Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.466
1.466 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.465 2023/03/05 09:24:35 dtucker 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:
1.273 djm 64: #ifdef WITH_OPENSSL
65: # define DEFAULT_KEY_TYPE_NAME "rsa"
66: #else
67: # define DEFAULT_KEY_TYPE_NAME "ed25519"
68: #endif
69:
1.328 dtucker 70: /*
1.329 dtucker 71: * Default number of bits in the RSA, DSA and ECDSA keys. These value can be
72: * overridden on the command line.
73: *
74: * These values, with the exception of DSA, provide security equivalent to at
75: * least 128 bits of security according to NIST Special Publication 800-57:
76: * Recommendation for Key Management Part 1 rev 4 section 5.6.1.
77: * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
78: * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
79: * SHA1 we limit the DSA key size 1k bits.
1.328 dtucker 80: */
81: #define DEFAULT_BITS 3072
1.130 markus 82: #define DEFAULT_BITS_DSA 1024
1.203 naddy 83: #define DEFAULT_BITS_ECDSA 256
1.1 deraadt 84:
1.325 djm 85: static int quiet = 0;
1.182 djm 86:
1.8 markus 87: /* Flag indicating that we just want to see the key fingerprint */
1.325 djm 88: static int print_fingerprint = 0;
89: static int print_bubblebabble = 0;
1.8 markus 90:
1.251 djm 91: /* Hash algorithm to use for fingerprints. */
1.325 djm 92: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.251 djm 93:
1.10 markus 94: /* The identity file name, given on the command line or entered by the user. */
1.351 deraadt 95: static char identity_file[PATH_MAX];
1.325 djm 96: static int have_identity = 0;
1.1 deraadt 97:
98: /* This is set to the passphrase if given on the command line. */
1.325 djm 99: static char *identity_passphrase = NULL;
1.1 deraadt 100:
101: /* This is set to the new passphrase if given on the command line. */
1.325 djm 102: static char *identity_new_passphrase = NULL;
1.186 djm 103:
1.179 djm 104: /* Key type when certifying */
1.325 djm 105: static u_int cert_key_type = SSH2_CERT_TYPE_USER;
1.179 djm 106:
107: /* "key ID" of signed key */
1.325 djm 108: static char *cert_key_id = NULL;
1.179 djm 109:
110: /* Comma-separated list of principal names for certifying keys */
1.325 djm 111: static char *cert_principals = NULL;
1.179 djm 112:
113: /* Validity period for certificates */
1.325 djm 114: static u_int64_t cert_valid_from = 0;
115: static u_int64_t cert_valid_to = ~0ULL;
1.179 djm 116:
1.186 djm 117: /* Certificate options */
1.371 djm 118: #define CERTOPT_X_FWD (1)
119: #define CERTOPT_AGENT_FWD (1<<1)
120: #define CERTOPT_PORT_FWD (1<<2)
121: #define CERTOPT_PTY (1<<3)
122: #define CERTOPT_USER_RC (1<<4)
123: #define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5)
1.453 naddy 124: #define CERTOPT_REQUIRE_VERIFY (1<<6)
1.190 djm 125: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
126: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
1.325 djm 127: static u_int32_t certflags_flags = CERTOPT_DEFAULT;
128: static char *certflags_command = NULL;
129: static char *certflags_src_addr = NULL;
1.179 djm 130:
1.300 djm 131: /* Arbitrary extensions specified by user */
1.415 djm 132: struct cert_ext {
1.300 djm 133: char *key;
134: char *val;
135: int crit;
136: };
1.415 djm 137: static struct cert_ext *cert_ext;
138: static size_t ncert_ext;
1.300 djm 139:
1.193 djm 140: /* Conversion to/from various formats */
141: enum {
142: FMT_RFC4716,
143: FMT_PKCS8,
144: FMT_PEM
145: } convert_format = FMT_RFC4716;
1.33 markus 146:
1.325 djm 147: static char *key_type_name = NULL;
1.19 markus 148:
1.197 djm 149: /* Load key from this PKCS#11 provider */
1.325 djm 150: static char *pkcs11provider = NULL;
1.193 djm 151:
1.357 djm 152: /* FIDO/U2F provider to use */
153: static char *sk_provider = NULL;
154:
1.336 djm 155: /* Format for writing private keys */
156: static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
1.237 markus 157:
158: /* Cipher for new-format private keys */
1.336 djm 159: static char *openssh_format_cipher = NULL;
1.237 markus 160:
1.376 djm 161: /* Number of KDF rounds to derive new format keys. */
1.325 djm 162: static int rounds = 0;
1.237 markus 163:
1.10 markus 164: /* argv0 */
165: extern char *__progname;
1.1 deraadt 166:
1.325 djm 167: static char hostname[NI_MAXHOST];
1.19 markus 168:
1.274 djm 169: #ifdef WITH_OPENSSL
1.115 djm 170: /* moduli.c */
1.124 avsm 171: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.215 dtucker 172: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
173: unsigned long);
1.274 djm 174: #endif
1.115 djm 175:
1.63 itojun 176: static void
1.255 djm 177: type_bits_valid(int type, const char *name, u_int32_t *bitsp)
1.206 stevesk 178: {
1.269 djm 179: if (type == KEY_UNSPEC)
180: fatal("unknown key type %s", key_type_name);
1.209 djm 181: if (*bitsp == 0) {
1.271 djm 182: #ifdef WITH_OPENSSL
1.423 djm 183: int nid;
1.339 naddy 184:
185: switch(type) {
186: case KEY_DSA:
1.209 djm 187: *bitsp = DEFAULT_BITS_DSA;
1.339 naddy 188: break;
189: case KEY_ECDSA:
1.255 djm 190: if (name != NULL &&
191: (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
192: *bitsp = sshkey_curve_nid_to_bits(nid);
193: if (*bitsp == 0)
194: *bitsp = DEFAULT_BITS_ECDSA;
1.339 naddy 195: break;
196: case KEY_RSA:
197: *bitsp = DEFAULT_BITS;
198: break;
199: }
1.271 djm 200: #endif
1.206 stevesk 201: }
1.271 djm 202: #ifdef WITH_OPENSSL
1.303 djm 203: switch (type) {
204: case KEY_DSA:
205: if (*bitsp != 1024)
206: fatal("Invalid DSA key length: must be 1024 bits");
207: break;
208: case KEY_RSA:
209: if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
210: fatal("Invalid RSA key length: minimum is %d bits",
211: SSH_RSA_MINIMUM_MODULUS_SIZE);
1.339 naddy 212: else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
213: fatal("Invalid RSA key length: maximum is %d bits",
214: OPENSSL_RSA_MAX_MODULUS_BITS);
1.303 djm 215: break;
216: case KEY_ECDSA:
217: if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
218: fatal("Invalid ECDSA key length: valid lengths are "
219: "256, 384 or 521 bits");
220: }
1.246 markus 221: #endif
1.206 stevesk 222: }
223:
1.343 djm 224: /*
225: * Checks whether a file exists and, if so, asks the user whether they wish
226: * to overwrite it.
227: * Returns nonzero if the file does not already exist or if the user agrees to
228: * overwrite, or zero otherwise.
229: */
230: static int
231: confirm_overwrite(const char *filename)
232: {
233: char yesno[3];
234: struct stat st;
235:
236: if (stat(filename, &st) != 0)
237: return 1;
238: printf("%s already exists.\n", filename);
239: printf("Overwrite (y/n)? ");
240: fflush(stdout);
241: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
242: return 0;
243: if (yesno[0] != 'y' && yesno[0] != 'Y')
244: return 0;
245: return 1;
246: }
247:
1.206 stevesk 248: static void
1.10 markus 249: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 250: {
1.12 markus 251: char buf[1024];
1.35 markus 252: char *name = NULL;
253:
1.92 stevesk 254: if (key_type_name == NULL)
1.40 markus 255: name = _PATH_SSH_CLIENT_ID_RSA;
1.140 deraadt 256: else {
1.252 djm 257: switch (sshkey_type_from_name(key_type_name)) {
1.186 djm 258: case KEY_DSA_CERT:
1.92 stevesk 259: case KEY_DSA:
260: name = _PATH_SSH_CLIENT_ID_DSA;
261: break;
1.200 djm 262: case KEY_ECDSA_CERT:
263: case KEY_ECDSA:
264: name = _PATH_SSH_CLIENT_ID_ECDSA;
265: break;
1.357 djm 266: case KEY_ECDSA_SK_CERT:
267: case KEY_ECDSA_SK:
268: name = _PATH_SSH_CLIENT_ID_ECDSA_SK;
269: break;
1.186 djm 270: case KEY_RSA_CERT:
1.92 stevesk 271: case KEY_RSA:
272: name = _PATH_SSH_CLIENT_ID_RSA;
273: break;
1.238 markus 274: case KEY_ED25519:
275: case KEY_ED25519_CERT:
276: name = _PATH_SSH_CLIENT_ID_ED25519;
277: break;
1.362 markus 278: case KEY_ED25519_SK:
279: case KEY_ED25519_SK_CERT:
280: name = _PATH_SSH_CLIENT_ID_ED25519_SK;
281: break;
1.313 markus 282: case KEY_XMSS:
283: case KEY_XMSS_CERT:
284: name = _PATH_SSH_CLIENT_ID_XMSS;
285: break;
1.92 stevesk 286: default:
1.269 djm 287: fatal("bad key type");
1.92 stevesk 288: }
1.140 deraadt 289: }
1.269 djm 290: snprintf(identity_file, sizeof(identity_file),
291: "%s/%s", pw->pw_dir, name);
292: printf("%s (%s): ", prompt, identity_file);
293: fflush(stdout);
1.12 markus 294: if (fgets(buf, sizeof(buf), stdin) == NULL)
295: exit(1);
1.162 gilles 296: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 297: if (strcmp(buf, "") != 0)
298: strlcpy(identity_file, buf, sizeof(identity_file));
299: have_identity = 1;
1.7 markus 300: }
301:
1.252 djm 302: static struct sshkey *
1.342 djm 303: load_identity(const char *filename, char **commentp)
1.19 markus 304: {
1.52 markus 305: char *pass;
1.252 djm 306: struct sshkey *prv;
307: int r;
1.52 markus 308:
1.341 djm 309: if (commentp != NULL)
310: *commentp = NULL;
311: if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
1.252 djm 312: return prv;
313: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 314: fatal_r(r, "Load key \"%s\"", filename);
1.252 djm 315: if (identity_passphrase)
316: pass = xstrdup(identity_passphrase);
317: else
318: pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
1.341 djm 319: r = sshkey_load_private(filename, pass, &prv, commentp);
1.399 jsg 320: freezero(pass, strlen(pass));
1.252 djm 321: if (r != 0)
1.421 djm 322: fatal_r(r, "Load key \"%s\"", filename);
1.52 markus 323: return prv;
1.19 markus 324: }
325:
1.32 markus 326: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 327: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 328: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 329: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 330:
1.246 markus 331: #ifdef WITH_OPENSSL
1.63 itojun 332: static void
1.252 djm 333: do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
1.19 markus 334: {
1.337 djm 335: struct sshbuf *b;
336: char comment[61], *b64;
1.252 djm 337: int r;
1.19 markus 338:
1.337 djm 339: if ((b = sshbuf_new()) == NULL)
1.421 djm 340: fatal_f("sshbuf_new failed");
1.337 djm 341: if ((r = sshkey_putb(k, b)) != 0)
1.421 djm 342: fatal_fr(r, "put key");
1.337 djm 343: if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
1.421 djm 344: fatal_f("sshbuf_dtob64_string failed");
1.337 djm 345:
1.176 djm 346: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
347: snprintf(comment, sizeof(comment),
348: "%u-bit %s, converted by %s@%s from OpenSSH",
1.252 djm 349: sshkey_size(k), sshkey_type(k),
1.19 markus 350: pw->pw_name, hostname);
1.176 djm 351:
1.337 djm 352: sshkey_free(k);
353: sshbuf_free(b);
354:
1.176 djm 355: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.337 djm 356: fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
1.32 markus 357: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.337 djm 358: free(b64);
1.19 markus 359: exit(0);
360: }
361:
1.63 itojun 362: static void
1.252 djm 363: do_convert_to_pkcs8(struct sshkey *k)
1.193 djm 364: {
1.252 djm 365: switch (sshkey_type_plain(k->type)) {
1.193 djm 366: case KEY_RSA:
367: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
368: fatal("PEM_write_RSA_PUBKEY failed");
369: break;
370: case KEY_DSA:
371: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
372: fatal("PEM_write_DSA_PUBKEY failed");
373: break;
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;
392: case KEY_DSA:
393: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
394: fatal("PEM_write_DSA_PUBKEY failed");
395: break;
396: case KEY_ECDSA:
397: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
398: fatal("PEM_write_EC_PUBKEY failed");
1.193 djm 399: break;
400: default:
1.421 djm 401: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 402: }
403: exit(0);
404: }
405:
406: static void
407: do_convert_to(struct passwd *pw)
408: {
1.252 djm 409: struct sshkey *k;
1.193 djm 410: struct stat st;
1.252 djm 411: int r;
1.193 djm 412:
413: if (!have_identity)
414: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 415: if (stat(identity_file, &st) == -1)
1.193 djm 416: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.252 djm 417: if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
1.341 djm 418: k = load_identity(identity_file, NULL);
1.193 djm 419: switch (convert_format) {
420: case FMT_RFC4716:
421: do_convert_to_ssh2(pw, k);
422: break;
423: case FMT_PKCS8:
424: do_convert_to_pkcs8(k);
425: break;
426: case FMT_PEM:
427: do_convert_to_pem(k);
428: break;
429: default:
1.421 djm 430: fatal_f("unknown key format %d", convert_format);
1.193 djm 431: }
432: exit(0);
433: }
434:
1.252 djm 435: /*
436: * This is almost exactly the bignum1 encoding, but with 32 bit for length
437: * instead of 16.
