Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.465
1.465 ! dtucker 1: /* $OpenBSD: ssh-keygen.c,v 1.464 2023/03/05 08:18:58 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;
1.252 djm 462: u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
463: int r, rlen, ktype;
464: u_int magic, i1, i2, i3, i4;
465: size_t slen;
1.62 markus 466: u_long e;
1.321 djm 467: BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
468: BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
469: BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
470: BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
1.337 djm 471:
1.252 djm 472: if ((r = sshbuf_get_u32(b, &magic)) != 0)
1.421 djm 473: fatal_fr(r, "parse magic");
1.32 markus 474:
475: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
1.252 djm 476: error("bad magic 0x%x != 0x%x", magic,
477: SSH_COM_PRIVATE_KEY_MAGIC);
1.32 markus 478: return NULL;
479: }
1.252 djm 480: if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
481: (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
482: (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
483: (r = sshbuf_get_u32(b, &i2)) != 0 ||
484: (r = sshbuf_get_u32(b, &i3)) != 0 ||
485: (r = sshbuf_get_u32(b, &i4)) != 0)
1.421 djm 486: fatal_fr(r, "parse");
1.158 stevesk 487: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 488: if (strcmp(cipher, "none") != 0) {
489: error("unsupported cipher %s", cipher);
1.227 djm 490: free(cipher);
491: free(type);
1.32 markus 492: return NULL;
493: }
1.227 djm 494: free(cipher);
1.32 markus 495:
1.53 markus 496: if (strstr(type, "dsa")) {
497: ktype = KEY_DSA;
498: } else if (strstr(type, "rsa")) {
499: ktype = KEY_RSA;
500: } else {
1.227 djm 501: free(type);
1.32 markus 502: return NULL;
503: }
1.322 djm 504: if ((key = sshkey_new(ktype)) == NULL)
505: fatal("sshkey_new failed");
1.227 djm 506: free(type);
1.53 markus 507:
508: switch (key->type) {
509: case KEY_DSA:
1.321 djm 510: if ((dsa_p = BN_new()) == NULL ||
511: (dsa_q = BN_new()) == NULL ||
512: (dsa_g = BN_new()) == NULL ||
513: (dsa_pub_key = BN_new()) == NULL ||
514: (dsa_priv_key = BN_new()) == NULL)
1.421 djm 515: fatal_f("BN_new");
1.321 djm 516: buffer_get_bignum_bits(b, dsa_p);
517: buffer_get_bignum_bits(b, dsa_g);
518: buffer_get_bignum_bits(b, dsa_q);
519: buffer_get_bignum_bits(b, dsa_pub_key);
520: buffer_get_bignum_bits(b, dsa_priv_key);
521: if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
1.421 djm 522: fatal_f("DSA_set0_pqg failed");
1.321 djm 523: dsa_p = dsa_q = dsa_g = NULL; /* transferred */
524: if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
1.421 djm 525: fatal_f("DSA_set0_key failed");
1.321 djm 526: dsa_pub_key = dsa_priv_key = NULL; /* transferred */
1.53 markus 527: break;
528: case KEY_RSA:
1.252 djm 529: if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
530: (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
531: (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
1.421 djm 532: fatal_fr(r, "parse RSA");
1.252 djm 533: e = e1;
1.62 markus 534: debug("e %lx", e);
535: if (e < 30) {
536: e <<= 8;
1.252 djm 537: e += e2;
1.62 markus 538: debug("e %lx", e);
539: e <<= 8;
1.252 djm 540: e += e3;
1.62 markus 541: debug("e %lx", e);
542: }
1.321 djm 543: if ((rsa_e = BN_new()) == NULL)
1.421 djm 544: fatal_f("BN_new");
1.321 djm 545: if (!BN_set_word(rsa_e, e)) {
546: BN_clear_free(rsa_e);
1.252 djm 547: sshkey_free(key);
1.53 markus 548: return NULL;
549: }
1.321 djm 550: if ((rsa_n = BN_new()) == NULL ||
551: (rsa_d = BN_new()) == NULL ||
552: (rsa_p = BN_new()) == NULL ||
553: (rsa_q = BN_new()) == NULL ||
554: (rsa_iqmp = BN_new()) == NULL)
1.421 djm 555: fatal_f("BN_new");
1.321 djm 556: buffer_get_bignum_bits(b, rsa_d);
557: buffer_get_bignum_bits(b, rsa_n);
558: buffer_get_bignum_bits(b, rsa_iqmp);
559: buffer_get_bignum_bits(b, rsa_q);
560: buffer_get_bignum_bits(b, rsa_p);
561: if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
1.421 djm 562: fatal_f("RSA_set0_key failed");
1.321 djm 563: rsa_n = rsa_e = rsa_d = NULL; /* transferred */
564: if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
1.421 djm 565: fatal_f("RSA_set0_factors failed");
1.321 djm 566: rsa_p = rsa_q = NULL; /* transferred */
567: if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
1.421 djm 568: fatal_fr(r, "generate RSA parameters");
1.321 djm 569: BN_clear_free(rsa_iqmp);
1.53 markus 570: break;
571: }
1.252 djm 572: rlen = sshbuf_len(b);
1.85 deraadt 573: if (rlen != 0)
1.421 djm 574: error_f("remaining bytes in key blob %d", rlen);
1.64 markus 575:
576: /* try the key */
1.455 djm 577: if ((r = sshkey_sign(key, &sig, &slen, data, sizeof(data),
578: NULL, NULL, NULL, 0)) != 0)
579: error_fr(r, "signing with converted key failed");
580: else if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
581: NULL, 0, NULL)) != 0)
582: error_fr(r, "verification with converted key failed");
583: if (r != 0) {
1.252 djm 584: sshkey_free(key);
585: free(sig);
586: return NULL;
587: }
1.227 djm 588: free(sig);
1.32 markus 589: return key;
590: }
591:
1.137 dtucker 592: static int
593: get_line(FILE *fp, char *line, size_t len)
594: {
595: int c;
596: size_t pos = 0;
597:
598: line[0] = '\0';
599: while ((c = fgetc(fp)) != EOF) {
1.269 djm 600: if (pos >= len - 1)
601: fatal("input line too long.");
1.140 deraadt 602: switch (c) {
1.137 dtucker 603: case '\r':
604: c = fgetc(fp);
1.269 djm 605: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
606: fatal("unget: %s", strerror(errno));
1.137 dtucker 607: return pos;
608: case '\n':
609: return pos;
610: }
611: line[pos++] = c;
612: line[pos] = '\0';
613: }
1.157 stevesk 614: /* We reached EOF */
615: return -1;
1.137 dtucker 616: }
617:
1.63 itojun 618: static void
1.252 djm 619: do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
1.19 markus 620: {
1.252 djm 621: int r, blen, escaped = 0;
1.98 markus 622: u_int len;
1.137 dtucker 623: char line[1024];
1.337 djm 624: struct sshbuf *buf;
1.19 markus 625: char encoded[8096];
626: FILE *fp;
627:
1.337 djm 628: if ((buf = sshbuf_new()) == NULL)
629: fatal("sshbuf_new failed");
1.191 djm 630: if ((fp = fopen(identity_file, "r")) == NULL)
631: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 632: encoded[0] = '\0';
1.137 dtucker 633: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
1.228 djm 634: if (blen > 0 && line[blen - 1] == '\\')
1.25 markus 635: escaped++;
1.19 markus 636: if (strncmp(line, "----", 4) == 0 ||
637: strstr(line, ": ") != NULL) {
1.32 markus 638: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 639: *private = 1;
1.64 markus 640: if (strstr(line, " END ") != NULL) {
641: break;
642: }
1.60 markus 643: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 644: continue;
645: }
1.25 markus 646: if (escaped) {
647: escaped--;
1.60 markus 648: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 649: continue;
1.19 markus 650: }
651: strlcat(encoded, line, sizeof(encoded));
652: }
1.98 markus 653: len = strlen(encoded);
654: if (((len % 4) == 3) &&
655: (encoded[len-1] == '=') &&
656: (encoded[len-2] == '=') &&
657: (encoded[len-3] == '='))
658: encoded[len-3] = '\0';
1.337 djm 659: if ((r = sshbuf_b64tod(buf, encoded)) != 0)
1.421 djm 660: fatal_fr(r, "base64 decode");
1.408 djm 661: if (*private) {
662: if ((*k = do_convert_private_ssh2(buf)) == NULL)
1.421 djm 663: fatal_f("private key conversion failed");
1.408 djm 664: } else if ((r = sshkey_fromb(buf, k)) != 0)
1.421 djm 665: fatal_fr(r, "parse key");
1.356 djm 666: sshbuf_free(buf);
1.193 djm 667: fclose(fp);
668: }
669:
670: static void
1.252 djm 671: do_convert_from_pkcs8(struct sshkey **k, int *private)
1.193 djm 672: {
673: EVP_PKEY *pubkey;
674: FILE *fp;
675:
676: if ((fp = fopen(identity_file, "r")) == NULL)
677: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
678: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
1.421 djm 679: fatal_f("%s is not a recognised public key format",
1.193 djm 680: identity_file);
681: }
682: fclose(fp);
1.321 djm 683: switch (EVP_PKEY_base_id(pubkey)) {
1.193 djm 684: case EVP_PKEY_RSA:
1.252 djm 685: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
686: fatal("sshkey_new failed");
1.193 djm 687: (*k)->type = KEY_RSA;
688: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
689: break;
690: case EVP_PKEY_DSA:
1.252 djm 691: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
692: fatal("sshkey_new failed");
1.193 djm 693: (*k)->type = KEY_DSA;
694: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
695: break;
1.200 djm 696: case EVP_PKEY_EC:
1.252 djm 697: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
698: fatal("sshkey_new failed");
1.200 djm 699: (*k)->type = KEY_ECDSA;
700: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
1.252 djm 701: (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
1.200 djm 702: break;
1.193 djm 703: default:
1.421 djm 704: fatal_f("unsupported pubkey type %d",
1.321 djm 705: EVP_PKEY_base_id(pubkey));
1.193 djm 706: }
707: EVP_PKEY_free(pubkey);
708: return;
709: }
710:
711: static void
1.252 djm 712: do_convert_from_pem(struct sshkey **k, int *private)
1.193 djm 713: {
714: FILE *fp;
715: RSA *rsa;
716:
717: if ((fp = fopen(identity_file, "r")) == NULL)
718: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
719: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
1.252 djm 720: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
721: fatal("sshkey_new failed");
1.193 djm 722: (*k)->type = KEY_RSA;
723: (*k)->rsa = rsa;
724: fclose(fp);
725: return;
726: }
1.421 djm 727: fatal_f("unrecognised raw private key format");
1.193 djm 728: }
729:
730: static void
731: do_convert_from(struct passwd *pw)
732: {
1.252 djm 733: struct sshkey *k = NULL;
734: int r, private = 0, ok = 0;
1.193 djm 735: struct stat st;
736:
737: if (!have_identity)
738: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 739: if (stat(identity_file, &st) == -1)
1.193 djm 740: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
741:
742: switch (convert_format) {
743: case FMT_RFC4716:
744: do_convert_from_ssh2(pw, &k, &private);
745: break;
746: case FMT_PKCS8:
747: do_convert_from_pkcs8(&k, &private);
748: break;
749: case FMT_PEM:
750: do_convert_from_pem(&k, &private);
751: break;
752: default:
1.421 djm 753: fatal_f("unknown key format %d", convert_format);
1.193 djm 754: }
755:
1.260 djm 756: if (!private) {
1.252 djm 757: if ((r = sshkey_write(k, stdout)) == 0)
758: ok = 1;
1.193 djm 759: if (ok)
760: fprintf(stdout, "\n");
1.260 djm 761: } else {
1.193 djm 762: switch (k->type) {
763: case KEY_DSA:
764: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
765: NULL, 0, NULL, NULL);
766: break;
1.200 djm 767: case KEY_ECDSA:
768: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
769: NULL, 0, NULL, NULL);
770: break;
1.193 djm 771: case KEY_RSA:
772: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
773: NULL, 0, NULL, NULL);
774: break;
775: default:
1.421 djm 776: fatal_f("unsupported key type %s", sshkey_type(k));
1.193 djm 777: }
778: }
779:
1.269 djm 780: if (!ok)
781: fatal("key write failed");
1.252 djm 782: sshkey_free(k);
1.19 markus 783: exit(0);
784: }
1.246 markus 785: #endif
1.19 markus 786:
1.63 itojun 787: static void
1.19 markus 788: do_print_public(struct passwd *pw)
789: {
1.252 djm 790: struct sshkey *prv;
1.19 markus 791: struct stat st;
1.252 djm 792: int r;
1.341 djm 793: char *comment = NULL;
1.19 markus 794:
795: if (!have_identity)
796: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 797: if (stat(identity_file, &st) == -1)
1.269 djm 798: fatal("%s: %s", identity_file, strerror(errno));
1.341 djm 799: prv = load_identity(identity_file, &comment);
1.252 djm 800: if ((r = sshkey_write(prv, stdout)) != 0)
1.421 djm 801: fatal_fr(r, "write key");
1.341 djm 802: if (comment != NULL && *comment != '\0')
803: fprintf(stdout, " %s", comment);
1.19 markus 804: fprintf(stdout, "\n");
1.419 djm 805: if (sshkey_is_sk(prv)) {
806: debug("sk_application: \"%s\", sk_flags 0x%02x",
807: prv->sk_application, prv->sk_flags);
808: }
809: sshkey_free(prv);
1.341 djm 810: free(comment);
1.19 markus 811: exit(0);
812: }
813:
1.66 markus 814: static void
1.197 djm 815: do_download(struct passwd *pw)
1.75 markus 816: {
1.177 markus 817: #ifdef ENABLE_PKCS11
1.252 djm 818: struct sshkey **keys = NULL;
1.177 markus 819: int i, nkeys;
1.252 djm 820: enum sshkey_fp_rep rep;
1.251 djm 821: int fptype;
1.392 djm 822: char *fp, *ra, **comments = NULL;
1.222 djm 823:
1.251 djm 824: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
825: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.75 markus 826:
1.327 benno 827: pkcs11_init(1);
1.392 djm 828: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys, &comments);
1.177 markus 829: if (nkeys <= 0)
830: fatal("cannot read public key from pkcs11");
831: for (i = 0; i < nkeys; i++) {
1.221 djm 832: if (print_fingerprint) {
1.252 djm 833: fp = sshkey_fingerprint(keys[i], fptype, rep);
834: ra = sshkey_fingerprint(keys[i], fingerprint_hash,
1.221 djm 835: SSH_FP_RANDOMART);
1.259 djm 836: if (fp == NULL || ra == NULL)
1.421 djm 837: fatal_f("sshkey_fingerprint fail");
1.252 djm 838: printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
839: fp, sshkey_type(keys[i]));
1.325 djm 840: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.221 djm 841: printf("%s\n", ra);
1.227 djm 842: free(ra);
843: free(fp);
1.221 djm 844: } else {
1.252 djm 845: (void) sshkey_write(keys[i], stdout); /* XXX check */
1.392 djm 846: fprintf(stdout, "%s%s\n",
847: *(comments[i]) == '\0' ? "" : " ", comments[i]);
1.221 djm 848: }
1.392 djm 849: free(comments[i]);
1.252 djm 850: sshkey_free(keys[i]);
1.97 markus 851: }
1.392 djm 852: free(comments);
1.227 djm 853: free(keys);
1.177 markus 854: pkcs11_terminate();
1.75 markus 855: exit(0);
1.177 markus 856: #else
857: fatal("no pkcs11 support");
858: #endif /* ENABLE_PKCS11 */
1.75 markus 859: }
1.66 markus 860:
1.279 djm 861: static struct sshkey *
862: try_read_key(char **cpp)
863: {
864: struct sshkey *ret;
865: int r;
866:
867: if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
868: fatal("sshkey_new failed");
869: if ((r = sshkey_read(ret, cpp)) == 0)
870: return ret;
871: /* Not a key */
872: sshkey_free(ret);
873: return NULL;
874: }
875:
1.63 itojun 876: static void
1.279 djm 877: fingerprint_one_key(const struct sshkey *public, const char *comment)
1.8 markus 878: {
1.279 djm 879: char *fp = NULL, *ra = NULL;
1.252 djm 880: enum sshkey_fp_rep rep;
1.251 djm 881: int fptype;
1.12 markus 882:
1.251 djm 883: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
884: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.279 djm 885: fp = sshkey_fingerprint(public, fptype, rep);
886: ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
887: if (fp == NULL || ra == NULL)
1.421 djm 888: fatal_f("sshkey_fingerprint failed");
1.294 djm 889: mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
1.279 djm 890: comment ? comment : "no comment", sshkey_type(public));
1.325 djm 891: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.279 djm 892: printf("%s\n", ra);
893: free(ra);
894: free(fp);
895: }
896:
897: static void
898: fingerprint_private(const char *path)
899: {
900: struct stat st;
901: char *comment = NULL;
1.407 djm 902: struct sshkey *privkey = NULL, *pubkey = NULL;
1.279 djm 903: int r;
904:
1.333 deraadt 905: if (stat(identity_file, &st) == -1)
1.279 djm 906: fatal("%s: %s", path, strerror(errno));
1.407 djm 907: if ((r = sshkey_load_public(path, &pubkey, &comment)) != 0)
1.421 djm 908: debug_r(r, "load public \"%s\"", path);
1.407 djm 909: if (pubkey == NULL || comment == NULL || *comment == '\0') {
910: free(comment);
911: if ((r = sshkey_load_private(path, NULL,
912: &privkey, &comment)) != 0)
1.421 djm 913: debug_r(r, "load private \"%s\"", path);
1.407 djm 914: }
915: if (pubkey == NULL && privkey == NULL)
916: fatal("%s is not a key file.", path);
917:
918: fingerprint_one_key(pubkey == NULL ? privkey : pubkey, comment);
919: sshkey_free(pubkey);
920: sshkey_free(privkey);
1.279 djm 921: free(comment);
922: }
923:
924: static void
925: do_fingerprint(struct passwd *pw)
926: {
927: FILE *f;
928: struct sshkey *public = NULL;
1.317 markus 929: char *comment = NULL, *cp, *ep, *line = NULL;
930: size_t linesize = 0;
1.279 djm 931: int i, invalid = 1;
932: const char *path;
1.289 djm 933: u_long lnum = 0;
1.279 djm 934:
1.12 markus 935: if (!have_identity)
936: ask_filename(pw, "Enter file in which the key is");
1.279 djm 937: path = identity_file;
1.15 markus 938:
1.279 djm 939: if (strcmp(identity_file, "-") == 0) {
940: f = stdin;
941: path = "(stdin)";
942: } else if ((f = fopen(path, "r")) == NULL)
943: fatal("%s: %s: %s", __progname, path, strerror(errno));
944:
1.317 markus 945: while (getline(&line, &linesize, f) != -1) {
946: lnum++;
1.279 djm 947: cp = line;
948: cp[strcspn(cp, "\n")] = '\0';
949: /* Trim leading space and comments */
950: cp = line + strspn(line, " \t");
951: if (*cp == '#' || *cp == '\0')
952: continue;
1.191 djm 953:
1.279 djm 954: /*
955: * Input may be plain keys, private keys, authorized_keys
956: * or known_hosts.
