Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.356
1.356 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.355 2019/10/03 17:07:50 jmc 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>
1.153 stevesk 29: #include <stdio.h>
1.152 stevesk 30: #include <stdlib.h>
1.150 stevesk 31: #include <string.h>
1.149 stevesk 32: #include <unistd.h>
1.253 deraadt 33: #include <limits.h>
1.294 djm 34: #include <locale.h>
1.1 deraadt 35:
36: #include "xmalloc.h"
1.252 djm 37: #include "sshkey.h"
1.19 markus 38: #include "authfile.h"
1.252 djm 39: #include "sshbuf.h"
1.40 markus 40: #include "pathnames.h"
1.41 markus 41: #include "log.h"
1.114 djm 42: #include "misc.h"
1.119 djm 43: #include "match.h"
44: #include "hostfile.h"
1.146 stevesk 45: #include "dns.h"
1.223 djm 46: #include "ssh.h"
1.179 djm 47: #include "ssh2.h"
1.252 djm 48: #include "ssherr.h"
1.223 djm 49: #include "atomicio.h"
50: #include "krl.h"
1.251 djm 51: #include "digest.h"
1.294 djm 52: #include "utf8.h"
1.305 djm 53: #include "authfd.h"
1.344 djm 54: #include "sshsig.h"
1.32 markus 55:
1.177 markus 56: #ifdef ENABLE_PKCS11
57: #include "ssh-pkcs11.h"
1.106 djm 58: #endif
1.66 markus 59:
1.273 djm 60: #ifdef WITH_OPENSSL
61: # define DEFAULT_KEY_TYPE_NAME "rsa"
62: #else
63: # define DEFAULT_KEY_TYPE_NAME "ed25519"
64: #endif
65:
1.328 dtucker 66: /*
1.329 dtucker 67: * Default number of bits in the RSA, DSA and ECDSA keys. These value can be
68: * overridden on the command line.
69: *
70: * These values, with the exception of DSA, provide security equivalent to at
71: * least 128 bits of security according to NIST Special Publication 800-57:
72: * Recommendation for Key Management Part 1 rev 4 section 5.6.1.
73: * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
74: * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
75: * SHA1 we limit the DSA key size 1k bits.
1.328 dtucker 76: */
77: #define DEFAULT_BITS 3072
1.130 markus 78: #define DEFAULT_BITS_DSA 1024
1.203 naddy 79: #define DEFAULT_BITS_ECDSA 256
1.1 deraadt 80:
1.325 djm 81: static int quiet = 0;
1.182 djm 82:
1.8 markus 83: /* Flag indicating that we just want to see the key fingerprint */
1.325 djm 84: static int print_fingerprint = 0;
85: static int print_bubblebabble = 0;
1.8 markus 86:
1.251 djm 87: /* Hash algorithm to use for fingerprints. */
1.325 djm 88: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.251 djm 89:
1.10 markus 90: /* The identity file name, given on the command line or entered by the user. */
1.351 deraadt 91: static char identity_file[PATH_MAX];
1.325 djm 92: static int have_identity = 0;
1.1 deraadt 93:
94: /* This is set to the passphrase if given on the command line. */
1.325 djm 95: static char *identity_passphrase = NULL;
1.1 deraadt 96:
97: /* This is set to the new passphrase if given on the command line. */
1.325 djm 98: static char *identity_new_passphrase = NULL;
1.186 djm 99:
1.179 djm 100: /* Key type when certifying */
1.325 djm 101: static u_int cert_key_type = SSH2_CERT_TYPE_USER;
1.179 djm 102:
103: /* "key ID" of signed key */
1.325 djm 104: static char *cert_key_id = NULL;
1.179 djm 105:
106: /* Comma-separated list of principal names for certifying keys */
1.325 djm 107: static char *cert_principals = NULL;
1.179 djm 108:
109: /* Validity period for certificates */
1.325 djm 110: static u_int64_t cert_valid_from = 0;
111: static u_int64_t cert_valid_to = ~0ULL;
1.179 djm 112:
1.186 djm 113: /* Certificate options */
1.190 djm 114: #define CERTOPT_X_FWD (1)
115: #define CERTOPT_AGENT_FWD (1<<1)
116: #define CERTOPT_PORT_FWD (1<<2)
117: #define CERTOPT_PTY (1<<3)
118: #define CERTOPT_USER_RC (1<<4)
119: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
120: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
1.325 djm 121: static u_int32_t certflags_flags = CERTOPT_DEFAULT;
122: static char *certflags_command = NULL;
123: static char *certflags_src_addr = NULL;
1.179 djm 124:
1.300 djm 125: /* Arbitrary extensions specified by user */
126: struct cert_userext {
127: char *key;
128: char *val;
129: int crit;
130: };
1.325 djm 131: static struct cert_userext *cert_userext;
132: static size_t ncert_userext;
1.300 djm 133:
1.193 djm 134: /* Conversion to/from various formats */
135: enum {
136: FMT_RFC4716,
137: FMT_PKCS8,
138: FMT_PEM
139: } convert_format = FMT_RFC4716;
1.33 markus 140:
1.325 djm 141: static char *key_type_name = NULL;
1.19 markus 142:
1.197 djm 143: /* Load key from this PKCS#11 provider */
1.325 djm 144: static char *pkcs11provider = NULL;
1.193 djm 145:
1.336 djm 146: /* Format for writing private keys */
147: static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
1.237 markus 148:
149: /* Cipher for new-format private keys */
1.336 djm 150: static char *openssh_format_cipher = NULL;
1.237 markus 151:
152: /*
153: * Number of KDF rounds to derive new format keys /
154: * number of primality trials when screening moduli.
155: */
1.325 djm 156: static int rounds = 0;
1.237 markus 157:
1.10 markus 158: /* argv0 */
159: extern char *__progname;
1.1 deraadt 160:
1.325 djm 161: static char hostname[NI_MAXHOST];
1.19 markus 162:
1.274 djm 163: #ifdef WITH_OPENSSL
1.115 djm 164: /* moduli.c */
1.124 avsm 165: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.215 dtucker 166: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
167: unsigned long);
1.274 djm 168: #endif
1.115 djm 169:
1.63 itojun 170: static void
1.255 djm 171: type_bits_valid(int type, const char *name, u_int32_t *bitsp)
1.206 stevesk 172: {
1.269 djm 173: if (type == KEY_UNSPEC)
174: fatal("unknown key type %s", key_type_name);
1.209 djm 175: if (*bitsp == 0) {
1.271 djm 176: #ifdef WITH_OPENSSL
1.339 naddy 177: u_int nid;
178:
179: switch(type) {
180: case KEY_DSA:
1.209 djm 181: *bitsp = DEFAULT_BITS_DSA;
1.339 naddy 182: break;
183: case KEY_ECDSA:
1.255 djm 184: if (name != NULL &&
185: (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
186: *bitsp = sshkey_curve_nid_to_bits(nid);
187: if (*bitsp == 0)
188: *bitsp = DEFAULT_BITS_ECDSA;
1.339 naddy 189: break;
190: case KEY_RSA:
191: *bitsp = DEFAULT_BITS;
192: break;
193: }
1.271 djm 194: #endif
1.206 stevesk 195: }
1.271 djm 196: #ifdef WITH_OPENSSL
1.303 djm 197: switch (type) {
198: case KEY_DSA:
199: if (*bitsp != 1024)
200: fatal("Invalid DSA key length: must be 1024 bits");
201: break;
202: case KEY_RSA:
203: if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
204: fatal("Invalid RSA key length: minimum is %d bits",
205: SSH_RSA_MINIMUM_MODULUS_SIZE);
1.339 naddy 206: else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
207: fatal("Invalid RSA key length: maximum is %d bits",
208: OPENSSL_RSA_MAX_MODULUS_BITS);
1.303 djm 209: break;
210: case KEY_ECDSA:
211: if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
212: fatal("Invalid ECDSA key length: valid lengths are "
213: "256, 384 or 521 bits");
214: }
1.246 markus 215: #endif
1.206 stevesk 216: }
217:
1.343 djm 218: /*
219: * Checks whether a file exists and, if so, asks the user whether they wish
220: * to overwrite it.
221: * Returns nonzero if the file does not already exist or if the user agrees to
222: * overwrite, or zero otherwise.
223: */
224: static int
225: confirm_overwrite(const char *filename)
226: {
227: char yesno[3];
228: struct stat st;
229:
230: if (stat(filename, &st) != 0)
231: return 1;
232: printf("%s already exists.\n", filename);
233: printf("Overwrite (y/n)? ");
234: fflush(stdout);
235: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
236: return 0;
237: if (yesno[0] != 'y' && yesno[0] != 'Y')
238: return 0;
239: return 1;
240: }
241:
1.206 stevesk 242: static void
1.10 markus 243: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 244: {
1.12 markus 245: char buf[1024];
1.35 markus 246: char *name = NULL;
247:
1.92 stevesk 248: if (key_type_name == NULL)
1.40 markus 249: name = _PATH_SSH_CLIENT_ID_RSA;
1.140 deraadt 250: else {
1.252 djm 251: switch (sshkey_type_from_name(key_type_name)) {
1.186 djm 252: case KEY_DSA_CERT:
1.92 stevesk 253: case KEY_DSA:
254: name = _PATH_SSH_CLIENT_ID_DSA;
255: break;
1.200 djm 256: case KEY_ECDSA_CERT:
257: case KEY_ECDSA:
258: name = _PATH_SSH_CLIENT_ID_ECDSA;
259: break;
1.186 djm 260: case KEY_RSA_CERT:
1.92 stevesk 261: case KEY_RSA:
262: name = _PATH_SSH_CLIENT_ID_RSA;
263: break;
1.238 markus 264: case KEY_ED25519:
265: case KEY_ED25519_CERT:
266: name = _PATH_SSH_CLIENT_ID_ED25519;
267: break;
1.313 markus 268: case KEY_XMSS:
269: case KEY_XMSS_CERT:
270: name = _PATH_SSH_CLIENT_ID_XMSS;
271: break;
1.92 stevesk 272: default:
1.269 djm 273: fatal("bad key type");
1.92 stevesk 274: }
1.140 deraadt 275: }
1.269 djm 276: snprintf(identity_file, sizeof(identity_file),
277: "%s/%s", pw->pw_dir, name);
278: printf("%s (%s): ", prompt, identity_file);
279: fflush(stdout);
1.12 markus 280: if (fgets(buf, sizeof(buf), stdin) == NULL)
281: exit(1);
1.162 gilles 282: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 283: if (strcmp(buf, "") != 0)
284: strlcpy(identity_file, buf, sizeof(identity_file));
285: have_identity = 1;
1.7 markus 286: }
287:
1.252 djm 288: static struct sshkey *
1.342 djm 289: load_identity(const char *filename, char **commentp)
1.19 markus 290: {
1.52 markus 291: char *pass;
1.252 djm 292: struct sshkey *prv;
293: int r;
1.52 markus 294:
1.341 djm 295: if (commentp != NULL)
296: *commentp = NULL;
297: if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
1.252 djm 298: return prv;
299: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
300: fatal("Load key \"%s\": %s", filename, ssh_err(r));
301: if (identity_passphrase)
302: pass = xstrdup(identity_passphrase);
303: else
304: pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
1.341 djm 305: r = sshkey_load_private(filename, pass, &prv, commentp);
1.252 djm 306: explicit_bzero(pass, strlen(pass));
307: free(pass);
308: if (r != 0)
309: fatal("Load key \"%s\": %s", filename, ssh_err(r));
1.52 markus 310: return prv;
1.19 markus 311: }
312:
1.32 markus 313: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 314: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 315: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 316: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 317:
1.246 markus 318: #ifdef WITH_OPENSSL
1.63 itojun 319: static void
1.252 djm 320: do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
1.19 markus 321: {
1.337 djm 322: struct sshbuf *b;
323: char comment[61], *b64;
1.252 djm 324: int r;
1.19 markus 325:
1.337 djm 326: if ((b = sshbuf_new()) == NULL)
327: fatal("%s: sshbuf_new failed", __func__);
328: if ((r = sshkey_putb(k, b)) != 0)
1.269 djm 329: fatal("key_to_blob failed: %s", ssh_err(r));
1.337 djm 330: if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
331: fatal("%s: sshbuf_dtob64_string failed", __func__);
332:
1.176 djm 333: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
334: snprintf(comment, sizeof(comment),
335: "%u-bit %s, converted by %s@%s from OpenSSH",
1.252 djm 336: sshkey_size(k), sshkey_type(k),
1.19 markus 337: pw->pw_name, hostname);
1.176 djm 338:
1.337 djm 339: sshkey_free(k);
340: sshbuf_free(b);
341:
1.176 djm 342: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.337 djm 343: fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
1.32 markus 344: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.337 djm 345: free(b64);
1.19 markus 346: exit(0);
347: }
348:
1.63 itojun 349: static void
1.252 djm 350: do_convert_to_pkcs8(struct sshkey *k)
1.193 djm 351: {
1.252 djm 352: switch (sshkey_type_plain(k->type)) {
1.193 djm 353: case KEY_RSA:
354: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
355: fatal("PEM_write_RSA_PUBKEY failed");
356: break;
357: case KEY_DSA:
358: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
359: fatal("PEM_write_DSA_PUBKEY failed");
360: break;
1.200 djm 361: case KEY_ECDSA:
362: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
363: fatal("PEM_write_EC_PUBKEY failed");
364: break;
1.193 djm 365: default:
1.252 djm 366: fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
1.193 djm 367: }
368: exit(0);
369: }
370:
371: static void
1.252 djm 372: do_convert_to_pem(struct sshkey *k)
1.193 djm 373: {
1.252 djm 374: switch (sshkey_type_plain(k->type)) {
1.193 djm 375: case KEY_RSA:
376: if (!PEM_write_RSAPublicKey(stdout, k->rsa))
377: fatal("PEM_write_RSAPublicKey failed");
378: break;
379: default:
1.252 djm 380: fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
1.193 djm 381: }
382: exit(0);
383: }
384:
385: static void
386: do_convert_to(struct passwd *pw)
387: {
1.252 djm 388: struct sshkey *k;
1.193 djm 389: struct stat st;
1.252 djm 390: int r;
1.193 djm 391:
392: if (!have_identity)
393: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 394: if (stat(identity_file, &st) == -1)
1.193 djm 395: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.252 djm 396: if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
1.341 djm 397: k = load_identity(identity_file, NULL);
1.193 djm 398: switch (convert_format) {
399: case FMT_RFC4716:
400: do_convert_to_ssh2(pw, k);
401: break;
402: case FMT_PKCS8:
403: do_convert_to_pkcs8(k);
404: break;
405: case FMT_PEM:
406: do_convert_to_pem(k);
407: break;
408: default:
409: fatal("%s: unknown key format %d", __func__, convert_format);
410: }
411: exit(0);
412: }
413:
1.252 djm 414: /*
415: * This is almost exactly the bignum1 encoding, but with 32 bit for length
416: * instead of 16.
