Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.192
1.192 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.191 2010/06/22 04:32:06 djm 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>
1.151 stevesk 18: #include <sys/param.h>
1.19 markus 19:
20: #include <openssl/evp.h>
21: #include <openssl/pem.h>
1.145 stevesk 22:
1.148 stevesk 23: #include <errno.h>
1.147 stevesk 24: #include <fcntl.h>
1.145 stevesk 25: #include <pwd.h>
1.153 stevesk 26: #include <stdio.h>
1.152 stevesk 27: #include <stdlib.h>
1.150 stevesk 28: #include <string.h>
1.149 stevesk 29: #include <unistd.h>
1.1 deraadt 30:
31: #include "xmalloc.h"
1.19 markus 32: #include "key.h"
1.53 markus 33: #include "rsa.h"
1.19 markus 34: #include "authfile.h"
35: #include "uuencode.h"
1.32 markus 36: #include "buffer.h"
1.40 markus 37: #include "pathnames.h"
1.41 markus 38: #include "log.h"
1.114 djm 39: #include "misc.h"
1.119 djm 40: #include "match.h"
41: #include "hostfile.h"
1.146 stevesk 42: #include "dns.h"
1.179 djm 43: #include "ssh2.h"
1.32 markus 44:
1.177 markus 45: #ifdef ENABLE_PKCS11
46: #include "ssh-pkcs11.h"
1.106 djm 47: #endif
1.66 markus 48:
1.130 markus 49: /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
50: #define DEFAULT_BITS 2048
51: #define DEFAULT_BITS_DSA 1024
52: u_int32_t bits = 0;
1.1 deraadt 53:
1.14 markus 54: /*
55: * Flag indicating that we just want to change the passphrase. This can be
56: * set on the command line.
57: */
1.1 deraadt 58: int change_passphrase = 0;
59:
1.14 markus 60: /*
61: * Flag indicating that we just want to change the comment. This can be set
62: * on the command line.
63: */
1.1 deraadt 64: int change_comment = 0;
65:
1.2 provos 66: int quiet = 0;
67:
1.169 grunk 68: int log_level = SYSLOG_LEVEL_INFO;
69:
1.119 djm 70: /* Flag indicating that we want to hash a known_hosts file */
71: int hash_hosts = 0;
72: /* Flag indicating that we want lookup a host in known_hosts file */
73: int find_host = 0;
74: /* Flag indicating that we want to delete a host from a known_hosts file */
75: int delete_host = 0;
76:
1.182 djm 77: /* Flag indicating that we want to show the contents of a certificate */
78: int show_cert = 0;
79:
1.8 markus 80: /* Flag indicating that we just want to see the key fingerprint */
81: int print_fingerprint = 0;
1.49 markus 82: int print_bubblebabble = 0;
1.8 markus 83:
1.10 markus 84: /* The identity file name, given on the command line or entered by the user. */
85: char identity_file[1024];
86: int have_identity = 0;
1.1 deraadt 87:
88: /* This is set to the passphrase if given on the command line. */
89: char *identity_passphrase = NULL;
90:
91: /* This is set to the new passphrase if given on the command line. */
92: char *identity_new_passphrase = NULL;
93:
94: /* This is set to the new comment if given on the command line. */
95: char *identity_comment = NULL;
96:
1.179 djm 97: /* Path to CA key when certifying keys. */
98: char *ca_key_path = NULL;
99:
1.186 djm 100: /* Certificate serial number */
101: long long cert_serial = 0;
102:
1.179 djm 103: /* Key type when certifying */
104: u_int cert_key_type = SSH2_CERT_TYPE_USER;
105:
106: /* "key ID" of signed key */
107: char *cert_key_id = NULL;
108:
109: /* Comma-separated list of principal names for certifying keys */
110: char *cert_principals = NULL;
111:
112: /* Validity period for certificates */
113: u_int64_t cert_valid_from = 0;
114: u_int64_t cert_valid_to = ~0ULL;
115:
1.186 djm 116: /* Certificate options */
1.190 djm 117: #define CERTOPT_X_FWD (1)
118: #define CERTOPT_AGENT_FWD (1<<1)
119: #define CERTOPT_PORT_FWD (1<<2)
120: #define CERTOPT_PTY (1<<3)
121: #define CERTOPT_USER_RC (1<<4)
122: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
123: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
124: u_int32_t certflags_flags = CERTOPT_DEFAULT;
125: char *certflags_command = NULL;
126: char *certflags_src_addr = NULL;
1.179 djm 127:
1.19 markus 128: /* Dump public key file in format used by real and the original SSH 2 */
129: int convert_to_ssh2 = 0;
130: int convert_from_ssh2 = 0;
131: int print_public = 0;
1.105 jakob 132: int print_generic = 0;
1.33 markus 133:
1.87 djm 134: char *key_type_name = NULL;
1.19 markus 135:
1.10 markus 136: /* argv0 */
137: extern char *__progname;
1.1 deraadt 138:
1.19 markus 139: char hostname[MAXHOSTNAMELEN];
140:
1.115 djm 141: /* moduli.c */
1.124 avsm 142: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.115 djm 143: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
144:
1.63 itojun 145: static void
1.10 markus 146: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 147: {
1.12 markus 148: char buf[1024];
1.35 markus 149: char *name = NULL;
150:
1.92 stevesk 151: if (key_type_name == NULL)
1.40 markus 152: name = _PATH_SSH_CLIENT_ID_RSA;
1.140 deraadt 153: else {
1.92 stevesk 154: switch (key_type_from_name(key_type_name)) {
155: case KEY_RSA1:
156: name = _PATH_SSH_CLIENT_IDENTITY;
157: break;
1.186 djm 158: case KEY_DSA_CERT:
159: case KEY_DSA_CERT_V00:
1.92 stevesk 160: case KEY_DSA:
161: name = _PATH_SSH_CLIENT_ID_DSA;
162: break;
1.186 djm 163: case KEY_RSA_CERT:
164: case KEY_RSA_CERT_V00:
1.92 stevesk 165: case KEY_RSA:
166: name = _PATH_SSH_CLIENT_ID_RSA;
167: break;
168: default:
1.173 tobias 169: fprintf(stderr, "bad key type\n");
1.92 stevesk 170: exit(1);
171: break;
172: }
1.140 deraadt 173: }
1.35 markus 174: snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
1.37 markus 175: fprintf(stderr, "%s (%s): ", prompt, identity_file);
1.12 markus 176: if (fgets(buf, sizeof(buf), stdin) == NULL)
177: exit(1);
1.162 gilles 178: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 179: if (strcmp(buf, "") != 0)
180: strlcpy(identity_file, buf, sizeof(identity_file));
181: have_identity = 1;
1.7 markus 182: }
183:
1.63 itojun 184: static Key *
1.61 markus 185: load_identity(char *filename)
1.19 markus 186: {
1.52 markus 187: char *pass;
188: Key *prv;
189:
1.55 markus 190: prv = key_load_private(filename, "", NULL);
1.52 markus 191: if (prv == NULL) {
1.61 markus 192: if (identity_passphrase)
193: pass = xstrdup(identity_passphrase);
194: else
1.65 markus 195: pass = read_passphrase("Enter passphrase: ",
196: RP_ALLOW_STDIN);
1.52 markus 197: prv = key_load_private(filename, pass, NULL);
1.19 markus 198: memset(pass, 0, strlen(pass));
199: xfree(pass);
200: }
1.52 markus 201: return prv;
1.19 markus 202: }
203:
1.32 markus 204: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 205: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 206: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 207: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 208:
1.63 itojun 209: static void
1.19 markus 210: do_convert_to_ssh2(struct passwd *pw)
211: {
1.59 markus 212: Key *k;
1.94 markus 213: u_int len;
1.36 markus 214: u_char *blob;
1.176 djm 215: char comment[61];
1.19 markus 216: struct stat st;
217:
218: if (!have_identity)
219: ask_filename(pw, "Enter file in which the key is");
220: if (stat(identity_file, &st) < 0) {
221: perror(identity_file);
222: exit(1);
223: }
1.59 markus 224: if ((k = key_load_public(identity_file, NULL)) == NULL) {