957: */
958:
959: /*
960: * Try private keys first. Assume a key is private if
961: * "SSH PRIVATE KEY" appears on the first line and we're
962: * not reading from stdin (XXX support private keys on stdin).
963: */
964: if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
1.280 djm 965: strstr(cp, "PRIVATE KEY") != NULL) {
1.317 markus 966: free(line);
1.279 djm 967: fclose(f);
968: fingerprint_private(path);
969: exit(0);
970: }
971:
972: /*
973: * If it's not a private key, then this must be prepared to
974: * accept a public key prefixed with a hostname or options.
975: * Try a bare key first, otherwise skip the leading stuff.
976: */
977: if ((public = try_read_key(&cp)) == NULL) {
978: i = strtol(cp, &ep, 10);
979: if (i == 0 || ep == NULL ||
980: (*ep != ' ' && *ep != '\t')) {
981: int quoted = 0;
982:
983: comment = cp;
984: for (; *cp && (quoted || (*cp != ' ' &&
985: *cp != '\t')); cp++) {
986: if (*cp == '\\' && cp[1] == '"')
987: cp++; /* Skip both */
988: else if (*cp == '"')
989: quoted = !quoted;
990: }
991: if (!*cp)
992: continue;
993: *cp++ = '\0';
994: }
1.191 djm 995: }
1.279 djm 996: /* Retry after parsing leading hostname/key options */
997: if (public == NULL && (public = try_read_key(&cp)) == NULL) {
1.289 djm 998: debug("%s:%lu: not a public key", path, lnum);
1.191 djm 999: continue;
1000: }
1001:
1.279 djm 1002: /* Find trailing comment, if any */
1003: for (; *cp == ' ' || *cp == '\t'; cp++)
1.191 djm 1004: ;
1.279 djm 1005: if (*cp != '\0' && *cp != '#')
1.191 djm 1006: comment = cp;
1.279 djm 1007:
1008: fingerprint_one_key(public, comment);
1.252 djm 1009: sshkey_free(public);
1.279 djm 1010: invalid = 0; /* One good key in the file is sufficient */
1.15 markus 1011: }
1.191 djm 1012: fclose(f);
1.317 markus 1013: free(line);
1.191 djm 1014:
1.269 djm 1015: if (invalid)
1.279 djm 1016: fatal("%s is not a public key file.", path);
1.12 markus 1017: exit(0);
1.8 markus 1018: }
1019:
1.119 djm 1020: static void
1.206 stevesk 1021: do_gen_all_hostkeys(struct passwd *pw)
1022: {
1023: struct {
1024: char *key_type;
1025: char *key_type_display;
1026: char *path;
1027: } key_types[] = {
1.267 djm 1028: #ifdef WITH_OPENSSL
1.206 stevesk 1029: { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
1030: { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
1.267 djm 1031: #endif /* WITH_OPENSSL */
1.238 markus 1032: { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
1.313 markus 1033: #ifdef WITH_XMSS
1034: { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
1035: #endif /* WITH_XMSS */
1.206 stevesk 1036: { NULL, NULL, NULL }
1037: };
1038:
1.340 dtucker 1039: u_int32_t bits = 0;
1.206 stevesk 1040: int first = 0;
1041: struct stat st;
1.252 djm 1042: struct sshkey *private, *public;
1.307 djm 1043: char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
1.252 djm 1044: int i, type, fd, r;
1.206 stevesk 1045:
1046: for (i = 0; key_types[i].key_type; i++) {
1.307 djm 1047: public = private = NULL;
1048: prv_tmp = pub_tmp = prv_file = pub_file = NULL;
1049:
1050: xasprintf(&prv_file, "%s%s",
1051: identity_file, key_types[i].path);
1052:
1053: /* Check whether private key exists and is not zero-length */
1054: if (stat(prv_file, &st) == 0) {
1055: if (st.st_size != 0)
1056: goto next;
1057: } else if (errno != ENOENT) {
1.269 djm 1058: error("Could not stat %s: %s", key_types[i].path,
1.206 stevesk 1059: strerror(errno));
1.307 djm 1060: goto failnext;
1.206 stevesk 1061: }
1062:
1.307 djm 1063: /*
1064: * Private key doesn't exist or is invalid; proceed with
1065: * key generation.
1066: */
1067: xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
1068: identity_file, key_types[i].path);
1069: xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
1070: identity_file, key_types[i].path);
1071: xasprintf(&pub_file, "%s%s.pub",
1072: identity_file, key_types[i].path);
1073:
1.206 stevesk 1074: if (first == 0) {
1075: first = 1;
1076: printf("%s: generating new host keys: ", __progname);
1077: }
1078: printf("%s ", key_types[i].key_type_display);
1079: fflush(stdout);
1.252 djm 1080: type = sshkey_type_from_name(key_types[i].key_type);
1.307 djm 1081: if ((fd = mkstemp(prv_tmp)) == -1) {
1.409 djm 1082: error("Could not save your private key in %s: %s",
1.307 djm 1083: prv_tmp, strerror(errno));
1084: goto failnext;
1085: }
1.409 djm 1086: (void)close(fd); /* just using mkstemp() to reserve a name */
1.206 stevesk 1087: bits = 0;
1.255 djm 1088: type_bits_valid(type, NULL, &bits);
1.252 djm 1089: if ((r = sshkey_generate(type, bits, &private)) != 0) {
1.421 djm 1090: error_r(r, "sshkey_generate failed");
1.307 djm 1091: goto failnext;
1.206 stevesk 1092: }
1.252 djm 1093: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1094: fatal_fr(r, "sshkey_from_private");
1.206 stevesk 1095: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1096: hostname);
1.307 djm 1097: if ((r = sshkey_save_private(private, prv_tmp, "",
1.336 djm 1098: comment, private_key_format, openssh_format_cipher,
1099: rounds)) != 0) {
1.421 djm 1100: error_r(r, "Saving key \"%s\" failed", prv_tmp);
1.307 djm 1101: goto failnext;
1.206 stevesk 1102: }
1.307 djm 1103: if ((fd = mkstemp(pub_tmp)) == -1) {
1104: error("Could not save your public key in %s: %s",
1105: pub_tmp, strerror(errno));
1106: goto failnext;
1.206 stevesk 1107: }
1.307 djm 1108: (void)fchmod(fd, 0644);
1.409 djm 1109: (void)close(fd);
1110: if ((r = sshkey_save_public(public, pub_tmp, comment)) != 0) {
1.421 djm 1111: error_r(r, "Unable to save public key to %s",
1112: identity_file);
1.307 djm 1113: goto failnext;
1114: }
1115:
1116: /* Rename temporary files to their permanent locations. */
1117: if (rename(pub_tmp, pub_file) != 0) {
1118: error("Unable to move %s into position: %s",
1119: pub_file, strerror(errno));
1120: goto failnext;
1121: }
1122: if (rename(prv_tmp, prv_file) != 0) {
1123: error("Unable to move %s into position: %s",
1124: key_types[i].path, strerror(errno));
1125: failnext:
1.206 stevesk 1126: first = 0;
1.307 djm 1127: goto next;
1.206 stevesk 1128: }
1.307 djm 1129: next:
1130: sshkey_free(private);
1.252 djm 1131: sshkey_free(public);
1.307 djm 1132: free(prv_tmp);
1133: free(pub_tmp);
1134: free(prv_file);
1135: free(pub_file);
1.206 stevesk 1136: }
1137: if (first != 0)
1138: printf("\n");
1139: }
1140:
1.256 djm 1141: struct known_hosts_ctx {
1.257 djm 1142: const char *host; /* Hostname searched for in find/delete case */
1143: FILE *out; /* Output file, stdout for find_hosts case */
1144: int has_unhashed; /* When hashing, original had unhashed hosts */
1145: int found_key; /* For find/delete, host was found */
1146: int invalid; /* File contained invalid items; don't delete */
1.325 djm 1147: int hash_hosts; /* Hash hostnames as we go */
1148: int find_host; /* Search for specific hostname */
1149: int delete_host; /* Delete host from known_hosts */
1.256 djm 1150: };
1151:
1152: static int
1153: known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1.119 djm 1154: {
1.256 djm 1155: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1156: char *hashed, *cp, *hosts, *ohosts;
1157: int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1.298 dtucker 1158: int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1.256 djm 1159:
1.262 djm 1160: switch (l->status) {
1161: case HKF_STATUS_OK:
1162: case HKF_STATUS_MATCHED:
1163: /*
1164: * Don't hash hosts already already hashed, with wildcard
1165: * characters or a CA/revocation marker.
1166: */
1.296 djm 1167: if (was_hashed || has_wild || l->marker != MRK_NONE) {
1.262 djm 1168: fprintf(ctx->out, "%s\n", l->line);
1.325 djm 1169: if (has_wild && !ctx->find_host) {
1.297 dtucker 1170: logit("%s:%lu: ignoring host name "
1.269 djm 1171: "with wildcard: %.64s", l->path,
1.262 djm 1172: l->linenum, l->hosts);
1173: }
1174: return 0;
1175: }
1176: /*
1177: * Split any comma-separated hostnames from the host list,
1178: * hash and store separately.
1179: */
1180: ohosts = hosts = xstrdup(l->hosts);
1181: while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1.299 djm 1182: lowercase(cp);
1.262 djm 1183: if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1184: fatal("hash_host failed");
1185: fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1.438 dtucker 1186: free(hashed);
1.262 djm 1187: ctx->has_unhashed = 1;
1188: }
1189: free(ohosts);
1190: return 0;
1191: case HKF_STATUS_INVALID:
1192: /* Retain invalid lines, but mark file as invalid. */
1.256 djm 1193: ctx->invalid = 1;
1.297 dtucker 1194: logit("%s:%lu: invalid line", l->path, l->linenum);
1.262 djm 1195: /* FALLTHROUGH */
1196: default:
1.256 djm 1197: fprintf(ctx->out, "%s\n", l->line);
1198: return 0;
1199: }
1.262 djm 1200: /* NOTREACHED */
1201: return -1;
1.256 djm 1202: }
1203:
1204: static int
1205: known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1206: {
1207: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1.272 djm 1208: enum sshkey_fp_rep rep;
1209: int fptype;
1.338 djm 1210: char *fp = NULL, *ra = NULL;
1.272 djm 1211:
1212: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1213: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.256 djm 1214:
1.262 djm 1215: if (l->status == HKF_STATUS_MATCHED) {
1.325 djm 1216: if (ctx->delete_host) {
1.256 djm 1217: if (l->marker != MRK_NONE) {
1218: /* Don't remove CA and revocation lines */
1219: fprintf(ctx->out, "%s\n", l->line);
1220: } else {
1221: /*
1222: * Hostname matches and has no CA/revoke
1223: * marker, delete it by *not* writing the
1224: * line to ctx->out.
1225: */
1226: ctx->found_key = 1;
1227: if (!quiet)
1.297 dtucker 1228: printf("# Host %s found: line %lu\n",
1.256 djm 1229: ctx->host, l->linenum);
1230: }
1231: return 0;
1.325 djm 1232: } else if (ctx->find_host) {
1.256 djm 1233: ctx->found_key = 1;
1234: if (!quiet) {
1.297 dtucker 1235: printf("# Host %s found: line %lu %s\n",
1.256 djm 1236: ctx->host,
1237: l->linenum, l->marker == MRK_CA ? "CA" :
1238: (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1239: }
1.325 djm 1240: if (ctx->hash_hosts)
1.256 djm 1241: known_hosts_hash(l, ctx);
1.272 djm 1242: else if (print_fingerprint) {
1243: fp = sshkey_fingerprint(l->key, fptype, rep);
1.338 djm 1244: ra = sshkey_fingerprint(l->key,
1245: fingerprint_hash, SSH_FP_RANDOMART);
1246: if (fp == NULL || ra == NULL)
1.421 djm 1247: fatal_f("sshkey_fingerprint failed");
1.385 claudio 1248: mprintf("%s %s %s%s%s\n", ctx->host,
1249: sshkey_type(l->key), fp,
1250: l->comment[0] ? " " : "",
1251: l->comment);
1.338 djm 1252: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1253: printf("%s\n", ra);
1254: free(ra);
1.272 djm 1255: free(fp);
1256: } else
1.256 djm 1257: fprintf(ctx->out, "%s\n", l->line);
1258: return 0;
1259: }
1.325 djm 1260: } else if (ctx->delete_host) {
1.256 djm 1261: /* Retain non-matching hosts when deleting */
1262: if (l->status == HKF_STATUS_INVALID) {
1263: ctx->invalid = 1;
1.297 dtucker 1264: logit("%s:%lu: invalid line", l->path, l->linenum);
1.256 djm 1265: }
1266: fprintf(ctx->out, "%s\n", l->line);
1.166 djm 1267: }
1.256 djm 1268: return 0;
1.119 djm 1269: }
1270:
1271: static void
1.325 djm 1272: do_known_hosts(struct passwd *pw, const char *name, int find_host,
1273: int delete_host, int hash_hosts)
1.119 djm 1274: {
1.258 deraadt 1275: char *cp, tmp[PATH_MAX], old[PATH_MAX];
1.257 djm 1276: int r, fd, oerrno, inplace = 0;
1.256 djm 1277: struct known_hosts_ctx ctx;
1.272 djm 1278: u_int foreach_options;
1.410 djm 1279: struct stat sb;
1.119 djm 1280:
1281: if (!have_identity) {
1282: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1283: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1284: sizeof(identity_file))
1285: fatal("Specified known hosts path too long");
1.227 djm 1286: free(cp);
1.119 djm 1287: have_identity = 1;
1288: }
1.410 djm 1289: if (stat(identity_file, &sb) != 0)
1290: fatal("Cannot stat %s: %s", identity_file, strerror(errno));
1.119 djm 1291:
1.256 djm 1292: memset(&ctx, 0, sizeof(ctx));
1293: ctx.out = stdout;
1294: ctx.host = name;
1.325 djm 1295: ctx.hash_hosts = hash_hosts;
1296: ctx.find_host = find_host;
1297: ctx.delete_host = delete_host;
1.256 djm 1298:
1.119 djm 1299: /*
1300: * Find hosts goes to stdout, hash and deletions happen in-place
1301: * A corner case is ssh-keygen -HF foo, which should go to stdout
1302: */
1303: if (!find_host && (hash_hosts || delete_host)) {
1304: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1305: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1306: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1307: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1308: fatal("known_hosts path too long");
1309: umask(077);
1.256 djm 1310: if ((fd = mkstemp(tmp)) == -1)
1.119 djm 1311: fatal("mkstemp: %s", strerror(errno));
1.256 djm 1312: if ((ctx.out = fdopen(fd, "w")) == NULL) {
1313: oerrno = errno;
1.119 djm 1314: unlink(tmp);
1.256 djm 1315: fatal("fdopen: %s", strerror(oerrno));
1.119 djm 1316: }
1.463 dtucker 1317: (void)fchmod(fd, sb.st_mode & 0644);
1.257 djm 1318: inplace = 1;
1.119 djm 1319: }
1.256 djm 1320: /* XXX support identity_file == "-" for stdin */
1.272 djm 1321: foreach_options = find_host ? HKF_WANT_MATCH : 0;
1322: foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1.316 djm 1323: if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
1.315 djm 1324: known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
1.427 djm 1325: foreach_options, 0)) != 0) {
1.284 deraadt 1326: if (inplace)
1327: unlink(tmp);
1.421 djm 1328: fatal_fr(r, "hostkeys_foreach");
1.284 deraadt 1329: }
1.119 djm 1330:
1.257 djm 1331: if (inplace)
1.256 djm 1332: fclose(ctx.out);
1.119 djm 1333:
1.256 djm 1334: if (ctx.invalid) {
1.269 djm 1335: error("%s is not a valid known_hosts file.", identity_file);
1.257 djm 1336: if (inplace) {
1.269 djm 1337: error("Not replacing existing known_hosts "
1338: "file because of errors");
1.119 djm 1339: unlink(tmp);
1340: }
1341: exit(1);
1.256 djm 1342: } else if (delete_host && !ctx.found_key) {
1.269 djm 1343: logit("Host %s not found in %s", name, identity_file);
1.277 djm 1344: if (inplace)
1345: unlink(tmp);
1.257 djm 1346: } else if (inplace) {
1.119 djm 1347: /* Backup existing file */
1348: if (unlink(old) == -1 && errno != ENOENT)
1349: fatal("unlink %.100s: %s", old, strerror(errno));
1350: if (link(identity_file, old) == -1)
1351: fatal("link %.100s to %.100s: %s", identity_file, old,
1352: strerror(errno));
1353: /* Move new one into place */
1354: if (rename(tmp, identity_file) == -1) {
1355: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1356: strerror(errno));
1357: unlink(tmp);
1358: unlink(old);
1359: exit(1);
1360: }
1361:
1.269 djm 1362: printf("%s updated.\n", identity_file);
1363: printf("Original contents retained as %s\n", old);
1.256 djm 1364: if (ctx.has_unhashed) {
1.269 djm 1365: logit("WARNING: %s contains unhashed entries", old);
1366: logit("Delete this file to ensure privacy "
1367: "of hostnames");
1.119 djm 1368: }
1369: }
1370:
1.256 djm 1371: exit (find_host && !ctx.found_key);
1.119 djm 1372: }
1373:
1.13 deraadt 1374: /*
1375: * Perform changing a passphrase. The argument is the passwd structure
1376: * for the current user.
1377: */
1.63 itojun 1378: static void
1.7 markus 1379: do_change_passphrase(struct passwd *pw)
1380: {
1.12 markus 1381: char *comment;
1382: char *old_passphrase, *passphrase1, *passphrase2;
1383: struct stat st;
1.252 djm 1384: struct sshkey *private;
1385: int r;
1.12 markus 1386:
1387: if (!have_identity)
1388: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1389: if (stat(identity_file, &st) == -1)
1.269 djm 1390: fatal("%s: %s", identity_file, strerror(errno));
1.12 markus 1391: /* Try to load the file with empty passphrase. */
1.252 djm 1392: r = sshkey_load_private(identity_file, "", &private, &comment);
1393: if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.12 markus 1394: if (identity_passphrase)
1395: old_passphrase = xstrdup(identity_passphrase);
1396: else
1.65 markus 1397: old_passphrase =
1398: read_passphrase("Enter old passphrase: ",
1399: RP_ALLOW_STDIN);
1.252 djm 1400: r = sshkey_load_private(identity_file, old_passphrase,
1401: &private, &comment);
1.399 jsg 1402: freezero(old_passphrase, strlen(old_passphrase));
1.252 djm 1403: if (r != 0)
1404: goto badkey;
1405: } else if (r != 0) {
1406: badkey:
1.421 djm 1407: fatal_r(r, "Failed to load key %s", identity_file);
1.12 markus 1408: }
1.266 djm 1409: if (comment)
1.294 djm 1410: mprintf("Key has comment '%s'\n", comment);
1.12 markus 1411:
1412: /* Ask the new passphrase (twice). */
1413: if (identity_new_passphrase) {
1414: passphrase1 = xstrdup(identity_new_passphrase);
1415: passphrase2 = NULL;
1416: } else {
1417: passphrase1 =
1.65 markus 1418: read_passphrase("Enter new passphrase (empty for no "
1419: "passphrase): ", RP_ALLOW_STDIN);
1420: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1421: RP_ALLOW_STDIN);
1.12 markus 1422:
1423: /* Verify that they are the same. */
1424: if (strcmp(passphrase1, passphrase2) != 0) {
1.240 djm 1425: explicit_bzero(passphrase1, strlen(passphrase1));
1426: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1427: free(passphrase1);
1428: free(passphrase2);
1.12 markus 1429: printf("Pass phrases do not match. Try again.\n");
1430: exit(1);
1431: }
1432: /* Destroy the other copy. */
1.399 jsg 1433: freezero(passphrase2, strlen(passphrase2));
1.12 markus 1434: }
1435:
1436: /* Save the file using the new passphrase. */
1.252 djm 1437: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 1438: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 1439: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1440: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1441: sshkey_free(private);
1.227 djm 1442: free(comment);
1.12 markus 1443: exit(1);
1444: }
1445: /* Destroy the passphrase and the copy of the key in memory. */
1.399 jsg 1446: freezero(passphrase1, strlen(passphrase1));
1.252 djm 1447: sshkey_free(private); /* Destroys contents */
1.227 djm 1448: free(comment);
1.1 deraadt 1449:
1.12 markus 1450: printf("Your identification has been saved with the new passphrase.\n");
1451: exit(0);
1.1 deraadt 1452: }
1453:
1.105 jakob 1454: /*
1455: * Print the SSHFP RR.
1456: */
1.138 jakob 1457: static int
1.325 djm 1458: do_print_resource_record(struct passwd *pw, char *fname, char *hname,
1.462 djm 1459: int print_generic, char * const *opts, size_t nopts)
1.105 jakob 1460: {
1.252 djm 1461: struct sshkey *public;
1.105 jakob 1462: char *comment = NULL;
1463: struct stat st;
1.462 djm 1464: int r, hash = -1;
1465: size_t i;
1.105 jakob 1466:
1.462 djm 1467: for (i = 0; i < nopts; i++) {
1468: if (strncasecmp(opts[i], "hashalg=", 8) == 0) {
1469: if ((hash = ssh_digest_alg_by_name(opts[i] + 8)) == -1)
1470: fatal("Unsupported hash algorithm");
1471: } else {
1472: error("Invalid option \"%s\"", opts[i]);
1473: return SSH_ERR_INVALID_ARGUMENT;
1474: }
1475: }
1.138 jakob 1476: if (fname == NULL)
1.421 djm 1477: fatal_f("no filename");
1.333 deraadt 1478: if (stat(fname, &st) == -1) {
1.138 jakob 1479: if (errno == ENOENT)
1480: return 0;
1.269 djm 1481: fatal("%s: %s", fname, strerror(errno));
1.105 jakob 1482: }
1.269 djm 1483: if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1.421 djm 1484: fatal_r(r, "Failed to read v2 public key from \"%s\"", fname);
1.462 djm 1485: export_dns_rr(hname, public, stdout, print_generic, hash);
1.252 djm 1486: sshkey_free(public);
1487: free(comment);
1488: return 1;
1.105 jakob 1489: }
1490:
1.13 deraadt 1491: /*
1492: * Change the comment of a private key file.
1493: */
1.63 itojun 1494: static void
1.325 djm 1495: do_change_comment(struct passwd *pw, const char *identity_comment)
1.1 deraadt 1496: {
1.46 deraadt 1497: char new_comment[1024], *comment, *passphrase;
1.252 djm 1498: struct sshkey *private;
1499: struct sshkey *public;
1.12 markus 1500: struct stat st;
1.409 djm 1501: int r;
1.12 markus 1502:
1503: if (!have_identity)
1504: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1505: if (stat(identity_file, &st) == -1)
1.269 djm 1506: fatal("%s: %s", identity_file, strerror(errno));
1.252 djm 1507: if ((r = sshkey_load_private(identity_file, "",
1508: &private, &comment)) == 0)
1509: passphrase = xstrdup("");
1.269 djm 1510: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 1511: fatal_r(r, "Cannot load private key \"%s\"", identity_file);
1.269 djm 1512: else {
1.12 markus 1513: if (identity_passphrase)
1514: passphrase = xstrdup(identity_passphrase);
1515: else if (identity_new_passphrase)
1516: passphrase = xstrdup(identity_new_passphrase);
1517: else
1.65 markus 1518: passphrase = read_passphrase("Enter passphrase: ",
1519: RP_ALLOW_STDIN);
1.12 markus 1520: /* Try to load using the passphrase. */
1.252 djm 1521: if ((r = sshkey_load_private(identity_file, passphrase,
1522: &private, &comment)) != 0) {
1.399 jsg 1523: freezero(passphrase, strlen(passphrase));
1.421 djm 1524: fatal_r(r, "Cannot load private key \"%s\"",
1525: identity_file);
1.12 markus 1526: }
1527: }
1.283 halex 1528:
1.313 markus 1529: if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
1.336 djm 1530: private_key_format != SSHKEY_PRIVATE_OPENSSH) {
1.302 djm 1531: error("Comments are only supported for keys stored in "
1.283 halex 1532: "the new format (-o).");
1.268 tobias 1533: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1534: sshkey_free(private);
1.52 markus 1535: exit(1);
1.86 deraadt 1536: }
1.293 millert 1537: if (comment)
1.330 lum 1538: printf("Old comment: %s\n", comment);
1.293 millert 1539: else
1.330 lum 1540: printf("No existing comment\n");
1.12 markus 1541:
1542: if (identity_comment) {
1543: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1544: } else {
1.330 lum 1545: printf("New comment: ");
1.12 markus 1546: fflush(stdout);
1547: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1.240 djm 1548: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1549: sshkey_free(private);
1.12 markus 1550: exit(1);
1551: }
1.162 gilles 1552: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1553: }
1.330 lum 1554: if (comment != NULL && strcmp(comment, new_comment) == 0) {
1555: printf("No change to comment\n");
1556: free(passphrase);
1557: sshkey_free(private);
1558: free(comment);
1559: exit(0);
1560: }
1.12 markus 1561:
1562: /* Save the file using the new passphrase. */
1.252 djm 1563: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 1564: new_comment, private_key_format, openssh_format_cipher,
1565: rounds)) != 0) {
1.421 djm 1566: error_r(r, "Saving key \"%s\" failed", identity_file);
1.399 jsg 1567: freezero(passphrase, strlen(passphrase));
1.252 djm 1568: sshkey_free(private);
1.227 djm 1569: free(comment);
1.12 markus 1570: exit(1);
1571: }
1.399 jsg 1572: freezero(passphrase, strlen(passphrase));
1.252 djm 1573: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 1574: fatal_fr(r, "sshkey_from_private");
1.252 djm 1575: sshkey_free(private);
1.12 markus 1576:
1577: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 1578: if ((r = sshkey_save_public(public, identity_file, new_comment)) != 0)
1579: fatal_r(r, "Unable to save public key to %s", identity_file);
1.252 djm 1580: sshkey_free(public);
1.227 djm 1581: free(comment);
1.1 deraadt 1582:
1.330 lum 1583: if (strlen(new_comment) > 0)
1584: printf("Comment '%s' applied\n", new_comment);
1585: else
1586: printf("Comment removed\n");
1587:
1.12 markus 1588: exit(0);
1.1 deraadt 1589: }
1590:
1.179 djm 1591: static void
1.415 djm 1592: cert_ext_add(const char *key, const char *value, int iscrit)
1.179 djm 1593: {
1.415 djm 1594: cert_ext = xreallocarray(cert_ext, ncert_ext + 1, sizeof(*cert_ext));
1595: cert_ext[ncert_ext].key = xstrdup(key);
1596: cert_ext[ncert_ext].val = value == NULL ? NULL : xstrdup(value);
1597: cert_ext[ncert_ext].crit = iscrit;
1598: ncert_ext++;
1.179 djm 1599: }
1600:
1.415 djm 1601: /* qsort(3) comparison function for certificate extensions */
1602: static int
1603: cert_ext_cmp(const void *_a, const void *_b)
1.179 djm 1604: {
1.415 djm 1605: const struct cert_ext *a = (const struct cert_ext *)_a;
1606: const struct cert_ext *b = (const struct cert_ext *)_b;
1.252 djm 1607: int r;
1.179 djm 1608:
1.415 djm 1609: if (a->crit != b->crit)
1610: return (a->crit < b->crit) ? -1 : 1;
1611: if ((r = strcmp(a->key, b->key)) != 0)
1612: return r;
1613: if ((a->val == NULL) != (b->val == NULL))
1614: return (a->val == NULL) ? -1 : 1;
1615: if (a->val != NULL && (r = strcmp(a->val, b->val)) != 0)
1616: return r;
1617: return 0;
1.179 djm 1618: }
1619:
1.190 djm 1620: #define OPTIONS_CRITICAL 1
1621: #define OPTIONS_EXTENSIONS 2
1.179 djm 1622: static void
1.252 djm 1623: prepare_options_buf(struct sshbuf *c, int which)
1.179 djm 1624: {
1.415 djm 1625: struct sshbuf *b;
1.300 djm 1626: size_t i;
1.415 djm 1627: int r;
1628: const struct cert_ext *ext;
1.300 djm 1629:
1.415 djm 1630: if ((b = sshbuf_new()) == NULL)
1.421 djm 1631: fatal_f("sshbuf_new failed");
1.252 djm 1632: sshbuf_reset(c);
1.415 djm 1633: for (i = 0; i < ncert_ext; i++) {
1634: ext = &cert_ext[i];
1635: if ((ext->crit && (which & OPTIONS_EXTENSIONS)) ||
1636: (!ext->crit && (which & OPTIONS_CRITICAL)))
1.300 djm 1637: continue;
1.415 djm 1638: if (ext->val == NULL) {
1639: /* flag option */
1.421 djm 1640: debug3_f("%s", ext->key);
1.415 djm 1641: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1642: (r = sshbuf_put_string(c, NULL, 0)) != 0)
1.421 djm 1643: fatal_fr(r, "prepare flag");
1.415 djm 1644: } else {
1645: /* key/value option */
1.421 djm 1646: debug3_f("%s=%s", ext->key, ext->val);
1.415 djm 1647: sshbuf_reset(b);
1648: if ((r = sshbuf_put_cstring(c, ext->key)) != 0 ||
1649: (r = sshbuf_put_cstring(b, ext->val)) != 0 ||
1650: (r = sshbuf_put_stringb(c, b)) != 0)
1.421 djm 1651: fatal_fr(r, "prepare k/v");
1.300 djm 1652: }
1653: }
1.415 djm 1654: sshbuf_free(b);
1655: }
1656:
1657: static void
1658: finalise_cert_exts(void)
1659: {
1660: /* critical options */
1661: if (certflags_command != NULL)
1662: cert_ext_add("force-command", certflags_command, 1);
1663: if (certflags_src_addr != NULL)
1664: cert_ext_add("source-address", certflags_src_addr, 1);
1.453 naddy 1665: if ((certflags_flags & CERTOPT_REQUIRE_VERIFY) != 0)
1666: cert_ext_add("verify-required", NULL, 1);
1.415 djm 1667: /* extensions */
1668: if ((certflags_flags & CERTOPT_X_FWD) != 0)
1669: cert_ext_add("permit-X11-forwarding", NULL, 0);
1670: if ((certflags_flags & CERTOPT_AGENT_FWD) != 0)
1671: cert_ext_add("permit-agent-forwarding", NULL, 0);
1672: if ((certflags_flags & CERTOPT_PORT_FWD) != 0)
1673: cert_ext_add("permit-port-forwarding", NULL, 0);
1674: if ((certflags_flags & CERTOPT_PTY) != 0)
1675: cert_ext_add("permit-pty", NULL, 0);
1676: if ((certflags_flags & CERTOPT_USER_RC) != 0)
1677: cert_ext_add("permit-user-rc", NULL, 0);
1678: if ((certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
1679: cert_ext_add("no-touch-required", NULL, 0);
1680: /* order lexically by key */
1681: if (ncert_ext > 0)
1682: qsort(cert_ext, ncert_ext, sizeof(*cert_ext), cert_ext_cmp);
1.179 djm 1683: }
1684:
1.252 djm 1685: static struct sshkey *
1.197 djm 1686: load_pkcs11_key(char *path)
1687: {
1688: #ifdef ENABLE_PKCS11
1.252 djm 1689: struct sshkey **keys = NULL, *public, *private = NULL;
1690: int r, i, nkeys;
1.197 djm 1691:
1.252 djm 1692: if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1.421 djm 1693: fatal_r(r, "Couldn't load CA public key \"%s\"", path);
1.197 djm 1694:
1.392 djm 1695: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase,
1696: &keys, NULL);
1.421 djm 1697: debug3_f("%d keys", nkeys);
1.197 djm 1698: if (nkeys <= 0)
1699: fatal("cannot read public key from pkcs11");
1700: for (i = 0; i < nkeys; i++) {
1.252 djm 1701: if (sshkey_equal_public(public, keys[i])) {
1.197 djm 1702: private = keys[i];
1703: continue;
1704: }
1.252 djm 1705: sshkey_free(keys[i]);
1.197 djm 1706: }
1.227 djm 1707: free(keys);
1.252 djm 1708: sshkey_free(public);
1.197 djm 1709: return private;
1710: #else
1711: fatal("no pkcs11 support");
1712: #endif /* ENABLE_PKCS11 */
1713: }
1714:
1.305 djm 1715: /* Signer for sshkey_certify_custom that uses the agent */
1716: static int
1.332 djm 1717: agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
1.305 djm 1718: const u_char *data, size_t datalen,
1.416 djm 1719: const char *alg, const char *provider, const char *pin,
1720: u_int compat, void *ctx)
1.305 djm 1721: {
1722: int *agent_fdp = (int *)ctx;
1723:
1724: return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
1725: data, datalen, alg, compat);
1726: }
1727:
1.179 djm 1728: static void
1.325 djm 1729: do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
1.326 djm 1730: unsigned long long cert_serial, int cert_serial_autoinc,
1731: int argc, char **argv)
1.179 djm 1732: {
1.409 djm 1733: int r, i, found, agent_fd = -1;
1.179 djm 1734: u_int n;
1.252 djm 1735: struct sshkey *ca, *public;
1.374 djm 1736: char valid[64], *otmp, *tmp, *cp, *out, *comment;
1.416 djm 1737: char *ca_fp = NULL, **plist = NULL, *pin = NULL;
1.305 djm 1738: struct ssh_identitylist *agent_ids;
1739: size_t j;
1.374 djm 1740: struct notifier_ctx *notifier = NULL;
1.186 djm 1741:
1.246 markus 1742: #ifdef ENABLE_PKCS11
1.197 djm 1743: pkcs11_init(1);
1.246 markus 1744: #endif
1.197 djm 1745: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1746: if (pkcs11provider != NULL) {
1.305 djm 1747: /* If a PKCS#11 token was specified then try to use it */
1.197 djm 1748: if ((ca = load_pkcs11_key(tmp)) == NULL)
1749: fatal("No PKCS#11 key matching %s found", ca_key_path);
1.305 djm 1750: } else if (prefer_agent) {
1751: /*
1752: * Agent signature requested. Try to use agent after making
1753: * sure the public key specified is actually present in the
1754: * agent.
1755: */
1756: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 1757: fatal_r(r, "Cannot load CA public key %s", tmp);
1.305 djm 1758: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
1.421 djm 1759: fatal_r(r, "Cannot use public key for CA signature");
1.305 djm 1760: if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
1.421 djm 1761: fatal_r(r, "Retrieve agent key list");
1.305 djm 1762: found = 0;
1763: for (j = 0; j < agent_ids->nkeys; j++) {
1764: if (sshkey_equal(ca, agent_ids->keys[j])) {
1765: found = 1;
1766: break;
1767: }
1768: }
1769: if (!found)
1770: fatal("CA key %s not found in agent", tmp);
1771: ssh_free_identitylist(agent_ids);
1772: ca->flags |= SSHKEY_FLAG_EXT;
1773: } else {
1774: /* CA key is assumed to be a private key on the filesystem */
1.341 djm 1775: ca = load_identity(tmp, NULL);
1.416 djm 1776: if (sshkey_is_sk(ca) &&
1777: (ca->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
1778: if ((pin = read_passphrase("Enter PIN for CA key: ",
1779: RP_ALLOW_STDIN)) == NULL)
1.421 djm 1780: fatal_f("couldn't read PIN");
1.416 djm 1781: }
1.305 djm 1782: }
1.227 djm 1783: free(tmp);
1.197 djm 1784:
1.390 djm 1785: if (key_type_name != NULL) {
1786: if (sshkey_type_from_name(key_type_name) != ca->type) {
1787: fatal("CA key type %s doesn't match specified %s",
1788: sshkey_ssh_name(ca), key_type_name);
1789: }
1790: } else if (ca->type == KEY_RSA) {
1791: /* Default to a good signature algorithm */
1792: key_type_name = "rsa-sha2-512";
1.290 djm 1793: }
1.374 djm 1794: ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
1.290 djm 1795:
1.415 djm 1796: finalise_cert_exts();
1.179 djm 1797: for (i = 0; i < argc; i++) {
1798: /* Split list of principals */
1799: n = 0;
1800: if (cert_principals != NULL) {
1801: otmp = tmp = xstrdup(cert_principals);
1802: plist = NULL;
1803: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1.270 deraadt 1804: plist = xreallocarray(plist, n + 1, sizeof(*plist));
1.179 djm 1805: if (*(plist[n] = xstrdup(cp)) == '\0')
1806: fatal("Empty principal name");
1807: }
1.227 djm 1808: free(otmp);
1.179 djm 1809: }
1.312 djm 1810: if (n > SSHKEY_CERT_MAX_PRINCIPALS)
1811: fatal("Too many certificate principals specified");
1.337 djm 1812:
1.179 djm 1813: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1.252 djm 1814: if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1.421 djm 1815: fatal_r(r, "load pubkey \"%s\"", tmp);
1.366 djm 1816: if (sshkey_is_cert(public))
1.421 djm 1817: fatal_f("key \"%s\" type %s cannot be certified",
1818: tmp, sshkey_type(public));
1.179 djm 1819:
1820: /* Prepare certificate to sign */
1.275 djm 1821: if ((r = sshkey_to_certified(public)) != 0)
1.421 djm 1822: fatal_r(r, "Could not upgrade key %s to certificate", tmp);
1.179 djm 1823: public->cert->type = cert_key_type;
1.186 djm 1824: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1825: public->cert->key_id = xstrdup(cert_key_id);
1826: public->cert->nprincipals = n;
1827: public->cert->principals = plist;
1828: public->cert->valid_after = cert_valid_from;
1829: public->cert->valid_before = cert_valid_to;
1.275 djm 1830: prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1831: prepare_options_buf(public->cert->extensions,
1832: OPTIONS_EXTENSIONS);
1.252 djm 1833: if ((r = sshkey_from_private(ca,
1834: &public->cert->signature_key)) != 0)
1.421 djm 1835: fatal_r(r, "sshkey_from_private (ca key)");
1.179 djm 1836:
1.305 djm 1837: if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
1838: if ((r = sshkey_certify_custom(public, ca,
1.416 djm 1839: key_type_name, sk_provider, NULL, agent_signer,
1.358 djm 1840: &agent_fd)) != 0)
1.421 djm 1841: fatal_r(r, "Couldn't certify %s via agent", tmp);
1.305 djm 1842: } else {
1.374 djm 1843: if (sshkey_is_sk(ca) &&
1844: (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
1845: notifier = notify_start(0,
1846: "Confirm user presence for key %s %s",
1847: sshkey_type(ca), ca_fp);
1848: }
1849: r = sshkey_certify(public, ca, key_type_name,
1.416 djm 1850: sk_provider, pin);
1.424 djm 1851: notify_complete(notifier, "User presence confirmed");
1.374 djm 1852: if (r != 0)
1.421 djm 1853: fatal_r(r, "Couldn't certify key %s", tmp);
1.305 djm 1854: }
1.179 djm 1855:
1856: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1857: *cp = '\0';
1858: xasprintf(&out, "%s-cert.pub", tmp);
1.227 djm 1859: free(tmp);
1.179 djm 1860:
1.409 djm 1861: if ((r = sshkey_save_public(public, out, comment)) != 0) {
1.421 djm 1862: fatal_r(r, "Unable to save public key to %s",
1863: identity_file);
1.409 djm 1864: }
1.179 djm 1865:
1.186 djm 1866: if (!quiet) {
1.282 djm 1867: sshkey_format_cert_validity(public->cert,
1.281 djm 1868: valid, sizeof(valid));
1.186 djm 1869: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1.282 djm 1870: "valid %s", sshkey_cert_type(public),
1.205 djm 1871: out, public->cert->key_id,
1872: (unsigned long long)public->cert->serial,
1.179 djm 1873: cert_principals != NULL ? " for " : "",
1874: cert_principals != NULL ? cert_principals : "",
1.281 djm 1875: valid);
1.186 djm 1876: }
1.179 djm 1877:
1.252 djm 1878: sshkey_free(public);
1.227 djm 1879: free(out);
1.326 djm 1880: if (cert_serial_autoinc)
1881: cert_serial++;
1.179 djm 1882: }
1.416 djm 1883: if (pin != NULL)
1884: freezero(pin, strlen(pin));
1.374 djm 1885: free(ca_fp);
1.246 markus 1886: #ifdef ENABLE_PKCS11
1.197 djm 1887: pkcs11_terminate();
1.246 markus 1888: #endif
1.179 djm 1889: exit(0);
1890: }
1891:
1892: static u_int64_t
1893: parse_relative_time(const char *s, time_t now)
1894: {
1895: int64_t mul, secs;
1896:
1897: mul = *s == '-' ? -1 : 1;
1898:
1899: if ((secs = convtime(s + 1)) == -1)
1900: fatal("Invalid relative certificate time %s", s);
1901: if (mul == -1 && secs > now)
1902: fatal("Certificate time %s cannot be represented", s);
1903: return now + (u_int64_t)(secs * mul);
1904: }
1905:
1906: static void
1.459 djm 1907: parse_hex_u64(const char *s, uint64_t *up)
1908: {
1909: char *ep;
1910: unsigned long long ull;
1911:
1912: errno = 0;
1913: ull = strtoull(s, &ep, 16);
1914: if (*s == '\0' || *ep != '\0')
1915: fatal("Invalid certificate time: not a number");
1916: if (errno == ERANGE && ull == ULONG_MAX)
1917: fatal_fr(SSH_ERR_SYSTEM_ERROR, "Invalid certificate time");
1918: *up = (uint64_t)ull;
1919: }
1920:
1921: static void
1.179 djm 1922: parse_cert_times(char *timespec)
1923: {
1924: char *from, *to;
1925: time_t now = time(NULL);
1926: int64_t secs;
1927:
1928: /* +timespec relative to now */
1929: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1930: if ((secs = convtime(timespec + 1)) == -1)
1931: fatal("Invalid relative certificate life %s", timespec);
1932: cert_valid_to = now + secs;
1933: /*
1934: * Backdate certificate one minute to avoid problems on hosts
1935: * with poorly-synchronised clocks.
1936: */
1937: cert_valid_from = ((now - 59)/ 60) * 60;
1938: return;
1939: }
1940:
1941: /*
1942: * from:to, where
1.459 djm 1943: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "always"
1944: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | 0x... | "forever"
1.179 djm 1945: */
1946: from = xstrdup(timespec);
1947: to = strchr(from, ':');
1948: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1949: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1950: *to++ = '\0';
1951:
1952: if (*from == '-' || *from == '+')
1953: cert_valid_from = parse_relative_time(from, now);
1.308 djm 1954: else if (strcmp(from, "always") == 0)
1955: cert_valid_from = 0;
1.459 djm 1956: else if (strncmp(from, "0x", 2) == 0)
1957: parse_hex_u64(from, &cert_valid_from);
1.314 djm 1958: else if (parse_absolute_time(from, &cert_valid_from) != 0)
1959: fatal("Invalid from time \"%s\"", from);
1.179 djm 1960:
1961: if (*to == '-' || *to == '+')
1.235 djm 1962: cert_valid_to = parse_relative_time(to, now);
1.308 djm 1963: else if (strcmp(to, "forever") == 0)
1964: cert_valid_to = ~(u_int64_t)0;
1.460 djm 1965: else if (strncmp(to, "0x", 2) == 0)
1.459 djm 1966: parse_hex_u64(to, &cert_valid_to);
1.314 djm 1967: else if (parse_absolute_time(to, &cert_valid_to) != 0)
1968: fatal("Invalid to time \"%s\"", to);
1.179 djm 1969:
1970: if (cert_valid_to <= cert_valid_from)
1971: fatal("Empty certificate validity interval");
1.227 djm 1972: free(from);
1.179 djm 1973: }
1974:
1975: static void
1.186 djm 1976: add_cert_option(char *opt)
1.179 djm 1977: {
1.300 djm 1978: char *val, *cp;
1979: int iscrit = 0;
1.179 djm 1980:
1.208 stevesk 1981: if (strcasecmp(opt, "clear") == 0)
1.190 djm 1982: certflags_flags = 0;
1.179 djm 1983: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1984: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1985: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1986: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1987: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1988: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1989: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1990: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1991: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1992: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1993: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1994: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1995: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1996: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1997: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 1998: certflags_flags |= CERTOPT_PTY;
1.179 djm 1999: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 2000: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 2001: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 2002: certflags_flags |= CERTOPT_USER_RC;
1.371 djm 2003: else if (strcasecmp(opt, "touch-required") == 0)
2004: certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
2005: else if (strcasecmp(opt, "no-touch-required") == 0)
2006: certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
1.453 naddy 2007: else if (strcasecmp(opt, "no-verify-required") == 0)
2008: certflags_flags &= ~CERTOPT_REQUIRE_VERIFY;
2009: else if (strcasecmp(opt, "verify-required") == 0)
2010: certflags_flags |= CERTOPT_REQUIRE_VERIFY;
1.179 djm 2011: else if (strncasecmp(opt, "force-command=", 14) == 0) {
2012: val = opt + 14;
2013: if (*val == '\0')
1.186 djm 2014: fatal("Empty force-command option");
1.190 djm 2015: if (certflags_command != NULL)
1.179 djm 2016: fatal("force-command already specified");
1.190 djm 2017: certflags_command = xstrdup(val);
1.179 djm 2018: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
2019: val = opt + 15;
2020: if (*val == '\0')
1.186 djm 2021: fatal("Empty source-address option");
1.190 djm 2022: if (certflags_src_addr != NULL)
1.179 djm 2023: fatal("source-address already specified");
2024: if (addr_match_cidr_list(NULL, val) != 0)
2025: fatal("Invalid source-address list");
1.190 djm 2026: certflags_src_addr = xstrdup(val);
1.300 djm 2027: } else if (strncasecmp(opt, "extension:", 10) == 0 ||
1.429 djm 2028: (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
1.300 djm 2029: val = xstrdup(strchr(opt, ':') + 1);
2030: if ((cp = strchr(val, '=')) != NULL)
2031: *cp++ = '\0';
1.415 djm 2032: cert_ext_add(val, cp, iscrit);
2033: free(val);
1.179 djm 2034: } else
1.186 djm 2035: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 2036: }
2037:
1.63 itojun 2038: static void
1.275 djm 2039: show_options(struct sshbuf *optbuf, int in_critical)
1.192 djm 2040: {
1.415 djm 2041: char *name, *arg, *hex;
1.252 djm 2042: struct sshbuf *options, *option = NULL;
2043: int r;
2044:
2045: if ((options = sshbuf_fromb(optbuf)) == NULL)
1.421 djm 2046: fatal_f("sshbuf_fromb failed");
1.252 djm 2047: while (sshbuf_len(options) != 0) {
2048: sshbuf_free(option);
2049: option = NULL;
2050: if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
2051: (r = sshbuf_froms(options, &option)) != 0)
1.421 djm 2052: fatal_fr(r, "parse option");
1.192 djm 2053: printf(" %s", name);
1.275 djm 2054: if (!in_critical &&
1.192 djm 2055: (strcmp(name, "permit-X11-forwarding") == 0 ||
2056: strcmp(name, "permit-agent-forwarding") == 0 ||
2057: strcmp(name, "permit-port-forwarding") == 0 ||
2058: strcmp(name, "permit-pty") == 0 ||
1.371 djm 2059: strcmp(name, "permit-user-rc") == 0 ||
2060: strcmp(name, "no-touch-required") == 0)) {
1.192 djm 2061: printf("\n");
1.371 djm 2062: } else if (in_critical &&
1.192 djm 2063: (strcmp(name, "force-command") == 0 ||
2064: strcmp(name, "source-address") == 0)) {
1.252 djm 2065: if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1.421 djm 2066: fatal_fr(r, "parse critical");
1.245 djm 2067: printf(" %s\n", arg);
2068: free(arg);
1.453 naddy 2069: } else if (in_critical &&
2070: strcmp(name, "verify-required") == 0) {
2071: printf("\n");
1.415 djm 2072: } else if (sshbuf_len(option) > 0) {
2073: hex = sshbuf_dtob16(option);
2074: printf(" UNKNOWN OPTION: %s (len %zu)\n",
2075: hex, sshbuf_len(option));
1.252 djm 2076: sshbuf_reset(option);
1.415 djm 2077: free(hex);
2078: } else
2079: printf(" UNKNOWN FLAG OPTION\n");
1.227 djm 2080: free(name);
1.252 djm 2081: if (sshbuf_len(option) != 0)
1.192 djm 2082: fatal("Option corrupt: extra data at end");
2083: }
1.252 djm 2084: sshbuf_free(option);
2085: sshbuf_free(options);
1.192 djm 2086: }
2087:
2088: static void
1.278 djm 2089: print_cert(struct sshkey *key)
1.182 djm 2090: {
1.281 djm 2091: char valid[64], *key_fp, *ca_fp;
1.275 djm 2092: u_int i;
1.186 djm 2093:
1.252 djm 2094: key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
2095: ca_fp = sshkey_fingerprint(key->cert->signature_key,
1.251 djm 2096: fingerprint_hash, SSH_FP_DEFAULT);
1.259 djm 2097: if (key_fp == NULL || ca_fp == NULL)
1.421 djm 2098: fatal_f("sshkey_fingerprint fail");
1.281 djm 2099: sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1.182 djm 2100:
1.252 djm 2101: printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
2102: sshkey_cert_type(key));
2103: printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1.323 djm 2104: printf(" Signing CA: %s %s (using %s)\n",
2105: sshkey_type(key->cert->signature_key), ca_fp,
2106: key->cert->signature_type);
1.186 djm 2107: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1.275 djm 2108: printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1.281 djm 2109: printf(" Valid: %s\n", valid);
1.182 djm 2110: printf(" Principals: ");
2111: if (key->cert->nprincipals == 0)
2112: printf("(none)\n");
2113: else {
2114: for (i = 0; i < key->cert->nprincipals; i++)
2115: printf("\n %s",
2116: key->cert->principals[i]);
2117: printf("\n");
2118: }
1.186 djm 2119: printf(" Critical Options: ");
1.252 djm 2120: if (sshbuf_len(key->cert->critical) == 0)
1.182 djm 2121: printf("(none)\n");
2122: else {
2123: printf("\n");
1.275 djm 2124: show_options(key->cert->critical, 1);
1.186 djm 2125: }
1.275 djm 2126: printf(" Extensions: ");
2127: if (sshbuf_len(key->cert->extensions) == 0)
2128: printf("(none)\n");
2129: else {
2130: printf("\n");
2131: show_options(key->cert->extensions, 0);
1.182 djm 2132: }
1.278 djm 2133: }
2134:
2135: static void
2136: do_show_cert(struct passwd *pw)
2137: {
2138: struct sshkey *key = NULL;
2139: struct stat st;
2140: int r, is_stdin = 0, ok = 0;
2141: FILE *f;
1.317 markus 2142: char *cp, *line = NULL;
1.278 djm 2143: const char *path;
1.317 markus 2144: size_t linesize = 0;
1.289 djm 2145: u_long lnum = 0;
1.278 djm 2146:
2147: if (!have_identity)
2148: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 2149: if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
1.278 djm 2150: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
2151:
2152: path = identity_file;
2153: if (strcmp(path, "-") == 0) {
2154: f = stdin;
2155: path = "(stdin)";
2156: is_stdin = 1;
2157: } else if ((f = fopen(identity_file, "r")) == NULL)
2158: fatal("fopen %s: %s", identity_file, strerror(errno));
2159:
1.317 markus 2160: while (getline(&line, &linesize, f) != -1) {
2161: lnum++;
1.278 djm 2162: sshkey_free(key);
2163: key = NULL;
2164: /* Trim leading space and comments */
2165: cp = line + strspn(line, " \t");
2166: if (*cp == '#' || *cp == '\0')
2167: continue;
2168: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2169: fatal("sshkey_new");
1.278 djm 2170: if ((r = sshkey_read(key, &cp)) != 0) {
1.421 djm 2171: error_r(r, "%s:%lu: invalid key", path, lnum);
1.278 djm 2172: continue;
2173: }
2174: if (!sshkey_is_cert(key)) {
2175: error("%s:%lu is not a certificate", path, lnum);
2176: continue;
2177: }
2178: ok = 1;
2179: if (!is_stdin && lnum == 1)
2180: printf("%s:\n", path);
2181: else
2182: printf("%s:%lu:\n", path, lnum);
2183: print_cert(key);
2184: }
1.317 markus 2185: free(line);
1.278 djm 2186: sshkey_free(key);
2187: fclose(f);
2188: exit(ok ? 0 : 1);
1.182 djm 2189: }
2190:
2191: static void
1.223 djm 2192: load_krl(const char *path, struct ssh_krl **krlp)
2193: {
1.252 djm 2194: struct sshbuf *krlbuf;
1.393 djm 2195: int r;
1.223 djm 2196:
1.393 djm 2197: if ((r = sshbuf_load_file(path, &krlbuf)) != 0)
1.421 djm 2198: fatal_r(r, "Unable to load KRL %s", path);
1.223 djm 2199: /* XXX check sigs */
1.252 djm 2200: if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1.223 djm 2201: *krlp == NULL)
1.421 djm 2202: fatal_r(r, "Invalid KRL file %s", path);
1.252 djm 2203: sshbuf_free(krlbuf);
1.223 djm 2204: }
2205:
2206: static void
1.320 djm 2207: hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
2208: const char *file, u_long lnum)
2209: {
2210: char *tmp;
2211: size_t tlen;
2212: struct sshbuf *b;
2213: int r;
2214:
2215: if (strncmp(cp, "SHA256:", 7) != 0)
2216: fatal("%s:%lu: unsupported hash algorithm", file, lnum);
2217: cp += 7;
2218:
2219: /*
2220: * OpenSSH base64 hashes omit trailing '='
2221: * characters; put them back for decode.
2222: */
2223: tlen = strlen(cp);
2224: tmp = xmalloc(tlen + 4 + 1);
2225: strlcpy(tmp, cp, tlen + 1);
2226: while ((tlen % 4) != 0) {
2227: tmp[tlen++] = '=';
2228: tmp[tlen] = '\0';
2229: }
2230: if ((b = sshbuf_new()) == NULL)
1.421 djm 2231: fatal_f("sshbuf_new failed");
1.320 djm 2232: if ((r = sshbuf_b64tod(b, tmp)) != 0)
1.421 djm 2233: fatal_r(r, "%s:%lu: decode hash failed", file, lnum);
1.320 djm 2234: free(tmp);
2235: *lenp = sshbuf_len(b);
2236: *blobp = xmalloc(*lenp);
2237: memcpy(*blobp, sshbuf_ptr(b), *lenp);
2238: sshbuf_free(b);
2239: }
2240:
2241: static void
1.261 djm 2242: update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1.252 djm 2243: const struct sshkey *ca, struct ssh_krl *krl)
1.223 djm 2244: {
1.252 djm 2245: struct sshkey *key = NULL;
1.223 djm 2246: u_long lnum = 0;
1.317 markus 2247: char *path, *cp, *ep, *line = NULL;
1.320 djm 2248: u_char *blob = NULL;
2249: size_t blen = 0, linesize = 0;
1.223 djm 2250: unsigned long long serial, serial2;
1.320 djm 2251: int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
1.223 djm 2252: FILE *krl_spec;
2253:
2254: path = tilde_expand_filename(file, pw->pw_uid);
2255: if (strcmp(path, "-") == 0) {
2256: krl_spec = stdin;
2257: free(path);
2258: path = xstrdup("(standard input)");
2259: } else if ((krl_spec = fopen(path, "r")) == NULL)
2260: fatal("fopen %s: %s", path, strerror(errno));
2261:
2262: if (!quiet)
2263: printf("Revoking from %s\n", path);
1.317 markus 2264: while (getline(&line, &linesize, krl_spec) != -1) {
2265: lnum++;
1.320 djm 2266: was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
1.223 djm 2267: cp = line + strspn(line, " \t");
2268: /* Trim trailing space, comments and strip \n */
2269: for (i = 0, r = -1; cp[i] != '\0'; i++) {
2270: if (cp[i] == '#' || cp[i] == '\n') {
2271: cp[i] = '\0';
2272: break;
2273: }
2274: if (cp[i] == ' ' || cp[i] == '\t') {
2275: /* Remember the start of a span of whitespace */
2276: if (r == -1)
2277: r = i;
2278: } else
2279: r = -1;
2280: }
2281: if (r != -1)
2282: cp[r] = '\0';
2283: if (*cp == '\0')
2284: continue;
2285: if (strncasecmp(cp, "serial:", 7) == 0) {
1.261 djm 2286: if (ca == NULL && !wild_ca) {
1.231 djm 2287: fatal("revoking certificates by serial number "
1.223 djm 2288: "requires specification of a CA key");
2289: }
2290: cp += 7;
2291: cp = cp + strspn(cp, " \t");
2292: errno = 0;
2293: serial = strtoull(cp, &ep, 0);
2294: if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2295: fatal("%s:%lu: invalid serial \"%s\"",
2296: path, lnum, cp);
2297: if (errno == ERANGE && serial == ULLONG_MAX)
2298: fatal("%s:%lu: serial out of range",
2299: path, lnum);
2300: serial2 = serial;
2301: if (*ep == '-') {
2302: cp = ep + 1;
2303: errno = 0;
2304: serial2 = strtoull(cp, &ep, 0);
2305: if (*cp == '\0' || *ep != '\0')
2306: fatal("%s:%lu: invalid serial \"%s\"",
2307: path, lnum, cp);
2308: if (errno == ERANGE && serial2 == ULLONG_MAX)
2309: fatal("%s:%lu: serial out of range",
2310: path, lnum);
2311: if (serial2 <= serial)
2312: fatal("%s:%lu: invalid serial range "
2313: "%llu:%llu", path, lnum,
2314: (unsigned long long)serial,
2315: (unsigned long long)serial2);
2316: }
2317: if (ssh_krl_revoke_cert_by_serial_range(krl,
2318: ca, serial, serial2) != 0) {
1.421 djm 2319: fatal_f("revoke serial failed");
1.223 djm 2320: }
2321: } else if (strncasecmp(cp, "id:", 3) == 0) {
1.261 djm 2322: if (ca == NULL && !wild_ca) {
1.232 djm 2323: fatal("revoking certificates by key ID "
1.223 djm 2324: "requires specification of a CA key");
2325: }
2326: cp += 3;
2327: cp = cp + strspn(cp, " \t");
2328: if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
1.421 djm 2329: fatal_f("revoke key ID failed");
1.320 djm 2330: } else if (strncasecmp(cp, "hash:", 5) == 0) {
2331: cp += 5;
2332: cp = cp + strspn(cp, " \t");
2333: hash_to_blob(cp, &blob, &blen, file, lnum);
2334: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
1.401 markus 2335: if (r != 0)
1.421 djm 2336: fatal_fr(r, "revoke key failed");
1.223 djm 2337: } else {
2338: if (strncasecmp(cp, "key:", 4) == 0) {
2339: cp += 4;
2340: cp = cp + strspn(cp, " \t");
2341: was_explicit_key = 1;
2342: } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2343: cp += 5;
2344: cp = cp + strspn(cp, " \t");
2345: was_sha1 = 1;
1.320 djm 2346: } else if (strncasecmp(cp, "sha256:", 7) == 0) {
2347: cp += 7;
2348: cp = cp + strspn(cp, " \t");
2349: was_sha256 = 1;
1.223 djm 2350: /*
2351: * Just try to process the line as a key.
2352: * Parsing will fail if it isn't.
2353: */
2354: }
1.252 djm 2355: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2356: fatal("sshkey_new");
1.252 djm 2357: if ((r = sshkey_read(key, &cp)) != 0)
1.421 djm 2358: fatal_r(r, "%s:%lu: invalid key", path, lnum);
1.223 djm 2359: if (was_explicit_key)
2360: r = ssh_krl_revoke_key_explicit(krl, key);
1.320 djm 2361: else if (was_sha1) {
2362: if (sshkey_fingerprint_raw(key,
2363: SSH_DIGEST_SHA1, &blob, &blen) != 0) {
2364: fatal("%s:%lu: fingerprint failed",
2365: file, lnum);
2366: }
2367: r = ssh_krl_revoke_key_sha1(krl, blob, blen);
2368: } else if (was_sha256) {
2369: if (sshkey_fingerprint_raw(key,
2370: SSH_DIGEST_SHA256, &blob, &blen) != 0) {
2371: fatal("%s:%lu: fingerprint failed",
2372: file, lnum);
2373: }
2374: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
2375: } else
1.223 djm 2376: r = ssh_krl_revoke_key(krl, key);
2377: if (r != 0)
1.421 djm 2378: fatal_fr(r, "revoke key failed");
1.320 djm 2379: freezero(blob, blen);
2380: blob = NULL;
2381: blen = 0;
1.252 djm 2382: sshkey_free(key);
1.223 djm 2383: }
2384: }
2385: if (strcmp(path, "-") != 0)
2386: fclose(krl_spec);
1.317 markus 2387: free(line);
1.226 djm 2388: free(path);
1.223 djm 2389: }
2390:
2391: static void
1.325 djm 2392: do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
2393: unsigned long long krl_version, const char *krl_comment,
2394: int argc, char **argv)
1.223 djm 2395: {
2396: struct ssh_krl *krl;
2397: struct stat sb;
1.252 djm 2398: struct sshkey *ca = NULL;
1.393 djm 2399: int i, r, wild_ca = 0;
1.223 djm 2400: char *tmp;
1.252 djm 2401: struct sshbuf *kbuf;
1.223 djm 2402:
2403: if (*identity_file == '\0')
2404: fatal("KRL generation requires an output file");
2405: if (stat(identity_file, &sb) == -1) {
2406: if (errno != ENOENT)
2407: fatal("Cannot access KRL \"%s\": %s",
2408: identity_file, strerror(errno));
2409: if (updating)
2410: fatal("KRL \"%s\" does not exist", identity_file);
2411: }
2412: if (ca_key_path != NULL) {
1.261 djm 2413: if (strcasecmp(ca_key_path, "none") == 0)
2414: wild_ca = 1;
2415: else {
2416: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2417: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1.421 djm 2418: fatal_r(r, "Cannot load CA public key %s", tmp);
1.261 djm 2419: free(tmp);
2420: }
1.223 djm 2421: }
2422:
2423: if (updating)
2424: load_krl(identity_file, &krl);
2425: else if ((krl = ssh_krl_init()) == NULL)
2426: fatal("couldn't create KRL");
2427:
1.325 djm 2428: if (krl_version != 0)
2429: ssh_krl_set_version(krl, krl_version);
2430: if (krl_comment != NULL)
2431: ssh_krl_set_comment(krl, krl_comment);
1.223 djm 2432:
2433: for (i = 0; i < argc; i++)
1.261 djm 2434: update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
1.223 djm 2435:
1.252 djm 2436: if ((kbuf = sshbuf_new()) == NULL)
2437: fatal("sshbuf_new failed");
2438: if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
1.223 djm 2439: fatal("Couldn't generate KRL");
1.393 djm 2440: if ((r = sshbuf_write_file(identity_file, kbuf)) != 0)
1.223 djm 2441: fatal("write %s: %s", identity_file, strerror(errno));
1.252 djm 2442: sshbuf_free(kbuf);
1.223 djm 2443: ssh_krl_free(krl);
1.286 mmcc 2444: sshkey_free(ca);
1.223 djm 2445: }
2446:
2447: static void
1.405 djm 2448: do_check_krl(struct passwd *pw, int print_krl, int argc, char **argv)
1.223 djm 2449: {
2450: int i, r, ret = 0;
2451: char *comment;
2452: struct ssh_krl *krl;
1.252 djm 2453: struct sshkey *k;
1.223 djm 2454:
2455: if (*identity_file == '\0')
2456: fatal("KRL checking requires an input file");
2457: load_krl(identity_file, &krl);
1.405 djm 2458: if (print_krl)
2459: krl_dump(krl, stdout);
1.223 djm 2460: for (i = 0; i < argc; i++) {
1.252 djm 2461: if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
1.421 djm 2462: fatal_r(r, "Cannot load public key %s", argv[i]);
1.223 djm 2463: r = ssh_krl_check_key(krl, k);
2464: printf("%s%s%s%s: %s\n", argv[i],
2465: *comment ? " (" : "", comment, *comment ? ")" : "",
2466: r == 0 ? "ok" : "REVOKED");
2467: if (r != 0)
2468: ret = 1;
1.252 djm 2469: sshkey_free(k);
1.223 djm 2470: free(comment);
2471: }
2472: ssh_krl_free(krl);
2473: exit(ret);
2474: }
2475:
1.344 djm 2476: static struct sshkey *
2477: load_sign_key(const char *keypath, const struct sshkey *pubkey)
2478: {
2479: size_t i, slen, plen = strlen(keypath);
2480: char *privpath = xstrdup(keypath);
1.448 djm 2481: static const char * const suffixes[] = { "-cert.pub", ".pub", NULL };
1.344 djm 2482: struct sshkey *ret = NULL, *privkey = NULL;
1.451 djm 2483: int r, waspub = 0;
2484: struct stat st;
1.344 djm 2485:
2486: /*
1.404 djm 2487: * If passed a public key filename, then try to locate the corresponding
1.344 djm 2488: * private key. This lets us specify certificates on the command-line
2489: * and have ssh-keygen find the appropriate private key.
2490: */
2491: for (i = 0; suffixes[i]; i++) {
2492: slen = strlen(suffixes[i]);
2493: if (plen <= slen ||
2494: strcmp(privpath + plen - slen, suffixes[i]) != 0)
2495: continue;
2496: privpath[plen - slen] = '\0';
1.421 djm 2497: debug_f("%s looks like a public key, using private key "
2498: "path %s instead", keypath, privpath);
1.451 djm 2499: waspub = 1;
1.344 djm 2500: }
1.451 djm 2501: if (waspub && stat(privpath, &st) != 0 && errno == ENOENT)
2502: fatal("No private key found for public key \"%s\"", keypath);
2503: if ((r = sshkey_load_private(privpath, "", &privkey, NULL)) != 0 &&
2504: (r != SSH_ERR_KEY_WRONG_PASSPHRASE)) {
2505: debug_fr(r, "load private key \"%s\"", privpath);
2506: fatal("No private key found for \"%s\"", privpath);
2507: } else if (privkey == NULL)
2508: privkey = load_identity(privpath, NULL);
2509:
1.344 djm 2510: if (!sshkey_equal_public(pubkey, privkey)) {
2511: error("Public key %s doesn't match private %s",
2512: keypath, privpath);
2513: goto done;
2514: }
2515: if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
2516: /*
2517: * Graft the certificate onto the private key to make
2518: * it capable of signing.
2519: */
2520: if ((r = sshkey_to_certified(privkey)) != 0) {
1.421 djm 2521: error_fr(r, "sshkey_to_certified");
1.344 djm 2522: goto done;
2523: }
2524: if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
1.421 djm 2525: error_fr(r, "sshkey_cert_copy");
1.344 djm 2526: goto done;
2527: }
2528: }
2529: /* success */
2530: ret = privkey;
2531: privkey = NULL;
2532: done:
2533: sshkey_free(privkey);
2534: free(privpath);
2535: return ret;
2536: }
2537:
2538: static int
2539: sign_one(struct sshkey *signkey, const char *filename, int fd,
1.445 djm 2540: const char *sig_namespace, const char *hashalg, sshsig_signer *signer,
2541: void *signer_ctx)
1.344 djm 2542: {
2543: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2544: int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
1.363 djm 2545: char *wfile = NULL, *asig = NULL, *fp = NULL;
1.416 djm 2546: char *pin = NULL, *prompt = NULL;
1.344 djm 2547:
2548: if (!quiet) {
2549: if (fd == STDIN_FILENO)
2550: fprintf(stderr, "Signing data on standard input\n");
2551: else
2552: fprintf(stderr, "Signing file %s\n", filename);
1.363 djm 2553: }
1.416 djm 2554: if (signer == NULL && sshkey_is_sk(signkey)) {
2555: if ((signkey->sk_flags & SSH_SK_USER_VERIFICATION_REQD)) {
2556: xasprintf(&prompt, "Enter PIN for %s key: ",
2557: sshkey_type(signkey));
2558: if ((pin = read_passphrase(prompt,
2559: RP_ALLOW_STDIN)) == NULL)
1.421 djm 2560: fatal_f("couldn't read PIN");
1.416 djm 2561: }
2562: if ((signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
2563: if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
2564: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2565: fatal_f("fingerprint failed");
1.416 djm 2566: fprintf(stderr, "Confirm user presence for key %s %s\n",
2567: sshkey_type(signkey), fp);
2568: free(fp);
2569: }
1.344 djm 2570: }
1.445 djm 2571: if ((r = sshsig_sign_fd(signkey, hashalg, sk_provider, pin,
1.416 djm 2572: fd, sig_namespace, &sigbuf, signer, signer_ctx)) != 0) {
1.421 djm 2573: error_r(r, "Signing %s failed", filename);
1.344 djm 2574: goto out;
2575: }
2576: if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
1.421 djm 2577: error_fr(r, "sshsig_armor");
1.344 djm 2578: goto out;
2579: }
2580: if ((asig = sshbuf_dup_string(abuf)) == NULL) {
1.421 djm 2581: error_f("buffer error");
1.344 djm 2582: r = SSH_ERR_ALLOC_FAIL;
2583: goto out;
2584: }
2585:
2586: if (fd == STDIN_FILENO) {
2587: fputs(asig, stdout);
2588: fflush(stdout);
2589: } else {
2590: xasprintf(&wfile, "%s.sig", filename);
2591: if (confirm_overwrite(wfile)) {
2592: if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
2593: 0666)) == -1) {
2594: oerrno = errno;
2595: error("Cannot open %s: %s",
2596: wfile, strerror(errno));
2597: errno = oerrno;
2598: r = SSH_ERR_SYSTEM_ERROR;
2599: goto out;
2600: }
2601: if (atomicio(vwrite, wfd, asig,
2602: strlen(asig)) != strlen(asig)) {
2603: oerrno = errno;
2604: error("Cannot write to %s: %s",
2605: wfile, strerror(errno));
2606: errno = oerrno;
2607: r = SSH_ERR_SYSTEM_ERROR;
2608: goto out;
2609: }
2610: if (!quiet) {
2611: fprintf(stderr, "Write signature to %s\n",
2612: wfile);
2613: }
2614: }
2615: }
2616: /* success */
2617: r = 0;
2618: out:
2619: free(wfile);
1.416 djm 2620: free(prompt);
1.344 djm 2621: free(asig);
1.416 djm 2622: if (pin != NULL)
2623: freezero(pin, strlen(pin));
1.344 djm 2624: sshbuf_free(abuf);
2625: sshbuf_free(sigbuf);
2626: if (wfd != -1)
2627: close(wfd);
2628: return r;
2629: }
2630:
2631: static int
1.445 djm 2632: sig_process_opts(char * const *opts, size_t nopts, char **hashalgp,
2633: uint64_t *verify_timep, int *print_pubkey)
1.443 djm 2634: {
2635: size_t i;
2636: time_t now;
2637:
2638: if (verify_timep != NULL)
2639: *verify_timep = 0;
2640: if (print_pubkey != NULL)
2641: *print_pubkey = 0;
1.445 djm 2642: if (hashalgp != NULL)
2643: *hashalgp = NULL;
1.443 djm 2644: for (i = 0; i < nopts; i++) {
1.445 djm 2645: if (hashalgp != NULL &&
2646: strncasecmp(opts[i], "hashalg=", 8) == 0) {
2647: *hashalgp = xstrdup(opts[i] + 8);
2648: } else if (verify_timep &&
1.443 djm 2649: strncasecmp(opts[i], "verify-time=", 12) == 0) {
2650: if (parse_absolute_time(opts[i] + 12,
2651: verify_timep) != 0 || *verify_timep == 0) {
2652: error("Invalid \"verify-time\" option");
2653: return SSH_ERR_INVALID_ARGUMENT;
2654: }
2655: } else if (print_pubkey &&
2656: strcasecmp(opts[i], "print-pubkey") == 0) {
2657: *print_pubkey = 1;
2658: } else {
2659: error("Invalid option \"%s\"", opts[i]);
2660: return SSH_ERR_INVALID_ARGUMENT;
2661: }
2662: }
2663: if (verify_timep && *verify_timep == 0) {
2664: if ((now = time(NULL)) < 0) {
2665: error("Time is before epoch");
2666: return SSH_ERR_INVALID_ARGUMENT;
2667: }
2668: *verify_timep = (uint64_t)now;
2669: }
2670: return 0;
2671: }
2672:
2673:
2674: static int
1.452 djm 2675: sig_sign(const char *keypath, const char *sig_namespace, int require_agent,
2676: int argc, char **argv, char * const *opts, size_t nopts)
1.344 djm 2677: {
2678: int i, fd = -1, r, ret = -1;
2679: int agent_fd = -1;
2680: struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
2681: sshsig_signer *signer = NULL;
1.445 djm 2682: char *hashalg = NULL;
1.344 djm 2683:
2684: /* Check file arguments. */
2685: for (i = 0; i < argc; i++) {
2686: if (strcmp(argv[i], "-") != 0)
2687: continue;
2688: if (i > 0 || argc > 1)
2689: fatal("Cannot sign mix of paths and standard input");
2690: }
2691:
1.445 djm 2692: if (sig_process_opts(opts, nopts, &hashalg, NULL, NULL) != 0)
2693: goto done; /* error already logged */
2694:
1.344 djm 2695: if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
1.421 djm 2696: error_r(r, "Couldn't load public key %s", keypath);
1.344 djm 2697: goto done;
2698: }
2699:
1.452 djm 2700: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
2701: if (require_agent)
2702: fatal("Couldn't get agent socket");
1.421 djm 2703: debug_r(r, "Couldn't get agent socket");
1.452 djm 2704: } else {
1.344 djm 2705: if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
2706: signer = agent_signer;
1.452 djm 2707: else {
2708: if (require_agent)
2709: fatal("Couldn't find key in agent");
1.421 djm 2710: debug_r(r, "Couldn't find key in agent");
1.452 djm 2711: }
1.344 djm 2712: }
2713:
2714: if (signer == NULL) {
2715: /* Not using agent - try to load private key */
2716: if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
2717: goto done;
2718: signkey = privkey;
2719: } else {
2720: /* Will use key in agent */
2721: signkey = pubkey;
2722: }
2723:
2724: if (argc == 0) {
2725: if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
1.445 djm 2726: sig_namespace, hashalg, signer, &agent_fd)) != 0)
1.344 djm 2727: goto done;
2728: } else {
2729: for (i = 0; i < argc; i++) {
2730: if (strcmp(argv[i], "-") == 0)
2731: fd = STDIN_FILENO;
2732: else if ((fd = open(argv[i], O_RDONLY)) == -1) {
2733: error("Cannot open %s for signing: %s",
2734: argv[i], strerror(errno));
2735: goto done;
2736: }
2737: if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
1.445 djm 2738: hashalg, signer, &agent_fd)) != 0)
1.344 djm 2739: goto done;
2740: if (fd != STDIN_FILENO)
2741: close(fd);
2742: fd = -1;
2743: }
2744: }
2745:
2746: ret = 0;
2747: done:
2748: if (fd != -1 && fd != STDIN_FILENO)
2749: close(fd);
2750: sshkey_free(pubkey);
2751: sshkey_free(privkey);
1.445 djm 2752: free(hashalg);
1.344 djm 2753: return ret;
1.432 djm 2754: }
2755:
2756: static int
1.386 djm 2757: sig_verify(const char *signature, const char *sig_namespace,
1.432 djm 2758: const char *principal, const char *allowed_keys, const char *revoked_keys,
2759: char * const *opts, size_t nopts)
1.344 djm 2760: {
1.393 djm 2761: int r, ret = -1;
1.435 djm 2762: int print_pubkey = 0;
1.344 djm 2763: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2764: struct sshkey *sign_key = NULL;
2765: char *fp = NULL;
1.370 djm 2766: struct sshkey_sig_details *sig_details = NULL;
1.432 djm 2767: uint64_t verify_time = 0;
2768:
1.445 djm 2769: if (sig_process_opts(opts, nopts, NULL, &verify_time,
2770: &print_pubkey) != 0)
1.432 djm 2771: goto done; /* error already logged */
1.344 djm 2772:
1.370 djm 2773: memset(&sig_details, 0, sizeof(sig_details));
1.393 djm 2774: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2775: error_r(r, "Couldn't read signature file");
1.344 djm 2776: goto done;
2777: }
2778:
2779: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2780: error_fr(r, "sshsig_armor");
1.386 djm 2781: goto done;
1.344 djm 2782: }
2783: if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
1.370 djm 2784: &sign_key, &sig_details)) != 0)
1.344 djm 2785: goto done; /* sshsig_verify() prints error */
2786:
2787: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2788: SSH_FP_DEFAULT)) == NULL)
1.421 djm 2789: fatal_f("sshkey_fingerprint failed");
1.344 djm 2790: debug("Valid (unverified) signature from key %s", fp);
1.370 djm 2791: if (sig_details != NULL) {
1.421 djm 2792: debug2_f("signature details: counter = %u, flags = 0x%02x",
2793: sig_details->sk_counter, sig_details->sk_flags);
1.370 djm 2794: }
1.344 djm 2795: free(fp);
2796: fp = NULL;
2797:
2798: if (revoked_keys != NULL) {
1.345 djm 2799: if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
1.421 djm 2800: debug3_fr(r, "sshkey_check_revoked");
1.345 djm 2801: goto done;
2802: }
1.344 djm 2803: }
2804:
1.421 djm 2805: if (allowed_keys != NULL && (r = sshsig_check_allowed_keys(allowed_keys,
1.432 djm 2806: sign_key, principal, sig_namespace, verify_time)) != 0) {
1.421 djm 2807: debug3_fr(r, "sshsig_check_allowed_keys");
1.344 djm 2808: goto done;
2809: }
2810: /* success */
2811: ret = 0;
2812: done:
2813: if (!quiet) {
2814: if (ret == 0) {
2815: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
1.421 djm 2816: SSH_FP_DEFAULT)) == NULL)
2817: fatal_f("sshkey_fingerprint failed");
1.350 djm 2818: if (principal == NULL) {
2819: printf("Good \"%s\" signature with %s key %s\n",
1.429 djm 2820: sig_namespace, sshkey_type(sign_key), fp);
1.350 djm 2821:
2822: } else {
2823: printf("Good \"%s\" signature for %s with %s key %s\n",
1.429 djm 2824: sig_namespace, principal,
2825: sshkey_type(sign_key), fp);
1.350 djm 2826: }
1.344 djm 2827: } else {
2828: printf("Could not verify signature.\n");
2829: }
2830: }
1.435 djm 2831: /* Print the signature key if requested */
2832: if (ret == 0 && print_pubkey && sign_key != NULL) {
2833: if ((r = sshkey_write(sign_key, stdout)) == 0)
2834: fputc('\n', stdout);
2835: else {
2836: error_r(r, "Could not print public key.\n");
2837: ret = -1;
2838: }
2839: }
1.344 djm 2840: sshbuf_free(sigbuf);
2841: sshbuf_free(abuf);
2842: sshkey_free(sign_key);
1.370 djm 2843: sshkey_sig_details_free(sig_details);
1.344 djm 2844: free(fp);
2845: return ret;
2846: }
2847:
1.386 djm 2848: static int
1.432 djm 2849: sig_find_principals(const char *signature, const char *allowed_keys,
2850: char * const *opts, size_t nopts)
2851: {
1.393 djm 2852: int r, ret = -1;
1.386 djm 2853: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2854: struct sshkey *sign_key = NULL;
1.391 djm 2855: char *principals = NULL, *cp, *tmp;
1.432 djm 2856: uint64_t verify_time = 0;
2857:
1.445 djm 2858: if (sig_process_opts(opts, nopts, NULL, &verify_time, NULL) != 0)
1.432 djm 2859: goto done; /* error already logged */
1.386 djm 2860:
1.393 djm 2861: if ((r = sshbuf_load_file(signature, &abuf)) != 0) {
1.421 djm 2862: error_r(r, "Couldn't read signature file");
1.386 djm 2863: goto done;
2864: }
2865: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
1.421 djm 2866: error_fr(r, "sshsig_armor");
1.386 djm 2867: goto done;
2868: }
2869: if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
1.421 djm 2870: error_fr(r, "sshsig_get_pubkey");
1.386 djm 2871: goto done;
2872: }
1.388 djm 2873: if ((r = sshsig_find_principals(allowed_keys, sign_key,
1.432 djm 2874: verify_time, &principals)) != 0) {
1.431 djm 2875: if (r != SSH_ERR_KEY_NOT_FOUND)
2876: error_fr(r, "sshsig_find_principal");
1.386 djm 2877: goto done;
2878: }
2879: ret = 0;
2880: done:
2881: if (ret == 0 ) {
1.391 djm 2882: /* Emit matching principals one per line */
2883: tmp = principals;
2884: while ((cp = strsep(&tmp, ",")) != NULL && *cp != '\0')
2885: puts(cp);
1.386 djm 2886: } else {
1.391 djm 2887: fprintf(stderr, "No principal matched.\n");
1.386 djm 2888: }
2889: sshbuf_free(sigbuf);
2890: sshbuf_free(abuf);
2891: sshkey_free(sign_key);
1.388 djm 2892: free(principals);
1.386 djm 2893: return ret;
2894: }
2895:
1.441 djm 2896: static int
2897: sig_match_principals(const char *allowed_keys, char *principal,
2898: char * const *opts, size_t nopts)
2899: {
2900: int r;
2901: char **principals = NULL;
2902: size_t i, nprincipals = 0;
2903:
1.445 djm 2904: if ((r = sig_process_opts(opts, nopts, NULL, NULL, NULL)) != 0)
1.441 djm 2905: return r; /* error already logged */
2906:
2907: if ((r = sshsig_match_principals(allowed_keys, principal,
2908: &principals, &nprincipals)) != 0) {
2909: debug_f("match: %s", ssh_err(r));
2910: fprintf(stderr, "No principal matched.\n");
2911: return r;
2912: }
2913: for (i = 0; i < nprincipals; i++) {
2914: printf("%s\n", principals[i]);
2915: free(principals[i]);
2916: }
2917: free(principals);
2918:
2919: return 0;
2920: }
2921:
1.223 djm 2922: static void
1.376 djm 2923: do_moduli_gen(const char *out_file, char **opts, size_t nopts)
2924: {
2925: #ifdef WITH_OPENSSL
2926: /* Moduli generation/screening */
2927: u_int32_t memory = 0;
2928: BIGNUM *start = NULL;
2929: int moduli_bits = 0;
2930: FILE *out;
2931: size_t i;
2932: const char *errstr;
2933:
2934: /* Parse options */
2935: for (i = 0; i < nopts; i++) {
2936: if (strncmp(opts[i], "memory=", 7) == 0) {
2937: memory = (u_int32_t)strtonum(opts[i]+7, 1,
2938: UINT_MAX, &errstr);
2939: if (errstr) {
2940: fatal("Memory limit is %s: %s",
2941: errstr, opts[i]+7);
2942: }
2943: } else if (strncmp(opts[i], "start=", 6) == 0) {
2944: /* XXX - also compare length against bits */
2945: if (BN_hex2bn(&start, opts[i]+6) == 0)
2946: fatal("Invalid start point.");
2947: } else if (strncmp(opts[i], "bits=", 5) == 0) {
2948: moduli_bits = (int)strtonum(opts[i]+5, 1,
2949: INT_MAX, &errstr);
2950: if (errstr) {
2951: fatal("Invalid number: %s (%s)",
2952: opts[i]+12, errstr);
2953: }
2954: } else {
2955: fatal("Option \"%s\" is unsupported for moduli "
2956: "generation", opts[i]);
2957: }
2958: }
2959:
2960: if ((out = fopen(out_file, "w")) == NULL) {
2961: fatal("Couldn't open modulus candidate file \"%s\": %s",
2962: out_file, strerror(errno));
2963: }
2964: setvbuf(out, NULL, _IOLBF, 0);
2965:
2966: if (moduli_bits == 0)
2967: moduli_bits = DEFAULT_BITS;
2968: if (gen_candidates(out, memory, moduli_bits, start) != 0)
2969: fatal("modulus candidate generation failed");
2970: #else /* WITH_OPENSSL */
2971: fatal("Moduli generation is not supported");
2972: #endif /* WITH_OPENSSL */
2973: }
2974:
2975: static void
2976: do_moduli_screen(const char *out_file, char **opts, size_t nopts)
2977: {
2978: #ifdef WITH_OPENSSL
2979: /* Moduli generation/screening */
2980: char *checkpoint = NULL;
2981: u_int32_t generator_wanted = 0;
2982: unsigned long start_lineno = 0, lines_to_process = 0;
2983: int prime_tests = 0;
2984: FILE *out, *in = stdin;
2985: size_t i;
2986: const char *errstr;
2987:
2988: /* Parse options */
2989: for (i = 0; i < nopts; i++) {
2990: if (strncmp(opts[i], "lines=", 6) == 0) {
2991: lines_to_process = strtoul(opts[i]+6, NULL, 10);
2992: } else if (strncmp(opts[i], "start-line=", 11) == 0) {
2993: start_lineno = strtoul(opts[i]+11, NULL, 10);
2994: } else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
1.465 ! dtucker 2995: free(checkpoint);
1.376 djm 2996: checkpoint = xstrdup(opts[i]+11);
2997: } else if (strncmp(opts[i], "generator=", 10) == 0) {
2998: generator_wanted = (u_int32_t)strtonum(
2999: opts[i]+10, 1, UINT_MAX, &errstr);
3000: if (errstr != NULL) {
3001: fatal("Generator invalid: %s (%s)",
3002: opts[i]+10, errstr);
3003: }
3004: } else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
3005: prime_tests = (int)strtonum(opts[i]+12, 1,
3006: INT_MAX, &errstr);
3007: if (errstr) {
3008: fatal("Invalid number: %s (%s)",
3009: opts[i]+12, errstr);
3010: }
3011: } else {
3012: fatal("Option \"%s\" is unsupported for moduli "
3013: "screening", opts[i]);
3014: }
3015: }
3016:
3017: if (have_identity && strcmp(identity_file, "-") != 0) {
3018: if ((in = fopen(identity_file, "r")) == NULL) {
3019: fatal("Couldn't open modulus candidate "
3020: "file \"%s\": %s", identity_file,
3021: strerror(errno));
3022: }
3023: }
3024:
3025: if ((out = fopen(out_file, "a")) == NULL) {
3026: fatal("Couldn't open moduli file \"%s\": %s",
3027: out_file, strerror(errno));
3028: }
3029: setvbuf(out, NULL, _IOLBF, 0);
3030: if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
3031: generator_wanted, checkpoint,
3032: start_lineno, lines_to_process) != 0)
3033: fatal("modulus screening failed");
1.465 ! dtucker 3034: if (in != stdin)
! 3035: (void)fclose(in);
1.464 dtucker 3036: free(checkpoint);
1.376 djm 3037: #else /* WITH_OPENSSL */
3038: fatal("Moduli screening is not supported");
3039: #endif /* WITH_OPENSSL */
3040: }
3041:
1.455 djm 3042: /* Read and confirm a passphrase */
1.381 djm 3043: static char *
1.455 djm 3044: read_check_passphrase(const char *prompt1, const char *prompt2,
3045: const char *retry_prompt)
1.381 djm 3046: {
3047: char *passphrase1, *passphrase2;
3048:
1.455 djm 3049: for (;;) {
3050: passphrase1 = read_passphrase(prompt1, RP_ALLOW_STDIN);
3051: passphrase2 = read_passphrase(prompt2, RP_ALLOW_STDIN);
3052: if (strcmp(passphrase1, passphrase2) == 0) {
1.381 djm 3053: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3054: return passphrase1;
1.381 djm 3055: }
1.455 djm 3056: /* The passphrases do not match. Clear them and retry. */
3057: freezero(passphrase1, strlen(passphrase1));
1.381 djm 3058: freezero(passphrase2, strlen(passphrase2));
1.455 djm 3059: fputs(retry_prompt, stdout);
3060: fputc('\n', stdout);
3061: fflush(stdout);
1.381 djm 3062: }
1.455 djm 3063: /* NOTREACHED */
3064: return NULL;
3065: }
3066:
3067: static char *
3068: private_key_passphrase(void)
3069: {
3070: if (identity_passphrase)
3071: return xstrdup(identity_passphrase);
3072: if (identity_new_passphrase)
3073: return xstrdup(identity_new_passphrase);
3074:
3075: return read_check_passphrase(
3076: "Enter passphrase (empty for no passphrase): ",
3077: "Enter same passphrase again: ",
3078: "Passphrases do not match. Try again.");
1.381 djm 3079: }
3080:
1.439 djm 3081: static char *
3082: sk_suffix(const char *application, const uint8_t *user, size_t userlen)
1.381 djm 3083: {
1.439 djm 3084: char *ret, *cp;
3085: size_t slen, i;
3086:
3087: /* Trim off URL-like preamble */
3088: if (strncmp(application, "ssh://", 6) == 0)
3089: ret = xstrdup(application + 6);
3090: else if (strncmp(application, "ssh:", 4) == 0)
3091: ret = xstrdup(application + 4);
3092: else
3093: ret = xstrdup(application);
3094:
3095: /* Count trailing zeros in user */
3096: for (i = 0; i < userlen; i++) {
3097: if (user[userlen - i - 1] != 0)
3098: break;
3099: }
3100: if (i >= userlen)
3101: return ret; /* user-id was default all-zeros */
3102:
3103: /* Append user-id, escaping non-UTF-8 characters */
3104: slen = userlen - i;
3105: if (asmprintf(&cp, INT_MAX, NULL, "%.*s", (int)slen, user) == -1)
3106: fatal_f("asmprintf failed");
3107: /* Don't emit a user-id that contains path or control characters */
3108: if (strchr(cp, '/') != NULL || strstr(cp, "..") != NULL ||
3109: strchr(cp, '\\') != NULL) {
3110: free(cp);
3111: cp = tohex(user, slen);
3112: }
3113: xextendf(&ret, "_", "%s", cp);
3114: free(cp);
3115: return ret;
1.381 djm 3116: }
3117:
3118: static int
1.382 djm 3119: do_download_sk(const char *skprovider, const char *device)
1.381 djm 3120: {
1.439 djm 3121: struct sshsk_resident_key **srks;
3122: size_t nsrks, i;
1.412 djm 3123: int r, ret = -1;
1.403 djm 3124: char *fp, *pin = NULL, *pass = NULL, *path, *pubpath;
1.381 djm 3125: const char *ext;
1.439 djm 3126: struct sshkey *key;
1.381 djm 3127:
3128: if (skprovider == NULL)
3129: fatal("Cannot download keys without provider");
3130:
1.418 djm 3131: pin = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN);
3132: if (!quiet) {
3133: printf("You may need to touch your authenticator "
3134: "to authorize key download.\n");
3135: }
1.439 djm 3136: if ((r = sshsk_load_resident(skprovider, device, pin, 0,
3137: &srks, &nsrks)) != 0) {
1.418 djm 3138: if (pin != NULL)
3139: freezero(pin, strlen(pin));
1.421 djm 3140: error_r(r, "Unable to load resident keys");
1.418 djm 3141: return -1;
1.381 djm 3142: }
1.439 djm 3143: if (nsrks == 0)
1.381 djm 3144: logit("No keys to download");
1.411 djm 3145: if (pin != NULL)
3146: freezero(pin, strlen(pin));
1.381 djm 3147:
1.439 djm 3148: for (i = 0; i < nsrks; i++) {
3149: key = srks[i]->key;
3150: if (key->type != KEY_ECDSA_SK && key->type != KEY_ED25519_SK) {
1.381 djm 3151: error("Unsupported key type %s (%d)",
1.439 djm 3152: sshkey_type(key), key->type);
1.381 djm 3153: continue;
3154: }
1.439 djm 3155: if ((fp = sshkey_fingerprint(key, fingerprint_hash,
3156: SSH_FP_DEFAULT)) == NULL)
1.421 djm 3157: fatal_f("sshkey_fingerprint failed");
3158: debug_f("key %zu: %s %s %s (flags 0x%02x)", i,
1.439 djm 3159: sshkey_type(key), fp, key->sk_application, key->sk_flags);
3160: ext = sk_suffix(key->sk_application,
3161: srks[i]->user_id, srks[i]->user_id_len);
1.381 djm 3162: xasprintf(&path, "id_%s_rk%s%s",
1.439 djm 3163: key->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
1.381 djm 3164: *ext == '\0' ? "" : "_", ext);
3165:
3166: /* If the file already exists, ask the user to confirm. */
3167: if (!confirm_overwrite(path)) {
3168: free(path);
3169: break;
3170: }
3171:
3172: /* Save the key with the application string as the comment */
3173: if (pass == NULL)
3174: pass = private_key_passphrase();
1.439 djm 3175: if ((r = sshkey_save_private(key, path, pass,
3176: key->sk_application, private_key_format,
1.381 djm 3177: openssh_format_cipher, rounds)) != 0) {
1.421 djm 3178: error_r(r, "Saving key \"%s\" failed", path);
1.381 djm 3179: free(path);
3180: break;
3181: }
3182: if (!quiet) {
1.439 djm 3183: printf("Saved %s key%s%s to %s\n", sshkey_type(key),
1.381 djm 3184: *ext != '\0' ? " " : "",
1.439 djm 3185: *ext != '\0' ? key->sk_application : "",
1.381 djm 3186: path);
3187: }
3188:
3189: /* Save public key too */
3190: xasprintf(&pubpath, "%s.pub", path);
3191: free(path);
1.439 djm 3192: if ((r = sshkey_save_public(key, pubpath,
3193: key->sk_application)) != 0) {
1.421 djm 3194: error_r(r, "Saving public key \"%s\" failed", pubpath);
1.402 markus 3195: free(pubpath);
1.381 djm 3196: break;
3197: }
3198: free(pubpath);
3199: }
3200:
1.439 djm 3201: if (i >= nsrks)
1.412 djm 3202: ret = 0; /* success */
1.381 djm 3203: if (pass != NULL)
3204: freezero(pass, strlen(pass));
1.439 djm 3205: sshsk_free_resident_keys(srks, nsrks);
1.412 djm 3206: return ret;
1.381 djm 3207: }
3208:
1.376 djm 3209: static void
1.420 djm 3210: save_attestation(struct sshbuf *attest, const char *path)
3211: {
3212: mode_t omask;
3213: int r;
3214:
3215: if (path == NULL)
3216: return; /* nothing to do */
3217: if (attest == NULL || sshbuf_len(attest) == 0)
3218: fatal("Enrollment did not return attestation data");
3219: omask = umask(077);
3220: r = sshbuf_write_file(path, attest);
3221: umask(omask);
3222: if (r != 0)
1.421 djm 3223: fatal_r(r, "Unable to write attestation data \"%s\"", path);
1.420 djm 3224: if (!quiet)
3225: printf("Your FIDO attestation certificate has been saved in "
3226: "%s\n", path);
3227: }
3228:
1.456 djm 3229: static int
3230: confirm_sk_overwrite(const char *application, const char *user)
3231: {
3232: char yesno[3];
3233:
3234: printf("A resident key scoped to '%s' with user id '%s' already "
3235: "exists.\n", application == NULL ? "ssh:" : application,
3236: user == NULL ? "null" : user);
3237: printf("Overwrite key in token (y/n)? ");
3238: fflush(stdout);
3239: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
3240: return 0;
3241: if (yesno[0] != 'y' && yesno[0] != 'Y')
3242: return 0;
3243: return 1;
3244: }
3245:
1.420 djm 3246: static void
1.10 markus 3247: usage(void)
3248: {
1.243 deraadt 3249: fprintf(stderr,
1.414 solene 3250: "usage: ssh-keygen [-q] [-a rounds] [-b bits] [-C comment] [-f output_keyfile]\n"
3251: " [-m format] [-N new_passphrase] [-O option]\n"
1.369 naddy 3252: " [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
1.425 dtucker 3253: " [-w provider] [-Z cipher]\n"
1.414 solene 3254: " ssh-keygen -p [-a rounds] [-f keyfile] [-m format] [-N new_passphrase]\n"
1.425 dtucker 3255: " [-P old_passphrase] [-Z cipher]\n"
1.433 dtucker 3256: #ifdef WITH_OPENSSL
1.355 jmc 3257: " ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
3258: " ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
1.434 dtucker 3259: #endif
1.243 deraadt 3260: " ssh-keygen -y [-f input_keyfile]\n"
1.414 solene 3261: " ssh-keygen -c [-a rounds] [-C comment] [-f keyfile] [-P passphrase]\n"
1.265 naddy 3262: " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
1.302 djm 3263: " ssh-keygen -B [-f input_keyfile]\n");
1.177 markus 3264: #ifdef ENABLE_PKCS11
1.243 deraadt 3265: fprintf(stderr,
3266: " ssh-keygen -D pkcs11\n");
1.177 markus 3267: #endif
1.243 deraadt 3268: fprintf(stderr,
1.352 jmc 3269: " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
1.243 deraadt 3270: " ssh-keygen -H [-f known_hosts_file]\n"
1.414 solene 3271: " ssh-keygen -K [-a rounds] [-w provider]\n"
1.243 deraadt 3272: " ssh-keygen -R hostname [-f known_hosts_file]\n"
1.352 jmc 3273: " ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
1.274 djm 3274: #ifdef WITH_OPENSSL
1.383 naddy 3275: " ssh-keygen -M generate [-O option] output_file\n"
3276: " ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
1.274 djm 3277: #endif
1.355 jmc 3278: " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
3279: " [-n principals] [-O option] [-V validity_interval]\n"
3280: " [-z serial_number] file ...\n"
1.243 deraadt 3281: " ssh-keygen -L [-f input_keyfile]\n"
1.414 solene 3282: " ssh-keygen -A [-a rounds] [-f prefix_path]\n"
1.243 deraadt 3283: " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
3284: " file ...\n"
1.405 djm 3285: " ssh-keygen -Q [-l] -f krl_file [file ...]\n"
1.388 djm 3286: " ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
1.442 djm 3287: " ssh-keygen -Y match-principals -I signer_identity -f allowed_signers_file\n"
1.355 jmc 3288: " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
1.445 djm 3289: " ssh-keygen -Y sign -f key_file -n namespace file [-O option] ...\n"
1.355 jmc 3290: " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
1.445 djm 3291: " -n namespace -s signature_file [-r krl_file] [-O option]\n");
1.12 markus 3292: exit(1);
1.10 markus 3293: }
3294:
1.13 deraadt 3295: /*
3296: * Main program for key management.
3297: */
1.2 provos 3298: int
1.156 deraadt 3299: main(int argc, char **argv)
1.1 deraadt 3300: {
1.458 djm 3301: char comment[1024], *passphrase = NULL;
1.274 djm 3302: char *rr_hostname = NULL, *ep, *fp, *ra;
1.252 djm 3303: struct sshkey *private, *public;
1.12 markus 3304: struct passwd *pw;
1.381 djm 3305: int r, opt, type;
1.325 djm 3306: int change_passphrase = 0, change_comment = 0, show_cert = 0;
3307: int find_host = 0, delete_host = 0, hash_hosts = 0;
1.274 djm 3308: int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
1.325 djm 3309: int prefer_agent = 0, convert_to = 0, convert_from = 0;
1.326 djm 3310: int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
1.381 djm 3311: int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
1.380 djm 3312: unsigned long long cert_serial = 0;
1.375 djm 3313: char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
1.382 djm 3314: char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
1.420 djm 3315: char *sk_attestation_path = NULL;
1.395 djm 3316: struct sshbuf *challenge = NULL, *attest = NULL;
1.375 djm 3317: size_t i, nopts = 0;
1.340 dtucker 3318: u_int32_t bits = 0;
1.357 djm 3319: uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
1.274 djm 3320: const char *errstr;
1.325 djm 3321: int log_level = SYSLOG_LEVEL_INFO;
1.344 djm 3322: char *sign_op = NULL;
1.33 markus 3323:
1.12 markus 3324: extern int optind;
3325: extern char *optarg;
1.129 djm 3326:
3327: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
3328: sanitise_stdfd();
1.12 markus 3329:
1.348 djm 3330: #ifdef WITH_OPENSSL
1.201 djm 3331: OpenSSL_add_all_algorithms();
1.348 djm 3332: #endif
1.156 deraadt 3333: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.294 djm 3334:
3335: setlocale(LC_CTYPE, "");
1.19 markus 3336:
1.14 markus 3337: /* we need this for the home * directory. */
1.12 markus 3338: pw = getpwuid(getuid());
1.269 djm 3339: if (!pw)
3340: fatal("No user exists for uid %lu", (u_long)getuid());
1.428 djm 3341: pw = pwcopy(pw);
1.333 deraadt 3342: if (gethostname(hostname, sizeof(hostname)) == -1)
1.269 djm 3343: fatal("gethostname: %s", strerror(errno));
1.14 markus 3344:
1.357 djm 3345: sk_provider = getenv("SSH_SK_PROVIDER");
3346:
1.381 djm 3347: /* Remaining characters: dGjJSTWx */
3348: while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
1.376 djm 3349: "C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
1.380 djm 3350: "a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
1.12 markus 3351: switch (opt) {
1.206 stevesk 3352: case 'A':
3353: gen_all_hostkeys = 1;
3354: break;
1.12 markus 3355: case 'b':
1.340 dtucker 3356: bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
3357: &errstr);
1.125 avsm 3358: if (errstr)
3359: fatal("Bits has bad value %s (%s)",
3360: optarg, errstr);
1.12 markus 3361: break;
1.251 djm 3362: case 'E':
3363: fingerprint_hash = ssh_digest_alg_by_name(optarg);
3364: if (fingerprint_hash == -1)
3365: fatal("Invalid hash algorithm \"%s\"", optarg);
3366: break;
1.119 djm 3367: case 'F':
3368: find_host = 1;
3369: rr_hostname = optarg;
3370: break;
3371: case 'H':
3372: hash_hosts = 1;
3373: break;
1.179 djm 3374: case 'I':
3375: cert_key_id = optarg;
3376: break;
1.119 djm 3377: case 'R':
3378: delete_host = 1;
3379: rr_hostname = optarg;
3380: break;
1.182 djm 3381: case 'L':
3382: show_cert = 1;
3383: break;
1.12 markus 3384: case 'l':
3385: print_fingerprint = 1;
3386: break;
1.49 markus 3387: case 'B':
3388: print_bubblebabble = 1;
3389: break;
1.193 djm 3390: case 'm':
3391: if (strcasecmp(optarg, "RFC4716") == 0 ||
3392: strcasecmp(optarg, "ssh2") == 0) {
3393: convert_format = FMT_RFC4716;
3394: break;
3395: }
3396: if (strcasecmp(optarg, "PKCS8") == 0) {
3397: convert_format = FMT_PKCS8;
1.336 djm 3398: private_key_format = SSHKEY_PRIVATE_PKCS8;
1.193 djm 3399: break;
3400: }
3401: if (strcasecmp(optarg, "PEM") == 0) {
3402: convert_format = FMT_PEM;
1.336 djm 3403: private_key_format = SSHKEY_PRIVATE_PEM;
1.193 djm 3404: break;
3405: }
3406: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 3407: case 'n':
3408: cert_principals = optarg;
3409: break;
1.237 markus 3410: case 'o':
1.319 djm 3411: /* no-op; new format is already the default */
1.237 markus 3412: break;
1.12 markus 3413: case 'p':
3414: change_passphrase = 1;
3415: break;
3416: case 'c':
3417: change_comment = 1;
3418: break;
3419: case 'f':
1.274 djm 3420: if (strlcpy(identity_file, optarg,
3421: sizeof(identity_file)) >= sizeof(identity_file))
1.124 avsm 3422: fatal("Identity filename too long");
1.12 markus 3423: have_identity = 1;
3424: break;
1.105 jakob 3425: case 'g':
3426: print_generic = 1;
3427: break;
1.381 djm 3428: case 'K':
3429: download_sk = 1;
3430: break;
1.12 markus 3431: case 'P':
3432: identity_passphrase = optarg;
3433: break;
3434: case 'N':
3435: identity_new_passphrase = optarg;
3436: break;
1.223 djm 3437: case 'Q':
3438: check_krl = 1;
3439: break;
1.179 djm 3440: case 'O':
1.375 djm 3441: opts = xrecallocarray(opts, nopts, nopts + 1,
3442: sizeof(*opts));
3443: opts[nopts++] = xstrdup(optarg);
1.179 djm 3444: break;
1.237 markus 3445: case 'Z':
1.336 djm 3446: openssh_format_cipher = optarg;
1.425 dtucker 3447: if (cipher_by_name(openssh_format_cipher) == NULL)
3448: fatal("Invalid OpenSSH-format cipher '%s'",
3449: openssh_format_cipher);
1.237 markus 3450: break;
1.12 markus 3451: case 'C':
3452: identity_comment = optarg;
3453: break;
3454: case 'q':
3455: quiet = 1;
1.20 deraadt 3456: break;
1.57 markus 3457: case 'e':
3458: /* export key */
1.193 djm 3459: convert_to = 1;
1.19 markus 3460: break;
1.179 djm 3461: case 'h':
3462: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 3463: certflags_flags = 0;
1.179 djm 3464: break;
1.223 djm 3465: case 'k':
3466: gen_krl = 1;
3467: break;
1.57 markus 3468: case 'i':
1.19 markus 3469: case 'X':
1.57 markus 3470: /* import key */
1.193 djm 3471: convert_from = 1;
1.19 markus 3472: break;
3473: case 'y':
3474: print_public = 1;
3475: break;
1.179 djm 3476: case 's':
3477: ca_key_path = optarg;
3478: break;
1.33 markus 3479: case 't':
3480: key_type_name = optarg;
3481: break;
1.75 markus 3482: case 'D':
1.177 markus 3483: pkcs11provider = optarg;
1.305 djm 3484: break;
3485: case 'U':
3486: prefer_agent = 1;
1.66 markus 3487: break;
1.223 djm 3488: case 'u':
3489: update_krl = 1;
3490: break;
1.113 djm 3491: case 'v':
3492: if (log_level == SYSLOG_LEVEL_INFO)
3493: log_level = SYSLOG_LEVEL_DEBUG1;
3494: else {
1.117 deraadt 3495: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 3496: log_level < SYSLOG_LEVEL_DEBUG3)
3497: log_level++;
3498: }
3499: break;
1.105 jakob 3500: case 'r':
1.119 djm 3501: rr_hostname = optarg;
1.105 jakob 3502: break;
1.107 djm 3503: case 'a':
1.237 markus 3504: rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
1.124 avsm 3505: if (errstr)
1.237 markus 3506: fatal("Invalid number: %s (%s)",
1.124 avsm 3507: optarg, errstr);
1.107 djm 3508: break;
1.274 djm 3509: case 'V':
3510: parse_cert_times(optarg);
3511: break;
1.344 djm 3512: case 'Y':
3513: sign_op = optarg;
1.365 djm 3514: break;
1.357 djm 3515: case 'w':
3516: sk_provider = optarg;
3517: break;
1.274 djm 3518: case 'z':
3519: errno = 0;
1.326 djm 3520: if (*optarg == '+') {
3521: cert_serial_autoinc = 1;
3522: optarg++;
3523: }
1.274 djm 3524: cert_serial = strtoull(optarg, &ep, 10);
3525: if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
3526: (errno == ERANGE && cert_serial == ULLONG_MAX))
3527: fatal("Invalid serial number \"%s\"", optarg);
1.107 djm 3528: break;
1.274 djm 3529: case 'M':
1.376 djm 3530: if (strcmp(optarg, "generate") == 0)
3531: do_gen_candidates = 1;
3532: else if (strcmp(optarg, "screen") == 0)
3533: do_screen_candidates = 1;
3534: else
3535: fatal("Unsupported moduli option %s", optarg);
1.179 djm 3536: break;
1.12 markus 3537: default:
3538: usage();
3539: }
3540: }
1.364 djm 3541:
3542: if (sk_provider == NULL)
3543: sk_provider = "internal";
1.113 djm 3544:
3545: /* reinit */
1.156 deraadt 3546: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 3547:
1.179 djm 3548: argv += optind;
3549: argc -= optind;
1.344 djm 3550:
3551: if (sign_op != NULL) {
1.388 djm 3552: if (strncmp(sign_op, "find-principals", 15) == 0) {
1.386 djm 3553: if (ca_key_path == NULL) {
1.388 djm 3554: error("Too few arguments for find-principals:"
1.429 djm 3555: "missing signature file");
1.386 djm 3556: exit(1);
3557: }
3558: if (!have_identity) {
1.388 djm 3559: error("Too few arguments for find-principals:"
1.429 djm 3560: "missing allowed keys file");
1.386 djm 3561: exit(1);
3562: }
1.432 djm 3563: return sig_find_principals(ca_key_path, identity_file,
1.441 djm 3564: opts, nopts);
3565: } else if (strncmp(sign_op, "match-principals", 16) == 0) {
3566: if (!have_identity) {
3567: error("Too few arguments for match-principals:"
3568: "missing allowed keys file");
3569: exit(1);
3570: }
3571: if (cert_key_id == NULL) {
3572: error("Too few arguments for match-principals: "
3573: "missing principal ID");
3574: exit(1);
3575: }
3576: return sig_match_principals(identity_file, cert_key_id,
1.432 djm 3577: opts, nopts);
1.391 djm 3578: } else if (strncmp(sign_op, "sign", 4) == 0) {
1.447 djm 3579: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3580: if (cert_principals == NULL ||
3581: *cert_principals == '\0') {
3582: error("Too few arguments for sign: "
3583: "missing namespace");
3584: exit(1);
3585: }
1.344 djm 3586: if (!have_identity) {
3587: error("Too few arguments for sign: "
3588: "missing key");
3589: exit(1);
3590: }
1.386 djm 3591: return sig_sign(identity_file, cert_principals,
1.452 djm 3592: prefer_agent, argc, argv, opts, nopts);
1.350 djm 3593: } else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
1.450 djm 3594: /* NB. cert_principals is actually namespace, via -n */
1.449 djm 3595: if (cert_principals == NULL ||
3596: *cert_principals == '\0') {
3597: error("Too few arguments for check-novalidate: "
3598: "missing namespace");
3599: exit(1);
3600: }
1.350 djm 3601: if (ca_key_path == NULL) {
3602: error("Too few arguments for check-novalidate: "
1.429 djm 3603: "missing signature file");
1.350 djm 3604: exit(1);
3605: }
1.386 djm 3606: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3607: NULL, NULL, NULL, opts, nopts);
1.344 djm 3608: } else if (strncmp(sign_op, "verify", 6) == 0) {
1.447 djm 3609: /* NB. cert_principals is actually namespace, via -n */
1.391 djm 3610: if (cert_principals == NULL ||
3611: *cert_principals == '\0') {
3612: error("Too few arguments for verify: "
1.447 djm 3613: "missing namespace");
1.391 djm 3614: exit(1);
3615: }
1.344 djm 3616: if (ca_key_path == NULL) {
3617: error("Too few arguments for verify: "
3618: "missing signature file");
3619: exit(1);
3620: }
3621: if (!have_identity) {
3622: error("Too few arguments for sign: "
3623: "missing allowed keys file");
3624: exit(1);
3625: }
3626: if (cert_key_id == NULL) {
3627: error("Too few arguments for verify: "
1.447 djm 3628: "missing principal identity");
1.344 djm 3629: exit(1);
3630: }
1.386 djm 3631: return sig_verify(ca_key_path, cert_principals,
1.432 djm 3632: cert_key_id, identity_file, rr_hostname,
3633: opts, nopts);
1.344 djm 3634: }
1.391 djm 3635: error("Unsupported operation for -Y: \"%s\"", sign_op);
1.344 djm 3636: usage();
3637: /* NOTREACHED */
3638: }
1.179 djm 3639:
3640: if (ca_key_path != NULL) {
1.223 djm 3641: if (argc < 1 && !gen_krl) {
1.269 djm 3642: error("Too few arguments.");
1.179 djm 3643: usage();
3644: }
1.376 djm 3645: } else if (argc > 0 && !gen_krl && !check_krl &&
3646: !do_gen_candidates && !do_screen_candidates) {
1.269 djm 3647: error("Too many arguments.");
1.87 djm 3648: usage();
3649: }
1.12 markus 3650: if (change_passphrase && change_comment) {
1.269 djm 3651: error("Can only have one of -p and -c.");
1.166 djm 3652: usage();
3653: }
3654: if (print_fingerprint && (delete_host || hash_hosts)) {
1.269 djm 3655: error("Cannot use -l with -H or -R.");
1.12 markus 3656: usage();
1.223 djm 3657: }
1.376 djm 3658: if (gen_krl) {
1.325 djm 3659: do_gen_krl(pw, update_krl, ca_key_path,
3660: cert_serial, identity_comment, argc, argv);
1.223 djm 3661: return (0);
3662: }
3663: if (check_krl) {
1.405 djm 3664: do_check_krl(pw, print_fingerprint, argc, argv);
1.223 djm 3665: return (0);
1.179 djm 3666: }
3667: if (ca_key_path != NULL) {
3668: if (cert_key_id == NULL)
3669: fatal("Must specify key id (-I) when certifying");
1.375 djm 3670: for (i = 0; i < nopts; i++)
3671: add_cert_option(opts[i]);
1.326 djm 3672: do_ca_sign(pw, ca_key_path, prefer_agent,
3673: cert_serial, cert_serial_autoinc, argc, argv);
1.12 markus 3674: }
1.182 djm 3675: if (show_cert)
3676: do_show_cert(pw);
1.325 djm 3677: if (delete_host || hash_hosts || find_host) {
3678: do_known_hosts(pw, rr_hostname, find_host,
3679: delete_host, hash_hosts);
3680: }
1.221 djm 3681: if (pkcs11provider != NULL)
3682: do_download(pw);
1.382 djm 3683: if (download_sk) {
3684: for (i = 0; i < nopts; i++) {
3685: if (strncasecmp(opts[i], "device=", 7) == 0) {
3686: sk_device = xstrdup(opts[i] + 7);
3687: } else {
3688: fatal("Option \"%s\" is unsupported for "
3689: "FIDO authenticator download", opts[i]);
3690: }
3691: }
3692: return do_download_sk(sk_provider, sk_device);
3693: }
1.49 markus 3694: if (print_fingerprint || print_bubblebabble)
1.12 markus 3695: do_fingerprint(pw);
3696: if (change_passphrase)
3697: do_change_passphrase(pw);
3698: if (change_comment)
1.325 djm 3699: do_change_comment(pw, identity_comment);
1.246 markus 3700: #ifdef WITH_OPENSSL
1.193 djm 3701: if (convert_to)
3702: do_convert_to(pw);
3703: if (convert_from)
3704: do_convert_from(pw);
1.349 djm 3705: #else /* WITH_OPENSSL */
3706: if (convert_to || convert_from)
3707: fatal("key conversion disabled at compile time");
3708: #endif /* WITH_OPENSSL */
1.19 markus 3709: if (print_public)
3710: do_print_public(pw);
1.119 djm 3711: if (rr_hostname != NULL) {
1.138 jakob 3712: unsigned int n = 0;
3713:
3714: if (have_identity) {
1.325 djm 3715: n = do_print_resource_record(pw, identity_file,
1.462 djm 3716: rr_hostname, print_generic, opts, nopts);
1.269 djm 3717: if (n == 0)
3718: fatal("%s: %s", identity_file, strerror(errno));
1.138 jakob 3719: exit(0);
3720: } else {
3721:
3722: n += do_print_resource_record(pw,
1.325 djm 3723: _PATH_HOST_RSA_KEY_FILE, rr_hostname,
1.462 djm 3724: print_generic, opts, nopts);
1.138 jakob 3725: n += do_print_resource_record(pw,
1.325 djm 3726: _PATH_HOST_DSA_KEY_FILE, rr_hostname,
1.462 djm 3727: print_generic, opts, nopts);
1.214 djm 3728: n += do_print_resource_record(pw,
1.325 djm 3729: _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
1.462 djm 3730: print_generic, opts, nopts);
1.244 logan 3731: n += do_print_resource_record(pw,
1.325 djm 3732: _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
1.462 djm 3733: print_generic, opts, nopts);
1.313 markus 3734: n += do_print_resource_record(pw,
1.325 djm 3735: _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
1.462 djm 3736: print_generic, opts, nopts);
1.138 jakob 3737: if (n == 0)
3738: fatal("no keys found.");
3739: exit(0);
3740: }
1.105 jakob 3741: }
1.107 djm 3742:
1.376 djm 3743: if (do_gen_candidates || do_screen_candidates) {
3744: if (argc <= 0)
3745: fatal("No output file specified");
3746: else if (argc > 1)
3747: fatal("Too many output files specified");
3748: }
1.107 djm 3749: if (do_gen_candidates) {
1.376 djm 3750: do_moduli_gen(argv[0], opts, nopts);
3751: return 0;
1.107 djm 3752: }
3753: if (do_screen_candidates) {
1.376 djm 3754: do_moduli_screen(argv[0], opts, nopts);
3755: return 0;
1.75 markus 3756: }
1.12 markus 3757:
1.206 stevesk 3758: if (gen_all_hostkeys) {
3759: do_gen_all_hostkeys(pw);
3760: return (0);
3761: }
3762:
1.133 djm 3763: if (key_type_name == NULL)
1.273 djm 3764: key_type_name = DEFAULT_KEY_TYPE_NAME;
1.133 djm 3765:
1.252 djm 3766: type = sshkey_type_from_name(key_type_name);
1.255 djm 3767: type_bits_valid(type, key_type_name, &bits);
1.206 stevesk 3768:
1.33 markus 3769: if (!quiet)
1.252 djm 3770: printf("Generating public/private %s key pair.\n",
3771: key_type_name);
1.362 markus 3772: switch (type) {
3773: case KEY_ECDSA_SK:
3774: case KEY_ED25519_SK:
1.380 djm 3775: for (i = 0; i < nopts; i++) {
3776: if (strcasecmp(opts[i], "no-touch-required") == 0) {
3777: sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
1.416 djm 3778: } else if (strcasecmp(opts[i], "verify-required") == 0) {
3779: sk_flags |= SSH_SK_USER_VERIFICATION_REQD;
1.380 djm 3780: } else if (strcasecmp(opts[i], "resident") == 0) {
3781: sk_flags |= SSH_SK_RESIDENT_KEY;
1.382 djm 3782: } else if (strncasecmp(opts[i], "device=", 7) == 0) {
3783: sk_device = xstrdup(opts[i] + 7);
3784: } else if (strncasecmp(opts[i], "user=", 5) == 0) {
3785: sk_user = xstrdup(opts[i] + 5);
1.395 djm 3786: } else if (strncasecmp(opts[i], "challenge=", 10) == 0) {
3787: if ((r = sshbuf_load_file(opts[i] + 10,
3788: &challenge)) != 0) {
1.421 djm 3789: fatal_r(r, "Unable to load FIDO "
3790: "enrollment challenge \"%s\"",
3791: opts[i] + 10);
1.395 djm 3792: }
3793: } else if (strncasecmp(opts[i],
3794: "write-attestation=", 18) == 0) {
1.420 djm 3795: sk_attestation_path = opts[i] + 18;
1.382 djm 3796: } else if (strncasecmp(opts[i],
3797: "application=", 12) == 0) {
3798: sk_application = xstrdup(opts[i] + 12);
1.396 djm 3799: if (strncmp(sk_application, "ssh:", 4) != 0) {
3800: fatal("FIDO application string must "
3801: "begin with \"ssh:\"");
3802: }
1.380 djm 3803: } else {
3804: fatal("Option \"%s\" is unsupported for "
3805: "FIDO authenticator enrollment", opts[i]);
3806: }
3807: }
1.395 djm 3808: if ((attest = sshbuf_new()) == NULL)
3809: fatal("sshbuf_new failed");
1.457 djm 3810: r = 0;
3811: for (i = 0 ;;) {
3812: if (!quiet) {
3813: printf("You may need to touch your "
3814: "authenticator%s to authorize key "
3815: "generation.\n",
3816: r == 0 ? "" : " again");
3817: }
1.379 djm 3818: fflush(stdout);
1.382 djm 3819: r = sshsk_enroll(type, sk_provider, sk_device,
3820: sk_application == NULL ? "ssh:" : sk_application,
1.395 djm 3821: sk_user, sk_flags, passphrase, challenge,
3822: &private, attest);
1.379 djm 3823: if (r == 0)
3824: break;
1.456 djm 3825: if (r == SSH_ERR_KEY_BAD_PERMISSIONS &&
3826: (sk_flags & SSH_SK_RESIDENT_KEY) != 0 &&
3827: (sk_flags & SSH_SK_FORCE_OPERATION) == 0 &&
3828: confirm_sk_overwrite(sk_application, sk_user)) {
3829: sk_flags |= SSH_SK_FORCE_OPERATION;
3830: continue;
3831: }
1.379 djm 3832: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1.421 djm 3833: fatal_r(r, "Key enrollment failed");
1.418 djm 3834: else if (passphrase != NULL) {
1.398 djm 3835: error("PIN incorrect");
1.381 djm 3836: freezero(passphrase, strlen(passphrase));
1.398 djm 3837: passphrase = NULL;
3838: }
1.457 djm 3839: if (++i >= 3)
1.398 djm 3840: fatal("Too many incorrect PINs");
1.397 naddy 3841: passphrase = read_passphrase("Enter PIN for "
3842: "authenticator: ", RP_ALLOW_STDIN);
1.373 djm 3843: }
1.398 djm 3844: if (passphrase != NULL) {
1.381 djm 3845: freezero(passphrase, strlen(passphrase));
1.398 djm 3846: passphrase = NULL;
3847: }
1.362 markus 3848: break;
3849: default:
3850: if ((r = sshkey_generate(type, bits, &private)) != 0)
3851: fatal("sshkey_generate failed");
3852: break;
3853: }
1.269 djm 3854: if ((r = sshkey_from_private(private, &public)) != 0)
1.421 djm 3855: fatal_r(r, "sshkey_from_private");
1.12 markus 3856:
3857: if (!have_identity)
3858: ask_filename(pw, "Enter file in which to save the key");
3859:
1.132 djm 3860: /* Create ~/.ssh directory if it doesn't already exist. */
1.413 dtucker 3861: hostfile_create_user_ssh_dir(identity_file, !quiet);
3862:
1.12 markus 3863: /* If the file already exists, ask the user to confirm. */
1.343 djm 3864: if (!confirm_overwrite(identity_file))
3865: exit(1);
1.12 markus 3866:
1.381 djm 3867: /* Determine the passphrase for the private key */
3868: passphrase = private_key_passphrase();
1.12 markus 3869: if (identity_comment) {
3870: strlcpy(comment, identity_comment, sizeof(comment));
3871: } else {
1.172 stevesk 3872: /* Create default comment field for the passphrase. */
1.12 markus 3873: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
3874: }
3875:
3876: /* Save the key with the given passphrase and comment. */
1.381 djm 3877: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 3878: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.421 djm 3879: error_r(r, "Saving key \"%s\" failed", identity_file);
1.381 djm 3880: freezero(passphrase, strlen(passphrase));
1.12 markus 3881: exit(1);
3882: }
1.381 djm 3883: freezero(passphrase, strlen(passphrase));
1.252 djm 3884: sshkey_free(private);
1.12 markus 3885:
1.381 djm 3886: if (!quiet) {
1.387 djm 3887: printf("Your identification has been saved in %s\n",
1.381 djm 3888: identity_file);
3889: }
1.12 markus 3890:
3891: strlcat(identity_file, ".pub", sizeof(identity_file));
1.421 djm 3892: if ((r = sshkey_save_public(public, identity_file, comment)) != 0)
3893: fatal_r(r, "Unable to save public key to %s", identity_file);
1.12 markus 3894:
3895: if (!quiet) {
1.259 djm 3896: fp = sshkey_fingerprint(public, fingerprint_hash,
1.251 djm 3897: SSH_FP_DEFAULT);
1.259 djm 3898: ra = sshkey_fingerprint(public, fingerprint_hash,
1.167 grunk 3899: SSH_FP_RANDOMART);
1.259 djm 3900: if (fp == NULL || ra == NULL)
3901: fatal("sshkey_fingerprint failed");
1.387 djm 3902: printf("Your public key has been saved in %s\n",
1.19 markus 3903: identity_file);
1.12 markus 3904: printf("The key fingerprint is:\n");
1.50 markus 3905: printf("%s %s\n", fp, comment);
1.167 grunk 3906: printf("The key's randomart image is:\n");
3907: printf("%s\n", ra);
1.227 djm 3908: free(ra);
3909: free(fp);
1.12 markus 3910: }
1.19 markus 3911:
1.420 djm 3912: if (sk_attestation_path != NULL)
3913: save_attestation(attest, sk_attestation_path);
3914:
1.395 djm 3915: sshbuf_free(attest);
1.252 djm 3916: sshkey_free(public);
1.395 djm 3917:
1.12 markus 3918: exit(0);
1.1 deraadt 3919: }
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