417: */
1.193 djm 418: static void
1.252 djm 419: buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
1.32 markus 420: {
1.252 djm 421: u_int bytes, bignum_bits;
422: int r;
1.53 markus 423:
1.252 djm 424: if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
425: fatal("%s: buffer error: %s", __func__, ssh_err(r));
426: bytes = (bignum_bits + 7) / 8;
427: if (sshbuf_len(b) < bytes)
428: fatal("%s: input buffer too small: need %d have %zu",
429: __func__, bytes, sshbuf_len(b));
430: if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
431: fatal("%s: BN_bin2bn failed", __func__);
432: if ((r = sshbuf_consume(b, bytes)) != 0)
433: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.32 markus 434: }
435:
1.252 djm 436: static struct sshkey *
1.337 djm 437: do_convert_private_ssh2(struct sshbuf *b)
1.32 markus 438: {
1.252 djm 439: struct sshkey *key = NULL;
1.64 markus 440: char *type, *cipher;
1.252 djm 441: u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
442: int r, rlen, ktype;
443: u_int magic, i1, i2, i3, i4;
444: size_t slen;
1.62 markus 445: u_long e;
1.321 djm 446: BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
447: BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
448: BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
449: BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
1.337 djm 450:
1.252 djm 451: if ((r = sshbuf_get_u32(b, &magic)) != 0)
452: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.32 markus 453:
454: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
1.252 djm 455: error("bad magic 0x%x != 0x%x", magic,
456: SSH_COM_PRIVATE_KEY_MAGIC);
1.32 markus 457: return NULL;
458: }
1.252 djm 459: if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
460: (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
461: (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
462: (r = sshbuf_get_u32(b, &i2)) != 0 ||
463: (r = sshbuf_get_u32(b, &i3)) != 0 ||
464: (r = sshbuf_get_u32(b, &i4)) != 0)
465: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.158 stevesk 466: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 467: if (strcmp(cipher, "none") != 0) {
468: error("unsupported cipher %s", cipher);
1.227 djm 469: free(cipher);
470: free(type);
1.32 markus 471: return NULL;
472: }
1.227 djm 473: free(cipher);
1.32 markus 474:
1.53 markus 475: if (strstr(type, "dsa")) {
476: ktype = KEY_DSA;
477: } else if (strstr(type, "rsa")) {
478: ktype = KEY_RSA;
479: } else {
1.227 djm 480: free(type);
1.32 markus 481: return NULL;
482: }
1.322 djm 483: if ((key = sshkey_new(ktype)) == NULL)
484: fatal("sshkey_new failed");
1.227 djm 485: free(type);
1.53 markus 486:
487: switch (key->type) {
488: case KEY_DSA:
1.321 djm 489: if ((dsa_p = BN_new()) == NULL ||
490: (dsa_q = BN_new()) == NULL ||
491: (dsa_g = BN_new()) == NULL ||
492: (dsa_pub_key = BN_new()) == NULL ||
493: (dsa_priv_key = BN_new()) == NULL)
494: fatal("%s: BN_new", __func__);
495: buffer_get_bignum_bits(b, dsa_p);
496: buffer_get_bignum_bits(b, dsa_g);
497: buffer_get_bignum_bits(b, dsa_q);
498: buffer_get_bignum_bits(b, dsa_pub_key);
499: buffer_get_bignum_bits(b, dsa_priv_key);
500: if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
501: fatal("%s: DSA_set0_pqg failed", __func__);
502: dsa_p = dsa_q = dsa_g = NULL; /* transferred */
503: if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
504: fatal("%s: DSA_set0_key failed", __func__);
505: dsa_pub_key = dsa_priv_key = NULL; /* transferred */
1.53 markus 506: break;
507: case KEY_RSA:
1.252 djm 508: if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
509: (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
510: (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
511: fatal("%s: buffer error: %s", __func__, ssh_err(r));
512: e = e1;
1.62 markus 513: debug("e %lx", e);
514: if (e < 30) {
515: e <<= 8;
1.252 djm 516: e += e2;
1.62 markus 517: debug("e %lx", e);
518: e <<= 8;
1.252 djm 519: e += e3;
1.62 markus 520: debug("e %lx", e);
521: }
1.321 djm 522: if ((rsa_e = BN_new()) == NULL)
523: fatal("%s: BN_new", __func__);
524: if (!BN_set_word(rsa_e, e)) {
525: BN_clear_free(rsa_e);
1.252 djm 526: sshkey_free(key);
1.53 markus 527: return NULL;
528: }
1.321 djm 529: if ((rsa_n = BN_new()) == NULL ||
530: (rsa_d = BN_new()) == NULL ||
531: (rsa_p = BN_new()) == NULL ||
532: (rsa_q = BN_new()) == NULL ||
533: (rsa_iqmp = BN_new()) == NULL)
534: fatal("%s: BN_new", __func__);
535: buffer_get_bignum_bits(b, rsa_d);
536: buffer_get_bignum_bits(b, rsa_n);
537: buffer_get_bignum_bits(b, rsa_iqmp);
538: buffer_get_bignum_bits(b, rsa_q);
539: buffer_get_bignum_bits(b, rsa_p);
540: if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
541: fatal("%s: RSA_set0_key failed", __func__);
542: rsa_n = rsa_e = rsa_d = NULL; /* transferred */
543: if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
544: fatal("%s: RSA_set0_factors failed", __func__);
545: rsa_p = rsa_q = NULL; /* transferred */
546: if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
1.252 djm 547: fatal("generate RSA parameters failed: %s", ssh_err(r));
1.321 djm 548: BN_clear_free(rsa_iqmp);
1.53 markus 549: break;
550: }
1.252 djm 551: rlen = sshbuf_len(b);
1.85 deraadt 552: if (rlen != 0)
1.337 djm 553: error("%s: remaining bytes in key blob %d", __func__, rlen);
1.64 markus 554:
555: /* try the key */
1.285 markus 556: if (sshkey_sign(key, &sig, &slen, data, sizeof(data), NULL, 0) != 0 ||
1.309 djm 557: sshkey_verify(key, sig, slen, data, sizeof(data), NULL, 0) != 0) {
1.252 djm 558: sshkey_free(key);
559: free(sig);
560: return NULL;
561: }
1.227 djm 562: free(sig);
1.32 markus 563: return key;
564: }
565:
1.137 dtucker 566: static int
567: get_line(FILE *fp, char *line, size_t len)
568: {
569: int c;
570: size_t pos = 0;
571:
572: line[0] = '\0';
573: while ((c = fgetc(fp)) != EOF) {
1.269 djm 574: if (pos >= len - 1)
575: fatal("input line too long.");
1.140 deraadt 576: switch (c) {
1.137 dtucker 577: case '\r':
578: c = fgetc(fp);
1.269 djm 579: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
580: fatal("unget: %s", strerror(errno));
1.137 dtucker 581: return pos;
582: case '\n':
583: return pos;
584: }
585: line[pos++] = c;
586: line[pos] = '\0';
587: }
1.157 stevesk 588: /* We reached EOF */
589: return -1;
1.137 dtucker 590: }
591:
1.63 itojun 592: static void
1.252 djm 593: do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
1.19 markus 594: {
1.252 djm 595: int r, blen, escaped = 0;
1.98 markus 596: u_int len;
1.137 dtucker 597: char line[1024];
1.337 djm 598: struct sshbuf *buf;
1.19 markus 599: char encoded[8096];
600: FILE *fp;
601:
1.337 djm 602: if ((buf = sshbuf_new()) == NULL)
603: fatal("sshbuf_new failed");
1.191 djm 604: if ((fp = fopen(identity_file, "r")) == NULL)
605: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 606: encoded[0] = '\0';
1.137 dtucker 607: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
1.228 djm 608: if (blen > 0 && line[blen - 1] == '\\')
1.25 markus 609: escaped++;
1.19 markus 610: if (strncmp(line, "----", 4) == 0 ||
611: strstr(line, ": ") != NULL) {
1.32 markus 612: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 613: *private = 1;
1.64 markus 614: if (strstr(line, " END ") != NULL) {
615: break;
616: }
1.60 markus 617: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 618: continue;
619: }
1.25 markus 620: if (escaped) {
621: escaped--;
1.60 markus 622: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 623: continue;
1.19 markus 624: }
625: strlcat(encoded, line, sizeof(encoded));
626: }
1.98 markus 627: len = strlen(encoded);
628: if (((len % 4) == 3) &&
629: (encoded[len-1] == '=') &&
630: (encoded[len-2] == '=') &&
631: (encoded[len-3] == '='))
632: encoded[len-3] = '\0';
1.337 djm 633: if ((r = sshbuf_b64tod(buf, encoded)) != 0)
634: fatal("%s: base64 decoding failed: %s", __func__, ssh_err(r));
1.252 djm 635: if (*private)
1.337 djm 636: *k = do_convert_private_ssh2(buf);
637: else if ((r = sshkey_fromb(buf, k)) != 0)
1.269 djm 638: fatal("decode blob failed: %s", ssh_err(r));
1.356 ! djm 639: sshbuf_free(buf);
1.193 djm 640: fclose(fp);
641: }
642:
643: static void
1.252 djm 644: do_convert_from_pkcs8(struct sshkey **k, int *private)
1.193 djm 645: {
646: EVP_PKEY *pubkey;
647: FILE *fp;
648:
649: if ((fp = fopen(identity_file, "r")) == NULL)
650: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
651: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
652: fatal("%s: %s is not a recognised public key format", __func__,
653: identity_file);
654: }
655: fclose(fp);
1.321 djm 656: switch (EVP_PKEY_base_id(pubkey)) {
1.193 djm 657: case EVP_PKEY_RSA:
1.252 djm 658: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
659: fatal("sshkey_new failed");
1.193 djm 660: (*k)->type = KEY_RSA;
661: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
662: break;
663: case EVP_PKEY_DSA:
1.252 djm 664: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
665: fatal("sshkey_new failed");
1.193 djm 666: (*k)->type = KEY_DSA;
667: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
668: break;
1.200 djm 669: case EVP_PKEY_EC:
1.252 djm 670: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
671: fatal("sshkey_new failed");
1.200 djm 672: (*k)->type = KEY_ECDSA;
673: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
1.252 djm 674: (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
1.200 djm 675: break;
1.193 djm 676: default:
677: fatal("%s: unsupported pubkey type %d", __func__,
1.321 djm 678: EVP_PKEY_base_id(pubkey));
1.193 djm 679: }
680: EVP_PKEY_free(pubkey);
681: return;
682: }
683:
684: static void
1.252 djm 685: do_convert_from_pem(struct sshkey **k, int *private)
1.193 djm 686: {
687: FILE *fp;
688: RSA *rsa;
689:
690: if ((fp = fopen(identity_file, "r")) == NULL)
691: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
692: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
1.252 djm 693: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
694: fatal("sshkey_new failed");
1.193 djm 695: (*k)->type = KEY_RSA;
696: (*k)->rsa = rsa;
697: fclose(fp);
698: return;
699: }
700: fatal("%s: unrecognised raw private key format", __func__);
701: }
702:
703: static void
704: do_convert_from(struct passwd *pw)
705: {
1.252 djm 706: struct sshkey *k = NULL;
707: int r, private = 0, ok = 0;
1.193 djm 708: struct stat st;
709:
710: if (!have_identity)
711: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 712: if (stat(identity_file, &st) == -1)
1.193 djm 713: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
714:
715: switch (convert_format) {
716: case FMT_RFC4716:
717: do_convert_from_ssh2(pw, &k, &private);
718: break;
719: case FMT_PKCS8:
720: do_convert_from_pkcs8(&k, &private);
721: break;
722: case FMT_PEM:
723: do_convert_from_pem(&k, &private);
724: break;
725: default:
726: fatal("%s: unknown key format %d", __func__, convert_format);
727: }
728:
1.260 djm 729: if (!private) {
1.252 djm 730: if ((r = sshkey_write(k, stdout)) == 0)
731: ok = 1;
1.193 djm 732: if (ok)
733: fprintf(stdout, "\n");
1.260 djm 734: } else {
1.193 djm 735: switch (k->type) {
736: case KEY_DSA:
737: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
738: NULL, 0, NULL, NULL);
739: break;
1.200 djm 740: case KEY_ECDSA:
741: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
742: NULL, 0, NULL, NULL);
743: break;
1.193 djm 744: case KEY_RSA:
745: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
746: NULL, 0, NULL, NULL);
747: break;
748: default:
749: fatal("%s: unsupported key type %s", __func__,
1.252 djm 750: sshkey_type(k));
1.193 djm 751: }
752: }
753:
1.269 djm 754: if (!ok)
755: fatal("key write failed");
1.252 djm 756: sshkey_free(k);
1.19 markus 757: exit(0);
758: }
1.246 markus 759: #endif
1.19 markus 760:
1.63 itojun 761: static void
1.19 markus 762: do_print_public(struct passwd *pw)
763: {
1.252 djm 764: struct sshkey *prv;
1.19 markus 765: struct stat st;
1.252 djm 766: int r;
1.341 djm 767: char *comment = NULL;
1.19 markus 768:
769: if (!have_identity)
770: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 771: if (stat(identity_file, &st) == -1)
1.269 djm 772: fatal("%s: %s", identity_file, strerror(errno));
1.341 djm 773: prv = load_identity(identity_file, &comment);
1.252 djm 774: if ((r = sshkey_write(prv, stdout)) != 0)
1.304 markus 775: error("sshkey_write failed: %s", ssh_err(r));
1.252 djm 776: sshkey_free(prv);
1.341 djm 777: if (comment != NULL && *comment != '\0')
778: fprintf(stdout, " %s", comment);
1.19 markus 779: fprintf(stdout, "\n");
1.341 djm 780: free(comment);
1.19 markus 781: exit(0);
782: }
783:
1.66 markus 784: static void
1.197 djm 785: do_download(struct passwd *pw)
1.75 markus 786: {
1.177 markus 787: #ifdef ENABLE_PKCS11
1.252 djm 788: struct sshkey **keys = NULL;
1.177 markus 789: int i, nkeys;
1.252 djm 790: enum sshkey_fp_rep rep;
1.251 djm 791: int fptype;
1.221 djm 792: char *fp, *ra;
1.222 djm 793:
1.251 djm 794: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
795: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.75 markus 796:
1.327 benno 797: pkcs11_init(1);
1.177 markus 798: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
799: if (nkeys <= 0)
800: fatal("cannot read public key from pkcs11");
801: for (i = 0; i < nkeys; i++) {
1.221 djm 802: if (print_fingerprint) {
1.252 djm 803: fp = sshkey_fingerprint(keys[i], fptype, rep);
804: ra = sshkey_fingerprint(keys[i], fingerprint_hash,
1.221 djm 805: SSH_FP_RANDOMART);
1.259 djm 806: if (fp == NULL || ra == NULL)
807: fatal("%s: sshkey_fingerprint fail", __func__);
1.252 djm 808: printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
809: fp, sshkey_type(keys[i]));
1.325 djm 810: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.221 djm 811: printf("%s\n", ra);
1.227 djm 812: free(ra);
813: free(fp);
1.221 djm 814: } else {
1.252 djm 815: (void) sshkey_write(keys[i], stdout); /* XXX check */
1.221 djm 816: fprintf(stdout, "\n");
817: }
1.252 djm 818: sshkey_free(keys[i]);
1.97 markus 819: }
1.227 djm 820: free(keys);
1.177 markus 821: pkcs11_terminate();
1.75 markus 822: exit(0);
1.177 markus 823: #else
824: fatal("no pkcs11 support");
825: #endif /* ENABLE_PKCS11 */
1.75 markus 826: }
1.66 markus 827:
1.279 djm 828: static struct sshkey *
829: try_read_key(char **cpp)
830: {
831: struct sshkey *ret;
832: int r;
833:
834: if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
835: fatal("sshkey_new failed");
836: if ((r = sshkey_read(ret, cpp)) == 0)
837: return ret;
838: /* Not a key */
839: sshkey_free(ret);
840: return NULL;
841: }
842:
1.63 itojun 843: static void
1.279 djm 844: fingerprint_one_key(const struct sshkey *public, const char *comment)
1.8 markus 845: {
1.279 djm 846: char *fp = NULL, *ra = NULL;
1.252 djm 847: enum sshkey_fp_rep rep;
1.251 djm 848: int fptype;
1.12 markus 849:
1.251 djm 850: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
851: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.279 djm 852: fp = sshkey_fingerprint(public, fptype, rep);
853: ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
854: if (fp == NULL || ra == NULL)
855: fatal("%s: sshkey_fingerprint failed", __func__);
1.294 djm 856: mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
1.279 djm 857: comment ? comment : "no comment", sshkey_type(public));
1.325 djm 858: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.279 djm 859: printf("%s\n", ra);
860: free(ra);
861: free(fp);
862: }
863:
864: static void
865: fingerprint_private(const char *path)
866: {
867: struct stat st;
868: char *comment = NULL;
869: struct sshkey *public = NULL;
870: int r;
871:
1.333 deraadt 872: if (stat(identity_file, &st) == -1)
1.279 djm 873: fatal("%s: %s", path, strerror(errno));
1.280 djm 874: if ((r = sshkey_load_public(path, &public, &comment)) != 0) {
875: debug("load public \"%s\": %s", path, ssh_err(r));
876: if ((r = sshkey_load_private(path, NULL,
877: &public, &comment)) != 0) {
878: debug("load private \"%s\": %s", path, ssh_err(r));
879: fatal("%s is not a key file.", path);
880: }
881: }
882:
1.279 djm 883: fingerprint_one_key(public, comment);
884: sshkey_free(public);
885: free(comment);
886: }
887:
888: static void
889: do_fingerprint(struct passwd *pw)
890: {
891: FILE *f;
892: struct sshkey *public = NULL;
1.317 markus 893: char *comment = NULL, *cp, *ep, *line = NULL;
894: size_t linesize = 0;
1.279 djm 895: int i, invalid = 1;
896: const char *path;
1.289 djm 897: u_long lnum = 0;
1.279 djm 898:
1.12 markus 899: if (!have_identity)
900: ask_filename(pw, "Enter file in which the key is");
1.279 djm 901: path = identity_file;
1.15 markus 902:
1.279 djm 903: if (strcmp(identity_file, "-") == 0) {
904: f = stdin;
905: path = "(stdin)";
906: } else if ((f = fopen(path, "r")) == NULL)
907: fatal("%s: %s: %s", __progname, path, strerror(errno));
908:
1.317 markus 909: while (getline(&line, &linesize, f) != -1) {
910: lnum++;
1.279 djm 911: cp = line;
912: cp[strcspn(cp, "\n")] = '\0';
913: /* Trim leading space and comments */
914: cp = line + strspn(line, " \t");
915: if (*cp == '#' || *cp == '\0')
916: continue;
1.191 djm 917:
1.279 djm 918: /*
919: * Input may be plain keys, private keys, authorized_keys
920: * or known_hosts.