438: */
1.193 djm 439: static void
1.252 djm 440: buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
1.32 markus 441: {
1.252 djm 442: u_int bytes, bignum_bits;
443: int r;
1.53 markus 444:
1.252 djm 445: if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
1.421 djm 446: fatal_fr(r, "parse");
1.252 djm 447: bytes = (bignum_bits + 7) / 8;
448: if (sshbuf_len(b) < bytes)
1.421 djm 449: fatal_f("input buffer too small: need %d have %zu",
450: bytes, sshbuf_len(b));
1.252 djm 451: if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
1.421 djm 452: fatal_f("BN_bin2bn failed");
1.252 djm 453: if ((r = sshbuf_consume(b, bytes)) != 0)
1.421 djm 454: fatal_fr(r, "consume");
1.32 markus 455: }
456:
1.252 djm 457: static struct sshkey *
1.337 djm 458: do_convert_private_ssh2(struct sshbuf *b)
1.32 markus 459: {
1.252 djm 460: struct sshkey *key = NULL;
1.64 markus 461: char *type, *cipher;
1.466 ! djm 462: const char *alg = NULL;
1.252 djm 463: u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
464: int r, rlen, ktype;
465: u_int magic, i1, i2, i3, i4;
466: size_t slen;
1.62 markus 467: u_long e;
1.321 djm 468: BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
469: BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
470: BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
471: BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
1.337 djm 472:
1.252 djm 473: if ((r = sshbuf_get_u32(b, &magic)) != 0)
1.421 djm 474: fatal_fr(r, "parse magic");
1.32 markus 475:
476: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
1.252 djm 477: error("bad magic 0x%x != 0x%x", magic,
478: SSH_COM_PRIVATE_KEY_MAGIC);
1.32 markus 479: return NULL;
480: }
1.252 djm 481: if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
482: (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
483: (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
484: (r = sshbuf_get_u32(b, &i2)) != 0 ||
485: (r = sshbuf_get_u32(b, &i3)) != 0 ||
486: (r = sshbuf_get_u32(b, &i4)) != 0)
1.421 djm 487: fatal_fr(r, "parse");
1.158 stevesk 488: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 489: if (strcmp(cipher, "none") != 0) {
490: error("unsupported cipher %s", cipher);
1.227 djm 491: free(cipher);
492: free(type);
1.32 markus 493: return NULL;
494: }
1.227 djm 495: free(cipher);
1.32 markus 496:
1.53 markus 497: if (strstr(type, "dsa")) {
498: ktype = KEY_DSA;
499: } else if (strstr(type, "rsa")) {
500: ktype = KEY_RSA;
501: } else {
1.227 djm 502: free(type);
1.32 markus 503: return NULL;
504: }
1.322 djm 505: if ((key = sshkey_new(ktype)) == NULL)
506: fatal("sshkey_new failed");
1.227 djm 507: free(type);
1.53 markus 508:
509: switch (key->type) {
510: case KEY_DSA:
1.321 djm 511: if ((dsa_p = BN_new()) == NULL ||
512: (dsa_q = BN_new()) == NULL ||
513: (dsa_g = BN_new()) == NULL ||
514: (dsa_pub_key = BN_new()) == NULL ||
515: (dsa_priv_key = BN_new()) == NULL)
1.421 djm 516: fatal_f("BN_new");
1.321 djm 517: buffer_get_bignum_bits(b, dsa_p);
518: buffer_get_bignum_bits(b, dsa_g);
519: buffer_get_bignum_bits(b, dsa_q);
520: buffer_get_bignum_bits(b, dsa_pub_key);
521: buffer_get_bignum_bits(b, dsa_priv_key);
522: if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
1.421 djm 523: fatal_f("DSA_set0_pqg failed");
1.321 djm 524: dsa_p = dsa_q = dsa_g = NULL; /* transferred */
525: if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
1.421 djm 526: fatal_f("DSA_set0_key failed");
1.321 djm 527: dsa_pub_key = dsa_priv_key = NULL; /* transferred */
1.53 markus 528: break;
529: case KEY_RSA:
1.252 djm 530: if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
531: (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
532: (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
1.421 djm 533: fatal_fr(r, "parse RSA");
1.252 djm 534: e = e1;
1.62 markus 535: debug("e %lx", e);
536: if (e < 30) {
537: e <<= 8;
1.252 djm 538: e += e2;
1.62 markus 539: debug("e %lx", e);
540: e <<= 8;
1.252 djm 541: e += e3;
1.62 markus 542: debug("e %lx", e);
543: }
1.321 djm 544: if ((rsa_e = BN_new()) == NULL)
1.421 djm 545: fatal_f("BN_new");
1.321 djm 546: if (!BN_set_word(rsa_e, e)) {
547: BN_clear_free(rsa_e);
1.252 djm 548: sshkey_free(key);
1.53 markus 549: return NULL;
550: }
1.321 djm 551: if ((rsa_n = BN_new()) == NULL ||
552: (rsa_d = BN_new()) == NULL ||
553: (rsa_p = BN_new()) == NULL ||
554: (rsa_q = BN_new()) == NULL ||
555: (rsa_iqmp = BN_new()) == NULL)
1.421 djm 556: fatal_f("BN_new");
1.321 djm 557: buffer_get_bignum_bits(b, rsa_d);
558: buffer_get_bignum_bits(b, rsa_n);
559: buffer_get_bignum_bits(b, rsa_iqmp);
560: buffer_get_bignum_bits(b, rsa_q);
561: buffer_get_bignum_bits(b, rsa_p);
562: if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
1.421 djm 563: fatal_f("RSA_set0_key failed");
1.321 djm 564: rsa_n = rsa_e = rsa_d = NULL; /* transferred */
565: if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
1.421 djm 566: fatal_f("RSA_set0_factors failed");
1.321 djm 567: rsa_p = rsa_q = NULL; /* transferred */
568: if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
1.421 djm 569: fatal_fr(r, "generate RSA parameters");
1.321 djm 570: BN_clear_free(rsa_iqmp);
1.466 ! djm 571: alg = "rsa-sha2-256";
1.53 markus 572: break;
573: }
1.252 djm 574: rlen = sshbuf_len(b);
1.85 deraadt 575: if (rlen != 0)
1.421 djm 576: error_f("remaining bytes in key blob %d", rlen);
1.64 markus 577:
578: /* try the key */
1.455 djm 579: if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data),
1.466 ! djm 580: alg, NULL, NULL, 0)) != 0)
1.455 djm 581: error_fr(r, "signing with converted key failed");
582: else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
1.466 ! djm 583: alg, 0, NULL)) != 0)
1.455 djm 584: error_fr(r, "verification with converted key failed");
585: if (r != 0) {
1.252 djm 586: sshkey_free(key);
587: free(sig);
588: return NULL;
589: }
1.227 djm 590: free(sig);
1.32 markus 591: return key;
592: }
593:
1.137 dtucker 594: static int
595: get_line(FILE *fp, char *line, size_t len)
596: {
597: int c;
598: size_t pos = 0;
599:
600: line[0] = '\0';
601: while ((c = fgetc(fp)) != EOF) {
1.269 djm 602: if (pos >= len - 1)
603: fatal("input line too long.");
1.140 deraadt 604: switch (c) {
1.137 dtucker 605: case '\r':
606: c = fgetc(fp);
1.269 djm 607: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
608: fatal("unget: %s", strerror(errno));
1.137 dtucker 609: return pos;
610: case '\n':
611: return pos;
612: }
613: line[pos++] = c;
614: line[pos] = '\0';
615: }
1.157 stevesk 616: /* We reached EOF */
617: return -1;
1.137 dtucker 618: }
619:
1.63 itojun 620: static void
1.252 djm 621: do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
1.19 markus 622: {
1.252 djm 623: int r, blen, escaped = 0;
1.98 markus 624: u_int len;
1.137 dtucker 625: char line[1024];
1.337 djm 626: struct sshbuf *buf;
1.19 markus 627: char encoded[8096];
628: FILE *fp;
629:
1.337 djm 630: if ((buf = sshbuf_new()) == NULL)
631: fatal("sshbuf_new failed");
1.191 djm 632: if ((fp = fopen(identity_file, "r")) == NULL)
633: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 634: encoded[0] = '\0';
1.137 dtucker 635: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
1.228 djm 636: if (blen > 0 && line[blen - 1] == '\\')
1.25 markus 637: escaped++;
1.19 markus 638: if (strncmp(line, "----", 4) == 0 ||
639: strstr(line, ": ") != NULL) {
1.32 markus 640: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 641: *private = 1;
1.64 markus 642: if (strstr(line, " END ") != NULL) {
643: break;
644: }
1.60 markus 645: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 646: continue;
647: }
1.25 markus 648: if (escaped) {
649: escaped--;
1.60 markus 650: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 651: continue;
1.19 markus 652: }
653: strlcat(encoded, line, sizeof(encoded));
654: }
1.98 markus 655: len = strlen(encoded);
656: if (((len % 4) == 3) &&
657: (encoded[len-1] == '=') &&
658: (encoded[len-2] == '=') &&
659: (encoded[len-3] == '='))
660: encoded[len-3] = '\0';
1.337 djm 661: if ((r = sshbuf_b64tod(buf, encoded)) != 0)
1.421 djm 662: fatal_fr(r, "base64 decode");
1.408 djm 663: if (*private) {
664: if ((*k = do_convert_private_ssh2(buf)) == NULL)
1.421 djm 665: fatal_f("private key conversion failed");
1.408 djm 666: } else if ((r = sshkey_fromb(buf, k)) != 0)
1.421 djm 667: fatal_fr(r, "parse key");
1.356 djm 668: sshbuf_free(buf);
1.193 djm 669: fclose(fp);
670: }
671:
672: static void
1.252 djm 673: do_convert_from_pkcs8(struct sshkey **k, int *private)
1.193 djm 674: {
675: EVP_PKEY *pubkey;
676: FILE *fp;
677:
678: if ((fp = fopen(identity_file, "r")) == NULL)
679: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
680: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
1.421 djm 681: fatal_f("%s is not a recognised public key format",
1.193 djm 682: identity_file);
683: }
684: fclose(fp);
1.321 djm 685: switch (EVP_PKEY_base_id(pubkey)) {
1.193 djm 686: case EVP_PKEY_RSA:
1.252 djm 687: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
688: fatal("sshkey_new failed");
1.193 djm 689: (*k)->type = KEY_RSA;
690: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
691: break;
692: case EVP_PKEY_DSA:
1.252 djm 693: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
694: fatal("sshkey_new failed");
1.193 djm 695: (*k)->type = KEY_DSA;
696: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
697: break;
1.200 djm 698: case EVP_PKEY_EC:
1.252 djm 699: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
700: fatal("sshkey_new failed");
1.200 djm 701: (*k)->type = KEY_ECDSA;
702: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
1.252 djm 703: (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
1.200 djm 704: break;
1.193 djm 705: default:
1.421 djm 706: fatal_f("unsupported pubkey type %d",
1.321 djm 707: EVP_PKEY_base_id(pubkey));
1.193 djm 708: }
709: EVP_PKEY_free(pubkey);
710: return;
711: }
712:
713: static void
1.252 djm 714: do_convert_from_pem(struct sshkey **k, int *private)
1.193 djm 715: {
716: FILE *fp;
717: RSA *rsa;
718:
719: if ((fp = fopen(identity_file, "r")) == NULL)
720: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
721: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
1.252 djm 722: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
723: fatal("sshkey_new failed");
1.193 djm 724: (*k)->type = KEY_RSA;
725: (*k)->rsa = rsa;
726: fclose(fp);
727: return;
728: }
1.421 djm 729: fatal_f("unrecognised raw private key format");
1.193 djm 730: }
731:
732: static void
733: do_convert_from(struct passwd *pw)
734: {
1.252 djm 735: struct sshkey *k = NULL;
736: int r, private = 0, ok = 0;
1.193 djm 737: struct stat st;
738:
739: if (!have_identity)
740: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 741: if (stat(identity_file, &st) == -1)
1.193 djm 742: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
743:
744: switch (convert_format) {
745: case FMT_RFC4716:
746: do_convert_from_ssh2(pw, &k, &private);
747: break;
748: case FMT_PKCS8:
749: do_convert_from_pkcs8(&k, &private);
750: break;
751: case FMT_PEM:
752: do_convert_from_pem(&k, &private);
753: break;
754: default:
1.421 djm 755: fatal_f("unknown key format %d", convert_format);
1.193 djm 756: }
757:
1.260 djm 758: if (!private) {
1.252 djm 759: if ((r = sshkey_write(k, stdout)) == 0)
760: ok = 1;
1.193 djm 761: if (ok)
762: fprintf(stdout, "\n");
1.260 djm 763: } else {
1.193 djm 764: switch (k->type) {
765: case KEY_DSA:
766: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
767: NULL, 0, NULL, NULL);
768: break;
1.200 djm 769: case KEY_ECDSA:
770: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
771: NULL, 0, NULL, NULL);
772: break;
1.193 djm 773: case KEY_RSA:
774: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
775: NULL, 0, NULL, NULL);
776: break;
777: default:
1.421 djm 778: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 779: }
780: }
781:
1.269 djm 782: if (!ok)
783: fatal("key write failed");
1.252 djm 784: sshkey_free(k);
1.19 markus 785: exit(0);
786: }
1.246 markus 787: #endif
1.19 markus 788:
1.63 itojun 789: static void
1.19 markus 790: do_print_public(struct passwd *pw)
791: {
1.252 djm 792: struct sshkey *prv;
1.19 markus 793: struct stat st;
1.252 djm 794: int r;
1.341 djm 795: char *comment = NULL;
1.19 markus 796:
797: if (!have_identity)
798: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 799: if (stat(identity_file, &st) == -1)
1.269 djm 800: fatal("%s: %s", identity_file, strerror(errno));
1.341 djm 801: prv = load_identity(identity_file, &comment);
1.252 djm 802: if ((r = sshkey_write(prv, stdout)) != 0)
1.421 djm 803: fatal_fr(r, "write key");
1.341 djm 804: if (comment != NULL && *comment != '\0')
805: fprintf(stdout, " %s", comment);
1.19 markus 806: fprintf(stdout, "\n");
1.419 djm 807: if (sshkey_is_sk(prv)) {
808: debug("sk_application: \"%s\", sk_flags 0x%02x",
809: prv->sk_application, prv->sk_flags);
810: }
811: sshkey_free(prv);
1.341 djm 812: free(comment);
1.19 markus 813: exit(0);
814: }
815:
1.66 markus 816: static void
1.197 djm 817: do_download(struct passwd *pw)
1.75 markus 818: {
1.177 markus 819: #ifdef ENABLE_PKCS11
1.252 djm 820: struct sshkey **keys = NULL;
1.177 markus 821: int i, nkeys;
1.252 djm 822: enum sshkey_fp_rep rep;
1.251 djm 823: int fptype;
1.392 djm 824: char *fp, *ra, **comments = NULL;
1.222 djm 825:
1.251 djm 826: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
827: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.75 markus 828:
1.327 benno 829: pkcs11_init(1);
1.392 djm 830: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);
1.177 markus 831: if (nkeys <= 0)
832: fatal("cannot read public key from pkcs11");
833: for (i = 0; i < nkeys; i++) {
1.221 djm 834: if (print_fingerprint) {
1.252 djm 835: fp = sshkey_fingerprint(keys[i], fptype, rep);
836: ra = sshkey_fingerprint(keys[i], fingerprint_hash,
1.221 djm 837: SSH_FP_RANDOMART);
1.259 djm 838: if (fp == NULL || ra == NULL)
1.421 djm 839: fatal_f("sshkey_fingerprint fail");
1.252 djm 840: printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
841: fp, sshkey_type(keys[i]));
1.325 djm 842: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.221 djm 843: printf("%s\n", ra);
1.227 djm 844: free(ra);
845: free(fp);
1.221 djm 846: } else {
1.252 djm 847: (void) sshkey_write(keys[i], stdout); /* XXX check */
1.392 djm 848: fprintf(stdout, "%s%s\n",
849: *(comments[i]) == '\0' ? "" : " ", comments[i]);
1.221 djm 850: }
1.392 djm 851: free(comments[i]);
1.252 djm 852: sshkey_free(keys[i]);
1.97 markus 853: }
1.392 djm 854: free(comments);
1.227 djm 855: free(keys);
1.177 markus 856: pkcs11_terminate();
1.75 markus 857: exit(0);
1.177 markus 858: #else
859: fatal("no pkcs11 support");
860: #endif /* ENABLE_PKCS11 */
1.75 markus 861: }
1.66 markus 862:
1.279 djm 863: static struct sshkey *
864: try_read_key(char **cpp)
865: {
866: struct sshkey *ret;
867: int r;
868:
869: if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
870: fatal("sshkey_new failed");
871: if ((r = sshkey_read(ret, cpp)) == 0)
872: return ret;
873: /* Not a key */
874: sshkey_free(ret);
875: return NULL;
876: }
877:
1.63 itojun 878: static void
1.279 djm 879: fingerprint_one_key(const struct sshkey *public, const char *comment)
1.8 markus 880: {
1.279 djm 881: char *fp = NULL, *ra = NULL;
1.252 djm 882: enum sshkey_fp_rep rep;
1.251 djm 883: int fptype;
1.12 markus 884:
1.251 djm 885: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
886: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.279 djm 887: fp = sshkey_fingerprint(public, fptype, rep);
888: ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
889: if (fp == NULL || ra == NULL)
1.421 djm 890: fatal_f("sshkey_fingerprint failed");
1.294 djm 891: mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
1.279 djm 892: comment ? comment : "no comment", sshkey_type(public));
1.325 djm 893: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.279 djm 894: printf("%s\n", ra);
895: free(ra);
896: free(fp);
897: }
898:
899: static void
900: fingerprint_private(const char *path)
901: {
902: struct stat st;
903: char *comment = NULL;
1.407 djm 904: struct sshkey *privkey = NULL, *pubkey = NULL;
1.279 djm 905: int r;
906:
1.333 deraadt 907: if (stat(identity_file, &st) == -1)
1.279 djm 908: fatal("%s: %s", path, strerror(errno));
1.407 djm 909: if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)
1.421 djm 910: debug_r(r, "load public \"%s\"", path);
1.407 djm 911: if (pubkey == NULL || comment == NULL || *comment == '\0') {
912: free(comment);
913: if ((r = sshkey_load_private(path, NULL,
914: &privkey, &comment)) != 0)
1.421 djm 915: debug_r(r, "load private \"%s\"", path);
1.407 djm 916: }
917: if (pubkey == NULL && privkey == NULL)
918: fatal("%s is not a key file.", path);
919:
920: fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);
921: sshkey_free(pubkey);
922: sshkey_free(privkey);
1.279 djm 923: free(comment);
924: }
925:
926: static void
927: do_fingerprint(struct passwd *pw)
928: {
929: FILE *f;
930: struct sshkey *public = NULL;
1.317 markus 931: char *comment = NULL, *cp, *ep, *line = NULL;
932: size_t linesize = 0;
1.279 djm 933: int i, invalid = 1;
934: const char *path;
1.289 djm 935: u_long lnum = 0;
1.279 djm 936:
1.12 markus 937: if (!have_identity)
938: ask_filename(pw, "Enter file in which the key is");
1.279 djm 939: path = identity_file;
1.15 markus 940:
1.279 djm 941: if (strcmp(identity_file, "-") == 0) {
942: f = stdin;
943: path = "(stdin)";
944: } else if ((f = fopen(path, "r")) == NULL)
945: fatal("%s: %s: %s", __progname, path, strerror(errno));
946:
1.317 markus 947: while (getline(&line, &linesize, f) != -1) {
948: lnum++;
1.279 djm 949: cp = line;
950: cp[strcspn(cp, "\n")] = '\0';
951: /* Trim leading space and comments */
952: cp = line + strspn(line, " \t");
953: if (*cp == '#' || *cp == '\0')
954: continue;
1.191 djm 955:
1.279 djm 956: /*
957: * Input may be plain keys, private keys, authorized_keys
958: * or known_hosts.
959: */
960:
961: /*
962: * Try private keys first. Assume a key is private if
963: * "SSH PRIVATE KEY" appears on the first line and we're
964: * not reading from stdin (XXX support private keys on stdin).
965: */
966: if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
1.280 djm 967: strstr(cp, "PRIVATE KEY") != NULL) {
1.317 markus 968: free(line);
1.279 djm 969: fclose(f);
970: fingerprint_private(path);
971: exit(0);
972: }
973:
974: /*
975: * If it's not a private key, then this must be prepared to
976: * accept a public key prefixed with a hostname or options.
977: * Try a bare key first, otherwise skip the leading stuff.
978: */
979: if ((public = try_read_key(&cp)) == NULL) {
980: i = strtol(cp, &ep, 10);
981: if (i == 0 || ep == NULL ||
982: (*ep != ' ' && *ep != '\t')) {
983: int quoted = 0;
984:
985: comment = cp;
986: for (; *cp && (quoted || (*cp != ' ' &&
987: *cp != '\t')); cp++) {
988: if (*cp == '\\' && cp[1] == '"')
989: cp++; /* Skip both */
990: else if (*cp == '"')
991: quoted = !quoted;
992: }
993: if (!*cp)
994: continue;
995: *cp++ = '\0';
996: }
1.191 djm 997: }
1.279 djm 998: /* Retry after parsing leading hostname/key options */
999: if (public == NULL && (public = try_read_key(&cp)) == NULL) {
1.289 djm 1000: debug("%s:%lu: not a public key", path, lnum);
1.191 djm 1001: continue;
1002: }
1003:
1.279 djm 1004: /* Find trailing comment, if any */
1005: for (; *cp == ' ' || *cp == '\t'; cp++)
1.191 djm 1006: ;
1.279 djm 1007: if (*cp != '\0' && *cp != '#')
1.191 djm 1008: comment = cp;
1.279 djm 1009:
1010: fingerprint_one_key(public, comment);
1.252 djm 1011: sshkey_free(public);
1.279 djm 1012: invalid = 0; /* One good key in the file is sufficient */
1.15 markus 1013: }
1.191 djm 1014: fclose(f);
1.317 markus 1015: free(line);
1.191 djm 1016:
1.269 djm 1017: if (invalid)
1.279 djm 1018: fatal("%s is not a public key file.", path);
1.12 markus 1019: exit(0);
1.8 markus 1020: }
1021:
1.119 djm 1022: static void
1.206 stevesk 1023: do_gen_all_hostkeys(struct passwd *pw)
1024: {
1025: struct {
1026: char *key_type;
1027: char *key_type_display;
1028: char *path;
1029: } key_types[] = {
1.267 djm 1030: #ifdef WITH_OPENSSL
1.206 stevesk 1031: { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
1032: { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
1.267 djm 1033: #endif /* WITH_OPENSSL */
1.238 markus 1034: { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
1.313 markus 1035: #ifdef WITH_XMSS
1036: { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
1037: #endif /* WITH_XMSS */
1.206 stevesk 1038: { NULL, NULL, NULL }
1039: };
1040:
1.340 dtucker 1041: u_int32_t bits = 0;
1.206 stevesk 1042: int first = 0;
1043: struct stat st;
1.252 djm 1044: struct sshkey *private, *public;
1.307 djm 1045: char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
1.252 djm 1046: int i, type, fd, r;
1.206 stevesk 1047:
1048: for (i = 0; key_types[i].key_type; i++) {
1.307 djm 1049: public = private = NULL;
1050: prv_tmp = pub_tmp = prv_file = pub_file = NULL;
1051:
1052: xasprintf(&prv_file, "%s%s",
1053: identity_file, key_types[i].path);
1054:
1055: /* Check whether private key exists and is not zero-length */
1056: if (stat(prv_file, &st) == 0) {
1057: if (st.st_size != 0)
1058: goto next;
1059: } else if (errno != ENOENT) {
1.269 djm 1060: error("Could not stat %s: %s", key_types[i].path,
1.206 stevesk 1061: strerror(errno));
1.307 djm 1062: goto failnext;
1.206 stevesk 1063: }
1064:
1.307 djm 1065: /*
1066: * Private key doesn't exist or is invalid; proceed with
1067: * key generation.
