Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.472
1.472 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.471 2023/09/04 10:29:58 job Exp $ */
1.1 deraadt 2: /*
1.13 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Identity and host key generation and maintenance.
1.31 deraadt 7: *
8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.13 deraadt 13: */
1.1 deraadt 14:
1.136 stevesk 15: #include <sys/types.h>
1.174 dtucker 16: #include <sys/socket.h>
1.136 stevesk 17: #include <sys/stat.h>
1.19 markus 18:
1.348 djm 19: #ifdef WITH_OPENSSL
1.19 markus 20: #include <openssl/evp.h>
21: #include <openssl/pem.h>
1.348 djm 22: #endif
1.145 stevesk 23:
1.347 djm 24: #include <stdint.h>
1.148 stevesk 25: #include <errno.h>
1.147 stevesk 26: #include <fcntl.h>
1.248 djm 27: #include <netdb.h>
1.145 stevesk 28: #include <pwd.h>
1.430 dtucker 29: #include <stdarg.h>
1.153 stevesk 30: #include <stdio.h>
1.152 stevesk 31: #include <stdlib.h>
1.150 stevesk 32: #include <string.h>
1.149 stevesk 33: #include <unistd.h>
1.253 deraadt 34: #include <limits.h>
1.294 djm 35: #include <locale.h>
1.1 deraadt 36:
37: #include "xmalloc.h"
1.252 djm 38: #include "sshkey.h"
1.19 markus 39: #include "authfile.h"
1.252 djm 40: #include "sshbuf.h"
1.40 markus 41: #include "pathnames.h"
1.41 markus 42: #include "log.h"
1.114 djm 43: #include "misc.h"
1.119 djm 44: #include "match.h"
45: #include "hostfile.h"
1.146 stevesk 46: #include "dns.h"
1.223 djm 47: #include "ssh.h"
1.179 djm 48: #include "ssh2.h"
1.252 djm 49: #include "ssherr.h"
1.223 djm 50: #include "atomicio.h"
51: #include "krl.h"
1.251 djm 52: #include "digest.h"
1.294 djm 53: #include "utf8.h"
1.305 djm 54: #include "authfd.h"
1.344 djm 55: #include "sshsig.h"
1.357 djm 56: #include "ssh-sk.h"
57: #include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */
1.426 dtucker 58: #include "cipher.h"
1.32 markus 59:
1.177 markus 60: #ifdef ENABLE_PKCS11
61: #include "ssh-pkcs11.h"
1.106 djm 62: #endif
1.66 markus 63:
1.471 job 64: #define DEFAULT_KEY_TYPE_NAME "ed25519"
1.273 djm 65:
1.328 dtucker 66: /*
1.329 dtucker 67: * Default number of bits in the RSA, DSA and ECDSA keys. These value can be
68: * overridden on the command line.
69: *
70: * These values, with the exception of DSA, provide security equivalent to at
71: * least 128 bits of security according to NIST Special Publication 800-57:
72: * Recommendation for Key Management Part 1 rev 4 section 5.6.1.
73: * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
74: * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
75: * SHA1 we limit the DSA key size 1k bits.
1.328 dtucker 76: */
77: #define DEFAULT_BITS 3072
1.130 markus 78: #define DEFAULT_BITS_DSA 1024
1.203 naddy 79: #define DEFAULT_BITS_ECDSA 256
1.1 deraadt 80:
1.325 djm 81: static int quiet = 0;
1.182 djm 82:
1.8 markus 83: /* Flag indicating that we just want to see the key fingerprint */
1.325 djm 84: static int print_fingerprint = 0;
85: static int print_bubblebabble = 0;
1.8 markus 86:
1.251 djm 87: /* Hash algorithm to use for fingerprints. */
1.325 djm 88: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.251 djm 89:
1.10 markus 90: /* The identity file name, given on the command line or entered by the user. */
1.351 deraadt 91: static char identity_file[PATH_MAX];
1.325 djm 92: static int have_identity = 0;
1.1 deraadt 93:
94: /* This is set to the passphrase if given on the command line. */
1.325 djm 95: static char *identity_passphrase = NULL;
1.1 deraadt 96:
97: /* This is set to the new passphrase if given on the command line. */
1.325 djm 98: static char *identity_new_passphrase = NULL;
1.186 djm 99:
1.179 djm 100: /* Key type when certifying */
1.325 djm 101: static u_int cert_key_type = SSH2_CERT_TYPE_USER;
1.179 djm 102:
103: /* "key ID" of signed key */
1.325 djm 104: static char *cert_key_id = NULL;
1.179 djm 105:
106: /* Comma-separated list of principal names for certifying keys */
1.325 djm 107: static char *cert_principals = NULL;
1.179 djm 108:
109: /* Validity period for certificates */
1.325 djm 110: static u_int64_t cert_valid_from = 0;
111: static u_int64_t cert_valid_to = ~0ULL;
1.179 djm 112:
1.186 djm 113: /* Certificate options */
1.371 djm 114: #define CERTOPT_X_FWD (1)
115: #define CERTOPT_AGENT_FWD (1<<1)
116: #define CERTOPT_PORT_FWD (1<<2)
117: #define CERTOPT_PTY (1<<3)
118: #define CERTOPT_USER_RC (1<<4)
119: #define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5)
1.453 naddy 120: #define CERTOPT_REQUIRE_VERIFY (1<<6)
1.190 djm 121: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
122: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
1.325 djm 123: static u_int32_t certflags_flags = CERTOPT_DEFAULT;
124: static char *certflags_command = NULL;
125: static char *certflags_src_addr = NULL;
1.179 djm 126:
1.300 djm 127: /* Arbitrary extensions specified by user */
1.415 djm 128: struct cert_ext {
1.300 djm 129: char *key;
130: char *val;
131: int crit;
132: };
1.415 djm 133: static struct cert_ext *cert_ext;
134: static size_t ncert_ext;
1.300 djm 135:
1.193 djm 136: /* Conversion to/from various formats */
137: enum {
138: FMT_RFC4716,
139: FMT_PKCS8,
140: FMT_PEM
141: } convert_format = FMT_RFC4716;
1.33 markus 142:
1.325 djm 143: static char *key_type_name = NULL;
1.19 markus 144:
1.197 djm 145: /* Load key from this PKCS#11 provider */
1.325 djm 146: static char *pkcs11provider = NULL;
1.193 djm 147:
1.357 djm 148: /* FIDO/U2F provider to use */
149: static char *sk_provider = NULL;
150:
1.336 djm 151: /* Format for writing private keys */
152: static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
1.237 markus 153:
154: /* Cipher for new-format private keys */
1.336 djm 155: static char *openssh_format_cipher = NULL;
1.237 markus 156:
1.376 djm 157: /* Number of KDF rounds to derive new format keys. */
1.325 djm 158: static int rounds = 0;
1.237 markus 159:
1.10 markus 160: /* argv0 */
161: extern char *__progname;
1.1 deraadt 162:
1.325 djm 163: static char hostname[NI_MAXHOST];
1.19 markus 164:
1.274 djm 165: #ifdef WITH_OPENSSL
1.115 djm 166: /* moduli.c */
1.124 avsm 167: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.215 dtucker 168: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
169: unsigned long);
1.274 djm 170: #endif
1.115 djm 171:
1.63 itojun 172: static void
1.255 djm 173: type_bits_valid(int type, const char *name, u_int32_t *bitsp)
1.206 stevesk 174: {
1.269 djm 175: if (type == KEY_UNSPEC)
176: fatal("unknown key type %s", key_type_name);
1.209 djm 177: if (*bitsp == 0) {
1.271 djm 178: #ifdef WITH_OPENSSL
1.423 djm 179: int nid;
1.339 naddy 180:
181: switch(type) {
182: case KEY_DSA:
1.209 djm 183: *bitsp = DEFAULT_BITS_DSA;
1.339 naddy 184: break;
185: case KEY_ECDSA:
1.255 djm 186: if (name != NULL &&
187: (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
188: *bitsp = sshkey_curve_nid_to_bits(nid);
189: if (*bitsp == 0)
190: *bitsp = DEFAULT_BITS_ECDSA;
1.339 naddy 191: break;
192: case KEY_RSA:
193: *bitsp = DEFAULT_BITS;
194: break;
195: }
1.271 djm 196: #endif
1.206 stevesk 197: }
1.271 djm 198: #ifdef WITH_OPENSSL
1.303 djm 199: switch (type) {
200: case KEY_DSA:
201: if (*bitsp != 1024)
202: fatal("Invalid DSA key length: must be 1024 bits");
203: break;
204: case KEY_RSA:
205: if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
206: fatal("Invalid RSA key length: minimum is %d bits",
207: SSH_RSA_MINIMUM_MODULUS_SIZE);
1.339 naddy 208: else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
209: fatal("Invalid RSA key length: maximum is %d bits",
210: OPENSSL_RSA_MAX_MODULUS_BITS);
1.303 djm 211: break;
212: case KEY_ECDSA:
213: if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
214: fatal("Invalid ECDSA key length: valid lengths are "
215: "256, 384 or 521 bits");
216: }
1.246 markus 217: #endif
1.206 stevesk 218: }
219:
1.343 djm 220: /*
221: * Checks whether a file exists and, if so, asks the user whether they wish
222: * to overwrite it.
223: * Returns nonzero if the file does not already exist or if the user agrees to
224: * overwrite, or zero otherwise.
225: */
226: static int
227: confirm_overwrite(const char *filename)
228: {
229: char yesno[3];
230: struct stat st;
231:
232: if (stat(filename, &st) != 0)
233: return 1;
234: printf("%s already exists.\n", filename);
235: printf("Overwrite (y/n)? ");
236: fflush(stdout);
237: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
238: return 0;
239: if (yesno[0] != 'y' && yesno[0] != 'Y')
240: return 0;
241: return 1;
242: }
243:
1.206 stevesk 244: static void
1.10 markus 245: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 246: {
1.12 markus 247: char buf[1024];
1.35 markus 248: char *name = NULL;
249:
1.92 stevesk 250: if (key_type_name == NULL)
1.471 job 251: name = _PATH_SSH_CLIENT_ID_ED25519;
1.140 deraadt 252: else {
1.252 djm 253: switch (sshkey_type_from_name(key_type_name)) {
1.472 ! djm 254: #ifdef WITH_DSA
1.186 djm 255: case KEY_DSA_CERT:
1.92 stevesk 256: case KEY_DSA:
257: name = _PATH_SSH_CLIENT_ID_DSA;
258: break;
1.472 ! djm 259: #endif
1.200 djm 260: case KEY_ECDSA_CERT:
261: case KEY_ECDSA:
262: name = _PATH_SSH_CLIENT_ID_ECDSA;
263: break;
1.357 djm 264: case KEY_ECDSA_SK_CERT:
265: case KEY_ECDSA_SK:
266: name = _PATH_SSH_CLIENT_ID_ECDSA_SK;
267: break;
1.186 djm 268: case KEY_RSA_CERT:
1.92 stevesk 269: case KEY_RSA:
270: name = _PATH_SSH_CLIENT_ID_RSA;
271: break;
1.238 markus 272: case KEY_ED25519:
273: case KEY_ED25519_CERT:
274: name = _PATH_SSH_CLIENT_ID_ED25519;
275: break;
1.362 markus 276: case KEY_ED25519_SK:
277: case KEY_ED25519_SK_CERT:
278: name = _PATH_SSH_CLIENT_ID_ED25519_SK;
279: break;
1.313 markus 280: case KEY_XMSS:
281: case KEY_XMSS_CERT:
282: name = _PATH_SSH_CLIENT_ID_XMSS;
283: break;
1.92 stevesk 284: default:
1.269 djm 285: fatal("bad key type");
1.92 stevesk 286: }
1.140 deraadt 287: }
1.269 djm 288: snprintf(identity_file, sizeof(identity_file),
289: "%s/%s", pw->pw_dir, name);
290: printf("%s (%s): ", prompt, identity_file);
291: fflush(stdout);
1.12 markus 292: if (fgets(buf, sizeof(buf), stdin) == NULL)
293: exit(1);
1.162 gilles 294: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 295: if (strcmp(buf, "") != 0)
296: strlcpy(identity_file, buf, sizeof(identity_file));
297: have_identity = 1;
1.7 markus 298: }
299:
1.252 djm 300: static struct sshkey *
1.342 djm 301: load_identity(const char *filename, char **commentp)
1.19 markus 302: {
1.52 markus 303: char *pass;
1.252 djm 304: struct sshkey *prv;
305: int r;
1.52 markus 306:
1.341 djm 307: if (commentp != NULL)
308: *commentp = NULL;
309: if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
1.252 djm 310: return prv;
311: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 312: fatal_r(r, "Load key \"%s\"", filename);
1.252 djm 313: if (identity_passphrase)
314: pass = xstrdup(identity_passphrase);
315: else
316: pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
1.341 djm 317: r = sshkey_load_private(filename, pass, &prv, commentp);
1.399 jsg 318: freezero(pass, strlen(pass));
1.252 djm 319: if (r != 0)
1.421 djm 320: fatal_r(r, "Load key \"%s\"", filename);
1.52 markus 321: return prv;
1.19 markus 322: }
323:
1.32 markus 324: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 325: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 326: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 327: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 328:
1.246 markus 329: #ifdef WITH_OPENSSL
1.63 itojun 330: static void
1.252 djm 331: do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
1.19 markus 332: {
1.337 djm 333: struct sshbuf *b;
334: char comment[61], *b64;
1.252 djm 335: int r;
1.19 markus 336:
1.337 djm 337: if ((b = sshbuf_new()) == NULL)
1.421 djm 338: fatal_f("sshbuf_new failed");
1.337 djm 339: if ((r = sshkey_putb(k, b)) != 0)
1.421 djm 340: fatal_fr(r, "put key");
1.337 djm 341: if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
1.421 djm 342: fatal_f("sshbuf_dtob64_string failed");
1.337 djm 343:
1.176 djm 344: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
345: snprintf(comment, sizeof(comment),
346: "%u-bit %s, converted by %s@%s from OpenSSH",
1.252 djm 347: sshkey_size(k), sshkey_type(k),
1.19 markus 348: pw->pw_name, hostname);
1.176 djm 349:
1.337 djm 350: sshkey_free(k);
351: sshbuf_free(b);
352:
1.176 djm 353: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.337 djm 354: fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
1.32 markus 355: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.337 djm 356: free(b64);
1.19 markus 357: exit(0);
358: }
359:
1.63 itojun 360: static void
1.252 djm 361: do_convert_to_pkcs8(struct sshkey *k)
1.193 djm 362: {
1.252 djm 363: switch (sshkey_type_plain(k->type)) {
1.193 djm 364: case KEY_RSA:
365: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
366: fatal("PEM_write_RSA_PUBKEY failed");
367: break;
1.472 ! djm 368: #ifdef WITH_DSA
1.193 djm 369: case KEY_DSA:
370: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
371: fatal("PEM_write_DSA_PUBKEY failed");
372: break;
1.472 ! djm 373: #endif
1.200 djm 374: case KEY_ECDSA:
375: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
376: fatal("PEM_write_EC_PUBKEY failed");
377: break;
1.193 djm 378: default:
1.421 djm 379: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 380: }
381: exit(0);
382: }
383:
384: static void
1.252 djm 385: do_convert_to_pem(struct sshkey *k)
1.193 djm 386: {
1.252 djm 387: switch (sshkey_type_plain(k->type)) {
1.193 djm 388: case KEY_RSA:
389: if (!PEM_write_RSAPublicKey(stdout, k->rsa))
390: fatal("PEM_write_RSAPublicKey failed");
1.389 djm 391: break;
1.472 ! djm 392: #ifdef WITH_DSA
1.389 djm 393: case KEY_DSA:
394: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
395: fatal("PEM_write_DSA_PUBKEY failed");
396: break;
1.472 ! djm 397: #endif
1.389 djm 398: case KEY_ECDSA:
399: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
400: fatal("PEM_write_EC_PUBKEY failed");
1.193 djm 401: break;
402: default:
1.421 djm 403: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 404: }
405: exit(0);
406: }
407:
408: static void
409: do_convert_to(struct passwd *pw)
410: {
1.252 djm 411: struct sshkey *k;
1.193 djm 412: struct stat st;
1.252 djm 413: int r;
1.193 djm 414:
415: if (!have_identity)
416: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 417: if (stat(identity_file, &st) == -1)
1.193 djm 418: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.252 djm 419: if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
1.341 djm 420: k = load_identity(identity_file, NULL);
1.193 djm 421: switch (convert_format) {
422: case FMT_RFC4716:
423: do_convert_to_ssh2(pw, k);
424: break;
425: case FMT_PKCS8:
426: do_convert_to_pkcs8(k);
427: break;
428: case FMT_PEM:
429: do_convert_to_pem(k);
430: break;
431: default:
1.421 djm 432: fatal_f("unknown key format %d", convert_format);
1.193 djm 433: }
434: exit(0);
435: }
436:
1.252 djm 437: /*
438: * This is almost exactly the bignum1 encoding, but with 32 bit for length
439: * instead of 16.