921: */
922:
923: /*
924: * Try private keys first. Assume a key is private if
925: * "SSH PRIVATE KEY" appears on the first line and we're
926: * not reading from stdin (XXX support private keys on stdin).
927: */
928: if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
1.280 djm 929: strstr(cp, "PRIVATE KEY") != NULL) {
1.317 markus 930: free(line);
1.279 djm 931: fclose(f);
932: fingerprint_private(path);
933: exit(0);
934: }
935:
936: /*
937: * If it's not a private key, then this must be prepared to
938: * accept a public key prefixed with a hostname or options.
939: * Try a bare key first, otherwise skip the leading stuff.
940: */
941: if ((public = try_read_key(&cp)) == NULL) {
942: i = strtol(cp, &ep, 10);
943: if (i == 0 || ep == NULL ||
944: (*ep != ' ' && *ep != '\t')) {
945: int quoted = 0;
946:
947: comment = cp;
948: for (; *cp && (quoted || (*cp != ' ' &&
949: *cp != '\t')); cp++) {
950: if (*cp == '\\' && cp[1] == '"')
951: cp++; /* Skip both */
952: else if (*cp == '"')
953: quoted = !quoted;
954: }
955: if (!*cp)
956: continue;
957: *cp++ = '\0';
958: }
1.191 djm 959: }
1.279 djm 960: /* Retry after parsing leading hostname/key options */
961: if (public == NULL && (public = try_read_key(&cp)) == NULL) {
1.289 djm 962: debug("%s:%lu: not a public key", path, lnum);
1.191 djm 963: continue;
964: }
965:
1.279 djm 966: /* Find trailing comment, if any */
967: for (; *cp == ' ' || *cp == '\t'; cp++)
1.191 djm 968: ;
1.279 djm 969: if (*cp != '\0' && *cp != '#')
1.191 djm 970: comment = cp;
1.279 djm 971:
972: fingerprint_one_key(public, comment);
1.252 djm 973: sshkey_free(public);
1.279 djm 974: invalid = 0; /* One good key in the file is sufficient */
1.15 markus 975: }
1.191 djm 976: fclose(f);
1.317 markus 977: free(line);
1.191 djm 978:
1.269 djm 979: if (invalid)
1.279 djm 980: fatal("%s is not a public key file.", path);
1.12 markus 981: exit(0);
1.8 markus 982: }
983:
1.119 djm 984: static void
1.206 stevesk 985: do_gen_all_hostkeys(struct passwd *pw)
986: {
987: struct {
988: char *key_type;
989: char *key_type_display;
990: char *path;
991: } key_types[] = {
1.267 djm 992: #ifdef WITH_OPENSSL
1.206 stevesk 993: { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
994: { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE },
995: { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
1.267 djm 996: #endif /* WITH_OPENSSL */
1.238 markus 997: { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
1.313 markus 998: #ifdef WITH_XMSS
999: { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
1000: #endif /* WITH_XMSS */
1.206 stevesk 1001: { NULL, NULL, NULL }
1002: };
1003:
1.340 dtucker 1004: u_int32_t bits = 0;
1.206 stevesk 1005: int first = 0;
1006: struct stat st;
1.252 djm 1007: struct sshkey *private, *public;
1.307 djm 1008: char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
1.252 djm 1009: int i, type, fd, r;
1.206 stevesk 1010: FILE *f;
1011:
1012: for (i = 0; key_types[i].key_type; i++) {
1.307 djm 1013: public = private = NULL;
1014: prv_tmp = pub_tmp = prv_file = pub_file = NULL;
1015:
1016: xasprintf(&prv_file, "%s%s",
1017: identity_file, key_types[i].path);
1018:
1019: /* Check whether private key exists and is not zero-length */
1020: if (stat(prv_file, &st) == 0) {
1021: if (st.st_size != 0)
1022: goto next;
1023: } else if (errno != ENOENT) {
1.269 djm 1024: error("Could not stat %s: %s", key_types[i].path,
1.206 stevesk 1025: strerror(errno));
1.307 djm 1026: goto failnext;
1.206 stevesk 1027: }
1028:
1.307 djm 1029: /*
1030: * Private key doesn't exist or is invalid; proceed with
1031: * key generation.
1032: */
1033: xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
1034: identity_file, key_types[i].path);
1035: xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
1036: identity_file, key_types[i].path);
1037: xasprintf(&pub_file, "%s%s.pub",
1038: identity_file, key_types[i].path);
1039:
1.206 stevesk 1040: if (first == 0) {
1041: first = 1;
1042: printf("%s: generating new host keys: ", __progname);
1043: }
1044: printf("%s ", key_types[i].key_type_display);
1045: fflush(stdout);
1.252 djm 1046: type = sshkey_type_from_name(key_types[i].key_type);
1.307 djm 1047: if ((fd = mkstemp(prv_tmp)) == -1) {
1048: error("Could not save your public key in %s: %s",
1049: prv_tmp, strerror(errno));
1050: goto failnext;
1051: }
1052: close(fd); /* just using mkstemp() to generate/reserve a name */
1.206 stevesk 1053: bits = 0;
1.255 djm 1054: type_bits_valid(type, NULL, &bits);
1.252 djm 1055: if ((r = sshkey_generate(type, bits, &private)) != 0) {
1.304 markus 1056: error("sshkey_generate failed: %s", ssh_err(r));
1.307 djm 1057: goto failnext;
1.206 stevesk 1058: }
1.252 djm 1059: if ((r = sshkey_from_private(private, &public)) != 0)
1060: fatal("sshkey_from_private failed: %s", ssh_err(r));
1.206 stevesk 1061: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1062: hostname);
1.307 djm 1063: if ((r = sshkey_save_private(private, prv_tmp, "",
1.336 djm 1064: comment, private_key_format, openssh_format_cipher,
1065: rounds)) != 0) {
1.269 djm 1066: error("Saving key \"%s\" failed: %s",
1.307 djm 1067: prv_tmp, ssh_err(r));
1068: goto failnext;
1.206 stevesk 1069: }
1.307 djm 1070: if ((fd = mkstemp(pub_tmp)) == -1) {
1071: error("Could not save your public key in %s: %s",
1072: pub_tmp, strerror(errno));
1073: goto failnext;
1.206 stevesk 1074: }
1.307 djm 1075: (void)fchmod(fd, 0644);
1.206 stevesk 1076: f = fdopen(fd, "w");
1077: if (f == NULL) {
1.307 djm 1078: error("fdopen %s failed: %s", pub_tmp, strerror(errno));
1.250 doug 1079: close(fd);
1.307 djm 1080: goto failnext;
1.206 stevesk 1081: }
1.254 djm 1082: if ((r = sshkey_write(public, f)) != 0) {
1.269 djm 1083: error("write key failed: %s", ssh_err(r));
1.250 doug 1084: fclose(f);
1.307 djm 1085: goto failnext;
1086: }
1087: fprintf(f, " %s\n", comment);
1088: if (ferror(f) != 0) {
1089: error("write key failed: %s", strerror(errno));
1090: fclose(f);
1091: goto failnext;
1092: }
1093: if (fclose(f) != 0) {
1094: error("key close failed: %s", strerror(errno));
1095: goto failnext;
1096: }
1097:
1098: /* Rename temporary files to their permanent locations. */
1099: if (rename(pub_tmp, pub_file) != 0) {
1100: error("Unable to move %s into position: %s",
1101: pub_file, strerror(errno));
1102: goto failnext;
1103: }
1104: if (rename(prv_tmp, prv_file) != 0) {
1105: error("Unable to move %s into position: %s",
1106: key_types[i].path, strerror(errno));
1107: failnext:
1.206 stevesk 1108: first = 0;
1.307 djm 1109: goto next;
1.206 stevesk 1110: }
1.307 djm 1111: next:
1112: sshkey_free(private);
1.252 djm 1113: sshkey_free(public);
1.307 djm 1114: free(prv_tmp);
1115: free(pub_tmp);
1116: free(prv_file);
1117: free(pub_file);
1.206 stevesk 1118: }
1119: if (first != 0)
1120: printf("\n");
1121: }
1122:
1.256 djm 1123: struct known_hosts_ctx {
1.257 djm 1124: const char *host; /* Hostname searched for in find/delete case */
1125: FILE *out; /* Output file, stdout for find_hosts case */
1126: int has_unhashed; /* When hashing, original had unhashed hosts */
1127: int found_key; /* For find/delete, host was found */
1128: int invalid; /* File contained invalid items; don't delete */
1.325 djm 1129: int hash_hosts; /* Hash hostnames as we go */
1130: int find_host; /* Search for specific hostname */
1131: int delete_host; /* Delete host from known_hosts */
1.256 djm 1132: };
1133:
1134: static int
1135: known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1.119 djm 1136: {
1.256 djm 1137: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1138: char *hashed, *cp, *hosts, *ohosts;
1139: int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1.298 dtucker 1140: int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1.256 djm 1141:
1.262 djm 1142: switch (l->status) {
1143: case HKF_STATUS_OK:
1144: case HKF_STATUS_MATCHED:
1145: /*
1146: * Don't hash hosts already already hashed, with wildcard
1147: * characters or a CA/revocation marker.
1148: */
1.296 djm 1149: if (was_hashed || has_wild || l->marker != MRK_NONE) {
1.262 djm 1150: fprintf(ctx->out, "%s\n", l->line);
1.325 djm 1151: if (has_wild && !ctx->find_host) {
1.297 dtucker 1152: logit("%s:%lu: ignoring host name "
1.269 djm 1153: "with wildcard: %.64s", l->path,
1.262 djm 1154: l->linenum, l->hosts);
1155: }
1156: return 0;
1157: }
1158: /*
1159: * Split any comma-separated hostnames from the host list,
1160: * hash and store separately.
1161: */
1162: ohosts = hosts = xstrdup(l->hosts);
1163: while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1.299 djm 1164: lowercase(cp);
1.262 djm 1165: if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1166: fatal("hash_host failed");
1167: fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1168: ctx->has_unhashed = 1;
1169: }
1170: free(ohosts);
1171: return 0;
1172: case HKF_STATUS_INVALID:
1173: /* Retain invalid lines, but mark file as invalid. */
1.256 djm 1174: ctx->invalid = 1;
1.297 dtucker 1175: logit("%s:%lu: invalid line", l->path, l->linenum);
1.262 djm 1176: /* FALLTHROUGH */
1177: default:
1.256 djm 1178: fprintf(ctx->out, "%s\n", l->line);
1179: return 0;
1180: }
1.262 djm 1181: /* NOTREACHED */
1182: return -1;
1.256 djm 1183: }
1184:
1185: static int
1186: known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1187: {
1188: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1.272 djm 1189: enum sshkey_fp_rep rep;
1190: int fptype;
1.338 djm 1191: char *fp = NULL, *ra = NULL;
1.272 djm 1192:
1193: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1194: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.256 djm 1195:
1.262 djm 1196: if (l->status == HKF_STATUS_MATCHED) {
1.325 djm 1197: if (ctx->delete_host) {
1.256 djm 1198: if (l->marker != MRK_NONE) {
1199: /* Don't remove CA and revocation lines */
1200: fprintf(ctx->out, "%s\n", l->line);
1201: } else {
1202: /*
1203: * Hostname matches and has no CA/revoke
1204: * marker, delete it by *not* writing the
1205: * line to ctx->out.
1206: */
1207: ctx->found_key = 1;
1208: if (!quiet)
1.297 dtucker 1209: printf("# Host %s found: line %lu\n",
1.256 djm 1210: ctx->host, l->linenum);
1211: }
1212: return 0;
1.325 djm 1213: } else if (ctx->find_host) {
1.256 djm 1214: ctx->found_key = 1;
1215: if (!quiet) {
1.297 dtucker 1216: printf("# Host %s found: line %lu %s\n",
1.256 djm 1217: ctx->host,
1218: l->linenum, l->marker == MRK_CA ? "CA" :
1219: (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1220: }
1.325 djm 1221: if (ctx->hash_hosts)
1.256 djm 1222: known_hosts_hash(l, ctx);
1.272 djm 1223: else if (print_fingerprint) {
1224: fp = sshkey_fingerprint(l->key, fptype, rep);
1.338 djm 1225: ra = sshkey_fingerprint(l->key,
1226: fingerprint_hash, SSH_FP_RANDOMART);
1227: if (fp == NULL || ra == NULL)
1228: fatal("%s: sshkey_fingerprint failed",
1229: __func__);
1.294 djm 1230: mprintf("%s %s %s %s\n", ctx->host,
1.272 djm 1231: sshkey_type(l->key), fp, l->comment);
1.338 djm 1232: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1233: printf("%s\n", ra);
1234: free(ra);
1.272 djm 1235: free(fp);
1236: } else
1.256 djm 1237: fprintf(ctx->out, "%s\n", l->line);
1238: return 0;
1239: }
1.325 djm 1240: } else if (ctx->delete_host) {
1.256 djm 1241: /* Retain non-matching hosts when deleting */
1242: if (l->status == HKF_STATUS_INVALID) {
1243: ctx->invalid = 1;
1.297 dtucker 1244: logit("%s:%lu: invalid line", l->path, l->linenum);
1.256 djm 1245: }
1246: fprintf(ctx->out, "%s\n", l->line);
1.166 djm 1247: }
1.256 djm 1248: return 0;
1.119 djm 1249: }
1250:
1251: static void
1.325 djm 1252: do_known_hosts(struct passwd *pw, const char *name, int find_host,
1253: int delete_host, int hash_hosts)
1.119 djm 1254: {
1.258 deraadt 1255: char *cp, tmp[PATH_MAX], old[PATH_MAX];
1.257 djm 1256: int r, fd, oerrno, inplace = 0;
1.256 djm 1257: struct known_hosts_ctx ctx;
1.272 djm 1258: u_int foreach_options;
1.119 djm 1259:
1260: if (!have_identity) {
1261: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1262: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1263: sizeof(identity_file))
1264: fatal("Specified known hosts path too long");
1.227 djm 1265: free(cp);
1.119 djm 1266: have_identity = 1;
1267: }
1268:
1.256 djm 1269: memset(&ctx, 0, sizeof(ctx));
1270: ctx.out = stdout;
1271: ctx.host = name;
1.325 djm 1272: ctx.hash_hosts = hash_hosts;
1273: ctx.find_host = find_host;
1274: ctx.delete_host = delete_host;
1.256 djm 1275:
1.119 djm 1276: /*
1277: * Find hosts goes to stdout, hash and deletions happen in-place
1278: * A corner case is ssh-keygen -HF foo, which should go to stdout
1279: */
1280: if (!find_host && (hash_hosts || delete_host)) {
1281: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1282: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1283: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1284: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1285: fatal("known_hosts path too long");
1286: umask(077);
1.256 djm 1287: if ((fd = mkstemp(tmp)) == -1)
1.119 djm 1288: fatal("mkstemp: %s", strerror(errno));
1.256 djm 1289: if ((ctx.out = fdopen(fd, "w")) == NULL) {
1290: oerrno = errno;
1.119 djm 1291: unlink(tmp);
1.256 djm 1292: fatal("fdopen: %s", strerror(oerrno));
1.119 djm 1293: }
1.257 djm 1294: inplace = 1;
1.119 djm 1295: }
1.256 djm 1296: /* XXX support identity_file == "-" for stdin */
1.272 djm 1297: foreach_options = find_host ? HKF_WANT_MATCH : 0;
1298: foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1.316 djm 1299: if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
1.315 djm 1300: known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
1301: foreach_options)) != 0) {
1.284 deraadt 1302: if (inplace)
1303: unlink(tmp);
1.256 djm 1304: fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r));
1.284 deraadt 1305: }
1.119 djm 1306:
1.257 djm 1307: if (inplace)
1.256 djm 1308: fclose(ctx.out);
1.119 djm 1309:
1.256 djm 1310: if (ctx.invalid) {
1.269 djm 1311: error("%s is not a valid known_hosts file.", identity_file);
1.257 djm 1312: if (inplace) {
1.269 djm 1313: error("Not replacing existing known_hosts "
1314: "file because of errors");
1.119 djm 1315: unlink(tmp);
1316: }
1317: exit(1);
1.256 djm 1318: } else if (delete_host && !ctx.found_key) {
1.269 djm 1319: logit("Host %s not found in %s", name, identity_file);
1.277 djm 1320: if (inplace)
1321: unlink(tmp);
1.257 djm 1322: } else if (inplace) {
1.119 djm 1323: /* Backup existing file */
1324: if (unlink(old) == -1 && errno != ENOENT)
1325: fatal("unlink %.100s: %s", old, strerror(errno));
1326: if (link(identity_file, old) == -1)
1327: fatal("link %.100s to %.100s: %s", identity_file, old,
1328: strerror(errno));
1329: /* Move new one into place */
1330: if (rename(tmp, identity_file) == -1) {
1331: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1332: strerror(errno));
1333: unlink(tmp);
1334: unlink(old);
1335: exit(1);
1336: }
1337:
1.269 djm 1338: printf("%s updated.\n", identity_file);
1339: printf("Original contents retained as %s\n", old);
1.256 djm 1340: if (ctx.has_unhashed) {
1.269 djm 1341: logit("WARNING: %s contains unhashed entries", old);
1342: logit("Delete this file to ensure privacy "
1343: "of hostnames");
1.119 djm 1344: }
1345: }
1346:
1.256 djm 1347: exit (find_host && !ctx.found_key);
1.119 djm 1348: }
1349:
1.13 deraadt 1350: /*
1351: * Perform changing a passphrase. The argument is the passwd structure
1352: * for the current user.