1068: */
1069: xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
1070: identity_file, key_types[i].path);
1071: xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
1072: identity_file, key_types[i].path);
1073: xasprintf(&pub_file, "%s%s.pub",
1074: identity_file, key_types[i].path);
1075:
1.206 stevesk 1076: if (first == 0) {
1077: first = 1;
1078: printf("%s: generating new host keys: ", __progname);
1079: }
1080: printf("%s ", key_types[i].key_type_display);
1081: fflush(stdout);
1.252 djm 1082: type = sshkey_type_from_name(key_types[i].key_type);
1.307 djm 1083: if ((fd = mkstemp(prv_tmp)) == -1) {
1.409 djm 1084: error("Could not save your private key in %s: %s",
1.307 djm 1085: prv_tmp, strerror(errno));
1086: goto failnext;
1087: }
1.409 djm 1088: (void)close(fd); /* just using mkstemp() to reserve a name */
1.206 stevesk 1089: bits = 0;
1.255 djm 1090: type_bits_valid(type, NULL, &bits);
1.252 djm 1091: if ((r = sshkey_generate(type, bits, &private)) != 0) {
1.421 djm 1092: error_r(r, "sshkey_generate failed");
1.307 djm 1093: goto failnext;
1.206 stevesk 1094: }
1.252 djm 1095: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1096: fatal_fr(r, "sshkey_from_private");
1.206 stevesk 1097: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1098: hostname);
1.307 djm 1099: if ((r = sshkey_save_private(private, prv_tmp, "",
1.336 djm 1100: comment, private_key_format, openssh_format_cipher,
1101: rounds)) != 0) {
1.421 djm 1102: error_r(r, "Saving key \"%s\" failed", prv_tmp);
1.307 djm 1103: goto failnext;
1.206 stevesk 1104: }
1.307 djm 1105: if ((fd = mkstemp(pub_tmp)) == -1) {
1106: error("Could not save your public key in %s: %s",
1107: pub_tmp, strerror(errno));
1108: goto failnext;
1.206 stevesk 1109: }
1.307 djm 1110: (void)fchmod(fd, 0644);
1.409 djm 1111: (void)close(fd);
1112: if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {
1.421 djm 1113: error_r(r, "Unable to save public key to %s",
1114: identity_file);
1.307 djm 1115: goto failnext;
1116: }
1117:
1118: /* Rename temporary files to their permanent locations. */
1119: if (rename(pub_tmp, pub_file) != 0) {
1120: error("Unable to move %s into position: %s",
1121: pub_file, strerror(errno));
1122: goto failnext;
1123: }
1124: if (rename(prv_tmp, prv_file) != 0) {
1125: error("Unable to move %s into position: %s",
1126: key_types[i].path, strerror(errno));
1127: failnext:
1.206 stevesk 1128: first = 0;
1.307 djm 1129: goto next;
1.206 stevesk 1130: }
1.307 djm 1131: next:
1132: sshkey_free(private);
1.252 djm 1133: sshkey_free(public);
1.307 djm 1134: free(prv_tmp);
1135: free(pub_tmp);
1136: free(prv_file);
1137: free(pub_file);
1.206 stevesk 1138: }
1139: if (first != 0)
1140: printf("\n");
1141: }
1142:
1.256 djm 1143: struct known_hosts_ctx {
1.257 djm 1144: const char *host; /* Hostname searched for in find/delete case */
1145: FILE *out; /* Output file, stdout for find_hosts case */
1146: int has_unhashed; /* When hashing, original had unhashed hosts */
1147: int found_key; /* For find/delete, host was found */
1148: int invalid; /* File contained invalid items; don't delete */
1.325 djm 1149: int hash_hosts; /* Hash hostnames as we go */
1150: int find_host; /* Search for specific hostname */
1151: int delete_host; /* Delete host from known_hosts */
1.256 djm 1152: };
1153:
1154: static int
1155: known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1.119 djm 1156: {
1.256 djm 1157: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1158: char *hashed, *cp, *hosts, *ohosts;
1159: int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1.298 dtucker 1160: int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1.256 djm 1161:
1.262 djm 1162: switch (l->status) {
1163: case HKF_STATUS_OK:
1164: case HKF_STATUS_MATCHED:
1165: /*
1166: * Don't hash hosts already already hashed, with wildcard
1167: * characters or a CA/revocation marker.
1168: */
1.296 djm 1169: if (was_hashed || has_wild || l->marker != MRK_NONE) {
1.262 djm 1170: fprintf(ctx->out, "%s\n", l->line);
1.325 djm 1171: if (has_wild && !ctx->find_host) {
1.297 dtucker 1172: logit("%s:%lu: ignoring host name "
1.269 djm 1173: "with wildcard: %.64s", l->path,
1.262 djm 1174: l->linenum, l->hosts);
1175: }
1176: return 0;
1177: }
1178: /*
1179: * Split any comma-separated hostnames from the host list,
1180: * hash and store separately.
1181: */
1182: ohosts = hosts = xstrdup(l->hosts);
1183: while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1.299 djm 1184: lowercase(cp);
1.262 djm 1185: if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1186: fatal("hash_host failed");
1187: fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1.438 dtucker 1188: free(hashed);
1.262 djm 1189: ctx->has_unhashed = 1;
1190: }
1191: free(ohosts);
1192: return 0;
1193: case HKF_STATUS_INVALID:
1194: /* Retain invalid lines, but mark file as invalid. */
1.256 djm 1195: ctx->invalid = 1;
1.297 dtucker 1196: logit("%s:%lu: invalid line", l->path, l->linenum);
1.262 djm 1197: /* FALLTHROUGH */
1198: default:
1.256 djm 1199: fprintf(ctx->out, "%s\n", l->line);
1200: return 0;
1201: }
1.262 djm 1202: /* NOTREACHED */
1203: return -1;
1.256 djm 1204: }
1205:
1206: static int
1207: known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1208: {
1209: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1.272 djm 1210: enum sshkey_fp_rep rep;
1211: int fptype;
1.338 djm 1212: char *fp = NULL, *ra = NULL;
1.272 djm 1213:
1214: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1215: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.256 djm 1216:
1.262 djm 1217: if (l->status == HKF_STATUS_MATCHED) {
1.325 djm 1218: if (ctx->delete_host) {
1.256 djm 1219: if (l->marker != MRK_NONE) {
1220: /* Don't remove CA and revocation lines */
1221: fprintf(ctx->out, "%s\n", l->line);
1222: } else {
1223: /*
1224: * Hostname matches and has no CA/revoke
1225: * marker, delete it by *not* writing the
1226: * line to ctx->out.
1227: */
1228: ctx->found_key = 1;
1229: if (!quiet)
1.297 dtucker 1230: printf("# Host %s found: line %lu\n",
1.256 djm 1231: ctx->host, l->linenum);
1232: }
1233: return 0;
1.325 djm 1234: } else if (ctx->find_host) {
1.256 djm 1235: ctx->found_key = 1;
1236: if (!quiet) {
1.297 dtucker 1237: printf("# Host %s found: line %lu %s\n",
1.256 djm 1238: ctx->host,
1239: l->linenum, l->marker == MRK_CA ? "CA" :
1240: (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1241: }
1.325 djm 1242: if (ctx->hash_hosts)
1.256 djm 1243: known_hosts_hash(l, ctx);
1.272 djm 1244: else if (print_fingerprint) {
1245: fp = sshkey_fingerprint(l->key, fptype, rep);
1.338 djm 1246: ra = sshkey_fingerprint(l->key,
1247: fingerprint_hash, SSH_FP_RANDOMART);
1248: if (fp == NULL || ra == NULL)
1.421 djm 1249: fatal_f("sshkey_fingerprint failed");
1.385 claudio 1250: mprintf("%s %s %s%s%s\n", ctx->host,
1251: sshkey_type(l->key), fp,
1252: l->comment[0] ? " " : "",
1253: l->comment);
1.338 djm 1254: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1255: printf("%s\n", ra);
1256: free(ra);
1.272 djm 1257: free(fp);
1258: } else
1.256 djm 1259: fprintf(ctx->out, "%s\n", l->line);
1260: return 0;
1261: }
1.325 djm 1262: } else if (ctx->delete_host) {
1.256 djm 1263: /* Retain non-matching hosts when deleting */
1264: if (l->status == HKF_STATUS_INVALID) {
1265: ctx->invalid = 1;
1.297 dtucker 1266: logit("%s:%lu: invalid line", l->path, l->linenum);
1.256 djm 1267: }
1268: fprintf(ctx->out, "%s\n", l->line);
1.166 djm 1269: }
1.256 djm 1270: return 0;
1.119 djm 1271: }
1272:
1273: static void
1.325 djm 1274: do_known_hosts(struct passwd *pw, const char *name, int find_host,
1275: int delete_host, int hash_hosts)
1.119 djm 1276: {
1.258 deraadt 1277: char *cp, tmp[PATH_MAX], old[PATH_MAX];
1.257 djm 1278: int r, fd, oerrno, inplace = 0;
1.256 djm 1279: struct known_hosts_ctx ctx;
1.272 djm 1280: u_int foreach_options;
1.410 djm 1281: struct stat sb;
1.119 djm 1282:
1283: if (!have_identity) {
1284: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1285: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1286: sizeof(identity_file))
1287: fatal("Specified known hosts path too long");
1.227 djm 1288: free(cp);
1.119 djm 1289: have_identity = 1;
1290: }
1.410 djm 1291: if (stat(identity_file, &sb) != 0)
1292: fatal("Cannot stat %s: %s", identity_file, strerror(errno));
1.119 djm 1293:
1.256 djm 1294: memset(&ctx, 0, sizeof(ctx));
1295: ctx.out = stdout;
1296: ctx.host = name;
1.325 djm 1297: ctx.hash_hosts = hash_hosts;
1298: ctx.find_host = find_host;
1299: ctx.delete_host = delete_host;
1.256 djm 1300:
1.119 djm 1301: /*
1302: * Find hosts goes to stdout, hash and deletions happen in-place
1303: * A corner case is ssh-keygen -HF foo, which should go to stdout
1304: */
1305: if (!find_host && (hash_hosts || delete_host)) {
1306: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1307: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1308: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1309: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1310: fatal("known_hosts path too long");
1311: umask(077);
1.256 djm 1312: if ((fd = mkstemp(tmp)) == -1)
1.119 djm 1313: fatal("mkstemp: %s", strerror(errno));
1.256 djm 1314: if ((ctx.out = fdopen(fd, "w")) == NULL) {
1315: oerrno = errno;
1.119 djm 1316: unlink(tmp);
1.256 djm 1317: fatal("fdopen: %s", strerror(oerrno));
1.119 djm 1318: }
1.463 dtucker 1319: (void)fchmod(fd, sb.st_mode & 0644);
1.257 djm 1320: inplace = 1;
1.119 djm 1321: }
1.256 djm 1322: /* XXX support identity_file == "-" for stdin */
1.272 djm 1323: foreach_options = find_host ? HKF_WANT_MATCH : 0;
1324: foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1.316 djm 1325: if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
1.315 djm 1326: known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
1.427 djm 1327: foreach_options, 0)) != 0) {
1.284 deraadt 1328: if (inplace)
1329: unlink(tmp);
1.421 djm 1330: fatal_fr(r, "hostkeys_foreach");
1.284 deraadt 1331: }
1.119 djm 1332:
1.257 djm 1333: if (inplace)
1.256 djm 1334: fclose(ctx.out);
1.119 djm 1335:
1.256 djm 1336: if (ctx.invalid) {
1.269 djm 1337: error("%s is not a valid known_hosts file.", identity_file);
1.257 djm 1338: if (inplace) {
1.269 djm 1339: error("Not replacing existing known_hosts "
1340: "file because of errors");
1.119 djm 1341: unlink(tmp);
1342: }
1343: exit(1);
1.256 djm 1344: } else if (delete_host && !ctx.found_key) {
1.269 djm 1345: logit("Host %s not found in %s", name, identity_file);
1.277 djm 1346: if (inplace)
1347: unlink(tmp);
1.257 djm 1348: } else if (inplace) {
1.119 djm 1349: /* Backup existing file */
1350: if (unlink(old) == -1 && errno != ENOENT)
1351: fatal("unlink %.100s: %s", old, strerror(errno));
1352: if (link(identity_file, old) == -1)
1353: fatal("link %.100s to %.100s: %s", identity_file, old,
1354: strerror(errno));
1355: /* Move new one into place */
1356: if (rename(tmp, identity_file) == -1) {
1357: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1358: strerror(errno));
1359: unlink(tmp);
1360: unlink(old);
1361: exit(1);
1362: }
1363:
1.269 djm 1364: printf("%s updated.\n", identity_file);
1365: printf("Original contents retained as %s\n", old);
1.256 djm 1366: if (ctx.has_unhashed) {
1.269 djm 1367: logit("WARNING: %s contains unhashed entries", old);
1368: logit("Delete this file to ensure privacy "
1369: "of hostnames");
1.119 djm 1370: }
1371: }
1372:
1.256 djm 1373: exit (find_host && !ctx.found_key);
1.119 djm 1374: }
1375:
1.13 deraadt 1376: /*
1377: * Perform changing a passphrase. The argument is the passwd structure
1378: * for the current user.
1379: */
1.63 itojun 1380: static void
1.7 markus 1381: do_change_passphrase(struct passwd *pw)
1382: {
1.12 markus 1383: char *comment;
1384: char *old_passphrase, *passphrase1, *passphrase2;
1385: struct stat st;
1.252 djm 1386: struct sshkey *private;
1387: int r;
1.12 markus 1388:
1389: if (!have_identity)
1390: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1391: if (stat(identity_file, &st) == -1)
1.269 djm 1392: fatal("%s: %s", identity_file, strerror(errno));
1.12 markus 1393: /* Try to load the file with empty passphrase. */
1.252 djm 1394: r = sshkey_load_private(identity_file, "", &private, &comment);
1395: if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.12 markus 1396: if (identity_passphrase)
1397: old_passphrase = xstrdup(identity_passphrase);
1398: else
1.65 markus 1399: old_passphrase =
1400: read_passphrase("Enter old passphrase: ",
1401: RP_ALLOW_STDIN);
1.252 djm 1402: r = sshkey_load_private(identity_file, old_passphrase,
1403: &private, &comment);
1.399 jsg 1404: freezero(old_passphrase, strlen(old_passphrase));
1.252 djm 1405: if (r != 0)
1406: goto badkey;
1407: } else if (r != 0) {
1408: badkey:
1.421 djm 1409: fatal_r(r, "Failed to load key %s", identity_file);
1.12 markus 1410: }
1.266 djm 1411: if (comment)
1.294 djm 1412: mprintf("Key has comment '%s'\n", comment);
1.12 markus 1413:
1414: /* Ask the new passphrase (twice). */
1415: if (identity_new_passphrase) {
1416: passphrase1 = xstrdup(identity_new_passphrase);
1417: passphrase2 = NULL;
1418: } else {
1419: passphrase1 =
1.65 markus 1420: read_passphrase("Enter new passphrase (empty for no "
1421: "passphrase): ", RP_ALLOW_STDIN);
1422: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1423: RP_ALLOW_STDIN);
1.12 markus 1424:
1425: /* Verify that they are the same. */
1426: if (strcmp(passphrase1, passphrase2) != 0) {
1.240 djm 1427: explicit_bzero(passphrase1, strlen(passphrase1));
1428: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1429: free(passphrase1);
1430: free(passphrase2);
1.12 markus 1431: printf("Pass phrases do not match. Try again.\n");
1432: exit(1);
1433: }
1434: /* Destroy the other copy. */
1.399 jsg 1435: freezero(passphrase2, strlen(passphrase2));
1.12 markus 1436: }
1437:
1438: /* Save the file using the new passphrase. */
1.252 djm 1439: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 1440: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 1441: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1442: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1443: sshkey_free(private);
1.227 djm 1444: free(comment);
1.12 markus 1445: exit(1);
1446: }
1447: /* Destroy the passphrase and the copy of the key in memory. */
1.399 jsg 1448: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1449: sshkey_free(private); /* Destroys contents */
1.227 djm 1450: free(comment);
1.1 deraadt 1451:
1.12 markus 1452: printf("Your identification has been saved with the new passphrase.\n");
1453: exit(0);
1.1 deraadt 1454: }
1455:
1.105 jakob 1456: /*
1457: * Print the SSHFP RR.
1458: */
1.138 jakob 1459: static int
1.325 djm 1460: do_print_resource_record(struct passwd *pw, char *fname, char *hname,
1.462 djm 1461: int print_generic, char * const *opts, size_t nopts)
1.105 jakob 1462: {
1.252 djm 1463: struct sshkey *public;
1.105 jakob 1464: char *comment = NULL;
1465: struct stat st;
1.462 djm 1466: int r, hash = -1;
1467: size_t i;
1.105 jakob 1468:
1.462 djm 1469: for (i = 0; i < nopts; i++) {
1470: if (strncasecmp(opts[i], "hashalg=", 8) == 0) {
1471: if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1)
1472: fatal("Unsupported hash algorithm");
1473: } else {
1474: error("Invalid option \"%s\"", opts[i]);
1475: return SSH_ERR_INVALID_ARGUMENT;
1476: }
1477: }
1.138 jakob 1478: if (fname == NULL)
1.421 djm 1479: fatal_f("no filename");
1.333 deraadt 1480: if (stat(fname, &st) == -1) {
1.138 jakob 1481: if (errno == ENOENT)
1482: return 0;
1.269 djm 1483: fatal("%s: %s", fname, strerror(errno));
1.105 jakob 1484: }
1.269 djm 1485: if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1.421 djm 1486: fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);
1.462 djm 1487: export_dns_rr(hname, public, stdout, print_generic, hash);
1.252 djm 1488: sshkey_free(public);
1489: free(comment);
1490: return 1;
1.105 jakob 1491: }
1492:
1.13 deraadt 1493: /*
1494: * Change the comment of a private key file.