440: */
1.193 djm 441: static void
1.252 djm 442: buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
1.32 markus 443: {
1.252 djm 444: u_int bytes, bignum_bits;
445: int r;
1.53 markus 446:
1.252 djm 447: if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
1.421 djm 448: fatal_fr(r, "parse");
1.252 djm 449: bytes = (bignum_bits + 7) / 8;
450: if (sshbuf_len(b) < bytes)
1.421 djm 451: fatal_f("input buffer too small: need %d have %zu",
452: bytes, sshbuf_len(b));
1.252 djm 453: if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
1.421 djm 454: fatal_f("BN_bin2bn failed");
1.252 djm 455: if ((r = sshbuf_consume(b, bytes)) != 0)
1.421 djm 456: fatal_fr(r, "consume");
1.32 markus 457: }
458:
1.252 djm 459: static struct sshkey *
1.337 djm 460: do_convert_private_ssh2(struct sshbuf *b)
1.32 markus 461: {
1.252 djm 462: struct sshkey *key = NULL;
1.64 markus 463: char *type, *cipher;
1.466 djm 464: const char *alg = NULL;
1.252 djm 465: u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
466: int r, rlen, ktype;
467: u_int magic, i1, i2, i3, i4;
468: size_t slen;
1.62 markus 469: u_long e;
1.472 ! djm 470: #ifdef WITH_DSA
1.321 djm 471: BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
472: BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
1.472 ! djm 473: #endif
1.321 djm 474: BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
475: BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
1.337 djm 476:
1.252 djm 477: if ((r = sshbuf_get_u32(b, &magic)) != 0)
1.421 djm 478: fatal_fr(r, "parse magic");
1.32 markus 479:
480: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
1.252 djm 481: error("bad magic 0x%x != 0x%x", magic,
482: SSH_COM_PRIVATE_KEY_MAGIC);
1.32 markus 483: return NULL;
484: }
1.252 djm 485: if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
486: (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
487: (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
488: (r = sshbuf_get_u32(b, &i2)) != 0 ||
489: (r = sshbuf_get_u32(b, &i3)) != 0 ||
490: (r = sshbuf_get_u32(b, &i4)) != 0)
1.421 djm 491: fatal_fr(r, "parse");
1.158 stevesk 492: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 493: if (strcmp(cipher, "none") != 0) {
494: error("unsupported cipher %s", cipher);
1.227 djm 495: free(cipher);
496: free(type);
1.32 markus 497: return NULL;
498: }
1.227 djm 499: free(cipher);
1.32 markus 500:
1.472 ! djm 501: if (strstr(type, "rsa")) {
! 502: ktype = KEY_RSA;
! 503: #ifdef WITH_DSA
! 504: } else if (strstr(type, "dsa")) {
1.53 markus 505: ktype = KEY_DSA;
1.472 ! djm 506: #endif
1.53 markus 507: } else {
1.227 djm 508: free(type);
1.32 markus 509: return NULL;
510: }
1.322 djm 511: if ((key = sshkey_new(ktype)) == NULL)
512: fatal("sshkey_new failed");
1.227 djm 513: free(type);
1.53 markus 514:
515: switch (key->type) {
1.472 ! djm 516: #ifdef WITH_DSA
1.53 markus 517: case KEY_DSA:
1.321 djm 518: if ((dsa_p = BN_new()) == NULL ||
519: (dsa_q = BN_new()) == NULL ||
520: (dsa_g = BN_new()) == NULL ||
521: (dsa_pub_key = BN_new()) == NULL ||
522: (dsa_priv_key = BN_new()) == NULL)
1.421 djm 523: fatal_f("BN_new");
1.321 djm 524: buffer_get_bignum_bits(b, dsa_p);
525: buffer_get_bignum_bits(b, dsa_g);
526: buffer_get_bignum_bits(b, dsa_q);
527: buffer_get_bignum_bits(b, dsa_pub_key);
528: buffer_get_bignum_bits(b, dsa_priv_key);
529: if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
1.421 djm 530: fatal_f("DSA_set0_pqg failed");
1.321 djm 531: dsa_p = dsa_q = dsa_g = NULL; /* transferred */
532: if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
1.421 djm 533: fatal_f("DSA_set0_key failed");
1.321 djm 534: dsa_pub_key = dsa_priv_key = NULL; /* transferred */
1.53 markus 535: break;
1.472 ! djm 536: #endif
1.53 markus 537: case KEY_RSA:
1.252 djm 538: if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
539: (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
540: (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
1.421 djm 541: fatal_fr(r, "parse RSA");
1.252 djm 542: e = e1;
1.62 markus 543: debug("e %lx", e);
544: if (e < 30) {
545: e <<= 8;
1.252 djm 546: e += e2;
1.62 markus 547: debug("e %lx", e);
548: e <<= 8;
1.252 djm 549: e += e3;
1.62 markus 550: debug("e %lx", e);
551: }
1.321 djm 552: if ((rsa_e = BN_new()) == NULL)
1.421 djm 553: fatal_f("BN_new");
1.321 djm 554: if (!BN_set_word(rsa_e, e)) {
555: BN_clear_free(rsa_e);
1.252 djm 556: sshkey_free(key);
1.53 markus 557: return NULL;
558: }
1.321 djm 559: if ((rsa_n = BN_new()) == NULL ||
560: (rsa_d = BN_new()) == NULL ||
561: (rsa_p = BN_new()) == NULL ||
562: (rsa_q = BN_new()) == NULL ||
563: (rsa_iqmp = BN_new()) == NULL)
1.421 djm 564: fatal_f("BN_new");
1.321 djm 565: buffer_get_bignum_bits(b, rsa_d);
566: buffer_get_bignum_bits(b, rsa_n);
567: buffer_get_bignum_bits(b, rsa_iqmp);
568: buffer_get_bignum_bits(b, rsa_q);
569: buffer_get_bignum_bits(b, rsa_p);
570: if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
1.421 djm 571: fatal_f("RSA_set0_key failed");
1.321 djm 572: rsa_n = rsa_e = rsa_d = NULL; /* transferred */
573: if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
1.421 djm 574: fatal_f("RSA_set0_factors failed");
1.321 djm 575: rsa_p = rsa_q = NULL; /* transferred */
576: if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
1.421 djm 577: fatal_fr(r, "generate RSA parameters");
1.321 djm 578: BN_clear_free(rsa_iqmp);
1.466 djm 579: alg = "rsa-sha2-256";
1.53 markus 580: break;
581: }
1.252 djm 582: rlen = sshbuf_len(b);
1.85 deraadt 583: if (rlen != 0)
1.421 djm 584: error_f("remaining bytes in key blob %d", rlen);
1.64 markus 585:
586: /* try the key */
1.455 djm 587: if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data),
1.466 djm 588: alg, NULL, NULL, 0)) != 0)
1.455 djm 589: error_fr(r, "signing with converted key failed");
590: else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
1.466 djm 591: alg, 0, NULL)) != 0)
1.455 djm 592: error_fr(r, "verification with converted key failed");
593: if (r != 0) {
1.252 djm 594: sshkey_free(key);
595: free(sig);
596: return NULL;
597: }
1.227 djm 598: free(sig);
1.32 markus 599: return key;
600: }
601:
1.137 dtucker 602: static int
603: get_line(FILE *fp, char *line, size_t len)
604: {
605: int c;
606: size_t pos = 0;
607:
608: line[0] = '\0';
609: while ((c = fgetc(fp)) != EOF) {
1.269 djm 610: if (pos >= len - 1)
611: fatal("input line too long.");
1.140 deraadt 612: switch (c) {
1.137 dtucker 613: case '\r':
614: c = fgetc(fp);
1.269 djm 615: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
616: fatal("unget: %s", strerror(errno));
1.137 dtucker 617: return pos;
618: case '\n':
619: return pos;
620: }
621: line[pos++] = c;
622: line[pos] = '\0';
623: }
1.157 stevesk 624: /* We reached EOF */
625: return -1;
1.137 dtucker 626: }
627:
1.63 itojun 628: static void
1.252 djm 629: do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
1.19 markus 630: {
1.252 djm 631: int r, blen, escaped = 0;
1.98 markus 632: u_int len;
1.137 dtucker 633: char line[1024];
1.337 djm 634: struct sshbuf *buf;
1.19 markus 635: char encoded[8096];
636: FILE *fp;
637:
1.337 djm 638: if ((buf = sshbuf_new()) == NULL)
639: fatal("sshbuf_new failed");
1.191 djm 640: if ((fp = fopen(identity_file, "r")) == NULL)
641: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 642: encoded[0] = '\0';
1.137 dtucker 643: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
1.228 djm 644: if (blen > 0 && line[blen - 1] == '\\')
1.25 markus 645: escaped++;
1.19 markus 646: if (strncmp(line, "----", 4) == 0 ||
647: strstr(line, ": ") != NULL) {
1.32 markus 648: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 649: *private = 1;
1.64 markus 650: if (strstr(line, " END ") != NULL) {
651: break;
652: }
1.60 markus 653: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 654: continue;
655: }
1.25 markus 656: if (escaped) {
657: escaped--;
1.60 markus 658: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 659: continue;
1.19 markus 660: }
661: strlcat(encoded, line, sizeof(encoded));
662: }
1.98 markus 663: len = strlen(encoded);
664: if (((len % 4) == 3) &&
665: (encoded[len-1] == '=') &&
666: (encoded[len-2] == '=') &&
667: (encoded[len-3] == '='))
668: encoded[len-3] = '\0';
1.337 djm 669: if ((r = sshbuf_b64tod(buf, encoded)) != 0)
1.421 djm 670: fatal_fr(r, "base64 decode");
1.408 djm 671: if (*private) {
672: if ((*k = do_convert_private_ssh2(buf)) == NULL)
1.421 djm 673: fatal_f("private key conversion failed");
1.408 djm 674: } else if ((r = sshkey_fromb(buf, k)) != 0)
1.421 djm 675: fatal_fr(r, "parse key");
1.356 djm 676: sshbuf_free(buf);
1.193 djm 677: fclose(fp);
678: }
679:
680: static void
1.252 djm 681: do_convert_from_pkcs8(struct sshkey **k, int *private)
1.193 djm 682: {
683: EVP_PKEY *pubkey;
684: FILE *fp;
685:
686: if ((fp = fopen(identity_file, "r")) == NULL)
687: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
688: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
1.421 djm 689: fatal_f("%s is not a recognised public key format",
1.193 djm 690: identity_file);
691: }
692: fclose(fp);
1.321 djm 693: switch (EVP_PKEY_base_id(pubkey)) {
1.193 djm 694: case EVP_PKEY_RSA:
1.252 djm 695: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
696: fatal("sshkey_new failed");
1.193 djm 697: (*k)->type = KEY_RSA;
698: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
699: break;
1.472 ! djm 700: #ifdef WITH_DSA
1.193 djm 701: case EVP_PKEY_DSA:
1.252 djm 702: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
703: fatal("sshkey_new failed");
1.193 djm 704: (*k)->type = KEY_DSA;
705: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
706: break;
1.472 ! djm 707: #endif
1.200 djm 708: case EVP_PKEY_EC:
1.252 djm 709: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
710: fatal("sshkey_new failed");
1.200 djm 711: (*k)->type = KEY_ECDSA;
712: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
1.252 djm 713: (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
1.200 djm 714: break;
1.193 djm 715: default:
1.421 djm 716: fatal_f("unsupported pubkey type %d",
1.321 djm 717: EVP_PKEY_base_id(pubkey));
1.193 djm 718: }
719: EVP_PKEY_free(pubkey);
720: return;
721: }
722:
723: static void
1.252 djm 724: do_convert_from_pem(struct sshkey **k, int *private)
1.193 djm 725: {
726: FILE *fp;
727: RSA *rsa;
728:
729: if ((fp = fopen(identity_file, "r")) == NULL)
730: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
731: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
1.252 djm 732: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
733: fatal("sshkey_new failed");
1.193 djm 734: (*k)->type = KEY_RSA;
735: (*k)->rsa = rsa;
736: fclose(fp);
737: return;
738: }
1.421 djm 739: fatal_f("unrecognised raw private key format");
1.193 djm 740: }
741:
742: static void
743: do_convert_from(struct passwd *pw)
744: {
1.252 djm 745: struct sshkey *k = NULL;
746: int r, private = 0, ok = 0;
1.193 djm 747: struct stat st;
748:
749: if (!have_identity)
750: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 751: if (stat(identity_file, &st) == -1)
1.193 djm 752: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
753:
754: switch (convert_format) {
755: case FMT_RFC4716:
756: do_convert_from_ssh2(pw, &k, &private);
757: break;
758: case FMT_PKCS8:
759: do_convert_from_pkcs8(&k, &private);
760: break;
761: case FMT_PEM:
762: do_convert_from_pem(&k, &private);
763: break;
764: default:
1.421 djm 765: fatal_f("unknown key format %d", convert_format);
1.193 djm 766: }
767:
1.260 djm 768: if (!private) {
1.252 djm 769: if ((r = sshkey_write(k, stdout)) == 0)
770: ok = 1;
1.193 djm 771: if (ok)
772: fprintf(stdout, "\n");
1.260 djm 773: } else {
1.193 djm 774: switch (k->type) {
1.472 ! djm 775: #ifdef WITH_DSA
1.193 djm 776: case KEY_DSA:
777: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
778: NULL, 0, NULL, NULL);
779: break;
1.472 ! djm 780: #endif
1.200 djm 781: case KEY_ECDSA:
782: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
783: NULL, 0, NULL, NULL);
784: break;
1.193 djm 785: case KEY_RSA:
786: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
787: NULL, 0, NULL, NULL);
788: break;
789: default:
1.421 djm 790: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 791: }
792: }
793:
1.269 djm 794: if (!ok)
795: fatal("key write failed");
1.252 djm 796: sshkey_free(k);
1.19 markus 797: exit(0);
798: }
1.246 markus 799: #endif
1.19 markus 800:
1.63 itojun 801: static void
1.19 markus 802: do_print_public(struct passwd *pw)
803: {
1.252 djm 804: struct sshkey *prv;
1.19 markus 805: struct stat st;
1.252 djm 806: int r;
1.341 djm 807: char *comment = NULL;
1.19 markus 808:
809: if (!have_identity)
810: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 811: if (stat(identity_file, &st) == -1)
1.269 djm 812: fatal("%s: %s", identity_file, strerror(errno));
1.341 djm 813: prv = load_identity(identity_file, &comment);
1.252 djm 814: if ((r = sshkey_write(prv, stdout)) != 0)
1.421 djm 815: fatal_fr(r, "write key");
1.341 djm 816: if (comment != NULL && *comment != '\0')
817: fprintf(stdout, " %s", comment);
1.19 markus 818: fprintf(stdout, "\n");
1.419 djm 819: if (sshkey_is_sk(prv)) {
820: debug("sk_application: \"%s\", sk_flags 0x%02x",
821: prv->sk_application, prv->sk_flags);
822: }
823: sshkey_free(prv);
1.341 djm 824: free(comment);
1.19 markus 825: exit(0);
826: }
827:
1.66 markus 828: static void
1.197 djm 829: do_download(struct passwd *pw)
1.75 markus 830: {
1.177 markus 831: #ifdef ENABLE_PKCS11
1.252 djm 832: struct sshkey **keys = NULL;
1.177 markus 833: int i, nkeys;
1.252 djm 834: enum sshkey_fp_rep rep;
1.251 djm 835: int fptype;
1.392 djm 836: char *fp, *ra, **comments = NULL;
1.222 djm 837:
1.251 djm 838: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
839: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.75 markus 840:
1.327 benno 841: pkcs11_init(1);
1.392 djm 842: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);
1.177 markus 843: if (nkeys <= 0)
844: fatal("cannot read public key from pkcs11");
845: for (i = 0; i < nkeys; i++) {
1.221 djm 846: if (print_fingerprint) {
1.252 djm 847: fp = sshkey_fingerprint(keys[i], fptype, rep);
848: ra = sshkey_fingerprint(keys[i], fingerprint_hash,
1.221 djm 849: SSH_FP_RANDOMART);
1.259 djm 850: if (fp == NULL || ra == NULL)
1.421 djm 851: fatal_f("sshkey_fingerprint fail");
1.252 djm 852: printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
853: fp, sshkey_type(keys[i]));
1.325 djm 854: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.221 djm 855: printf("%s\n", ra);
1.227 djm 856: free(ra);
857: free(fp);
1.221 djm 858: } else {
1.252 djm 859: (void) sshkey_write(keys[i], stdout); /* XXX check */
1.392 djm 860: fprintf(stdout, "%s%s\n",
861: *(comments[i]) == '\0' ? "" : " ", comments[i]);
1.221 djm 862: }
1.392 djm 863: free(comments[i]);
1.252 djm 864: sshkey_free(keys[i]);
1.97 markus 865: }
1.392 djm 866: free(comments);
1.227 djm 867: free(keys);
1.177 markus 868: pkcs11_terminate();
1.75 markus 869: exit(0);
1.177 markus 870: #else
871: fatal("no pkcs11 support");
872: #endif /* ENABLE_PKCS11 */
1.75 markus 873: }
1.66 markus 874:
1.279 djm 875: static struct sshkey *
876: try_read_key(char **cpp)
877: {
878: struct sshkey *ret;
879: int r;
880:
881: if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
882: fatal("sshkey_new failed");
883: if ((r = sshkey_read(ret, cpp)) == 0)
884: return ret;
885: /* Not a key */
886: sshkey_free(ret);
887: return NULL;
888: }
889:
1.63 itojun 890: static void
1.279 djm 891: fingerprint_one_key(const struct sshkey *public, const char *comment)
1.8 markus 892: {
1.279 djm 893: char *fp = NULL, *ra = NULL;
1.252 djm 894: enum sshkey_fp_rep rep;
1.251 djm 895: int fptype;
1.12 markus 896:
1.251 djm 897: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
898: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.279 djm 899: fp = sshkey_fingerprint(public, fptype, rep);
900: ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
901: if (fp == NULL || ra == NULL)
1.421 djm 902: fatal_f("sshkey_fingerprint failed");
1.294 djm 903: mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
1.279 djm 904: comment ? comment : "no comment", sshkey_type(public));
1.325 djm 905: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.279 djm 906: printf("%s\n", ra);
907: free(ra);
908: free(fp);
909: }
910:
911: static void
912: fingerprint_private(const char *path)
913: {
914: struct stat st;
915: char *comment = NULL;
1.407 djm 916: struct sshkey *privkey = NULL, *pubkey = NULL;
1.279 djm 917: int r;
918:
1.333 deraadt 919: if (stat(identity_file, &st) == -1)
1.279 djm 920: fatal("%s: %s", path, strerror(errno));
1.407 djm 921: if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)
1.421 djm 922: debug_r(r, "load public \"%s\"", path);
1.407 djm 923: if (pubkey == NULL || comment == NULL || *comment == '\0') {
924: free(comment);
925: if ((r = sshkey_load_private(path, NULL,
926: &privkey, &comment)) != 0)
1.421 djm 927: debug_r(r, "load private \"%s\"", path);
1.407 djm 928: }
929: if (pubkey == NULL && privkey == NULL)
930: fatal("%s is not a key file.", path);
931:
932: fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);
933: sshkey_free(pubkey);
934: sshkey_free(privkey);
1.279 djm 935: free(comment);
936: }
937:
938: static void
939: do_fingerprint(struct passwd *pw)
940: {
941: FILE *f;
942: struct sshkey *public = NULL;
1.317 markus 943: char *comment = NULL, *cp, *ep, *line = NULL;
944: size_t linesize = 0;
1.279 djm 945: int i, invalid = 1;
946: const char *path;
1.289 djm 947: u_long lnum = 0;
1.279 djm 948:
1.12 markus 949: if (!have_identity)
950: ask_filename(pw, "Enter file in which the key is");
1.279 djm 951: path = identity_file;
1.15 markus 952:
1.279 djm 953: if (strcmp(identity_file, "-") == 0) {
954: f = stdin;
955: path = "(stdin)";
956: } else if ((f = fopen(path, "r")) == NULL)
957: fatal("%s: %s: %s", __progname, path, strerror(errno));
958:
1.317 markus 959: while (getline(&line, &linesize, f) != -1) {
960: lnum++;
1.279 djm 961: cp = line;
962: cp[strcspn(cp, "\n")] = '\0';
963: /* Trim leading space and comments */
964: cp = line + strspn(line, " \t");
965: if (*cp == '#' || *cp == '\0')
966: continue;
1.191 djm 967:
1.279 djm 968: /*
969: * Input may be plain keys, private keys, authorized_keys
970: * or known_hosts.
971: */
972:
973: /*
974: * Try private keys first. Assume a key is private if
975: * "SSH PRIVATE KEY" appears on the first line and we're
976: * not reading from stdin (XXX support private keys on stdin).
977: */
978: if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
1.280 djm 979: strstr(cp, "PRIVATE KEY") != NULL) {
1.317 markus 980: free(line);
1.279 djm 981: fclose(f);
982: fingerprint_private(path);
983: exit(0);
984: }
985:
986: /*
987: * If it's not a private key, then this must be prepared to
988: * accept a public key prefixed with a hostname or options.
989: * Try a bare key first, otherwise skip the leading stuff.
990: */
1.468 djm 991: comment = NULL;
1.279 djm 992: if ((public = try_read_key(&cp)) == NULL) {
993: i = strtol(cp, &ep, 10);
994: if (i == 0 || ep == NULL ||
995: (*ep != ' ' && *ep != '\t')) {
996: int quoted = 0;
997:
998: comment = cp;
999: for (; *cp && (quoted || (*cp != ' ' &&
1000: *cp != '\t')); cp++) {
1001: if (*cp == '\\' && cp[1] == '"')
1002: cp++; /* Skip both */
1003: else if (*cp == '"')
1004: quoted = !quoted;
1005: }
1006: if (!*cp)
1007: continue;
1008: *cp++ = '\0';
1009: }
1.191 djm 1010: }
1.279 djm 1011: /* Retry after parsing leading hostname/key options */
1012: if (public == NULL && (public = try_read_key(&cp)) == NULL) {
1.289 djm 1013: debug("%s:%lu: not a public key", path, lnum);
1.191 djm 1014: continue;
1015: }
1016:
1.279 djm 1017: /* Find trailing comment, if any */
1018: for (; *cp == ' ' || *cp == '\t'; cp++)
1.191 djm 1019: ;
1.279 djm 1020: if (*cp != '\0' && *cp != '#')
1.191 djm 1021: comment = cp;
1.279 djm 1022:
1023: fingerprint_one_key(public, comment);
1.252 djm 1024: sshkey_free(public);
1.279 djm 1025: invalid = 0; /* One good key in the file is sufficient */
1.15 markus 1026: }
1.191 djm 1027: fclose(f);
1.317 markus 1028: free(line);
1.191 djm 1029:
1.269 djm 1030: if (invalid)
1.279 djm 1031: fatal("%s is not a public key file.", path);
1.12 markus 1032: exit(0);
1.8 markus 1033: }
1034:
1.119 djm 1035: static void
1.206 stevesk 1036: do_gen_all_hostkeys(struct passwd *pw)
1037: {
1038: struct {
1039: char *key_type;
1040: char *key_type_display;
1041: char *path;
1042: } key_types[] = {
1.267 djm 1043: #ifdef WITH_OPENSSL
1.206 stevesk 1044: { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
1045: { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
1.267 djm 1046: #endif /* WITH_OPENSSL */
1.238 markus 1047: { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
1.313 markus 1048: #ifdef WITH_XMSS
1049: { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
1050: #endif /* WITH_XMSS */
1.206 stevesk 1051: { NULL, NULL, NULL }
1052: };
1053:
1.340 dtucker 1054: u_int32_t bits = 0;
1.206 stevesk 1055: int first = 0;
1056: struct stat st;
1.252 djm 1057: struct sshkey *private, *public;
1.307 djm 1058: char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
1.252 djm 1059: int i, type, fd, r;
1.206 stevesk 1060:
1061: for (i = 0; key_types[i].key_type; i++) {
1.307 djm 1062: public = private = NULL;
1063: prv_tmp = pub_tmp = prv_file = pub_file = NULL;
1064:
1065: xasprintf(&prv_file, "%s%s",
1066: identity_file, key_types[i].path);
1067:
1068: /* Check whether private key exists and is not zero-length */
1069: if (stat(prv_file, &st) == 0) {
1070: if (st.st_size != 0)
1071: goto next;
1072: } else if (errno != ENOENT) {
1.269 djm 1073: error("Could not stat %s: %s", key_types[i].path,
1.206 stevesk 1074: strerror(errno));
1.307 djm 1075: goto failnext;
1.206 stevesk 1076: }
1077:
1.307 djm 1078: /*
1079: * Private key doesn't exist or is invalid; proceed with
1080: * key generation.
1081: */
1082: xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
1083: identity_file, key_types[i].path);
1084: xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
1085: identity_file, key_types[i].path);
1086: xasprintf(&pub_file, "%s%s.pub",
1087: identity_file, key_types[i].path);
1088:
1.206 stevesk 1089: if (first == 0) {
1090: first = 1;
1091: printf("%s: generating new host keys: ", __progname);
1092: }
1093: printf("%s ", key_types[i].key_type_display);
1094: fflush(stdout);
1.252 djm 1095: type = sshkey_type_from_name(key_types[i].key_type);
1.307 djm 1096: if ((fd = mkstemp(prv_tmp)) == -1) {
1.409 djm 1097: error("Could not save your private key in %s: %s",
1.307 djm 1098: prv_tmp, strerror(errno));
1099: goto failnext;
1100: }
1.409 djm 1101: (void)close(fd); /* just using mkstemp() to reserve a name */
1.206 stevesk 1102: bits = 0;
1.255 djm 1103: type_bits_valid(type, NULL, &bits);
1.252 djm 1104: if ((r = sshkey_generate(type, bits, &private)) != 0) {
1.421 djm 1105: error_r(r, "sshkey_generate failed");
1.307 djm 1106: goto failnext;
1.206 stevesk 1107: }
1.252 djm 1108: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1109: fatal_fr(r, "sshkey_from_private");
1.206 stevesk 1110: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1111: hostname);
1.307 djm 1112: if ((r = sshkey_save_private(private, prv_tmp, "",
1.336 djm 1113: comment, private_key_format, openssh_format_cipher,
1114: rounds)) != 0) {
1.421 djm 1115: error_r(r, "Saving key \"%s\" failed", prv_tmp);
1.307 djm 1116: goto failnext;
1.206 stevesk 1117: }
1.307 djm 1118: if ((fd = mkstemp(pub_tmp)) == -1) {
1119: error("Could not save your public key in %s: %s",
1120: pub_tmp, strerror(errno));
1121: goto failnext;
1.206 stevesk 1122: }
1.307 djm 1123: (void)fchmod(fd, 0644);
1.409 djm 1124: (void)close(fd);
1125: if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {
1.421 djm 1126: error_r(r, "Unable to save public key to %s",
1127: identity_file);
1.307 djm 1128: goto failnext;
1129: }
1130:
1131: /* Rename temporary files to their permanent locations. */
1132: if (rename(pub_tmp, pub_file) != 0) {
1133: error("Unable to move %s into position: %s",
1134: pub_file, strerror(errno));
1135: goto failnext;
1136: }
1137: if (rename(prv_tmp, prv_file) != 0) {
1138: error("Unable to move %s into position: %s",
1139: key_types[i].path, strerror(errno));
1140: failnext:
1.206 stevesk 1141: first = 0;
1.307 djm 1142: goto next;
1.206 stevesk 1143: }
1.307 djm 1144: next:
1145: sshkey_free(private);
1.252 djm 1146: sshkey_free(public);
1.307 djm 1147: free(prv_tmp);
1148: free(pub_tmp);
1149: free(prv_file);
1150: free(pub_file);
1.206 stevesk 1151: }
1152: if (first != 0)
1153: printf("\n");
1154: }
1155:
1.256 djm 1156: struct known_hosts_ctx {
1.257 djm 1157: const char *host; /* Hostname searched for in find/delete case */
1158: FILE *out; /* Output file, stdout for find_hosts case */
1159: int has_unhashed; /* When hashing, original had unhashed hosts */
1160: int found_key; /* For find/delete, host was found */
1161: int invalid; /* File contained invalid items; don't delete */
1.325 djm 1162: int hash_hosts; /* Hash hostnames as we go */
1163: int find_host; /* Search for specific hostname */
1164: int delete_host; /* Delete host from known_hosts */
1.256 djm 1165: };
1166:
1167: static int
1168: known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1.119 djm 1169: {
1.256 djm 1170: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1171: char *hashed, *cp, *hosts, *ohosts;
1172: int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1.298 dtucker 1173: int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1.256 djm 1174:
1.262 djm 1175: switch (l->status) {
1176: case HKF_STATUS_OK:
1177: case HKF_STATUS_MATCHED:
1178: /*
1.467 jsg 1179: * Don't hash hosts already hashed, with wildcard
1.262 djm 1180: * characters or a CA/revocation marker.
1181: */
1.296 djm 1182: if (was_hashed || has_wild || l->marker != MRK_NONE) {
1.262 djm 1183: fprintf(ctx->out, "%s\n", l->line);
1.325 djm 1184: if (has_wild && !ctx->find_host) {
1.297 dtucker 1185: logit("%s:%lu: ignoring host name "
1.269 djm 1186: "with wildcard: %.64s", l->path,
1.262 djm 1187: l->linenum, l->hosts);
1188: }
1189: return 0;
1190: }
1191: /*
1192: * Split any comma-separated hostnames from the host list,
1193: * hash and store separately.
1194: */
1195: ohosts = hosts = xstrdup(l->hosts);
1196: while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1.299 djm 1197: lowercase(cp);
1.262 djm 1198: if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1199: fatal("hash_host failed");
1200: fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1.438 dtucker 1201: free(hashed);
1.262 djm 1202: ctx->has_unhashed = 1;
1203: }
1204: free(ohosts);
1205: return 0;
1206: case HKF_STATUS_INVALID:
1207: /* Retain invalid lines, but mark file as invalid. */
1.256 djm 1208: ctx->invalid = 1;
1.297 dtucker 1209: logit("%s:%lu: invalid line", l->path, l->linenum);
1.262 djm 1210: /* FALLTHROUGH */
1211: default:
1.256 djm 1212: fprintf(ctx->out, "%s\n", l->line);
1213: return 0;
1214: }
1.262 djm 1215: /* NOTREACHED */
1216: return -1;
1.256 djm 1217: }
1218:
1219: static int
1220: known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1221: {
1222: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1.272 djm 1223: enum sshkey_fp_rep rep;
1224: int fptype;
1.338 djm 1225: char *fp = NULL, *ra = NULL;
1.272 djm 1226:
1227: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1228: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.256 djm 1229:
1.262 djm 1230: if (l->status == HKF_STATUS_MATCHED) {
1.325 djm 1231: if (ctx->delete_host) {
1.256 djm 1232: if (l->marker != MRK_NONE) {
1233: /* Don't remove CA and revocation lines */
1234: fprintf(ctx->out, "%s\n", l->line);
1235: } else {
1236: /*
1237: * Hostname matches and has no CA/revoke
1238: * marker, delete it by *not* writing the
1239: * line to ctx->out.
1240: */
1241: ctx->found_key = 1;
1242: if (!quiet)
1.297 dtucker 1243: printf("# Host %s found: line %lu\n",
1.256 djm 1244: ctx->host, l->linenum);
1245: }
1246: return 0;
1.325 djm 1247: } else if (ctx->find_host) {
1.256 djm 1248: ctx->found_key = 1;
1249: if (!quiet) {
1.297 dtucker 1250: printf("# Host %s found: line %lu %s\n",
1.256 djm 1251: ctx->host,
1252: l->linenum, l->marker == MRK_CA ? "CA" :
1253: (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1254: }
1.325 djm 1255: if (ctx->hash_hosts)
1.256 djm 1256: known_hosts_hash(l, ctx);
1.272 djm 1257: else if (print_fingerprint) {
1258: fp = sshkey_fingerprint(l->key, fptype, rep);
1.338 djm 1259: ra = sshkey_fingerprint(l->key,
1260: fingerprint_hash, SSH_FP_RANDOMART);
1261: if (fp == NULL || ra == NULL)
1.421 djm 1262: fatal_f("sshkey_fingerprint failed");
1.385 claudio 1263: mprintf("%s %s %s%s%s\n", ctx->host,
1264: sshkey_type(l->key), fp,
1265: l->comment[0] ? " " : "",
1266: l->comment);
1.338 djm 1267: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1268: printf("%s\n", ra);
1269: free(ra);
1.272 djm 1270: free(fp);
1271: } else
1.256 djm 1272: fprintf(ctx->out, "%s\n", l->line);
1273: return 0;
1274: }
1.325 djm 1275: } else if (ctx->delete_host) {
1.256 djm 1276: /* Retain non-matching hosts when deleting */
1277: if (l->status == HKF_STATUS_INVALID) {
1278: ctx->invalid = 1;
1.297 dtucker 1279: logit("%s:%lu: invalid line", l->path, l->linenum);
1.256 djm 1280: }
1281: fprintf(ctx->out, "%s\n", l->line);
1.166 djm 1282: }
1.256 djm 1283: return 0;
1.119 djm 1284: }
1285:
1286: static void
1.325 djm 1287: do_known_hosts(struct passwd *pw, const char *name, int find_host,
1288: int delete_host, int hash_hosts)
1.119 djm 1289: {
1.258 deraadt 1290: char *cp, tmp[PATH_MAX], old[PATH_MAX];
1.257 djm 1291: int r, fd, oerrno, inplace = 0;
1.256 djm 1292: struct known_hosts_ctx ctx;
1.272 djm 1293: u_int foreach_options;
1.410 djm 1294: struct stat sb;
1.119 djm 1295:
1296: if (!have_identity) {
1297: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1298: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1299: sizeof(identity_file))
1300: fatal("Specified known hosts path too long");
1.227 djm 1301: free(cp);
1.119 djm 1302: have_identity = 1;
1303: }
1.410 djm 1304: if (stat(identity_file, &sb) != 0)
1305: fatal("Cannot stat %s: %s", identity_file, strerror(errno));
1.119 djm 1306:
1.256 djm 1307: memset(&ctx, 0, sizeof(ctx));
1308: ctx.out = stdout;
1309: ctx.host = name;
1.325 djm 1310: ctx.hash_hosts = hash_hosts;
1311: ctx.find_host = find_host;
1312: ctx.delete_host = delete_host;
1.256 djm 1313:
1.119 djm 1314: /*
1315: * Find hosts goes to stdout, hash and deletions happen in-place
1316: * A corner case is ssh-keygen -HF foo, which should go to stdout
1317: */
1318: if (!find_host && (hash_hosts || delete_host)) {
1319: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1320: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1321: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1322: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1323: fatal("known_hosts path too long");
1324: umask(077);
1.256 djm 1325: if ((fd = mkstemp(tmp)) == -1)
1.119 djm 1326: fatal("mkstemp: %s", strerror(errno));
1.256 djm 1327: if ((ctx.out = fdopen(fd, "w")) == NULL) {
1328: oerrno = errno;
1.119 djm 1329: unlink(tmp);
1.256 djm 1330: fatal("fdopen: %s", strerror(oerrno));
1.119 djm 1331: }
1.463 dtucker 1332: (void)fchmod(fd, sb.st_mode & 0644);
1.257 djm 1333: inplace = 1;
1.119 djm 1334: }
1.256 djm 1335: /* XXX support identity_file == "-" for stdin */
1.272 djm 1336: foreach_options = find_host ? HKF_WANT_MATCH : 0;
1337: foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1.316 djm 1338: if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
1.315 djm 1339: known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
1.427 djm 1340: foreach_options, 0)) != 0) {
1.284 deraadt 1341: if (inplace)
1342: unlink(tmp);
1.421 djm 1343: fatal_fr(r, "hostkeys_foreach");
1.284 deraadt 1344: }
1.119 djm 1345:
1.257 djm 1346: if (inplace)
1.256 djm 1347: fclose(ctx.out);
1.119 djm 1348:
1.256 djm 1349: if (ctx.invalid) {
1.269 djm 1350: error("%s is not a valid known_hosts file.", identity_file);
1.257 djm 1351: if (inplace) {
1.269 djm 1352: error("Not replacing existing known_hosts "
1353: "file because of errors");
1.119 djm 1354: unlink(tmp);
1355: }
1356: exit(1);
1.256 djm 1357: } else if (delete_host && !ctx.found_key) {
1.269 djm 1358: logit("Host %s not found in %s", name, identity_file);
1.277 djm 1359: if (inplace)
1360: unlink(tmp);
1.257 djm 1361: } else if (inplace) {
1.119 djm 1362: /* Backup existing file */
1363: if (unlink(old) == -1 && errno != ENOENT)
1364: fatal("unlink %.100s: %s", old, strerror(errno));
1365: if (link(identity_file, old) == -1)
1366: fatal("link %.100s to %.100s: %s", identity_file, old,
1367: strerror(errno));
1368: /* Move new one into place */
1369: if (rename(tmp, identity_file) == -1) {
1370: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1371: strerror(errno));
1372: unlink(tmp);
1373: unlink(old);
1374: exit(1);
1375: }
1376:
1.269 djm 1377: printf("%s updated.\n", identity_file);
1378: printf("Original contents retained as %s\n", old);
1.256 djm 1379: if (ctx.has_unhashed) {
1.269 djm 1380: logit("WARNING: %s contains unhashed entries", old);
1381: logit("Delete this file to ensure privacy "
1382: "of hostnames");
1.119 djm 1383: }
1384: }
1385:
1.256 djm 1386: exit (find_host && !ctx.found_key);
1.119 djm 1387: }
1388:
1.13 deraadt 1389: /*
1390: * Perform changing a passphrase. The argument is the passwd structure
1391: * for the current user.
1392: */
1.63 itojun 1393: static void
1.7 markus 1394: do_change_passphrase(struct passwd *pw)
1395: {
1.12 markus 1396: char *comment;
1397: char *old_passphrase, *passphrase1, *passphrase2;
1398: struct stat st;
1.252 djm 1399: struct sshkey *private;
1400: int r;
1.12 markus 1401:
1402: if (!have_identity)
1403: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1404: if (stat(identity_file, &st) == -1)
1.269 djm 1405: fatal("%s: %s", identity_file, strerror(errno));
1.12 markus 1406: /* Try to load the file with empty passphrase. */
1.252 djm 1407: r = sshkey_load_private(identity_file, "", &private, &comment);
1408: if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.12 markus 1409: if (identity_passphrase)
1410: old_passphrase = xstrdup(identity_passphrase);
1411: else
1.65 markus 1412: old_passphrase =
1413: read_passphrase("Enter old passphrase: ",
1414: RP_ALLOW_STDIN);
1.252 djm 1415: r = sshkey_load_private(identity_file, old_passphrase,
1416: &private, &comment);
1.399 jsg 1417: freezero(old_passphrase, strlen(old_passphrase));
1.252 djm 1418: if (r != 0)
1419: goto badkey;
1420: } else if (r != 0) {
1421: badkey:
1.421 djm 1422: fatal_r(r, "Failed to load key %s", identity_file);
1.12 markus 1423: }
1.266 djm 1424: if (comment)
1.294 djm 1425: mprintf("Key has comment '%s'\n", comment);
1.12 markus 1426:
1427: /* Ask the new passphrase (twice). */
1428: if (identity_new_passphrase) {
1429: passphrase1 = xstrdup(identity_new_passphrase);
1430: passphrase2 = NULL;
1431: } else {
1432: passphrase1 =
1.65 markus 1433: read_passphrase("Enter new passphrase (empty for no "
1434: "passphrase): ", RP_ALLOW_STDIN);
1435: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1436: RP_ALLOW_STDIN);
1.12 markus 1437:
1438: /* Verify that they are the same. */
1439: if (strcmp(passphrase1, passphrase2) != 0) {
1.240 djm 1440: explicit_bzero(passphrase1, strlen(passphrase1));
1441: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1442: free(passphrase1);
1443: free(passphrase2);
1.12 markus 1444: printf("Pass phrases do not match. Try again.\n");
1445: exit(1);
1446: }
1447: /* Destroy the other copy. */
1.399 jsg 1448: freezero(passphrase2, strlen(passphrase2));
1.12 markus 1449: }
1450:
1451: /* Save the file using the new passphrase. */
1.252 djm 1452: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 1453: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 1454: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1455: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1456: sshkey_free(private);
1.227 djm 1457: free(comment);
1.12 markus 1458: exit(1);
1459: }
1460: /* Destroy the passphrase and the copy of the key in memory. */
1.399 jsg 1461: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1462: sshkey_free(private); /* Destroys contents */
1.227 djm 1463: free(comment);
1.1 deraadt 1464:
1.12 markus 1465: printf("Your identification has been saved with the new passphrase.\n");
1466: exit(0);
1.1 deraadt 1467: }
1468:
1.105 jakob 1469: /*
1470: * Print the SSHFP RR.
1471: */
1.138 jakob 1472: static int
1.325 djm 1473: do_print_resource_record(struct passwd *pw, char *fname, char *hname,
1.462 djm 1474: int print_generic, char * const *opts, size_t nopts)
1.105 jakob 1475: {
1.252 djm 1476: struct sshkey *public;
1.105 jakob 1477: char *comment = NULL;
1478: struct stat st;
1.462 djm 1479: int r, hash = -1;
1480: size_t i;
1.105 jakob 1481:
1.462 djm 1482: for (i = 0; i < nopts; i++) {
1483: if (strncasecmp(opts[i], "hashalg=", 8) == 0) {
1484: if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1)
1485: fatal("Unsupported hash algorithm");
1486: } else {
1487: error("Invalid option \"%s\"", opts[i]);
1488: return SSH_ERR_INVALID_ARGUMENT;
1489: }
1490: }
1.138 jakob 1491: if (fname == NULL)
1.421 djm 1492: fatal_f("no filename");
1.333 deraadt 1493: if (stat(fname, &st) == -1) {
1.138 jakob 1494: if (errno == ENOENT)
1495: return 0;
1.269 djm 1496: fatal("%s: %s", fname, strerror(errno));
1.105 jakob 1497: }
1.269 djm 1498: if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1.421 djm 1499: fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);
1.462 djm 1500: export_dns_rr(hname, public, stdout, print_generic, hash);
1.252 djm 1501: sshkey_free(public);
1502: free(comment);
1503: return 1;
1.105 jakob 1504: }
1505:
1.13 deraadt 1506: /*
1507: * Change the comment of a private key file.