1353: */
1.63 itojun 1354: static void
1.7 markus 1355: do_change_passphrase(struct passwd *pw)
1356: {
1.12 markus 1357: char *comment;
1358: char *old_passphrase, *passphrase1, *passphrase2;
1359: struct stat st;
1.252 djm 1360: struct sshkey *private;
1361: int r;
1.12 markus 1362:
1363: if (!have_identity)
1364: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1365: if (stat(identity_file, &st) == -1)
1.269 djm 1366: fatal("%s: %s", identity_file, strerror(errno));
1.12 markus 1367: /* Try to load the file with empty passphrase. */
1.252 djm 1368: r = sshkey_load_private(identity_file, "", &private, &comment);
1369: if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.12 markus 1370: if (identity_passphrase)
1371: old_passphrase = xstrdup(identity_passphrase);
1372: else
1.65 markus 1373: old_passphrase =
1374: read_passphrase("Enter old passphrase: ",
1375: RP_ALLOW_STDIN);
1.252 djm 1376: r = sshkey_load_private(identity_file, old_passphrase,
1377: &private, &comment);
1.240 djm 1378: explicit_bzero(old_passphrase, strlen(old_passphrase));
1.227 djm 1379: free(old_passphrase);
1.252 djm 1380: if (r != 0)
1381: goto badkey;
1382: } else if (r != 0) {
1383: badkey:
1.269 djm 1384: fatal("Failed to load key %s: %s", identity_file, ssh_err(r));
1.12 markus 1385: }
1.266 djm 1386: if (comment)
1.294 djm 1387: mprintf("Key has comment '%s'\n", comment);
1.12 markus 1388:
1389: /* Ask the new passphrase (twice). */
1390: if (identity_new_passphrase) {
1391: passphrase1 = xstrdup(identity_new_passphrase);
1392: passphrase2 = NULL;
1393: } else {
1394: passphrase1 =
1.65 markus 1395: read_passphrase("Enter new passphrase (empty for no "
1396: "passphrase): ", RP_ALLOW_STDIN);
1397: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1398: RP_ALLOW_STDIN);
1.12 markus 1399:
1400: /* Verify that they are the same. */
1401: if (strcmp(passphrase1, passphrase2) != 0) {
1.240 djm 1402: explicit_bzero(passphrase1, strlen(passphrase1));
1403: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1404: free(passphrase1);
1405: free(passphrase2);
1.12 markus 1406: printf("Pass phrases do not match. Try again.\n");
1407: exit(1);
1408: }
1409: /* Destroy the other copy. */
1.240 djm 1410: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1411: free(passphrase2);
1.12 markus 1412: }
1413:
1414: /* Save the file using the new passphrase. */
1.252 djm 1415: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 1416: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.269 djm 1417: error("Saving key \"%s\" failed: %s.",
1.252 djm 1418: identity_file, ssh_err(r));
1.240 djm 1419: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 1420: free(passphrase1);
1.252 djm 1421: sshkey_free(private);
1.227 djm 1422: free(comment);
1.12 markus 1423: exit(1);
1424: }
1425: /* Destroy the passphrase and the copy of the key in memory. */
1.240 djm 1426: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 1427: free(passphrase1);
1.252 djm 1428: sshkey_free(private); /* Destroys contents */
1.227 djm 1429: free(comment);
1.1 deraadt 1430:
1.12 markus 1431: printf("Your identification has been saved with the new passphrase.\n");
1432: exit(0);
1.1 deraadt 1433: }
1434:
1.105 jakob 1435: /*
1436: * Print the SSHFP RR.
1437: */
1.138 jakob 1438: static int
1.325 djm 1439: do_print_resource_record(struct passwd *pw, char *fname, char *hname,
1440: int print_generic)
1.105 jakob 1441: {
1.252 djm 1442: struct sshkey *public;
1.105 jakob 1443: char *comment = NULL;
1444: struct stat st;
1.252 djm 1445: int r;
1.105 jakob 1446:
1.138 jakob 1447: if (fname == NULL)
1.229 djm 1448: fatal("%s: no filename", __func__);
1.333 deraadt 1449: if (stat(fname, &st) == -1) {
1.138 jakob 1450: if (errno == ENOENT)
1451: return 0;
1.269 djm 1452: fatal("%s: %s", fname, strerror(errno));
1.105 jakob 1453: }
1.269 djm 1454: if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1455: fatal("Failed to read v2 public key from \"%s\": %s.",
1.252 djm 1456: fname, ssh_err(r));
1457: export_dns_rr(hname, public, stdout, print_generic);
1458: sshkey_free(public);
1459: free(comment);
1460: return 1;
1.105 jakob 1461: }
1462:
1.13 deraadt 1463: /*
1464: * Change the comment of a private key file.
1465: */
1.63 itojun 1466: static void
1.325 djm 1467: do_change_comment(struct passwd *pw, const char *identity_comment)
1.1 deraadt 1468: {
1.46 deraadt 1469: char new_comment[1024], *comment, *passphrase;
1.252 djm 1470: struct sshkey *private;
1471: struct sshkey *public;
1.12 markus 1472: struct stat st;
1473: FILE *f;
1.252 djm 1474: int r, fd;
1.12 markus 1475:
1476: if (!have_identity)
1477: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1478: if (stat(identity_file, &st) == -1)
1.269 djm 1479: fatal("%s: %s", identity_file, strerror(errno));
1.252 djm 1480: if ((r = sshkey_load_private(identity_file, "",
1481: &private, &comment)) == 0)
1482: passphrase = xstrdup("");
1.269 djm 1483: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1484: fatal("Cannot load private key \"%s\": %s.",
1.252 djm 1485: identity_file, ssh_err(r));
1.269 djm 1486: else {
1.12 markus 1487: if (identity_passphrase)
1488: passphrase = xstrdup(identity_passphrase);
1489: else if (identity_new_passphrase)
1490: passphrase = xstrdup(identity_new_passphrase);
1491: else
1.65 markus 1492: passphrase = read_passphrase("Enter passphrase: ",
1493: RP_ALLOW_STDIN);
1.12 markus 1494: /* Try to load using the passphrase. */
1.252 djm 1495: if ((r = sshkey_load_private(identity_file, passphrase,
1496: &private, &comment)) != 0) {
1.240 djm 1497: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1498: free(passphrase);
1.269 djm 1499: fatal("Cannot load private key \"%s\": %s.",
1.252 djm 1500: identity_file, ssh_err(r));
1.12 markus 1501: }
1502: }
1.283 halex 1503:
1.313 markus 1504: if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
1.336 djm 1505: private_key_format != SSHKEY_PRIVATE_OPENSSH) {
1.302 djm 1506: error("Comments are only supported for keys stored in "
1.283 halex 1507: "the new format (-o).");
1.268 tobias 1508: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1509: sshkey_free(private);
1.52 markus 1510: exit(1);
1.86 deraadt 1511: }
1.293 millert 1512: if (comment)
1.330 lum 1513: printf("Old comment: %s\n", comment);
1.293 millert 1514: else
1.330 lum 1515: printf("No existing comment\n");
1.12 markus 1516:
1517: if (identity_comment) {
1518: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1519: } else {
1.330 lum 1520: printf("New comment: ");
1.12 markus 1521: fflush(stdout);
1522: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1.240 djm 1523: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1524: sshkey_free(private);
1.12 markus 1525: exit(1);
1526: }
1.162 gilles 1527: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1528: }
1.330 lum 1529: if (comment != NULL && strcmp(comment, new_comment) == 0) {
1530: printf("No change to comment\n");
1531: free(passphrase);
1532: sshkey_free(private);
1533: free(comment);
1534: exit(0);
1535: }
1.12 markus 1536:
1537: /* Save the file using the new passphrase. */
1.252 djm 1538: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 1539: new_comment, private_key_format, openssh_format_cipher,
1540: rounds)) != 0) {
1.269 djm 1541: error("Saving key \"%s\" failed: %s",
1.252 djm 1542: identity_file, ssh_err(r));
1.240 djm 1543: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1544: free(passphrase);
1.252 djm 1545: sshkey_free(private);
1.227 djm 1546: free(comment);
1.12 markus 1547: exit(1);
1548: }
1.240 djm 1549: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1550: free(passphrase);
1.252 djm 1551: if ((r = sshkey_from_private(private, &public)) != 0)
1.304 markus 1552: fatal("sshkey_from_private failed: %s", ssh_err(r));
1.252 djm 1553: sshkey_free(private);
1.12 markus 1554:
1555: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1556: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1.269 djm 1557: if (fd == -1)
1558: fatal("Could not save your public key in %s", identity_file);
1.46 deraadt 1559: f = fdopen(fd, "w");
1.269 djm 1560: if (f == NULL)
1561: fatal("fdopen %s failed: %s", identity_file, strerror(errno));
1.252 djm 1562: if ((r = sshkey_write(public, f)) != 0)
1.269 djm 1563: fatal("write key failed: %s", ssh_err(r));
1.252 djm 1564: sshkey_free(public);
1.19 markus 1565: fprintf(f, " %s\n", new_comment);
1.12 markus 1566: fclose(f);
1.1 deraadt 1567:
1.227 djm 1568: free(comment);
1.1 deraadt 1569:
1.330 lum 1570: if (strlen(new_comment) > 0)
1571: printf("Comment '%s' applied\n", new_comment);
1572: else
1573: printf("Comment removed\n");
1574:
1.12 markus 1575: exit(0);
1.1 deraadt 1576: }
1577:
1.179 djm 1578: static void
1.252 djm 1579: add_flag_option(struct sshbuf *c, const char *name)
1.179 djm 1580: {
1.252 djm 1581: int r;
1582:
1.179 djm 1583: debug3("%s: %s", __func__, name);
1.252 djm 1584: if ((r = sshbuf_put_cstring(c, name)) != 0 ||
1585: (r = sshbuf_put_string(c, NULL, 0)) != 0)
1586: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.179 djm 1587: }
1588:
1589: static void
1.252 djm 1590: add_string_option(struct sshbuf *c, const char *name, const char *value)
1.179 djm 1591: {
1.252 djm 1592: struct sshbuf *b;
1593: int r;
1.179 djm 1594:
1595: debug3("%s: %s=%s", __func__, name, value);
1.252 djm 1596: if ((b = sshbuf_new()) == NULL)
1597: fatal("%s: sshbuf_new failed", __func__);
1598: if ((r = sshbuf_put_cstring(b, value)) != 0 ||
1599: (r = sshbuf_put_cstring(c, name)) != 0 ||
1600: (r = sshbuf_put_stringb(c, b)) != 0)
1601: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.179 djm 1602:
1.252 djm 1603: sshbuf_free(b);
1.179 djm 1604: }
1605:
1.190 djm 1606: #define OPTIONS_CRITICAL 1
1607: #define OPTIONS_EXTENSIONS 2
1.179 djm 1608: static void
1.252 djm 1609: prepare_options_buf(struct sshbuf *c, int which)
1.179 djm 1610: {
1.300 djm 1611: size_t i;
1612:
1.252 djm 1613: sshbuf_reset(c);
1.196 djm 1614: if ((which & OPTIONS_CRITICAL) != 0 &&
1615: certflags_command != NULL)
1616: add_string_option(c, "force-command", certflags_command);
1.190 djm 1617: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1.210 djm 1618: (certflags_flags & CERTOPT_X_FWD) != 0)
1619: add_flag_option(c, "permit-X11-forwarding");
1620: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1.190 djm 1621: (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1.186 djm 1622: add_flag_option(c, "permit-agent-forwarding");
1.190 djm 1623: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1624: (certflags_flags & CERTOPT_PORT_FWD) != 0)
1.186 djm 1625: add_flag_option(c, "permit-port-forwarding");
1.190 djm 1626: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1627: (certflags_flags & CERTOPT_PTY) != 0)
1.186 djm 1628: add_flag_option(c, "permit-pty");
1.190 djm 1629: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1630: (certflags_flags & CERTOPT_USER_RC) != 0)
1.186 djm 1631: add_flag_option(c, "permit-user-rc");
1.190 djm 1632: if ((which & OPTIONS_CRITICAL) != 0 &&
1633: certflags_src_addr != NULL)
1634: add_string_option(c, "source-address", certflags_src_addr);
1.300 djm 1635: for (i = 0; i < ncert_userext; i++) {
1636: if ((cert_userext[i].crit && (which & OPTIONS_EXTENSIONS)) ||
1637: (!cert_userext[i].crit && (which & OPTIONS_CRITICAL)))
1638: continue;
1639: if (cert_userext[i].val == NULL)
1640: add_flag_option(c, cert_userext[i].key);
1641: else {
1642: add_string_option(c, cert_userext[i].key,
1643: cert_userext[i].val);
1644: }
1645: }
1.179 djm 1646: }
1647:
1.252 djm 1648: static struct sshkey *
1.197 djm 1649: load_pkcs11_key(char *path)
1650: {
1651: #ifdef ENABLE_PKCS11
1.252 djm 1652: struct sshkey **keys = NULL, *public, *private = NULL;
1653: int r, i, nkeys;
1.197 djm 1654:
1.252 djm 1655: if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1656: fatal("Couldn't load CA public key \"%s\": %s",
1657: path, ssh_err(r));
1.197 djm 1658:
1659: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1660: debug3("%s: %d keys", __func__, nkeys);
1661: if (nkeys <= 0)
1662: fatal("cannot read public key from pkcs11");
1663: for (i = 0; i < nkeys; i++) {
1.252 djm 1664: if (sshkey_equal_public(public, keys[i])) {
1.197 djm 1665: private = keys[i];
1666: continue;
1667: }
1.252 djm 1668: sshkey_free(keys[i]);
1.197 djm 1669: }
1.227 djm 1670: free(keys);
1.252 djm 1671: sshkey_free(public);
1.197 djm 1672: return private;
1673: #else
1674: fatal("no pkcs11 support");
1675: #endif /* ENABLE_PKCS11 */
1676: }
1677:
1.305 djm 1678: /* Signer for sshkey_certify_custom that uses the agent */
1679: static int
1.332 djm 1680: agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
1.305 djm 1681: const u_char *data, size_t datalen,
1682: const char *alg, u_int compat, void *ctx)
1683: {
1684: int *agent_fdp = (int *)ctx;
1685:
1686: return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
1687: data, datalen, alg, compat);
1688: }
1689:
1.179 djm 1690: static void
1.325 djm 1691: do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
1.326 djm 1692: unsigned long long cert_serial, int cert_serial_autoinc,
1693: int argc, char **argv)
1.179 djm 1694: {
1.305 djm 1695: int r, i, fd, found, agent_fd = -1;
1.179 djm 1696: u_int n;
1.252 djm 1697: struct sshkey *ca, *public;
1.281 djm 1698: char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1.179 djm 1699: FILE *f;
1.305 djm 1700: struct ssh_identitylist *agent_ids;
1701: size_t j;
1.186 djm 1702:
1.246 markus 1703: #ifdef ENABLE_PKCS11
1.197 djm 1704: pkcs11_init(1);
1.246 markus 1705: #endif
1.197 djm 1706: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1707: if (pkcs11provider != NULL) {
1.305 djm 1708: /* If a PKCS#11 token was specified then try to use it */
1.197 djm 1709: if ((ca = load_pkcs11_key(tmp)) == NULL)
1710: fatal("No PKCS#11 key matching %s found", ca_key_path);
1.305 djm 1711: } else if (prefer_agent) {
1712: /*
1713: * Agent signature requested. Try to use agent after making
1714: * sure the public key specified is actually present in the
1715: * agent.