1495: */
1.63 itojun 1496: static void
1.325 djm 1497: do_change_comment(struct passwd *pw, const char *identity_comment)
1.1 deraadt 1498: {
1.46 deraadt 1499: char new_comment[1024], *comment, *passphrase;
1.252 djm 1500: struct sshkey *private;
1501: struct sshkey *public;
1.12 markus 1502: struct stat st;
1.409 djm 1503: int r;
1.12 markus 1504:
1505: if (!have_identity)
1506: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1507: if (stat(identity_file, &st) == -1)
1.269 djm 1508: fatal("%s: %s", identity_file, strerror(errno));
1.252 djm 1509: if ((r = sshkey_load_private(identity_file, "",
1510: &private, &comment)) == 0)
1511: passphrase = xstrdup("");
1.269 djm 1512: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 1513: fatal_r(r, "Cannot load private key \"%s\"", identity_file);
1.269 djm 1514: else {
1.12 markus 1515: if (identity_passphrase)
1516: passphrase = xstrdup(identity_passphrase);
1517: else if (identity_new_passphrase)
1518: passphrase = xstrdup(identity_new_passphrase);
1519: else
1.65 markus 1520: passphrase = read_passphrase("Enter passphrase: ",
1521: RP_ALLOW_STDIN);
1.12 markus 1522: /* Try to load using the passphrase. */
1.252 djm 1523: if ((r = sshkey_load_private(identity_file, passphrase,
1524: &private, &comment)) != 0) {
1.399 jsg 1525: freezero(passphrase, strlen(passphrase));
1.421 djm 1526: fatal_r(r, "Cannot load private key \"%s\"",
1527: identity_file);
1.12 markus 1528: }
1529: }
1.283 halex 1530:
1.313 markus 1531: if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
1.336 djm 1532: private_key_format != SSHKEY_PRIVATE_OPENSSH) {
1.302 djm 1533: error("Comments are only supported for keys stored in "
1.283 halex 1534: "the new format (-o).");
1.268 tobias 1535: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1536: sshkey_free(private);
1.52 markus 1537: exit(1);
1.86 deraadt 1538: }
1.293 millert 1539: if (comment)
1.330 lum 1540: printf("Old comment: %s\n", comment);
1.293 millert 1541: else
1.330 lum 1542: printf("No existing comment\n");
1.12 markus 1543:
1544: if (identity_comment) {
1545: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1546: } else {
1.330 lum 1547: printf("New comment: ");
1.12 markus 1548: fflush(stdout);
1549: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1.240 djm 1550: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1551: sshkey_free(private);
1.12 markus 1552: exit(1);
1553: }
1.162 gilles 1554: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1555: }
1.330 lum 1556: if (comment != NULL && strcmp(comment, new_comment) == 0) {
1557: printf("No change to comment\n");
1558: free(passphrase);
1559: sshkey_free(private);
1560: free(comment);
1561: exit(0);
1562: }
1.12 markus 1563:
1564: /* Save the file using the new passphrase. */
1.252 djm 1565: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 1566: new_comment, private_key_format, openssh_format_cipher,
1567: rounds)) != 0) {
1.421 djm 1568: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1569: freezero(passphrase, strlen(passphrase));
1.252 djm 1570: sshkey_free(private);
1.227 djm 1571: free(comment);
1.12 markus 1572: exit(1);
1573: }
1.399 jsg 1574: freezero(passphrase, strlen(passphrase));
1.252 djm 1575: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1576: fatal_fr(r, "sshkey_from_private");
1.252 djm 1577: sshkey_free(private);
1.12 markus 1578:
1579: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 1580: if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)
1581: fatal_r(r, "Unable to save public key to %s", identity_file);
1.252 djm 1582: sshkey_free(public);
1.227 djm 1583: free(comment);
1.1 deraadt 1584:
1.330 lum 1585: if (strlen(new_comment) > 0)
1586: printf("Comment '%s' applied\n", new_comment);
1587: else
1588: printf("Comment removed\n");
1589:
1.12 markus 1590: exit(0);
1.1 deraadt 1591: }
1592:
1.179 djm 1593: static void
1.415 djm 1594: cert_ext_add(const char *key, const char *value, int iscrit)
1.179 djm 1595: {
1.415 djm 1596: cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));
1597: cert_ext[ncert_ext].key = xstrdup(key);
1598: cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);
1599: cert_ext[ncert_ext].crit = iscrit;
1600: ncert_ext++;
1.179 djm 1601: }
1602:
1.415 djm 1603: /* qsort(3) comparison function for certificate extensions */
1604: static int
1605: cert_ext_cmp(const void *_a, const void *_b)
1.179 djm 1606: {
1.415 djm 1607: const struct cert_ext *a = (const struct cert_ext *)_a;
1608: const struct cert_ext *b = (const struct cert_ext *)_b;
1.252 djm 1609: int r;
1.179 djm 1610:
1.415 djm 1611: if (a->crit != b->crit)
1612: return (a->crit < b->crit) ? -1 : 1;
1613: if ((r = strcmp(a->key, b->key)) != 0)
1614: return r;
1615: if ((a->val == NULL) != (b->val == NULL))
1616: return (a->val == NULL) ? -1 : 1;
1617: if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)
1618: return r;
1619: return 0;
1.179 djm 1620: }
1621:
1.190 djm 1622: #define OPTIONS_CRITICAL 1
1623: #define OPTIONS_EXTENSIONS 2
1.179 djm 1624: static void
1.252 djm 1625: prepare_options_buf(struct sshbuf *c, int which)
1.179 djm 1626: {
1.415 djm 1627: struct sshbuf *b;
1.300 djm 1628: size_t i;
1.415 djm 1629: int r;
1630: const struct cert_ext *ext;
1.300 djm 1631:
1.415 djm 1632: if ((b = sshbuf_new()) == NULL)
1.421 djm 1633: fatal_f("sshbuf_new failed");
1.252 djm 1634: sshbuf_reset(c);
1.415 djm 1635: for (i = 0; i < ncert_ext; i++) {
1636: ext = &cert_ext[i];
1637: if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||
1638: (!ext->crit && (which & OPTIONS_CRITICAL)))
1.300 djm 1639: continue;
1.415 djm 1640: if (ext->val == NULL) {
1641: /* flag option */
1.421 djm 1642: debug3_f("%s", ext->key);
1.415 djm 1643: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1644: (r = sshbuf_put_string(c, NULL, 0)) != 0)
1.421 djm 1645: fatal_fr(r, "prepare flag");
1.415 djm 1646: } else {
1647: /* key/value option */
1.421 djm 1648: debug3_f("%s=%s", ext->key, ext->val);
1.415 djm 1649: sshbuf_reset(b);
1650: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1651: (r = sshbuf_put_cstring(b, ext->val)) != 0 ||
1652: (r = sshbuf_put_stringb(c, b)) != 0)
1.421 djm 1653: fatal_fr(r, "prepare k/v");
1.300 djm 1654: }
1655: }
1.415 djm 1656: sshbuf_free(b);
1657: }
1658:
1659: static void
1660: finalise_cert_exts(void)
1661: {
1662: /* critical options */
1663: if (certflags_command != NULL)
1664: cert_ext_add("force-command", certflags_command, 1);
1665: if (certflags_src_addr != NULL)
1666: cert_ext_add("source-address", certflags_src_addr, 1);
1.453 naddy 1667: if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0)
1668: cert_ext_add("verify-required", NULL, 1);
1.415 djm 1669: /* extensions */
1670: if ((certflags_flags & CERTOPT_X_FWD) != 0)
1671: cert_ext_add("permit-X11-forwarding", NULL, 0);
1672: if ((certflags_flags & CERTOPT_AGENT_FWD) != 0)
1673: cert_ext_add("permit-agent-forwarding", NULL, 0);
1674: if ((certflags_flags & CERTOPT_PORT_FWD) != 0)
1675: cert_ext_add("permit-port-forwarding", NULL, 0);
1676: if ((certflags_flags & CERTOPT_PTY) != 0)
1677: cert_ext_add("permit-pty", NULL, 0);
1678: if ((certflags_flags & CERTOPT_USER_RC) != 0)
1679: cert_ext_add("permit-user-rc", NULL, 0);
1680: if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
1681: cert_ext_add("no-touch-required", NULL, 0);
1682: /* order lexically by key */
1683: if (ncert_ext > 0)
1684: qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp);
1.179 djm 1685: }
1686:
1.252 djm 1687: static struct sshkey *
1.197 djm 1688: load_pkcs11_key(char *path)
1689: {
1690: #ifdef ENABLE_PKCS11
1.252 djm 1691: struct sshkey **keys = NULL, *public, *private = NULL;
1692: int r, i, nkeys;
1.197 djm 1693:
1.252 djm 1694: if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1.421 djm 1695: fatal_r(r, "Couldn't load CA public key \"%s\"", path);
1.197 djm 1696:
1.392 djm 1697: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,
1698: &keys, NULL);
1.421 djm 1699: debug3_f("%d keys", nkeys);
1.197 djm 1700: if (nkeys <= 0)
1701: fatal("cannot read public key from pkcs11");
1702: for (i = 0; i < nkeys; i++) {
1.252 djm 1703: if (sshkey_equal_public(public, keys[i])) {
1.197 djm 1704: private = keys[i];
1705: continue;
1706: }
1.252 djm 1707: sshkey_free(keys[i]);
1.197 djm 1708: }
1.227 djm 1709: free(keys);
1.252 djm 1710: sshkey_free(public);
1.197 djm 1711: return private;
1712: #else
1713: fatal("no pkcs11 support");
1714: #endif /* ENABLE_PKCS11 */
1715: }
1716:
1.305 djm 1717: /* Signer for sshkey_certify_custom that uses the agent */
1718: static int
1.332 djm 1719: agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
1.305 djm 1720: const u_char *data, size_t datalen,
1.416 djm 1721: const char *alg, const char *provider, const char *pin,
1722: u_int compat, void *ctx)
1.305 djm 1723: {
1724: int *agent_fdp = (int *)ctx;
1725:
1726: return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
1727: data, datalen, alg, compat);
1728: }
1729:
1.179 djm 1730: static void
1.325 djm 1731: do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
1.326 djm 1732: unsigned long long cert_serial, int cert_serial_autoinc,
1733: int argc, char **argv)
1.179 djm 1734: {
1.409 djm 1735: int r, i, found, agent_fd = -1;
1.179 djm 1736: u_int n;
1.252 djm 1737: struct sshkey *ca, *public;
1.374 djm 1738: char valid[64], *otmp, *tmp, *cp, *out, *comment;
1.416 djm 1739: char *ca_fp = NULL, **plist = NULL, *pin = NULL;
1.305 djm 1740: struct ssh_identitylist *agent_ids;
1741: size_t j;
1.374 djm 1742: struct notifier_ctx *notifier = NULL;
1.186 djm 1743:
1.246 markus 1744: #ifdef ENABLE_PKCS11
1.197 djm 1745: pkcs11_init(1);
1.246 markus 1746: #endif
1.197 djm 1747: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1748: if (pkcs11provider != NULL) {
1.305 djm 1749: /* If a PKCS#11 token was specified then try to use it */
1.197 djm 1750: if ((ca = load_pkcs11_key(tmp)) == NULL)
1751: fatal("No PKCS#11 key matching %s found", ca_key_path);
1.305 djm 1752: } else if (prefer_agent) {
1753: /*
1754: * Agent signature requested. Try to use agent after making
1755: * sure the public key specified is actually present in the
1756: * agent.
1757: */
1758: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 1759: fatal_r(r, "Cannot load CA public key %s", tmp);
1.305 djm 1760: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
1.421 djm 1761: fatal_r(r, "Cannot use public key for CA signature");
1.305 djm 1762: if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
1.421 djm 1763: fatal_r(r, "Retrieve agent key list");
1.305 djm 1764: found = 0;
1765: for (j = 0; j < agent_ids->nkeys; j++) {
1766: if (sshkey_equal(ca, agent_ids->keys[j])) {
1767: found = 1;
1768: break;
1769: }
1770: }
1771: if (!found)
1772: fatal("CA key %s not found in agent", tmp);
1773: ssh_free_identitylist(agent_ids);
1774: ca->flags |= SSHKEY_FLAG_EXT;
1775: } else {
1776: /* CA key is assumed to be a private key on the filesystem */
1.341 djm 1777: ca = load_identity(tmp, NULL);
1.416 djm 1778: if (sshkey_is_sk(ca) &&
1779: (ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
1780: if ((pin = read_passphrase("Enter PIN for CA key: ",
1781: RP_ALLOW_STDIN)) == NULL)
1.421 djm 1782: fatal_f("couldn't read PIN");
1.416 djm 1783: }
1.305 djm 1784: }
1.227 djm 1785: free(tmp);
1.197 djm 1786:
1.390 djm 1787: if (key_type_name != NULL) {
1788: if (sshkey_type_from_name(key_type_name) != ca->type) {
1789: fatal("CA key type %s doesn't match specified %s",
1790: sshkey_ssh_name(ca), key_type_name);
1791: }
1792: } else if (ca->type == KEY_RSA) {
1793: /* Default to a good signature algorithm */
1794: key_type_name = "rsa-sha2-512";
1.290 djm 1795: }
1.374 djm 1796: ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
1.290 djm 1797:
1.415 djm 1798: finalise_cert_exts();
1.179 djm 1799: for (i = 0; i < argc; i++) {
1800: /* Split list of principals */
1801: n = 0;
1802: if (cert_principals != NULL) {
1803: otmp = tmp = xstrdup(cert_principals);
1804: plist = NULL;
1805: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1.270 deraadt 1806: plist = xreallocarray(plist, n + 1, sizeof(*plist));
1.179 djm 1807: if (*(plist[n] = xstrdup(cp)) == '\0')
1808: fatal("Empty principal name");
1809: }
1.227 djm 1810: free(otmp);
1.179 djm 1811: }
1.312 djm 1812: if (n > SSHKEY_CERT_MAX_PRINCIPALS)
1813: fatal("Too many certificate principals specified");
1.337 djm 1814:
1.179 djm 1815: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1.252 djm 1816: if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1.421 djm 1817: fatal_r(r, "load pubkey \"%s\"", tmp);
1.366 djm 1818: if (sshkey_is_cert(public))
1.421 djm 1819: fatal_f("key \"%s\" type %s cannot be certified",
1820: tmp, sshkey_type(public));
1.179 djm 1821:
1822: /* Prepare certificate to sign */
1.275 djm 1823: if ((r = sshkey_to_certified(public)) != 0)
1.421 djm 1824: fatal_r(r, "Could not upgrade key %s to certificate", tmp);
1.179 djm 1825: public->cert->type = cert_key_type;
1.186 djm 1826: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1827: public->cert->key_id = xstrdup(cert_key_id);
1828: public->cert->nprincipals = n;
1829: public->cert->principals = plist;
1830: public->cert->valid_after = cert_valid_from;
1831: public->cert->valid_before = cert_valid_to;
1.275 djm 1832: prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1833: prepare_options_buf(public->cert->extensions,
1834: OPTIONS_EXTENSIONS);
1.252 djm 1835: if ((r = sshkey_from_private(ca,
1836: &public->cert->signature_key)) != 0)
1.421 djm 1837: fatal_r(r, "sshkey_from_private (ca key)");
1.179 djm 1838:
1.305 djm 1839: if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
1840: if ((r = sshkey_certify_custom(public, ca,
1.416 djm 1841: key_type_name, sk_provider, NULL, agent_signer,
1.358 djm 1842: &agent_fd)) != 0)
1.421 djm 1843: fatal_r(r, "Couldn't certify %s via agent", tmp);
1.305 djm 1844: } else {
1.374 djm 1845: if (sshkey_is_sk(ca) &&
1846: (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
1847: notifier = notify_start(0,
1848: "Confirm user presence for key %s %s",
1849: sshkey_type(ca), ca_fp);
1850: }
1851: r = sshkey_certify(public, ca, key_type_name,
1.416 djm 1852: sk_provider, pin);
1.424 djm 1853: notify_complete(notifier, "User presence confirmed");
1.374 djm 1854: if (r != 0)
1.421 djm 1855: fatal_r(r, "Couldn't certify key %s", tmp);
1.305 djm 1856: }
1.179 djm 1857:
1858: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1859: *cp = '\0';
1860: xasprintf(&out, "%s-cert.pub", tmp);
1.227 djm 1861: free(tmp);
1.179 djm 1862:
1.409 djm 1863: if ((r = sshkey_save_public(public, out, comment)) != 0) {
1.421 djm 1864: fatal_r(r, "Unable to save public key to %s",
1865: identity_file);
1.409 djm 1866: }
1.179 djm 1867:
1.186 djm 1868: if (!quiet) {
1.282 djm 1869: sshkey_format_cert_validity(public->cert,
1.281 djm 1870: valid, sizeof(valid));
1.186 djm 1871: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1.282 djm 1872: "valid %s", sshkey_cert_type(public),
1.205 djm 1873: out, public->cert->key_id,
1874: (unsigned long long)public->cert->serial,
1.179 djm 1875: cert_principals != NULL ? " for " : "",
1876: cert_principals != NULL ? cert_principals : "",
1.281 djm 1877: valid);
1.186 djm 1878: }
1.179 djm 1879:
1.252 djm 1880: sshkey_free(public);
1.227 djm 1881: free(out);
1.326 djm 1882: if (cert_serial_autoinc)
1883: cert_serial++;
1.179 djm 1884: }
1.416 djm 1885: if (pin != NULL)
1886: freezero(pin, strlen(pin));
1.374 djm 1887: free(ca_fp);
1.246 markus 1888: #ifdef ENABLE_PKCS11
1.197 djm 1889: pkcs11_terminate();
1.246 markus 1890: #endif
1.179 djm 1891: exit(0);
1892: }
1893:
1894: static u_int64_t
1895: parse_relative_time(const char *s, time_t now)
1896: {
1897: int64_t mul, secs;
1898:
1899: mul = *s == '-' ? -1 : 1;
1900:
1901: if ((secs = convtime(s + 1)) == -1)
1902: fatal("Invalid relative certificate time %s", s);
1903: if (mul == -1 && secs > now)
1904: fatal("Certificate time %s cannot be represented", s);
1905: return now + (u_int64_t)(secs * mul);
1906: }
1907:
1908: static void
1.459 djm 1909: parse_hex_u64(const char *s, uint64_t *up)
1910: {
1911: char *ep;
1912: unsigned long long ull;
1913:
1914: errno = 0;
1915: ull = strtoull(s, &ep, 16);
1916: if (*s == '\0' || *ep != '\0')
1917: fatal("Invalid certificate time: not a number");
1918: if (errno == ERANGE && ull == ULONG_MAX)
1919: fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time");
1920: *up = (uint64_t)ull;
1921: }
1922:
1923: static void
1.179 djm 1924: parse_cert_times(char *timespec)
1925: {
1926: char *from, *to;
1927: time_t now = time(NULL);
1928: int64_t secs;
1929:
1930: /* +timespec relative to now */
1931: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1932: if ((secs = convtime(timespec + 1)) == -1)
1933: fatal("Invalid relative certificate life %s", timespec);
1934: cert_valid_to = now + secs;
1935: /*
1936: * Backdate certificate one minute to avoid problems on hosts
1937: * with poorly-synchronised clocks.