1.61 markus 225: if ((k = load_identity(identity_file)) == NULL) {
1.59 markus 226: fprintf(stderr, "load failed\n");
227: exit(1);
228: }
1.104 markus 229: }
230: if (k->type == KEY_RSA1) {
231: fprintf(stderr, "version 1 keys are not supported\n");
232: exit(1);
1.19 markus 233: }
1.81 markus 234: if (key_to_blob(k, &blob, &len) <= 0) {
235: fprintf(stderr, "key_to_blob failed\n");
236: exit(1);
237: }
1.176 djm 238: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
239: snprintf(comment, sizeof(comment),
240: "%u-bit %s, converted by %s@%s from OpenSSH",
1.59 markus 241: key_size(k), key_type(k),
1.19 markus 242: pw->pw_name, hostname);
1.176 djm 243:
244: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
245: fprintf(stdout, "Comment: \"%s\"\n", comment);
1.19 markus 246: dump_base64(stdout, blob, len);
1.32 markus 247: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.59 markus 248: key_free(k);
1.21 markus 249: xfree(blob);
1.19 markus 250: exit(0);
251: }
252:
1.63 itojun 253: static void
1.32 markus 254: buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
255: {
1.116 avsm 256: u_int bignum_bits = buffer_get_int(b);
257: u_int bytes = (bignum_bits + 7) / 8;
1.53 markus 258:
1.32 markus 259: if (buffer_len(b) < bytes)
1.53 markus 260: fatal("buffer_get_bignum_bits: input buffer too small: "
261: "need %d have %d", bytes, buffer_len(b));
1.155 markus 262: if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
263: fatal("buffer_get_bignum_bits: BN_bin2bn failed");
1.32 markus 264: buffer_consume(b, bytes);
265: }
266:
1.63 itojun 267: static Key *
1.93 markus 268: do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
1.32 markus 269: {
270: Buffer b;
271: Key *key = NULL;
1.64 markus 272: char *type, *cipher;
1.69 stevesk 273: u_char *sig, data[] = "abcde12345";
1.62 markus 274: int magic, rlen, ktype, i1, i2, i3, i4;
1.64 markus 275: u_int slen;
1.62 markus 276: u_long e;
1.32 markus 277:
278: buffer_init(&b);
279: buffer_append(&b, blob, blen);
280:
1.160 stevesk 281: magic = buffer_get_int(&b);
1.32 markus 282: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
283: error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
284: buffer_free(&b);
285: return NULL;
286: }
1.62 markus 287: i1 = buffer_get_int(&b);
1.32 markus 288: type = buffer_get_string(&b, NULL);
289: cipher = buffer_get_string(&b, NULL);
1.62 markus 290: i2 = buffer_get_int(&b);
291: i3 = buffer_get_int(&b);
292: i4 = buffer_get_int(&b);
1.158 stevesk 293: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 294: if (strcmp(cipher, "none") != 0) {
295: error("unsupported cipher %s", cipher);
296: xfree(cipher);
297: buffer_free(&b);
1.53 markus 298: xfree(type);
1.32 markus 299: return NULL;
300: }
301: xfree(cipher);
302:
1.53 markus 303: if (strstr(type, "dsa")) {
304: ktype = KEY_DSA;
305: } else if (strstr(type, "rsa")) {
306: ktype = KEY_RSA;
307: } else {
1.118 markus 308: buffer_free(&b);
1.53 markus 309: xfree(type);
1.32 markus 310: return NULL;
311: }
1.53 markus 312: key = key_new_private(ktype);
313: xfree(type);
314:
315: switch (key->type) {
316: case KEY_DSA:
317: buffer_get_bignum_bits(&b, key->dsa->p);
318: buffer_get_bignum_bits(&b, key->dsa->g);
319: buffer_get_bignum_bits(&b, key->dsa->q);
320: buffer_get_bignum_bits(&b, key->dsa->pub_key);
321: buffer_get_bignum_bits(&b, key->dsa->priv_key);
322: break;
323: case KEY_RSA:
1.160 stevesk 324: e = buffer_get_char(&b);
1.62 markus 325: debug("e %lx", e);
326: if (e < 30) {
327: e <<= 8;
328: e += buffer_get_char(&b);
329: debug("e %lx", e);
330: e <<= 8;
331: e += buffer_get_char(&b);
332: debug("e %lx", e);
333: }
334: if (!BN_set_word(key->rsa->e, e)) {
1.53 markus 335: buffer_free(&b);
336: key_free(key);
337: return NULL;
338: }
339: buffer_get_bignum_bits(&b, key->rsa->d);
340: buffer_get_bignum_bits(&b, key->rsa->n);
341: buffer_get_bignum_bits(&b, key->rsa->iqmp);
342: buffer_get_bignum_bits(&b, key->rsa->q);
343: buffer_get_bignum_bits(&b, key->rsa->p);
1.68 markus 344: rsa_generate_additional_parameters(key->rsa);
1.53 markus 345: break;
346: }
1.32 markus 347: rlen = buffer_len(&b);
1.85 deraadt 348: if (rlen != 0)
1.53 markus 349: error("do_convert_private_ssh2_from_blob: "
350: "remaining bytes in key blob %d", rlen);
1.32 markus 351: buffer_free(&b);
1.64 markus 352:
353: /* try the key */
354: key_sign(key, &sig, &slen, data, sizeof(data));
355: key_verify(key, sig, slen, data, sizeof(data));
356: xfree(sig);
1.32 markus 357: return key;
358: }
359:
1.137 dtucker 360: static int
361: get_line(FILE *fp, char *line, size_t len)
362: {
363: int c;
364: size_t pos = 0;
365:
366: line[0] = '\0';
367: while ((c = fgetc(fp)) != EOF) {
368: if (pos >= len - 1) {
369: fprintf(stderr, "input line too long.\n");
370: exit(1);
371: }
1.140 deraadt 372: switch (c) {
1.137 dtucker 373: case '\r':
374: c = fgetc(fp);
375: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
376: fprintf(stderr, "unget: %s\n", strerror(errno));
377: exit(1);
378: }
379: return pos;
380: case '\n':
381: return pos;
382: }
383: line[pos++] = c;
384: line[pos] = '\0';
385: }
1.157 stevesk 386: /* We reached EOF */
387: return -1;
1.137 dtucker 388: }
389:
1.63 itojun 390: static void
1.19 markus 391: do_convert_from_ssh2(struct passwd *pw)
392: {
393: Key *k;
394: int blen;
1.98 markus 395: u_int len;
1.137 dtucker 396: char line[1024];
1.80 stevesk 397: u_char blob[8096];
1.19 markus 398: char encoded[8096];
399: struct stat st;
1.32 markus 400: int escaped = 0, private = 0, ok;
1.19 markus 401: FILE *fp;
402:
403: if (!have_identity)
404: ask_filename(pw, "Enter file in which the key is");
405: if (stat(identity_file, &st) < 0) {
406: perror(identity_file);
407: exit(1);
408: }
1.191 djm 409: if ((fp = fopen(identity_file, "r")) == NULL)
410: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 411: encoded[0] = '\0';
1.137 dtucker 412: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
413: if (line[blen - 1] == '\\')
1.25 markus 414: escaped++;
1.19 markus 415: if (strncmp(line, "----", 4) == 0 ||
416: strstr(line, ": ") != NULL) {
1.32 markus 417: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
418: private = 1;
1.64 markus 419: if (strstr(line, " END ") != NULL) {
420: break;
421: }
1.60 markus 422: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 423: continue;
424: }
1.25 markus 425: if (escaped) {
426: escaped--;
1.60 markus 427: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 428: continue;
1.19 markus 429: }
430: strlcat(encoded, line, sizeof(encoded));
431: }
1.98 markus 432: len = strlen(encoded);
433: if (((len % 4) == 3) &&
434: (encoded[len-1] == '=') &&
435: (encoded[len-2] == '=') &&
436: (encoded[len-3] == '='))
437: encoded[len-3] = '\0';
1.91 stevesk 438: blen = uudecode(encoded, blob, sizeof(blob));
1.19 markus 439: if (blen < 0) {
440: fprintf(stderr, "uudecode failed.\n");
441: exit(1);
442: }
1.32 markus 443: k = private ?
444: do_convert_private_ssh2_from_blob(blob, blen) :
1.33 markus 445: key_from_blob(blob, blen);
1.32 markus 446: if (k == NULL) {
447: fprintf(stderr, "decode blob failed.\n");
448: exit(1);
449: }
450: ok = private ?
1.53 markus 451: (k->type == KEY_DSA ?