1716: */
1717: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1718: fatal("Cannot load CA public key %s: %s",
1719: tmp, ssh_err(r));
1720: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
1721: fatal("Cannot use public key for CA signature: %s",
1722: ssh_err(r));
1723: if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
1724: fatal("Retrieve agent key list: %s", ssh_err(r));
1725: found = 0;
1726: for (j = 0; j < agent_ids->nkeys; j++) {
1727: if (sshkey_equal(ca, agent_ids->keys[j])) {
1728: found = 1;
1729: break;
1730: }
1731: }
1732: if (!found)
1733: fatal("CA key %s not found in agent", tmp);
1734: ssh_free_identitylist(agent_ids);
1735: ca->flags |= SSHKEY_FLAG_EXT;
1736: } else {
1737: /* CA key is assumed to be a private key on the filesystem */
1.341 djm 1738: ca = load_identity(tmp, NULL);
1.305 djm 1739: }
1.227 djm 1740: free(tmp);
1.197 djm 1741:
1.290 djm 1742: if (key_type_name != NULL &&
1743: sshkey_type_from_name(key_type_name) != ca->type) {
1744: fatal("CA key type %s doesn't match specified %s",
1745: sshkey_ssh_name(ca), key_type_name);
1746: }
1747:
1.179 djm 1748: for (i = 0; i < argc; i++) {
1749: /* Split list of principals */
1750: n = 0;
1751: if (cert_principals != NULL) {
1752: otmp = tmp = xstrdup(cert_principals);
1753: plist = NULL;
1754: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1.270 deraadt 1755: plist = xreallocarray(plist, n + 1, sizeof(*plist));
1.179 djm 1756: if (*(plist[n] = xstrdup(cp)) == '\0')
1757: fatal("Empty principal name");
1758: }
1.227 djm 1759: free(otmp);
1.179 djm 1760: }
1.312 djm 1761: if (n > SSHKEY_CERT_MAX_PRINCIPALS)
1762: fatal("Too many certificate principals specified");
1.337 djm 1763:
1.179 djm 1764: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1.252 djm 1765: if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1766: fatal("%s: unable to open \"%s\": %s",
1767: __func__, tmp, ssh_err(r));
1.200 djm 1768: if (public->type != KEY_RSA && public->type != KEY_DSA &&
1.313 markus 1769: public->type != KEY_ECDSA && public->type != KEY_ED25519 &&
1770: public->type != KEY_XMSS)
1.179 djm 1771: fatal("%s: key \"%s\" type %s cannot be certified",
1.252 djm 1772: __func__, tmp, sshkey_type(public));
1.179 djm 1773:
1774: /* Prepare certificate to sign */
1.275 djm 1775: if ((r = sshkey_to_certified(public)) != 0)
1.252 djm 1776: fatal("Could not upgrade key %s to certificate: %s",
1777: tmp, ssh_err(r));
1.179 djm 1778: public->cert->type = cert_key_type;
1.186 djm 1779: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1780: public->cert->key_id = xstrdup(cert_key_id);
1781: public->cert->nprincipals = n;
1782: public->cert->principals = plist;
1783: public->cert->valid_after = cert_valid_from;
1784: public->cert->valid_before = cert_valid_to;
1.275 djm 1785: prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1786: prepare_options_buf(public->cert->extensions,
1787: OPTIONS_EXTENSIONS);
1.252 djm 1788: if ((r = sshkey_from_private(ca,
1789: &public->cert->signature_key)) != 0)
1.304 markus 1790: fatal("sshkey_from_private (ca key): %s", ssh_err(r));
1.179 djm 1791:
1.305 djm 1792: if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
1793: if ((r = sshkey_certify_custom(public, ca,
1794: key_type_name, agent_signer, &agent_fd)) != 0)
1795: fatal("Couldn't certify key %s via agent: %s",
1796: tmp, ssh_err(r));
1797: } else {
1798: if ((sshkey_certify(public, ca, key_type_name)) != 0)
1799: fatal("Couldn't certify key %s: %s",
1800: tmp, ssh_err(r));
1801: }
1.179 djm 1802:
1803: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1804: *cp = '\0';
1805: xasprintf(&out, "%s-cert.pub", tmp);
1.227 djm 1806: free(tmp);
1.179 djm 1807:
1808: if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1809: fatal("Could not open \"%s\" for writing: %s", out,
1810: strerror(errno));
1811: if ((f = fdopen(fd, "w")) == NULL)
1812: fatal("%s: fdopen: %s", __func__, strerror(errno));
1.252 djm 1813: if ((r = sshkey_write(public, f)) != 0)
1814: fatal("Could not write certified key to %s: %s",
1815: out, ssh_err(r));
1.179 djm 1816: fprintf(f, " %s\n", comment);
1817: fclose(f);
1818:
1.186 djm 1819: if (!quiet) {
1.282 djm 1820: sshkey_format_cert_validity(public->cert,
1.281 djm 1821: valid, sizeof(valid));
1.186 djm 1822: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1.282 djm 1823: "valid %s", sshkey_cert_type(public),
1.205 djm 1824: out, public->cert->key_id,
1825: (unsigned long long)public->cert->serial,
1.179 djm 1826: cert_principals != NULL ? " for " : "",
1827: cert_principals != NULL ? cert_principals : "",
1.281 djm 1828: valid);
1.186 djm 1829: }
1.179 djm 1830:
1.252 djm 1831: sshkey_free(public);
1.227 djm 1832: free(out);
1.326 djm 1833: if (cert_serial_autoinc)
1834: cert_serial++;
1.179 djm 1835: }
1.246 markus 1836: #ifdef ENABLE_PKCS11
1.197 djm 1837: pkcs11_terminate();
1.246 markus 1838: #endif
1.179 djm 1839: exit(0);
1840: }
1841:
1842: static u_int64_t
1843: parse_relative_time(const char *s, time_t now)
1844: {
1845: int64_t mul, secs;
1846:
1847: mul = *s == '-' ? -1 : 1;
1848:
1849: if ((secs = convtime(s + 1)) == -1)
1850: fatal("Invalid relative certificate time %s", s);
1851: if (mul == -1 && secs > now)
1852: fatal("Certificate time %s cannot be represented", s);
1853: return now + (u_int64_t)(secs * mul);
1854: }
1855:
1856: static void
1857: parse_cert_times(char *timespec)
1858: {
1859: char *from, *to;
1860: time_t now = time(NULL);
1861: int64_t secs;
1862:
1863: /* +timespec relative to now */
1864: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1865: if ((secs = convtime(timespec + 1)) == -1)
1866: fatal("Invalid relative certificate life %s", timespec);
1867: cert_valid_to = now + secs;
1868: /*
1869: * Backdate certificate one minute to avoid problems on hosts
1870: * with poorly-synchronised clocks.
1871: */
1872: cert_valid_from = ((now - 59)/ 60) * 60;
1873: return;
1874: }
1875:
1876: /*
1877: * from:to, where
1.308 djm 1878: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "always"
1879: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "forever"
1.179 djm 1880: */
1881: from = xstrdup(timespec);
1882: to = strchr(from, ':');
1883: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1884: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1885: *to++ = '\0';
1886:
1887: if (*from == '-' || *from == '+')
1888: cert_valid_from = parse_relative_time(from, now);
1.308 djm 1889: else if (strcmp(from, "always") == 0)
1890: cert_valid_from = 0;
1.314 djm 1891: else if (parse_absolute_time(from, &cert_valid_from) != 0)
1892: fatal("Invalid from time \"%s\"", from);
1.179 djm 1893:
1894: if (*to == '-' || *to == '+')
1.235 djm 1895: cert_valid_to = parse_relative_time(to, now);
1.308 djm 1896: else if (strcmp(to, "forever") == 0)
1897: cert_valid_to = ~(u_int64_t)0;
1.314 djm 1898: else if (parse_absolute_time(to, &cert_valid_to) != 0)
1899: fatal("Invalid to time \"%s\"", to);
1.179 djm 1900:
1901: if (cert_valid_to <= cert_valid_from)
1902: fatal("Empty certificate validity interval");
1.227 djm 1903: free(from);
1.179 djm 1904: }
1905:
1906: static void
1.186 djm 1907: add_cert_option(char *opt)
1.179 djm 1908: {
1.300 djm 1909: char *val, *cp;
1910: int iscrit = 0;
1.179 djm 1911:
1.208 stevesk 1912: if (strcasecmp(opt, "clear") == 0)
1.190 djm 1913: certflags_flags = 0;
1.179 djm 1914: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1915: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1916: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1917: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1918: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1919: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1920: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1921: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1922: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1923: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1924: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1925: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1926: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1927: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1928: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 1929: certflags_flags |= CERTOPT_PTY;
1.179 djm 1930: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 1931: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 1932: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 1933: certflags_flags |= CERTOPT_USER_RC;
1.179 djm 1934: else if (strncasecmp(opt, "force-command=", 14) == 0) {
1935: val = opt + 14;
1936: if (*val == '\0')
1.186 djm 1937: fatal("Empty force-command option");
1.190 djm 1938: if (certflags_command != NULL)
1.179 djm 1939: fatal("force-command already specified");
1.190 djm 1940: certflags_command = xstrdup(val);
1.179 djm 1941: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1942: val = opt + 15;
1943: if (*val == '\0')
1.186 djm 1944: fatal("Empty source-address option");
1.190 djm 1945: if (certflags_src_addr != NULL)
1.179 djm 1946: fatal("source-address already specified");
1947: if (addr_match_cidr_list(NULL, val) != 0)
1948: fatal("Invalid source-address list");
1.190 djm 1949: certflags_src_addr = xstrdup(val);
1.300 djm 1950: } else if (strncasecmp(opt, "extension:", 10) == 0 ||
1951: (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
1952: val = xstrdup(strchr(opt, ':') + 1);
1953: if ((cp = strchr(val, '=')) != NULL)
1954: *cp++ = '\0';
1955: cert_userext = xreallocarray(cert_userext, ncert_userext + 1,
1956: sizeof(*cert_userext));
1957: cert_userext[ncert_userext].key = val;
1958: cert_userext[ncert_userext].val = cp == NULL ?
1959: NULL : xstrdup(cp);
1960: cert_userext[ncert_userext].crit = iscrit;
1961: ncert_userext++;
1.179 djm 1962: } else
1.186 djm 1963: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 1964: }
1965:
1.63 itojun 1966: static void
1.275 djm 1967: show_options(struct sshbuf *optbuf, int in_critical)
1.192 djm 1968: {
1.245 djm 1969: char *name, *arg;
1.252 djm 1970: struct sshbuf *options, *option = NULL;
1971: int r;
1972:
1973: if ((options = sshbuf_fromb(optbuf)) == NULL)
1974: fatal("%s: sshbuf_fromb failed", __func__);
1975: while (sshbuf_len(options) != 0) {
1976: sshbuf_free(option);
1977: option = NULL;
1978: if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
1979: (r = sshbuf_froms(options, &option)) != 0)
1980: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.192 djm 1981: printf(" %s", name);
1.275 djm 1982: if (!in_critical &&
1.192 djm 1983: (strcmp(name, "permit-X11-forwarding") == 0 ||
1984: strcmp(name, "permit-agent-forwarding") == 0 ||
1985: strcmp(name, "permit-port-forwarding") == 0 ||
1986: strcmp(name, "permit-pty") == 0 ||
1987: strcmp(name, "permit-user-rc") == 0))
1988: printf("\n");
1.275 djm 1989: else if (in_critical &&
1.192 djm 1990: (strcmp(name, "force-command") == 0 ||
1991: strcmp(name, "source-address") == 0)) {
1.252 djm 1992: if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1993: fatal("%s: buffer error: %s",
1994: __func__, ssh_err(r));
1.245 djm 1995: printf(" %s\n", arg);
1996: free(arg);
1.192 djm 1997: } else {
1.252 djm 1998: printf(" UNKNOWN OPTION (len %zu)\n",
1999: sshbuf_len(option));
2000: sshbuf_reset(option);
1.192 djm 2001: }
1.227 djm 2002: free(name);
1.252 djm 2003: if (sshbuf_len(option) != 0)
1.192 djm 2004: fatal("Option corrupt: extra data at end");
2005: }
1.252 djm 2006: sshbuf_free(option);
2007: sshbuf_free(options);
1.192 djm 2008: }
2009:
2010: static void
1.278 djm 2011: print_cert(struct sshkey *key)
1.182 djm 2012: {
1.281 djm 2013: char valid[64], *key_fp, *ca_fp;
1.275 djm 2014: u_int i;
1.186 djm 2015:
1.252 djm 2016: key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
2017: ca_fp = sshkey_fingerprint(key->cert->signature_key,
1.251 djm 2018: fingerprint_hash, SSH_FP_DEFAULT);
1.259 djm 2019: if (key_fp == NULL || ca_fp == NULL)
2020: fatal("%s: sshkey_fingerprint fail", __func__);
1.281 djm 2021: sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1.182 djm 2022:
1.252 djm 2023: printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
2024: sshkey_cert_type(key));
2025: printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1.323 djm 2026: printf(" Signing CA: %s %s (using %s)\n",
2027: sshkey_type(key->cert->signature_key), ca_fp,
2028: key->cert->signature_type);
1.186 djm 2029: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1.275 djm 2030: printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1.281 djm 2031: printf(" Valid: %s\n", valid);
1.182 djm 2032: printf(" Principals: ");
2033: if (key->cert->nprincipals == 0)
2034: printf("(none)\n");
2035: else {
2036: for (i = 0; i < key->cert->nprincipals; i++)
2037: printf("\n %s",
2038: key->cert->principals[i]);
2039: printf("\n");
2040: }
1.186 djm 2041: printf(" Critical Options: ");
1.252 djm 2042: if (sshbuf_len(key->cert->critical) == 0)
1.182 djm 2043: printf("(none)\n");
2044: else {
2045: printf("\n");
1.275 djm 2046: show_options(key->cert->critical, 1);
1.186 djm 2047: }
1.275 djm 2048: printf(" Extensions: ");
2049: if (sshbuf_len(key->cert->extensions) == 0)
2050: printf("(none)\n");
2051: else {
2052: printf("\n");
2053: show_options(key->cert->extensions, 0);
1.182 djm 2054: }
1.278 djm 2055: }
2056:
2057: static void
2058: do_show_cert(struct passwd *pw)
2059: {
2060: struct sshkey *key = NULL;
2061: struct stat st;
2062: int r, is_stdin = 0, ok = 0;
2063: FILE *f;
1.317 markus 2064: char *cp, *line = NULL;
1.278 djm 2065: const char *path;
1.317 markus 2066: size_t linesize = 0;
1.289 djm 2067: u_long lnum = 0;
1.278 djm 2068:
2069: if (!have_identity)
2070: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 2071: if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
1.278 djm 2072: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
2073:
2074: path = identity_file;
2075: if (strcmp(path, "-") == 0) {
2076: f = stdin;
2077: path = "(stdin)";
2078: is_stdin = 1;
2079: } else if ((f = fopen(identity_file, "r")) == NULL)
2080: fatal("fopen %s: %s", identity_file, strerror(errno));
2081:
1.317 markus 2082: while (getline(&line, &linesize, f) != -1) {
2083: lnum++;
1.278 djm 2084: sshkey_free(key);
2085: key = NULL;
2086: /* Trim leading space and comments */
2087: cp = line + strspn(line, " \t");
2088: if (*cp == '#' || *cp == '\0')
2089: continue;
2090: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2091: fatal("sshkey_new");
1.278 djm 2092: if ((r = sshkey_read(key, &cp)) != 0) {
2093: error("%s:%lu: invalid key: %s", path,
2094: lnum, ssh_err(r));
2095: continue;
2096: }
2097: if (!sshkey_is_cert(key)) {
2098: error("%s:%lu is not a certificate", path, lnum);
2099: continue;
2100: }
2101: ok = 1;
2102: if (!is_stdin && lnum == 1)
2103: printf("%s:\n", path);
2104: else
2105: printf("%s:%lu:\n", path, lnum);
2106: print_cert(key);
2107: }
1.317 markus 2108: free(line);
1.278 djm 2109: sshkey_free(key);
2110: fclose(f);
2111: exit(ok ? 0 : 1);
1.182 djm 2112: }
2113:
1.246 markus 2114: #ifdef WITH_OPENSSL
1.182 djm 2115: static void
1.223 djm 2116: load_krl(const char *path, struct ssh_krl **krlp)
2117: {
1.252 djm 2118: struct sshbuf *krlbuf;
2119: int r, fd;
1.223 djm 2120:
1.252 djm 2121: if ((krlbuf = sshbuf_new()) == NULL)
2122: fatal("sshbuf_new failed");
1.223 djm 2123: if ((fd = open(path, O_RDONLY)) == -1)
2124: fatal("open %s: %s", path, strerror(errno));
1.252 djm 2125: if ((r = sshkey_load_file(fd, krlbuf)) != 0)
2126: fatal("Unable to load KRL: %s", ssh_err(r));
1.223 djm 2127: close(fd);
2128: /* XXX check sigs */
1.252 djm 2129: if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1.223 djm 2130: *krlp == NULL)
1.252 djm 2131: fatal("Invalid KRL file: %s", ssh_err(r));
2132: sshbuf_free(krlbuf);
1.223 djm 2133: }
2134:
2135: static void
1.320 djm 2136: hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
2137: const char *file, u_long lnum)
2138: {
2139: char *tmp;
2140: size_t tlen;
2141: struct sshbuf *b;
2142: int r;
2143:
2144: if (strncmp(cp, "SHA256:", 7) != 0)
2145: fatal("%s:%lu: unsupported hash algorithm", file, lnum);
2146: cp += 7;
2147:
2148: /*
2149: * OpenSSH base64 hashes omit trailing '='
2150: * characters; put them back for decode.
2151: */
2152: tlen = strlen(cp);
2153: tmp = xmalloc(tlen + 4 + 1);
2154: strlcpy(tmp, cp, tlen + 1);
2155: while ((tlen % 4) != 0) {
2156: tmp[tlen++] = '=';
2157: tmp[tlen] = '\0';
2158: }
2159: if ((b = sshbuf_new()) == NULL)
2160: fatal("%s: sshbuf_new failed", __func__);
2161: if ((r = sshbuf_b64tod(b, tmp)) != 0)
2162: fatal("%s:%lu: decode hash failed: %s", file, lnum, ssh_err(r));
2163: free(tmp);
2164: *lenp = sshbuf_len(b);
2165: *blobp = xmalloc(*lenp);
2166: memcpy(*blobp, sshbuf_ptr(b), *lenp);
2167: sshbuf_free(b);
2168: }
2169:
2170: static void
1.261 djm 2171: update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1.252 djm 2172: const struct sshkey *ca, struct ssh_krl *krl)
1.223 djm 2173: {
1.252 djm 2174: struct sshkey *key = NULL;
1.223 djm 2175: u_long lnum = 0;
1.317 markus 2176: char *path, *cp, *ep, *line = NULL;
1.320 djm 2177: u_char *blob = NULL;
2178: size_t blen = 0, linesize = 0;
1.223 djm 2179: unsigned long long serial, serial2;
1.320 djm 2180: int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
1.223 djm 2181: FILE *krl_spec;
2182:
2183: path = tilde_expand_filename(file, pw->pw_uid);
2184: if (strcmp(path, "-") == 0) {
2185: krl_spec = stdin;
2186: free(path);
2187: path = xstrdup("(standard input)");
2188: } else if ((krl_spec = fopen(path, "r")) == NULL)
2189: fatal("fopen %s: %s", path, strerror(errno));
2190:
2191: if (!quiet)
2192: printf("Revoking from %s\n", path);
1.317 markus 2193: while (getline(&line, &linesize, krl_spec) != -1) {
2194: lnum++;
1.320 djm 2195: was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
1.223 djm 2196: cp = line + strspn(line, " \t");
2197: /* Trim trailing space, comments and strip \n */
2198: for (i = 0, r = -1; cp[i] != '\0'; i++) {
2199: if (cp[i] == '#' || cp[i] == '\n') {
2200: cp[i] = '\0';
2201: break;
2202: }
2203: if (cp[i] == ' ' || cp[i] == '\t') {
2204: /* Remember the start of a span of whitespace */
2205: if (r == -1)
2206: r = i;
2207: } else
2208: r = -1;
2209: }
2210: if (r != -1)
2211: cp[r] = '\0';
2212: if (*cp == '\0')
2213: continue;
2214: if (strncasecmp(cp, "serial:", 7) == 0) {
1.261 djm 2215: if (ca == NULL && !wild_ca) {
1.231 djm 2216: fatal("revoking certificates by serial number "
1.223 djm 2217: "requires specification of a CA key");
2218: }
2219: cp += 7;
2220: cp = cp + strspn(cp, " \t");
2221: errno = 0;
2222: serial = strtoull(cp, &ep, 0);
2223: if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2224: fatal("%s:%lu: invalid serial \"%s\"",
2225: path, lnum, cp);
2226: if (errno == ERANGE && serial == ULLONG_MAX)
2227: fatal("%s:%lu: serial out of range",
2228: path, lnum);
2229: serial2 = serial;
2230: if (*ep == '-') {
2231: cp = ep + 1;
2232: errno = 0;
2233: serial2 = strtoull(cp, &ep, 0);
2234: if (*cp == '\0' || *ep != '\0')
2235: fatal("%s:%lu: invalid serial \"%s\"",
2236: path, lnum, cp);
2237: if (errno == ERANGE && serial2 == ULLONG_MAX)
2238: fatal("%s:%lu: serial out of range",
2239: path, lnum);
2240: if (serial2 <= serial)
2241: fatal("%s:%lu: invalid serial range "
2242: "%llu:%llu", path, lnum,
2243: (unsigned long long)serial,
2244: (unsigned long long)serial2);
2245: }
2246: if (ssh_krl_revoke_cert_by_serial_range(krl,
2247: ca, serial, serial2) != 0) {
2248: fatal("%s: revoke serial failed",
2249: __func__);
2250: }
2251: } else if (strncasecmp(cp, "id:", 3) == 0) {
1.261 djm 2252: if (ca == NULL && !wild_ca) {
1.232 djm 2253: fatal("revoking certificates by key ID "
1.223 djm 2254: "requires specification of a CA key");
2255: }
2256: cp += 3;
2257: cp = cp + strspn(cp, " \t");
2258: if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
2259: fatal("%s: revoke key ID failed", __func__);
1.320 djm 2260: } else if (strncasecmp(cp, "hash:", 5) == 0) {
2261: cp += 5;
2262: cp = cp + strspn(cp, " \t");
2263: hash_to_blob(cp, &blob, &blen, file, lnum);
2264: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
1.223 djm 2265: } else {
2266: if (strncasecmp(cp, "key:", 4) == 0) {
2267: cp += 4;
2268: cp = cp + strspn(cp, " \t");
2269: was_explicit_key = 1;
2270: } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2271: cp += 5;
2272: cp = cp + strspn(cp, " \t");
2273: was_sha1 = 1;
1.320 djm 2274: } else if (strncasecmp(cp, "sha256:", 7) == 0) {
2275: cp += 7;
2276: cp = cp + strspn(cp, " \t");
2277: was_sha256 = 1;
1.223 djm 2278: /*
2279: * Just try to process the line as a key.
2280: * Parsing will fail if it isn't.
2281: */
2282: }
1.252 djm 2283: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2284: fatal("sshkey_new");
1.252 djm 2285: if ((r = sshkey_read(key, &cp)) != 0)
2286: fatal("%s:%lu: invalid key: %s",
2287: path, lnum, ssh_err(r));
1.223 djm 2288: if (was_explicit_key)
2289: r = ssh_krl_revoke_key_explicit(krl, key);
1.320 djm 2290: else if (was_sha1) {
2291: if (sshkey_fingerprint_raw(key,
2292: SSH_DIGEST_SHA1, &blob, &blen) != 0) {
2293: fatal("%s:%lu: fingerprint failed",
2294: file, lnum);
2295: }
2296: r = ssh_krl_revoke_key_sha1(krl, blob, blen);
2297: } else if (was_sha256) {
2298: if (sshkey_fingerprint_raw(key,
2299: SSH_DIGEST_SHA256, &blob, &blen) != 0) {
2300: fatal("%s:%lu: fingerprint failed",
2301: file, lnum);
2302: }
2303: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
2304: } else
1.223 djm 2305: r = ssh_krl_revoke_key(krl, key);
2306: if (r != 0)
1.252 djm 2307: fatal("%s: revoke key failed: %s",
2308: __func__, ssh_err(r));
1.320 djm 2309: freezero(blob, blen);
2310: blob = NULL;
2311: blen = 0;
1.252 djm 2312: sshkey_free(key);
1.223 djm 2313: }
2314: }
2315: if (strcmp(path, "-") != 0)
2316: fclose(krl_spec);
1.317 markus 2317: free(line);
1.226 djm 2318: free(path);
1.223 djm 2319: }
2320:
2321: static void
1.325 djm 2322: do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
2323: unsigned long long krl_version, const char *krl_comment,
2324: int argc, char **argv)
1.223 djm 2325: {
2326: struct ssh_krl *krl;
2327: struct stat sb;
1.252 djm 2328: struct sshkey *ca = NULL;
1.261 djm 2329: int fd, i, r, wild_ca = 0;
1.223 djm 2330: char *tmp;
1.252 djm 2331: struct sshbuf *kbuf;
1.223 djm 2332:
2333: if (*identity_file == '\0')
2334: fatal("KRL generation requires an output file");
2335: if (stat(identity_file, &sb) == -1) {
2336: if (errno != ENOENT)
2337: fatal("Cannot access KRL \"%s\": %s",
2338: identity_file, strerror(errno));
2339: if (updating)
2340: fatal("KRL \"%s\" does not exist", identity_file);
2341: }
2342: if (ca_key_path != NULL) {
1.261 djm 2343: if (strcasecmp(ca_key_path, "none") == 0)
2344: wild_ca = 1;
2345: else {
2346: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2347: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
2348: fatal("Cannot load CA public key %s: %s",
2349: tmp, ssh_err(r));
2350: free(tmp);
2351: }
1.223 djm 2352: }
2353:
2354: if (updating)
2355: load_krl(identity_file, &krl);
2356: else if ((krl = ssh_krl_init()) == NULL)
2357: fatal("couldn't create KRL");
2358:
1.325 djm 2359: if (krl_version != 0)
2360: ssh_krl_set_version(krl, krl_version);
2361: if (krl_comment != NULL)
2362: ssh_krl_set_comment(krl, krl_comment);
1.223 djm 2363:
2364: for (i = 0; i < argc; i++)
1.261 djm 2365: update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
1.223 djm 2366:
1.252 djm 2367: if ((kbuf = sshbuf_new()) == NULL)
2368: fatal("sshbuf_new failed");
2369: if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
1.223 djm 2370: fatal("Couldn't generate KRL");
2371: if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2372: fatal("open %s: %s", identity_file, strerror(errno));
1.318 markus 2373: if (atomicio(vwrite, fd, sshbuf_mutable_ptr(kbuf), sshbuf_len(kbuf)) !=
1.252 djm 2374: sshbuf_len(kbuf))
1.223 djm 2375: fatal("write %s: %s", identity_file, strerror(errno));
2376: close(fd);
1.252 djm 2377: sshbuf_free(kbuf);
1.223 djm 2378: ssh_krl_free(krl);
1.286 mmcc 2379: sshkey_free(ca);
1.223 djm 2380: }
2381:
2382: static void
2383: do_check_krl(struct passwd *pw, int argc, char **argv)
2384: {
2385: int i, r, ret = 0;
2386: char *comment;
2387: struct ssh_krl *krl;
1.252 djm 2388: struct sshkey *k;
1.223 djm 2389:
2390: if (*identity_file == '\0')
2391: fatal("KRL checking requires an input file");
2392: load_krl(identity_file, &krl);
2393: for (i = 0; i < argc; i++) {
1.252 djm 2394: if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
2395: fatal("Cannot load public key %s: %s",
2396: argv[i], ssh_err(r));
1.223 djm 2397: r = ssh_krl_check_key(krl, k);
2398: printf("%s%s%s%s: %s\n", argv[i],
2399: *comment ? " (" : "", comment, *comment ? ")" : "",
2400: r == 0 ? "ok" : "REVOKED");
2401: if (r != 0)
2402: ret = 1;
1.252 djm 2403: sshkey_free(k);
1.223 djm 2404: free(comment);
2405: }
2406: ssh_krl_free(krl);
2407: exit(ret);
2408: }
1.246 markus 2409: #endif
1.223 djm 2410:
1.344 djm 2411: static struct sshkey *
2412: load_sign_key(const char *keypath, const struct sshkey *pubkey)
2413: {
2414: size_t i, slen, plen = strlen(keypath);
2415: char *privpath = xstrdup(keypath);
2416: const char *suffixes[] = { "-cert.pub", ".pub", NULL };
2417: struct sshkey *ret = NULL, *privkey = NULL;
2418: int r;
2419:
2420: /*
2421: * If passed a public key filename, then try to locate the correponding
2422: * private key. This lets us specify certificates on the command-line
2423: * and have ssh-keygen find the appropriate private key.
2424: */
2425: for (i = 0; suffixes[i]; i++) {
2426: slen = strlen(suffixes[i]);
2427: if (plen <= slen ||
2428: strcmp(privpath + plen - slen, suffixes[i]) != 0)
2429: continue;
2430: privpath[plen - slen] = '\0';
2431: debug("%s: %s looks like a public key, using private key "
2432: "path %s instead", __func__, keypath, privpath);
2433: }
2434: if ((privkey = load_identity(privpath, NULL)) == NULL) {
2435: error("Couldn't load identity %s", keypath);
2436: goto done;
2437: }
2438: if (!sshkey_equal_public(pubkey, privkey)) {
2439: error("Public key %s doesn't match private %s",
2440: keypath, privpath);
2441: goto done;
2442: }
2443: if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
2444: /*
2445: * Graft the certificate onto the private key to make
2446: * it capable of signing.
2447: */
2448: if ((r = sshkey_to_certified(privkey)) != 0) {
2449: error("%s: sshkey_to_certified: %s", __func__,
2450: ssh_err(r));
2451: goto done;
2452: }
2453: if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
2454: error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r));
2455: goto done;
2456: }
2457: }
2458: /* success */
2459: ret = privkey;
2460: privkey = NULL;
2461: done:
2462: sshkey_free(privkey);
2463: free(privpath);
2464: return ret;
2465: }
2466:
2467: static int
2468: sign_one(struct sshkey *signkey, const char *filename, int fd,
2469: const char *sig_namespace, sshsig_signer *signer, void *signer_ctx)
2470: {
2471: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2472: int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
2473: char *wfile = NULL;
2474: char *asig = NULL;
2475:
2476: if (!quiet) {
2477: if (fd == STDIN_FILENO)
2478: fprintf(stderr, "Signing data on standard input\n");
2479: else
2480: fprintf(stderr, "Signing file %s\n", filename);
2481: }
2482: if ((r = sshsig_sign_fd(signkey, NULL, fd, sig_namespace,
2483: &sigbuf, signer, signer_ctx)) != 0) {
2484: error("Signing %s failed: %s", filename, ssh_err(r));
2485: goto out;
2486: }
2487: if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
2488: error("%s: sshsig_armor: %s", __func__, ssh_err(r));
2489: goto out;
2490: }
2491: if ((asig = sshbuf_dup_string(abuf)) == NULL) {
2492: error("%s: buffer error", __func__);
2493: r = SSH_ERR_ALLOC_FAIL;
2494: goto out;
2495: }
2496:
2497: if (fd == STDIN_FILENO) {
2498: fputs(asig, stdout);
2499: fflush(stdout);
2500: } else {
2501: xasprintf(&wfile, "%s.sig", filename);
2502: if (confirm_overwrite(wfile)) {
2503: if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
2504: 0666)) == -1) {
2505: oerrno = errno;
2506: error("Cannot open %s: %s",
2507: wfile, strerror(errno));
2508: errno = oerrno;
2509: r = SSH_ERR_SYSTEM_ERROR;
2510: goto out;
2511: }
2512: if (atomicio(vwrite, wfd, asig,
2513: strlen(asig)) != strlen(asig)) {
2514: oerrno = errno;
2515: error("Cannot write to %s: %s",
2516: wfile, strerror(errno));
2517: errno = oerrno;
2518: r = SSH_ERR_SYSTEM_ERROR;
2519: goto out;
2520: }
2521: if (!quiet) {
2522: fprintf(stderr, "Write signature to %s\n",
2523: wfile);
2524: }
2525: }
2526: }
2527: /* success */
2528: r = 0;
2529: out:
2530: free(wfile);
2531: free(asig);
2532: sshbuf_free(abuf);
2533: sshbuf_free(sigbuf);
2534: if (wfd != -1)
2535: close(wfd);
2536: return r;
2537: }
2538:
2539: static int
2540: sign(const char *keypath, const char *sig_namespace, int argc, char **argv)
2541: {
2542: int i, fd = -1, r, ret = -1;
2543: int agent_fd = -1;
2544: struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
2545: sshsig_signer *signer = NULL;
2546:
2547: /* Check file arguments. */
2548: for (i = 0; i < argc; i++) {
2549: if (strcmp(argv[i], "-") != 0)
2550: continue;
2551: if (i > 0 || argc > 1)
2552: fatal("Cannot sign mix of paths and standard input");
2553: }
2554:
2555: if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
2556: error("Couldn't load public key %s: %s", keypath, ssh_err(r));
2557: goto done;
2558: }
2559:
2560: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
2561: debug("Couldn't get agent socket: %s", ssh_err(r));
2562: else {
2563: if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
2564: signer = agent_signer;
2565: else
2566: debug("Couldn't find key in agent: %s", ssh_err(r));
2567: }
2568:
2569: if (signer == NULL) {
2570: /* Not using agent - try to load private key */
2571: if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
2572: goto done;
2573: signkey = privkey;
2574: } else {
2575: /* Will use key in agent */
2576: signkey = pubkey;
2577: }
2578:
2579: if (argc == 0) {
2580: if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
2581: sig_namespace, signer, &agent_fd)) != 0)
2582: goto done;
2583: } else {
2584: for (i = 0; i < argc; i++) {
2585: if (strcmp(argv[i], "-") == 0)
2586: fd = STDIN_FILENO;
2587: else if ((fd = open(argv[i], O_RDONLY)) == -1) {
2588: error("Cannot open %s for signing: %s",
2589: argv[i], strerror(errno));
2590: goto done;
2591: }
2592: if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
2593: signer, &agent_fd)) != 0)
2594: goto done;
2595: if (fd != STDIN_FILENO)
2596: close(fd);
2597: fd = -1;
2598: }
2599: }
2600:
2601: ret = 0;
2602: done:
2603: if (fd != -1 && fd != STDIN_FILENO)
2604: close(fd);
2605: sshkey_free(pubkey);
2606: sshkey_free(privkey);
2607: return ret;
2608: }
2609:
2610: static int
2611: verify(const char *signature, const char *sig_namespace, const char *principal,
2612: const char *allowed_keys, const char *revoked_keys)
2613: {
2614: int r, ret = -1, sigfd = -1;
2615: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2616: struct sshkey *sign_key = NULL;
2617: char *fp = NULL;
2618:
2619: if ((abuf = sshbuf_new()) == NULL)
2620: fatal("%s: sshbuf_new() failed", __func__);
2621:
2622: if ((sigfd = open(signature, O_RDONLY)) < 0) {
2623: error("Couldn't open signature file %s", signature);
2624: goto done;
2625: }
2626:
2627: if ((r = sshkey_load_file(sigfd, abuf)) != 0) {
2628: error("Couldn't read signature file: %s", ssh_err(r));
2629: goto done;
2630: }
2631: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
2632: error("%s: sshsig_armor: %s", __func__, ssh_err(r));
2633: return r;
2634: }
2635: if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
2636: &sign_key)) != 0)
2637: goto done; /* sshsig_verify() prints error */
2638:
2639: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2640: SSH_FP_DEFAULT)) == NULL)
2641: fatal("%s: sshkey_fingerprint failed", __func__);
2642: debug("Valid (unverified) signature from key %s", fp);
2643: free(fp);
2644: fp = NULL;
2645:
2646: if (revoked_keys != NULL) {
1.345 djm 2647: if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
2648: debug3("sshkey_check_revoked failed: %s", ssh_err(r));
2649: goto done;
2650: }
1.344 djm 2651: }
2652:
1.350 djm 2653: if (allowed_keys != NULL &&
2654: (r = sshsig_check_allowed_keys(allowed_keys, sign_key,
2655: principal, sig_namespace)) != 0) {
1.344 djm 2656: debug3("sshsig_check_allowed_keys failed: %s", ssh_err(r));
2657: goto done;
2658: }
2659: /* success */
2660: ret = 0;
2661: done:
2662: if (!quiet) {
2663: if (ret == 0) {
2664: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2665: SSH_FP_DEFAULT)) == NULL) {
2666: fatal("%s: sshkey_fingerprint failed",
2667: __func__);
2668: }
1.350 djm 2669: if (principal == NULL) {
2670: printf("Good \"%s\" signature with %s key %s\n",
2671: sig_namespace, sshkey_type(sign_key), fp);
2672:
2673: } else {
2674: printf("Good \"%s\" signature for %s with %s key %s\n",
2675: sig_namespace, principal,
2676: sshkey_type(sign_key), fp);
2677: }
1.344 djm 2678: } else {
2679: printf("Could not verify signature.\n");
2680: }
2681: }
2682: if (sigfd != -1)
2683: close(sigfd);
2684: sshbuf_free(sigbuf);
2685: sshbuf_free(abuf);
2686: sshkey_free(sign_key);
2687: free(fp);
2688: return ret;
2689: }
2690:
1.223 djm 2691: static void
1.10 markus 2692: usage(void)
2693: {
1.243 deraadt 2694: fprintf(stderr,
1.355 jmc 2695: "usage: ssh-keygen [-q] [-b bits] [-C comment] [-f output_keyfile] [-m format]\n"
2696: " [-N new_passphrase] [-t dsa | ecdsa | ed25519 | rsa]\n"
2697: " ssh-keygen -p [-f keyfile] [-m format] [-N new_passphrase]\n"
2698: " [-P old_passphrase]\n"
2699: " ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
2700: " ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
1.243 deraadt 2701: " ssh-keygen -y [-f input_keyfile]\n"
1.355 jmc 2702: " ssh-keygen -c [-C comment] [-f keyfile] [-P passphrase]\n"
1.265 naddy 2703: " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
1.302 djm 2704: " ssh-keygen -B [-f input_keyfile]\n");
1.177 markus 2705: #ifdef ENABLE_PKCS11
1.243 deraadt 2706: fprintf(stderr,
2707: " ssh-keygen -D pkcs11\n");
1.177 markus 2708: #endif
1.243 deraadt 2709: fprintf(stderr,
1.352 jmc 2710: " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
1.243 deraadt 2711: " ssh-keygen -H [-f known_hosts_file]\n"
2712: " ssh-keygen -R hostname [-f known_hosts_file]\n"
1.352 jmc 2713: " ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
1.274 djm 2714: #ifdef WITH_OPENSSL
1.243 deraadt 2715: " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n"
1.355 jmc 2716: " ssh-keygen -f input_file -T output_file [-v] [-a rounds] [-J num_lines]\n"
1.243 deraadt 2717: " [-j start_line] [-K checkpt] [-W generator]\n"
1.274 djm 2718: #endif
1.355 jmc 2719: " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
2720: " [-n principals] [-O option] [-V validity_interval]\n"
2721: " [-z serial_number] file ...\n"
1.243 deraadt 2722: " ssh-keygen -L [-f input_keyfile]\n"
1.355 jmc 2723: " ssh-keygen -A [-f prefix_path]\n"
1.243 deraadt 2724: " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
2725: " file ...\n"
1.346 naddy 2726: " ssh-keygen -Q -f krl_file file ...\n"
1.355 jmc 2727: " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
2728: " ssh-keygen -Y sign -f key_file -n namespace file ...\n"
2729: " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
2730: " -n namespace -s signature_file [-r revocation_file]\n");
1.12 markus 2731: exit(1);
1.10 markus 2732: }
2733:
1.13 deraadt 2734: /*
2735: * Main program for key management.
2736: */
1.2 provos 2737: int
1.156 deraadt 2738: main(int argc, char **argv)
1.1 deraadt 2739: {
1.253 deraadt 2740: char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2;
1.274 djm 2741: char *rr_hostname = NULL, *ep, *fp, *ra;
1.252 djm 2742: struct sshkey *private, *public;
1.12 markus 2743: struct passwd *pw;
2744: struct stat st;
1.252 djm 2745: int r, opt, type, fd;
1.325 djm 2746: int change_passphrase = 0, change_comment = 0, show_cert = 0;
2747: int find_host = 0, delete_host = 0, hash_hosts = 0;
1.274 djm 2748: int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
1.325 djm 2749: int prefer_agent = 0, convert_to = 0, convert_from = 0;
1.326 djm 2750: int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
1.325 djm 2751: unsigned long long cert_serial = 0;
2752: char *identity_comment = NULL, *ca_key_path = NULL;
1.340 dtucker 2753: u_int32_t bits = 0;
1.274 djm 2754: FILE *f;
2755: const char *errstr;
1.325 djm 2756: int log_level = SYSLOG_LEVEL_INFO;
1.344 djm 2757: char *sign_op = NULL;
1.274 djm 2758: #ifdef WITH_OPENSSL
2759: /* Moduli generation/screening */
2760: char out_file[PATH_MAX], *checkpoint = NULL;
1.237 markus 2761: u_int32_t memory = 0, generator_wanted = 0;
1.107 djm 2762: int do_gen_candidates = 0, do_screen_candidates = 0;
1.215 dtucker 2763: unsigned long start_lineno = 0, lines_to_process = 0;
1.107 djm 2764: BIGNUM *start = NULL;
1.274 djm 2765: #endif
1.33 markus 2766:
1.12 markus 2767: extern int optind;
2768: extern char *optarg;
1.129 djm 2769:
2770: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
2771: sanitise_stdfd();
1.12 markus 2772:
1.348 djm 2773: #ifdef WITH_OPENSSL
1.201 djm 2774: OpenSSL_add_all_algorithms();
1.348 djm 2775: #endif
1.156 deraadt 2776: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.294 djm 2777:
2778: setlocale(LC_CTYPE, "");
1.19 markus 2779:
1.14 markus 2780: /* we need this for the home * directory. */
1.12 markus 2781: pw = getpwuid(getuid());
1.269 djm 2782: if (!pw)
2783: fatal("No user exists for uid %lu", (u_long)getuid());
1.333 deraadt 2784: if (gethostname(hostname, sizeof(hostname)) == -1)
1.269 djm 2785: fatal("gethostname: %s", strerror(errno));
1.14 markus 2786:
1.344 djm 2787: /* Remaining characters: dw */
1.305 djm 2788: while ((opt = getopt(argc, argv, "ABHLQUXceghiklopquvxy"
1.344 djm 2789: "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Y:Z:"
1.251 djm 2790: "a:b:f:g:j:m:n:r:s:t:z:")) != -1) {
1.12 markus 2791: switch (opt) {
1.206 stevesk 2792: case 'A':
2793: gen_all_hostkeys = 1;
2794: break;
1.12 markus 2795: case 'b':
1.340 dtucker 2796: bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
2797: &errstr);
1.125 avsm 2798: if (errstr)
2799: fatal("Bits has bad value %s (%s)",
2800: optarg, errstr);
1.12 markus 2801: break;
1.251 djm 2802: case 'E':
2803: fingerprint_hash = ssh_digest_alg_by_name(optarg);
2804: if (fingerprint_hash == -1)
2805: fatal("Invalid hash algorithm \"%s\"", optarg);
2806: break;
1.119 djm 2807: case 'F':
2808: find_host = 1;
2809: rr_hostname = optarg;
2810: break;
2811: case 'H':
2812: hash_hosts = 1;
2813: break;
1.179 djm 2814: case 'I':
2815: cert_key_id = optarg;
2816: break;
1.119 djm 2817: case 'R':
2818: delete_host = 1;
2819: rr_hostname = optarg;
2820: break;
1.182 djm 2821: case 'L':
2822: show_cert = 1;
2823: break;
1.12 markus 2824: case 'l':
2825: print_fingerprint = 1;
2826: break;
1.49 markus 2827: case 'B':
2828: print_bubblebabble = 1;
2829: break;
1.193 djm 2830: case 'm':
2831: if (strcasecmp(optarg, "RFC4716") == 0 ||
2832: strcasecmp(optarg, "ssh2") == 0) {
2833: convert_format = FMT_RFC4716;
2834: break;
2835: }
2836: if (strcasecmp(optarg, "PKCS8") == 0) {
2837: convert_format = FMT_PKCS8;
1.336 djm 2838: private_key_format = SSHKEY_PRIVATE_PKCS8;
1.193 djm 2839: break;
2840: }
2841: if (strcasecmp(optarg, "PEM") == 0) {
2842: convert_format = FMT_PEM;
1.336 djm 2843: private_key_format = SSHKEY_PRIVATE_PEM;
1.193 djm 2844: break;
2845: }
2846: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 2847: case 'n':
2848: cert_principals = optarg;
2849: break;
1.237 markus 2850: case 'o':
1.319 djm 2851: /* no-op; new format is already the default */
1.237 markus 2852: break;
1.12 markus 2853: case 'p':
2854: change_passphrase = 1;
2855: break;
2856: case 'c':
2857: change_comment = 1;
2858: break;
2859: case 'f':
1.274 djm 2860: if (strlcpy(identity_file, optarg,
2861: sizeof(identity_file)) >= sizeof(identity_file))
1.124 avsm 2862: fatal("Identity filename too long");
1.12 markus 2863: have_identity = 1;
2864: break;
1.105 jakob 2865: case 'g':
2866: print_generic = 1;
2867: break;
1.12 markus 2868: case 'P':
2869: identity_passphrase = optarg;
2870: break;
2871: case 'N':
2872: identity_new_passphrase = optarg;
2873: break;
1.223 djm 2874: case 'Q':
2875: check_krl = 1;
2876: break;
1.179 djm 2877: case 'O':
1.186 djm 2878: add_cert_option(optarg);
1.179 djm 2879: break;
1.237 markus 2880: case 'Z':
1.336 djm 2881: openssh_format_cipher = optarg;
1.237 markus 2882: break;
1.12 markus 2883: case 'C':
2884: identity_comment = optarg;
2885: break;
2886: case 'q':
2887: quiet = 1;
1.20 deraadt 2888: break;
1.57 markus 2889: case 'e':
1.19 markus 2890: case 'x':
1.57 markus 2891: /* export key */
1.193 djm 2892: convert_to = 1;
1.19 markus 2893: break;
1.179 djm 2894: case 'h':
2895: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 2896: certflags_flags = 0;
1.179 djm 2897: break;
1.223 djm 2898: case 'k':
2899: gen_krl = 1;
2900: break;
1.57 markus 2901: case 'i':
1.19 markus 2902: case 'X':
1.57 markus 2903: /* import key */
1.193 djm 2904: convert_from = 1;
1.19 markus 2905: break;
2906: case 'y':
2907: print_public = 1;
2908: break;
1.179 djm 2909: case 's':
2910: ca_key_path = optarg;
2911: break;
1.33 markus 2912: case 't':
2913: key_type_name = optarg;
2914: break;
1.75 markus 2915: case 'D':
1.177 markus 2916: pkcs11provider = optarg;
1.305 djm 2917: break;
2918: case 'U':
2919: prefer_agent = 1;
1.66 markus 2920: break;
1.223 djm 2921: case 'u':
2922: update_krl = 1;
2923: break;
1.113 djm 2924: case 'v':
2925: if (log_level == SYSLOG_LEVEL_INFO)
2926: log_level = SYSLOG_LEVEL_DEBUG1;
2927: else {
1.117 deraadt 2928: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 2929: log_level < SYSLOG_LEVEL_DEBUG3)
2930: log_level++;
2931: }
2932: break;
1.105 jakob 2933: case 'r':
1.119 djm 2934: rr_hostname = optarg;
1.105 jakob 2935: break;
1.107 djm 2936: case 'a':
1.237 markus 2937: rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
1.124 avsm 2938: if (errstr)
1.237 markus 2939: fatal("Invalid number: %s (%s)",
1.124 avsm 2940: optarg, errstr);
1.107 djm 2941: break;
1.274 djm 2942: case 'V':
2943: parse_cert_times(optarg);
2944: break;
1.344 djm 2945: case 'Y':
2946: sign_op = optarg;
2947: break;
1.274 djm 2948: case 'z':
2949: errno = 0;
1.326 djm 2950: if (*optarg == '+') {
2951: cert_serial_autoinc = 1;
2952: optarg++;
2953: }
1.274 djm 2954: cert_serial = strtoull(optarg, &ep, 10);
2955: if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
2956: (errno == ERANGE && cert_serial == ULLONG_MAX))
2957: fatal("Invalid serial number \"%s\"", optarg);
1.107 djm 2958: break;
1.274 djm 2959: #ifdef WITH_OPENSSL
2960: /* Moduli generation/screening */
1.107 djm 2961: case 'G':
2962: do_gen_candidates = 1;
1.124 avsm 2963: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2964: sizeof(out_file))
2965: fatal("Output filename too long");
1.107 djm 2966: break;
1.274 djm 2967: case 'J':
2968: lines_to_process = strtoul(optarg, NULL, 10);
1.292 dtucker 2969: break;
1.274 djm 2970: case 'j':
2971: start_lineno = strtoul(optarg, NULL, 10);
1.292 dtucker 2972: break;
1.211 dtucker 2973: case 'K':
1.253 deraadt 2974: if (strlen(optarg) >= PATH_MAX)
1.211 dtucker 2975: fatal("Checkpoint filename too long");
2976: checkpoint = xstrdup(optarg);
2977: break;
1.274 djm 2978: case 'M':
2979: memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX,
2980: &errstr);
2981: if (errstr)
2982: fatal("Memory limit is %s: %s", errstr, optarg);
2983: break;
1.107 djm 2984: case 'S':
2985: /* XXX - also compare length against bits */
2986: if (BN_hex2bn(&start, optarg) == 0)
2987: fatal("Invalid start point.");
2988: break;
1.274 djm 2989: case 'T':
2990: do_screen_candidates = 1;
2991: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2992: sizeof(out_file))
2993: fatal("Output filename too long");
1.186 djm 2994: break;
1.274 djm 2995: case 'W':
2996: generator_wanted = (u_int32_t)strtonum(optarg, 1,
2997: UINT_MAX, &errstr);
2998: if (errstr != NULL)
2999: fatal("Desired generator invalid: %s (%s)",
3000: optarg, errstr);
1.179 djm 3001: break;
1.274 djm 3002: #endif /* WITH_OPENSSL */
1.12 markus 3003: case '?':
3004: default:
3005: usage();
3006: }
3007: }
1.113 djm 3008:
3009: /* reinit */
1.156 deraadt 3010: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 3011:
1.179 djm 3012: argv += optind;
3013: argc -= optind;
1.344 djm 3014:
3015: if (sign_op != NULL) {
1.354 djm 3016: if (cert_principals == NULL || *cert_principals == '\0') {
1.344 djm 3017: error("Too few arguments for sign/verify: "
3018: "missing namespace");
3019: exit(1);
3020: }
3021: if (strncmp(sign_op, "sign", 4) == 0) {
3022: if (!have_identity) {
3023: error("Too few arguments for sign: "
3024: "missing key");
3025: exit(1);
3026: }
3027: return sign(identity_file, cert_principals, argc, argv);
1.350 djm 3028: } else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
3029: if (ca_key_path == NULL) {
3030: error("Too few arguments for check-novalidate: "
3031: "missing signature file");
3032: exit(1);
3033: }
3034: return verify(ca_key_path, cert_principals,
3035: NULL, NULL, NULL);
1.344 djm 3036: } else if (strncmp(sign_op, "verify", 6) == 0) {
3037: if (ca_key_path == NULL) {
3038: error("Too few arguments for verify: "
3039: "missing signature file");
3040: exit(1);
3041: }
3042: if (!have_identity) {
3043: error("Too few arguments for sign: "
3044: "missing allowed keys file");
3045: exit(1);
3046: }
3047: if (cert_key_id == NULL) {
3048: error("Too few arguments for verify: "
3049: "missing principal ID");
3050: exit(1);
3051: }
3052: return verify(ca_key_path, cert_principals,
3053: cert_key_id, identity_file, rr_hostname);
3054: }
3055: usage();
3056: /* NOTREACHED */
3057: }
1.179 djm 3058:
3059: if (ca_key_path != NULL) {
1.223 djm 3060: if (argc < 1 && !gen_krl) {
1.269 djm 3061: error("Too few arguments.");
1.179 djm 3062: usage();
3063: }
1.223 djm 3064: } else if (argc > 0 && !gen_krl && !check_krl) {
1.269 djm 3065: error("Too many arguments.");
1.87 djm 3066: usage();
3067: }
1.12 markus 3068: if (change_passphrase && change_comment) {
1.269 djm 3069: error("Can only have one of -p and -c.");
1.166 djm 3070: usage();
3071: }
3072: if (print_fingerprint && (delete_host || hash_hosts)) {
1.269 djm 3073: error("Cannot use -l with -H or -R.");
1.12 markus 3074: usage();
1.223 djm 3075: }
1.246 markus 3076: #ifdef WITH_OPENSSL
1.223 djm 3077: if (gen_krl) {
1.325 djm 3078: do_gen_krl(pw, update_krl, ca_key_path,
3079: cert_serial, identity_comment, argc, argv);
1.223 djm 3080: return (0);
3081: }
3082: if (check_krl) {
3083: do_check_krl(pw, argc, argv);
3084: return (0);
1.179 djm 3085: }
1.246 markus 3086: #endif
1.179 djm 3087: if (ca_key_path != NULL) {
3088: if (cert_key_id == NULL)
3089: fatal("Must specify key id (-I) when certifying");
1.326 djm 3090: do_ca_sign(pw, ca_key_path, prefer_agent,
3091: cert_serial, cert_serial_autoinc, argc, argv);
1.12 markus 3092: }
1.182 djm 3093: if (show_cert)
3094: do_show_cert(pw);
1.325 djm 3095: if (delete_host || hash_hosts || find_host) {
3096: do_known_hosts(pw, rr_hostname, find_host,
3097: delete_host, hash_hosts);
3098: }
1.221 djm 3099: if (pkcs11provider != NULL)
3100: do_download(pw);
1.49 markus 3101: if (print_fingerprint || print_bubblebabble)
1.12 markus 3102: do_fingerprint(pw);
3103: if (change_passphrase)
3104: do_change_passphrase(pw);
3105: if (change_comment)
1.325 djm 3106: do_change_comment(pw, identity_comment);
1.246 markus 3107: #ifdef WITH_OPENSSL
1.193 djm 3108: if (convert_to)
3109: do_convert_to(pw);
3110: if (convert_from)
3111: do_convert_from(pw);
1.349 djm 3112: #else /* WITH_OPENSSL */
3113: if (convert_to || convert_from)
3114: fatal("key conversion disabled at compile time");
3115: #endif /* WITH_OPENSSL */
1.19 markus 3116: if (print_public)
3117: do_print_public(pw);
1.119 djm 3118: if (rr_hostname != NULL) {
1.138 jakob 3119: unsigned int n = 0;
3120:
3121: if (have_identity) {
1.325 djm 3122: n = do_print_resource_record(pw, identity_file,
3123: rr_hostname, print_generic);
1.269 djm 3124: if (n == 0)
3125: fatal("%s: %s", identity_file, strerror(errno));
1.138 jakob 3126: exit(0);
3127: } else {
3128:
3129: n += do_print_resource_record(pw,
1.325 djm 3130: _PATH_HOST_RSA_KEY_FILE, rr_hostname,
3131: print_generic);
1.138 jakob 3132: n += do_print_resource_record(pw,
1.325 djm 3133: _PATH_HOST_DSA_KEY_FILE, rr_hostname,
3134: print_generic);
1.214 djm 3135: n += do_print_resource_record(pw,
1.325 djm 3136: _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
3137: print_generic);
1.244 logan 3138: n += do_print_resource_record(pw,
1.325 djm 3139: _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
3140: print_generic);
1.313 markus 3141: n += do_print_resource_record(pw,
1.325 djm 3142: _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
3143: print_generic);
1.138 jakob 3144: if (n == 0)
3145: fatal("no keys found.");
3146: exit(0);
3147: }
1.105 jakob 3148: }
1.107 djm 3149:
1.274 djm 3150: #ifdef WITH_OPENSSL
1.107 djm 3151: if (do_gen_candidates) {
3152: FILE *out = fopen(out_file, "w");
1.111 djm 3153:
1.107 djm 3154: if (out == NULL) {
3155: error("Couldn't open modulus candidate file \"%s\": %s",
3156: out_file, strerror(errno));
3157: return (1);
3158: }
1.130 markus 3159: if (bits == 0)
3160: bits = DEFAULT_BITS;
1.107 djm 3161: if (gen_candidates(out, memory, bits, start) != 0)
1.131 stevesk 3162: fatal("modulus candidate generation failed");
1.107 djm 3163:
3164: return (0);
3165: }
3166:
3167: if (do_screen_candidates) {
3168: FILE *in;
1.225 djm 3169: FILE *out = fopen(out_file, "a");
1.107 djm 3170:
3171: if (have_identity && strcmp(identity_file, "-") != 0) {
3172: if ((in = fopen(identity_file, "r")) == NULL) {
3173: fatal("Couldn't open modulus candidate "
1.111 djm 3174: "file \"%s\": %s", identity_file,
1.107 djm 3175: strerror(errno));
3176: }
3177: } else
3178: in = stdin;
3179:
3180: if (out == NULL) {
3181: fatal("Couldn't open moduli file \"%s\": %s",
3182: out_file, strerror(errno));
3183: }
1.237 markus 3184: if (prime_test(in, out, rounds == 0 ? 100 : rounds,
3185: generator_wanted, checkpoint,
1.215 dtucker 3186: start_lineno, lines_to_process) != 0)
1.131 stevesk 3187: fatal("modulus screening failed");
1.108 markus 3188: return (0);
1.75 markus 3189: }
1.274 djm 3190: #endif
1.12 markus 3191:
1.206 stevesk 3192: if (gen_all_hostkeys) {
3193: do_gen_all_hostkeys(pw);
3194: return (0);
3195: }
3196:
1.133 djm 3197: if (key_type_name == NULL)
1.273 djm 3198: key_type_name = DEFAULT_KEY_TYPE_NAME;
1.133 djm 3199:
1.252 djm 3200: type = sshkey_type_from_name(key_type_name);
1.255 djm 3201: type_bits_valid(type, key_type_name, &bits);
1.206 stevesk 3202:
1.33 markus 3203: if (!quiet)
1.252 djm 3204: printf("Generating public/private %s key pair.\n",
3205: key_type_name);
1.269 djm 3206: if ((r = sshkey_generate(type, bits, &private)) != 0)
1.304 markus 3207: fatal("sshkey_generate failed");
1.269 djm 3208: if ((r = sshkey_from_private(private, &public)) != 0)
1.304 markus 3209: fatal("sshkey_from_private failed: %s\n", ssh_err(r));
1.12 markus 3210:
3211: if (!have_identity)
3212: ask_filename(pw, "Enter file in which to save the key");
3213:
1.132 djm 3214: /* Create ~/.ssh directory if it doesn't already exist. */
1.188 djm 3215: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
3216: pw->pw_dir, _PATH_SSH_USER_DIR);
3217: if (strstr(identity_file, dotsshdir) != NULL) {
1.333 deraadt 3218: if (stat(dotsshdir, &st) == -1) {
1.188 djm 3219: if (errno != ENOENT) {
3220: error("Could not stat %s: %s", dotsshdir,
3221: strerror(errno));
1.333 deraadt 3222: } else if (mkdir(dotsshdir, 0700) == -1) {
1.188 djm 3223: error("Could not create directory '%s': %s",
3224: dotsshdir, strerror(errno));
3225: } else if (!quiet)
3226: printf("Created directory '%s'.\n", dotsshdir);
3227: }
1.12 markus 3228: }
3229: /* If the file already exists, ask the user to confirm. */
1.343 djm 3230: if (!confirm_overwrite(identity_file))
3231: exit(1);
1.12 markus 3232: /* Ask for a passphrase (twice). */
3233: if (identity_passphrase)
3234: passphrase1 = xstrdup(identity_passphrase);
3235: else if (identity_new_passphrase)
3236: passphrase1 = xstrdup(identity_new_passphrase);
3237: else {
3238: passphrase_again:
3239: passphrase1 =
1.65 markus 3240: read_passphrase("Enter passphrase (empty for no "
3241: "passphrase): ", RP_ALLOW_STDIN);
3242: passphrase2 = read_passphrase("Enter same passphrase again: ",
3243: RP_ALLOW_STDIN);
1.12 markus 3244: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 3245: /*
3246: * The passphrases do not match. Clear them and
3247: * retry.
3248: */
1.240 djm 3249: explicit_bzero(passphrase1, strlen(passphrase1));
3250: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 3251: free(passphrase1);
3252: free(passphrase2);
1.12 markus 3253: printf("Passphrases do not match. Try again.\n");
3254: goto passphrase_again;
3255: }
3256: /* Clear the other copy of the passphrase. */
1.240 djm 3257: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 3258: free(passphrase2);
1.12 markus 3259: }
3260:
3261: if (identity_comment) {
3262: strlcpy(comment, identity_comment, sizeof(comment));
3263: } else {
1.172 stevesk 3264: /* Create default comment field for the passphrase. */
1.12 markus 3265: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
3266: }
3267:
3268: /* Save the key with the given passphrase and comment. */
1.252 djm 3269: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 3270: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.269 djm 3271: error("Saving key \"%s\" failed: %s",
1.252 djm 3272: identity_file, ssh_err(r));
1.240 djm 3273: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 3274: free(passphrase1);
1.12 markus 3275: exit(1);
3276: }
3277: /* Clear the passphrase. */
1.240 djm 3278: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 3279: free(passphrase1);
1.12 markus 3280:
3281: /* Clear the private key and the random number generator. */
1.252 djm 3282: sshkey_free(private);
1.12 markus 3283:
3284: if (!quiet)
3285: printf("Your identification has been saved in %s.\n", identity_file);
3286:
3287: strlcat(identity_file, ".pub", sizeof(identity_file));
1.269 djm 3288: if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
3289: fatal("Unable to save public key to %s: %s",
3290: identity_file, strerror(errno));
3291: if ((f = fdopen(fd, "w")) == NULL)
3292: fatal("fdopen %s failed: %s", identity_file, strerror(errno));
1.252 djm 3293: if ((r = sshkey_write(public, f)) != 0)
1.269 djm 3294: error("write key failed: %s", ssh_err(r));
1.19 markus 3295: fprintf(f, " %s\n", comment);
1.311 djm 3296: if (ferror(f) || fclose(f) != 0)
3297: fatal("write public failed: %s", strerror(errno));
1.12 markus 3298:
3299: if (!quiet) {
1.259 djm 3300: fp = sshkey_fingerprint(public, fingerprint_hash,
1.251 djm 3301: SSH_FP_DEFAULT);
1.259 djm 3302: ra = sshkey_fingerprint(public, fingerprint_hash,
1.167 grunk 3303: SSH_FP_RANDOMART);
1.259 djm 3304: if (fp == NULL || ra == NULL)
3305: fatal("sshkey_fingerprint failed");
1.19 markus 3306: printf("Your public key has been saved in %s.\n",
3307: identity_file);
1.12 markus 3308: printf("The key fingerprint is:\n");
1.50 markus 3309: printf("%s %s\n", fp, comment);
1.167 grunk 3310: printf("The key's randomart image is:\n");
3311: printf("%s\n", ra);
1.227 djm 3312: free(ra);
3313: free(fp);
1.12 markus 3314: }
1.19 markus 3315:
1.252 djm 3316: sshkey_free(public);
1.12 markus 3317: exit(0);
1.1 deraadt 3318: }
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