1938: */
1939: cert_valid_from = ((now - 59)/ 60) * 60;
1940: return;
1941: }
1942:
1943: /*
1944: * from:to, where
1.459 djm 1945: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always"
1946: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever"
1.179 djm 1947: */
1948: from = xstrdup(timespec);
1949: to = strchr(from, ':');
1950: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1951: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1952: *to++ = '\0';
1953:
1954: if (*from == '-' || *from == '+')
1955: cert_valid_from = parse_relative_time(from, now);
1.308 djm 1956: else if (strcmp(from, "always") == 0)
1957: cert_valid_from = 0;
1.459 djm 1958: else if (strncmp(from, "0x", 2) == 0)
1959: parse_hex_u64(from, &cert_valid_from);
1.314 djm 1960: else if (parse_absolute_time(from, &cert_valid_from) != 0)
1961: fatal("Invalid from time \"%s\"", from);
1.179 djm 1962:
1963: if (*to == '-' || *to == '+')
1.235 djm 1964: cert_valid_to = parse_relative_time(to, now);
1.308 djm 1965: else if (strcmp(to, "forever") == 0)
1966: cert_valid_to = ~(u_int64_t)0;
1.460 djm 1967: else if (strncmp(to, "0x", 2) == 0)
1.459 djm 1968: parse_hex_u64(to, &cert_valid_to);
1.314 djm 1969: else if (parse_absolute_time(to, &cert_valid_to) != 0)
1970: fatal("Invalid to time \"%s\"", to);
1.179 djm 1971:
1972: if (cert_valid_to <= cert_valid_from)
1973: fatal("Empty certificate validity interval");
1.227 djm 1974: free(from);
1.179 djm 1975: }
1976:
1977: static void
1.186 djm 1978: add_cert_option(char *opt)
1.179 djm 1979: {
1.300 djm 1980: char *val, *cp;
1981: int iscrit = 0;
1.179 djm 1982:
1.208 stevesk 1983: if (strcasecmp(opt, "clear") == 0)
1.190 djm 1984: certflags_flags = 0;
1.179 djm 1985: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1986: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1987: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1988: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1989: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1990: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1991: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1992: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1993: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1994: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1995: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1996: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1997: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1998: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1999: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 2000: certflags_flags |= CERTOPT_PTY;
1.179 djm 2001: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 2002: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 2003: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 2004: certflags_flags |= CERTOPT_USER_RC;
1.371 djm 2005: else if (strcasecmp(opt, "touch-required") == 0)
2006: certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
2007: else if (strcasecmp(opt, "no-touch-required") == 0)
2008: certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
1.453 naddy 2009: else if (strcasecmp(opt, "no-verify-required") == 0)
2010: certflags_flags &= ~CERTOPT_REQUIRE_VERIFY;
2011: else if (strcasecmp(opt, "verify-required") == 0)
2012: certflags_flags |= CERTOPT_REQUIRE_VERIFY;
1.179 djm 2013: else if (strncasecmp(opt, "force-command=", 14) == 0) {
2014: val = opt + 14;
2015: if (*val == '\0')
1.186 djm 2016: fatal("Empty force-command option");
1.190 djm 2017: if (certflags_command != NULL)
1.179 djm 2018: fatal("force-command already specified");
1.190 djm 2019: certflags_command = xstrdup(val);
1.179 djm 2020: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
2021: val = opt + 15;
2022: if (*val == '\0')
1.186 djm 2023: fatal("Empty source-address option");
1.190 djm 2024: if (certflags_src_addr != NULL)
1.179 djm 2025: fatal("source-address already specified");
2026: if (addr_match_cidr_list(NULL, val) != 0)
2027: fatal("Invalid source-address list");
1.190 djm 2028: certflags_src_addr = xstrdup(val);
1.300 djm 2029: } else if (strncasecmp(opt, "extension:", 10) == 0 ||
1.429 djm 2030: (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
1.300 djm 2031: val = xstrdup(strchr(opt, ':') + 1);
2032: if ((cp = strchr(val, '=')) != NULL)
2033: *cp++ = '\0';
1.415 djm 2034: cert_ext_add(val, cp, iscrit);
2035: free(val);
1.179 djm 2036: } else
1.186 djm 2037: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 2038: }
2039:
1.63 itojun 2040: static void
1.275 djm 2041: show_options(struct sshbuf *optbuf, int in_critical)
1.192 djm 2042: {
1.415 djm 2043: char *name, *arg, *hex;
1.252 djm 2044: struct sshbuf *options, *option = NULL;
2045: int r;
2046:
2047: if ((options = sshbuf_fromb(optbuf)) == NULL)
1.421 djm 2048: fatal_f("sshbuf_fromb failed");
1.252 djm 2049: while (sshbuf_len(options) != 0) {
2050: sshbuf_free(option);
2051: option = NULL;
2052: if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
2053: (r = sshbuf_froms(options, &option)) != 0)
1.421 djm 2054: fatal_fr(r, "parse option");
1.192 djm 2055: printf(" %s", name);
1.275 djm 2056: if (!in_critical &&
1.192 djm 2057: (strcmp(name, "permit-X11-forwarding") == 0 ||
2058: strcmp(name, "permit-agent-forwarding") == 0 ||
2059: strcmp(name, "permit-port-forwarding") == 0 ||
2060: strcmp(name, "permit-pty") == 0 ||
1.371 djm 2061: strcmp(name, "permit-user-rc") == 0 ||
2062: strcmp(name, "no-touch-required") == 0)) {
1.192 djm 2063: printf("\n");
1.371 djm 2064: } else if (in_critical &&
1.192 djm 2065: (strcmp(name, "force-command") == 0 ||
2066: strcmp(name, "source-address") == 0)) {
1.252 djm 2067: if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1.421 djm 2068: fatal_fr(r, "parse critical");
1.245 djm 2069: printf(" %s\n", arg);
2070: free(arg);
1.453 naddy 2071: } else if (in_critical &&
2072: strcmp(name, "verify-required") == 0) {
2073: printf("\n");
1.415 djm 2074: } else if (sshbuf_len(option) > 0) {
2075: hex = sshbuf_dtob16(option);
2076: printf(" UNKNOWN OPTION: %s (len %zu)\n",
2077: hex, sshbuf_len(option));
1.252 djm 2078: sshbuf_reset(option);
1.415 djm 2079: free(hex);
2080: } else
2081: printf(" UNKNOWN FLAG OPTION\n");
1.227 djm 2082: free(name);
1.252 djm 2083: if (sshbuf_len(option) != 0)
1.192 djm 2084: fatal("Option corrupt: extra data at end");
2085: }
1.252 djm 2086: sshbuf_free(option);
2087: sshbuf_free(options);
1.192 djm 2088: }
2089:
2090: static void
1.278 djm 2091: print_cert(struct sshkey *key)
1.182 djm 2092: {
1.281 djm 2093: char valid[64], *key_fp, *ca_fp;
1.275 djm 2094: u_int i;
1.186 djm 2095:
1.252 djm 2096: key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
2097: ca_fp = sshkey_fingerprint(key->cert->signature_key,
1.251 djm 2098: fingerprint_hash, SSH_FP_DEFAULT);
1.259 djm 2099: if (key_fp == NULL || ca_fp == NULL)
1.421 djm 2100: fatal_f("sshkey_fingerprint fail");
1.281 djm 2101: sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1.182 djm 2102:
1.252 djm 2103: printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
2104: sshkey_cert_type(key));
2105: printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1.323 djm 2106: printf(" Signing CA: %s %s (using %s)\n",
2107: sshkey_type(key->cert->signature_key), ca_fp,
2108: key->cert->signature_type);
1.186 djm 2109: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1.275 djm 2110: printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1.281 djm 2111: printf(" Valid: %s\n", valid);
1.182 djm 2112: printf(" Principals: ");
2113: if (key->cert->nprincipals == 0)
2114: printf("(none)\n");
2115: else {
2116: for (i = 0; i < key->cert->nprincipals; i++)
2117: printf("\n %s",
2118: key->cert->principals[i]);
2119: printf("\n");
2120: }
1.186 djm 2121: printf(" Critical Options: ");
1.252 djm 2122: if (sshbuf_len(key->cert->critical) == 0)
1.182 djm 2123: printf("(none)\n");
2124: else {
2125: printf("\n");
1.275 djm 2126: show_options(key->cert->critical, 1);
1.186 djm 2127: }
1.275 djm 2128: printf(" Extensions: ");
2129: if (sshbuf_len(key->cert->extensions) == 0)
2130: printf("(none)\n");
2131: else {
2132: printf("\n");
2133: show_options(key->cert->extensions, 0);
1.182 djm 2134: }
1.278 djm 2135: }
2136:
2137: static void
2138: do_show_cert(struct passwd *pw)
2139: {
2140: struct sshkey *key = NULL;
2141: struct stat st;
2142: int r, is_stdin = 0, ok = 0;
2143: FILE *f;
1.317 markus 2144: char *cp, *line = NULL;
1.278 djm 2145: const char *path;
1.317 markus 2146: size_t linesize = 0;
1.289 djm 2147: u_long lnum = 0;
1.278 djm 2148:
2149: if (!have_identity)
2150: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 2151: if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
1.278 djm 2152: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
2153:
2154: path = identity_file;
2155: if (strcmp(path, "-") == 0) {
2156: f = stdin;
2157: path = "(stdin)";
2158: is_stdin = 1;
2159: } else if ((f = fopen(identity_file, "r")) == NULL)
2160: fatal("fopen %s: %s", identity_file, strerror(errno));
2161:
1.317 markus 2162: while (getline(&line, &linesize, f) != -1) {
2163: lnum++;
1.278 djm 2164: sshkey_free(key);
2165: key = NULL;
2166: /* Trim leading space and comments */
2167: cp = line + strspn(line, " \t");
2168: if (*cp == '#' || *cp == '\0')
2169: continue;
2170: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2171: fatal("sshkey_new");
1.278 djm 2172: if ((r = sshkey_read(key, &cp)) != 0) {
1.421 djm 2173: error_r(r, "%s:%lu: invalid key", path, lnum);
1.278 djm 2174: continue;
2175: }
2176: if (!sshkey_is_cert(key)) {
2177: error("%s:%lu is not a certificate", path, lnum);
2178: continue;
2179: }
2180: ok = 1;
2181: if (!is_stdin && lnum == 1)
2182: printf("%s:\n", path);
2183: else
2184: printf("%s:%lu:\n", path, lnum);
2185: print_cert(key);
2186: }
1.317 markus 2187: free(line);
1.278 djm 2188: sshkey_free(key);
2189: fclose(f);
2190: exit(ok ? 0 : 1);
1.182 djm 2191: }
2192:
2193: static void
1.223 djm 2194: load_krl(const char *path, struct ssh_krl **krlp)
2195: {
1.252 djm 2196: struct sshbuf *krlbuf;
1.393 djm 2197: int r;
1.223 djm 2198:
1.393 djm 2199: if ((r = sshbuf_load_file(path, &krlbuf)) != 0)
1.421 djm 2200: fatal_r(r, "Unable to load KRL %s", path);
1.223 djm 2201: /* XXX check sigs */
1.252 djm 2202: if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1.223 djm 2203: *krlp == NULL)
1.421 djm 2204: fatal_r(r, "Invalid KRL file %s", path);
1.252 djm 2205: sshbuf_free(krlbuf);
1.223 djm 2206: }
2207:
2208: static void
1.320 djm 2209: hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
2210: const char *file, u_long lnum)
2211: {
2212: char *tmp;
2213: size_t tlen;
2214: struct sshbuf *b;
2215: int r;
2216:
2217: if (strncmp(cp, "SHA256:", 7) != 0)
2218: fatal("%s:%lu: unsupported hash algorithm", file, lnum);
2219: cp += 7;
2220:
2221: /*
2222: * OpenSSH base64 hashes omit trailing '='
2223: * characters; put them back for decode.
2224: */
2225: tlen = strlen(cp);
2226: tmp = xmalloc(tlen + 4 + 1);
2227: strlcpy(tmp, cp, tlen + 1);
2228: while ((tlen % 4) != 0) {
2229: tmp[tlen++] = '=';
2230: tmp[tlen] = '\0';
2231: }
2232: if ((b = sshbuf_new()) == NULL)
1.421 djm 2233: fatal_f("sshbuf_new failed");
1.320 djm 2234: if ((r = sshbuf_b64tod(b, tmp)) != 0)
1.421 djm 2235: fatal_r(r, "%s:%lu: decode hash failed", file, lnum);
1.320 djm 2236: free(tmp);
2237: *lenp = sshbuf_len(b);
2238: *blobp = xmalloc(*lenp);
2239: memcpy(*blobp, sshbuf_ptr(b), *lenp);
2240: sshbuf_free(b);
2241: }
2242:
2243: static void
1.261 djm 2244: update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1.252 djm 2245: const struct sshkey *ca, struct ssh_krl *krl)
1.223 djm 2246: {
1.252 djm 2247: struct sshkey *key = NULL;
1.223 djm 2248: u_long lnum = 0;
1.317 markus 2249: char *path, *cp, *ep, *line = NULL;
1.320 djm 2250: u_char *blob = NULL;
2251: size_t blen = 0, linesize = 0;
1.223 djm 2252: unsigned long long serial, serial2;
1.320 djm 2253: int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
1.223 djm 2254: FILE *krl_spec;
2255:
2256: path = tilde_expand_filename(file, pw->pw_uid);
2257: if (strcmp(path, "-") == 0) {
2258: krl_spec = stdin;
2259: free(path);
2260: path = xstrdup("(standard input)");
2261: } else if ((krl_spec = fopen(path, "r")) == NULL)
2262: fatal("fopen %s: %s", path, strerror(errno));
2263:
2264: if (!quiet)
2265: printf("Revoking from %s\n", path);
1.317 markus 2266: while (getline(&line, &linesize, krl_spec) != -1) {
2267: lnum++;
1.320 djm 2268: was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
1.223 djm 2269: cp = line + strspn(line, " \t");
2270: /* Trim trailing space, comments and strip \n */
2271: for (i = 0, r = -1; cp[i] != '\0'; i++) {
2272: if (cp[i] == '#' || cp[i] == '\n') {
2273: cp[i] = '\0';
2274: break;
2275: }
2276: if (cp[i] == ' ' || cp[i] == '\t') {
2277: /* Remember the start of a span of whitespace */
2278: if (r == -1)
2279: r = i;
2280: } else
2281: r = -1;
2282: }
2283: if (r != -1)
2284: cp[r] = '\0';
2285: if (*cp == '\0')
2286: continue;
2287: if (strncasecmp(cp, "serial:", 7) == 0) {
1.261 djm 2288: if (ca == NULL && !wild_ca) {
1.231 djm 2289: fatal("revoking certificates by serial number "
1.223 djm 2290: "requires specification of a CA key");
2291: }
2292: cp += 7;
2293: cp = cp + strspn(cp, " \t");
2294: errno = 0;
2295: serial = strtoull(cp, &ep, 0);
2296: if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2297: fatal("%s:%lu: invalid serial \"%s\"",
2298: path, lnum, cp);
2299: if (errno == ERANGE && serial == ULLONG_MAX)
2300: fatal("%s:%lu: serial out of range",
2301: path, lnum);
2302: serial2 = serial;
2303: if (*ep == '-') {
2304: cp = ep + 1;
2305: errno = 0;
2306: serial2 = strtoull(cp, &ep, 0);
2307: if (*cp == '\0' || *ep != '\0')
2308: fatal("%s:%lu: invalid serial \"%s\"",
2309: path, lnum, cp);
2310: if (errno == ERANGE && serial2 == ULLONG_MAX)
2311: fatal("%s:%lu: serial out of range",
2312: path, lnum);
2313: if (serial2 <= serial)
2314: fatal("%s:%lu: invalid serial range "
2315: "%llu:%llu", path, lnum,
2316: (unsigned long long)serial,
2317: (unsigned long long)serial2);
2318: }
2319: if (ssh_krl_revoke_cert_by_serial_range(krl,
2320: ca, serial, serial2) != 0) {
1.421 djm 2321: fatal_f("revoke serial failed");
1.223 djm 2322: }
2323: } else if (strncasecmp(cp, "id:", 3) == 0) {
1.261 djm 2324: if (ca == NULL && !wild_ca) {
1.232 djm 2325: fatal("revoking certificates by key ID "
1.223 djm 2326: "requires specification of a CA key");
2327: }
2328: cp += 3;
2329: cp = cp + strspn(cp, " \t");
2330: if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
1.421 djm 2331: fatal_f("revoke key ID failed");
1.320 djm 2332: } else if (strncasecmp(cp, "hash:", 5) == 0) {
2333: cp += 5;
2334: cp = cp + strspn(cp, " \t");
2335: hash_to_blob(cp, &blob, &blen, file, lnum);
2336: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
1.401 markus 2337: if (r != 0)
1.421 djm 2338: fatal_fr(r, "revoke key failed");
1.223 djm 2339: } else {
2340: if (strncasecmp(cp, "key:", 4) == 0) {
2341: cp += 4;
2342: cp = cp + strspn(cp, " \t");
2343: was_explicit_key = 1;
2344: } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2345: cp += 5;
2346: cp = cp + strspn(cp, " \t");
2347: was_sha1 = 1;
1.320 djm 2348: } else if (strncasecmp(cp, "sha256:", 7) == 0) {
2349: cp += 7;
2350: cp = cp + strspn(cp, " \t");
2351: was_sha256 = 1;
1.223 djm 2352: /*
2353: * Just try to process the line as a key.
2354: * Parsing will fail if it isn't.
2355: */
2356: }
1.252 djm 2357: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2358: fatal("sshkey_new");
1.252 djm 2359: if ((r = sshkey_read(key, &cp)) != 0)
1.421 djm 2360: fatal_r(r, "%s:%lu: invalid key", path, lnum);
1.223 djm 2361: if (was_explicit_key)
2362: r = ssh_krl_revoke_key_explicit(krl, key);
1.320 djm 2363: else if (was_sha1) {
2364: if (sshkey_fingerprint_raw(key,
2365: SSH_DIGEST_SHA1, &blob, &blen) != 0) {
2366: fatal("%s:%lu: fingerprint failed",
2367: file, lnum);
2368: }
2369: r = ssh_krl_revoke_key_sha1(krl, blob, blen);
2370: } else if (was_sha256) {
2371: if (sshkey_fingerprint_raw(key,
2372: SSH_DIGEST_SHA256, &blob, &blen) != 0) {
2373: fatal("%s:%lu: fingerprint failed",
2374: file, lnum);
2375: }
2376: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
2377: } else
1.223 djm 2378: r = ssh_krl_revoke_key(krl, key);
2379: if (r != 0)
1.421 djm 2380: fatal_fr(r, "revoke key failed");
1.320 djm 2381: freezero(blob, blen);
2382: blob = NULL;
2383: blen = 0;
1.252 djm 2384: sshkey_free(key);
1.223 djm 2385: }
2386: }
2387: if (strcmp(path, "-") != 0)
2388: fclose(krl_spec);
1.317 markus 2389: free(line);
1.226 djm 2390: free(path);
1.223 djm 2391: }
2392:
2393: static void
1.325 djm 2394: do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
2395: unsigned long long krl_version, const char *krl_comment,
2396: int argc, char **argv)
1.223 djm 2397: {
2398: struct ssh_krl *krl;
2399: struct stat sb;
1.252 djm 2400: struct sshkey *ca = NULL;
1.393 djm 2401: int i, r, wild_ca = 0;
1.223 djm 2402: char *tmp;
1.252 djm 2403: struct sshbuf *kbuf;
1.223 djm 2404:
2405: if (*identity_file == '\0')
2406: fatal("KRL generation requires an output file");
2407: if (stat(identity_file, &sb) == -1) {
2408: if (errno != ENOENT)
2409: fatal("Cannot access KRL \"%s\": %s",
2410: identity_file, strerror(errno));
2411: if (updating)
2412: fatal("KRL \"%s\" does not exist", identity_file);
2413: }
2414: if (ca_key_path != NULL) {
1.261 djm 2415: if (strcasecmp(ca_key_path, "none") == 0)
2416: wild_ca = 1;
2417: else {
2418: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2419: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 2420: fatal_r(r, "Cannot load CA public key %s", tmp);
1.261 djm 2421: free(tmp);
2422: }
1.223 djm 2423: }
2424:
2425: if (updating)
2426: load_krl(identity_file, &krl);
2427: else if ((krl = ssh_krl_init()) == NULL)
2428: fatal("couldn't create KRL");
2429:
1.325 djm 2430: if (krl_version != 0)
2431: ssh_krl_set_version(krl, krl_version);
2432: if (krl_comment != NULL)
2433: ssh_krl_set_comment(krl, krl_comment);
1.223 djm 2434:
2435: for (i = 0; i < argc; i++)
1.261 djm 2436: update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
1.223 djm 2437:
1.252 djm 2438: if ((kbuf = sshbuf_new()) == NULL)
2439: fatal("sshbuf_new failed");
2440: if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
1.223 djm 2441: fatal("Couldn't generate KRL");
1.393 djm 2442: if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)
1.223 djm 2443: fatal("write %s: %s", identity_file, strerror(errno));
1.252 djm 2444: sshbuf_free(kbuf);
1.223 djm 2445: ssh_krl_free(krl);
1.286 mmcc 2446: sshkey_free(ca);
1.223 djm 2447: }
2448:
2449: static void
1.405 djm 2450: do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)
1.223 djm 2451: {
2452: int i, r, ret = 0;
2453: char *comment;
2454: struct ssh_krl *krl;
1.252 djm 2455: struct sshkey *k;
1.223 djm 2456:
2457: if (*identity_file == '\0')
2458: fatal("KRL checking requires an input file");
2459: load_krl(identity_file, &krl);
1.405 djm 2460: if (print_krl)
2461: krl_dump(krl, stdout);
1.223 djm 2462: for (i = 0; i < argc; i++) {
1.252 djm 2463: if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
1.421 djm 2464: fatal_r(r, "Cannot load public key %s", argv[i]);
1.223 djm 2465: r = ssh_krl_check_key(krl, k);
2466: printf("%s%s%s%s: %s\n", argv[i],
2467: *comment ? " (" : "", comment, *comment ? ")" : "",
2468: r == 0 ? "ok" : "REVOKED");
2469: if (r != 0)
2470: ret = 1;
1.252 djm 2471: sshkey_free(k);
1.223 djm 2472: free(comment);
2473: }
2474: ssh_krl_free(krl);
2475: exit(ret);
2476: }
2477:
1.344 djm 2478: static struct sshkey *
2479: load_sign_key(const char *keypath, const struct sshkey *pubkey)
2480: {
2481: size_t i, slen, plen = strlen(keypath);
2482: char *privpath = xstrdup(keypath);
1.448 djm 2483: static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
1.344 djm 2484: struct sshkey *ret = NULL, *privkey = NULL;
1.451 djm 2485: int r, waspub = 0;
2486: struct stat st;
1.344 djm 2487:
2488: /*
1.404 djm 2489: * If passed a public key filename, then try to locate the corresponding
1.344 djm 2490: * private key. This lets us specify certificates on the command-line
2491: * and have ssh-keygen find the appropriate private key.
