Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.122.2.2
1.1 deraadt 1: /*
1.13 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Identity and host key generation and maintenance.
1.31 deraadt 6: *
7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
1.13 deraadt 12: */
1.1 deraadt 13:
14: #include "includes.h"
1.122.2.2! brad 15: RCSID("$OpenBSD: ssh-keygen.c,v 1.135 2005/11/29 02:04:55 dtucker Exp $");
1.19 markus 16:
17: #include <openssl/evp.h>
18: #include <openssl/pem.h>
1.1 deraadt 19:
20: #include "xmalloc.h"
1.19 markus 21: #include "key.h"
1.53 markus 22: #include "rsa.h"
1.19 markus 23: #include "authfile.h"
24: #include "uuencode.h"
1.32 markus 25: #include "buffer.h"
26: #include "bufaux.h"
1.40 markus 27: #include "pathnames.h"
1.41 markus 28: #include "log.h"
1.114 djm 29: #include "misc.h"
1.119 djm 30: #include "match.h"
31: #include "hostfile.h"
1.32 markus 32:
1.75 markus 33: #ifdef SMARTCARD
34: #include "scard.h"
1.106 djm 35: #endif
36: #include "dns.h"
1.66 markus 37:
1.122.2.2! brad 38: /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
! 39: #define DEFAULT_BITS 2048
! 40: #define DEFAULT_BITS_DSA 1024
! 41: u_int32_t bits = 0;
1.1 deraadt 42:
1.14 markus 43: /*
44: * Flag indicating that we just want to change the passphrase. This can be
45: * set on the command line.
46: */
1.1 deraadt 47: int change_passphrase = 0;
48:
1.14 markus 49: /*
50: * Flag indicating that we just want to change the comment. This can be set
51: * on the command line.
52: */
1.1 deraadt 53: int change_comment = 0;
54:
1.2 provos 55: int quiet = 0;
56:
1.119 djm 57: /* Flag indicating that we want to hash a known_hosts file */
58: int hash_hosts = 0;
59: /* Flag indicating that we want lookup a host in known_hosts file */
60: int find_host = 0;
61: /* Flag indicating that we want to delete a host from a known_hosts file */
62: int delete_host = 0;
63:
1.8 markus 64: /* Flag indicating that we just want to see the key fingerprint */
65: int print_fingerprint = 0;
1.49 markus 66: int print_bubblebabble = 0;
1.8 markus 67:
1.10 markus 68: /* The identity file name, given on the command line or entered by the user. */
69: char identity_file[1024];
70: int have_identity = 0;
1.1 deraadt 71:
72: /* This is set to the passphrase if given on the command line. */
73: char *identity_passphrase = NULL;
74:
75: /* This is set to the new passphrase if given on the command line. */
76: char *identity_new_passphrase = NULL;
77:
78: /* This is set to the new comment if given on the command line. */
79: char *identity_comment = NULL;
80:
1.19 markus 81: /* Dump public key file in format used by real and the original SSH 2 */
82: int convert_to_ssh2 = 0;
83: int convert_from_ssh2 = 0;
84: int print_public = 0;
1.105 jakob 85: int print_generic = 0;
1.33 markus 86:
1.87 djm 87: char *key_type_name = NULL;
1.19 markus 88:
1.10 markus 89: /* argv0 */
90: extern char *__progname;
1.1 deraadt 91:
1.19 markus 92: char hostname[MAXHOSTNAMELEN];
93:
1.115 djm 94: /* moduli.c */
1.122.2.1 brad 95: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.115 djm 96: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
97:
1.63 itojun 98: static void
1.10 markus 99: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 100: {
1.12 markus 101: char buf[1024];
1.35 markus 102: char *name = NULL;
103:
1.92 stevesk 104: if (key_type_name == NULL)
1.40 markus 105: name = _PATH_SSH_CLIENT_ID_RSA;
1.92 stevesk 106: else
107: switch (key_type_from_name(key_type_name)) {
108: case KEY_RSA1:
109: name = _PATH_SSH_CLIENT_IDENTITY;
110: break;
111: case KEY_DSA:
112: name = _PATH_SSH_CLIENT_ID_DSA;
113: break;
114: case KEY_RSA:
115: name = _PATH_SSH_CLIENT_ID_RSA;
116: break;
117: default:
118: fprintf(stderr, "bad key type");
119: exit(1);
120: break;
121: }
122:
1.35 markus 123: snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
1.37 markus 124: fprintf(stderr, "%s (%s): ", prompt, identity_file);
1.12 markus 125: if (fgets(buf, sizeof(buf), stdin) == NULL)
126: exit(1);
127: if (strchr(buf, '\n'))
128: *strchr(buf, '\n') = 0;
129: if (strcmp(buf, "") != 0)
130: strlcpy(identity_file, buf, sizeof(identity_file));
131: have_identity = 1;
1.7 markus 132: }
133:
1.63 itojun 134: static Key *
1.61 markus 135: load_identity(char *filename)
1.19 markus 136: {
1.52 markus 137: char *pass;
138: Key *prv;
139:
1.55 markus 140: prv = key_load_private(filename, "", NULL);
1.52 markus 141: if (prv == NULL) {
1.61 markus 142: if (identity_passphrase)
143: pass = xstrdup(identity_passphrase);
144: else
1.65 markus 145: pass = read_passphrase("Enter passphrase: ",
146: RP_ALLOW_STDIN);
1.52 markus 147: prv = key_load_private(filename, pass, NULL);
1.19 markus 148: memset(pass, 0, strlen(pass));
149: xfree(pass);
150: }
1.52 markus 151: return prv;
1.19 markus 152: }
153:
1.32 markus 154: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 155: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 156: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 157: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 158:
1.63 itojun 159: static void
1.19 markus 160: do_convert_to_ssh2(struct passwd *pw)
161: {
1.59 markus 162: Key *k;
1.94 markus 163: u_int len;
1.36 markus 164: u_char *blob;
1.19 markus 165: struct stat st;
166:
167: if (!have_identity)
168: ask_filename(pw, "Enter file in which the key is");
169: if (stat(identity_file, &st) < 0) {
170: perror(identity_file);
171: exit(1);
172: }
1.59 markus 173: if ((k = key_load_public(identity_file, NULL)) == NULL) {
1.61 markus 174: if ((k = load_identity(identity_file)) == NULL) {
1.59 markus 175: fprintf(stderr, "load failed\n");
176: exit(1);
177: }
1.104 markus 178: }
179: if (k->type == KEY_RSA1) {
180: fprintf(stderr, "version 1 keys are not supported\n");
181: exit(1);
1.19 markus 182: }