1508: */
1.63 itojun 1509: static void
1.325 djm 1510: do_change_comment(struct passwd *pw, const char *identity_comment)
1.1 deraadt 1511: {
1.46 deraadt 1512: char new_comment[1024], *comment, *passphrase;
1.252 djm 1513: struct sshkey *private;
1514: struct sshkey *public;
1.12 markus 1515: struct stat st;
1.409 djm 1516: int r;
1.12 markus 1517:
1518: if (!have_identity)
1519: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1520: if (stat(identity_file, &st) == -1)
1.269 djm 1521: fatal("%s: %s", identity_file, strerror(errno));
1.252 djm 1522: if ((r = sshkey_load_private(identity_file, "",
1523: &private, &comment)) == 0)
1524: passphrase = xstrdup("");
1.269 djm 1525: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 1526: fatal_r(r, "Cannot load private key \"%s\"", identity_file);
1.269 djm 1527: else {
1.12 markus 1528: if (identity_passphrase)
1529: passphrase = xstrdup(identity_passphrase);
1530: else if (identity_new_passphrase)
1531: passphrase = xstrdup(identity_new_passphrase);
1532: else
1.65 markus 1533: passphrase = read_passphrase("Enter passphrase: ",
1534: RP_ALLOW_STDIN);
1.12 markus 1535: /* Try to load using the passphrase. */
1.252 djm 1536: if ((r = sshkey_load_private(identity_file, passphrase,
1537: &private, &comment)) != 0) {
1.399 jsg 1538: freezero(passphrase, strlen(passphrase));
1.421 djm 1539: fatal_r(r, "Cannot load private key \"%s\"",
1540: identity_file);
1.12 markus 1541: }
1542: }
1.283 halex 1543:
1.313 markus 1544: if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
1.336 djm 1545: private_key_format != SSHKEY_PRIVATE_OPENSSH) {
1.302 djm 1546: error("Comments are only supported for keys stored in "
1.283 halex 1547: "the new format (-o).");
1.268 tobias 1548: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1549: sshkey_free(private);
1.52 markus 1550: exit(1);
1.86 deraadt 1551: }
1.293 millert 1552: if (comment)
1.330 lum 1553: printf("Old comment: %s\n", comment);
1.293 millert 1554: else
1.330 lum 1555: printf("No existing comment\n");
1.12 markus 1556:
1557: if (identity_comment) {
1558: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1559: } else {
1.330 lum 1560: printf("New comment: ");
1.12 markus 1561: fflush(stdout);
1562: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1.240 djm 1563: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1564: sshkey_free(private);
1.12 markus 1565: exit(1);
1566: }
1.162 gilles 1567: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1568: }
1.330 lum 1569: if (comment != NULL && strcmp(comment, new_comment) == 0) {
1570: printf("No change to comment\n");
1571: free(passphrase);
1572: sshkey_free(private);
1573: free(comment);
1574: exit(0);
1575: }
1.12 markus 1576:
1577: /* Save the file using the new passphrase. */
1.252 djm 1578: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 1579: new_comment, private_key_format, openssh_format_cipher,
1580: rounds)) != 0) {
1.421 djm 1581: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1582: freezero(passphrase, strlen(passphrase));
1.252 djm 1583: sshkey_free(private);
1.227 djm 1584: free(comment);
1.12 markus 1585: exit(1);
1586: }
1.399 jsg 1587: freezero(passphrase, strlen(passphrase));
1.252 djm 1588: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1589: fatal_fr(r, "sshkey_from_private");
1.252 djm 1590: sshkey_free(private);
1.12 markus 1591:
1592: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 1593: if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)
1594: fatal_r(r, "Unable to save public key to %s", identity_file);
1.252 djm 1595: sshkey_free(public);
1.227 djm 1596: free(comment);
1.1 deraadt 1597:
1.330 lum 1598: if (strlen(new_comment) > 0)
1599: printf("Comment '%s' applied\n", new_comment);
1600: else
1601: printf("Comment removed\n");
1602:
1.12 markus 1603: exit(0);
1.1 deraadt 1604: }
1605:
1.179 djm 1606: static void
1.415 djm 1607: cert_ext_add(const char *key, const char *value, int iscrit)
1.179 djm 1608: {
1.415 djm 1609: cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));
1610: cert_ext[ncert_ext].key = xstrdup(key);
1611: cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);
1612: cert_ext[ncert_ext].crit = iscrit;
1613: ncert_ext++;
1.179 djm 1614: }
1615:
1.415 djm 1616: /* qsort(3) comparison function for certificate extensions */
1617: static int
1618: cert_ext_cmp(const void *_a, const void *_b)
1.179 djm 1619: {
1.415 djm 1620: const struct cert_ext *a = (const struct cert_ext *)_a;
1621: const struct cert_ext *b = (const struct cert_ext *)_b;
1.252 djm 1622: int r;
1.179 djm 1623:
1.415 djm 1624: if (a->crit != b->crit)
1625: return (a->crit < b->crit) ? -1 : 1;
1626: if ((r = strcmp(a->key, b->key)) != 0)
1627: return r;
1628: if ((a->val == NULL) != (b->val == NULL))
1629: return (a->val == NULL) ? -1 : 1;
1630: if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)
1631: return r;
1632: return 0;
1.179 djm 1633: }
1634:
1.190 djm 1635: #define OPTIONS_CRITICAL 1
1636: #define OPTIONS_EXTENSIONS 2
1.179 djm 1637: static void
1.252 djm 1638: prepare_options_buf(struct sshbuf *c, int which)
1.179 djm 1639: {
1.415 djm 1640: struct sshbuf *b;
1.300 djm 1641: size_t i;
1.415 djm 1642: int r;
1643: const struct cert_ext *ext;
1.300 djm 1644:
1.415 djm 1645: if ((b = sshbuf_new()) == NULL)
1.421 djm 1646: fatal_f("sshbuf_new failed");
1.252 djm 1647: sshbuf_reset(c);
1.415 djm 1648: for (i = 0; i < ncert_ext; i++) {
1649: ext = &cert_ext[i];
1650: if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||
1651: (!ext->crit && (which & OPTIONS_CRITICAL)))
1.300 djm 1652: continue;
1.415 djm 1653: if (ext->val == NULL) {
1654: /* flag option */
1.421 djm 1655: debug3_f("%s", ext->key);
1.415 djm 1656: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1657: (r = sshbuf_put_string(c, NULL, 0)) != 0)
1.421 djm 1658: fatal_fr(r, "prepare flag");
1.415 djm 1659: } else {
1660: /* key/value option */
1.421 djm 1661: debug3_f("%s=%s", ext->key, ext->val);
1.415 djm 1662: sshbuf_reset(b);
1663: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1664: (r = sshbuf_put_cstring(b, ext->val)) != 0 ||
1665: (r = sshbuf_put_stringb(c, b)) != 0)
1.421 djm 1666: fatal_fr(r, "prepare k/v");
1.300 djm 1667: }
1668: }
1.415 djm 1669: sshbuf_free(b);
1670: }
1671:
1672: static void
1673: finalise_cert_exts(void)
1674: {
1675: /* critical options */
1676: if (certflags_command != NULL)
1677: cert_ext_add("force-command", certflags_command, 1);
1678: if (certflags_src_addr != NULL)
1679: cert_ext_add("source-address", certflags_src_addr, 1);
1.453 naddy 1680: if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0)
1681: cert_ext_add("verify-required", NULL, 1);
1.415 djm 1682: /* extensions */
1683: if ((certflags_flags & CERTOPT_X_FWD) != 0)
1684: cert_ext_add("permit-X11-forwarding", NULL, 0);
1685: if ((certflags_flags & CERTOPT_AGENT_FWD) != 0)
1686: cert_ext_add("permit-agent-forwarding", NULL, 0);
1687: if ((certflags_flags & CERTOPT_PORT_FWD) != 0)
1688: cert_ext_add("permit-port-forwarding", NULL, 0);
1689: if ((certflags_flags & CERTOPT_PTY) != 0)
1690: cert_ext_add("permit-pty", NULL, 0);
1691: if ((certflags_flags & CERTOPT_USER_RC) != 0)
1692: cert_ext_add("permit-user-rc", NULL, 0);
1693: if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
1694: cert_ext_add("no-touch-required", NULL, 0);
1695: /* order lexically by key */
1696: if (ncert_ext > 0)
1697: qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp);
1.179 djm 1698: }
1699:
1.252 djm 1700: static struct sshkey *
1.197 djm 1701: load_pkcs11_key(char *path)
1702: {
1703: #ifdef ENABLE_PKCS11
1.252 djm 1704: struct sshkey **keys = NULL, *public, *private = NULL;
1705: int r, i, nkeys;
1.197 djm 1706:
1.252 djm 1707: if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1.421 djm 1708: fatal_r(r, "Couldn't load CA public key \"%s\"", path);
1.197 djm 1709:
1.392 djm 1710: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,
1711: &keys, NULL);
1.421 djm 1712: debug3_f("%d keys", nkeys);
1.197 djm 1713: if (nkeys <= 0)
1714: fatal("cannot read public key from pkcs11");
1715: for (i = 0; i < nkeys; i++) {
1.252 djm 1716: if (sshkey_equal_public(public, keys[i])) {
1.197 djm 1717: private = keys[i];
1718: continue;
1719: }
1.252 djm 1720: sshkey_free(keys[i]);
1.197 djm 1721: }
1.227 djm 1722: free(keys);
1.252 djm 1723: sshkey_free(public);
1.197 djm 1724: return private;
1725: #else
1726: fatal("no pkcs11 support");
1727: #endif /* ENABLE_PKCS11 */
1728: }
1729:
1.305 djm 1730: /* Signer for sshkey_certify_custom that uses the agent */
1731: static int
1.332 djm 1732: agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
1.305 djm 1733: const u_char *data, size_t datalen,
1.416 djm 1734: const char *alg, const char *provider, const char *pin,
1735: u_int compat, void *ctx)
1.305 djm 1736: {
1737: int *agent_fdp = (int *)ctx;
1738:
1739: return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
1740: data, datalen, alg, compat);
1741: }
1742:
1.179 djm 1743: static void
1.325 djm 1744: do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
1.326 djm 1745: unsigned long long cert_serial, int cert_serial_autoinc,
1746: int argc, char **argv)
1.179 djm 1747: {
1.409 djm 1748: int r, i, found, agent_fd = -1;
1.179 djm 1749: u_int n;
1.252 djm 1750: struct sshkey *ca, *public;
1.374 djm 1751: char valid[64], *otmp, *tmp, *cp, *out, *comment;
1.416 djm 1752: char *ca_fp = NULL, **plist = NULL, *pin = NULL;
1.305 djm 1753: struct ssh_identitylist *agent_ids;
1754: size_t j;
1.374 djm 1755: struct notifier_ctx *notifier = NULL;
1.186 djm 1756:
1.246 markus 1757: #ifdef ENABLE_PKCS11
1.197 djm 1758: pkcs11_init(1);
1.246 markus 1759: #endif
1.197 djm 1760: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1761: if (pkcs11provider != NULL) {
1.305 djm 1762: /* If a PKCS#11 token was specified then try to use it */
1.197 djm 1763: if ((ca = load_pkcs11_key(tmp)) == NULL)
1764: fatal("No PKCS#11 key matching %s found", ca_key_path);
1.305 djm 1765: } else if (prefer_agent) {
1766: /*
1767: * Agent signature requested. Try to use agent after making
1768: * sure the public key specified is actually present in the
1769: * agent.
1770: */
1771: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 1772: fatal_r(r, "Cannot load CA public key %s", tmp);
1.305 djm 1773: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
1.421 djm 1774: fatal_r(r, "Cannot use public key for CA signature");
1.305 djm 1775: if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
1.421 djm 1776: fatal_r(r, "Retrieve agent key list");
1.305 djm 1777: found = 0;
1778: for (j = 0; j < agent_ids->nkeys; j++) {
1779: if (sshkey_equal(ca, agent_ids->keys[j])) {
1780: found = 1;
1781: break;
1782: }
1783: }
1784: if (!found)
1785: fatal("CA key %s not found in agent", tmp);
1786: ssh_free_identitylist(agent_ids);
1787: ca->flags |= SSHKEY_FLAG_EXT;
1788: } else {
1789: /* CA key is assumed to be a private key on the filesystem */
1.341 djm 1790: ca = load_identity(tmp, NULL);
1.416 djm 1791: if (sshkey_is_sk(ca) &&
1792: (ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
1793: if ((pin = read_passphrase("Enter PIN for CA key: ",
1794: RP_ALLOW_STDIN)) == NULL)
1.421 djm 1795: fatal_f("couldn't read PIN");
1.416 djm 1796: }
1.305 djm 1797: }
1.227 djm 1798: free(tmp);
1.197 djm 1799:
1.390 djm 1800: if (key_type_name != NULL) {
1801: if (sshkey_type_from_name(key_type_name) != ca->type) {
1802: fatal("CA key type %s doesn't match specified %s",
1803: sshkey_ssh_name(ca), key_type_name);
1804: }
1805: } else if (ca->type == KEY_RSA) {
1806: /* Default to a good signature algorithm */
1807: key_type_name = "rsa-sha2-512";
1.290 djm 1808: }
1.374 djm 1809: ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
1.290 djm 1810:
1.415 djm 1811: finalise_cert_exts();
1.179 djm 1812: for (i = 0; i < argc; i++) {
1813: /* Split list of principals */
1814: n = 0;
1815: if (cert_principals != NULL) {
1816: otmp = tmp = xstrdup(cert_principals);
1817: plist = NULL;
1818: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1.270 deraadt 1819: plist = xreallocarray(plist, n + 1, sizeof(*plist));
1.179 djm 1820: if (*(plist[n] = xstrdup(cp)) == '\0')
1821: fatal("Empty principal name");
1822: }
1.227 djm 1823: free(otmp);
1.179 djm 1824: }
1.312 djm 1825: if (n > SSHKEY_CERT_MAX_PRINCIPALS)
1826: fatal("Too many certificate principals specified");
1.337 djm 1827:
1.179 djm 1828: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1.252 djm 1829: if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1.421 djm 1830: fatal_r(r, "load pubkey \"%s\"", tmp);
1.366 djm 1831: if (sshkey_is_cert(public))
1.421 djm 1832: fatal_f("key \"%s\" type %s cannot be certified",
1833: tmp, sshkey_type(public));
1.179 djm 1834:
1835: /* Prepare certificate to sign */
1.275 djm 1836: if ((r = sshkey_to_certified(public)) != 0)
1.421 djm 1837: fatal_r(r, "Could not upgrade key %s to certificate", tmp);
1.179 djm 1838: public->cert->type = cert_key_type;
1.186 djm 1839: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1840: public->cert->key_id = xstrdup(cert_key_id);
1841: public->cert->nprincipals = n;
1842: public->cert->principals = plist;
1843: public->cert->valid_after = cert_valid_from;
1844: public->cert->valid_before = cert_valid_to;
1.275 djm 1845: prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1846: prepare_options_buf(public->cert->extensions,
1847: OPTIONS_EXTENSIONS);
1.252 djm 1848: if ((r = sshkey_from_private(ca,
1849: &public->cert->signature_key)) != 0)
1.421 djm 1850: fatal_r(r, "sshkey_from_private (ca key)");
1.179 djm 1851:
1.305 djm 1852: if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
1853: if ((r = sshkey_certify_custom(public, ca,
1.416 djm 1854: key_type_name, sk_provider, NULL, agent_signer,
1.358 djm 1855: &agent_fd)) != 0)
1.421 djm 1856: fatal_r(r, "Couldn't certify %s via agent", tmp);
1.305 djm 1857: } else {
1.374 djm 1858: if (sshkey_is_sk(ca) &&
1859: (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
1860: notifier = notify_start(0,
1861: "Confirm user presence for key %s %s",
1862: sshkey_type(ca), ca_fp);
1863: }
1864: r = sshkey_certify(public, ca, key_type_name,
1.416 djm 1865: sk_provider, pin);
1.424 djm 1866: notify_complete(notifier, "User presence confirmed");
1.374 djm 1867: if (r != 0)
1.421 djm 1868: fatal_r(r, "Couldn't certify key %s", tmp);
1.305 djm 1869: }
1.179 djm 1870:
1871: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1872: *cp = '\0';
1873: xasprintf(&out, "%s-cert.pub", tmp);
1.227 djm 1874: free(tmp);
1.179 djm 1875:
1.409 djm 1876: if ((r = sshkey_save_public(public, out, comment)) != 0) {
1.421 djm 1877: fatal_r(r, "Unable to save public key to %s",
1878: identity_file);
1.409 djm 1879: }
1.179 djm 1880:
1.186 djm 1881: if (!quiet) {
1.282 djm 1882: sshkey_format_cert_validity(public->cert,
1.281 djm 1883: valid, sizeof(valid));
1.186 djm 1884: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1.282 djm 1885: "valid %s", sshkey_cert_type(public),
1.205 djm 1886: out, public->cert->key_id,
1887: (unsigned long long)public->cert->serial,
1.179 djm 1888: cert_principals != NULL ? " for " : "",
1889: cert_principals != NULL ? cert_principals : "",
1.281 djm 1890: valid);
1.186 djm 1891: }
1.179 djm 1892:
1.252 djm 1893: sshkey_free(public);
1.227 djm 1894: free(out);
1.326 djm 1895: if (cert_serial_autoinc)
1896: cert_serial++;
1.179 djm 1897: }
1.416 djm 1898: if (pin != NULL)
1899: freezero(pin, strlen(pin));
1.374 djm 1900: free(ca_fp);
1.246 markus 1901: #ifdef ENABLE_PKCS11
1.197 djm 1902: pkcs11_terminate();
1.246 markus 1903: #endif
1.179 djm 1904: exit(0);
1905: }
1906:
1907: static u_int64_t
1908: parse_relative_time(const char *s, time_t now)
1909: {
1910: int64_t mul, secs;
1911:
1912: mul = *s == '-' ? -1 : 1;
1913:
1914: if ((secs = convtime(s + 1)) == -1)
1915: fatal("Invalid relative certificate time %s", s);
1916: if (mul == -1 && secs > now)
1917: fatal("Certificate time %s cannot be represented", s);
1918: return now + (u_int64_t)(secs * mul);
1919: }
1920:
1921: static void
1.459 djm 1922: parse_hex_u64(const char *s, uint64_t *up)
1923: {
1924: char *ep;
1925: unsigned long long ull;
1926:
1927: errno = 0;
1928: ull = strtoull(s, &ep, 16);
1929: if (*s == '\0' || *ep != '\0')
1930: fatal("Invalid certificate time: not a number");
1931: if (errno == ERANGE && ull == ULONG_MAX)
1932: fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time");
1933: *up = (uint64_t)ull;
1934: }
1935:
1936: static void
1.179 djm 1937: parse_cert_times(char *timespec)
1938: {
1939: char *from, *to;
1940: time_t now = time(NULL);
1941: int64_t secs;
1942:
1943: /* +timespec relative to now */
1944: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1945: if ((secs = convtime(timespec + 1)) == -1)
1946: fatal("Invalid relative certificate life %s", timespec);
1947: cert_valid_to = now + secs;
1948: /*
1949: * Backdate certificate one minute to avoid problems on hosts
1950: * with poorly-synchronised clocks.
1951: */
1952: cert_valid_from = ((now - 59)/ 60) * 60;
1953: return;
1954: }
1955:
1956: /*
1957: * from:to, where
1.459 djm 1958: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always"
1959: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever"
1.179 djm 1960: */
1961: from = xstrdup(timespec);
1962: to = strchr(from, ':');
1963: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1964: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1965: *to++ = '\0';
1966:
1967: if (*from == '-' || *from == '+')
1968: cert_valid_from = parse_relative_time(from, now);
1.308 djm 1969: else if (strcmp(from, "always") == 0)
1970: cert_valid_from = 0;
1.459 djm 1971: else if (strncmp(from, "0x", 2) == 0)
1972: parse_hex_u64(from, &cert_valid_from);
1.314 djm 1973: else if (parse_absolute_time(from, &cert_valid_from) != 0)
1974: fatal("Invalid from time \"%s\"", from);
1.179 djm 1975:
1976: if (*to == '-' || *to == '+')
1.235 djm 1977: cert_valid_to = parse_relative_time(to, now);
1.308 djm 1978: else if (strcmp(to, "forever") == 0)
1979: cert_valid_to = ~(u_int64_t)0;
1.460 djm 1980: else if (strncmp(to, "0x", 2) == 0)
1.459 djm 1981: parse_hex_u64(to, &cert_valid_to);
1.314 djm 1982: else if (parse_absolute_time(to, &cert_valid_to) != 0)
1983: fatal("Invalid to time \"%s\"", to);
1.179 djm 1984:
1985: if (cert_valid_to <= cert_valid_from)
1986: fatal("Empty certificate validity interval");
1.227 djm 1987: free(from);
1.179 djm 1988: }
1989:
1990: static void
1.186 djm 1991: add_cert_option(char *opt)
1.179 djm 1992: {
1.300 djm 1993: char *val, *cp;
1994: int iscrit = 0;
1.179 djm 1995:
1.208 stevesk 1996: if (strcasecmp(opt, "clear") == 0)
1.190 djm 1997: certflags_flags = 0;
1.179 djm 1998: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1999: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 2000: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 2001: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 2002: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 2003: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 2004: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 2005: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 2006: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 2007: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 2008: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 2009: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 2010: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 2011: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 2012: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 2013: certflags_flags |= CERTOPT_PTY;
1.179 djm 2014: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 2015: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 2016: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 2017: certflags_flags |= CERTOPT_USER_RC;
1.371 djm 2018: else if (strcasecmp(opt, "touch-required") == 0)
2019: certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
2020: else if (strcasecmp(opt, "no-touch-required") == 0)
2021: certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
1.453 naddy 2022: else if (strcasecmp(opt, "no-verify-required") == 0)
2023: certflags_flags &= ~CERTOPT_REQUIRE_VERIFY;
2024: else if (strcasecmp(opt, "verify-required") == 0)
2025: certflags_flags |= CERTOPT_REQUIRE_VERIFY;
1.179 djm 2026: else if (strncasecmp(opt, "force-command=", 14) == 0) {
2027: val = opt + 14;
2028: if (*val == '\0')
1.186 djm 2029: fatal("Empty force-command option");
1.190 djm 2030: if (certflags_command != NULL)
1.179 djm 2031: fatal("force-command already specified");
1.190 djm 2032: certflags_command = xstrdup(val);
1.179 djm 2033: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
2034: val = opt + 15;
2035: if (*val == '\0')
1.186 djm 2036: fatal("Empty source-address option");
1.190 djm 2037: if (certflags_src_addr != NULL)
1.179 djm 2038: fatal("source-address already specified");
2039: if (addr_match_cidr_list(NULL, val) != 0)
2040: fatal("Invalid source-address list");
1.190 djm 2041: certflags_src_addr = xstrdup(val);
1.300 djm 2042: } else if (strncasecmp(opt, "extension:", 10) == 0 ||
1.429 djm 2043: (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
1.300 djm 2044: val = xstrdup(strchr(opt, ':') + 1);
2045: if ((cp = strchr(val, '=')) != NULL)
2046: *cp++ = '\0';
1.415 djm 2047: cert_ext_add(val, cp, iscrit);
2048: free(val);
1.179 djm 2049: } else
1.186 djm 2050: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 2051: }
2052:
1.63 itojun 2053: static void
1.275 djm 2054: show_options(struct sshbuf *optbuf, int in_critical)
1.192 djm 2055: {
1.415 djm 2056: char *name, *arg, *hex;
1.252 djm 2057: struct sshbuf *options, *option = NULL;
2058: int r;
2059:
2060: if ((options = sshbuf_fromb(optbuf)) == NULL)
1.421 djm 2061: fatal_f("sshbuf_fromb failed");
1.252 djm 2062: while (sshbuf_len(options) != 0) {
2063: sshbuf_free(option);
2064: option = NULL;
2065: if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
2066: (r = sshbuf_froms(options, &option)) != 0)
1.421 djm 2067: fatal_fr(r, "parse option");
1.192 djm 2068: printf(" %s", name);
1.275 djm 2069: if (!in_critical &&
1.192 djm 2070: (strcmp(name, "permit-X11-forwarding") == 0 ||
2071: strcmp(name, "permit-agent-forwarding") == 0 ||
2072: strcmp(name, "permit-port-forwarding") == 0 ||
2073: strcmp(name, "permit-pty") == 0 ||
1.371 djm 2074: strcmp(name, "permit-user-rc") == 0 ||
2075: strcmp(name, "no-touch-required") == 0)) {
1.192 djm 2076: printf("\n");
1.371 djm 2077: } else if (in_critical &&
1.192 djm 2078: (strcmp(name, "force-command") == 0 ||
2079: strcmp(name, "source-address") == 0)) {
1.252 djm 2080: if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1.421 djm 2081: fatal_fr(r, "parse critical");
1.245 djm 2082: printf(" %s\n", arg);
2083: free(arg);
1.453 naddy 2084: } else if (in_critical &&
2085: strcmp(name, "verify-required") == 0) {
2086: printf("\n");
1.415 djm 2087: } else if (sshbuf_len(option) > 0) {
2088: hex = sshbuf_dtob16(option);
2089: printf(" UNKNOWN OPTION: %s (len %zu)\n",
2090: hex, sshbuf_len(option));
1.252 djm 2091: sshbuf_reset(option);
1.415 djm 2092: free(hex);
2093: } else
2094: printf(" UNKNOWN FLAG OPTION\n");
1.227 djm 2095: free(name);
1.252 djm 2096: if (sshbuf_len(option) != 0)
1.192 djm 2097: fatal("Option corrupt: extra data at end");
2098: }
1.252 djm 2099: sshbuf_free(option);
2100: sshbuf_free(options);
1.192 djm 2101: }
2102:
2103: static void
1.278 djm 2104: print_cert(struct sshkey *key)
1.182 djm 2105: {
1.281 djm 2106: char valid[64], *key_fp, *ca_fp;
1.275 djm 2107: u_int i;
1.186 djm 2108:
1.252 djm 2109: key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
2110: ca_fp = sshkey_fingerprint(key->cert->signature_key,
1.251 djm 2111: fingerprint_hash, SSH_FP_DEFAULT);
1.259 djm 2112: if (key_fp == NULL || ca_fp == NULL)
1.421 djm 2113: fatal_f("sshkey_fingerprint fail");
1.281 djm 2114: sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1.182 djm 2115:
1.252 djm 2116: printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
2117: sshkey_cert_type(key));
2118: printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1.323 djm 2119: printf(" Signing CA: %s %s (using %s)\n",
2120: sshkey_type(key->cert->signature_key), ca_fp,
2121: key->cert->signature_type);
1.186 djm 2122: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1.275 djm 2123: printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1.281 djm 2124: printf(" Valid: %s\n", valid);
1.182 djm 2125: printf(" Principals: ");
2126: if (key->cert->nprincipals == 0)
2127: printf("(none)\n");
2128: else {
2129: for (i = 0; i < key->cert->nprincipals; i++)
2130: printf("\n %s",
2131: key->cert->principals[i]);
2132: printf("\n");
2133: }
1.186 djm 2134: printf(" Critical Options: ");
1.252 djm 2135: if (sshbuf_len(key->cert->critical) == 0)
1.182 djm 2136: printf("(none)\n");
2137: else {
2138: printf("\n");
1.275 djm 2139: show_options(key->cert->critical, 1);
1.186 djm 2140: }
1.275 djm 2141: printf(" Extensions: ");
2142: if (sshbuf_len(key->cert->extensions) == 0)
2143: printf("(none)\n");
2144: else {
2145: printf("\n");
2146: show_options(key->cert->extensions, 0);
1.182 djm 2147: }
1.278 djm 2148: }
2149:
2150: static void
2151: do_show_cert(struct passwd *pw)
2152: {
2153: struct sshkey *key = NULL;
2154: struct stat st;
2155: int r, is_stdin = 0, ok = 0;
2156: FILE *f;
1.317 markus 2157: char *cp, *line = NULL;
1.278 djm 2158: const char *path;
1.317 markus 2159: size_t linesize = 0;
1.289 djm 2160: u_long lnum = 0;
1.278 djm 2161:
2162: if (!have_identity)
2163: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 2164: if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
1.278 djm 2165: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
2166:
2167: path = identity_file;
2168: if (strcmp(path, "-") == 0) {
2169: f = stdin;
2170: path = "(stdin)";
2171: is_stdin = 1;
2172: } else if ((f = fopen(identity_file, "r")) == NULL)
2173: fatal("fopen %s: %s", identity_file, strerror(errno));
2174:
1.317 markus 2175: while (getline(&line, &linesize, f) != -1) {
2176: lnum++;
1.278 djm 2177: sshkey_free(key);
2178: key = NULL;
2179: /* Trim leading space and comments */
2180: cp = line + strspn(line, " \t");
2181: if (*cp == '#' || *cp == '\0')
2182: continue;
2183: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2184: fatal("sshkey_new");
1.278 djm 2185: if ((r = sshkey_read(key, &cp)) != 0) {
1.421 djm 2186: error_r(r, "%s:%lu: invalid key", path, lnum);
1.278 djm 2187: continue;
2188: }
2189: if (!sshkey_is_cert(key)) {
2190: error("%s:%lu is not a certificate", path, lnum);
2191: continue;
2192: }
2193: ok = 1;
2194: if (!is_stdin && lnum == 1)
2195: printf("%s:\n", path);
2196: else
2197: printf("%s:%lu:\n", path, lnum);
2198: print_cert(key);
2199: }
1.317 markus 2200: free(line);
1.278 djm 2201: sshkey_free(key);
2202: fclose(f);
2203: exit(ok ? 0 : 1);
1.182 djm 2204: }
2205:
2206: static void
1.223 djm 2207: load_krl(const char *path, struct ssh_krl **krlp)
2208: {
1.252 djm 2209: struct sshbuf *krlbuf;
1.393 djm 2210: int r;
1.223 djm 2211:
1.393 djm 2212: if ((r = sshbuf_load_file(path, &krlbuf)) != 0)
1.421 djm 2213: fatal_r(r, "Unable to load KRL %s", path);
1.223 djm 2214: /* XXX check sigs */
1.470 djm 2215: if ((r = ssh_krl_from_blob(krlbuf, krlp)) != 0 ||
1.223 djm 2216: *krlp == NULL)
1.421 djm 2217: fatal_r(r, "Invalid KRL file %s", path);
1.252 djm 2218: sshbuf_free(krlbuf);
1.223 djm 2219: }
2220:
2221: static void
1.320 djm 2222: hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
2223: const char *file, u_long lnum)
2224: {
2225: char *tmp;
2226: size_t tlen;
2227: struct sshbuf *b;
2228: int r;
2229:
2230: if (strncmp(cp, "SHA256:", 7) != 0)
2231: fatal("%s:%lu: unsupported hash algorithm", file, lnum);
2232: cp += 7;
2233:
2234: /*
2235: * OpenSSH base64 hashes omit trailing '='
2236: * characters; put them back for decode.
2237: */
1.469 djm 2238: if ((tlen = strlen(cp)) >= SIZE_MAX - 5)
2239: fatal_f("hash too long: %zu bytes", tlen);
1.320 djm 2240: tmp = xmalloc(tlen + 4 + 1);
2241: strlcpy(tmp, cp, tlen + 1);
2242: while ((tlen % 4) != 0) {
2243: tmp[tlen++] = '=';
2244: tmp[tlen] = '\0';
2245: }
2246: if ((b = sshbuf_new()) == NULL)
1.421 djm 2247: fatal_f("sshbuf_new failed");
1.320 djm 2248: if ((r = sshbuf_b64tod(b, tmp)) != 0)
1.421 djm 2249: fatal_r(r, "%s:%lu: decode hash failed", file, lnum);
1.320 djm 2250: free(tmp);
2251: *lenp = sshbuf_len(b);
2252: *blobp = xmalloc(*lenp);
2253: memcpy(*blobp, sshbuf_ptr(b), *lenp);
2254: sshbuf_free(b);
2255: }
2256:
2257: static void
1.261 djm 2258: update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1.252 djm 2259: const struct sshkey *ca, struct ssh_krl *krl)
1.223 djm 2260: {
1.252 djm 2261: struct sshkey *key = NULL;
1.223 djm 2262: u_long lnum = 0;
1.317 markus 2263: char *path, *cp, *ep, *line = NULL;
1.320 djm 2264: u_char *blob = NULL;
2265: size_t blen = 0, linesize = 0;
1.223 djm 2266: unsigned long long serial, serial2;
1.320 djm 2267: int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
1.223 djm 2268: FILE *krl_spec;
2269:
2270: path = tilde_expand_filename(file, pw->pw_uid);
2271: if (strcmp(path, "-") == 0) {
2272: krl_spec = stdin;
2273: free(path);
2274: path = xstrdup("(standard input)");
2275: } else if ((krl_spec = fopen(path, "r")) == NULL)
2276: fatal("fopen %s: %s", path, strerror(errno));
2277:
2278: if (!quiet)
2279: printf("Revoking from %s\n", path);
1.317 markus 2280: while (getline(&line, &linesize, krl_spec) != -1) {
1.469 djm 2281: if (linesize >= INT_MAX) {
2282: fatal_f("%s contains unparsable line, len=%zu",
2283: path, linesize);
2284: }
1.317 markus 2285: lnum++;
1.320 djm 2286: was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
1.223 djm 2287: cp = line + strspn(line, " \t");
2288: /* Trim trailing space, comments and strip \n */
2289: for (i = 0, r = -1; cp[i] != '\0'; i++) {
2290: if (cp[i] == '#' || cp[i] == '\n') {
2291: cp[i] = '\0';
2292: break;
2293: }
2294: if (cp[i] == ' ' || cp[i] == '\t') {
2295: /* Remember the start of a span of whitespace */
2296: if (r == -1)
2297: r = i;
2298: } else
2299: r = -1;
2300: }
2301: if (r != -1)
2302: cp[r] = '\0';
2303: if (*cp == '\0')
2304: continue;
2305: if (strncasecmp(cp, "serial:", 7) == 0) {
1.261 djm 2306: if (ca == NULL && !wild_ca) {
1.231 djm 2307: fatal("revoking certificates by serial number "
1.223 djm 2308: "requires specification of a CA key");
2309: }
2310: cp += 7;
2311: cp = cp + strspn(cp, " \t");
2312: errno = 0;
2313: serial = strtoull(cp, &ep, 0);
2314: if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2315: fatal("%s:%lu: invalid serial \"%s\"",
2316: path, lnum, cp);
2317: if (errno == ERANGE && serial == ULLONG_MAX)
2318: fatal("%s:%lu: serial out of range",
2319: path, lnum);
2320: serial2 = serial;
2321: if (*ep == '-') {
2322: cp = ep + 1;
2323: errno = 0;
2324: serial2 = strtoull(cp, &ep, 0);
2325: if (*cp == '\0' || *ep != '\0')
2326: fatal("%s:%lu: invalid serial \"%s\"",
2327: path, lnum, cp);
2328: if (errno == ERANGE && serial2 == ULLONG_MAX)
2329: fatal("%s:%lu: serial out of range",
2330: path, lnum);
2331: if (serial2 <= serial)
2332: fatal("%s:%lu: invalid serial range "
2333: "%llu:%llu", path, lnum,
2334: (unsigned long long)serial,
2335: (unsigned long long)serial2);
2336: }
2337: if (ssh_krl_revoke_cert_by_serial_range(krl,
2338: ca, serial, serial2) != 0) {
1.421 djm 2339: fatal_f("revoke serial failed");
1.223 djm 2340: }
2341: } else if (strncasecmp(cp, "id:", 3) == 0) {
1.261 djm 2342: if (ca == NULL && !wild_ca) {
1.232 djm 2343: fatal("revoking certificates by key ID "
1.223 djm 2344: "requires specification of a CA key");
2345: }
2346: cp += 3;
2347: cp = cp + strspn(cp, " \t");
2348: if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
1.421 djm 2349: fatal_f("revoke key ID failed");
1.320 djm 2350: } else if (strncasecmp(cp, "hash:", 5) == 0) {
2351: cp += 5;
2352: cp = cp + strspn(cp, " \t");
2353: hash_to_blob(cp, &blob, &blen, file, lnum);
2354: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
1.401 markus 2355: if (r != 0)
1.421 djm 2356: fatal_fr(r, "revoke key failed");
1.223 djm 2357: } else {
2358: if (strncasecmp(cp, "key:", 4) == 0) {
2359: cp += 4;
2360: cp = cp + strspn(cp, " \t");
2361: was_explicit_key = 1;
2362: } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2363: cp += 5;
2364: cp = cp + strspn(cp, " \t");
2365: was_sha1 = 1;
1.320 djm 2366: } else if (strncasecmp(cp, "sha256:", 7) == 0) {
2367: cp += 7;
2368: cp = cp + strspn(cp, " \t");
2369: was_sha256 = 1;
1.223 djm 2370: /*
2371: * Just try to process the line as a key.
2372: * Parsing will fail if it isn't.
2373: */
2374: }
1.252 djm 2375: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2376: fatal("sshkey_new");
1.252 djm 2377: if ((r = sshkey_read(key, &cp)) != 0)
1.421 djm 2378: fatal_r(r, "%s:%lu: invalid key", path, lnum);
1.223 djm 2379: if (was_explicit_key)
2380: r = ssh_krl_revoke_key_explicit(krl, key);
1.320 djm 2381: else if (was_sha1) {
2382: if (sshkey_fingerprint_raw(key,
2383: SSH_DIGEST_SHA1, &blob, &blen) != 0) {
2384: fatal("%s:%lu: fingerprint failed",
2385: file, lnum);
2386: }
2387: r = ssh_krl_revoke_key_sha1(krl, blob, blen);
2388: } else if (was_sha256) {
2389: if (sshkey_fingerprint_raw(key,
2390: SSH_DIGEST_SHA256, &blob, &blen) != 0) {
2391: fatal("%s:%lu: fingerprint failed",
2392: file, lnum);
2393: }
2394: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
2395: } else
1.223 djm 2396: r = ssh_krl_revoke_key(krl, key);
2397: if (r != 0)
1.421 djm 2398: fatal_fr(r, "revoke key failed");
1.320 djm 2399: freezero(blob, blen);
2400: blob = NULL;
2401: blen = 0;
1.252 djm 2402: sshkey_free(key);
1.223 djm 2403: }
2404: }
2405: if (strcmp(path, "-") != 0)
2406: fclose(krl_spec);
1.317 markus 2407: free(line);
1.226 djm 2408: free(path);
1.223 djm 2409: }
2410:
2411: static void
1.325 djm 2412: do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
2413: unsigned long long krl_version, const char *krl_comment,
2414: int argc, char **argv)
1.223 djm 2415: {
2416: struct ssh_krl *krl;
2417: struct stat sb;
1.252 djm 2418: struct sshkey *ca = NULL;
1.393 djm 2419: int i, r, wild_ca = 0;
1.223 djm 2420: char *tmp;
1.252 djm 2421: struct sshbuf *kbuf;
1.223 djm 2422:
2423: if (*identity_file == '\0')
2424: fatal("KRL generation requires an output file");
2425: if (stat(identity_file, &sb) == -1) {
2426: if (errno != ENOENT)
2427: fatal("Cannot access KRL \"%s\": %s",
2428: identity_file, strerror(errno));
2429: if (updating)
2430: fatal("KRL \"%s\" does not exist", identity_file);
2431: }
2432: if (ca_key_path != NULL) {
1.261 djm 2433: if (strcasecmp(ca_key_path, "none") == 0)
2434: wild_ca = 1;
2435: else {
2436: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2437: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 2438: fatal_r(r, "Cannot load CA public key %s", tmp);
1.261 djm 2439: free(tmp);
2440: }
1.223 djm 2441: }
2442:
2443: if (updating)
2444: load_krl(identity_file, &krl);
2445: else if ((krl = ssh_krl_init()) == NULL)
2446: fatal("couldn't create KRL");
2447:
1.325 djm 2448: if (krl_version != 0)
2449: ssh_krl_set_version(krl, krl_version);
2450: if (krl_comment != NULL)
2451: ssh_krl_set_comment(krl, krl_comment);
1.223 djm 2452:
2453: for (i = 0; i < argc; i++)
1.261 djm 2454: update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
1.223 djm 2455:
1.252 djm 2456: if ((kbuf = sshbuf_new()) == NULL)
2457: fatal("sshbuf_new failed");
1.470 djm 2458: if (ssh_krl_to_blob(krl, kbuf) != 0)
1.223 djm 2459: fatal("Couldn't generate KRL");
1.393 djm 2460: if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)
1.223 djm 2461: fatal("write %s: %s", identity_file, strerror(errno));
1.252 djm 2462: sshbuf_free(kbuf);
1.223 djm 2463: ssh_krl_free(krl);
1.286 mmcc 2464: sshkey_free(ca);
1.223 djm 2465: }
2466:
2467: static void
1.405 djm 2468: do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)
1.223 djm 2469: {
2470: int i, r, ret = 0;
2471: char *comment;
2472: struct ssh_krl *krl;
1.252 djm 2473: struct sshkey *k;
1.223 djm 2474:
2475: if (*identity_file == '\0')
2476: fatal("KRL checking requires an input file");
2477: load_krl(identity_file, &krl);
1.405 djm 2478: if (print_krl)
2479: krl_dump(krl, stdout);
1.223 djm 2480: for (i = 0; i < argc; i++) {
1.252 djm 2481: if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
1.421 djm 2482: fatal_r(r, "Cannot load public key %s", argv[i]);
1.223 djm 2483: r = ssh_krl_check_key(krl, k);
2484: printf("%s%s%s%s: %s\n", argv[i],
2485: *comment ? " (" : "", comment, *comment ? ")" : "",
2486: r == 0 ? "ok" : "REVOKED");
2487: if (r != 0)
2488: ret = 1;
1.252 djm 2489: sshkey_free(k);
1.223 djm 2490: free(comment);
2491: }
2492: ssh_krl_free(krl);
2493: exit(ret);
2494: }
2495:
1.344 djm 2496: static struct sshkey *
2497: load_sign_key(const char *keypath, const struct sshkey *pubkey)
2498: {
2499: size_t i, slen, plen = strlen(keypath);
2500: char *privpath = xstrdup(keypath);
1.448 djm 2501: static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
1.344 djm 2502: struct sshkey *ret = NULL, *privkey = NULL;
1.451 djm 2503: int r, waspub = 0;
2504: struct stat st;
1.344 djm 2505:
2506: /*
1.404 djm 2507: * If passed a public key filename, then try to locate the corresponding
1.344 djm 2508: * private key. This lets us specify certificates on the command-line
2509: * and have ssh-keygen find the appropriate private key.
2510: */
2511: for (i = 0; suffixes[i]; i++) {
2512: slen = strlen(suffixes[i]);
2513: if (plen <= slen ||
2514: strcmp(privpath + plen - slen, suffixes[i]) != 0)
2515: continue;
2516: privpath[plen - slen] = '\0';
1.421 djm 2517: debug_f("%s looks like a public key, using private key "
2518: "path %s instead", keypath, privpath);
1.451 djm 2519: waspub = 1;
1.344 djm 2520: }
1.451 djm 2521: if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
2522: fatal("No private key found for public key \"%s\"", keypath);
2523: if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
2524: (r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
2525: debug_fr(r, "load private key \"%s\"", privpath);
2526: fatal("No private key found for \"%s\"", privpath);
2527: } else if (privkey == NULL)
2528: privkey = load_identity(privpath, NULL);
2529:
1.344 djm 2530: if (!sshkey_equal_public(pubkey, privkey)) {
2531: error("Public key %s doesn't match private %s",
2532: keypath, privpath);
2533: goto done;
2534: }
2535: if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
2536: /*
2537: * Graft the certificate onto the private key to make
2538: * it capable of signing.
2539: */
2540: if ((r = sshkey_to_certified(privkey)) != 0) {
1.421 djm 2541: error_fr(r, "sshkey_to_certified");
1.344 djm 2542: goto done;
2543: }
2544: if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
1.421 djm 2545: error_fr(r, "sshkey_cert_copy");
1.344 djm 2546: goto done;
2547: }
2548: }
2549: /* success */
2550: ret = privkey;
2551: privkey = NULL;
2552: done:
2553: sshkey_free(privkey);
2554: free(privpath);
2555: return ret;
2556: }
2557:
2558: static int
2559: sign_one(struct sshkey *signkey, const char *filename, int fd,
1.445 djm 2560: const char *sig_namespace, const char *hashalg, sshsig_signer *signer,
2561: void *signer_ctx)
1.344 djm 2562: {
2563: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2564: int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
1.363 djm 2565: char *wfile = NULL, *asig = NULL, *fp = NULL;
1.416 djm 2566: char *pin = NULL, *prompt = NULL;
1.344 djm 2567:
2568: if (!quiet) {
2569: if (fd == STDIN_FILENO)
2570: fprintf(stderr, "Signing data on standard input\n");
2571: else
2572: fprintf(stderr, "Signing file %s\n", filename);
1.363 djm 2573: }
1.416 djm 2574: if (signer == NULL && sshkey_is_sk(signkey)) {
2575: if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
2576: xasprintf(&prompt, "Enter PIN for %s key: ",
2577: sshkey_type(signkey));
2578: if ((pin = read_passphrase(prompt,
2579: RP_ALLOW_STDIN)) == NULL)
1.421 djm 2580: fatal_f("couldn't read PIN");
1.416 djm 2581: }
2582: if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
2583: if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
2584: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2585: fatal_f("fingerprint failed");
1.416 djm 2586: fprintf(stderr, "Confirm user presence for key %s %s\n",
2587: sshkey_type(signkey), fp);
2588: free(fp);
2589: }
1.344 djm 2590: }
1.445 djm 2591: if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin,
1.416 djm 2592: fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) {
1.421 djm 2593: error_r(r, "Signing %s failed", filename);
1.344 djm 2594: goto out;
2595: }
2596: if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
1.421 djm 2597: error_fr(r, "sshsig_armor");
1.344 djm 2598: goto out;
2599: }
2600: if ((asig = sshbuf_dup_string(abuf)) == NULL) {
1.421 djm 2601: error_f("buffer error");
1.344 djm 2602: r = SSH_ERR_ALLOC_FAIL;
2603: goto out;
2604: }
2605:
2606: if (fd == STDIN_FILENO) {
2607: fputs(asig, stdout);
2608: fflush(stdout);
2609: } else {
2610: xasprintf(&wfile, "%s.sig", filename);
2611: if (confirm_overwrite(wfile)) {
2612: if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
2613: 0666)) == -1) {
2614: oerrno = errno;
2615: error("Cannot open %s: %s",
2616: wfile, strerror(errno));
2617: errno = oerrno;
2618: r = SSH_ERR_SYSTEM_ERROR;
2619: goto out;
2620: }
2621: if (atomicio(vwrite, wfd, asig,
2622: strlen(asig)) != strlen(asig)) {
2623: oerrno = errno;
2624: error("Cannot write to %s: %s",
2625: wfile, strerror(errno));
2626: errno = oerrno;
2627: r = SSH_ERR_SYSTEM_ERROR;
2628: goto out;
2629: }
2630: if (!quiet) {
2631: fprintf(stderr, "Write signature to %s\n",
2632: wfile);
2633: }
2634: }
2635: }
2636: /* success */
2637: r = 0;
2638: out:
2639: free(wfile);
1.416 djm 2640: free(prompt);
1.344 djm 2641: free(asig);
1.416 djm 2642: if (pin != NULL)
2643: freezero(pin, strlen(pin));
1.344 djm 2644: sshbuf_free(abuf);
2645: sshbuf_free(sigbuf);
2646: if (wfd != -1)
2647: close(wfd);
2648: return r;
2649: }
2650:
2651: static int
1.445 djm 2652: sig_process_opts(char * const *opts, size_t nopts, char **hashalgp,
2653: uint64_t *verify_timep, int *print_pubkey)
1.443 djm 2654: {
2655: size_t i;
2656: time_t now;
2657:
2658: if (verify_timep != NULL)
2659: *verify_timep = 0;
2660: if (print_pubkey != NULL)
2661: *print_pubkey = 0;
1.445 djm 2662: if (hashalgp != NULL)
2663: *hashalgp = NULL;
1.443 djm 2664: for (i = 0; i < nopts; i++) {
1.445 djm 2665: if (hashalgp != NULL &&
2666: strncasecmp(opts[i], "hashalg=", 8) == 0) {
2667: *hashalgp = xstrdup(opts[i] + 8);
2668: } else if (verify_timep &&
1.443 djm 2669: strncasecmp(opts[i], "verify-time=", 12) == 0) {
2670: if (parse_absolute_time(opts[i] + 12,
2671: verify_timep) != 0 || *verify_timep == 0) {
2672: error("Invalid \"verify-time\" option");
2673: return SSH_ERR_INVALID_ARGUMENT;
2674: }
2675: } else if (print_pubkey &&
2676: strcasecmp(opts[i], "print-pubkey") == 0) {
2677: *print_pubkey = 1;
2678: } else {
2679: error("Invalid option \"%s\"", opts[i]);
2680: return SSH_ERR_INVALID_ARGUMENT;
2681: }
2682: }
2683: if (verify_timep && *verify_timep == 0) {
2684: if ((now = time(NULL)) < 0) {
2685: error("Time is before epoch");
2686: return SSH_ERR_INVALID_ARGUMENT;
2687: }
2688: *verify_timep = (uint64_t)now;
2689: }
2690: return 0;
2691: }
2692:
2693:
2694: static int
1.452 djm 2695: sig_sign(const char *keypath, const char *sig_namespace, int require_agent,
2696: int argc, char **argv, char * const *opts, size_t nopts)
1.344 djm 2697: {
2698: int i, fd = -1, r, ret = -1;
2699: int agent_fd = -1;
2700: struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
2701: sshsig_signer *signer = NULL;
1.445 djm 2702: char *hashalg = NULL;
1.344 djm 2703:
2704: /* Check file arguments. */
2705: for (i = 0; i < argc; i++) {
2706: if (strcmp(argv[i], "-") != 0)
2707: continue;
2708: if (i > 0 || argc > 1)
2709: fatal("Cannot sign mix of paths and standard input");
2710: }
2711:
1.445 djm 2712: if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0)
2713: goto done; /* error already logged */
2714:
1.344 djm 2715: if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
1.421 djm 2716: error_r(r, "Couldn't load public key %s", keypath);
1.344 djm 2717: goto done;
2718: }
2719:
1.452 djm 2720: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
2721: if (require_agent)
2722: fatal("Couldn't get agent socket");
1.421 djm 2723: debug_r(r, "Couldn't get agent socket");
1.452 djm 2724: } else {
1.344 djm 2725: if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
2726: signer = agent_signer;
1.452 djm 2727: else {
2728: if (require_agent)
2729: fatal("Couldn't find key in agent");
1.421 djm 2730: debug_r(r, "Couldn't find key in agent");
1.452 djm 2731: }
1.344 djm 2732: }
2733:
2734: if (signer == NULL) {
2735: /* Not using agent - try to load private key */
2736: if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
2737: goto done;
2738: signkey = privkey;
2739: } else {
2740: /* Will use key in agent */
2741: signkey = pubkey;
2742: }
2743:
2744: if (argc == 0) {
2745: if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
1.445 djm 2746: sig_namespace, hashalg, signer, &agent_fd)) != 0)
1.344 djm 2747: goto done;
2748: } else {
2749: for (i = 0; i < argc; i++) {
2750: if (strcmp(argv[i], "-") == 0)
2751: fd = STDIN_FILENO;
2752: else if ((fd = open(argv[i], O_RDONLY)) == -1) {
2753: error("Cannot open %s for signing: %s",
2754: argv[i], strerror(errno));
2755: goto done;
2756: }
2757: if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
1.445 djm 2758: hashalg, signer, &agent_fd)) != 0)
1.344 djm 2759: goto done;
2760: if (fd != STDIN_FILENO)
2761: close(fd);
2762: fd = -1;
2763: }
2764: }
2765:
2766: ret = 0;
2767: done:
2768: if (fd != -1 && fd != STDIN_FILENO)
2769: close(fd);
2770: sshkey_free(pubkey);
2771: sshkey_free(privkey);
1.445 djm 2772: free(hashalg);
1.344 djm 2773: return ret;
1.432 djm 2774: }
2775:
2776: static int
1.386 djm 2777: sig_verify(const char *signature, const char *sig_namespace,
1.432 djm 2778: const char *principal, const char *allowed_keys, const char *revoked_keys,
2779: char * const *opts, size_t nopts)
1.344 djm 2780: {
1.393 djm 2781: int r, ret = -1;
1.435 djm 2782: int print_pubkey = 0;
1.344 djm 2783: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2784: struct sshkey *sign_key = NULL;
2785: char *fp = NULL;
1.370 djm 2786: struct sshkey_sig_details *sig_details = NULL;
1.432 djm 2787: uint64_t verify_time = 0;
2788:
1.445 djm 2789: if (sig_process_opts(opts, nopts, NULL, &verify_time,
2790: &print_pubkey) != 0)
1.432 djm 2791: goto done; /* error already logged */
1.344 djm 2792:
1.370 djm 2793: memset(&sig_details, 0, sizeof(sig_details));
1.393 djm 2794: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2795: error_r(r, "Couldn't read signature file");
1.344 djm 2796: goto done;
2797: }
2798:
2799: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2800: error_fr(r, "sshsig_armor");
1.386 djm 2801: goto done;
1.344 djm 2802: }
2803: if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
1.370 djm 2804: &sign_key, &sig_details)) != 0)
1.344 djm 2805: goto done; /* sshsig_verify() prints error */
2806:
2807: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2808: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2809: fatal_f("sshkey_fingerprint failed");
1.344 djm 2810: debug("Valid (unverified) signature from key %s", fp);
1.370 djm 2811: if (sig_details != NULL) {
1.421 djm 2812: debug2_f("signature details: counter = %u, flags = 0x%02x",
2813: sig_details->sk_counter, sig_details->sk_flags);
1.370 djm 2814: }
1.344 djm 2815: free(fp);
2816: fp = NULL;
2817:
2818: if (revoked_keys != NULL) {
1.345 djm 2819: if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
1.421 djm 2820: debug3_fr(r, "sshkey_check_revoked");
1.345 djm 2821: goto done;
2822: }
1.344 djm 2823: }
2824:
1.421 djm 2825: if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,
1.432 djm 2826: sign_key, principal, sig_namespace, verify_time)) != 0) {
1.421 djm 2827: debug3_fr(r, "sshsig_check_allowed_keys");
1.344 djm 2828: goto done;
2829: }
2830: /* success */
2831: ret = 0;
2832: done:
2833: if (!quiet) {
2834: if (ret == 0) {
2835: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
1.421 djm 2836: SSH_FP_DEFAULT)) == NULL)
2837: fatal_f("sshkey_fingerprint failed");
1.350 djm 2838: if (principal == NULL) {
2839: printf("Good \"%s\" signature with %s key %s\n",
1.429 djm 2840: sig_namespace, sshkey_type(sign_key), fp);
1.350 djm 2841:
2842: } else {
2843: printf("Good \"%s\" signature for %s with %s key %s\n",
1.429 djm 2844: sig_namespace, principal,
2845: sshkey_type(sign_key), fp);
1.350 djm 2846: }
1.344 djm 2847: } else {
2848: printf("Could not verify signature.\n");
2849: }
2850: }
1.435 djm 2851: /* Print the signature key if requested */
2852: if (ret == 0 && print_pubkey && sign_key != NULL) {
2853: if ((r = sshkey_write(sign_key, stdout)) == 0)
2854: fputc('\n', stdout);
2855: else {
2856: error_r(r, "Could not print public key.\n");
2857: ret = -1;
2858: }
2859: }
1.344 djm 2860: sshbuf_free(sigbuf);
2861: sshbuf_free(abuf);
2862: sshkey_free(sign_key);
1.370 djm 2863: sshkey_sig_details_free(sig_details);
1.344 djm 2864: free(fp);
2865: return ret;
2866: }
2867:
1.386 djm 2868: static int
1.432 djm 2869: sig_find_principals(const char *signature, const char *allowed_keys,
2870: char * const *opts, size_t nopts)
2871: {
1.393 djm 2872: int r, ret = -1;
1.386 djm 2873: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2874: struct sshkey *sign_key = NULL;
1.391 djm 2875: char *principals = NULL, *cp, *tmp;
1.432 djm 2876: uint64_t verify_time = 0;
2877:
1.445 djm 2878: if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0)
1.432 djm 2879: goto done; /* error already logged */
1.386 djm 2880:
1.393 djm 2881: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2882: error_r(r, "Couldn't read signature file");
1.386 djm 2883: goto done;
2884: }
2885: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2886: error_fr(r, "sshsig_armor");
1.386 djm 2887: goto done;
2888: }
2889: if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
1.421 djm 2890: error_fr(r, "sshsig_get_pubkey");
1.386 djm 2891: goto done;
2892: }
1.388 djm 2893: if ((r = sshsig_find_principals(allowed_keys, sign_key,
1.432 djm 2894: verify_time, &principals)) != 0) {
1.431 djm 2895: if (r != SSH_ERR_KEY_NOT_FOUND)
2896: error_fr(r, "sshsig_find_principal");
1.386 djm 2897: goto done;
2898: }
2899: ret = 0;
2900: done:
2901: if (ret == 0 ) {
1.391 djm 2902: /* Emit matching principals one per line */
2903: tmp = principals;
2904: while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0')
2905: puts(cp);
1.386 djm 2906: } else {
1.391 djm 2907: fprintf(stderr, "No principal matched.\n");
1.386 djm 2908: }
2909: sshbuf_free(sigbuf);
2910: sshbuf_free(abuf);
2911: sshkey_free(sign_key);
1.388 djm 2912: free(principals);
1.386 djm 2913: return ret;
2914: }
2915:
1.441 djm 2916: static int
2917: sig_match_principals(const char *allowed_keys, char *principal,
2918: char * const *opts, size_t nopts)
2919: {
2920: int r;
2921: char **principals = NULL;
2922: size_t i, nprincipals = 0;
2923:
1.445 djm 2924: if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0)
1.441 djm 2925: return r; /* error already logged */
2926:
2927: if ((r = sshsig_match_principals(allowed_keys, principal,
2928: &principals, &nprincipals)) != 0) {
2929: debug_f("match: %s", ssh_err(r));
2930: fprintf(stderr, "No principal matched.\n");
2931: return r;
2932: }
2933: for (i = 0; i < nprincipals; i++) {
2934: printf("%s\n", principals[i]);
2935: free(principals[i]);
2936: }
2937: free(principals);
2938:
2939: return 0;
2940: }
2941:
1.223 djm 2942: static void
1.376 djm 2943: do_moduli_gen(const char *out_file, char **opts, size_t nopts)
2944: {
2945: #ifdef WITH_OPENSSL
2946: /* Moduli generation/screening */
2947: u_int32_t memory = 0;
2948: BIGNUM *start = NULL;
2949: int moduli_bits = 0;
2950: FILE *out;
2951: size_t i;
2952: const char *errstr;
2953:
2954: /* Parse options */
2955: for (i = 0; i < nopts; i++) {
2956: if (strncmp(opts[i], "memory=", 7) == 0) {
2957: memory = (u_int32_t)strtonum(opts[i]+7, 1,
2958: UINT_MAX, &errstr);
2959: if (errstr) {
2960: fatal("Memory limit is %s: %s",
2961: errstr, opts[i]+7);
2962: }
2963: } else if (strncmp(opts[i], "start=", 6) == 0) {
2964: /* XXX - also compare length against bits */
2965: if (BN_hex2bn(&start, opts[i]+6) == 0)
2966: fatal("Invalid start point.");
2967: } else if (strncmp(opts[i], "bits=", 5) == 0) {
2968: moduli_bits = (int)strtonum(opts[i]+5, 1,
2969: INT_MAX, &errstr);
2970: if (errstr) {
2971: fatal("Invalid number: %s (%s)",
2972: opts[i]+12, errstr);
2973: }
2974: } else {
2975: fatal("Option \"%s\" is unsupported for moduli "
2976: "generation", opts[i]);
2977: }
2978: }
2979:
2980: if ((out = fopen(out_file, "w")) == NULL) {
2981: fatal("Couldn't open modulus candidate file \"%s\": %s",
2982: out_file, strerror(errno));
2983: }
2984: setvbuf(out, NULL, _IOLBF, 0);
2985:
2986: if (moduli_bits == 0)
2987: moduli_bits = DEFAULT_BITS;
2988: if (gen_candidates(out, memory, moduli_bits, start) != 0)
2989: fatal("modulus candidate generation failed");
2990: #else /* WITH_OPENSSL */
2991: fatal("Moduli generation is not supported");
2992: #endif /* WITH_OPENSSL */
2993: }
2994:
2995: static void
2996: do_moduli_screen(const char *out_file, char **opts, size_t nopts)
2997: {
2998: #ifdef WITH_OPENSSL
2999: /* Moduli generation/screening */
3000: char *checkpoint = NULL;
3001: u_int32_t generator_wanted = 0;
3002: unsigned long start_lineno = 0, lines_to_process = 0;
3003: int prime_tests = 0;
3004: FILE *out, *in = stdin;
3005: size_t i;
3006: const char *errstr;
3007:
3008: /* Parse options */
3009: for (i = 0; i < nopts; i++) {
3010: if (strncmp(opts[i], "lines=", 6) == 0) {
3011: lines_to_process = strtoul(opts[i]+6, NULL, 10);
3012: } else if (strncmp(opts[i], "start-line=", 11) == 0) {
3013: start_lineno = strtoul(opts[i]+11, NULL, 10);
3014: } else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
1.465 dtucker 3015: free(checkpoint);
1.376 djm 3016: checkpoint = xstrdup(opts[i]+11);
3017: } else if (strncmp(opts[i], "generator=", 10) == 0) {
3018: generator_wanted = (u_int32_t)strtonum(
3019: opts[i]+10, 1, UINT_MAX, &errstr);
3020: if (errstr != NULL) {
3021: fatal("Generator invalid: %s (%s)",
3022: opts[i]+10, errstr);
3023: }
3024: } else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
3025: prime_tests = (int)strtonum(opts[i]+12, 1,
3026: INT_MAX, &errstr);
3027: if (errstr) {
3028: fatal("Invalid number: %s (%s)",
3029: opts[i]+12, errstr);
3030: }
3031: } else {
3032: fatal("Option \"%s\" is unsupported for moduli "
3033: "screening", opts[i]);
3034: }
3035: }
3036:
3037: if (have_identity && strcmp(identity_file, "-") != 0) {
3038: if ((in = fopen(identity_file, "r")) == NULL) {
3039: fatal("Couldn't open modulus candidate "
3040: "file \"%s\": %s", identity_file,
3041: strerror(errno));
3042: }
3043: }
3044:
3045: if ((out = fopen(out_file, "a")) == NULL) {
3046: fatal("Couldn't open moduli file \"%s\": %s",
3047: out_file, strerror(errno));
3048: }
3049: setvbuf(out, NULL, _IOLBF, 0);
3050: if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
3051: generator_wanted, checkpoint,
3052: start_lineno, lines_to_process) != 0)
3053: fatal("modulus screening failed");
1.465 dtucker 3054: if (in != stdin)
3055: (void)fclose(in);
1.464 dtucker 3056: free(checkpoint);
1.376 djm 3057: #else /* WITH_OPENSSL */
3058: fatal("Moduli screening is not supported");
3059: #endif /* WITH_OPENSSL */
3060: }
3061:
1.455 djm 3062: /* Read and confirm a passphrase */
1.381 djm 3063: static char *
1.455 djm 3064: read_check_passphrase(const char *prompt1, const char *prompt2,
3065: const char *retry_prompt)
1.381 djm 3066: {
3067: char *passphrase1, *passphrase2;
3068:
1.455 djm 3069: for (;;) {
3070: passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN);
3071: passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN);
3072: if (strcmp(passphrase1, passphrase2) == 0) {
1.381 djm 3073: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3074: return passphrase1;
1.381 djm 3075: }
1.455 djm 3076: /* The passphrases do not match. Clear them and retry. */
3077: freezero(passphrase1, strlen(passphrase1));
1.381 djm 3078: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3079: fputs(retry_prompt, stdout);
3080: fputc('\n', stdout);
3081: fflush(stdout);
1.381 djm 3082: }
1.455 djm 3083: /* NOTREACHED */
3084: return NULL;
3085: }
3086:
3087: static char *
3088: private_key_passphrase(void)
3089: {
3090: if (identity_passphrase)
3091: return xstrdup(identity_passphrase);
3092: if (identity_new_passphrase)
3093: return xstrdup(identity_new_passphrase);
3094:
3095: return read_check_passphrase(
3096: "Enter passphrase (empty for no passphrase): ",
3097: "Enter same passphrase again: ",
3098: "Passphrases do not match. Try again.");
1.381 djm 3099: }
3100:
1.439 djm 3101: static char *
3102: sk_suffix(const char *application, const uint8_t *user, size_t userlen)
1.381 djm 3103: {
1.439 djm 3104: char *ret, *cp;
3105: size_t slen, i;
3106:
3107: /* Trim off URL-like preamble */
3108: if (strncmp(application, "ssh://", 6) == 0)
3109: ret = xstrdup(application + 6);
3110: else if (strncmp(application, "ssh:", 4) == 0)
3111: ret = xstrdup(application + 4);
3112: else
3113: ret = xstrdup(application);
3114:
3115: /* Count trailing zeros in user */
3116: for (i = 0; i < userlen; i++) {
3117: if (user[userlen - i - 1] != 0)
3118: break;
3119: }
3120: if (i >= userlen)
3121: return ret; /* user-id was default all-zeros */
3122:
3123: /* Append user-id, escaping non-UTF-8 characters */
3124: slen = userlen - i;
3125: if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)
3126: fatal_f("asmprintf failed");
3127: /* Don't emit a user-id that contains path or control characters */
3128: if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||
3129: strchr(cp, '\\') != NULL) {
3130: free(cp);
3131: cp = tohex(user, slen);
3132: }
3133: xextendf(&ret, "_", "%s", cp);
3134: free(cp);
3135: return ret;
1.381 djm 3136: }
3137:
3138: static int
1.382 djm 3139: do_download_sk(const char *skprovider, const char *device)
1.381 djm 3140: {
1.439 djm 3141: struct sshsk_resident_key **srks;
3142: size_t nsrks, i;
1.412 djm 3143: int r, ret = -1;
1.403 djm 3144: char *fp, *pin = NULL, *pass = NULL, *path, *pubpath;
1.381 djm 3145: const char *ext;
1.439 djm 3146: struct sshkey *key;
1.381 djm 3147:
3148: if (skprovider == NULL)
3149: fatal("Cannot download keys without provider");
3150:
1.418 djm 3151: pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
3152: if (!quiet) {
3153: printf("You may need to touch your authenticator "
3154: "to authorize key download.\n");
3155: }
1.439 djm 3156: if ((r = sshsk_load_resident(skprovider, device, pin, 0,
3157: &srks, &nsrks)) != 0) {
1.418 djm 3158: if (pin != NULL)
3159: freezero(pin, strlen(pin));
1.421 djm 3160: error_r(r, "Unable to load resident keys");
1.418 djm 3161: return -1;
1.381 djm 3162: }
1.439 djm 3163: if (nsrks == 0)
1.381 djm 3164: logit("No keys to download");
1.411 djm 3165: if (pin != NULL)
3166: freezero(pin, strlen(pin));
1.381 djm 3167:
1.439 djm 3168: for (i = 0; i < nsrks; i++) {
3169: key = srks[i]->key;
3170: if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) {
1.381 djm 3171: error("Unsupported key type %s (%d)",
1.439 djm 3172: sshkey_type(key), key->type);
1.381 djm 3173: continue;
3174: }
1.439 djm 3175: if ((fp = sshkey_fingerprint(key, fingerprint_hash,
3176: SSH_FP_DEFAULT)) == NULL)
1.421 djm 3177: fatal_f("sshkey_fingerprint failed");
3178: debug_f("key %zu: %s %s %s (flags 0x%02x)", i,
1.439 djm 3179: sshkey_type(key), fp, key->sk_application, key->sk_flags);
3180: ext = sk_suffix(key->sk_application,
3181: srks[i]->user_id, srks[i]->user_id_len);
1.381 djm 3182: xasprintf(&path, "id_%s_rk%s%s",
1.439 djm 3183: key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
1.381 djm 3184: *ext == '\0' ? "" : "_", ext);
3185:
3186: /* If the file already exists, ask the user to confirm. */
3187: if (!confirm_overwrite(path)) {
3188: free(path);
3189: break;
3190: }
3191:
3192: /* Save the key with the application string as the comment */
3193: if (pass == NULL)
3194: pass = private_key_passphrase();
1.439 djm 3195: if ((r = sshkey_save_private(key, path, pass,
3196: key->sk_application, private_key_format,
1.381 djm 3197: openssh_format_cipher, rounds)) != 0) {
1.421 djm 3198: error_r(r, "Saving key \"%s\" failed", path);
1.381 djm 3199: free(path);
3200: break;
3201: }
3202: if (!quiet) {
1.439 djm 3203: printf("Saved %s key%s%s to %s\n", sshkey_type(key),
1.381 djm 3204: *ext != '\0' ? " " : "",
1.439 djm 3205: *ext != '\0' ? key->sk_application : "",
1.381 djm 3206: path);
3207: }
3208:
3209: /* Save public key too */
3210: xasprintf(&pubpath, "%s.pub", path);
3211: free(path);
1.439 djm 3212: if ((r = sshkey_save_public(key, pubpath,
3213: key->sk_application)) != 0) {
1.421 djm 3214: error_r(r, "Saving public key \"%s\" failed", pubpath);
1.402 markus 3215: free(pubpath);
1.381 djm 3216: break;
3217: }
3218: free(pubpath);
3219: }
3220:
1.439 djm 3221: if (i >= nsrks)
1.412 djm 3222: ret = 0; /* success */
1.381 djm 3223: if (pass != NULL)
3224: freezero(pass, strlen(pass));
1.439 djm 3225: sshsk_free_resident_keys(srks, nsrks);
1.412 djm 3226: return ret;
1.381 djm 3227: }
3228:
1.376 djm 3229: static void
1.420 djm 3230: save_attestation(struct sshbuf *attest, const char *path)
3231: {
3232: mode_t omask;
3233: int r;
3234:
3235: if (path == NULL)
3236: return; /* nothing to do */
3237: if (attest == NULL || sshbuf_len(attest) == 0)
3238: fatal("Enrollment did not return attestation data");
3239: omask = umask(077);
3240: r = sshbuf_write_file(path, attest);
3241: umask(omask);
3242: if (r != 0)
1.421 djm 3243: fatal_r(r, "Unable to write attestation data \"%s\"", path);
1.420 djm 3244: if (!quiet)
3245: printf("Your FIDO attestation certificate has been saved in "
3246: "%s\n", path);
3247: }
3248:
1.456 djm 3249: static int
3250: confirm_sk_overwrite(const char *application, const char *user)
3251: {
3252: char yesno[3];
3253:
3254: printf("A resident key scoped to '%s' with user id '%s' already "
3255: "exists.\n", application == NULL ? "ssh:" : application,
3256: user == NULL ? "null" : user);
3257: printf("Overwrite key in token (y/n)? ");
3258: fflush(stdout);
3259: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
3260: return 0;
3261: if (yesno[0] != 'y' && yesno[0] != 'Y')
3262: return 0;
3263: return 1;
3264: }
3265:
1.420 djm 3266: static void
1.10 markus 3267: usage(void)
3268: {
1.243 deraadt 3269: fprintf(stderr,
1.414 solene 3270: "usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"
3271: " [-m format] [-N new_passphrase] [-O option]\n"
1.369 naddy 3272: " [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
1.425 dtucker 3273: " [-w provider] [-Z cipher]\n"
1.414 solene 3274: " ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n"
1.425 dtucker 3275: " [-P old_passphrase] [-Z cipher]\n"
1.433 dtucker 3276: #ifdef WITH_OPENSSL
1.355 jmc 3277: " ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
3278: " ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
1.434 dtucker 3279: #endif
1.243 deraadt 3280: " ssh-keygen -y [-f input_keyfile]\n"
1.414 solene 3281: " ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n"
1.265 naddy 3282: " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
1.302 djm 3283: " ssh-keygen -B [-f input_keyfile]\n");
1.177 markus 3284: #ifdef ENABLE_PKCS11
1.243 deraadt 3285: fprintf(stderr,
3286: " ssh-keygen -D pkcs11\n");
1.177 markus 3287: #endif
1.243 deraadt 3288: fprintf(stderr,
1.352 jmc 3289: " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
1.243 deraadt 3290: " ssh-keygen -H [-f known_hosts_file]\n"
1.414 solene 3291: " ssh-keygen -K [-a rounds] [-w provider]\n"
1.243 deraadt 3292: " ssh-keygen -R hostname [-f known_hosts_file]\n"
1.352 jmc 3293: " ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
1.274 djm 3294: #ifdef WITH_OPENSSL
1.383 naddy 3295: " ssh-keygen -M generate [-O option] output_file\n"
3296: " ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
1.274 djm 3297: #endif
1.355 jmc 3298: " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
3299: " [-n principals] [-O option] [-V validity_interval]\n"
3300: " [-z serial_number] file ...\n"
1.243 deraadt 3301: " ssh-keygen -L [-f input_keyfile]\n"
1.414 solene 3302: " ssh-keygen -A [-a rounds] [-f prefix_path]\n"
1.243 deraadt 3303: " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
3304: " file ...\n"
1.405 djm 3305: " ssh-keygen -Q [-l] -f krl_file [file ...]\n"
1.388 djm 3306: " ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
1.442 djm 3307: " ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n"
1.355 jmc 3308: " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
1.445 djm 3309: " ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n"
1.355 jmc 3310: " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
1.445 djm 3311: " -n namespace -s signature_file [-r krl_file] [-O option]\n");
1.12 markus 3312: exit(1);
1.10 markus 3313: }
3314:
1.13 deraadt 3315: /*
3316: * Main program for key management.
3317: */
1.2 provos 3318: int
1.156 deraadt 3319: main(int argc, char **argv)
1.1 deraadt 3320: {
1.458 djm 3321: char comment[1024], *passphrase = NULL;
1.274 djm 3322: char *rr_hostname = NULL, *ep, *fp, *ra;
1.252 djm 3323: struct sshkey *private, *public;
1.12 markus 3324: struct passwd *pw;
1.381 djm 3325: int r, opt, type;
1.325 djm 3326: int change_passphrase = 0, change_comment = 0, show_cert = 0;
3327: int find_host = 0, delete_host = 0, hash_hosts = 0;
1.274 djm 3328: int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
1.325 djm 3329: int prefer_agent = 0, convert_to = 0, convert_from = 0;
1.326 djm 3330: int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
1.381 djm 3331: int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
1.380 djm 3332: unsigned long long cert_serial = 0;
1.375 djm 3333: char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
1.382 djm 3334: char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
1.420 djm 3335: char *sk_attestation_path = NULL;
1.395 djm 3336: struct sshbuf *challenge = NULL, *attest = NULL;
1.375 djm 3337: size_t i, nopts = 0;
1.340 dtucker 3338: u_int32_t bits = 0;
1.357 djm 3339: uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
1.274 djm 3340: const char *errstr;
1.325 djm 3341: int log_level = SYSLOG_LEVEL_INFO;
1.344 djm 3342: char *sign_op = NULL;
1.33 markus 3343:
1.12 markus 3344: extern int optind;
3345: extern char *optarg;
1.129 djm 3346:
3347: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
3348: sanitise_stdfd();
1.12 markus 3349:
1.348 djm 3350: #ifdef WITH_OPENSSL
1.201 djm 3351: OpenSSL_add_all_algorithms();
1.348 djm 3352: #endif
1.156 deraadt 3353: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.294 djm 3354:
3355: setlocale(LC_CTYPE, "");
1.19 markus 3356:
1.14 markus 3357: /* we need this for the home * directory. */
1.12 markus 3358: pw = getpwuid(getuid());
1.269 djm 3359: if (!pw)
3360: fatal("No user exists for uid %lu", (u_long)getuid());
1.428 djm 3361: pw = pwcopy(pw);
1.333 deraadt 3362: if (gethostname(hostname, sizeof(hostname)) == -1)
1.269 djm 3363: fatal("gethostname: %s", strerror(errno));
1.14 markus 3364:
1.357 djm 3365: sk_provider = getenv("SSH_SK_PROVIDER");
3366:
1.381 djm 3367: /* Remaining characters: dGjJSTWx */
3368: while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
1.376 djm 3369: "C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
1.380 djm 3370: "a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
1.12 markus 3371: switch (opt) {
1.206 stevesk 3372: case 'A':
3373: gen_all_hostkeys = 1;
3374: break;
1.12 markus 3375: case 'b':
1.340 dtucker 3376: bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
3377: &errstr);
1.125 avsm 3378: if (errstr)
3379: fatal("Bits has bad value %s (%s)",
3380: optarg, errstr);
1.12 markus 3381: break;
1.251 djm 3382: case 'E':
3383: fingerprint_hash = ssh_digest_alg_by_name(optarg);
3384: if (fingerprint_hash == -1)
3385: fatal("Invalid hash algorithm \"%s\"", optarg);
3386: break;
1.119 djm 3387: case 'F':
3388: find_host = 1;
3389: rr_hostname = optarg;
3390: break;
3391: case 'H':
3392: hash_hosts = 1;
3393: break;
1.179 djm 3394: case 'I':
3395: cert_key_id = optarg;
3396: break;
1.119 djm 3397: case 'R':
3398: delete_host = 1;
3399: rr_hostname = optarg;
3400: break;
1.182 djm 3401: case 'L':
3402: show_cert = 1;
3403: break;
1.12 markus 3404: case 'l':
3405: print_fingerprint = 1;
3406: break;
1.49 markus 3407: case 'B':
3408: print_bubblebabble = 1;
3409: break;
1.193 djm 3410: case 'm':
3411: if (strcasecmp(optarg, "RFC4716") == 0 ||
3412: strcasecmp(optarg, "ssh2") == 0) {
3413: convert_format = FMT_RFC4716;
3414: break;
3415: }
3416: if (strcasecmp(optarg, "PKCS8") == 0) {
3417: convert_format = FMT_PKCS8;
1.336 djm 3418: private_key_format = SSHKEY_PRIVATE_PKCS8;
1.193 djm 3419: break;
3420: }
3421: if (strcasecmp(optarg, "PEM") == 0) {
3422: convert_format = FMT_PEM;
1.336 djm 3423: private_key_format = SSHKEY_PRIVATE_PEM;
1.193 djm 3424: break;
3425: }
3426: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 3427: case 'n':
3428: cert_principals = optarg;
3429: break;
1.237 markus 3430: case 'o':
1.319 djm 3431: /* no-op; new format is already the default */
1.237 markus 3432: break;
1.12 markus 3433: case 'p':
3434: change_passphrase = 1;
3435: break;
3436: case 'c':
3437: change_comment = 1;
3438: break;
3439: case 'f':
1.274 djm 3440: if (strlcpy(identity_file, optarg,
3441: sizeof(identity_file)) >= sizeof(identity_file))
1.124 avsm 3442: fatal("Identity filename too long");
1.12 markus 3443: have_identity = 1;
3444: break;
1.105 jakob 3445: case 'g':
3446: print_generic = 1;
3447: break;
1.381 djm 3448: case 'K':
3449: download_sk = 1;
3450: break;
1.12 markus 3451: case 'P':
3452: identity_passphrase = optarg;
3453: break;
3454: case 'N':
3455: identity_new_passphrase = optarg;
3456: break;
1.223 djm 3457: case 'Q':
3458: check_krl = 1;
3459: break;
1.179 djm 3460: case 'O':
1.375 djm 3461: opts = xrecallocarray(opts, nopts, nopts + 1,
3462: sizeof(*opts));
3463: opts[nopts++] = xstrdup(optarg);
1.179 djm 3464: break;
1.237 markus 3465: case 'Z':
1.336 djm 3466: openssh_format_cipher = optarg;
1.425 dtucker 3467: if (cipher_by_name(openssh_format_cipher) == NULL)
3468: fatal("Invalid OpenSSH-format cipher '%s'",
3469: openssh_format_cipher);
1.237 markus 3470: break;
1.12 markus 3471: case 'C':
3472: identity_comment = optarg;
3473: break;
3474: case 'q':
3475: quiet = 1;
1.20 deraadt 3476: break;
1.57 markus 3477: case 'e':
3478: /* export key */
1.193 djm 3479: convert_to = 1;
1.19 markus 3480: break;
1.179 djm 3481: case 'h':
3482: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 3483: certflags_flags = 0;
1.179 djm 3484: break;
1.223 djm 3485: case 'k':
3486: gen_krl = 1;
3487: break;
1.57 markus 3488: case 'i':
1.19 markus 3489: case 'X':
1.57 markus 3490: /* import key */
1.193 djm 3491: convert_from = 1;
1.19 markus 3492: break;
3493: case 'y':
3494: print_public = 1;
3495: break;
1.179 djm 3496: case 's':
3497: ca_key_path = optarg;
3498: break;
1.33 markus 3499: case 't':
3500: key_type_name = optarg;
3501: break;
1.75 markus 3502: case 'D':
1.177 markus 3503: pkcs11provider = optarg;
1.305 djm 3504: break;
3505: case 'U':
3506: prefer_agent = 1;
1.66 markus 3507: break;
1.223 djm 3508: case 'u':
3509: update_krl = 1;
3510: break;
1.113 djm 3511: case 'v':
3512: if (log_level == SYSLOG_LEVEL_INFO)
3513: log_level = SYSLOG_LEVEL_DEBUG1;
3514: else {
1.117 deraadt 3515: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 3516: log_level < SYSLOG_LEVEL_DEBUG3)
3517: log_level++;
3518: }
3519: break;
1.105 jakob 3520: case 'r':
1.119 djm 3521: rr_hostname = optarg;
1.105 jakob 3522: break;
1.107 djm 3523: case 'a':
1.237 markus 3524: rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
1.124 avsm 3525: if (errstr)
1.237 markus 3526: fatal("Invalid number: %s (%s)",
1.124 avsm 3527: optarg, errstr);
1.107 djm 3528: break;
1.274 djm 3529: case 'V':
3530: parse_cert_times(optarg);
3531: break;
1.344 djm 3532: case 'Y':
3533: sign_op = optarg;
1.365 djm 3534: break;
1.357 djm 3535: case 'w':
3536: sk_provider = optarg;
3537: break;
1.274 djm 3538: case 'z':
3539: errno = 0;
1.326 djm 3540: if (*optarg == '+') {
3541: cert_serial_autoinc = 1;
3542: optarg++;
3543: }
1.274 djm 3544: cert_serial = strtoull(optarg, &ep, 10);
3545: if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
3546: (errno == ERANGE && cert_serial == ULLONG_MAX))
3547: fatal("Invalid serial number \"%s\"", optarg);
1.107 djm 3548: break;
1.274 djm 3549: case 'M':
1.376 djm 3550: if (strcmp(optarg, "generate") == 0)
3551: do_gen_candidates = 1;
3552: else if (strcmp(optarg, "screen") == 0)
3553: do_screen_candidates = 1;
3554: else
3555: fatal("Unsupported moduli option %s", optarg);
1.179 djm 3556: break;
1.12 markus 3557: default:
3558: usage();
3559: }
3560: }
1.364 djm 3561:
3562: if (sk_provider == NULL)
3563: sk_provider = "internal";
1.113 djm 3564:
3565: /* reinit */
1.156 deraadt 3566: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 3567:
1.179 djm 3568: argv += optind;
3569: argc -= optind;
1.344 djm 3570:
3571: if (sign_op != NULL) {
1.388 djm 3572: if (strncmp(sign_op, "find-principals", 15) == 0) {
1.386 djm 3573: if (ca_key_path == NULL) {
1.388 djm 3574: error("Too few arguments for find-principals:"
1.429 djm 3575: "missing signature file");
1.386 djm 3576: exit(1);
3577: }
3578: if (!have_identity) {
1.388 djm 3579: error("Too few arguments for find-principals:"
1.429 djm 3580: "missing allowed keys file");
1.386 djm 3581: exit(1);
3582: }
1.432 djm 3583: return sig_find_principals(ca_key_path, identity_file,
1.441 djm 3584: opts, nopts);
3585: } else if (strncmp(sign_op, "match-principals", 16) == 0) {
3586: if (!have_identity) {
3587: error("Too few arguments for match-principals:"
3588: "missing allowed keys file");
3589: exit(1);
3590: }
3591: if (cert_key_id == NULL) {
3592: error("Too few arguments for match-principals: "
3593: "missing principal ID");
3594: exit(1);
3595: }
3596: return sig_match_principals(identity_file, cert_key_id,
1.432 djm 3597: opts, nopts);
1.391 djm 3598: } else if (strncmp(sign_op, "sign", 4) == 0) {
1.447 djm 3599: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3600: if (cert_principals == NULL ||
3601: *cert_principals == '\0') {
3602: error("Too few arguments for sign: "
3603: "missing namespace");
3604: exit(1);
3605: }
1.344 djm 3606: if (!have_identity) {
3607: error("Too few arguments for sign: "
3608: "missing key");
3609: exit(1);
3610: }
1.386 djm 3611: return sig_sign(identity_file, cert_principals,
1.452 djm 3612: prefer_agent, argc, argv, opts, nopts);
1.350 djm 3613: } else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
1.450 djm 3614: /* NB. cert_principals is actually namespace, via -n */
1.449 djm 3615: if (cert_principals == NULL ||
3616: *cert_principals == '\0') {
3617: error("Too few arguments for check-novalidate: "
3618: "missing namespace");
3619: exit(1);
3620: }
1.350 djm 3621: if (ca_key_path == NULL) {
3622: error("Too few arguments for check-novalidate: "
1.429 djm 3623: "missing signature file");
1.350 djm 3624: exit(1);
3625: }
1.386 djm 3626: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3627: NULL, NULL, NULL, opts, nopts);
1.344 djm 3628: } else if (strncmp(sign_op, "verify", 6) == 0) {
1.447 djm 3629: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3630: if (cert_principals == NULL ||
3631: *cert_principals == '\0') {
3632: error("Too few arguments for verify: "
1.447 djm 3633: "missing namespace");
1.391 djm 3634: exit(1);
3635: }
1.344 djm 3636: if (ca_key_path == NULL) {
3637: error("Too few arguments for verify: "
3638: "missing signature file");
3639: exit(1);
3640: }
3641: if (!have_identity) {
3642: error("Too few arguments for sign: "
3643: "missing allowed keys file");
3644: exit(1);
3645: }
3646: if (cert_key_id == NULL) {
3647: error("Too few arguments for verify: "
1.447 djm 3648: "missing principal identity");
1.344 djm 3649: exit(1);
3650: }
1.386 djm 3651: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3652: cert_key_id, identity_file, rr_hostname,
3653: opts, nopts);
1.344 djm 3654: }
1.391 djm 3655: error("Unsupported operation for -Y: \"%s\"", sign_op);
1.344 djm 3656: usage();
3657: /* NOTREACHED */
3658: }
1.179 djm 3659:
3660: if (ca_key_path != NULL) {
1.223 djm 3661: if (argc < 1 && !gen_krl) {
1.269 djm 3662: error("Too few arguments.");
1.179 djm 3663: usage();
3664: }
1.376 djm 3665: } else if (argc > 0 && !gen_krl && !check_krl &&
3666: !do_gen_candidates && !do_screen_candidates) {
1.269 djm 3667: error("Too many arguments.");
1.87 djm 3668: usage();
3669: }
1.12 markus 3670: if (change_passphrase && change_comment) {
1.269 djm 3671: error("Can only have one of -p and -c.");
1.166 djm 3672: usage();
3673: }
3674: if (print_fingerprint && (delete_host || hash_hosts)) {
1.269 djm 3675: error("Cannot use -l with -H or -R.");
1.12 markus 3676: usage();
1.223 djm 3677: }
1.376 djm 3678: if (gen_krl) {
1.325 djm 3679: do_gen_krl(pw, update_krl, ca_key_path,
3680: cert_serial, identity_comment, argc, argv);
1.223 djm 3681: return (0);
3682: }
3683: if (check_krl) {
1.405 djm 3684: do_check_krl(pw, print_fingerprint, argc, argv);
1.223 djm 3685: return (0);
1.179 djm 3686: }
3687: if (ca_key_path != NULL) {
3688: if (cert_key_id == NULL)
3689: fatal("Must specify key id (-I) when certifying");
1.375 djm 3690: for (i = 0; i < nopts; i++)
3691: add_cert_option(opts[i]);
1.326 djm 3692: do_ca_sign(pw, ca_key_path, prefer_agent,
3693: cert_serial, cert_serial_autoinc, argc, argv);
1.12 markus 3694: }
1.182 djm 3695: if (show_cert)
3696: do_show_cert(pw);
1.325 djm 3697: if (delete_host || hash_hosts || find_host) {
3698: do_known_hosts(pw, rr_hostname, find_host,
3699: delete_host, hash_hosts);
3700: }
1.221 djm 3701: if (pkcs11provider != NULL)
3702: do_download(pw);
1.382 djm 3703: if (download_sk) {
3704: for (i = 0; i < nopts; i++) {
3705: if (strncasecmp(opts[i], "device=", 7) == 0) {
3706: sk_device = xstrdup(opts[i] + 7);
3707: } else {
3708: fatal("Option \"%s\" is unsupported for "
3709: "FIDO authenticator download", opts[i]);
3710: }
3711: }
3712: return do_download_sk(sk_provider, sk_device);
3713: }
1.49 markus 3714: if (print_fingerprint || print_bubblebabble)
1.12 markus 3715: do_fingerprint(pw);
3716: if (change_passphrase)
3717: do_change_passphrase(pw);
3718: if (change_comment)
1.325 djm 3719: do_change_comment(pw, identity_comment);
1.246 markus 3720: #ifdef WITH_OPENSSL
1.193 djm 3721: if (convert_to)
3722: do_convert_to(pw);
3723: if (convert_from)
3724: do_convert_from(pw);
1.349 djm 3725: #else /* WITH_OPENSSL */
3726: if (convert_to || convert_from)
3727: fatal("key conversion disabled at compile time");
3728: #endif /* WITH_OPENSSL */
1.19 markus 3729: if (print_public)
3730: do_print_public(pw);
1.119 djm 3731: if (rr_hostname != NULL) {
1.138 jakob 3732: unsigned int n = 0;
3733:
3734: if (have_identity) {
1.325 djm 3735: n = do_print_resource_record(pw, identity_file,
1.462 djm 3736: rr_hostname, print_generic, opts, nopts);
1.269 djm 3737: if (n == 0)
3738: fatal("%s: %s", identity_file, strerror(errno));
1.138 jakob 3739: exit(0);
3740: } else {
3741:
3742: n += do_print_resource_record(pw,
1.325 djm 3743: _PATH_HOST_RSA_KEY_FILE, rr_hostname,
1.462 djm 3744: print_generic, opts, nopts);
1.472 ! djm 3745: #ifdef WITH_DSA
1.138 jakob 3746: n += do_print_resource_record(pw,
1.325 djm 3747: _PATH_HOST_DSA_KEY_FILE, rr_hostname,
1.462 djm 3748: print_generic, opts, nopts);
1.472 ! djm 3749: #endif
1.214 djm 3750: n += do_print_resource_record(pw,
1.325 djm 3751: _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
1.462 djm 3752: print_generic, opts, nopts);
1.244 logan 3753: n += do_print_resource_record(pw,
1.325 djm 3754: _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
1.462 djm 3755: print_generic, opts, nopts);
1.313 markus 3756: n += do_print_resource_record(pw,
1.325 djm 3757: _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
1.462 djm 3758: print_generic, opts, nopts);
1.138 jakob 3759: if (n == 0)
3760: fatal("no keys found.");
3761: exit(0);
3762: }
1.105 jakob 3763: }
1.107 djm 3764:
1.376 djm 3765: if (do_gen_candidates || do_screen_candidates) {
3766: if (argc <= 0)
3767: fatal("No output file specified");
3768: else if (argc > 1)
3769: fatal("Too many output files specified");
3770: }
1.107 djm 3771: if (do_gen_candidates) {
1.376 djm 3772: do_moduli_gen(argv[0], opts, nopts);
3773: return 0;
1.107 djm 3774: }
3775: if (do_screen_candidates) {
1.376 djm 3776: do_moduli_screen(argv[0], opts, nopts);
3777: return 0;
1.75 markus 3778: }
1.12 markus 3779:
1.206 stevesk 3780: if (gen_all_hostkeys) {
3781: do_gen_all_hostkeys(pw);
3782: return (0);
3783: }
3784:
1.133 djm 3785: if (key_type_name == NULL)
1.273 djm 3786: key_type_name = DEFAULT_KEY_TYPE_NAME;
1.133 djm 3787:
1.252 djm 3788: type = sshkey_type_from_name(key_type_name);
1.255 djm 3789: type_bits_valid(type, key_type_name, &bits);
1.206 stevesk 3790:
1.33 markus 3791: if (!quiet)
1.252 djm 3792: printf("Generating public/private %s key pair.\n",
3793: key_type_name);
1.362 markus 3794: switch (type) {
3795: case KEY_ECDSA_SK:
3796: case KEY_ED25519_SK:
1.380 djm 3797: for (i = 0; i < nopts; i++) {
3798: if (strcasecmp(opts[i], "no-touch-required") == 0) {
3799: sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
1.416 djm 3800: } else if (strcasecmp(opts[i], "verify-required") == 0) {
3801: sk_flags |= SSH_SK_USER_VERIFICATION_REQD;
1.380 djm 3802: } else if (strcasecmp(opts[i], "resident") == 0) {
3803: sk_flags |= SSH_SK_RESIDENT_KEY;
1.382 djm 3804: } else if (strncasecmp(opts[i], "device=", 7) == 0) {
3805: sk_device = xstrdup(opts[i] + 7);
3806: } else if (strncasecmp(opts[i], "user=", 5) == 0) {
3807: sk_user = xstrdup(opts[i] + 5);
1.395 djm 3808: } else if (strncasecmp(opts[i], "challenge=", 10) == 0) {
3809: if ((r = sshbuf_load_file(opts[i] + 10,
3810: &challenge)) != 0) {
1.421 djm 3811: fatal_r(r, "Unable to load FIDO "
3812: "enrollment challenge \"%s\"",
3813: opts[i] + 10);
1.395 djm 3814: }
3815: } else if (strncasecmp(opts[i],
3816: "write-attestation=", 18) == 0) {
1.420 djm 3817: sk_attestation_path = opts[i] + 18;
1.382 djm 3818: } else if (strncasecmp(opts[i],
3819: "application=", 12) == 0) {
3820: sk_application = xstrdup(opts[i] + 12);
1.396 djm 3821: if (strncmp(sk_application, "ssh:", 4) != 0) {
3822: fatal("FIDO application string must "
3823: "begin with \"ssh:\"");
3824: }
1.380 djm 3825: } else {
3826: fatal("Option \"%s\" is unsupported for "
3827: "FIDO authenticator enrollment", opts[i]);
3828: }
3829: }
1.395 djm 3830: if ((attest = sshbuf_new()) == NULL)
3831: fatal("sshbuf_new failed");
1.457 djm 3832: r = 0;
3833: for (i = 0 ;;) {
3834: if (!quiet) {
3835: printf("You may need to touch your "
3836: "authenticator%s to authorize key "
3837: "generation.\n",
3838: r == 0 ? "" : " again");
3839: }
1.379 djm 3840: fflush(stdout);
1.382 djm 3841: r = sshsk_enroll(type, sk_provider, sk_device,
3842: sk_application == NULL ? "ssh:" : sk_application,
1.395 djm 3843: sk_user, sk_flags, passphrase, challenge,
3844: &private, attest);
1.379 djm 3845: if (r == 0)
3846: break;
1.456 djm 3847: if (r == SSH_ERR_KEY_BAD_PERMISSIONS &&
3848: (sk_flags & SSH_SK_RESIDENT_KEY) != 0 &&
3849: (sk_flags & SSH_SK_FORCE_OPERATION) == 0 &&
3850: confirm_sk_overwrite(sk_application, sk_user)) {
3851: sk_flags |= SSH_SK_FORCE_OPERATION;
3852: continue;
3853: }
1.379 djm 3854: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 3855: fatal_r(r, "Key enrollment failed");
1.418 djm 3856: else if (passphrase != NULL) {
1.398 djm 3857: error("PIN incorrect");
1.381 djm 3858: freezero(passphrase, strlen(passphrase));
1.398 djm 3859: passphrase = NULL;
3860: }
1.457 djm 3861: if (++i >= 3)
1.398 djm 3862: fatal("Too many incorrect PINs");
1.397 naddy 3863: passphrase = read_passphrase("Enter PIN for "
3864: "authenticator: ", RP_ALLOW_STDIN);
1.373 djm 3865: }
1.398 djm 3866: if (passphrase != NULL) {
1.381 djm 3867: freezero(passphrase, strlen(passphrase));
1.398 djm 3868: passphrase = NULL;
3869: }
1.362 markus 3870: break;
3871: default:
3872: if ((r = sshkey_generate(type, bits, &private)) != 0)
3873: fatal("sshkey_generate failed");
3874: break;
3875: }
1.269 djm 3876: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 3877: fatal_r(r, "sshkey_from_private");
1.12 markus 3878:
3879: if (!have_identity)
3880: ask_filename(pw, "Enter file in which to save the key");
3881:
1.132 djm 3882: /* Create ~/.ssh directory if it doesn't already exist. */
1.413 dtucker 3883: hostfile_create_user_ssh_dir(identity_file, !quiet);
3884:
1.12 markus 3885: /* If the file already exists, ask the user to confirm. */
1.343 djm 3886: if (!confirm_overwrite(identity_file))
3887: exit(1);
1.12 markus 3888:
1.381 djm 3889: /* Determine the passphrase for the private key */
3890: passphrase = private_key_passphrase();
1.12 markus 3891: if (identity_comment) {
3892: strlcpy(comment, identity_comment, sizeof(comment));
3893: } else {
1.172 stevesk 3894: /* Create default comment field for the passphrase. */
1.12 markus 3895: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
3896: }
3897:
3898: /* Save the key with the given passphrase and comment. */
1.381 djm 3899: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 3900: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 3901: error_r(r, "Saving key \"%s\" failed", identity_file);
1.381 djm 3902: freezero(passphrase, strlen(passphrase));
1.12 markus 3903: exit(1);
3904: }
1.381 djm 3905: freezero(passphrase, strlen(passphrase));
1.252 djm 3906: sshkey_free(private);
1.12 markus 3907:
1.381 djm 3908: if (!quiet) {
1.387 djm 3909: printf("Your identification has been saved in %s\n",
1.381 djm 3910: identity_file);
3911: }
1.12 markus 3912:
3913: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 3914: if ((r = sshkey_save_public(public, identity_file, comment)) != 0)
3915: fatal_r(r, "Unable to save public key to %s", identity_file);
1.12 markus 3916:
3917: if (!quiet) {
1.259 djm 3918: fp = sshkey_fingerprint(public, fingerprint_hash,
1.251 djm 3919: SSH_FP_DEFAULT);
1.259 djm 3920: ra = sshkey_fingerprint(public, fingerprint_hash,
1.167 grunk 3921: SSH_FP_RANDOMART);
1.259 djm 3922: if (fp == NULL || ra == NULL)
3923: fatal("sshkey_fingerprint failed");
1.387 djm 3924: printf("Your public key has been saved in %s\n",
1.19 markus 3925: identity_file);
1.12 markus 3926: printf("The key fingerprint is:\n");
1.50 markus 3927: printf("%s %s\n", fp, comment);
1.167 grunk 3928: printf("The key's randomart image is:\n");
3929: printf("%s\n", ra);
1.227 djm 3930: free(ra);
3931: free(fp);
1.12 markus 3932: }
1.19 markus 3933:
1.420 djm 3934: if (sk_attestation_path != NULL)
3935: save_attestation(attest, sk_attestation_path);
3936:
1.395 djm 3937: sshbuf_free(attest);
1.252 djm 3938: sshkey_free(public);
1.395 djm 3939:
1.12 markus 3940: exit(0);
1.1 deraadt 3941: }
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