2492: */
2493: for (i = 0; suffixes[i]; i++) {
2494: slen = strlen(suffixes[i]);
2495: if (plen <= slen ||
2496: strcmp(privpath + plen - slen, suffixes[i]) != 0)
2497: continue;
2498: privpath[plen - slen] = '\0';
1.421 djm 2499: debug_f("%s looks like a public key, using private key "
2500: "path %s instead", keypath, privpath);
1.451 djm 2501: waspub = 1;
1.344 djm 2502: }
1.451 djm 2503: if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
2504: fatal("No private key found for public key \"%s\"", keypath);
2505: if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
2506: (r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
2507: debug_fr(r, "load private key \"%s\"", privpath);
2508: fatal("No private key found for \"%s\"", privpath);
2509: } else if (privkey == NULL)
2510: privkey = load_identity(privpath, NULL);
2511:
1.344 djm 2512: if (!sshkey_equal_public(pubkey, privkey)) {
2513: error("Public key %s doesn't match private %s",
2514: keypath, privpath);
2515: goto done;
2516: }
2517: if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
2518: /*
2519: * Graft the certificate onto the private key to make
2520: * it capable of signing.
2521: */
2522: if ((r = sshkey_to_certified(privkey)) != 0) {
1.421 djm 2523: error_fr(r, "sshkey_to_certified");
1.344 djm 2524: goto done;
2525: }
2526: if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
1.421 djm 2527: error_fr(r, "sshkey_cert_copy");
1.344 djm 2528: goto done;
2529: }
2530: }
2531: /* success */
2532: ret = privkey;
2533: privkey = NULL;
2534: done:
2535: sshkey_free(privkey);
2536: free(privpath);
2537: return ret;
2538: }
2539:
2540: static int
2541: sign_one(struct sshkey *signkey, const char *filename, int fd,
1.445 djm 2542: const char *sig_namespace, const char *hashalg, sshsig_signer *signer,
2543: void *signer_ctx)
1.344 djm 2544: {
2545: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2546: int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
1.363 djm 2547: char *wfile = NULL, *asig = NULL, *fp = NULL;
1.416 djm 2548: char *pin = NULL, *prompt = NULL;
1.344 djm 2549:
2550: if (!quiet) {
2551: if (fd == STDIN_FILENO)
2552: fprintf(stderr, "Signing data on standard input\n");
2553: else
2554: fprintf(stderr, "Signing file %s\n", filename);
1.363 djm 2555: }
1.416 djm 2556: if (signer == NULL && sshkey_is_sk(signkey)) {
2557: if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
2558: xasprintf(&prompt, "Enter PIN for %s key: ",
2559: sshkey_type(signkey));
2560: if ((pin = read_passphrase(prompt,
2561: RP_ALLOW_STDIN)) == NULL)
1.421 djm 2562: fatal_f("couldn't read PIN");
1.416 djm 2563: }
2564: if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
2565: if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
2566: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2567: fatal_f("fingerprint failed");
1.416 djm 2568: fprintf(stderr, "Confirm user presence for key %s %s\n",
2569: sshkey_type(signkey), fp);
2570: free(fp);
2571: }
1.344 djm 2572: }
1.445 djm 2573: if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin,
1.416 djm 2574: fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) {
1.421 djm 2575: error_r(r, "Signing %s failed", filename);
1.344 djm 2576: goto out;
2577: }
2578: if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
1.421 djm 2579: error_fr(r, "sshsig_armor");
1.344 djm 2580: goto out;
2581: }
2582: if ((asig = sshbuf_dup_string(abuf)) == NULL) {
1.421 djm 2583: error_f("buffer error");
1.344 djm 2584: r = SSH_ERR_ALLOC_FAIL;
2585: goto out;
2586: }
2587:
2588: if (fd == STDIN_FILENO) {
2589: fputs(asig, stdout);
2590: fflush(stdout);
2591: } else {
2592: xasprintf(&wfile, "%s.sig", filename);
2593: if (confirm_overwrite(wfile)) {
2594: if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
2595: 0666)) == -1) {
2596: oerrno = errno;
2597: error("Cannot open %s: %s",
2598: wfile, strerror(errno));
2599: errno = oerrno;
2600: r = SSH_ERR_SYSTEM_ERROR;
2601: goto out;
2602: }
2603: if (atomicio(vwrite, wfd, asig,
2604: strlen(asig)) != strlen(asig)) {
2605: oerrno = errno;
2606: error("Cannot write to %s: %s",
2607: wfile, strerror(errno));
2608: errno = oerrno;
2609: r = SSH_ERR_SYSTEM_ERROR;
2610: goto out;
2611: }
2612: if (!quiet) {
2613: fprintf(stderr, "Write signature to %s\n",
2614: wfile);
2615: }
2616: }
2617: }
2618: /* success */
2619: r = 0;
2620: out:
2621: free(wfile);
1.416 djm 2622: free(prompt);
1.344 djm 2623: free(asig);
1.416 djm 2624: if (pin != NULL)
2625: freezero(pin, strlen(pin));
1.344 djm 2626: sshbuf_free(abuf);
2627: sshbuf_free(sigbuf);
2628: if (wfd != -1)
2629: close(wfd);
2630: return r;
2631: }
2632:
2633: static int
1.445 djm 2634: sig_process_opts(char * const *opts, size_t nopts, char **hashalgp,
2635: uint64_t *verify_timep, int *print_pubkey)
1.443 djm 2636: {
2637: size_t i;
2638: time_t now;
2639:
2640: if (verify_timep != NULL)
2641: *verify_timep = 0;
2642: if (print_pubkey != NULL)
2643: *print_pubkey = 0;
1.445 djm 2644: if (hashalgp != NULL)
2645: *hashalgp = NULL;
1.443 djm 2646: for (i = 0; i < nopts; i++) {
1.445 djm 2647: if (hashalgp != NULL &&
2648: strncasecmp(opts[i], "hashalg=", 8) == 0) {
2649: *hashalgp = xstrdup(opts[i] + 8);
2650: } else if (verify_timep &&
1.443 djm 2651: strncasecmp(opts[i], "verify-time=", 12) == 0) {
2652: if (parse_absolute_time(opts[i] + 12,
2653: verify_timep) != 0 || *verify_timep == 0) {
2654: error("Invalid \"verify-time\" option");
2655: return SSH_ERR_INVALID_ARGUMENT;
2656: }
2657: } else if (print_pubkey &&
2658: strcasecmp(opts[i], "print-pubkey") == 0) {
2659: *print_pubkey = 1;
2660: } else {
2661: error("Invalid option \"%s\"", opts[i]);
2662: return SSH_ERR_INVALID_ARGUMENT;
2663: }
2664: }
2665: if (verify_timep && *verify_timep == 0) {
2666: if ((now = time(NULL)) < 0) {
2667: error("Time is before epoch");
2668: return SSH_ERR_INVALID_ARGUMENT;
2669: }
2670: *verify_timep = (uint64_t)now;
2671: }
2672: return 0;
2673: }
2674:
2675:
2676: static int
1.452 djm 2677: sig_sign(const char *keypath, const char *sig_namespace, int require_agent,
2678: int argc, char **argv, char * const *opts, size_t nopts)
1.344 djm 2679: {
2680: int i, fd = -1, r, ret = -1;
2681: int agent_fd = -1;
2682: struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
2683: sshsig_signer *signer = NULL;
1.445 djm 2684: char *hashalg = NULL;
1.344 djm 2685:
2686: /* Check file arguments. */
2687: for (i = 0; i < argc; i++) {
2688: if (strcmp(argv[i], "-") != 0)
2689: continue;
2690: if (i > 0 || argc > 1)
2691: fatal("Cannot sign mix of paths and standard input");
2692: }
2693:
1.445 djm 2694: if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0)
2695: goto done; /* error already logged */
2696:
1.344 djm 2697: if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
1.421 djm 2698: error_r(r, "Couldn't load public key %s", keypath);
1.344 djm 2699: goto done;
2700: }
2701:
1.452 djm 2702: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
2703: if (require_agent)
2704: fatal("Couldn't get agent socket");
1.421 djm 2705: debug_r(r, "Couldn't get agent socket");
1.452 djm 2706: } else {
1.344 djm 2707: if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
2708: signer = agent_signer;
1.452 djm 2709: else {
2710: if (require_agent)
2711: fatal("Couldn't find key in agent");
1.421 djm 2712: debug_r(r, "Couldn't find key in agent");
1.452 djm 2713: }
1.344 djm 2714: }
2715:
2716: if (signer == NULL) {
2717: /* Not using agent - try to load private key */
2718: if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
2719: goto done;
2720: signkey = privkey;
2721: } else {
2722: /* Will use key in agent */
2723: signkey = pubkey;
2724: }
2725:
2726: if (argc == 0) {
2727: if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
1.445 djm 2728: sig_namespace, hashalg, signer, &agent_fd)) != 0)
1.344 djm 2729: goto done;
2730: } else {
2731: for (i = 0; i < argc; i++) {
2732: if (strcmp(argv[i], "-") == 0)
2733: fd = STDIN_FILENO;
2734: else if ((fd = open(argv[i], O_RDONLY)) == -1) {
2735: error("Cannot open %s for signing: %s",
2736: argv[i], strerror(errno));
2737: goto done;
2738: }
2739: if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
1.445 djm 2740: hashalg, signer, &agent_fd)) != 0)
1.344 djm 2741: goto done;
2742: if (fd != STDIN_FILENO)
2743: close(fd);
2744: fd = -1;
2745: }
2746: }
2747:
2748: ret = 0;
2749: done:
2750: if (fd != -1 && fd != STDIN_FILENO)
2751: close(fd);
2752: sshkey_free(pubkey);
2753: sshkey_free(privkey);
1.445 djm 2754: free(hashalg);
1.344 djm 2755: return ret;
1.432 djm 2756: }
2757:
2758: static int
1.386 djm 2759: sig_verify(const char *signature, const char *sig_namespace,
1.432 djm 2760: const char *principal, const char *allowed_keys, const char *revoked_keys,
2761: char * const *opts, size_t nopts)
1.344 djm 2762: {
1.393 djm 2763: int r, ret = -1;
1.435 djm 2764: int print_pubkey = 0;
1.344 djm 2765: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2766: struct sshkey *sign_key = NULL;
2767: char *fp = NULL;
1.370 djm 2768: struct sshkey_sig_details *sig_details = NULL;
1.432 djm 2769: uint64_t verify_time = 0;
2770:
1.445 djm 2771: if (sig_process_opts(opts, nopts, NULL, &verify_time,
2772: &print_pubkey) != 0)
1.432 djm 2773: goto done; /* error already logged */
1.344 djm 2774:
1.370 djm 2775: memset(&sig_details, 0, sizeof(sig_details));
1.393 djm 2776: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2777: error_r(r, "Couldn't read signature file");
1.344 djm 2778: goto done;
2779: }
2780:
2781: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2782: error_fr(r, "sshsig_armor");
1.386 djm 2783: goto done;
1.344 djm 2784: }
2785: if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
1.370 djm 2786: &sign_key, &sig_details)) != 0)
1.344 djm 2787: goto done; /* sshsig_verify() prints error */
2788:
2789: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2790: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2791: fatal_f("sshkey_fingerprint failed");
1.344 djm 2792: debug("Valid (unverified) signature from key %s", fp);
1.370 djm 2793: if (sig_details != NULL) {
1.421 djm 2794: debug2_f("signature details: counter = %u, flags = 0x%02x",
2795: sig_details->sk_counter, sig_details->sk_flags);
1.370 djm 2796: }
1.344 djm 2797: free(fp);
2798: fp = NULL;
2799:
2800: if (revoked_keys != NULL) {
1.345 djm 2801: if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
1.421 djm 2802: debug3_fr(r, "sshkey_check_revoked");
1.345 djm 2803: goto done;
2804: }
1.344 djm 2805: }
2806:
1.421 djm 2807: if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,
1.432 djm 2808: sign_key, principal, sig_namespace, verify_time)) != 0) {
1.421 djm 2809: debug3_fr(r, "sshsig_check_allowed_keys");
1.344 djm 2810: goto done;
2811: }
2812: /* success */
2813: ret = 0;
2814: done:
2815: if (!quiet) {
2816: if (ret == 0) {
2817: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
1.421 djm 2818: SSH_FP_DEFAULT)) == NULL)
2819: fatal_f("sshkey_fingerprint failed");
1.350 djm 2820: if (principal == NULL) {
2821: printf("Good \"%s\" signature with %s key %s\n",
1.429 djm 2822: sig_namespace, sshkey_type(sign_key), fp);
1.350 djm 2823:
2824: } else {
2825: printf("Good \"%s\" signature for %s with %s key %s\n",
1.429 djm 2826: sig_namespace, principal,
2827: sshkey_type(sign_key), fp);
1.350 djm 2828: }
1.344 djm 2829: } else {
2830: printf("Could not verify signature.\n");
2831: }
2832: }
1.435 djm 2833: /* Print the signature key if requested */
2834: if (ret == 0 && print_pubkey && sign_key != NULL) {
2835: if ((r = sshkey_write(sign_key, stdout)) == 0)
2836: fputc('\n', stdout);
2837: else {
2838: error_r(r, "Could not print public key.\n");
2839: ret = -1;
2840: }
2841: }
1.344 djm 2842: sshbuf_free(sigbuf);
2843: sshbuf_free(abuf);
2844: sshkey_free(sign_key);
1.370 djm 2845: sshkey_sig_details_free(sig_details);
1.344 djm 2846: free(fp);
2847: return ret;
2848: }
2849:
1.386 djm 2850: static int
1.432 djm 2851: sig_find_principals(const char *signature, const char *allowed_keys,
2852: char * const *opts, size_t nopts)
2853: {
1.393 djm 2854: int r, ret = -1;
1.386 djm 2855: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2856: struct sshkey *sign_key = NULL;
1.391 djm 2857: char *principals = NULL, *cp, *tmp;
1.432 djm 2858: uint64_t verify_time = 0;
2859:
1.445 djm 2860: if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0)
1.432 djm 2861: goto done; /* error already logged */
1.386 djm 2862:
1.393 djm 2863: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2864: error_r(r, "Couldn't read signature file");
1.386 djm 2865: goto done;
2866: }
2867: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2868: error_fr(r, "sshsig_armor");
1.386 djm 2869: goto done;
2870: }
2871: if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
1.421 djm 2872: error_fr(r, "sshsig_get_pubkey");
1.386 djm 2873: goto done;
2874: }
1.388 djm 2875: if ((r = sshsig_find_principals(allowed_keys, sign_key,
1.432 djm 2876: verify_time, &principals)) != 0) {
1.431 djm 2877: if (r != SSH_ERR_KEY_NOT_FOUND)
2878: error_fr(r, "sshsig_find_principal");
1.386 djm 2879: goto done;
2880: }
2881: ret = 0;
2882: done:
2883: if (ret == 0 ) {
1.391 djm 2884: /* Emit matching principals one per line */
2885: tmp = principals;
2886: while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0')
2887: puts(cp);
1.386 djm 2888: } else {
1.391 djm 2889: fprintf(stderr, "No principal matched.\n");
1.386 djm 2890: }
2891: sshbuf_free(sigbuf);
2892: sshbuf_free(abuf);
2893: sshkey_free(sign_key);
1.388 djm 2894: free(principals);
1.386 djm 2895: return ret;
2896: }
2897:
1.441 djm 2898: static int
2899: sig_match_principals(const char *allowed_keys, char *principal,
2900: char * const *opts, size_t nopts)
2901: {
2902: int r;
2903: char **principals = NULL;
2904: size_t i, nprincipals = 0;
2905:
1.445 djm 2906: if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0)
1.441 djm 2907: return r; /* error already logged */
2908:
2909: if ((r = sshsig_match_principals(allowed_keys, principal,
2910: &principals, &nprincipals)) != 0) {
2911: debug_f("match: %s", ssh_err(r));
2912: fprintf(stderr, "No principal matched.\n");
2913: return r;
2914: }
2915: for (i = 0; i < nprincipals; i++) {
2916: printf("%s\n", principals[i]);
2917: free(principals[i]);
2918: }
2919: free(principals);
2920:
2921: return 0;
2922: }
2923:
1.223 djm 2924: static void
1.376 djm 2925: do_moduli_gen(const char *out_file, char **opts, size_t nopts)
2926: {
2927: #ifdef WITH_OPENSSL
2928: /* Moduli generation/screening */
2929: u_int32_t memory = 0;
2930: BIGNUM *start = NULL;
2931: int moduli_bits = 0;
2932: FILE *out;
2933: size_t i;
2934: const char *errstr;
2935:
2936: /* Parse options */
2937: for (i = 0; i < nopts; i++) {
2938: if (strncmp(opts[i], "memory=", 7) == 0) {
2939: memory = (u_int32_t)strtonum(opts[i]+7, 1,
2940: UINT_MAX, &errstr);
2941: if (errstr) {
2942: fatal("Memory limit is %s: %s",
2943: errstr, opts[i]+7);
2944: }
2945: } else if (strncmp(opts[i], "start=", 6) == 0) {
2946: /* XXX - also compare length against bits */
2947: if (BN_hex2bn(&start, opts[i]+6) == 0)
2948: fatal("Invalid start point.");
2949: } else if (strncmp(opts[i], "bits=", 5) == 0) {
2950: moduli_bits = (int)strtonum(opts[i]+5, 1,
2951: INT_MAX, &errstr);
2952: if (errstr) {
2953: fatal("Invalid number: %s (%s)",
2954: opts[i]+12, errstr);
2955: }
2956: } else {
2957: fatal("Option \"%s\" is unsupported for moduli "
2958: "generation", opts[i]);
2959: }
2960: }
2961:
2962: if ((out = fopen(out_file, "w")) == NULL) {
2963: fatal("Couldn't open modulus candidate file \"%s\": %s",
2964: out_file, strerror(errno));
2965: }
2966: setvbuf(out, NULL, _IOLBF, 0);
2967:
2968: if (moduli_bits == 0)
2969: moduli_bits = DEFAULT_BITS;
2970: if (gen_candidates(out, memory, moduli_bits, start) != 0)
2971: fatal("modulus candidate generation failed");
2972: #else /* WITH_OPENSSL */
2973: fatal("Moduli generation is not supported");
2974: #endif /* WITH_OPENSSL */
2975: }
2976:
2977: static void
2978: do_moduli_screen(const char *out_file, char **opts, size_t nopts)
2979: {
2980: #ifdef WITH_OPENSSL
2981: /* Moduli generation/screening */
2982: char *checkpoint = NULL;
2983: u_int32_t generator_wanted = 0;
2984: unsigned long start_lineno = 0, lines_to_process = 0;
2985: int prime_tests = 0;
2986: FILE *out, *in = stdin;
2987: size_t i;
2988: const char *errstr;
2989:
2990: /* Parse options */
2991: for (i = 0; i < nopts; i++) {
2992: if (strncmp(opts[i], "lines=", 6) == 0) {
2993: lines_to_process = strtoul(opts[i]+6, NULL, 10);
2994: } else if (strncmp(opts[i], "start-line=", 11) == 0) {
2995: start_lineno = strtoul(opts[i]+11, NULL, 10);