452: PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
453: PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
1.32 markus 454: key_write(k, stdout);
455: if (!ok) {
1.173 tobias 456: fprintf(stderr, "key write failed\n");
1.32 markus 457: exit(1);
458: }
1.19 markus 459: key_free(k);
1.90 markus 460: if (!private)
461: fprintf(stdout, "\n");
1.19 markus 462: fclose(fp);
463: exit(0);
464: }
465:
1.63 itojun 466: static void
1.19 markus 467: do_print_public(struct passwd *pw)
468: {
1.52 markus 469: Key *prv;
1.19 markus 470: struct stat st;
471:
472: if (!have_identity)
473: ask_filename(pw, "Enter file in which the key is");
474: if (stat(identity_file, &st) < 0) {
475: perror(identity_file);
476: exit(1);
477: }
1.61 markus 478: prv = load_identity(identity_file);
1.52 markus 479: if (prv == NULL) {
1.19 markus 480: fprintf(stderr, "load failed\n");
481: exit(1);
482: }
1.52 markus 483: if (!key_write(prv, stdout))
1.19 markus 484: fprintf(stderr, "key_write failed");
1.52 markus 485: key_free(prv);
1.19 markus 486: fprintf(stdout, "\n");
487: exit(0);
488: }
489:
1.66 markus 490: static void
1.178 djm 491: do_download(struct passwd *pw, char *pkcs11provider)
1.75 markus 492: {
1.177 markus 493: #ifdef ENABLE_PKCS11
1.97 markus 494: Key **keys = NULL;
1.177 markus 495: int i, nkeys;
1.75 markus 496:
1.177 markus 497: pkcs11_init(0);
498: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
499: if (nkeys <= 0)
500: fatal("cannot read public key from pkcs11");
501: for (i = 0; i < nkeys; i++) {
1.97 markus 502: key_write(keys[i], stdout);
503: key_free(keys[i]);
504: fprintf(stdout, "\n");
505: }
506: xfree(keys);
1.177 markus 507: pkcs11_terminate();
1.75 markus 508: exit(0);
1.177 markus 509: #else
510: fatal("no pkcs11 support");
511: #endif /* ENABLE_PKCS11 */
1.75 markus 512: }
1.66 markus 513:
1.63 itojun 514: static void
1.8 markus 515: do_fingerprint(struct passwd *pw)
516: {
1.15 markus 517: FILE *f;
1.19 markus 518: Key *public;
1.167 grunk 519: char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
1.165 djm 520: int i, skip = 0, num = 0, invalid = 1;
1.84 stevesk 521: enum fp_rep rep;
522: enum fp_type fptype;
1.12 markus 523: struct stat st;
524:
1.52 markus 525: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
526: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 527:
1.12 markus 528: if (!have_identity)
529: ask_filename(pw, "Enter file in which the key is");
530: if (stat(identity_file, &st) < 0) {
531: perror(identity_file);
532: exit(1);
533: }
1.52 markus 534: public = key_load_public(identity_file, &comment);
535: if (public != NULL) {
536: fp = key_fingerprint(public, fptype, rep);
1.175 djm 537: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
1.170 grunk 538: printf("%u %s %s (%s)\n", key_size(public), fp, comment,
539: key_type(public));
1.169 grunk 540: if (log_level >= SYSLOG_LEVEL_VERBOSE)
541: printf("%s\n", ra);
1.33 markus 542: key_free(public);
543: xfree(comment);
1.167 grunk 544: xfree(ra);
1.49 markus 545: xfree(fp);
1.15 markus 546: exit(0);
547: }
1.144 markus 548: if (comment) {
1.52 markus 549: xfree(comment);
1.144 markus 550: comment = NULL;
551: }
1.15 markus 552:
1.191 djm 553: if ((f = fopen(identity_file, "r")) == NULL)
554: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
555:
556: while (fgets(line, sizeof(line), f)) {
557: if ((cp = strchr(line, '\n')) == NULL) {
558: error("line %d too long: %.40s...",
559: num + 1, line);
560: skip = 1;
561: continue;
562: }
563: num++;
564: if (skip) {
565: skip = 0;
566: continue;
567: }
568: *cp = '\0';
569:
570: /* Skip leading whitespace, empty and comment lines. */
571: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
572: ;
573: if (!*cp || *cp == '\n' || *cp == '#')
574: continue;
575: i = strtol(cp, &ep, 10);
576: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
577: int quoted = 0;
578: comment = cp;
579: for (; *cp && (quoted || (*cp != ' ' &&
580: *cp != '\t')); cp++) {
581: if (*cp == '\\' && cp[1] == '"')
582: cp++; /* Skip both */
583: else if (*cp == '"')
584: quoted = !quoted;
1.15 markus 585: }
1.191 djm 586: if (!*cp)
1.15 markus 587: continue;
1.191 djm 588: *cp++ = '\0';
589: }
590: ep = cp;
591: public = key_new(KEY_RSA1);
592: if (key_read(public, &cp) != 1) {
593: cp = ep;
594: key_free(public);
595: public = key_new(KEY_UNSPEC);
1.38 markus 596: if (key_read(public, &cp) != 1) {
597: key_free(public);
1.191 djm 598: continue;
1.12 markus 599: }
600: }
1.191 djm 601: comment = *cp ? cp : comment;
602: fp = key_fingerprint(public, fptype, rep);
603: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
604: printf("%u %s %s (%s)\n", key_size(public), fp,
605: comment ? comment : "no comment", key_type(public));
606: if (log_level >= SYSLOG_LEVEL_VERBOSE)
607: printf("%s\n", ra);
608: xfree(ra);
609: xfree(fp);
610: key_free(public);
611: invalid = 0;
1.15 markus 612: }
1.191 djm 613: fclose(f);
614:
1.15 markus 615: if (invalid) {
1.83 markus 616: printf("%s is not a public key file.\n", identity_file);
1.15 markus 617: exit(1);
1.12 markus 618: }
619: exit(0);
1.8 markus 620: }
621:
1.119 djm 622: static void
1.179 djm 623: printhost(FILE *f, const char *name, Key *public, int ca, int hash)
1.119 djm 624: {
1.166 djm 625: if (print_fingerprint) {
626: enum fp_rep rep;
627: enum fp_type fptype;
1.167 grunk 628: char *fp, *ra;
1.166 djm 629:
630: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
631: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
632: fp = key_fingerprint(public, fptype, rep);
1.175 djm 633: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
1.171 sthen 634: printf("%u %s %s (%s)\n", key_size(public), fp, name,
635: key_type(public));
636: if (log_level >= SYSLOG_LEVEL_VERBOSE)
637: printf("%s\n", ra);
1.167 grunk 638: xfree(ra);
1.166 djm 639: xfree(fp);
640: } else {
641: if (hash && (name = host_hash(name, NULL, 0)) == NULL)
642: fatal("hash_host failed");
1.179 djm 643: fprintf(f, "%s%s%s ", ca ? CA_MARKER : "", ca ? " " : "", name);
1.166 djm 644: if (!key_write(public, f))
645: fatal("key_write failed");
646: fprintf(f, "\n");
647: }
1.119 djm 648: }
649:
650: static void
651: do_known_hosts(struct passwd *pw, const char *name)
652: {
653: FILE *in, *out = stdout;
1.179 djm 654: Key *pub;
1.119 djm 655: char *cp, *cp2, *kp, *kp2;
656: char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
1.165 djm 657: int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
1.179 djm 658: int ca;
1.119 djm 659:
660: if (!have_identity) {
661: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
662: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
663: sizeof(identity_file))
664: fatal("Specified known hosts path too long");
665: xfree(cp);
666: have_identity = 1;
667: }
668: if ((in = fopen(identity_file, "r")) == NULL)
1.191 djm 669: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.119 djm 670:
671: /*
672: * Find hosts goes to stdout, hash and deletions happen in-place
673: * A corner case is ssh-keygen -HF foo, which should go to stdout
674: */
675: if (!find_host && (hash_hosts || delete_host)) {
676: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
677: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
678: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
679: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
680: fatal("known_hosts path too long");
681: umask(077);
682: if ((c = mkstemp(tmp)) == -1)
683: fatal("mkstemp: %s", strerror(errno));
684: if ((out = fdopen(c, "w")) == NULL) {
685: c = errno;
686: unlink(tmp);
687: fatal("fdopen: %s", strerror(c));
688: }
689: inplace = 1;
690: }
691:
692: while (fgets(line, sizeof(line), in)) {
1.163 chl 693: if ((cp = strchr(line, '\n')) == NULL) {
1.165 djm 694: error("line %d too long: %.40s...", num + 1, line);
1.119 djm 695: skip = 1;
696: invalid = 1;
697: continue;
698: }
1.163 chl 699: num++;
1.119 djm 700: if (skip) {
701: skip = 0;
702: continue;
703: }
1.163 chl 704: *cp = '\0';
1.119 djm 705:
706: /* Skip leading whitespace, empty and comment lines. */
707: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
708: ;
709: if (!*cp || *cp == '\n' || *cp == '#') {
710: if (inplace)
711: fprintf(out, "%s\n", cp);
712: continue;
713: }
1.179 djm 714: /* Check whether this is a CA key */
715: if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 &&
716: (cp[sizeof(CA_MARKER) - 1] == ' ' ||
717: cp[sizeof(CA_MARKER) - 1] == '\t')) {
718: ca = 1;
719: cp += sizeof(CA_MARKER);
720: } else
721: ca = 0;
722:
1.119 djm 723: /* Find the end of the host name portion. */
724: for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
725: ;
1.179 djm 726:
1.119 djm 727: if (*kp == '\0' || *(kp + 1) == '\0') {
728: error("line %d missing key: %.40s...",
729: num, line);
730: invalid = 1;
731: continue;
732: }
733: *kp++ = '\0';
734: kp2 = kp;
735:
1.179 djm 736: pub = key_new(KEY_RSA1);
737: if (key_read(pub, &kp) != 1) {
1.119 djm 738: kp = kp2;
1.179 djm 739: key_free(pub);
740: pub = key_new(KEY_UNSPEC);
741: if (key_read(pub, &kp) != 1) {
1.119 djm 742: error("line %d invalid key: %.40s...",
743: num, line);
1.179 djm 744: key_free(pub);
1.119 djm 745: invalid = 1;
746: continue;
747: }
748: }
749:
750: if (*cp == HASH_DELIM) {
751: if (find_host || delete_host) {
752: cp2 = host_hash(name, cp, strlen(cp));
753: if (cp2 == NULL) {
754: error("line %d: invalid hashed "
755: "name: %.64s...", num, line);
756: invalid = 1;
757: continue;
758: }
759: c = (strcmp(cp2, cp) == 0);
760: if (find_host && c) {
761: printf("# Host %s found: "
1.179 djm 762: "line %d type %s%s\n", name,
763: num, key_type(pub),
764: ca ? " (CA key)" : "");
765: printhost(out, cp, pub, ca, 0);
1.119 djm 766: }
1.179 djm 767: if (delete_host && !c && !ca)
768: printhost(out, cp, pub, ca, 0);
1.119 djm 769: } else if (hash_hosts)
1.179 djm 770: printhost(out, cp, pub, ca, 0);
1.119 djm 771: } else {
772: if (find_host || delete_host) {
773: c = (match_hostname(name, cp,
774: strlen(cp)) == 1);
775: if (find_host && c) {
776: printf("# Host %s found: "
1.179 djm 777: "line %d type %s%s\n", name,
778: num, key_type(pub),
779: ca ? " (CA key)" : "");
780: printhost(out, name, pub,
781: ca, hash_hosts && !ca);
1.119 djm 782: }
1.179 djm 783: if (delete_host && !c && !ca)
784: printhost(out, cp, pub, ca, 0);
1.119 djm 785: } else if (hash_hosts) {
1.121 deraadt 786: for (cp2 = strsep(&cp, ",");
1.119 djm 787: cp2 != NULL && *cp2 != '\0';
1.120 djm 788: cp2 = strsep(&cp, ",")) {
1.179 djm 789: if (ca) {
790: fprintf(stderr, "Warning: "
791: "ignoring CA key for host: "
792: "%.64s\n", cp2);
793: printhost(out, cp2, pub, ca, 0);
794: } else if (strcspn(cp2, "*?!") !=
795: strlen(cp2)) {
1.120 djm 796: fprintf(stderr, "Warning: "
797: "ignoring host name with "
798: "metacharacters: %.64s\n",
799: cp2);
1.179 djm 800: printhost(out, cp2, pub, ca, 0);
801: } else
802: printhost(out, cp2, pub, ca, 1);
1.120 djm 803: }
1.119 djm 804: has_unhashed = 1;
805: }
806: }
1.179 djm 807: key_free(pub);
1.119 djm 808: }
809: fclose(in);
810:
811: if (invalid) {
1.165 djm 812: fprintf(stderr, "%s is not a valid known_hosts file.\n",
1.119 djm 813: identity_file);
814: if (inplace) {
815: fprintf(stderr, "Not replacing existing known_hosts "
1.122 markus 816: "file because of errors\n");
1.119 djm 817: fclose(out);
818: unlink(tmp);
819: }
820: exit(1);
821: }
822:
823: if (inplace) {
824: fclose(out);
825:
826: /* Backup existing file */
827: if (unlink(old) == -1 && errno != ENOENT)
828: fatal("unlink %.100s: %s", old, strerror(errno));
829: if (link(identity_file, old) == -1)
830: fatal("link %.100s to %.100s: %s", identity_file, old,
831: strerror(errno));
832: /* Move new one into place */
833: if (rename(tmp, identity_file) == -1) {
834: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
835: strerror(errno));
836: unlink(tmp);
837: unlink(old);
838: exit(1);
839: }
840:
841: fprintf(stderr, "%s updated.\n", identity_file);
842: fprintf(stderr, "Original contents retained as %s\n", old);
843: if (has_unhashed) {
844: fprintf(stderr, "WARNING: %s contains unhashed "
845: "entries\n", old);
846: fprintf(stderr, "Delete this file to ensure privacy "
1.128 djm 847: "of hostnames\n");
1.119 djm 848: }
849: }
850:
851: exit(0);
852: }
853:
1.13 deraadt 854: /*
855: * Perform changing a passphrase. The argument is the passwd structure
856: * for the current user.
857: */
1.63 itojun 858: static void
1.7 markus 859: do_change_passphrase(struct passwd *pw)
860: {
1.12 markus 861: char *comment;
862: char *old_passphrase, *passphrase1, *passphrase2;
863: struct stat st;
1.19 markus 864: Key *private;
1.12 markus 865:
866: if (!have_identity)
867: ask_filename(pw, "Enter file in which the key is");
868: if (stat(identity_file, &st) < 0) {
869: perror(identity_file);
870: exit(1);
871: }
872: /* Try to load the file with empty passphrase. */
1.52 markus 873: private = key_load_private(identity_file, "", &comment);
874: if (private == NULL) {
1.12 markus 875: if (identity_passphrase)
876: old_passphrase = xstrdup(identity_passphrase);
877: else
1.65 markus 878: old_passphrase =
879: read_passphrase("Enter old passphrase: ",
880: RP_ALLOW_STDIN);
881: private = key_load_private(identity_file, old_passphrase,
882: &comment);
1.52 markus 883: memset(old_passphrase, 0, strlen(old_passphrase));
884: xfree(old_passphrase);
885: if (private == NULL) {
1.12 markus 886: printf("Bad passphrase.\n");
887: exit(1);
888: }
889: }
890: printf("Key has comment '%s'\n", comment);
891:
892: /* Ask the new passphrase (twice). */
893: if (identity_new_passphrase) {
894: passphrase1 = xstrdup(identity_new_passphrase);
895: passphrase2 = NULL;
896: } else {
897: passphrase1 =
1.65 markus 898: read_passphrase("Enter new passphrase (empty for no "
899: "passphrase): ", RP_ALLOW_STDIN);
900: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 901: RP_ALLOW_STDIN);
1.12 markus 902:
903: /* Verify that they are the same. */
904: if (strcmp(passphrase1, passphrase2) != 0) {
905: memset(passphrase1, 0, strlen(passphrase1));
906: memset(passphrase2, 0, strlen(passphrase2));
907: xfree(passphrase1);
908: xfree(passphrase2);
909: printf("Pass phrases do not match. Try again.\n");
910: exit(1);
911: }
912: /* Destroy the other copy. */
913: memset(passphrase2, 0, strlen(passphrase2));
914: xfree(passphrase2);
915: }
916:
917: /* Save the file using the new passphrase. */
1.52 markus 918: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 919: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 920: memset(passphrase1, 0, strlen(passphrase1));
921: xfree(passphrase1);
1.19 markus 922: key_free(private);
1.12 markus 923: xfree(comment);
924: exit(1);
925: }
926: /* Destroy the passphrase and the copy of the key in memory. */
927: memset(passphrase1, 0, strlen(passphrase1));
928: xfree(passphrase1);
1.19 markus 929: key_free(private); /* Destroys contents */
1.12 markus 930: xfree(comment);
1.1 deraadt 931:
1.12 markus 932: printf("Your identification has been saved with the new passphrase.\n");
933: exit(0);
1.1 deraadt 934: }
935:
1.105 jakob 936: /*
937: * Print the SSHFP RR.
938: */
1.138 jakob 939: static int
940: do_print_resource_record(struct passwd *pw, char *fname, char *hname)
1.105 jakob 941: {
942: Key *public;
943: char *comment = NULL;
944: struct stat st;
945:
1.138 jakob 946: if (fname == NULL)
1.105 jakob 947: ask_filename(pw, "Enter file in which the key is");
1.138 jakob 948: if (stat(fname, &st) < 0) {
949: if (errno == ENOENT)
950: return 0;
951: perror(fname);
1.105 jakob 952: exit(1);
953: }
1.138 jakob 954: public = key_load_public(fname, &comment);
1.105 jakob 955: if (public != NULL) {
1.116 avsm 956: export_dns_rr(hname, public, stdout, print_generic);
1.105 jakob 957: key_free(public);
958: xfree(comment);
1.138 jakob 959: return 1;
1.105 jakob 960: }
961: if (comment)
962: xfree(comment);
963:
1.138 jakob 964: printf("failed to read v2 public key from %s.\n", fname);
1.105 jakob 965: exit(1);
966: }
967:
1.13 deraadt 968: /*
969: * Change the comment of a private key file.
970: */
1.63 itojun 971: static void
1.2 provos 972: do_change_comment(struct passwd *pw)
1.1 deraadt 973: {
1.46 deraadt 974: char new_comment[1024], *comment, *passphrase;
1.52 markus 975: Key *private;
976: Key *public;
1.12 markus 977: struct stat st;
978: FILE *f;
1.46 deraadt 979: int fd;
1.12 markus 980:
981: if (!have_identity)
982: ask_filename(pw, "Enter file in which the key is");
983: if (stat(identity_file, &st) < 0) {
984: perror(identity_file);
985: exit(1);
986: }
1.52 markus 987: private = key_load_private(identity_file, "", &comment);
988: if (private == NULL) {
1.12 markus 989: if (identity_passphrase)
990: passphrase = xstrdup(identity_passphrase);
991: else if (identity_new_passphrase)
992: passphrase = xstrdup(identity_new_passphrase);
993: else
1.65 markus 994: passphrase = read_passphrase("Enter passphrase: ",
995: RP_ALLOW_STDIN);
1.12 markus 996: /* Try to load using the passphrase. */
1.52 markus 997: private = key_load_private(identity_file, passphrase, &comment);
998: if (private == NULL) {
1.12 markus 999: memset(passphrase, 0, strlen(passphrase));
1000: xfree(passphrase);
1001: printf("Bad passphrase.\n");
1002: exit(1);
1003: }
1.52 markus 1004: } else {
1005: passphrase = xstrdup("");
1.12 markus 1006: }
1.52 markus 1007: if (private->type != KEY_RSA1) {
1008: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
1009: key_free(private);
1010: exit(1);
1.86 deraadt 1011: }
1.12 markus 1012: printf("Key now has comment '%s'\n", comment);
1013:
1014: if (identity_comment) {
1015: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1016: } else {
1017: printf("Enter new comment: ");
1018: fflush(stdout);
1019: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1020: memset(passphrase, 0, strlen(passphrase));
1.19 markus 1021: key_free(private);
1.12 markus 1022: exit(1);
1023: }
1.162 gilles 1024: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1025: }
1026:
1027: /* Save the file using the new passphrase. */
1.52 markus 1028: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 1029: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1030: memset(passphrase, 0, strlen(passphrase));
1031: xfree(passphrase);
1.19 markus 1032: key_free(private);
1.12 markus 1033: xfree(comment);
1034: exit(1);
1035: }
1036: memset(passphrase, 0, strlen(passphrase));
1037: xfree(passphrase);
1.52 markus 1038: public = key_from_private(private);
1.19 markus 1039: key_free(private);
1.12 markus 1040:
1041: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1042: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1043: if (fd == -1) {
1.12 markus 1044: printf("Could not save your public key in %s\n", identity_file);
1045: exit(1);
1046: }
1.46 deraadt 1047: f = fdopen(fd, "w");
1048: if (f == NULL) {
1.173 tobias 1049: printf("fdopen %s failed\n", identity_file);
1.46 deraadt 1050: exit(1);
1051: }
1.19 markus 1052: if (!key_write(public, f))
1.173 tobias 1053: fprintf(stderr, "write key failed\n");
1.19 markus 1054: key_free(public);
1055: fprintf(f, " %s\n", new_comment);
1.12 markus 1056: fclose(f);
1.1 deraadt 1057:
1.12 markus 1058: xfree(comment);
1.1 deraadt 1059:
1.12 markus 1060: printf("The comment in your key file has been changed.\n");
1061: exit(0);
1.1 deraadt 1062: }
1063:
1.179 djm 1064: static const char *
1.182 djm 1065: fmt_validity(u_int64_t valid_from, u_int64_t valid_to)
1.179 djm 1066: {
1067: char from[32], to[32];
1068: static char ret[64];
1069: time_t tt;
1070: struct tm *tm;
1071:
1072: *from = *to = '\0';
1.182 djm 1073: if (valid_from == 0 && valid_to == 0xffffffffffffffffULL)
1.179 djm 1074: return "forever";
1075:
1.182 djm 1076: if (valid_from != 0) {
1.179 djm 1077: /* XXX revisit INT_MAX in 2038 :) */
1.182 djm 1078: tt = valid_from > INT_MAX ? INT_MAX : valid_from;
1.179 djm 1079: tm = localtime(&tt);
1080: strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
1081: }
1.182 djm 1082: if (valid_to != 0xffffffffffffffffULL) {
1.179 djm 1083: /* XXX revisit INT_MAX in 2038 :) */
1.182 djm 1084: tt = valid_to > INT_MAX ? INT_MAX : valid_to;
1.179 djm 1085: tm = localtime(&tt);
1086: strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
1087: }
1088:
1.182 djm 1089: if (valid_from == 0) {
1.179 djm 1090: snprintf(ret, sizeof(ret), "before %s", to);
1091: return ret;
1092: }
1.182 djm 1093: if (valid_to == 0xffffffffffffffffULL) {
1.179 djm 1094: snprintf(ret, sizeof(ret), "after %s", from);
1095: return ret;
1096: }
1097:
1098: snprintf(ret, sizeof(ret), "from %s to %s", from, to);
1099: return ret;
1100: }
1101:
1102: static void
1.186 djm 1103: add_flag_option(Buffer *c, const char *name)
1.179 djm 1104: {
1105: debug3("%s: %s", __func__, name);
1106: buffer_put_cstring(c, name);
1107: buffer_put_string(c, NULL, 0);
1108: }
1109:
1110: static void
1.186 djm 1111: add_string_option(Buffer *c, const char *name, const char *value)
1.179 djm 1112: {
1113: Buffer b;
1114:
1115: debug3("%s: %s=%s", __func__, name, value);
1116: buffer_init(&b);
1117: buffer_put_cstring(&b, value);
1118:
1119: buffer_put_cstring(c, name);
1120: buffer_put_string(c, buffer_ptr(&b), buffer_len(&b));
1121:
1122: buffer_free(&b);
1123: }
1124:
1.190 djm 1125: #define OPTIONS_CRITICAL 1
1126: #define OPTIONS_EXTENSIONS 2
1.179 djm 1127: static void
1.190 djm 1128: prepare_options_buf(Buffer *c, int which)
1.179 djm 1129: {
1130: buffer_clear(c);
1.190 djm 1131: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1132: (certflags_flags & CERTOPT_X_FWD) != 0)
1.186 djm 1133: add_flag_option(c, "permit-X11-forwarding");
1.190 djm 1134: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1135: (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1.186 djm 1136: add_flag_option(c, "permit-agent-forwarding");
1.190 djm 1137: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1138: (certflags_flags & CERTOPT_PORT_FWD) != 0)
1.186 djm 1139: add_flag_option(c, "permit-port-forwarding");
1.190 djm 1140: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1141: (certflags_flags & CERTOPT_PTY) != 0)
1.186 djm 1142: add_flag_option(c, "permit-pty");
1.190 djm 1143: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1144: (certflags_flags & CERTOPT_USER_RC) != 0)
1.186 djm 1145: add_flag_option(c, "permit-user-rc");
1.190 djm 1146: if ((which & OPTIONS_CRITICAL) != 0 &&
1147: certflags_command != NULL)
1148: add_string_option(c, "force-command", certflags_command);
1149: if ((which & OPTIONS_CRITICAL) != 0 &&
1150: certflags_src_addr != NULL)
1151: add_string_option(c, "source-address", certflags_src_addr);
1.179 djm 1152: }
1153:
1154: static void
1155: do_ca_sign(struct passwd *pw, int argc, char **argv)
1156: {
1157: int i, fd;
1158: u_int n;
1159: Key *ca, *public;
1160: char *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1161: FILE *f;
1.186 djm 1162: int v00 = 0; /* legacy keys */
1.179 djm 1163:
1164: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1165: if ((ca = load_identity(tmp)) == NULL)
1166: fatal("Couldn't load CA key \"%s\"", tmp);
1167: xfree(tmp);
1168:
1.186 djm 1169: if (key_type_name != NULL) {
1170: switch (key_type_from_name(key_type_name)) {
1171: case KEY_RSA_CERT_V00:
1172: case KEY_DSA_CERT_V00:
1173: v00 = 1;
1174: break;
1175: case KEY_UNSPEC:
1176: if (strcasecmp(key_type_name, "v00") == 0) {
1177: v00 = 1;
1178: break;
1179: } else if (strcasecmp(key_type_name, "v01") == 0)
1180: break;
1181: /* FALLTHROUGH */
1182: default:
1183: fprintf(stderr, "unknown key type %s\n", key_type_name);
1184: exit(1);
1185: }
1186: }
1187:
1.179 djm 1188: for (i = 0; i < argc; i++) {
1189: /* Split list of principals */
1190: n = 0;
1191: if (cert_principals != NULL) {
1192: otmp = tmp = xstrdup(cert_principals);
1193: plist = NULL;
1194: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1195: plist = xrealloc(plist, n + 1, sizeof(*plist));
1196: if (*(plist[n] = xstrdup(cp)) == '\0')
1197: fatal("Empty principal name");
1198: }
1199: xfree(otmp);
1200: }
1201:
1202: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1203: if ((public = key_load_public(tmp, &comment)) == NULL)
1204: fatal("%s: unable to open \"%s\"", __func__, tmp);
1205: if (public->type != KEY_RSA && public->type != KEY_DSA)
1206: fatal("%s: key \"%s\" type %s cannot be certified",
1207: __func__, tmp, key_type(public));
1208:
1209: /* Prepare certificate to sign */
1.186 djm 1210: if (key_to_certified(public, v00) != 0)
1.179 djm 1211: fatal("Could not upgrade key %s to certificate", tmp);
1212: public->cert->type = cert_key_type;
1.186 djm 1213: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1214: public->cert->key_id = xstrdup(cert_key_id);
1215: public->cert->nprincipals = n;
1216: public->cert->principals = plist;
1217: public->cert->valid_after = cert_valid_from;
1218: public->cert->valid_before = cert_valid_to;
1.190 djm 1219: if (v00) {
1220: prepare_options_buf(&public->cert->critical,
1221: OPTIONS_CRITICAL|OPTIONS_EXTENSIONS);
1222: } else {
1223: prepare_options_buf(&public->cert->critical,
1224: OPTIONS_CRITICAL);
1225: prepare_options_buf(&public->cert->extensions,
1226: OPTIONS_EXTENSIONS);
1227: }
1.179 djm 1228: public->cert->signature_key = key_from_private(ca);
1229:
1230: if (key_certify(public, ca) != 0)
1231: fatal("Couldn't not certify key %s", tmp);
1232:
1233: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1234: *cp = '\0';
1235: xasprintf(&out, "%s-cert.pub", tmp);
1236: xfree(tmp);
1237:
1238: if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1239: fatal("Could not open \"%s\" for writing: %s", out,
1240: strerror(errno));
1241: if ((f = fdopen(fd, "w")) == NULL)
1242: fatal("%s: fdopen: %s", __func__, strerror(errno));
1243: if (!key_write(public, f))
1244: fatal("Could not write certified key to %s", out);
1245: fprintf(f, " %s\n", comment);
1246: fclose(f);
1247:
1.186 djm 1248: if (!quiet) {
1249: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1250: "valid %s", key_cert_type(public),
1251: out, public->cert->key_id, public->cert->serial,
1.179 djm 1252: cert_principals != NULL ? " for " : "",
1253: cert_principals != NULL ? cert_principals : "",
1.182 djm 1254: fmt_validity(cert_valid_from, cert_valid_to));
1.186 djm 1255: }
1.179 djm 1256:
1257: key_free(public);
1258: xfree(out);
1259: }
1260: exit(0);
1261: }
1262:
1263: static u_int64_t
1264: parse_relative_time(const char *s, time_t now)
1265: {
1266: int64_t mul, secs;
1267:
1268: mul = *s == '-' ? -1 : 1;
1269:
1270: if ((secs = convtime(s + 1)) == -1)
1271: fatal("Invalid relative certificate time %s", s);
1272: if (mul == -1 && secs > now)
1273: fatal("Certificate time %s cannot be represented", s);
1274: return now + (u_int64_t)(secs * mul);
1275: }
1276:
1277: static u_int64_t
1278: parse_absolute_time(const char *s)
1279: {
1280: struct tm tm;
1281: time_t tt;
1.180 djm 1282: char buf[32], *fmt;
1.179 djm 1283:
1.180 djm 1284: /*
1285: * POSIX strptime says "The application shall ensure that there
1286: * is white-space or other non-alphanumeric characters between
1287: * any two conversion specifications" so arrange things this way.
1288: */
1289: switch (strlen(s)) {
1290: case 8:
1.184 djm 1291: fmt = "%Y-%m-%d";
1292: snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
1.180 djm 1293: break;
1294: case 14:
1.184 djm 1295: fmt = "%Y-%m-%dT%H:%M:%S";
1296: snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
1.180 djm 1297: s, s + 4, s + 6, s + 8, s + 10, s + 12);
1298: break;
1299: default:
1.179 djm 1300: fatal("Invalid certificate time format %s", s);
1.180 djm 1301: }
1.179 djm 1302:
1303: bzero(&tm, sizeof(tm));
1.180 djm 1304: if (strptime(buf, fmt, &tm) == NULL)
1.179 djm 1305: fatal("Invalid certificate time %s", s);
1306: if ((tt = mktime(&tm)) < 0)
1307: fatal("Certificate time %s cannot be represented", s);
1308: return (u_int64_t)tt;
1309: }
1310:
1311: static void
1312: parse_cert_times(char *timespec)
1313: {
1314: char *from, *to;
1315: time_t now = time(NULL);
1316: int64_t secs;
1317:
1318: /* +timespec relative to now */
1319: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1320: if ((secs = convtime(timespec + 1)) == -1)
1321: fatal("Invalid relative certificate life %s", timespec);
1322: cert_valid_to = now + secs;
1323: /*
1324: * Backdate certificate one minute to avoid problems on hosts
1325: * with poorly-synchronised clocks.
1326: */
1327: cert_valid_from = ((now - 59)/ 60) * 60;
1328: return;
1329: }
1330:
1331: /*
1332: * from:to, where
1333: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1334: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1335: */
1336: from = xstrdup(timespec);
1337: to = strchr(from, ':');
1338: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1339: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1340: *to++ = '\0';
1341:
1342: if (*from == '-' || *from == '+')
1343: cert_valid_from = parse_relative_time(from, now);
1344: else
1345: cert_valid_from = parse_absolute_time(from);
1346:
1347: if (*to == '-' || *to == '+')
1348: cert_valid_to = parse_relative_time(to, cert_valid_from);
1349: else
1350: cert_valid_to = parse_absolute_time(to);
1351:
1352: if (cert_valid_to <= cert_valid_from)
1353: fatal("Empty certificate validity interval");
1354: xfree(from);
1355: }
1356:
1357: static void
1.186 djm 1358: add_cert_option(char *opt)
1.179 djm 1359: {
1360: char *val;
1361:
1362: if (strcmp(opt, "clear") == 0)
1.190 djm 1363: certflags_flags = 0;
1.179 djm 1364: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1365: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1366: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1367: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1368: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1369: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1370: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1371: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1372: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1373: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1374: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1375: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1376: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1377: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1378: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 1379: certflags_flags |= CERTOPT_PTY;
1.179 djm 1380: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 1381: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 1382: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 1383: certflags_flags |= CERTOPT_USER_RC;
1.179 djm 1384: else if (strncasecmp(opt, "force-command=", 14) == 0) {
1385: val = opt + 14;
1386: if (*val == '\0')
1.186 djm 1387: fatal("Empty force-command option");
1.190 djm 1388: if (certflags_command != NULL)
1.179 djm 1389: fatal("force-command already specified");
1.190 djm 1390: certflags_command = xstrdup(val);
1.179 djm 1391: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1392: val = opt + 15;
1393: if (*val == '\0')
1.186 djm 1394: fatal("Empty source-address option");
1.190 djm 1395: if (certflags_src_addr != NULL)
1.179 djm 1396: fatal("source-address already specified");
1397: if (addr_match_cidr_list(NULL, val) != 0)
1398: fatal("Invalid source-address list");
1.190 djm 1399: certflags_src_addr = xstrdup(val);
1.179 djm 1400: } else
1.186 djm 1401: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 1402: }
1403:
1.63 itojun 1404: static void
1.192 ! djm 1405: show_options(const Buffer *optbuf, int v00, int in_critical)
! 1406: {
! 1407: u_char *name, *data;
! 1408: u_int dlen;
! 1409: Buffer options, option;
! 1410:
! 1411: buffer_init(&options);
! 1412: buffer_append(&options, buffer_ptr(optbuf), buffer_len(optbuf));
! 1413:
! 1414: buffer_init(&option);
! 1415: while (buffer_len(&options) != 0) {
! 1416: name = buffer_get_string(&options, NULL);
! 1417: data = buffer_get_string_ptr(&options, &dlen);
! 1418: buffer_append(&option, data, dlen);
! 1419: printf(" %s", name);
! 1420: if ((v00 || !in_critical) &&
! 1421: (strcmp(name, "permit-X11-forwarding") == 0 ||
! 1422: strcmp(name, "permit-agent-forwarding") == 0 ||
! 1423: strcmp(name, "permit-port-forwarding") == 0 ||
! 1424: strcmp(name, "permit-pty") == 0 ||
! 1425: strcmp(name, "permit-user-rc") == 0))
! 1426: printf("\n");
! 1427: else if ((v00 || in_critical) &&
! 1428: (strcmp(name, "force-command") == 0 ||
! 1429: strcmp(name, "source-address") == 0)) {
! 1430: data = buffer_get_string(&option, NULL);
! 1431: printf(" %s\n", data);
! 1432: xfree(data);
! 1433: } else {
! 1434: printf(" UNKNOWN OPTION (len %u)\n",
! 1435: buffer_len(&option));
! 1436: buffer_clear(&option);
! 1437: }
! 1438: xfree(name);
! 1439: if (buffer_len(&option) != 0)
! 1440: fatal("Option corrupt: extra data at end");
! 1441: }
! 1442: buffer_free(&option);
! 1443: buffer_free(&options);
! 1444: }
! 1445:
! 1446: static void
1.182 djm 1447: do_show_cert(struct passwd *pw)
1448: {
1449: Key *key;
1450: struct stat st;
1451: char *key_fp, *ca_fp;
1.192 ! djm 1452: u_int i, v00;
1.182 djm 1453:
1454: if (!have_identity)
1455: ask_filename(pw, "Enter file in which the key is");
1.191 djm 1456: if (stat(identity_file, &st) < 0)
1457: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.182 djm 1458: if ((key = key_load_public(identity_file, NULL)) == NULL)
1459: fatal("%s is not a public key", identity_file);
1460: if (!key_is_cert(key))
1461: fatal("%s is not a certificate", identity_file);
1.186 djm 1462: v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00;
1463:
1.182 djm 1464: key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
1465: ca_fp = key_fingerprint(key->cert->signature_key,
1466: SSH_FP_MD5, SSH_FP_HEX);
1467:
1468: printf("%s:\n", identity_file);
1.186 djm 1469: printf(" Type: %s %s certificate\n", key_ssh_name(key),
1470: key_cert_type(key));
1471: printf(" Public key: %s %s\n", key_type(key), key_fp);
1472: printf(" Signing CA: %s %s\n",
1.182 djm 1473: key_type(key->cert->signature_key), ca_fp);
1.186 djm 1474: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1475: if (!v00)
1476: printf(" Serial: %llu\n", key->cert->serial);
1.182 djm 1477: printf(" Valid: %s\n",
1478: fmt_validity(key->cert->valid_after, key->cert->valid_before));
1479: printf(" Principals: ");
1480: if (key->cert->nprincipals == 0)
1481: printf("(none)\n");
1482: else {
1483: for (i = 0; i < key->cert->nprincipals; i++)
1484: printf("\n %s",
1485: key->cert->principals[i]);
1486: printf("\n");
1487: }
1.186 djm 1488: printf(" Critical Options: ");
1489: if (buffer_len(&key->cert->critical) == 0)
1.182 djm 1490: printf("(none)\n");
1491: else {
1492: printf("\n");
1.192 ! djm 1493: show_options(&key->cert->critical, v00, 1);
1.186 djm 1494: }
1495: if (!v00) {
1496: printf(" Extensions: ");
1497: if (buffer_len(&key->cert->extensions) == 0)
1498: printf("(none)\n");
1499: else {
1500: printf("\n");
1.192 ! djm 1501: show_options(&key->cert->extensions, v00, 0);
1.182 djm 1502: }
1503: }
1504: exit(0);
1505: }
1506:
1507: static void
1.10 markus 1508: usage(void)
1509: {
1.161 sobrado 1510: fprintf(stderr, "usage: %s [options]\n", __progname);
1.77 jakob 1511: fprintf(stderr, "Options:\n");
1.123 otto 1512: fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
1513: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
1.77 jakob 1514: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
1.123 otto 1515: fprintf(stderr, " -C comment Provide new comment.\n");
1.77 jakob 1516: fprintf(stderr, " -c Change comment in private and public key files.\n");
1.177 markus 1517: #ifdef ENABLE_PKCS11
1518: fprintf(stderr, " -D pkcs11 Download public key from pkcs11 token.\n");
1519: #endif
1.159 jmc 1520: fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n");
1.123 otto 1521: fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1.77 jakob 1522: fprintf(stderr, " -f filename Filename of the key file.\n");
1.123 otto 1523: fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1.105 jakob 1524: fprintf(stderr, " -g Use generic DNS resource record format.\n");
1.123 otto 1525: fprintf(stderr, " -H Hash names in known_hosts file.\n");
1.179 djm 1526: fprintf(stderr, " -h Generate host certificate instead of a user certificate.\n");
1527: fprintf(stderr, " -I key_id Key identifier to include in certificate.\n");
1.159 jmc 1528: fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n");
1.182 djm 1529: fprintf(stderr, " -L Print the contents of a certificate.\n");
1.77 jakob 1530: fprintf(stderr, " -l Show fingerprint of key file.\n");
1.123 otto 1531: fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1.179 djm 1532: fprintf(stderr, " -n name,... User/host principal names to include in certificate\n");
1.123 otto 1533: fprintf(stderr, " -N phrase Provide new passphrase.\n");
1.187 jmc 1534: fprintf(stderr, " -O option Specify a certificate option.\n");
1.123 otto 1535: fprintf(stderr, " -P phrase Provide old passphrase.\n");
1.77 jakob 1536: fprintf(stderr, " -p Change passphrase of private key file.\n");
1537: fprintf(stderr, " -q Quiet.\n");
1.123 otto 1538: fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1539: fprintf(stderr, " -r hostname Print DNS resource record.\n");
1.179 djm 1540: fprintf(stderr, " -s ca_key Certify keys with CA key.\n");
1.123 otto 1541: fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
1542: fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
1.77 jakob 1543: fprintf(stderr, " -t type Specify type of key to create.\n");
1.179 djm 1544: fprintf(stderr, " -V from:to Specify certificate validity interval.\n");
1.123 otto 1545: fprintf(stderr, " -v Verbose.\n");
1546: fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
1547: fprintf(stderr, " -y Read private key file and print public key.\n");
1.187 jmc 1548: fprintf(stderr, " -z serial Specify a serial number.\n");
1.107 djm 1549:
1.12 markus 1550: exit(1);
1.10 markus 1551: }
1552:
1.13 deraadt 1553: /*
1554: * Main program for key management.
1555: */
1.2 provos 1556: int
1.156 deraadt 1557: main(int argc, char **argv)
1.1 deraadt 1558: {
1.87 djm 1559: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.177 markus 1560: char out_file[MAXPATHLEN], *pkcs11provider = NULL;
1.119 djm 1561: char *rr_hostname = NULL;
1.46 deraadt 1562: Key *private, *public;
1.12 markus 1563: struct passwd *pw;
1564: struct stat st;
1.177 markus 1565: int opt, type, fd;
1.189 djm 1566: u_int maxbits;
1.126 dtucker 1567: u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1.107 djm 1568: int do_gen_candidates = 0, do_screen_candidates = 0;
1569: BIGNUM *start = NULL;
1.12 markus 1570: FILE *f;
1.125 avsm 1571: const char *errstr;
1.33 markus 1572:
1.12 markus 1573: extern int optind;
1574: extern char *optarg;
1.129 djm 1575:
1576: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1577: sanitise_stdfd();
1.12 markus 1578:
1.26 markus 1579: SSLeay_add_all_algorithms();
1.156 deraadt 1580: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.19 markus 1581:
1.14 markus 1582: /* we need this for the home * directory. */
1.12 markus 1583: pw = getpwuid(getuid());
1584: if (!pw) {
1585: printf("You don't exist, go away!\n");
1586: exit(1);
1587: }
1.19 markus 1588: if (gethostname(hostname, sizeof(hostname)) < 0) {
1589: perror("gethostname");
1590: exit(1);
1591: }
1.14 markus 1592:
1.182 djm 1593: while ((opt = getopt(argc, argv, "degiqpclBHLhvxXyF:b:f:t:D:I:P:N:n:"
1.186 djm 1594: "O:C:r:g:R:T:G:M:S:s:a:V:W:z:")) != -1) {
1.12 markus 1595: switch (opt) {
1596: case 'b':
1.142 deraadt 1597: bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr);
1.125 avsm 1598: if (errstr)
1599: fatal("Bits has bad value %s (%s)",
1600: optarg, errstr);
1.12 markus 1601: break;
1.119 djm 1602: case 'F':
1603: find_host = 1;
1604: rr_hostname = optarg;
1605: break;
1606: case 'H':
1607: hash_hosts = 1;
1608: break;
1.179 djm 1609: case 'I':
1610: cert_key_id = optarg;
1611: break;
1.119 djm 1612: case 'R':
1613: delete_host = 1;
1614: rr_hostname = optarg;
1615: break;
1.182 djm 1616: case 'L':
1617: show_cert = 1;
1618: break;
1.12 markus 1619: case 'l':
1620: print_fingerprint = 1;
1621: break;
1.49 markus 1622: case 'B':
1623: print_bubblebabble = 1;
1624: break;
1.179 djm 1625: case 'n':
1626: cert_principals = optarg;
1627: break;
1.12 markus 1628: case 'p':
1629: change_passphrase = 1;
1630: break;
1631: case 'c':
1632: change_comment = 1;
1633: break;
1634: case 'f':
1.124 avsm 1635: if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1636: sizeof(identity_file))
1637: fatal("Identity filename too long");
1.12 markus 1638: have_identity = 1;
1639: break;
1.105 jakob 1640: case 'g':
1641: print_generic = 1;
1642: break;
1.12 markus 1643: case 'P':
1644: identity_passphrase = optarg;
1645: break;
1646: case 'N':
1647: identity_new_passphrase = optarg;
1648: break;
1.179 djm 1649: case 'O':
1.186 djm 1650: add_cert_option(optarg);
1.179 djm 1651: break;
1.12 markus 1652: case 'C':
1653: identity_comment = optarg;
1654: break;
1655: case 'q':
1656: quiet = 1;
1.20 deraadt 1657: break;
1.57 markus 1658: case 'e':
1.19 markus 1659: case 'x':
1.57 markus 1660: /* export key */
1.19 markus 1661: convert_to_ssh2 = 1;
1662: break;
1.179 djm 1663: case 'h':
1664: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 1665: certflags_flags = 0;
1.179 djm 1666: break;
1.57 markus 1667: case 'i':
1.19 markus 1668: case 'X':
1.57 markus 1669: /* import key */
1.19 markus 1670: convert_from_ssh2 = 1;
1671: break;
1672: case 'y':
1673: print_public = 1;
1.47 jakob 1674: break;
1.19 markus 1675: case 'd':
1.33 markus 1676: key_type_name = "dsa";
1.19 markus 1677: break;
1.179 djm 1678: case 's':
1679: ca_key_path = optarg;
1680: break;
1.33 markus 1681: case 't':
1682: key_type_name = optarg;
1683: break;
1.75 markus 1684: case 'D':
1.177 markus 1685: pkcs11provider = optarg;
1.66 markus 1686: break;
1.113 djm 1687: case 'v':
1688: if (log_level == SYSLOG_LEVEL_INFO)
1689: log_level = SYSLOG_LEVEL_DEBUG1;
1690: else {
1.117 deraadt 1691: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 1692: log_level < SYSLOG_LEVEL_DEBUG3)
1693: log_level++;
1694: }
1695: break;
1.105 jakob 1696: case 'r':
1.119 djm 1697: rr_hostname = optarg;
1.105 jakob 1698: break;
1.107 djm 1699: case 'W':
1.142 deraadt 1700: generator_wanted = (u_int32_t)strtonum(optarg, 1,
1701: UINT_MAX, &errstr);
1.124 avsm 1702: if (errstr)
1703: fatal("Desired generator has bad value: %s (%s)",
1704: optarg, errstr);
1.107 djm 1705: break;
1706: case 'a':
1.142 deraadt 1707: trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1.124 avsm 1708: if (errstr)
1709: fatal("Invalid number of trials: %s (%s)",
1710: optarg, errstr);
1.107 djm 1711: break;
1712: case 'M':
1.142 deraadt 1713: memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1.186 djm 1714: if (errstr)
1.124 avsm 1715: fatal("Memory limit is %s: %s", errstr, optarg);
1.107 djm 1716: break;
1717: case 'G':
1718: do_gen_candidates = 1;
1.124 avsm 1719: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1720: sizeof(out_file))
1721: fatal("Output filename too long");
1.107 djm 1722: break;
1723: case 'T':
1724: do_screen_candidates = 1;
1.124 avsm 1725: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1726: sizeof(out_file))
1727: fatal("Output filename too long");
1.107 djm 1728: break;
1729: case 'S':
1730: /* XXX - also compare length against bits */
1731: if (BN_hex2bn(&start, optarg) == 0)
1732: fatal("Invalid start point.");
1733: break;
1.179 djm 1734: case 'V':
1735: parse_cert_times(optarg);
1.186 djm 1736: break;
1737: case 'z':
1738: cert_serial = strtonum(optarg, 0, LLONG_MAX, &errstr);
1739: if (errstr)
1740: fatal("Invalid serial number: %s", errstr);
1.179 djm 1741: break;
1.12 markus 1742: case '?':
1743: default:
1744: usage();
1745: }
1746: }
1.113 djm 1747:
1748: /* reinit */
1.156 deraadt 1749: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 1750:
1.179 djm 1751: argv += optind;
1752: argc -= optind;
1753:
1754: if (ca_key_path != NULL) {
1755: if (argc < 1) {
1756: printf("Too few arguments.\n");
1757: usage();
1758: }
1759: } else if (argc > 0) {
1.12 markus 1760: printf("Too many arguments.\n");
1.87 djm 1761: usage();
1762: }
1.12 markus 1763: if (change_passphrase && change_comment) {
1764: printf("Can only have one of -p and -c.\n");
1.166 djm 1765: usage();
1766: }
1767: if (print_fingerprint && (delete_host || hash_hosts)) {
1768: printf("Cannot use -l with -D or -R.\n");
1.12 markus 1769: usage();
1.179 djm 1770: }
1771: if (ca_key_path != NULL) {
1772: if (cert_key_id == NULL)
1773: fatal("Must specify key id (-I) when certifying");
1774: do_ca_sign(pw, argc, argv);
1.12 markus 1775: }
1.182 djm 1776: if (show_cert)
1777: do_show_cert(pw);
1.119 djm 1778: if (delete_host || hash_hosts || find_host)
1779: do_known_hosts(pw, rr_hostname);
1.49 markus 1780: if (print_fingerprint || print_bubblebabble)
1.12 markus 1781: do_fingerprint(pw);
1782: if (change_passphrase)
1783: do_change_passphrase(pw);
1784: if (change_comment)
1785: do_change_comment(pw);
1.19 markus 1786: if (convert_to_ssh2)
1787: do_convert_to_ssh2(pw);
1788: if (convert_from_ssh2)
1789: do_convert_from_ssh2(pw);
1790: if (print_public)
1791: do_print_public(pw);
1.119 djm 1792: if (rr_hostname != NULL) {
1.138 jakob 1793: unsigned int n = 0;
1794:
1795: if (have_identity) {
1796: n = do_print_resource_record(pw,
1797: identity_file, rr_hostname);
1798: if (n == 0) {
1799: perror(identity_file);
1800: exit(1);
1801: }
1802: exit(0);
1803: } else {
1804:
1805: n += do_print_resource_record(pw,
1806: _PATH_HOST_RSA_KEY_FILE, rr_hostname);
1807: n += do_print_resource_record(pw,
1808: _PATH_HOST_DSA_KEY_FILE, rr_hostname);
1809:
1810: if (n == 0)
1811: fatal("no keys found.");
1812: exit(0);
1813: }
1.105 jakob 1814: }
1.177 markus 1815: if (pkcs11provider != NULL)
1816: do_download(pw, pkcs11provider);
1.107 djm 1817:
1818: if (do_gen_candidates) {
1819: FILE *out = fopen(out_file, "w");
1.111 djm 1820:
1.107 djm 1821: if (out == NULL) {
1822: error("Couldn't open modulus candidate file \"%s\": %s",
1823: out_file, strerror(errno));
1824: return (1);
1825: }
1.130 markus 1826: if (bits == 0)
1827: bits = DEFAULT_BITS;
1.107 djm 1828: if (gen_candidates(out, memory, bits, start) != 0)
1.131 stevesk 1829: fatal("modulus candidate generation failed");
1.107 djm 1830:
1831: return (0);
1832: }
1833:
1834: if (do_screen_candidates) {
1835: FILE *in;
1836: FILE *out = fopen(out_file, "w");
1837:
1838: if (have_identity && strcmp(identity_file, "-") != 0) {
1839: if ((in = fopen(identity_file, "r")) == NULL) {
1840: fatal("Couldn't open modulus candidate "
1.111 djm 1841: "file \"%s\": %s", identity_file,
1.107 djm 1842: strerror(errno));
1843: }
1844: } else
1845: in = stdin;
1846:
1847: if (out == NULL) {
1848: fatal("Couldn't open moduli file \"%s\": %s",
1849: out_file, strerror(errno));
1850: }
1851: if (prime_test(in, out, trials, generator_wanted) != 0)
1.131 stevesk 1852: fatal("modulus screening failed");
1.108 markus 1853: return (0);
1.75 markus 1854: }
1.12 markus 1855:
1856: arc4random_stir();
1857:
1.133 djm 1858: if (key_type_name == NULL)
1859: key_type_name = "rsa";
1860:
1.35 markus 1861: type = key_type_from_name(key_type_name);
1862: if (type == KEY_UNSPEC) {
1863: fprintf(stderr, "unknown key type %s\n", key_type_name);
1864: exit(1);
1.19 markus 1865: }
1.135 dtucker 1866: if (bits == 0)
1867: bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
1.189 djm 1868: maxbits = (type == KEY_DSA) ?
1869: OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS;
1870: if (bits > maxbits) {
1871: fprintf(stderr, "key bits exceeds maximum %d\n", maxbits);
1872: exit(1);
1873: }
1.134 dtucker 1874: if (type == KEY_DSA && bits != 1024)
1875: fatal("DSA keys must be 1024 bits");
1.33 markus 1876: if (!quiet)
1.35 markus 1877: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 1878: private = key_generate(type, bits);
1879: if (private == NULL) {
1.173 tobias 1880: fprintf(stderr, "key_generate failed\n");
1.33 markus 1881: exit(1);
1882: }
1883: public = key_from_private(private);
1.12 markus 1884:
1885: if (!have_identity)
1886: ask_filename(pw, "Enter file in which to save the key");
1887:
1.132 djm 1888: /* Create ~/.ssh directory if it doesn't already exist. */
1.188 djm 1889: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
1890: pw->pw_dir, _PATH_SSH_USER_DIR);
1891: if (strstr(identity_file, dotsshdir) != NULL) {
1892: if (stat(dotsshdir, &st) < 0) {
1893: if (errno != ENOENT) {
1894: error("Could not stat %s: %s", dotsshdir,
1895: strerror(errno));
1896: } else if (mkdir(dotsshdir, 0700) < 0) {
1897: error("Could not create directory '%s': %s",
1898: dotsshdir, strerror(errno));
1899: } else if (!quiet)
1900: printf("Created directory '%s'.\n", dotsshdir);
1901: }
1.12 markus 1902: }
1903: /* If the file already exists, ask the user to confirm. */
1904: if (stat(identity_file, &st) >= 0) {
1905: char yesno[3];
1906: printf("%s already exists.\n", identity_file);
1907: printf("Overwrite (y/n)? ");
1908: fflush(stdout);
1909: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1910: exit(1);
1911: if (yesno[0] != 'y' && yesno[0] != 'Y')
1912: exit(1);
1913: }
1914: /* Ask for a passphrase (twice). */
1915: if (identity_passphrase)
1916: passphrase1 = xstrdup(identity_passphrase);
1917: else if (identity_new_passphrase)
1918: passphrase1 = xstrdup(identity_new_passphrase);
1919: else {
1920: passphrase_again:
1921: passphrase1 =
1.65 markus 1922: read_passphrase("Enter passphrase (empty for no "
1923: "passphrase): ", RP_ALLOW_STDIN);
1924: passphrase2 = read_passphrase("Enter same passphrase again: ",
1925: RP_ALLOW_STDIN);
1.12 markus 1926: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 1927: /*
1928: * The passphrases do not match. Clear them and
1929: * retry.
1930: */
1.12 markus 1931: memset(passphrase1, 0, strlen(passphrase1));
1932: memset(passphrase2, 0, strlen(passphrase2));
1933: xfree(passphrase1);
1934: xfree(passphrase2);
1935: printf("Passphrases do not match. Try again.\n");
1936: goto passphrase_again;
1937: }
1938: /* Clear the other copy of the passphrase. */
1939: memset(passphrase2, 0, strlen(passphrase2));
1940: xfree(passphrase2);
1941: }
1942:
1943: if (identity_comment) {
1944: strlcpy(comment, identity_comment, sizeof(comment));
1945: } else {
1.172 stevesk 1946: /* Create default comment field for the passphrase. */
1.12 markus 1947: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1948: }
1949:
1950: /* Save the key with the given passphrase and comment. */
1.52 markus 1951: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 1952: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1953: memset(passphrase1, 0, strlen(passphrase1));
1954: xfree(passphrase1);
1955: exit(1);
1956: }
1957: /* Clear the passphrase. */
1958: memset(passphrase1, 0, strlen(passphrase1));
1959: xfree(passphrase1);
1960:
1961: /* Clear the private key and the random number generator. */
1.33 markus 1962: key_free(private);
1.12 markus 1963: arc4random_stir();
1964:
1965: if (!quiet)
1966: printf("Your identification has been saved in %s.\n", identity_file);
1967:
1968: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1969: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1970: if (fd == -1) {
1.12 markus 1971: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 1972: exit(1);
1973: }
1974: f = fdopen(fd, "w");
1975: if (f == NULL) {
1.173 tobias 1976: printf("fdopen %s failed\n", identity_file);
1.12 markus 1977: exit(1);
1978: }
1.19 markus 1979: if (!key_write(public, f))
1.173 tobias 1980: fprintf(stderr, "write key failed\n");
1.19 markus 1981: fprintf(f, " %s\n", comment);
1.12 markus 1982: fclose(f);
1983:
1984: if (!quiet) {
1.50 markus 1985: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.167 grunk 1986: char *ra = key_fingerprint(public, SSH_FP_MD5,
1987: SSH_FP_RANDOMART);
1.19 markus 1988: printf("Your public key has been saved in %s.\n",
1989: identity_file);
1.12 markus 1990: printf("The key fingerprint is:\n");
1.50 markus 1991: printf("%s %s\n", fp, comment);
1.167 grunk 1992: printf("The key's randomart image is:\n");
1993: printf("%s\n", ra);
1994: xfree(ra);
1.50 markus 1995: xfree(fp);
1.12 markus 1996: }
1.19 markus 1997:
1998: key_free(public);
1.12 markus 1999: exit(0);
1.1 deraadt 2000: }
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