1.81 markus 183: if (key_to_blob(k, &blob, &len) <= 0) {
184: fprintf(stderr, "key_to_blob failed\n");
185: exit(1);
186: }
1.32 markus 187: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.19 markus 188: fprintf(stdout,
1.101 deraadt 189: "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
1.59 markus 190: key_size(k), key_type(k),
1.19 markus 191: pw->pw_name, hostname);
192: dump_base64(stdout, blob, len);
1.32 markus 193: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.59 markus 194: key_free(k);
1.21 markus 195: xfree(blob);
1.19 markus 196: exit(0);
197: }
198:
1.63 itojun 199: static void
1.32 markus 200: buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
201: {
1.116 avsm 202: u_int bignum_bits = buffer_get_int(b);
203: u_int bytes = (bignum_bits + 7) / 8;
1.53 markus 204:
1.32 markus 205: if (buffer_len(b) < bytes)
1.53 markus 206: fatal("buffer_get_bignum_bits: input buffer too small: "
207: "need %d have %d", bytes, buffer_len(b));
1.89 stevesk 208: BN_bin2bn(buffer_ptr(b), bytes, value);
1.32 markus 209: buffer_consume(b, bytes);
210: }
211:
1.63 itojun 212: static Key *
1.93 markus 213: do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
1.32 markus 214: {
215: Buffer b;
216: Key *key = NULL;
1.64 markus 217: char *type, *cipher;
1.69 stevesk 218: u_char *sig, data[] = "abcde12345";
1.62 markus 219: int magic, rlen, ktype, i1, i2, i3, i4;
1.64 markus 220: u_int slen;
1.62 markus 221: u_long e;
1.32 markus 222:
223: buffer_init(&b);
224: buffer_append(&b, blob, blen);
225:
226: magic = buffer_get_int(&b);
227: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
228: error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
229: buffer_free(&b);
230: return NULL;
231: }
1.62 markus 232: i1 = buffer_get_int(&b);
1.32 markus 233: type = buffer_get_string(&b, NULL);
234: cipher = buffer_get_string(&b, NULL);
1.62 markus 235: i2 = buffer_get_int(&b);
236: i3 = buffer_get_int(&b);
237: i4 = buffer_get_int(&b);
238: debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
1.32 markus 239: if (strcmp(cipher, "none") != 0) {
240: error("unsupported cipher %s", cipher);
241: xfree(cipher);
242: buffer_free(&b);
1.53 markus 243: xfree(type);
1.32 markus 244: return NULL;
245: }
246: xfree(cipher);
247:
1.53 markus 248: if (strstr(type, "dsa")) {
249: ktype = KEY_DSA;
250: } else if (strstr(type, "rsa")) {
251: ktype = KEY_RSA;
252: } else {
1.118 markus 253: buffer_free(&b);
1.53 markus 254: xfree(type);
1.32 markus 255: return NULL;
256: }
1.53 markus 257: key = key_new_private(ktype);
258: xfree(type);
259:
260: switch (key->type) {
261: case KEY_DSA:
262: buffer_get_bignum_bits(&b, key->dsa->p);
263: buffer_get_bignum_bits(&b, key->dsa->g);
264: buffer_get_bignum_bits(&b, key->dsa->q);
265: buffer_get_bignum_bits(&b, key->dsa->pub_key);
266: buffer_get_bignum_bits(&b, key->dsa->priv_key);
267: break;
268: case KEY_RSA:
1.62 markus 269: e = buffer_get_char(&b);
270: debug("e %lx", e);
271: if (e < 30) {
272: e <<= 8;
273: e += buffer_get_char(&b);
274: debug("e %lx", e);
275: e <<= 8;
276: e += buffer_get_char(&b);
277: debug("e %lx", e);
278: }
279: if (!BN_set_word(key->rsa->e, e)) {
1.53 markus 280: buffer_free(&b);
281: key_free(key);
282: return NULL;
283: }
284: buffer_get_bignum_bits(&b, key->rsa->d);
285: buffer_get_bignum_bits(&b, key->rsa->n);
286: buffer_get_bignum_bits(&b, key->rsa->iqmp);
287: buffer_get_bignum_bits(&b, key->rsa->q);
288: buffer_get_bignum_bits(&b, key->rsa->p);
1.68 markus 289: rsa_generate_additional_parameters(key->rsa);
1.53 markus 290: break;
291: }
1.32 markus 292: rlen = buffer_len(&b);
1.85 deraadt 293: if (rlen != 0)
1.53 markus 294: error("do_convert_private_ssh2_from_blob: "
295: "remaining bytes in key blob %d", rlen);
1.32 markus 296: buffer_free(&b);
1.64 markus 297:
298: /* try the key */
299: key_sign(key, &sig, &slen, data, sizeof(data));
300: key_verify(key, sig, slen, data, sizeof(data));
301: xfree(sig);
1.32 markus 302: return key;
303: }
304:
1.63 itojun 305: static void
1.19 markus 306: do_convert_from_ssh2(struct passwd *pw)
307: {
308: Key *k;
309: int blen;
1.98 markus 310: u_int len;
1.19 markus 311: char line[1024], *p;
1.80 stevesk 312: u_char blob[8096];
1.19 markus 313: char encoded[8096];
314: struct stat st;
1.32 markus 315: int escaped = 0, private = 0, ok;
1.19 markus 316: FILE *fp;
317:
318: if (!have_identity)
319: ask_filename(pw, "Enter file in which the key is");
320: if (stat(identity_file, &st) < 0) {
321: perror(identity_file);
322: exit(1);
323: }
324: fp = fopen(identity_file, "r");
325: if (fp == NULL) {
326: perror(identity_file);
327: exit(1);
328: }
329: encoded[0] = '\0';
330: while (fgets(line, sizeof(line), fp)) {
1.25 markus 331: if (!(p = strchr(line, '\n'))) {
332: fprintf(stderr, "input line too long.\n");
333: exit(1);
334: }
335: if (p > line && p[-1] == '\\')
336: escaped++;
1.19 markus 337: if (strncmp(line, "----", 4) == 0 ||
338: strstr(line, ": ") != NULL) {
1.32 markus 339: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
340: private = 1;
1.64 markus 341: if (strstr(line, " END ") != NULL) {
342: break;
343: }
1.60 markus 344: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 345: continue;
346: }
1.25 markus 347: if (escaped) {
348: escaped--;
1.60 markus 349: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 350: continue;
1.19 markus 351: }
352: *p = '\0';
353: strlcat(encoded, line, sizeof(encoded));
354: }
1.98 markus 355: len = strlen(encoded);
356: if (((len % 4) == 3) &&
357: (encoded[len-1] == '=') &&
358: (encoded[len-2] == '=') &&
359: (encoded[len-3] == '='))
360: encoded[len-3] = '\0';
1.91 stevesk 361: blen = uudecode(encoded, blob, sizeof(blob));
1.19 markus 362: if (blen < 0) {
363: fprintf(stderr, "uudecode failed.\n");
364: exit(1);
365: }
1.32 markus 366: k = private ?
367: do_convert_private_ssh2_from_blob(blob, blen) :
1.33 markus 368: key_from_blob(blob, blen);
1.32 markus 369: if (k == NULL) {
370: fprintf(stderr, "decode blob failed.\n");
371: exit(1);
372: }
373: ok = private ?
1.53 markus 374: (k->type == KEY_DSA ?
375: PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
376: PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
1.32 markus 377: key_write(k, stdout);
378: if (!ok) {
379: fprintf(stderr, "key write failed");
380: exit(1);
381: }
1.19 markus 382: key_free(k);
1.90 markus 383: if (!private)
384: fprintf(stdout, "\n");
1.19 markus 385: fclose(fp);
386: exit(0);
387: }
388:
1.63 itojun 389: static void
1.19 markus 390: do_print_public(struct passwd *pw)
391: {
1.52 markus 392: Key *prv;
1.19 markus 393: struct stat st;
394:
395: if (!have_identity)
396: ask_filename(pw, "Enter file in which the key is");
397: if (stat(identity_file, &st) < 0) {
398: perror(identity_file);
399: exit(1);
400: }
1.61 markus 401: prv = load_identity(identity_file);
1.52 markus 402: if (prv == NULL) {
1.19 markus 403: fprintf(stderr, "load failed\n");
404: exit(1);
405: }
1.52 markus 406: if (!key_write(prv, stdout))
1.19 markus 407: fprintf(stderr, "key_write failed");
1.52 markus 408: key_free(prv);
1.19 markus 409: fprintf(stdout, "\n");
410: exit(0);
411: }
412:
1.74 markus 413: #ifdef SMARTCARD
1.66 markus 414: static void
1.75 markus 415: do_upload(struct passwd *pw, const char *sc_reader_id)
1.66 markus 416: {
417: Key *prv = NULL;
418: struct stat st;
1.95 markus 419: int ret;
1.66 markus 420:
421: if (!have_identity)
422: ask_filename(pw, "Enter file in which the key is");
423: if (stat(identity_file, &st) < 0) {
424: perror(identity_file);
1.95 markus 425: exit(1);
1.66 markus 426: }
427: prv = load_identity(identity_file);
428: if (prv == NULL) {
429: error("load failed");
1.95 markus 430: exit(1);
1.66 markus 431: }
1.95 markus 432: ret = sc_put_key(prv, sc_reader_id);
433: key_free(prv);
434: if (ret < 0)
435: exit(1);
1.103 itojun 436: logit("loading key done");
1.95 markus 437: exit(0);
1.74 markus 438: }
1.75 markus 439:
440: static void
441: do_download(struct passwd *pw, const char *sc_reader_id)
442: {
1.97 markus 443: Key **keys = NULL;
444: int i;
1.75 markus 445:
1.97 markus 446: keys = sc_get_keys(sc_reader_id, NULL);
447: if (keys == NULL)
1.75 markus 448: fatal("cannot read public key from smartcard");
1.97 markus 449: for (i = 0; keys[i]; i++) {
450: key_write(keys[i], stdout);
451: key_free(keys[i]);
452: fprintf(stdout, "\n");
453: }
454: xfree(keys);
1.75 markus 455: exit(0);
456: }
1.78 jakob 457: #endif /* SMARTCARD */
1.66 markus 458:
1.63 itojun 459: static void
1.8 markus 460: do_fingerprint(struct passwd *pw)
461: {
1.15 markus 462: FILE *f;
1.19 markus 463: Key *public;
1.49 markus 464: char *comment = NULL, *cp, *ep, line[16*1024], *fp;
1.84 stevesk 465: int i, skip = 0, num = 1, invalid = 1;
466: enum fp_rep rep;
467: enum fp_type fptype;
1.12 markus 468: struct stat st;
469:
1.52 markus 470: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
471: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 472:
1.12 markus 473: if (!have_identity)
474: ask_filename(pw, "Enter file in which the key is");
475: if (stat(identity_file, &st) < 0) {
476: perror(identity_file);
477: exit(1);
478: }
1.52 markus 479: public = key_load_public(identity_file, &comment);
480: if (public != NULL) {
481: fp = key_fingerprint(public, fptype, rep);
1.101 deraadt 482: printf("%u %s %s\n", key_size(public), fp, comment);
1.33 markus 483: key_free(public);
484: xfree(comment);
1.49 markus 485: xfree(fp);
1.15 markus 486: exit(0);
487: }
1.52 markus 488: if (comment)
489: xfree(comment);
1.15 markus 490:
491: f = fopen(identity_file, "r");
492: if (f != NULL) {
493: while (fgets(line, sizeof(line), f)) {
494: i = strlen(line) - 1;
495: if (line[i] != '\n') {
496: error("line %d too long: %.40s...", num, line);
497: skip = 1;
498: continue;
499: }
500: num++;
501: if (skip) {
502: skip = 0;
503: continue;
504: }
505: line[i] = '\0';
506:
507: /* Skip leading whitespace, empty and comment lines. */
508: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
509: ;
510: if (!*cp || *cp == '\n' || *cp == '#')
511: continue ;
512: i = strtol(cp, &ep, 10);
513: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
514: int quoted = 0;
515: comment = cp;
1.101 deraadt 516: for (; *cp && (quoted || (*cp != ' ' &&
517: *cp != '\t')); cp++) {
1.15 markus 518: if (*cp == '\\' && cp[1] == '"')
519: cp++; /* Skip both */
520: else if (*cp == '"')
521: quoted = !quoted;
522: }
523: if (!*cp)
524: continue;
525: *cp++ = '\0';
526: }
527: ep = cp;
1.38 markus 528: public = key_new(KEY_RSA1);
529: if (key_read(public, &cp) != 1) {
530: cp = ep;
531: key_free(public);
532: public = key_new(KEY_UNSPEC);
533: if (key_read(public, &cp) != 1) {
534: key_free(public);
535: continue;
536: }
1.12 markus 537: }
1.38 markus 538: comment = *cp ? cp : comment;
1.52 markus 539: fp = key_fingerprint(public, fptype, rep);
1.101 deraadt 540: printf("%u %s %s\n", key_size(public), fp,
1.38 markus 541: comment ? comment : "no comment");
1.49 markus 542: xfree(fp);
1.52 markus 543: key_free(public);
1.38 markus 544: invalid = 0;
1.12 markus 545: }
1.15 markus 546: fclose(f);
547: }
548: if (invalid) {
1.83 markus 549: printf("%s is not a public key file.\n", identity_file);
1.15 markus 550: exit(1);
1.12 markus 551: }
552: exit(0);
1.8 markus 553: }
554:
1.119 djm 555: static void
556: print_host(FILE *f, char *name, Key *public, int hash)
557: {
558: if (hash && (name = host_hash(name, NULL, 0)) == NULL)
559: fatal("hash_host failed");
560: fprintf(f, "%s ", name);
561: if (!key_write(public, f))
562: fatal("key_write failed");
563: fprintf(f, "\n");
564: }
565:
566: static void
567: do_known_hosts(struct passwd *pw, const char *name)
568: {
569: FILE *in, *out = stdout;
570: Key *public;
571: char *cp, *cp2, *kp, *kp2;
572: char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
573: int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
574:
575: if (!have_identity) {
576: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
577: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
578: sizeof(identity_file))
579: fatal("Specified known hosts path too long");
580: xfree(cp);
581: have_identity = 1;
582: }
583: if ((in = fopen(identity_file, "r")) == NULL)
584: fatal("fopen: %s", strerror(errno));
585:
586: /*
587: * Find hosts goes to stdout, hash and deletions happen in-place
588: * A corner case is ssh-keygen -HF foo, which should go to stdout
589: */
590: if (!find_host && (hash_hosts || delete_host)) {
591: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
592: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
593: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
594: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
595: fatal("known_hosts path too long");
596: umask(077);
597: if ((c = mkstemp(tmp)) == -1)
598: fatal("mkstemp: %s", strerror(errno));
599: if ((out = fdopen(c, "w")) == NULL) {
600: c = errno;
601: unlink(tmp);
602: fatal("fdopen: %s", strerror(c));
603: }
604: inplace = 1;
605: }
606:
607: while (fgets(line, sizeof(line), in)) {
608: num++;
609: i = strlen(line) - 1;
610: if (line[i] != '\n') {
611: error("line %d too long: %.40s...", num, line);
612: skip = 1;
613: invalid = 1;
614: continue;
615: }
616: if (skip) {
617: skip = 0;
618: continue;
619: }
620: line[i] = '\0';
621:
622: /* Skip leading whitespace, empty and comment lines. */
623: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
624: ;
625: if (!*cp || *cp == '\n' || *cp == '#') {
626: if (inplace)
627: fprintf(out, "%s\n", cp);
628: continue;
629: }
630: /* Find the end of the host name portion. */
631: for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
632: ;
633: if (*kp == '\0' || *(kp + 1) == '\0') {
634: error("line %d missing key: %.40s...",
635: num, line);
636: invalid = 1;
637: continue;
638: }
639: *kp++ = '\0';
640: kp2 = kp;
641:
642: public = key_new(KEY_RSA1);
643: if (key_read(public, &kp) != 1) {
644: kp = kp2;
645: key_free(public);
646: public = key_new(KEY_UNSPEC);
647: if (key_read(public, &kp) != 1) {
648: error("line %d invalid key: %.40s...",
649: num, line);
650: key_free(public);
651: invalid = 1;
652: continue;
653: }
654: }
655:
656: if (*cp == HASH_DELIM) {
657: if (find_host || delete_host) {
658: cp2 = host_hash(name, cp, strlen(cp));
659: if (cp2 == NULL) {
660: error("line %d: invalid hashed "
661: "name: %.64s...", num, line);
662: invalid = 1;
663: continue;
664: }
665: c = (strcmp(cp2, cp) == 0);
666: if (find_host && c) {
667: printf("# Host %s found: "
668: "line %d type %s\n", name,
669: num, key_type(public));
670: print_host(out, cp, public, 0);
671: }
672: if (delete_host && !c)
673: print_host(out, cp, public, 0);
674: } else if (hash_hosts)
675: print_host(out, cp, public, 0);
676: } else {
677: if (find_host || delete_host) {
678: c = (match_hostname(name, cp,
679: strlen(cp)) == 1);
680: if (find_host && c) {
681: printf("# Host %s found: "
682: "line %d type %s\n", name,
683: num, key_type(public));
684: print_host(out, cp, public, hash_hosts);
685: }
686: if (delete_host && !c)
687: print_host(out, cp, public, 0);
688: } else if (hash_hosts) {
1.121 deraadt 689: for (cp2 = strsep(&cp, ",");
1.119 djm 690: cp2 != NULL && *cp2 != '\0';
1.120 djm 691: cp2 = strsep(&cp, ",")) {
692: if (strcspn(cp2, "*?!") != strlen(cp2))
693: fprintf(stderr, "Warning: "
694: "ignoring host name with "
695: "metacharacters: %.64s\n",
696: cp2);
697: else
698: print_host(out, cp2, public, 1);
699: }
1.119 djm 700: has_unhashed = 1;
701: }
702: }
703: key_free(public);
704: }
705: fclose(in);
706:
707: if (invalid) {
708: fprintf(stderr, "%s is not a valid known_host file.\n",
709: identity_file);
710: if (inplace) {
711: fprintf(stderr, "Not replacing existing known_hosts "
1.122 markus 712: "file because of errors\n");
1.119 djm 713: fclose(out);
714: unlink(tmp);
715: }
716: exit(1);
717: }
718:
719: if (inplace) {
720: fclose(out);
721:
722: /* Backup existing file */
723: if (unlink(old) == -1 && errno != ENOENT)
724: fatal("unlink %.100s: %s", old, strerror(errno));
725: if (link(identity_file, old) == -1)
726: fatal("link %.100s to %.100s: %s", identity_file, old,
727: strerror(errno));
728: /* Move new one into place */
729: if (rename(tmp, identity_file) == -1) {
730: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
731: strerror(errno));
732: unlink(tmp);
733: unlink(old);
734: exit(1);
735: }
736:
737: fprintf(stderr, "%s updated.\n", identity_file);
738: fprintf(stderr, "Original contents retained as %s\n", old);
739: if (has_unhashed) {
740: fprintf(stderr, "WARNING: %s contains unhashed "
741: "entries\n", old);
742: fprintf(stderr, "Delete this file to ensure privacy "
1.122.2.1 brad 743: "of hostnames\n");
1.119 djm 744: }
745: }
746:
747: exit(0);
748: }
749:
1.13 deraadt 750: /*
751: * Perform changing a passphrase. The argument is the passwd structure
752: * for the current user.
753: */
1.63 itojun 754: static void
1.7 markus 755: do_change_passphrase(struct passwd *pw)
756: {
1.12 markus 757: char *comment;
758: char *old_passphrase, *passphrase1, *passphrase2;
759: struct stat st;
1.19 markus 760: Key *private;
1.12 markus 761:
762: if (!have_identity)
763: ask_filename(pw, "Enter file in which the key is");
764: if (stat(identity_file, &st) < 0) {
765: perror(identity_file);
766: exit(1);
767: }
768: /* Try to load the file with empty passphrase. */
1.52 markus 769: private = key_load_private(identity_file, "", &comment);
770: if (private == NULL) {
1.12 markus 771: if (identity_passphrase)
772: old_passphrase = xstrdup(identity_passphrase);
773: else
1.65 markus 774: old_passphrase =
775: read_passphrase("Enter old passphrase: ",
776: RP_ALLOW_STDIN);
777: private = key_load_private(identity_file, old_passphrase,
778: &comment);
1.52 markus 779: memset(old_passphrase, 0, strlen(old_passphrase));
780: xfree(old_passphrase);
781: if (private == NULL) {
1.12 markus 782: printf("Bad passphrase.\n");
783: exit(1);
784: }
785: }
786: printf("Key has comment '%s'\n", comment);
787:
788: /* Ask the new passphrase (twice). */
789: if (identity_new_passphrase) {
790: passphrase1 = xstrdup(identity_new_passphrase);
791: passphrase2 = NULL;
792: } else {
793: passphrase1 =
1.65 markus 794: read_passphrase("Enter new passphrase (empty for no "
795: "passphrase): ", RP_ALLOW_STDIN);
796: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 797: RP_ALLOW_STDIN);
1.12 markus 798:
799: /* Verify that they are the same. */
800: if (strcmp(passphrase1, passphrase2) != 0) {
801: memset(passphrase1, 0, strlen(passphrase1));
802: memset(passphrase2, 0, strlen(passphrase2));
803: xfree(passphrase1);
804: xfree(passphrase2);
805: printf("Pass phrases do not match. Try again.\n");
806: exit(1);
807: }
808: /* Destroy the other copy. */
809: memset(passphrase2, 0, strlen(passphrase2));
810: xfree(passphrase2);
811: }
812:
813: /* Save the file using the new passphrase. */
1.52 markus 814: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 815: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 816: memset(passphrase1, 0, strlen(passphrase1));
817: xfree(passphrase1);
1.19 markus 818: key_free(private);
1.12 markus 819: xfree(comment);
820: exit(1);
821: }
822: /* Destroy the passphrase and the copy of the key in memory. */
823: memset(passphrase1, 0, strlen(passphrase1));
824: xfree(passphrase1);
1.19 markus 825: key_free(private); /* Destroys contents */
1.12 markus 826: xfree(comment);
1.1 deraadt 827:
1.12 markus 828: printf("Your identification has been saved with the new passphrase.\n");
829: exit(0);
1.1 deraadt 830: }
831:
1.105 jakob 832: /*
833: * Print the SSHFP RR.
834: */
835: static void
1.116 avsm 836: do_print_resource_record(struct passwd *pw, char *hname)
1.105 jakob 837: {
838: Key *public;
839: char *comment = NULL;
840: struct stat st;
841:
842: if (!have_identity)
843: ask_filename(pw, "Enter file in which the key is");
844: if (stat(identity_file, &st) < 0) {
845: perror(identity_file);
846: exit(1);
847: }
848: public = key_load_public(identity_file, &comment);
849: if (public != NULL) {
1.116 avsm 850: export_dns_rr(hname, public, stdout, print_generic);
1.105 jakob 851: key_free(public);
852: xfree(comment);
853: exit(0);
854: }
855: if (comment)
856: xfree(comment);
857:
858: printf("failed to read v2 public key from %s.\n", identity_file);
859: exit(1);
860: }
861:
1.13 deraadt 862: /*
863: * Change the comment of a private key file.
864: */
1.63 itojun 865: static void
1.2 provos 866: do_change_comment(struct passwd *pw)
1.1 deraadt 867: {
1.46 deraadt 868: char new_comment[1024], *comment, *passphrase;
1.52 markus 869: Key *private;
870: Key *public;
1.12 markus 871: struct stat st;
872: FILE *f;
1.46 deraadt 873: int fd;
1.12 markus 874:
875: if (!have_identity)
876: ask_filename(pw, "Enter file in which the key is");
877: if (stat(identity_file, &st) < 0) {
878: perror(identity_file);
879: exit(1);
880: }
1.52 markus 881: private = key_load_private(identity_file, "", &comment);
882: if (private == NULL) {
1.12 markus 883: if (identity_passphrase)
884: passphrase = xstrdup(identity_passphrase);
885: else if (identity_new_passphrase)
886: passphrase = xstrdup(identity_new_passphrase);
887: else
1.65 markus 888: passphrase = read_passphrase("Enter passphrase: ",
889: RP_ALLOW_STDIN);
1.12 markus 890: /* Try to load using the passphrase. */
1.52 markus 891: private = key_load_private(identity_file, passphrase, &comment);
892: if (private == NULL) {
1.12 markus 893: memset(passphrase, 0, strlen(passphrase));
894: xfree(passphrase);
895: printf("Bad passphrase.\n");
896: exit(1);
897: }
1.52 markus 898: } else {
899: passphrase = xstrdup("");
1.12 markus 900: }
1.52 markus 901: if (private->type != KEY_RSA1) {
902: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
903: key_free(private);
904: exit(1);
1.86 deraadt 905: }
1.12 markus 906: printf("Key now has comment '%s'\n", comment);
907:
908: if (identity_comment) {
909: strlcpy(new_comment, identity_comment, sizeof(new_comment));
910: } else {
911: printf("Enter new comment: ");
912: fflush(stdout);
913: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
914: memset(passphrase, 0, strlen(passphrase));
1.19 markus 915: key_free(private);
1.12 markus 916: exit(1);
917: }
918: if (strchr(new_comment, '\n'))
919: *strchr(new_comment, '\n') = 0;
920: }
921:
922: /* Save the file using the new passphrase. */
1.52 markus 923: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 924: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 925: memset(passphrase, 0, strlen(passphrase));
926: xfree(passphrase);
1.19 markus 927: key_free(private);
1.12 markus 928: xfree(comment);
929: exit(1);
930: }
931: memset(passphrase, 0, strlen(passphrase));
932: xfree(passphrase);
1.52 markus 933: public = key_from_private(private);
1.19 markus 934: key_free(private);
1.12 markus 935:
936: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 937: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
938: if (fd == -1) {
1.12 markus 939: printf("Could not save your public key in %s\n", identity_file);
940: exit(1);
941: }
1.46 deraadt 942: f = fdopen(fd, "w");
943: if (f == NULL) {
944: printf("fdopen %s failed", identity_file);
945: exit(1);
946: }
1.19 markus 947: if (!key_write(public, f))
948: fprintf(stderr, "write key failed");
949: key_free(public);
950: fprintf(f, " %s\n", new_comment);
1.12 markus 951: fclose(f);
1.1 deraadt 952:
1.12 markus 953: xfree(comment);
1.1 deraadt 954:
1.12 markus 955: printf("The comment in your key file has been changed.\n");
956: exit(0);
1.1 deraadt 957: }
958:
1.63 itojun 959: static void
1.10 markus 960: usage(void)
961: {
1.77 jakob 962: fprintf(stderr, "Usage: %s [options]\n", __progname);
963: fprintf(stderr, "Options:\n");
1.122.2.1 brad 964: fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
965: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
1.77 jakob 966: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
1.122.2.1 brad 967: fprintf(stderr, " -C comment Provide new comment.\n");
1.77 jakob 968: fprintf(stderr, " -c Change comment in private and public key files.\n");
1.122.2.1 brad 969: #ifdef SMARTCARD
970: fprintf(stderr, " -D reader Download public key from smartcard.\n");
971: #endif /* SMARTCARD */
1.77 jakob 972: fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
1.122.2.1 brad 973: fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1.77 jakob 974: fprintf(stderr, " -f filename Filename of the key file.\n");
1.122.2.1 brad 975: fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1.105 jakob 976: fprintf(stderr, " -g Use generic DNS resource record format.\n");
1.122.2.1 brad 977: fprintf(stderr, " -H Hash names in known_hosts file.\n");
1.77 jakob 978: fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
979: fprintf(stderr, " -l Show fingerprint of key file.\n");
1.122.2.1 brad 980: fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1.77 jakob 981: fprintf(stderr, " -N phrase Provide new passphrase.\n");
982: fprintf(stderr, " -P phrase Provide old passphrase.\n");
1.122.2.1 brad 983: fprintf(stderr, " -p Change passphrase of private key file.\n");
984: fprintf(stderr, " -q Quiet.\n");
985: fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1.105 jakob 986: fprintf(stderr, " -r hostname Print DNS resource record.\n");
1.122.2.1 brad 987: fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
988: fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
989: fprintf(stderr, " -t type Specify type of key to create.\n");
1.77 jakob 990: #ifdef SMARTCARD
991: fprintf(stderr, " -U reader Upload private key to smartcard.\n");
992: #endif /* SMARTCARD */
1.122.2.1 brad 993: fprintf(stderr, " -v Verbose.\n");
994: fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
995: fprintf(stderr, " -y Read private key file and print public key.\n");
1.107 djm 996:
1.12 markus 997: exit(1);
1.10 markus 998: }
999:
1.13 deraadt 1000: /*
1001: * Main program for key management.
1002: */
1.2 provos 1003: int
1004: main(int ac, char **av)
1.1 deraadt 1005: {
1.87 djm 1006: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.112 djm 1007: char out_file[MAXPATHLEN], *reader_id = NULL;
1.119 djm 1008: char *rr_hostname = NULL;
1.46 deraadt 1009: Key *private, *public;
1.12 markus 1010: struct passwd *pw;
1011: struct stat st;
1.122.2.1 brad 1012: int opt, type, fd, download = 0;
1013: u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1.107 djm 1014: int do_gen_candidates = 0, do_screen_candidates = 0;
1.113 djm 1015: int log_level = SYSLOG_LEVEL_INFO;
1.107 djm 1016: BIGNUM *start = NULL;
1.12 markus 1017: FILE *f;
1.122.2.1 brad 1018: const char *errstr;
1.33 markus 1019:
1.12 markus 1020: extern int optind;
1021: extern char *optarg;
1022:
1.122.2.2! brad 1023: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
! 1024: sanitise_stdfd();
! 1025:
1.26 markus 1026: SSLeay_add_all_algorithms();
1.107 djm 1027: log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.19 markus 1028:
1.14 markus 1029: /* we need this for the home * directory. */
1.12 markus 1030: pw = getpwuid(getuid());
1031: if (!pw) {
1032: printf("You don't exist, go away!\n");
1033: exit(1);
1034: }
1.19 markus 1035: if (gethostname(hostname, sizeof(hostname)) < 0) {
1036: perror("gethostname");
1037: exit(1);
1038: }
1.14 markus 1039:
1.107 djm 1040: while ((opt = getopt(ac, av,
1.119 djm 1041: "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
1.12 markus 1042: switch (opt) {
1043: case 'b':
1.122.2.2! brad 1044: bits = strtonum(optarg, 768, 32768, &errstr);
1.122.2.1 brad 1045: if (errstr)
1046: fatal("Bits has bad value %s (%s)",
1047: optarg, errstr);
1.12 markus 1048: break;
1.119 djm 1049: case 'F':
1050: find_host = 1;
1051: rr_hostname = optarg;
1052: break;
1053: case 'H':
1054: hash_hosts = 1;
1055: break;
1056: case 'R':
1057: delete_host = 1;
1058: rr_hostname = optarg;
1059: break;
1.12 markus 1060: case 'l':
1061: print_fingerprint = 1;
1062: break;
1.49 markus 1063: case 'B':
1064: print_bubblebabble = 1;
1065: break;
1.12 markus 1066: case 'p':
1067: change_passphrase = 1;
1068: break;
1069: case 'c':
1070: change_comment = 1;
1071: break;
1072: case 'f':
1.122.2.1 brad 1073: if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1074: sizeof(identity_file))
1075: fatal("Identity filename too long");
1.12 markus 1076: have_identity = 1;
1077: break;
1.105 jakob 1078: case 'g':
1079: print_generic = 1;
1080: break;
1.12 markus 1081: case 'P':
1082: identity_passphrase = optarg;
1083: break;
1084: case 'N':
1085: identity_new_passphrase = optarg;
1086: break;
1087: case 'C':
1088: identity_comment = optarg;
1089: break;
1090: case 'q':
1091: quiet = 1;
1.20 deraadt 1092: break;
1.57 markus 1093: case 'e':
1.19 markus 1094: case 'x':
1.57 markus 1095: /* export key */
1.19 markus 1096: convert_to_ssh2 = 1;
1097: break;
1.57 markus 1098: case 'i':
1.19 markus 1099: case 'X':
1.57 markus 1100: /* import key */
1.19 markus 1101: convert_from_ssh2 = 1;
1102: break;
1103: case 'y':
1104: print_public = 1;
1.47 jakob 1105: break;
1.19 markus 1106: case 'd':
1.33 markus 1107: key_type_name = "dsa";
1.19 markus 1108: break;
1.33 markus 1109: case 't':
1110: key_type_name = optarg;
1111: break;
1.75 markus 1112: case 'D':
1113: download = 1;
1.76 jakob 1114: case 'U':
1.75 markus 1115: reader_id = optarg;
1.66 markus 1116: break;
1.113 djm 1117: case 'v':
1118: if (log_level == SYSLOG_LEVEL_INFO)
1119: log_level = SYSLOG_LEVEL_DEBUG1;
1120: else {
1.117 deraadt 1121: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 1122: log_level < SYSLOG_LEVEL_DEBUG3)
1123: log_level++;
1124: }
1125: break;
1.105 jakob 1126: case 'r':
1.119 djm 1127: rr_hostname = optarg;
1.105 jakob 1128: break;
1.107 djm 1129: case 'W':
1.122.2.1 brad 1130: generator_wanted = strtonum(optarg, 1, UINT_MAX, &errstr);
1131: if (errstr)
1132: fatal("Desired generator has bad value: %s (%s)",
1133: optarg, errstr);
1.107 djm 1134: break;
1135: case 'a':
1.122.2.1 brad 1136: trials = strtonum(optarg, 1, UINT_MAX, &errstr);
1137: if (errstr)
1138: fatal("Invalid number of trials: %s (%s)",
1139: optarg, errstr);
1.107 djm 1140: break;
1141: case 'M':
1.122.2.1 brad 1142: memory = strtonum(optarg, 1, UINT_MAX, &errstr);
1143: if (errstr) {
1144: fatal("Memory limit is %s: %s", errstr, optarg);
1145: }
1.107 djm 1146: break;
1147: case 'G':
1148: do_gen_candidates = 1;
1.122.2.1 brad 1149: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1150: sizeof(out_file))
1151: fatal("Output filename too long");
1.107 djm 1152: break;
1153: case 'T':
1154: do_screen_candidates = 1;
1.122.2.1 brad 1155: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1156: sizeof(out_file))
1157: fatal("Output filename too long");
1.107 djm 1158: break;
1159: case 'S':
1160: /* XXX - also compare length against bits */
1161: if (BN_hex2bn(&start, optarg) == 0)
1162: fatal("Invalid start point.");
1163: break;
1.12 markus 1164: case '?':
1165: default:
1166: usage();
1167: }
1168: }
1.113 djm 1169:
1170: /* reinit */
1171: log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1);
1172:
1.12 markus 1173: if (optind < ac) {
1174: printf("Too many arguments.\n");
1.87 djm 1175: usage();
1176: }
1.12 markus 1177: if (change_passphrase && change_comment) {
1178: printf("Can only have one of -p and -c.\n");
1179: usage();
1180: }
1.119 djm 1181: if (delete_host || hash_hosts || find_host)
1182: do_known_hosts(pw, rr_hostname);
1.49 markus 1183: if (print_fingerprint || print_bubblebabble)
1.12 markus 1184: do_fingerprint(pw);
1185: if (change_passphrase)
1186: do_change_passphrase(pw);
1187: if (change_comment)
1188: do_change_comment(pw);
1.19 markus 1189: if (convert_to_ssh2)
1190: do_convert_to_ssh2(pw);
1191: if (convert_from_ssh2)
1192: do_convert_from_ssh2(pw);
1193: if (print_public)
1194: do_print_public(pw);
1.119 djm 1195: if (rr_hostname != NULL) {
1196: do_print_resource_record(pw, rr_hostname);
1.105 jakob 1197: }
1.75 markus 1198: if (reader_id != NULL) {
1.74 markus 1199: #ifdef SMARTCARD
1.75 markus 1200: if (download)
1201: do_download(pw, reader_id);
1202: else
1203: do_upload(pw, reader_id);
1.78 jakob 1204: #else /* SMARTCARD */
1.74 markus 1205: fatal("no support for smartcards.");
1.78 jakob 1206: #endif /* SMARTCARD */
1.107 djm 1207: }
1208:
1209: if (do_gen_candidates) {
1210: FILE *out = fopen(out_file, "w");
1.111 djm 1211:
1.107 djm 1212: if (out == NULL) {
1213: error("Couldn't open modulus candidate file \"%s\": %s",
1214: out_file, strerror(errno));
1215: return (1);
1216: }
1.122.2.2! brad 1217: if (bits == 0)
! 1218: bits = DEFAULT_BITS;
1.107 djm 1219: if (gen_candidates(out, memory, bits, start) != 0)
1.122.2.2! brad 1220: fatal("modulus candidate generation failed");
1.107 djm 1221:
1222: return (0);
1223: }
1224:
1225: if (do_screen_candidates) {
1226: FILE *in;
1227: FILE *out = fopen(out_file, "w");
1228:
1229: if (have_identity && strcmp(identity_file, "-") != 0) {
1230: if ((in = fopen(identity_file, "r")) == NULL) {
1231: fatal("Couldn't open modulus candidate "
1.111 djm 1232: "file \"%s\": %s", identity_file,
1.107 djm 1233: strerror(errno));
1234: }
1235: } else
1236: in = stdin;
1237:
1238: if (out == NULL) {
1239: fatal("Couldn't open moduli file \"%s\": %s",
1240: out_file, strerror(errno));
1241: }
1242: if (prime_test(in, out, trials, generator_wanted) != 0)
1.122.2.2! brad 1243: fatal("modulus screening failed");
1.108 markus 1244: return (0);
1.75 markus 1245: }
1.12 markus 1246:
1247: arc4random_stir();
1248:
1.122.2.2! brad 1249: if (key_type_name == NULL)
! 1250: key_type_name = "rsa";
! 1251:
1.35 markus 1252: type = key_type_from_name(key_type_name);
1253: if (type == KEY_UNSPEC) {
1254: fprintf(stderr, "unknown key type %s\n", key_type_name);
1255: exit(1);
1.19 markus 1256: }
1.122.2.2! brad 1257: if (bits == 0)
! 1258: bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
! 1259: if (type == KEY_DSA && bits != 1024)
! 1260: fatal("DSA keys must be 1024 bits");
1.33 markus 1261: if (!quiet)
1.35 markus 1262: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 1263: private = key_generate(type, bits);
1264: if (private == NULL) {
1265: fprintf(stderr, "key_generate failed");
1266: exit(1);
1267: }
1268: public = key_from_private(private);
1.12 markus 1269:
1270: if (!have_identity)
1271: ask_filename(pw, "Enter file in which to save the key");
1272:
1.122.2.2! brad 1273: /* Create ~/.ssh directory if it doesn't already exist. */
1.40 markus 1274: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1.12 markus 1275: if (strstr(identity_file, dotsshdir) != NULL &&
1276: stat(dotsshdir, &st) < 0) {
1.29 djm 1277: if (mkdir(dotsshdir, 0700) < 0)
1.12 markus 1278: error("Could not create directory '%s'.", dotsshdir);
1279: else if (!quiet)
1280: printf("Created directory '%s'.\n", dotsshdir);
1281: }
1282: /* If the file already exists, ask the user to confirm. */
1283: if (stat(identity_file, &st) >= 0) {
1284: char yesno[3];
1285: printf("%s already exists.\n", identity_file);
1286: printf("Overwrite (y/n)? ");
1287: fflush(stdout);
1288: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1289: exit(1);
1290: if (yesno[0] != 'y' && yesno[0] != 'Y')
1291: exit(1);
1292: }
1293: /* Ask for a passphrase (twice). */
1294: if (identity_passphrase)
1295: passphrase1 = xstrdup(identity_passphrase);
1296: else if (identity_new_passphrase)
1297: passphrase1 = xstrdup(identity_new_passphrase);
1298: else {
1299: passphrase_again:
1300: passphrase1 =
1.65 markus 1301: read_passphrase("Enter passphrase (empty for no "
1302: "passphrase): ", RP_ALLOW_STDIN);
1303: passphrase2 = read_passphrase("Enter same passphrase again: ",
1304: RP_ALLOW_STDIN);
1.12 markus 1305: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 1306: /*
1307: * The passphrases do not match. Clear them and
1308: * retry.
1309: */
1.12 markus 1310: memset(passphrase1, 0, strlen(passphrase1));
1311: memset(passphrase2, 0, strlen(passphrase2));
1312: xfree(passphrase1);
1313: xfree(passphrase2);
1314: printf("Passphrases do not match. Try again.\n");
1315: goto passphrase_again;
1316: }
1317: /* Clear the other copy of the passphrase. */
1318: memset(passphrase2, 0, strlen(passphrase2));
1319: xfree(passphrase2);
1320: }
1321:
1322: if (identity_comment) {
1323: strlcpy(comment, identity_comment, sizeof(comment));
1324: } else {
1.18 markus 1325: /* Create default commend field for the passphrase. */
1.12 markus 1326: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1327: }
1328:
1329: /* Save the key with the given passphrase and comment. */
1.52 markus 1330: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 1331: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1332: memset(passphrase1, 0, strlen(passphrase1));
1333: xfree(passphrase1);
1334: exit(1);
1335: }
1336: /* Clear the passphrase. */
1337: memset(passphrase1, 0, strlen(passphrase1));
1338: xfree(passphrase1);
1339:
1340: /* Clear the private key and the random number generator. */
1.33 markus 1341: key_free(private);
1.12 markus 1342: arc4random_stir();
1343:
1344: if (!quiet)
1345: printf("Your identification has been saved in %s.\n", identity_file);
1346:
1347: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1348: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1349: if (fd == -1) {
1.12 markus 1350: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 1351: exit(1);
1352: }
1353: f = fdopen(fd, "w");
1354: if (f == NULL) {
1355: printf("fdopen %s failed", identity_file);
1.12 markus 1356: exit(1);
1357: }
1.19 markus 1358: if (!key_write(public, f))
1359: fprintf(stderr, "write key failed");
1360: fprintf(f, " %s\n", comment);
1.12 markus 1361: fclose(f);
1362:
1363: if (!quiet) {
1.50 markus 1364: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.19 markus 1365: printf("Your public key has been saved in %s.\n",
1366: identity_file);
1.12 markus 1367: printf("The key fingerprint is:\n");
1.50 markus 1368: printf("%s %s\n", fp, comment);
1369: xfree(fp);
1.12 markus 1370: }
1.19 markus 1371:
1372: key_free(public);
1.12 markus 1373: exit(0);
1.1 deraadt 1374: }
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