2996: } else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
1.465 dtucker 2997: free(checkpoint);
1.376 djm 2998: checkpoint = xstrdup(opts[i]+11);
2999: } else if (strncmp(opts[i], "generator=", 10) == 0) {
3000: generator_wanted = (u_int32_t)strtonum(
3001: opts[i]+10, 1, UINT_MAX, &errstr);
3002: if (errstr != NULL) {
3003: fatal("Generator invalid: %s (%s)",
3004: opts[i]+10, errstr);
3005: }
3006: } else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
3007: prime_tests = (int)strtonum(opts[i]+12, 1,
3008: INT_MAX, &errstr);
3009: if (errstr) {
3010: fatal("Invalid number: %s (%s)",
3011: opts[i]+12, errstr);
3012: }
3013: } else {
3014: fatal("Option \"%s\" is unsupported for moduli "
3015: "screening", opts[i]);
3016: }
3017: }
3018:
3019: if (have_identity && strcmp(identity_file, "-") != 0) {
3020: if ((in = fopen(identity_file, "r")) == NULL) {
3021: fatal("Couldn't open modulus candidate "
3022: "file \"%s\": %s", identity_file,
3023: strerror(errno));
3024: }
3025: }
3026:
3027: if ((out = fopen(out_file, "a")) == NULL) {
3028: fatal("Couldn't open moduli file \"%s\": %s",
3029: out_file, strerror(errno));
3030: }
3031: setvbuf(out, NULL, _IOLBF, 0);
3032: if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
3033: generator_wanted, checkpoint,
3034: start_lineno, lines_to_process) != 0)
3035: fatal("modulus screening failed");
1.465 dtucker 3036: if (in != stdin)
3037: (void)fclose(in);
1.464 dtucker 3038: free(checkpoint);
1.376 djm 3039: #else /* WITH_OPENSSL */
3040: fatal("Moduli screening is not supported");
3041: #endif /* WITH_OPENSSL */
3042: }
3043:
1.455 djm 3044: /* Read and confirm a passphrase */
1.381 djm 3045: static char *
1.455 djm 3046: read_check_passphrase(const char *prompt1, const char *prompt2,
3047: const char *retry_prompt)
1.381 djm 3048: {
3049: char *passphrase1, *passphrase2;
3050:
1.455 djm 3051: for (;;) {
3052: passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN);
3053: passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN);
3054: if (strcmp(passphrase1, passphrase2) == 0) {
1.381 djm 3055: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3056: return passphrase1;
1.381 djm 3057: }
1.455 djm 3058: /* The passphrases do not match. Clear them and retry. */
3059: freezero(passphrase1, strlen(passphrase1));
1.381 djm 3060: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3061: fputs(retry_prompt, stdout);
3062: fputc('\n', stdout);
3063: fflush(stdout);
1.381 djm 3064: }
1.455 djm 3065: /* NOTREACHED */
3066: return NULL;
3067: }
3068:
3069: static char *
3070: private_key_passphrase(void)
3071: {
3072: if (identity_passphrase)
3073: return xstrdup(identity_passphrase);
3074: if (identity_new_passphrase)
3075: return xstrdup(identity_new_passphrase);
3076:
3077: return read_check_passphrase(
3078: "Enter passphrase (empty for no passphrase): ",
3079: "Enter same passphrase again: ",
3080: "Passphrases do not match. Try again.");
1.381 djm 3081: }
3082:
1.439 djm 3083: static char *
3084: sk_suffix(const char *application, const uint8_t *user, size_t userlen)
1.381 djm 3085: {
1.439 djm 3086: char *ret, *cp;
3087: size_t slen, i;
3088:
3089: /* Trim off URL-like preamble */
3090: if (strncmp(application, "ssh://", 6) == 0)
3091: ret = xstrdup(application + 6);
3092: else if (strncmp(application, "ssh:", 4) == 0)
3093: ret = xstrdup(application + 4);
3094: else
3095: ret = xstrdup(application);
3096:
3097: /* Count trailing zeros in user */
3098: for (i = 0; i < userlen; i++) {
3099: if (user[userlen - i - 1] != 0)
3100: break;
3101: }
3102: if (i >= userlen)
3103: return ret; /* user-id was default all-zeros */
3104:
3105: /* Append user-id, escaping non-UTF-8 characters */
3106: slen = userlen - i;
3107: if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)
3108: fatal_f("asmprintf failed");
3109: /* Don't emit a user-id that contains path or control characters */
3110: if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||
3111: strchr(cp, '\\') != NULL) {
3112: free(cp);
3113: cp = tohex(user, slen);
3114: }
3115: xextendf(&ret, "_", "%s", cp);
3116: free(cp);
3117: return ret;
1.381 djm 3118: }
3119:
3120: static int
1.382 djm 3121: do_download_sk(const char *skprovider, const char *device)
1.381 djm 3122: {
1.439 djm 3123: struct sshsk_resident_key **srks;
3124: size_t nsrks, i;
1.412 djm 3125: int r, ret = -1;
1.403 djm 3126: char *fp, *pin = NULL, *pass = NULL, *path, *pubpath;
1.381 djm 3127: const char *ext;
1.439 djm 3128: struct sshkey *key;
1.381 djm 3129:
3130: if (skprovider == NULL)
3131: fatal("Cannot download keys without provider");
3132:
1.418 djm 3133: pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
3134: if (!quiet) {
3135: printf("You may need to touch your authenticator "
3136: "to authorize key download.\n");
3137: }
1.439 djm 3138: if ((r = sshsk_load_resident(skprovider, device, pin, 0,
3139: &srks, &nsrks)) != 0) {
1.418 djm 3140: if (pin != NULL)
3141: freezero(pin, strlen(pin));
1.421 djm 3142: error_r(r, "Unable to load resident keys");
1.418 djm 3143: return -1;
1.381 djm 3144: }
1.439 djm 3145: if (nsrks == 0)
1.381 djm 3146: logit("No keys to download");
1.411 djm 3147: if (pin != NULL)
3148: freezero(pin, strlen(pin));
1.381 djm 3149:
1.439 djm 3150: for (i = 0; i < nsrks; i++) {
3151: key = srks[i]->key;
3152: if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) {
1.381 djm 3153: error("Unsupported key type %s (%d)",
1.439 djm 3154: sshkey_type(key), key->type);
1.381 djm 3155: continue;
3156: }
1.439 djm 3157: if ((fp = sshkey_fingerprint(key, fingerprint_hash,
3158: SSH_FP_DEFAULT)) == NULL)
1.421 djm 3159: fatal_f("sshkey_fingerprint failed");
3160: debug_f("key %zu: %s %s %s (flags 0x%02x)", i,
1.439 djm 3161: sshkey_type(key), fp, key->sk_application, key->sk_flags);
3162: ext = sk_suffix(key->sk_application,
3163: srks[i]->user_id, srks[i]->user_id_len);
1.381 djm 3164: xasprintf(&path, "id_%s_rk%s%s",
1.439 djm 3165: key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
1.381 djm 3166: *ext == '\0' ? "" : "_", ext);
3167:
3168: /* If the file already exists, ask the user to confirm. */
3169: if (!confirm_overwrite(path)) {
3170: free(path);
3171: break;
3172: }
3173:
3174: /* Save the key with the application string as the comment */
3175: if (pass == NULL)
3176: pass = private_key_passphrase();
1.439 djm 3177: if ((r = sshkey_save_private(key, path, pass,
3178: key->sk_application, private_key_format,
1.381 djm 3179: openssh_format_cipher, rounds)) != 0) {
1.421 djm 3180: error_r(r, "Saving key \"%s\" failed", path);
1.381 djm 3181: free(path);
3182: break;
3183: }
3184: if (!quiet) {
1.439 djm 3185: printf("Saved %s key%s%s to %s\n", sshkey_type(key),
1.381 djm 3186: *ext != '\0' ? " " : "",
1.439 djm 3187: *ext != '\0' ? key->sk_application : "",
1.381 djm 3188: path);
3189: }
3190:
3191: /* Save public key too */
3192: xasprintf(&pubpath, "%s.pub", path);
3193: free(path);
1.439 djm 3194: if ((r = sshkey_save_public(key, pubpath,
3195: key->sk_application)) != 0) {
1.421 djm 3196: error_r(r, "Saving public key \"%s\" failed", pubpath);
1.402 markus 3197: free(pubpath);
1.381 djm 3198: break;
3199: }
3200: free(pubpath);
3201: }
3202:
1.439 djm 3203: if (i >= nsrks)
1.412 djm 3204: ret = 0; /* success */
1.381 djm 3205: if (pass != NULL)
3206: freezero(pass, strlen(pass));
1.439 djm 3207: sshsk_free_resident_keys(srks, nsrks);
1.412 djm 3208: return ret;
1.381 djm 3209: }
3210:
1.376 djm 3211: static void
1.420 djm 3212: save_attestation(struct sshbuf *attest, const char *path)
3213: {
3214: mode_t omask;
3215: int r;
3216:
3217: if (path == NULL)
3218: return; /* nothing to do */
3219: if (attest == NULL || sshbuf_len(attest) == 0)
3220: fatal("Enrollment did not return attestation data");
3221: omask = umask(077);
3222: r = sshbuf_write_file(path, attest);
3223: umask(omask);
3224: if (r != 0)
1.421 djm 3225: fatal_r(r, "Unable to write attestation data \"%s\"", path);
1.420 djm 3226: if (!quiet)
3227: printf("Your FIDO attestation certificate has been saved in "
3228: "%s\n", path);
3229: }
3230:
1.456 djm 3231: static int
3232: confirm_sk_overwrite(const char *application, const char *user)
3233: {
3234: char yesno[3];
3235:
3236: printf("A resident key scoped to '%s' with user id '%s' already "
3237: "exists.\n", application == NULL ? "ssh:" : application,
3238: user == NULL ? "null" : user);
3239: printf("Overwrite key in token (y/n)? ");
3240: fflush(stdout);
3241: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
3242: return 0;
3243: if (yesno[0] != 'y' && yesno[0] != 'Y')
3244: return 0;
3245: return 1;
3246: }
3247:
1.420 djm 3248: static void
1.10 markus 3249: usage(void)
3250: {
1.243 deraadt 3251: fprintf(stderr,
1.414 solene 3252: "usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"
3253: " [-m format] [-N new_passphrase] [-O option]\n"
1.369 naddy 3254: " [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
1.425 dtucker 3255: " [-w provider] [-Z cipher]\n"
1.414 solene 3256: " ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n"
1.425 dtucker 3257: " [-P old_passphrase] [-Z cipher]\n"
1.433 dtucker 3258: #ifdef WITH_OPENSSL
1.355 jmc 3259: " ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
3260: " ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
1.434 dtucker 3261: #endif
1.243 deraadt 3262: " ssh-keygen -y [-f input_keyfile]\n"
1.414 solene 3263: " ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n"
1.265 naddy 3264: " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
1.302 djm 3265: " ssh-keygen -B [-f input_keyfile]\n");
1.177 markus 3266: #ifdef ENABLE_PKCS11
1.243 deraadt 3267: fprintf(stderr,
3268: " ssh-keygen -D pkcs11\n");
1.177 markus 3269: #endif
1.243 deraadt 3270: fprintf(stderr,
1.352 jmc 3271: " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
1.243 deraadt 3272: " ssh-keygen -H [-f known_hosts_file]\n"
1.414 solene 3273: " ssh-keygen -K [-a rounds] [-w provider]\n"
1.243 deraadt 3274: " ssh-keygen -R hostname [-f known_hosts_file]\n"
1.352 jmc 3275: " ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
1.274 djm 3276: #ifdef WITH_OPENSSL
1.383 naddy 3277: " ssh-keygen -M generate [-O option] output_file\n"
3278: " ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
1.274 djm 3279: #endif
1.355 jmc 3280: " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
3281: " [-n principals] [-O option] [-V validity_interval]\n"
3282: " [-z serial_number] file ...\n"
1.243 deraadt 3283: " ssh-keygen -L [-f input_keyfile]\n"
1.414 solene 3284: " ssh-keygen -A [-a rounds] [-f prefix_path]\n"
1.243 deraadt 3285: " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
3286: " file ...\n"
1.405 djm 3287: " ssh-keygen -Q [-l] -f krl_file [file ...]\n"
1.388 djm 3288: " ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
1.442 djm 3289: " ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n"
1.355 jmc 3290: " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
1.445 djm 3291: " ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n"
1.355 jmc 3292: " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
1.445 djm 3293: " -n namespace -s signature_file [-r krl_file] [-O option]\n");
1.12 markus 3294: exit(1);
1.10 markus 3295: }
3296:
1.13 deraadt 3297: /*
3298: * Main program for key management.
3299: */
1.2 provos 3300: int
1.156 deraadt 3301: main(int argc, char **argv)
1.1 deraadt 3302: {
1.458 djm 3303: char comment[1024], *passphrase = NULL;
1.274 djm 3304: char *rr_hostname = NULL, *ep, *fp, *ra;
1.252 djm 3305: struct sshkey *private, *public;
1.12 markus 3306: struct passwd *pw;
1.381 djm 3307: int r, opt, type;
1.325 djm 3308: int change_passphrase = 0, change_comment = 0, show_cert = 0;
3309: int find_host = 0, delete_host = 0, hash_hosts = 0;
1.274 djm 3310: int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
1.325 djm 3311: int prefer_agent = 0, convert_to = 0, convert_from = 0;
1.326 djm 3312: int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
1.381 djm 3313: int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
1.380 djm 3314: unsigned long long cert_serial = 0;
1.375 djm 3315: char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
1.382 djm 3316: char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
1.420 djm 3317: char *sk_attestation_path = NULL;
1.395 djm 3318: struct sshbuf *challenge = NULL, *attest = NULL;
1.375 djm 3319: size_t i, nopts = 0;
1.340 dtucker 3320: u_int32_t bits = 0;
1.357 djm 3321: uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
1.274 djm 3322: const char *errstr;
1.325 djm 3323: int log_level = SYSLOG_LEVEL_INFO;
1.344 djm 3324: char *sign_op = NULL;
1.33 markus 3325:
1.12 markus 3326: extern int optind;
3327: extern char *optarg;
1.129 djm 3328:
3329: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
3330: sanitise_stdfd();
1.12 markus 3331:
1.348 djm 3332: #ifdef WITH_OPENSSL
1.201 djm 3333: OpenSSL_add_all_algorithms();
1.348 djm 3334: #endif
1.156 deraadt 3335: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.294 djm 3336:
3337: setlocale(LC_CTYPE, "");
1.19 markus 3338:
1.14 markus 3339: /* we need this for the home * directory. */
1.12 markus 3340: pw = getpwuid(getuid());
1.269 djm 3341: if (!pw)
3342: fatal("No user exists for uid %lu", (u_long)getuid());
1.428 djm 3343: pw = pwcopy(pw);
1.333 deraadt 3344: if (gethostname(hostname, sizeof(hostname)) == -1)
1.269 djm 3345: fatal("gethostname: %s", strerror(errno));
1.14 markus 3346:
1.357 djm 3347: sk_provider = getenv("SSH_SK_PROVIDER");
3348:
1.381 djm 3349: /* Remaining characters: dGjJSTWx */
3350: while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
1.376 djm 3351: "C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
1.380 djm 3352: "a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
1.12 markus 3353: switch (opt) {
1.206 stevesk 3354: case 'A':
3355: gen_all_hostkeys = 1;
3356: break;
1.12 markus 3357: case 'b':
1.340 dtucker 3358: bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
3359: &errstr);
1.125 avsm 3360: if (errstr)
3361: fatal("Bits has bad value %s (%s)",
3362: optarg, errstr);
1.12 markus 3363: break;
1.251 djm 3364: case 'E':
3365: fingerprint_hash = ssh_digest_alg_by_name(optarg);
3366: if (fingerprint_hash == -1)
3367: fatal("Invalid hash algorithm \"%s\"", optarg);
3368: break;
1.119 djm 3369: case 'F':
3370: find_host = 1;
3371: rr_hostname = optarg;
3372: break;
3373: case 'H':
3374: hash_hosts = 1;
3375: break;
1.179 djm 3376: case 'I':
3377: cert_key_id = optarg;
3378: break;
1.119 djm 3379: case 'R':
3380: delete_host = 1;
3381: rr_hostname = optarg;
3382: break;
1.182 djm 3383: case 'L':
3384: show_cert = 1;
3385: break;
1.12 markus 3386: case 'l':
3387: print_fingerprint = 1;
3388: break;
1.49 markus 3389: case 'B':
3390: print_bubblebabble = 1;
3391: break;
1.193 djm 3392: case 'm':
3393: if (strcasecmp(optarg, "RFC4716") == 0 ||
3394: strcasecmp(optarg, "ssh2") == 0) {
3395: convert_format = FMT_RFC4716;
3396: break;
3397: }
3398: if (strcasecmp(optarg, "PKCS8") == 0) {
3399: convert_format = FMT_PKCS8;
1.336 djm 3400: private_key_format = SSHKEY_PRIVATE_PKCS8;
1.193 djm 3401: break;
3402: }
3403: if (strcasecmp(optarg, "PEM") == 0) {
3404: convert_format = FMT_PEM;
1.336 djm 3405: private_key_format = SSHKEY_PRIVATE_PEM;
1.193 djm 3406: break;
3407: }
3408: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 3409: case 'n':
3410: cert_principals = optarg;
3411: break;
1.237 markus 3412: case 'o':
1.319 djm 3413: /* no-op; new format is already the default */
1.237 markus 3414: break;
1.12 markus 3415: case 'p':
3416: change_passphrase = 1;
3417: break;
3418: case 'c':
3419: change_comment = 1;
3420: break;
3421: case 'f':
1.274 djm 3422: if (strlcpy(identity_file, optarg,
3423: sizeof(identity_file)) >= sizeof(identity_file))
1.124 avsm 3424: fatal("Identity filename too long");
1.12 markus 3425: have_identity = 1;
3426: break;
1.105 jakob 3427: case 'g':
3428: print_generic = 1;
3429: break;
1.381 djm 3430: case 'K':
3431: download_sk = 1;
3432: break;
1.12 markus 3433: case 'P':
3434: identity_passphrase = optarg;
3435: break;
3436: case 'N':
3437: identity_new_passphrase = optarg;
3438: break;
1.223 djm 3439: case 'Q':
3440: check_krl = 1;
3441: break;
1.179 djm 3442: case 'O':
1.375 djm 3443: opts = xrecallocarray(opts, nopts, nopts + 1,
3444: sizeof(*opts));
3445: opts[nopts++] = xstrdup(optarg);
1.179 djm 3446: break;
1.237 markus 3447: case 'Z':
1.336 djm 3448: openssh_format_cipher = optarg;
1.425 dtucker 3449: if (cipher_by_name(openssh_format_cipher) == NULL)
3450: fatal("Invalid OpenSSH-format cipher '%s'",
3451: openssh_format_cipher);
1.237 markus 3452: break;
1.12 markus 3453: case 'C':
3454: identity_comment = optarg;
3455: break;
3456: case 'q':
3457: quiet = 1;
1.20 deraadt 3458: break;
1.57 markus 3459: case 'e':
3460: /* export key */
1.193 djm 3461: convert_to = 1;
1.19 markus 3462: break;
1.179 djm 3463: case 'h':
3464: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 3465: certflags_flags = 0;
1.179 djm 3466: break;
1.223 djm 3467: case 'k':
3468: gen_krl = 1;
3469: break;
1.57 markus 3470: case 'i':
1.19 markus 3471: case 'X':
1.57 markus 3472: /* import key */
1.193 djm 3473: convert_from = 1;
1.19 markus 3474: break;
3475: case 'y':
3476: print_public = 1;
3477: break;
1.179 djm 3478: case 's':
3479: ca_key_path = optarg;
3480: break;
1.33 markus 3481: case 't':
3482: key_type_name = optarg;
3483: break;
1.75 markus 3484: case 'D':
1.177 markus 3485: pkcs11provider = optarg;
1.305 djm 3486: break;
3487: case 'U':
3488: prefer_agent = 1;
1.66 markus 3489: break;
1.223 djm 3490: case 'u':
3491: update_krl = 1;
3492: break;
1.113 djm 3493: case 'v':
3494: if (log_level == SYSLOG_LEVEL_INFO)
3495: log_level = SYSLOG_LEVEL_DEBUG1;
3496: else {
1.117 deraadt 3497: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 3498: log_level < SYSLOG_LEVEL_DEBUG3)
3499: log_level++;
3500: }
3501: break;
1.105 jakob 3502: case 'r':
1.119 djm 3503: rr_hostname = optarg;
1.105 jakob 3504: break;
1.107 djm 3505: case 'a':
1.237 markus 3506: rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
1.124 avsm 3507: if (errstr)
1.237 markus 3508: fatal("Invalid number: %s (%s)",
1.124 avsm 3509: optarg, errstr);
1.107 djm 3510: break;
1.274 djm 3511: case 'V':
3512: parse_cert_times(optarg);
3513: break;
1.344 djm 3514: case 'Y':
3515: sign_op = optarg;
1.365 djm 3516: break;
1.357 djm 3517: case 'w':
3518: sk_provider = optarg;
3519: break;
1.274 djm 3520: case 'z':
3521: errno = 0;
1.326 djm 3522: if (*optarg == '+') {
3523: cert_serial_autoinc = 1;
3524: optarg++;
3525: }
1.274 djm 3526: cert_serial = strtoull(optarg, &ep, 10);
3527: if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
3528: (errno == ERANGE && cert_serial == ULLONG_MAX))
3529: fatal("Invalid serial number \"%s\"", optarg);
1.107 djm 3530: break;
1.274 djm 3531: case 'M':
1.376 djm 3532: if (strcmp(optarg, "generate") == 0)
3533: do_gen_candidates = 1;
3534: else if (strcmp(optarg, "screen") == 0)
3535: do_screen_candidates = 1;
3536: else
3537: fatal("Unsupported moduli option %s", optarg);
1.179 djm 3538: break;
1.12 markus 3539: default:
3540: usage();
3541: }
3542: }
1.364 djm 3543:
3544: if (sk_provider == NULL)
3545: sk_provider = "internal";
1.113 djm 3546:
3547: /* reinit */
1.156 deraadt 3548: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 3549:
1.179 djm 3550: argv += optind;
3551: argc -= optind;
1.344 djm 3552:
3553: if (sign_op != NULL) {
1.388 djm 3554: if (strncmp(sign_op, "find-principals", 15) == 0) {
1.386 djm 3555: if (ca_key_path == NULL) {
1.388 djm 3556: error("Too few arguments for find-principals:"
1.429 djm 3557: "missing signature file");
1.386 djm 3558: exit(1);
3559: }
3560: if (!have_identity) {
1.388 djm 3561: error("Too few arguments for find-principals:"
1.429 djm 3562: "missing allowed keys file");
1.386 djm 3563: exit(1);
3564: }
1.432 djm 3565: return sig_find_principals(ca_key_path, identity_file,
1.441 djm 3566: opts, nopts);
3567: } else if (strncmp(sign_op, "match-principals", 16) == 0) {
3568: if (!have_identity) {
3569: error("Too few arguments for match-principals:"
3570: "missing allowed keys file");
3571: exit(1);
3572: }
3573: if (cert_key_id == NULL) {
3574: error("Too few arguments for match-principals: "
3575: "missing principal ID");
3576: exit(1);
3577: }
3578: return sig_match_principals(identity_file, cert_key_id,
1.432 djm 3579: opts, nopts);
1.391 djm 3580: } else if (strncmp(sign_op, "sign", 4) == 0) {
1.447 djm 3581: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3582: if (cert_principals == NULL ||
3583: *cert_principals == '\0') {
3584: error("Too few arguments for sign: "
3585: "missing namespace");
3586: exit(1);
3587: }
1.344 djm 3588: if (!have_identity) {
3589: error("Too few arguments for sign: "
3590: "missing key");
3591: exit(1);
3592: }
1.386 djm 3593: return sig_sign(identity_file, cert_principals,
1.452 djm 3594: prefer_agent, argc, argv, opts, nopts);
1.350 djm 3595: } else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
1.450 djm 3596: /* NB. cert_principals is actually namespace, via -n */
1.449 djm 3597: if (cert_principals == NULL ||
3598: *cert_principals == '\0') {
3599: error("Too few arguments for check-novalidate: "
3600: "missing namespace");
3601: exit(1);
3602: }
1.350 djm 3603: if (ca_key_path == NULL) {
3604: error("Too few arguments for check-novalidate: "
1.429 djm 3605: "missing signature file");
1.350 djm 3606: exit(1);
3607: }
1.386 djm 3608: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3609: NULL, NULL, NULL, opts, nopts);
1.344 djm 3610: } else if (strncmp(sign_op, "verify", 6) == 0) {
1.447 djm 3611: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3612: if (cert_principals == NULL ||
3613: *cert_principals == '\0') {
3614: error("Too few arguments for verify: "
1.447 djm 3615: "missing namespace");
1.391 djm 3616: exit(1);
3617: }
1.344 djm 3618: if (ca_key_path == NULL) {
3619: error("Too few arguments for verify: "
3620: "missing signature file");
3621: exit(1);
3622: }
3623: if (!have_identity) {
3624: error("Too few arguments for sign: "
3625: "missing allowed keys file");
3626: exit(1);
3627: }
3628: if (cert_key_id == NULL) {
3629: error("Too few arguments for verify: "
1.447 djm 3630: "missing principal identity");
1.344 djm 3631: exit(1);
3632: }
1.386 djm 3633: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3634: cert_key_id, identity_file, rr_hostname,
3635: opts, nopts);
1.344 djm 3636: }
1.391 djm 3637: error("Unsupported operation for -Y: \"%s\"", sign_op);
1.344 djm 3638: usage();
3639: /* NOTREACHED */
3640: }
1.179 djm 3641:
3642: if (ca_key_path != NULL) {
1.223 djm 3643: if (argc < 1 && !gen_krl) {
1.269 djm 3644: error("Too few arguments.");
1.179 djm 3645: usage();
3646: }
1.376 djm 3647: } else if (argc > 0 && !gen_krl && !check_krl &&
3648: !do_gen_candidates && !do_screen_candidates) {
1.269 djm 3649: error("Too many arguments.");
1.87 djm 3650: usage();
3651: }
1.12 markus 3652: if (change_passphrase && change_comment) {
1.269 djm 3653: error("Can only have one of -p and -c.");
1.166 djm 3654: usage();
3655: }
3656: if (print_fingerprint && (delete_host || hash_hosts)) {
1.269 djm 3657: error("Cannot use -l with -H or -R.");
1.12 markus 3658: usage();
1.223 djm 3659: }
1.376 djm 3660: if (gen_krl) {
1.325 djm 3661: do_gen_krl(pw, update_krl, ca_key_path,
3662: cert_serial, identity_comment, argc, argv);
1.223 djm 3663: return (0);
3664: }
3665: if (check_krl) {
1.405 djm 3666: do_check_krl(pw, print_fingerprint, argc, argv);
1.223 djm 3667: return (0);
1.179 djm 3668: }
3669: if (ca_key_path != NULL) {
3670: if (cert_key_id == NULL)
3671: fatal("Must specify key id (-I) when certifying");
1.375 djm 3672: for (i = 0; i < nopts; i++)
3673: add_cert_option(opts[i]);
1.326 djm 3674: do_ca_sign(pw, ca_key_path, prefer_agent,
3675: cert_serial, cert_serial_autoinc, argc, argv);
1.12 markus 3676: }
1.182 djm 3677: if (show_cert)
3678: do_show_cert(pw);
1.325 djm 3679: if (delete_host || hash_hosts || find_host) {
3680: do_known_hosts(pw, rr_hostname, find_host,
3681: delete_host, hash_hosts);
3682: }
1.221 djm 3683: if (pkcs11provider != NULL)
3684: do_download(pw);
1.382 djm 3685: if (download_sk) {
3686: for (i = 0; i < nopts; i++) {
3687: if (strncasecmp(opts[i], "device=", 7) == 0) {
3688: sk_device = xstrdup(opts[i] + 7);
3689: } else {
3690: fatal("Option \"%s\" is unsupported for "
3691: "FIDO authenticator download", opts[i]);
3692: }
3693: }
3694: return do_download_sk(sk_provider, sk_device);
3695: }
1.49 markus 3696: if (print_fingerprint || print_bubblebabble)
1.12 markus 3697: do_fingerprint(pw);
3698: if (change_passphrase)
3699: do_change_passphrase(pw);
3700: if (change_comment)
1.325 djm 3701: do_change_comment(pw, identity_comment);
1.246 markus 3702: #ifdef WITH_OPENSSL
1.193 djm 3703: if (convert_to)
3704: do_convert_to(pw);
3705: if (convert_from)
3706: do_convert_from(pw);
1.349 djm 3707: #else /* WITH_OPENSSL */
3708: if (convert_to || convert_from)
3709: fatal("key conversion disabled at compile time");
3710: #endif /* WITH_OPENSSL */
1.19 markus 3711: if (print_public)
3712: do_print_public(pw);
1.119 djm 3713: if (rr_hostname != NULL) {
1.138 jakob 3714: unsigned int n = 0;
3715:
3716: if (have_identity) {
1.325 djm 3717: n = do_print_resource_record(pw, identity_file,
1.462 djm 3718: rr_hostname, print_generic, opts, nopts);
1.269 djm 3719: if (n == 0)
3720: fatal("%s: %s", identity_file, strerror(errno));
1.138 jakob 3721: exit(0);
3722: } else {
3723:
3724: n += do_print_resource_record(pw,
1.325 djm 3725: _PATH_HOST_RSA_KEY_FILE, rr_hostname,
1.462 djm 3726: print_generic, opts, nopts);
1.138 jakob 3727: n += do_print_resource_record(pw,
1.325 djm 3728: _PATH_HOST_DSA_KEY_FILE, rr_hostname,
1.462 djm 3729: print_generic, opts, nopts);
1.214 djm 3730: n += do_print_resource_record(pw,
1.325 djm 3731: _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
1.462 djm 3732: print_generic, opts, nopts);
1.244 logan 3733: n += do_print_resource_record(pw,
1.325 djm 3734: _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
1.462 djm 3735: print_generic, opts, nopts);
1.313 markus 3736: n += do_print_resource_record(pw,
1.325 djm 3737: _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
1.462 djm 3738: print_generic, opts, nopts);
1.138 jakob 3739: if (n == 0)
3740: fatal("no keys found.");
3741: exit(0);
3742: }
1.105 jakob 3743: }
1.107 djm 3744:
1.376 djm 3745: if (do_gen_candidates || do_screen_candidates) {
3746: if (argc <= 0)
3747: fatal("No output file specified");
3748: else if (argc > 1)
3749: fatal("Too many output files specified");
3750: }
1.107 djm 3751: if (do_gen_candidates) {
1.376 djm 3752: do_moduli_gen(argv[0], opts, nopts);
3753: return 0;
1.107 djm 3754: }
3755: if (do_screen_candidates) {
1.376 djm 3756: do_moduli_screen(argv[0], opts, nopts);
3757: return 0;
1.75 markus 3758: }
1.12 markus 3759:
1.206 stevesk 3760: if (gen_all_hostkeys) {
3761: do_gen_all_hostkeys(pw);
3762: return (0);
3763: }
3764:
1.133 djm 3765: if (key_type_name == NULL)
1.273 djm 3766: key_type_name = DEFAULT_KEY_TYPE_NAME;
1.133 djm 3767:
1.252 djm 3768: type = sshkey_type_from_name(key_type_name);
1.255 djm 3769: type_bits_valid(type, key_type_name, &bits);
1.206 stevesk 3770:
1.33 markus 3771: if (!quiet)
1.252 djm 3772: printf("Generating public/private %s key pair.\n",
3773: key_type_name);
1.362 markus 3774: switch (type) {
3775: case KEY_ECDSA_SK:
3776: case KEY_ED25519_SK:
1.380 djm 3777: for (i = 0; i < nopts; i++) {
3778: if (strcasecmp(opts[i], "no-touch-required") == 0) {
3779: sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
1.416 djm 3780: } else if (strcasecmp(opts[i], "verify-required") == 0) {
3781: sk_flags |= SSH_SK_USER_VERIFICATION_REQD;
1.380 djm 3782: } else if (strcasecmp(opts[i], "resident") == 0) {
3783: sk_flags |= SSH_SK_RESIDENT_KEY;
1.382 djm 3784: } else if (strncasecmp(opts[i], "device=", 7) == 0) {
3785: sk_device = xstrdup(opts[i] + 7);
3786: } else if (strncasecmp(opts[i], "user=", 5) == 0) {
3787: sk_user = xstrdup(opts[i] + 5);
1.395 djm 3788: } else if (strncasecmp(opts[i], "challenge=", 10) == 0) {
3789: if ((r = sshbuf_load_file(opts[i] + 10,
3790: &challenge)) != 0) {
1.421 djm 3791: fatal_r(r, "Unable to load FIDO "
3792: "enrollment challenge \"%s\"",
3793: opts[i] + 10);
1.395 djm 3794: }
3795: } else if (strncasecmp(opts[i],
3796: "write-attestation=", 18) == 0) {
1.420 djm 3797: sk_attestation_path = opts[i] + 18;
1.382 djm 3798: } else if (strncasecmp(opts[i],
3799: "application=", 12) == 0) {
3800: sk_application = xstrdup(opts[i] + 12);
1.396 djm 3801: if (strncmp(sk_application, "ssh:", 4) != 0) {
3802: fatal("FIDO application string must "
3803: "begin with \"ssh:\"");
3804: }
1.380 djm 3805: } else {
3806: fatal("Option \"%s\" is unsupported for "
3807: "FIDO authenticator enrollment", opts[i]);
3808: }
3809: }
1.395 djm 3810: if ((attest = sshbuf_new()) == NULL)
3811: fatal("sshbuf_new failed");
1.457 djm 3812: r = 0;
3813: for (i = 0 ;;) {
3814: if (!quiet) {
3815: printf("You may need to touch your "
3816: "authenticator%s to authorize key "
3817: "generation.\n",
3818: r == 0 ? "" : " again");
3819: }
1.379 djm 3820: fflush(stdout);
1.382 djm 3821: r = sshsk_enroll(type, sk_provider, sk_device,
3822: sk_application == NULL ? "ssh:" : sk_application,
1.395 djm 3823: sk_user, sk_flags, passphrase, challenge,
3824: &private, attest);
1.379 djm 3825: if (r == 0)
3826: break;
1.456 djm 3827: if (r == SSH_ERR_KEY_BAD_PERMISSIONS &&
3828: (sk_flags & SSH_SK_RESIDENT_KEY) != 0 &&
3829: (sk_flags & SSH_SK_FORCE_OPERATION) == 0 &&
3830: confirm_sk_overwrite(sk_application, sk_user)) {
3831: sk_flags |= SSH_SK_FORCE_OPERATION;
3832: continue;
3833: }
1.379 djm 3834: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 3835: fatal_r(r, "Key enrollment failed");
1.418 djm 3836: else if (passphrase != NULL) {
1.398 djm 3837: error("PIN incorrect");
1.381 djm 3838: freezero(passphrase, strlen(passphrase));
1.398 djm 3839: passphrase = NULL;
3840: }
1.457 djm 3841: if (++i >= 3)
1.398 djm 3842: fatal("Too many incorrect PINs");
1.397 naddy 3843: passphrase = read_passphrase("Enter PIN for "
3844: "authenticator: ", RP_ALLOW_STDIN);
1.373 djm 3845: }
1.398 djm 3846: if (passphrase != NULL) {
1.381 djm 3847: freezero(passphrase, strlen(passphrase));
1.398 djm 3848: passphrase = NULL;
3849: }
1.362 markus 3850: break;
3851: default:
3852: if ((r = sshkey_generate(type, bits, &private)) != 0)
3853: fatal("sshkey_generate failed");
3854: break;
3855: }
1.269 djm 3856: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 3857: fatal_r(r, "sshkey_from_private");
1.12 markus 3858:
3859: if (!have_identity)
3860: ask_filename(pw, "Enter file in which to save the key");
3861:
1.132 djm 3862: /* Create ~/.ssh directory if it doesn't already exist. */
1.413 dtucker 3863: hostfile_create_user_ssh_dir(identity_file, !quiet);
3864:
1.12 markus 3865: /* If the file already exists, ask the user to confirm. */
1.343 djm 3866: if (!confirm_overwrite(identity_file))
3867: exit(1);
1.12 markus 3868:
1.381 djm 3869: /* Determine the passphrase for the private key */
3870: passphrase = private_key_passphrase();
1.12 markus 3871: if (identity_comment) {
3872: strlcpy(comment, identity_comment, sizeof(comment));
3873: } else {
1.172 stevesk 3874: /* Create default comment field for the passphrase. */
1.12 markus 3875: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
3876: }
3877:
3878: /* Save the key with the given passphrase and comment. */
1.381 djm 3879: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 3880: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 3881: error_r(r, "Saving key \"%s\" failed", identity_file);
1.381 djm 3882: freezero(passphrase, strlen(passphrase));
1.12 markus 3883: exit(1);
3884: }
1.381 djm 3885: freezero(passphrase, strlen(passphrase));
1.252 djm 3886: sshkey_free(private);
1.12 markus 3887:
1.381 djm 3888: if (!quiet) {
1.387 djm 3889: printf("Your identification has been saved in %s\n",
1.381 djm 3890: identity_file);
3891: }
1.12 markus 3892:
3893: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 3894: if ((r = sshkey_save_public(public, identity_file, comment)) != 0)
3895: fatal_r(r, "Unable to save public key to %s", identity_file);
1.12 markus 3896:
3897: if (!quiet) {
1.259 djm 3898: fp = sshkey_fingerprint(public, fingerprint_hash,
1.251 djm 3899: SSH_FP_DEFAULT);
1.259 djm 3900: ra = sshkey_fingerprint(public, fingerprint_hash,
1.167 grunk 3901: SSH_FP_RANDOMART);
1.259 djm 3902: if (fp == NULL || ra == NULL)
3903: fatal("sshkey_fingerprint failed");
1.387 djm 3904: printf("Your public key has been saved in %s\n",
1.19 markus 3905: identity_file);
1.12 markus 3906: printf("The key fingerprint is:\n");
1.50 markus 3907: printf("%s %s\n", fp, comment);
1.167 grunk 3908: printf("The key's randomart image is:\n");
3909: printf("%s\n", ra);
1.227 djm 3910: free(ra);
3911: free(fp);
1.12 markus 3912: }
1.19 markus 3913:
1.420 djm 3914: if (sk_attestation_path != NULL)
3915: save_attestation(attest, sk_attestation_path);
3916:
1.395 djm 3917: sshbuf_free(attest);
1.252 djm 3918: sshkey_free(public);
1.395 djm 3919:
1.12 markus 3920: exit(0);
1.1 deraadt 3921: }
![[BACK]](/icons/back.gif){kind=icon}
Return to ssh-keygen.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh