Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.201
1.201 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.198 2010/08/12 23:34:38 tedu 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
1.200 djm 52: #define DEFAULT_BITS_ECDSA 521
1.130 markus 53: u_int32_t bits = 0;
1.1 deraadt 54:
1.14 markus 55: /*
56: * Flag indicating that we just want to change the passphrase. This can be
57: * set on the command line.
58: */
1.1 deraadt 59: int change_passphrase = 0;
60:
1.14 markus 61: /*
62: * Flag indicating that we just want to change the comment. This can be set
63: * on the command line.
64: */
1.1 deraadt 65: int change_comment = 0;
66:
1.2 provos 67: int quiet = 0;
68:
1.169 grunk 69: int log_level = SYSLOG_LEVEL_INFO;
70:
1.119 djm 71: /* Flag indicating that we want to hash a known_hosts file */
72: int hash_hosts = 0;
73: /* Flag indicating that we want lookup a host in known_hosts file */
74: int find_host = 0;
75: /* Flag indicating that we want to delete a host from a known_hosts file */
76: int delete_host = 0;
77:
1.182 djm 78: /* Flag indicating that we want to show the contents of a certificate */
79: int show_cert = 0;
80:
1.8 markus 81: /* Flag indicating that we just want to see the key fingerprint */
82: int print_fingerprint = 0;
1.49 markus 83: int print_bubblebabble = 0;
1.8 markus 84:
1.10 markus 85: /* The identity file name, given on the command line or entered by the user. */
86: char identity_file[1024];
87: int have_identity = 0;
1.1 deraadt 88:
89: /* This is set to the passphrase if given on the command line. */
90: char *identity_passphrase = NULL;
91:
92: /* This is set to the new passphrase if given on the command line. */
93: char *identity_new_passphrase = NULL;
94:
95: /* This is set to the new comment if given on the command line. */
96: char *identity_comment = NULL;
97:
1.179 djm 98: /* Path to CA key when certifying keys. */
99: char *ca_key_path = NULL;
100:
1.186 djm 101: /* Certificate serial number */
102: long long cert_serial = 0;
103:
1.179 djm 104: /* Key type when certifying */
105: u_int cert_key_type = SSH2_CERT_TYPE_USER;
106:
107: /* "key ID" of signed key */
108: char *cert_key_id = NULL;
109:
110: /* Comma-separated list of principal names for certifying keys */
111: char *cert_principals = NULL;
112:
113: /* Validity period for certificates */
114: u_int64_t cert_valid_from = 0;
115: u_int64_t cert_valid_to = ~0ULL;
116:
1.186 djm 117: /* Certificate options */
1.190 djm 118: #define CERTOPT_X_FWD (1)
119: #define CERTOPT_AGENT_FWD (1<<1)
120: #define CERTOPT_PORT_FWD (1<<2)
121: #define CERTOPT_PTY (1<<3)
122: #define CERTOPT_USER_RC (1<<4)
123: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
124: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
125: u_int32_t certflags_flags = CERTOPT_DEFAULT;
126: char *certflags_command = NULL;
127: char *certflags_src_addr = NULL;
1.179 djm 128:
1.193 djm 129: /* Conversion to/from various formats */
130: int convert_to = 0;
131: int convert_from = 0;
132: enum {
133: FMT_RFC4716,
134: FMT_PKCS8,
135: FMT_PEM
136: } convert_format = FMT_RFC4716;
1.19 markus 137: int print_public = 0;
1.105 jakob 138: int print_generic = 0;
1.33 markus 139:
1.87 djm 140: char *key_type_name = NULL;
1.19 markus 141:
1.197 djm 142: /* Load key from this PKCS#11 provider */
143: char *pkcs11provider = NULL;
1.193 djm 144:
1.10 markus 145: /* argv0 */
146: extern char *__progname;
1.1 deraadt 147:
1.19 markus 148: char hostname[MAXHOSTNAMELEN];
149:
1.115 djm 150: /* moduli.c */
1.124 avsm 151: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.115 djm 152: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
153:
1.63 itojun 154: static void
1.10 markus 155: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 156: {
1.12 markus 157: char buf[1024];
1.35 markus 158: char *name = NULL;
159:
1.92 stevesk 160: if (key_type_name == NULL)
1.40 markus 161: name = _PATH_SSH_CLIENT_ID_RSA;
1.140 deraadt 162: else {
1.92 stevesk 163: switch (key_type_from_name(key_type_name)) {
164: case KEY_RSA1:
165: name = _PATH_SSH_CLIENT_IDENTITY;
166: break;
1.186 djm 167: case KEY_DSA_CERT:
168: case KEY_DSA_CERT_V00:
1.92 stevesk 169: case KEY_DSA:
170: name = _PATH_SSH_CLIENT_ID_DSA;
171: break;
1.200 djm 172: case KEY_ECDSA_CERT:
173: case KEY_ECDSA:
174: name = _PATH_SSH_CLIENT_ID_ECDSA;
175: break;
1.186 djm 176: case KEY_RSA_CERT:
177: case KEY_RSA_CERT_V00:
1.92 stevesk 178: case KEY_RSA:
179: name = _PATH_SSH_CLIENT_ID_RSA;
180: break;
181: default:
1.173 tobias 182: fprintf(stderr, "bad key type\n");
1.92 stevesk 183: exit(1);
184: break;
185: }
1.140 deraadt 186: }
1.35 markus 187: snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
1.37 markus 188: fprintf(stderr, "%s (%s): ", prompt, identity_file);
1.12 markus 189: if (fgets(buf, sizeof(buf), stdin) == NULL)
190: exit(1);
1.162 gilles 191: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 192: if (strcmp(buf, "") != 0)
193: strlcpy(identity_file, buf, sizeof(identity_file));
194: have_identity = 1;
1.7 markus 195: }
196:
1.63 itojun 197: static Key *
1.61 markus 198: load_identity(char *filename)
1.19 markus 199: {
1.52 markus 200: char *pass;
201: Key *prv;
202:
1.55 markus 203: prv = key_load_private(filename, "", NULL);
1.52 markus 204: if (prv == NULL) {
1.61 markus 205: if (identity_passphrase)
206: pass = xstrdup(identity_passphrase);
207: else
1.65 markus 208: pass = read_passphrase("Enter passphrase: ",
209: RP_ALLOW_STDIN);
1.52 markus 210: prv = key_load_private(filename, pass, NULL);
1.19 markus 211: memset(pass, 0, strlen(pass));
212: xfree(pass);
213: }
1.52 markus 214: return prv;
1.19 markus 215: }
216:
1.32 markus 217: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 218: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 219: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 220: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 221:
1.63 itojun 222: static void
1.193 djm 223: do_convert_to_ssh2(struct passwd *pw, Key *k)
1.19 markus 224: {
1.94 markus 225: u_int len;
1.36 markus 226: u_char *blob;
1.176 djm 227: char comment[61];
1.19 markus 228:
1.81 markus 229: if (key_to_blob(k, &blob, &len) <= 0) {
230: fprintf(stderr, "key_to_blob failed\n");
231: exit(1);
232: }
1.176 djm 233: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
234: snprintf(comment, sizeof(comment),
235: "%u-bit %s, converted by %s@%s from OpenSSH",
1.59 markus 236: key_size(k), key_type(k),
1.19 markus 237: pw->pw_name, hostname);
1.176 djm 238:
239: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
240: fprintf(stdout, "Comment: \"%s\"\n", comment);
1.19 markus 241: dump_base64(stdout, blob, len);
1.32 markus 242: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.59 markus 243: key_free(k);
1.21 markus 244: xfree(blob);
1.19 markus 245: exit(0);
246: }
247:
1.63 itojun 248: static void
1.193 djm 249: do_convert_to_pkcs8(Key *k)
250: {
251: switch (key_type_plain(k->type)) {
252: case KEY_RSA:
253: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
254: fatal("PEM_write_RSA_PUBKEY failed");
255: break;
256: case KEY_DSA:
257: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
258: fatal("PEM_write_DSA_PUBKEY failed");
259: break;
1.200 djm 260: case KEY_ECDSA:
261: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
262: fatal("PEM_write_EC_PUBKEY failed");
263: break;
1.193 djm 264: default:
265: fatal("%s: unsupported key type %s", __func__, key_type(k));
266: }
267: exit(0);
268: }
269:
270: static void
271: do_convert_to_pem(Key *k)
272: {
273: switch (key_type_plain(k->type)) {
274: case KEY_RSA:
275: if (!PEM_write_RSAPublicKey(stdout, k->rsa))
276: fatal("PEM_write_RSAPublicKey failed");
277: break;
278: #if notyet /* OpenSSH 0.9.8 lacks this function */
279: case KEY_DSA:
280: if (!PEM_write_DSAPublicKey(stdout, k->dsa))
281: fatal("PEM_write_DSAPublicKey failed");
282: break;
283: #endif
1.200 djm 284: /* XXX ECDSA? */
1.193 djm 285: default:
286: fatal("%s: unsupported key type %s", __func__, key_type(k));
287: }
288: exit(0);
289: }
290:
291: static void
292: do_convert_to(struct passwd *pw)
293: {
294: Key *k;
295: struct stat st;
296:
297: if (!have_identity)
298: ask_filename(pw, "Enter file in which the key is");
299: if (stat(identity_file, &st) < 0)
300: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
301: if ((k = key_load_public(identity_file, NULL)) == NULL) {
302: if ((k = load_identity(identity_file)) == NULL) {
303: fprintf(stderr, "load failed\n");
304: exit(1);
305: }
306: }
307: if (k->type == KEY_RSA1) {
308: fprintf(stderr, "version 1 keys are not supported\n");
309: exit(1);
310: }
311:
312: switch (convert_format) {
313: case FMT_RFC4716:
314: do_convert_to_ssh2(pw, k);
315: break;
316: case FMT_PKCS8:
317: do_convert_to_pkcs8(k);
318: break;
319: case FMT_PEM:
320: do_convert_to_pem(k);
321: break;
322: default:
323: fatal("%s: unknown key format %d", __func__, convert_format);
324: }
325: exit(0);
326: }
327:
328: static void
1.32 markus 329: buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
330: {
1.116 avsm 331: u_int bignum_bits = buffer_get_int(b);
332: u_int bytes = (bignum_bits + 7) / 8;
1.53 markus 333:
1.32 markus 334: if (buffer_len(b) < bytes)
1.53 markus 335: fatal("buffer_get_bignum_bits: input buffer too small: "
336: "need %d have %d", bytes, buffer_len(b));
1.155 markus 337: if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
338: fatal("buffer_get_bignum_bits: BN_bin2bn failed");
1.32 markus 339: buffer_consume(b, bytes);
340: }
341:
1.63 itojun 342: static Key *
1.93 markus 343: do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
1.32 markus 344: {
345: Buffer b;
346: Key *key = NULL;
1.64 markus 347: char *type, *cipher;
1.69 stevesk 348: u_char *sig, data[] = "abcde12345";
1.62 markus 349: int magic, rlen, ktype, i1, i2, i3, i4;
1.64 markus 350: u_int slen;
1.62 markus 351: u_long e;
1.32 markus 352:
353: buffer_init(&b);
354: buffer_append(&b, blob, blen);
355:
1.160 stevesk 356: magic = buffer_get_int(&b);
1.32 markus 357: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
358: error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
359: buffer_free(&b);
360: return NULL;
361: }
1.62 markus 362: i1 = buffer_get_int(&b);
1.32 markus 363: type = buffer_get_string(&b, NULL);
364: cipher = buffer_get_string(&b, NULL);
1.62 markus 365: i2 = buffer_get_int(&b);
366: i3 = buffer_get_int(&b);
367: i4 = buffer_get_int(&b);
1.158 stevesk 368: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 369: if (strcmp(cipher, "none") != 0) {
370: error("unsupported cipher %s", cipher);
371: xfree(cipher);
372: buffer_free(&b);
1.53 markus 373: xfree(type);
1.32 markus 374: return NULL;
375: }
376: xfree(cipher);
377:
1.53 markus 378: if (strstr(type, "dsa")) {
379: ktype = KEY_DSA;
380: } else if (strstr(type, "rsa")) {
381: ktype = KEY_RSA;
382: } else {
1.118 markus 383: buffer_free(&b);
1.53 markus 384: xfree(type);
1.32 markus 385: return NULL;
386: }
1.53 markus 387: key = key_new_private(ktype);
388: xfree(type);
389:
390: switch (key->type) {
391: case KEY_DSA:
392: buffer_get_bignum_bits(&b, key->dsa->p);
393: buffer_get_bignum_bits(&b, key->dsa->g);
394: buffer_get_bignum_bits(&b, key->dsa->q);
395: buffer_get_bignum_bits(&b, key->dsa->pub_key);
396: buffer_get_bignum_bits(&b, key->dsa->priv_key);
397: break;
398: case KEY_RSA:
1.160 stevesk 399: e = buffer_get_char(&b);
1.62 markus 400: debug("e %lx", e);
401: if (e < 30) {
402: e <<= 8;
403: e += buffer_get_char(&b);
404: debug("e %lx", e);
405: e <<= 8;
406: e += buffer_get_char(&b);
407: debug("e %lx", e);
408: }
409: if (!BN_set_word(key->rsa->e, e)) {
1.53 markus 410: buffer_free(&b);
411: key_free(key);
412: return NULL;
413: }
414: buffer_get_bignum_bits(&b, key->rsa->d);
415: buffer_get_bignum_bits(&b, key->rsa->n);
416: buffer_get_bignum_bits(&b, key->rsa->iqmp);
417: buffer_get_bignum_bits(&b, key->rsa->q);
418: buffer_get_bignum_bits(&b, key->rsa->p);
1.68 markus 419: rsa_generate_additional_parameters(key->rsa);
1.53 markus 420: break;
421: }
1.32 markus 422: rlen = buffer_len(&b);
1.85 deraadt 423: if (rlen != 0)
1.53 markus 424: error("do_convert_private_ssh2_from_blob: "
425: "remaining bytes in key blob %d", rlen);
1.32 markus 426: buffer_free(&b);
1.64 markus 427:
428: /* try the key */
429: key_sign(key, &sig, &slen, data, sizeof(data));
430: key_verify(key, sig, slen, data, sizeof(data));
431: xfree(sig);
1.32 markus 432: return key;
433: }
434:
1.137 dtucker 435: static int
436: get_line(FILE *fp, char *line, size_t len)
437: {
438: int c;
439: size_t pos = 0;
440:
441: line[0] = '\0';
442: while ((c = fgetc(fp)) != EOF) {
443: if (pos >= len - 1) {
444: fprintf(stderr, "input line too long.\n");
445: exit(1);
446: }
1.140 deraadt 447: switch (c) {
1.137 dtucker 448: case '\r':
449: c = fgetc(fp);
450: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
451: fprintf(stderr, "unget: %s\n", strerror(errno));
452: exit(1);
453: }
454: return pos;
455: case '\n':
456: return pos;
457: }
458: line[pos++] = c;
459: line[pos] = '\0';
460: }
1.157 stevesk 461: /* We reached EOF */
462: return -1;
1.137 dtucker 463: }
464:
1.63 itojun 465: static void
1.193 djm 466: do_convert_from_ssh2(struct passwd *pw, Key **k, int *private)
1.19 markus 467: {
468: int blen;
1.98 markus 469: u_int len;
1.137 dtucker 470: char line[1024];
1.80 stevesk 471: u_char blob[8096];
1.19 markus 472: char encoded[8096];
1.193 djm 473: int escaped = 0;
1.19 markus 474: FILE *fp;
475:
1.191 djm 476: if ((fp = fopen(identity_file, "r")) == NULL)
477: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 478: encoded[0] = '\0';
1.137 dtucker 479: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
480: if (line[blen - 1] == '\\')
1.25 markus 481: escaped++;
1.19 markus 482: if (strncmp(line, "----", 4) == 0 ||
483: strstr(line, ": ") != NULL) {
1.32 markus 484: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 485: *private = 1;
1.64 markus 486: if (strstr(line, " END ") != NULL) {
487: break;
488: }
1.60 markus 489: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 490: continue;
491: }
1.25 markus 492: if (escaped) {
493: escaped--;
1.60 markus 494: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 495: continue;
1.19 markus 496: }
497: strlcat(encoded, line, sizeof(encoded));
498: }
1.98 markus 499: len = strlen(encoded);
500: if (((len % 4) == 3) &&
501: (encoded[len-1] == '=') &&
502: (encoded[len-2] == '=') &&
503: (encoded[len-3] == '='))
504: encoded[len-3] = '\0';
1.91 stevesk 505: blen = uudecode(encoded, blob, sizeof(blob));
1.19 markus 506: if (blen < 0) {
507: fprintf(stderr, "uudecode failed.\n");
508: exit(1);
509: }
1.193 djm 510: *k = *private ?
1.32 markus 511: do_convert_private_ssh2_from_blob(blob, blen) :
1.33 markus 512: key_from_blob(blob, blen);
1.193 djm 513: if (*k == NULL) {
1.32 markus 514: fprintf(stderr, "decode blob failed.\n");
515: exit(1);
516: }
1.193 djm 517: fclose(fp);
518: }
519:
520: static void
521: do_convert_from_pkcs8(Key **k, int *private)
522: {
523: EVP_PKEY *pubkey;
524: FILE *fp;
525:
526: if ((fp = fopen(identity_file, "r")) == NULL)
527: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
528: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
529: fatal("%s: %s is not a recognised public key format", __func__,
530: identity_file);
531: }
532: fclose(fp);
533: switch (EVP_PKEY_type(pubkey->type)) {
534: case EVP_PKEY_RSA:
535: *k = key_new(KEY_UNSPEC);
536: (*k)->type = KEY_RSA;
537: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
538: break;
539: case EVP_PKEY_DSA:
540: *k = key_new(KEY_UNSPEC);
541: (*k)->type = KEY_DSA;
542: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
543: break;
1.200 djm 544: case EVP_PKEY_EC:
545: *k = key_new(KEY_UNSPEC);
546: (*k)->type = KEY_ECDSA;
547: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
548: (*k)->ecdsa_nid = key_ecdsa_group_to_nid(
549: EC_KEY_get0_group((*k)->ecdsa));
550: break;
1.193 djm 551: default:
552: fatal("%s: unsupported pubkey type %d", __func__,
553: EVP_PKEY_type(pubkey->type));
554: }
555: EVP_PKEY_free(pubkey);
556: return;
557: }
558:
559: static void
560: do_convert_from_pem(Key **k, int *private)
561: {
562: FILE *fp;
563: RSA *rsa;
564: #ifdef notyet
565: DSA *dsa;
566: #endif
567:
568: if ((fp = fopen(identity_file, "r")) == NULL)
569: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
570: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
571: *k = key_new(KEY_UNSPEC);
572: (*k)->type = KEY_RSA;
573: (*k)->rsa = rsa;
574: fclose(fp);
575: return;
576: }
577: #if notyet /* OpenSSH 0.9.8 lacks this function */
578: rewind(fp);
579: if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
580: *k = key_new(KEY_UNSPEC);
581: (*k)->type = KEY_DSA;
582: (*k)->dsa = dsa;
583: fclose(fp);
584: return;
585: }
1.200 djm 586: /* XXX ECDSA */
1.193 djm 587: #endif
588: fatal("%s: unrecognised raw private key format", __func__);
589: }
590:
591: static void
592: do_convert_from(struct passwd *pw)
593: {
594: Key *k = NULL;
1.195 djm 595: int private = 0, ok = 0;
1.193 djm 596: struct stat st;
597:
598: if (!have_identity)
599: ask_filename(pw, "Enter file in which the key is");
600: if (stat(identity_file, &st) < 0)
601: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
602:
603: switch (convert_format) {
604: case FMT_RFC4716:
605: do_convert_from_ssh2(pw, &k, &private);
606: break;
607: case FMT_PKCS8:
608: do_convert_from_pkcs8(&k, &private);
609: break;
610: case FMT_PEM:
611: do_convert_from_pem(&k, &private);
612: break;
613: default:
614: fatal("%s: unknown key format %d", __func__, convert_format);
615: }
616:
617: if (!private)
618: ok = key_write(k, stdout);
619: if (ok)
620: fprintf(stdout, "\n");
621: else {
622: switch (k->type) {
623: case KEY_DSA:
624: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
625: NULL, 0, NULL, NULL);
626: break;
1.200 djm 627: case KEY_ECDSA:
628: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
629: NULL, 0, NULL, NULL);
630: break;
1.193 djm 631: case KEY_RSA:
632: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
633: NULL, 0, NULL, NULL);
634: break;
635: default:
636: fatal("%s: unsupported key type %s", __func__,
637: key_type(k));
638: }
639: }
640:
1.32 markus 641: if (!ok) {
1.173 tobias 642: fprintf(stderr, "key write failed\n");
1.32 markus 643: exit(1);
644: }
1.19 markus 645: key_free(k);
646: exit(0);
647: }
648:
1.63 itojun 649: static void
1.19 markus 650: do_print_public(struct passwd *pw)
651: {
1.52 markus 652: Key *prv;
1.19 markus 653: struct stat st;
654:
655: if (!have_identity)
656: ask_filename(pw, "Enter file in which the key is");
657: if (stat(identity_file, &st) < 0) {
658: perror(identity_file);
659: exit(1);
660: }
1.61 markus 661: prv = load_identity(identity_file);
1.52 markus 662: if (prv == NULL) {
1.19 markus 663: fprintf(stderr, "load failed\n");
664: exit(1);
665: }
1.52 markus 666: if (!key_write(prv, stdout))
1.19 markus 667: fprintf(stderr, "key_write failed");
1.52 markus 668: key_free(prv);
1.19 markus 669: fprintf(stdout, "\n");
670: exit(0);
671: }
672:
1.66 markus 673: static void
1.197 djm 674: do_download(struct passwd *pw)
1.75 markus 675: {
1.177 markus 676: #ifdef ENABLE_PKCS11
1.97 markus 677: Key **keys = NULL;
1.177 markus 678: int i, nkeys;
1.75 markus 679:
1.177 markus 680: pkcs11_init(0);
681: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
682: if (nkeys <= 0)
683: fatal("cannot read public key from pkcs11");
684: for (i = 0; i < nkeys; i++) {
1.97 markus 685: key_write(keys[i], stdout);
686: key_free(keys[i]);
687: fprintf(stdout, "\n");
688: }
689: xfree(keys);
1.177 markus 690: pkcs11_terminate();
1.75 markus 691: exit(0);
1.177 markus 692: #else
693: fatal("no pkcs11 support");
694: #endif /* ENABLE_PKCS11 */
1.75 markus 695: }
1.66 markus 696:
1.63 itojun 697: static void
1.8 markus 698: do_fingerprint(struct passwd *pw)
699: {
1.15 markus 700: FILE *f;
1.19 markus 701: Key *public;
1.167 grunk 702: char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
1.165 djm 703: int i, skip = 0, num = 0, invalid = 1;
1.84 stevesk 704: enum fp_rep rep;
705: enum fp_type fptype;
1.12 markus 706: struct stat st;
707:
1.52 markus 708: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
709: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 710:
1.12 markus 711: if (!have_identity)
712: ask_filename(pw, "Enter file in which the key is");
713: if (stat(identity_file, &st) < 0) {
714: perror(identity_file);
715: exit(1);
716: }
1.52 markus 717: public = key_load_public(identity_file, &comment);
718: if (public != NULL) {
719: fp = key_fingerprint(public, fptype, rep);
1.175 djm 720: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
1.170 grunk 721: printf("%u %s %s (%s)\n", key_size(public), fp, comment,
722: key_type(public));
1.169 grunk 723: if (log_level >= SYSLOG_LEVEL_VERBOSE)
724: printf("%s\n", ra);
1.33 markus 725: key_free(public);
726: xfree(comment);
1.167 grunk 727: xfree(ra);
1.49 markus 728: xfree(fp);
1.15 markus 729: exit(0);
730: }
1.144 markus 731: if (comment) {
1.52 markus 732: xfree(comment);
1.144 markus 733: comment = NULL;
734: }
1.15 markus 735:
1.191 djm 736: if ((f = fopen(identity_file, "r")) == NULL)
737: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
738:
739: while (fgets(line, sizeof(line), f)) {
740: if ((cp = strchr(line, '\n')) == NULL) {
741: error("line %d too long: %.40s...",
742: num + 1, line);
743: skip = 1;
744: continue;
745: }
746: num++;
747: if (skip) {
748: skip = 0;
749: continue;
750: }
751: *cp = '\0';
752:
753: /* Skip leading whitespace, empty and comment lines. */
754: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
755: ;
756: if (!*cp || *cp == '\n' || *cp == '#')
757: continue;
758: i = strtol(cp, &ep, 10);
759: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
760: int quoted = 0;
761: comment = cp;
762: for (; *cp && (quoted || (*cp != ' ' &&
763: *cp != '\t')); cp++) {
764: if (*cp == '\\' && cp[1] == '"')
765: cp++; /* Skip both */
766: else if (*cp == '"')
767: quoted = !quoted;
1.15 markus 768: }
1.191 djm 769: if (!*cp)
1.15 markus 770: continue;
1.191 djm 771: *cp++ = '\0';
772: }
773: ep = cp;
774: public = key_new(KEY_RSA1);
775: if (key_read(public, &cp) != 1) {
776: cp = ep;
777: key_free(public);
778: public = key_new(KEY_UNSPEC);
1.38 markus 779: if (key_read(public, &cp) != 1) {
780: key_free(public);
1.191 djm 781: continue;
1.12 markus 782: }
783: }
1.191 djm 784: comment = *cp ? cp : comment;
785: fp = key_fingerprint(public, fptype, rep);
786: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
787: printf("%u %s %s (%s)\n", key_size(public), fp,
788: comment ? comment : "no comment", key_type(public));
789: if (log_level >= SYSLOG_LEVEL_VERBOSE)
790: printf("%s\n", ra);
791: xfree(ra);
792: xfree(fp);
793: key_free(public);
794: invalid = 0;
1.15 markus 795: }
1.191 djm 796: fclose(f);
797:
1.15 markus 798: if (invalid) {
1.83 markus 799: printf("%s is not a public key file.\n", identity_file);
1.15 markus 800: exit(1);
1.12 markus 801: }
802: exit(0);
1.8 markus 803: }
804:
1.119 djm 805: static void
1.179 djm 806: printhost(FILE *f, const char *name, Key *public, int ca, int hash)
1.119 djm 807: {
1.166 djm 808: if (print_fingerprint) {
809: enum fp_rep rep;
810: enum fp_type fptype;
1.167 grunk 811: char *fp, *ra;
1.166 djm 812:
813: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
814: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
815: fp = key_fingerprint(public, fptype, rep);
1.175 djm 816: ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
1.171 sthen 817: printf("%u %s %s (%s)\n", key_size(public), fp, name,
818: key_type(public));
819: if (log_level >= SYSLOG_LEVEL_VERBOSE)
820: printf("%s\n", ra);
1.167 grunk 821: xfree(ra);
1.166 djm 822: xfree(fp);
823: } else {
824: if (hash && (name = host_hash(name, NULL, 0)) == NULL)
825: fatal("hash_host failed");
1.179 djm 826: fprintf(f, "%s%s%s ", ca ? CA_MARKER : "", ca ? " " : "", name);
1.166 djm 827: if (!key_write(public, f))
828: fatal("key_write failed");
829: fprintf(f, "\n");
830: }
1.119 djm 831: }
832:
833: static void
834: do_known_hosts(struct passwd *pw, const char *name)
835: {
836: FILE *in, *out = stdout;
1.179 djm 837: Key *pub;
1.119 djm 838: char *cp, *cp2, *kp, *kp2;
839: char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
1.165 djm 840: int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
1.179 djm 841: int ca;
1.119 djm 842:
843: if (!have_identity) {
844: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
845: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
846: sizeof(identity_file))
847: fatal("Specified known hosts path too long");
848: xfree(cp);
849: have_identity = 1;
850: }
851: if ((in = fopen(identity_file, "r")) == NULL)
1.191 djm 852: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.119 djm 853:
854: /*
855: * Find hosts goes to stdout, hash and deletions happen in-place
856: * A corner case is ssh-keygen -HF foo, which should go to stdout
857: */
858: if (!find_host && (hash_hosts || delete_host)) {
859: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
860: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
861: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
862: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
863: fatal("known_hosts path too long");
864: umask(077);
865: if ((c = mkstemp(tmp)) == -1)
866: fatal("mkstemp: %s", strerror(errno));
867: if ((out = fdopen(c, "w")) == NULL) {
868: c = errno;
869: unlink(tmp);
870: fatal("fdopen: %s", strerror(c));
871: }
872: inplace = 1;
873: }
874:
875: while (fgets(line, sizeof(line), in)) {
1.163 chl 876: if ((cp = strchr(line, '\n')) == NULL) {
1.165 djm 877: error("line %d too long: %.40s...", num + 1, line);
1.119 djm 878: skip = 1;
879: invalid = 1;
880: continue;
881: }
1.163 chl 882: num++;
1.119 djm 883: if (skip) {
884: skip = 0;
885: continue;
886: }
1.163 chl 887: *cp = '\0';
1.119 djm 888:
889: /* Skip leading whitespace, empty and comment lines. */
890: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
891: ;
892: if (!*cp || *cp == '\n' || *cp == '#') {
893: if (inplace)
894: fprintf(out, "%s\n", cp);
895: continue;
896: }
1.179 djm 897: /* Check whether this is a CA key */
898: if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 &&
899: (cp[sizeof(CA_MARKER) - 1] == ' ' ||
900: cp[sizeof(CA_MARKER) - 1] == '\t')) {
901: ca = 1;
902: cp += sizeof(CA_MARKER);
903: } else
904: ca = 0;
905:
1.119 djm 906: /* Find the end of the host name portion. */
907: for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
908: ;
1.179 djm 909:
1.119 djm 910: if (*kp == '\0' || *(kp + 1) == '\0') {
911: error("line %d missing key: %.40s...",
912: num, line);
913: invalid = 1;
914: continue;
915: }
916: *kp++ = '\0';
917: kp2 = kp;
918:
1.179 djm 919: pub = key_new(KEY_RSA1);
920: if (key_read(pub, &kp) != 1) {
1.119 djm 921: kp = kp2;
1.179 djm 922: key_free(pub);
923: pub = key_new(KEY_UNSPEC);
924: if (key_read(pub, &kp) != 1) {
1.119 djm 925: error("line %d invalid key: %.40s...",
926: num, line);
1.179 djm 927: key_free(pub);
1.119 djm 928: invalid = 1;
929: continue;
930: }
931: }
932:
933: if (*cp == HASH_DELIM) {
934: if (find_host || delete_host) {
935: cp2 = host_hash(name, cp, strlen(cp));
936: if (cp2 == NULL) {
937: error("line %d: invalid hashed "
938: "name: %.64s...", num, line);
939: invalid = 1;
940: continue;
941: }
942: c = (strcmp(cp2, cp) == 0);
943: if (find_host && c) {
944: printf("# Host %s found: "
1.179 djm 945: "line %d type %s%s\n", name,
946: num, key_type(pub),
947: ca ? " (CA key)" : "");
948: printhost(out, cp, pub, ca, 0);
1.119 djm 949: }
1.179 djm 950: if (delete_host && !c && !ca)
951: printhost(out, cp, pub, ca, 0);
1.119 djm 952: } else if (hash_hosts)
1.179 djm 953: printhost(out, cp, pub, ca, 0);
1.119 djm 954: } else {
955: if (find_host || delete_host) {
956: c = (match_hostname(name, cp,
957: strlen(cp)) == 1);
958: if (find_host && c) {
959: printf("# Host %s found: "
1.179 djm 960: "line %d type %s%s\n", name,
961: num, key_type(pub),
962: ca ? " (CA key)" : "");
963: printhost(out, name, pub,
964: ca, hash_hosts && !ca);
1.119 djm 965: }
1.179 djm 966: if (delete_host && !c && !ca)
967: printhost(out, cp, pub, ca, 0);
1.119 djm 968: } else if (hash_hosts) {
1.121 deraadt 969: for (cp2 = strsep(&cp, ",");
1.119 djm 970: cp2 != NULL && *cp2 != '\0';
1.120 djm 971: cp2 = strsep(&cp, ",")) {
1.179 djm 972: if (ca) {
973: fprintf(stderr, "Warning: "
974: "ignoring CA key for host: "
975: "%.64s\n", cp2);
976: printhost(out, cp2, pub, ca, 0);
977: } else if (strcspn(cp2, "*?!") !=
978: strlen(cp2)) {
1.120 djm 979: fprintf(stderr, "Warning: "
980: "ignoring host name with "
981: "metacharacters: %.64s\n",
982: cp2);
1.179 djm 983: printhost(out, cp2, pub, ca, 0);
984: } else
985: printhost(out, cp2, pub, ca, 1);
1.120 djm 986: }
1.119 djm 987: has_unhashed = 1;
988: }
989: }
1.179 djm 990: key_free(pub);
1.119 djm 991: }
992: fclose(in);
993:
994: if (invalid) {
1.165 djm 995: fprintf(stderr, "%s is not a valid known_hosts file.\n",
1.119 djm 996: identity_file);
997: if (inplace) {
998: fprintf(stderr, "Not replacing existing known_hosts "
1.122 markus 999: "file because of errors\n");
1.119 djm 1000: fclose(out);
1001: unlink(tmp);
1002: }
1003: exit(1);
1004: }
1005:
1006: if (inplace) {
1007: fclose(out);
1008:
1009: /* Backup existing file */
1010: if (unlink(old) == -1 && errno != ENOENT)
1011: fatal("unlink %.100s: %s", old, strerror(errno));
1012: if (link(identity_file, old) == -1)
1013: fatal("link %.100s to %.100s: %s", identity_file, old,
1014: strerror(errno));
1015: /* Move new one into place */
1016: if (rename(tmp, identity_file) == -1) {
1017: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1018: strerror(errno));
1019: unlink(tmp);
1020: unlink(old);
1021: exit(1);
1022: }
1023:
1024: fprintf(stderr, "%s updated.\n", identity_file);
1025: fprintf(stderr, "Original contents retained as %s\n", old);
1026: if (has_unhashed) {
1027: fprintf(stderr, "WARNING: %s contains unhashed "
1028: "entries\n", old);
1029: fprintf(stderr, "Delete this file to ensure privacy "
1.128 djm 1030: "of hostnames\n");
1.119 djm 1031: }
1032: }
1033:
1034: exit(0);
1035: }
1036:
1.13 deraadt 1037: /*
1038: * Perform changing a passphrase. The argument is the passwd structure
1039: * for the current user.
1040: */
1.63 itojun 1041: static void
1.7 markus 1042: do_change_passphrase(struct passwd *pw)
1043: {
1.12 markus 1044: char *comment;
1045: char *old_passphrase, *passphrase1, *passphrase2;
1046: struct stat st;
1.19 markus 1047: Key *private;
1.12 markus 1048:
1049: if (!have_identity)
1050: ask_filename(pw, "Enter file in which the key is");
1051: if (stat(identity_file, &st) < 0) {
1052: perror(identity_file);
1053: exit(1);
1054: }
1055: /* Try to load the file with empty passphrase. */
1.52 markus 1056: private = key_load_private(identity_file, "", &comment);
1057: if (private == NULL) {
1.12 markus 1058: if (identity_passphrase)
1059: old_passphrase = xstrdup(identity_passphrase);
1060: else
1.65 markus 1061: old_passphrase =
1062: read_passphrase("Enter old passphrase: ",
1063: RP_ALLOW_STDIN);
1064: private = key_load_private(identity_file, old_passphrase,
1065: &comment);
1.52 markus 1066: memset(old_passphrase, 0, strlen(old_passphrase));
1067: xfree(old_passphrase);
1068: if (private == NULL) {
1.12 markus 1069: printf("Bad passphrase.\n");
1070: exit(1);
1071: }
1072: }
1073: printf("Key has comment '%s'\n", comment);
1074:
1075: /* Ask the new passphrase (twice). */
1076: if (identity_new_passphrase) {
1077: passphrase1 = xstrdup(identity_new_passphrase);
1078: passphrase2 = NULL;
1079: } else {
1080: passphrase1 =
1.65 markus 1081: read_passphrase("Enter new passphrase (empty for no "
1082: "passphrase): ", RP_ALLOW_STDIN);
1083: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1084: RP_ALLOW_STDIN);
1.12 markus 1085:
1086: /* Verify that they are the same. */
1087: if (strcmp(passphrase1, passphrase2) != 0) {
1088: memset(passphrase1, 0, strlen(passphrase1));
1089: memset(passphrase2, 0, strlen(passphrase2));
1090: xfree(passphrase1);
1091: xfree(passphrase2);
1092: printf("Pass phrases do not match. Try again.\n");
1093: exit(1);
1094: }
1095: /* Destroy the other copy. */
1096: memset(passphrase2, 0, strlen(passphrase2));
1097: xfree(passphrase2);
1098: }
1099:
1100: /* Save the file using the new passphrase. */
1.52 markus 1101: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 1102: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1103: memset(passphrase1, 0, strlen(passphrase1));
1104: xfree(passphrase1);
1.19 markus 1105: key_free(private);
1.12 markus 1106: xfree(comment);
1107: exit(1);
1108: }
1109: /* Destroy the passphrase and the copy of the key in memory. */
1110: memset(passphrase1, 0, strlen(passphrase1));
1111: xfree(passphrase1);
1.19 markus 1112: key_free(private); /* Destroys contents */
1.12 markus 1113: xfree(comment);
1.1 deraadt 1114:
1.12 markus 1115: printf("Your identification has been saved with the new passphrase.\n");
1116: exit(0);
1.1 deraadt 1117: }
1118:
1.105 jakob 1119: /*
1120: * Print the SSHFP RR.
1121: */
1.138 jakob 1122: static int
1123: do_print_resource_record(struct passwd *pw, char *fname, char *hname)
1.105 jakob 1124: {
1125: Key *public;
1126: char *comment = NULL;
1127: struct stat st;
1128:
1.138 jakob 1129: if (fname == NULL)
1.105 jakob 1130: ask_filename(pw, "Enter file in which the key is");
1.138 jakob 1131: if (stat(fname, &st) < 0) {
1132: if (errno == ENOENT)
1133: return 0;
1134: perror(fname);
1.105 jakob 1135: exit(1);
1136: }
1.138 jakob 1137: public = key_load_public(fname, &comment);
1.105 jakob 1138: if (public != NULL) {
1.116 avsm 1139: export_dns_rr(hname, public, stdout, print_generic);
1.105 jakob 1140: key_free(public);
1141: xfree(comment);
1.138 jakob 1142: return 1;
1.105 jakob 1143: }
1144: if (comment)
1145: xfree(comment);
1146:
1.138 jakob 1147: printf("failed to read v2 public key from %s.\n", fname);
1.105 jakob 1148: exit(1);
1149: }
1150:
1.13 deraadt 1151: /*
1152: * Change the comment of a private key file.
1153: */
1.63 itojun 1154: static void
1.2 provos 1155: do_change_comment(struct passwd *pw)
1.1 deraadt 1156: {
1.46 deraadt 1157: char new_comment[1024], *comment, *passphrase;
1.52 markus 1158: Key *private;
1159: Key *public;
1.12 markus 1160: struct stat st;
1161: FILE *f;
1.46 deraadt 1162: int fd;
1.12 markus 1163:
1164: if (!have_identity)
1165: ask_filename(pw, "Enter file in which the key is");
1166: if (stat(identity_file, &st) < 0) {
1167: perror(identity_file);
1168: exit(1);
1169: }
1.52 markus 1170: private = key_load_private(identity_file, "", &comment);
1171: if (private == NULL) {
1.12 markus 1172: if (identity_passphrase)
1173: passphrase = xstrdup(identity_passphrase);
1174: else if (identity_new_passphrase)
1175: passphrase = xstrdup(identity_new_passphrase);
1176: else
1.65 markus 1177: passphrase = read_passphrase("Enter passphrase: ",
1178: RP_ALLOW_STDIN);
1.12 markus 1179: /* Try to load using the passphrase. */
1.52 markus 1180: private = key_load_private(identity_file, passphrase, &comment);
1181: if (private == NULL) {
1.12 markus 1182: memset(passphrase, 0, strlen(passphrase));
1183: xfree(passphrase);
1184: printf("Bad passphrase.\n");
1185: exit(1);
1186: }
1.52 markus 1187: } else {
1188: passphrase = xstrdup("");
1.12 markus 1189: }
1.52 markus 1190: if (private->type != KEY_RSA1) {
1191: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
1192: key_free(private);
1193: exit(1);
1.86 deraadt 1194: }
1.12 markus 1195: printf("Key now has comment '%s'\n", comment);
1196:
1197: if (identity_comment) {
1198: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1199: } else {
1200: printf("Enter new comment: ");
1201: fflush(stdout);
1202: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1203: memset(passphrase, 0, strlen(passphrase));
1.19 markus 1204: key_free(private);
1.12 markus 1205: exit(1);
1206: }
1.162 gilles 1207: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1208: }
1209:
1210: /* Save the file using the new passphrase. */
1.52 markus 1211: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 1212: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1213: memset(passphrase, 0, strlen(passphrase));
1214: xfree(passphrase);
1.19 markus 1215: key_free(private);
1.12 markus 1216: xfree(comment);
1217: exit(1);
1218: }
1219: memset(passphrase, 0, strlen(passphrase));
1220: xfree(passphrase);
1.52 markus 1221: public = key_from_private(private);
1.19 markus 1222: key_free(private);
1.12 markus 1223:
1224: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1225: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1226: if (fd == -1) {
1.12 markus 1227: printf("Could not save your public key in %s\n", identity_file);
1228: exit(1);
1229: }
1.46 deraadt 1230: f = fdopen(fd, "w");
1231: if (f == NULL) {
1.173 tobias 1232: printf("fdopen %s failed\n", identity_file);
1.46 deraadt 1233: exit(1);
1234: }
1.19 markus 1235: if (!key_write(public, f))
1.173 tobias 1236: fprintf(stderr, "write key failed\n");
1.19 markus 1237: key_free(public);
1238: fprintf(f, " %s\n", new_comment);
1.12 markus 1239: fclose(f);
1.1 deraadt 1240:
1.12 markus 1241: xfree(comment);
1.1 deraadt 1242:
1.12 markus 1243: printf("The comment in your key file has been changed.\n");
1244: exit(0);
1.1 deraadt 1245: }
1246:
1.179 djm 1247: static const char *
1.182 djm 1248: fmt_validity(u_int64_t valid_from, u_int64_t valid_to)
1.179 djm 1249: {
1250: char from[32], to[32];
1251: static char ret[64];
1252: time_t tt;
1253: struct tm *tm;
1254:
1255: *from = *to = '\0';
1.182 djm 1256: if (valid_from == 0 && valid_to == 0xffffffffffffffffULL)
1.179 djm 1257: return "forever";
1258:
1.182 djm 1259: if (valid_from != 0) {
1.179 djm 1260: /* XXX revisit INT_MAX in 2038 :) */
1.182 djm 1261: tt = valid_from > INT_MAX ? INT_MAX : valid_from;
1.179 djm 1262: tm = localtime(&tt);
1263: strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
1264: }
1.182 djm 1265: if (valid_to != 0xffffffffffffffffULL) {
1.179 djm 1266: /* XXX revisit INT_MAX in 2038 :) */
1.182 djm 1267: tt = valid_to > INT_MAX ? INT_MAX : valid_to;
1.179 djm 1268: tm = localtime(&tt);
1269: strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
1270: }
1271:
1.182 djm 1272: if (valid_from == 0) {
1.179 djm 1273: snprintf(ret, sizeof(ret), "before %s", to);
1274: return ret;
1275: }
1.182 djm 1276: if (valid_to == 0xffffffffffffffffULL) {
1.179 djm 1277: snprintf(ret, sizeof(ret), "after %s", from);
1278: return ret;
1279: }
1280:
1281: snprintf(ret, sizeof(ret), "from %s to %s", from, to);
1282: return ret;
1283: }
1284:
1285: static void
1.186 djm 1286: add_flag_option(Buffer *c, const char *name)
1.179 djm 1287: {
1288: debug3("%s: %s", __func__, name);
1289: buffer_put_cstring(c, name);
1290: buffer_put_string(c, NULL, 0);
1291: }
1292:
1293: static void
1.186 djm 1294: add_string_option(Buffer *c, const char *name, const char *value)
1.179 djm 1295: {
1296: Buffer b;
1297:
1298: debug3("%s: %s=%s", __func__, name, value);
1299: buffer_init(&b);
1300: buffer_put_cstring(&b, value);
1301:
1302: buffer_put_cstring(c, name);
1303: buffer_put_string(c, buffer_ptr(&b), buffer_len(&b));
1304:
1305: buffer_free(&b);
1306: }
1307:
1.190 djm 1308: #define OPTIONS_CRITICAL 1
1309: #define OPTIONS_EXTENSIONS 2
1.179 djm 1310: static void
1.190 djm 1311: prepare_options_buf(Buffer *c, int which)
1.179 djm 1312: {
1313: buffer_clear(c);
1.196 djm 1314: if ((which & OPTIONS_CRITICAL) != 0 &&
1315: certflags_command != NULL)
1316: add_string_option(c, "force-command", certflags_command);
1.190 djm 1317: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1318: (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1.186 djm 1319: add_flag_option(c, "permit-agent-forwarding");
1.190 djm 1320: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1321: (certflags_flags & CERTOPT_PORT_FWD) != 0)
1.186 djm 1322: add_flag_option(c, "permit-port-forwarding");
1.190 djm 1323: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1324: (certflags_flags & CERTOPT_PTY) != 0)
1.186 djm 1325: add_flag_option(c, "permit-pty");
1.190 djm 1326: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1327: (certflags_flags & CERTOPT_USER_RC) != 0)
1.186 djm 1328: add_flag_option(c, "permit-user-rc");
1.196 djm 1329: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1330: (certflags_flags & CERTOPT_X_FWD) != 0)
1331: add_flag_option(c, "permit-X11-forwarding");
1.190 djm 1332: if ((which & OPTIONS_CRITICAL) != 0 &&
1333: certflags_src_addr != NULL)
1334: add_string_option(c, "source-address", certflags_src_addr);
1.179 djm 1335: }
1336:
1.197 djm 1337: static Key *
1338: load_pkcs11_key(char *path)
1339: {
1340: #ifdef ENABLE_PKCS11
1341: Key **keys = NULL, *public, *private = NULL;
1342: int i, nkeys;
1343:
1344: if ((public = key_load_public(path, NULL)) == NULL)
1345: fatal("Couldn't load CA public key \"%s\"", path);
1346:
1347: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1348: debug3("%s: %d keys", __func__, nkeys);
1349: if (nkeys <= 0)
1350: fatal("cannot read public key from pkcs11");
1351: for (i = 0; i < nkeys; i++) {
1352: if (key_equal_public(public, keys[i])) {
1353: private = keys[i];
1354: continue;
1355: }
1356: key_free(keys[i]);
1357: }
1358: xfree(keys);
1359: key_free(public);
1360: return private;
1361: #else
1362: fatal("no pkcs11 support");
1363: #endif /* ENABLE_PKCS11 */
1364: }
1365:
1.179 djm 1366: static void
1367: do_ca_sign(struct passwd *pw, int argc, char **argv)
1368: {
1369: int i, fd;
1370: u_int n;
1371: Key *ca, *public;
1372: char *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1373: FILE *f;
1.186 djm 1374: int v00 = 0; /* legacy keys */
1.179 djm 1375:
1.186 djm 1376: if (key_type_name != NULL) {
1377: switch (key_type_from_name(key_type_name)) {
1378: case KEY_RSA_CERT_V00:
1379: case KEY_DSA_CERT_V00:
1380: v00 = 1;
1381: break;
1382: case KEY_UNSPEC:
1383: if (strcasecmp(key_type_name, "v00") == 0) {
1384: v00 = 1;
1385: break;
1386: } else if (strcasecmp(key_type_name, "v01") == 0)
1387: break;
1388: /* FALLTHROUGH */
1389: default:
1390: fprintf(stderr, "unknown key type %s\n", key_type_name);
1391: exit(1);
1392: }
1393: }
1394:
1.197 djm 1395: pkcs11_init(1);
1396: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1397: if (pkcs11provider != NULL) {
1398: if ((ca = load_pkcs11_key(tmp)) == NULL)
1399: fatal("No PKCS#11 key matching %s found", ca_key_path);
1400: } else if ((ca = load_identity(tmp)) == NULL)
1401: fatal("Couldn't load CA key \"%s\"", tmp);
1402: xfree(tmp);
1403:
1.179 djm 1404: for (i = 0; i < argc; i++) {
1405: /* Split list of principals */
1406: n = 0;
1407: if (cert_principals != NULL) {
1408: otmp = tmp = xstrdup(cert_principals);
1409: plist = NULL;
1410: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1411: plist = xrealloc(plist, n + 1, sizeof(*plist));
1412: if (*(plist[n] = xstrdup(cp)) == '\0')
1413: fatal("Empty principal name");
1414: }
1415: xfree(otmp);
1416: }
1417:
1418: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1419: if ((public = key_load_public(tmp, &comment)) == NULL)
1420: fatal("%s: unable to open \"%s\"", __func__, tmp);
1.200 djm 1421: if (public->type != KEY_RSA && public->type != KEY_DSA &&
1422: public->type != KEY_ECDSA)
1.179 djm 1423: fatal("%s: key \"%s\" type %s cannot be certified",
1424: __func__, tmp, key_type(public));
1425:
1426: /* Prepare certificate to sign */
1.186 djm 1427: if (key_to_certified(public, v00) != 0)
1.179 djm 1428: fatal("Could not upgrade key %s to certificate", tmp);
1429: public->cert->type = cert_key_type;
1.186 djm 1430: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1431: public->cert->key_id = xstrdup(cert_key_id);
1432: public->cert->nprincipals = n;
1433: public->cert->principals = plist;
1434: public->cert->valid_after = cert_valid_from;
1435: public->cert->valid_before = cert_valid_to;
1.190 djm 1436: if (v00) {
1437: prepare_options_buf(&public->cert->critical,
1438: OPTIONS_CRITICAL|OPTIONS_EXTENSIONS);
1439: } else {
1440: prepare_options_buf(&public->cert->critical,
1441: OPTIONS_CRITICAL);
1442: prepare_options_buf(&public->cert->extensions,
1443: OPTIONS_EXTENSIONS);
1444: }
1.179 djm 1445: public->cert->signature_key = key_from_private(ca);
1446:
1447: if (key_certify(public, ca) != 0)
1448: fatal("Couldn't not certify key %s", tmp);
1449:
1450: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1451: *cp = '\0';
1452: xasprintf(&out, "%s-cert.pub", tmp);
1453: xfree(tmp);
1454:
1455: if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1456: fatal("Could not open \"%s\" for writing: %s", out,
1457: strerror(errno));
1458: if ((f = fdopen(fd, "w")) == NULL)
1459: fatal("%s: fdopen: %s", __func__, strerror(errno));
1460: if (!key_write(public, f))
1461: fatal("Could not write certified key to %s", out);
1462: fprintf(f, " %s\n", comment);
1463: fclose(f);
1464:
1.186 djm 1465: if (!quiet) {
1466: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1467: "valid %s", key_cert_type(public),
1468: out, public->cert->key_id, public->cert->serial,
1.179 djm 1469: cert_principals != NULL ? " for " : "",
1470: cert_principals != NULL ? cert_principals : "",
1.182 djm 1471: fmt_validity(cert_valid_from, cert_valid_to));
1.186 djm 1472: }
1.179 djm 1473:
1474: key_free(public);
1475: xfree(out);
1476: }
1.197 djm 1477: pkcs11_terminate();
1.179 djm 1478: exit(0);
1479: }
1480:
1481: static u_int64_t
1482: parse_relative_time(const char *s, time_t now)
1483: {
1484: int64_t mul, secs;
1485:
1486: mul = *s == '-' ? -1 : 1;
1487:
1488: if ((secs = convtime(s + 1)) == -1)
1489: fatal("Invalid relative certificate time %s", s);
1490: if (mul == -1 && secs > now)
1491: fatal("Certificate time %s cannot be represented", s);
1492: return now + (u_int64_t)(secs * mul);
1493: }
1494:
1495: static u_int64_t
1496: parse_absolute_time(const char *s)
1497: {
1498: struct tm tm;
1499: time_t tt;
1.180 djm 1500: char buf[32], *fmt;
1.179 djm 1501:
1.180 djm 1502: /*
1503: * POSIX strptime says "The application shall ensure that there
1504: * is white-space or other non-alphanumeric characters between
1505: * any two conversion specifications" so arrange things this way.
1506: */
1507: switch (strlen(s)) {
1508: case 8:
1.184 djm 1509: fmt = "%Y-%m-%d";
1510: snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
1.180 djm 1511: break;
1512: case 14:
1.184 djm 1513: fmt = "%Y-%m-%dT%H:%M:%S";
1514: snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
1.180 djm 1515: s, s + 4, s + 6, s + 8, s + 10, s + 12);
1516: break;
1517: default:
1.179 djm 1518: fatal("Invalid certificate time format %s", s);
1.180 djm 1519: }
1.179 djm 1520:
1521: bzero(&tm, sizeof(tm));
1.180 djm 1522: if (strptime(buf, fmt, &tm) == NULL)
1.179 djm 1523: fatal("Invalid certificate time %s", s);
1524: if ((tt = mktime(&tm)) < 0)
1525: fatal("Certificate time %s cannot be represented", s);
1526: return (u_int64_t)tt;
1527: }
1528:
1529: static void
1530: parse_cert_times(char *timespec)
1531: {
1532: char *from, *to;
1533: time_t now = time(NULL);
1534: int64_t secs;
1535:
1536: /* +timespec relative to now */
1537: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1538: if ((secs = convtime(timespec + 1)) == -1)
1539: fatal("Invalid relative certificate life %s", timespec);
1540: cert_valid_to = now + secs;
1541: /*
1542: * Backdate certificate one minute to avoid problems on hosts
1543: * with poorly-synchronised clocks.
1544: */
1545: cert_valid_from = ((now - 59)/ 60) * 60;
1546: return;
1547: }
1548:
1549: /*
1550: * from:to, where
1551: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1552: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1553: */
1554: from = xstrdup(timespec);
1555: to = strchr(from, ':');
1556: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1557: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1558: *to++ = '\0';
1559:
1560: if (*from == '-' || *from == '+')
1561: cert_valid_from = parse_relative_time(from, now);
1562: else
1563: cert_valid_from = parse_absolute_time(from);
1564:
1565: if (*to == '-' || *to == '+')
1566: cert_valid_to = parse_relative_time(to, cert_valid_from);
1567: else
1568: cert_valid_to = parse_absolute_time(to);
1569:
1570: if (cert_valid_to <= cert_valid_from)
1571: fatal("Empty certificate validity interval");
1572: xfree(from);
1573: }
1574:
1575: static void
1.186 djm 1576: add_cert_option(char *opt)
1.179 djm 1577: {
1578: char *val;
1579:
1580: if (strcmp(opt, "clear") == 0)
1.190 djm 1581: certflags_flags = 0;
1.179 djm 1582: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1583: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1584: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1585: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1586: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1587: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1588: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1589: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1590: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1591: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1592: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1593: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1594: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1595: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1596: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 1597: certflags_flags |= CERTOPT_PTY;
1.179 djm 1598: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 1599: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 1600: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 1601: certflags_flags |= CERTOPT_USER_RC;
1.179 djm 1602: else if (strncasecmp(opt, "force-command=", 14) == 0) {
1603: val = opt + 14;
1604: if (*val == '\0')
1.186 djm 1605: fatal("Empty force-command option");
1.190 djm 1606: if (certflags_command != NULL)
1.179 djm 1607: fatal("force-command already specified");
1.190 djm 1608: certflags_command = xstrdup(val);
1.179 djm 1609: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1610: val = opt + 15;
1611: if (*val == '\0')
1.186 djm 1612: fatal("Empty source-address option");
1.190 djm 1613: if (certflags_src_addr != NULL)
1.179 djm 1614: fatal("source-address already specified");
1615: if (addr_match_cidr_list(NULL, val) != 0)
1616: fatal("Invalid source-address list");
1.190 djm 1617: certflags_src_addr = xstrdup(val);
1.179 djm 1618: } else
1.186 djm 1619: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 1620: }
1621:
1.63 itojun 1622: static void
1.192 djm 1623: show_options(const Buffer *optbuf, int v00, int in_critical)
1624: {
1625: u_char *name, *data;
1626: u_int dlen;
1627: Buffer options, option;
1628:
1629: buffer_init(&options);
1630: buffer_append(&options, buffer_ptr(optbuf), buffer_len(optbuf));
1631:
1632: buffer_init(&option);
1633: while (buffer_len(&options) != 0) {
1634: name = buffer_get_string(&options, NULL);
1635: data = buffer_get_string_ptr(&options, &dlen);
1636: buffer_append(&option, data, dlen);
1637: printf(" %s", name);
1638: if ((v00 || !in_critical) &&
1639: (strcmp(name, "permit-X11-forwarding") == 0 ||
1640: strcmp(name, "permit-agent-forwarding") == 0 ||
1641: strcmp(name, "permit-port-forwarding") == 0 ||
1642: strcmp(name, "permit-pty") == 0 ||
1643: strcmp(name, "permit-user-rc") == 0))
1644: printf("\n");
1645: else if ((v00 || in_critical) &&
1646: (strcmp(name, "force-command") == 0 ||
1647: strcmp(name, "source-address") == 0)) {
1648: data = buffer_get_string(&option, NULL);
1649: printf(" %s\n", data);
1650: xfree(data);
1651: } else {
1652: printf(" UNKNOWN OPTION (len %u)\n",
1653: buffer_len(&option));
1654: buffer_clear(&option);
1655: }
1656: xfree(name);
1657: if (buffer_len(&option) != 0)
1658: fatal("Option corrupt: extra data at end");
1659: }
1660: buffer_free(&option);
1661: buffer_free(&options);
1662: }
1663:
1664: static void
1.182 djm 1665: do_show_cert(struct passwd *pw)
1666: {
1667: Key *key;
1668: struct stat st;
1669: char *key_fp, *ca_fp;
1.192 djm 1670: u_int i, v00;
1.182 djm 1671:
1672: if (!have_identity)
1673: ask_filename(pw, "Enter file in which the key is");
1.191 djm 1674: if (stat(identity_file, &st) < 0)
1675: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.182 djm 1676: if ((key = key_load_public(identity_file, NULL)) == NULL)
1677: fatal("%s is not a public key", identity_file);
1678: if (!key_is_cert(key))
1679: fatal("%s is not a certificate", identity_file);
1.186 djm 1680: v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00;
1681:
1.182 djm 1682: key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX);
1683: ca_fp = key_fingerprint(key->cert->signature_key,
1684: SSH_FP_MD5, SSH_FP_HEX);
1685:
1686: printf("%s:\n", identity_file);
1.186 djm 1687: printf(" Type: %s %s certificate\n", key_ssh_name(key),
1688: key_cert_type(key));
1689: printf(" Public key: %s %s\n", key_type(key), key_fp);
1690: printf(" Signing CA: %s %s\n",
1.182 djm 1691: key_type(key->cert->signature_key), ca_fp);
1.186 djm 1692: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1693: if (!v00)
1694: printf(" Serial: %llu\n", key->cert->serial);
1.182 djm 1695: printf(" Valid: %s\n",
1696: fmt_validity(key->cert->valid_after, key->cert->valid_before));
1697: printf(" Principals: ");
1698: if (key->cert->nprincipals == 0)
1699: printf("(none)\n");
1700: else {
1701: for (i = 0; i < key->cert->nprincipals; i++)
1702: printf("\n %s",
1703: key->cert->principals[i]);
1704: printf("\n");
1705: }
1.186 djm 1706: printf(" Critical Options: ");
1707: if (buffer_len(&key->cert->critical) == 0)
1.182 djm 1708: printf("(none)\n");
1709: else {
1710: printf("\n");
1.192 djm 1711: show_options(&key->cert->critical, v00, 1);
1.186 djm 1712: }
1713: if (!v00) {
1714: printf(" Extensions: ");
1715: if (buffer_len(&key->cert->extensions) == 0)
1716: printf("(none)\n");
1717: else {
1718: printf("\n");
1.192 djm 1719: show_options(&key->cert->extensions, v00, 0);
1.182 djm 1720: }
1721: }
1722: exit(0);
1723: }
1724:
1725: static void
1.10 markus 1726: usage(void)
1727: {
1.161 sobrado 1728: fprintf(stderr, "usage: %s [options]\n", __progname);
1.77 jakob 1729: fprintf(stderr, "Options:\n");
1.123 otto 1730: fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
1731: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
1.77 jakob 1732: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
1.123 otto 1733: fprintf(stderr, " -C comment Provide new comment.\n");
1.77 jakob 1734: fprintf(stderr, " -c Change comment in private and public key files.\n");
1.177 markus 1735: #ifdef ENABLE_PKCS11
1736: fprintf(stderr, " -D pkcs11 Download public key from pkcs11 token.\n");
1737: #endif
1.193 djm 1738: fprintf(stderr, " -e Export OpenSSH to foreign format key file.\n");
1.123 otto 1739: fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1.77 jakob 1740: fprintf(stderr, " -f filename Filename of the key file.\n");
1.123 otto 1741: fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1.105 jakob 1742: fprintf(stderr, " -g Use generic DNS resource record format.\n");
1.123 otto 1743: fprintf(stderr, " -H Hash names in known_hosts file.\n");
1.179 djm 1744: fprintf(stderr, " -h Generate host certificate instead of a user certificate.\n");
1745: fprintf(stderr, " -I key_id Key identifier to include in certificate.\n");
1.193 djm 1746: fprintf(stderr, " -i Import foreign format to OpenSSH key file.\n");
1.182 djm 1747: fprintf(stderr, " -L Print the contents of a certificate.\n");
1.77 jakob 1748: fprintf(stderr, " -l Show fingerprint of key file.\n");
1.194 jmc 1749: fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1.193 djm 1750: fprintf(stderr, " -m key_fmt Conversion format for -e/-i (PEM|PKCS8|RFC4716).\n");
1.194 jmc 1751: fprintf(stderr, " -N phrase Provide new passphrase.\n");
1.179 djm 1752: fprintf(stderr, " -n name,... User/host principal names to include in certificate\n");
1.187 jmc 1753: fprintf(stderr, " -O option Specify a certificate option.\n");
1.123 otto 1754: fprintf(stderr, " -P phrase Provide old passphrase.\n");
1.77 jakob 1755: fprintf(stderr, " -p Change passphrase of private key file.\n");
1756: fprintf(stderr, " -q Quiet.\n");
1.123 otto 1757: fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1758: fprintf(stderr, " -r hostname Print DNS resource record.\n");
1.194 jmc 1759: fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
1.179 djm 1760: fprintf(stderr, " -s ca_key Certify keys with CA key.\n");
1.123 otto 1761: fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
1.77 jakob 1762: fprintf(stderr, " -t type Specify type of key to create.\n");
1.179 djm 1763: fprintf(stderr, " -V from:to Specify certificate validity interval.\n");
1.123 otto 1764: fprintf(stderr, " -v Verbose.\n");
1765: fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
1766: fprintf(stderr, " -y Read private key file and print public key.\n");
1.187 jmc 1767: fprintf(stderr, " -z serial Specify a serial number.\n");
1.107 djm 1768:
1.12 markus 1769: exit(1);
1.10 markus 1770: }
1771:
1.13 deraadt 1772: /*
1773: * Main program for key management.
1774: */
1.2 provos 1775: int
1.156 deraadt 1776: main(int argc, char **argv)
1.1 deraadt 1777: {
1.87 djm 1778: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.197 djm 1779: char out_file[MAXPATHLEN], *rr_hostname = NULL;
1.46 deraadt 1780: Key *private, *public;
1.12 markus 1781: struct passwd *pw;
1782: struct stat st;
1.177 markus 1783: int opt, type, fd;
1.189 djm 1784: u_int maxbits;
1.126 dtucker 1785: u_int32_t memory = 0, generator_wanted = 0, trials = 100;
1.107 djm 1786: int do_gen_candidates = 0, do_screen_candidates = 0;
1787: BIGNUM *start = NULL;
1.12 markus 1788: FILE *f;
1.125 avsm 1789: const char *errstr;
1.33 markus 1790:
1.12 markus 1791: extern int optind;
1792: extern char *optarg;
1.129 djm 1793:
1794: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1795: sanitise_stdfd();
1.12 markus 1796:
1.201 ! djm 1797: OpenSSL_add_all_algorithms();
1.156 deraadt 1798: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.19 markus 1799:
1.14 markus 1800: /* we need this for the home * directory. */
1.12 markus 1801: pw = getpwuid(getuid());
1802: if (!pw) {
1803: printf("You don't exist, go away!\n");
1804: exit(1);
1805: }
1.19 markus 1806: if (gethostname(hostname, sizeof(hostname)) < 0) {
1807: perror("gethostname");
1808: exit(1);
1809: }
1.14 markus 1810:
1.193 djm 1811: while ((opt = getopt(argc, argv, "degiqpclBHLhvxXyF:b:f:t:D:I:P:m:N:n:"
1.186 djm 1812: "O:C:r:g:R:T:G:M:S:s:a:V:W:z:")) != -1) {
1.12 markus 1813: switch (opt) {
1814: case 'b':
1.142 deraadt 1815: bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr);
1.125 avsm 1816: if (errstr)
1817: fatal("Bits has bad value %s (%s)",
1818: optarg, errstr);
1.12 markus 1819: break;
1.119 djm 1820: case 'F':
1821: find_host = 1;
1822: rr_hostname = optarg;
1823: break;
1824: case 'H':
1825: hash_hosts = 1;
1826: break;
1.179 djm 1827: case 'I':
1828: cert_key_id = optarg;
1829: break;
1.119 djm 1830: case 'R':
1831: delete_host = 1;
1832: rr_hostname = optarg;
1833: break;
1.182 djm 1834: case 'L':
1835: show_cert = 1;
1836: break;
1.12 markus 1837: case 'l':
1838: print_fingerprint = 1;
1839: break;
1.49 markus 1840: case 'B':
1841: print_bubblebabble = 1;
1842: break;
1.193 djm 1843: case 'm':
1844: if (strcasecmp(optarg, "RFC4716") == 0 ||
1845: strcasecmp(optarg, "ssh2") == 0) {
1846: convert_format = FMT_RFC4716;
1847: break;
1848: }
1849: if (strcasecmp(optarg, "PKCS8") == 0) {
1850: convert_format = FMT_PKCS8;
1851: break;
1852: }
1853: if (strcasecmp(optarg, "PEM") == 0) {
1854: convert_format = FMT_PEM;
1855: break;
1856: }
1857: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 1858: case 'n':
1859: cert_principals = optarg;
1860: break;
1.12 markus 1861: case 'p':
1862: change_passphrase = 1;
1863: break;
1864: case 'c':
1865: change_comment = 1;
1866: break;
1867: case 'f':
1.124 avsm 1868: if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1869: sizeof(identity_file))
1870: fatal("Identity filename too long");
1.12 markus 1871: have_identity = 1;
1872: break;
1.105 jakob 1873: case 'g':
1874: print_generic = 1;
1875: break;
1.12 markus 1876: case 'P':
1877: identity_passphrase = optarg;
1878: break;
1879: case 'N':
1880: identity_new_passphrase = optarg;
1881: break;
1.179 djm 1882: case 'O':
1.186 djm 1883: add_cert_option(optarg);
1.179 djm 1884: break;
1.12 markus 1885: case 'C':
1886: identity_comment = optarg;
1887: break;
1888: case 'q':
1889: quiet = 1;
1.20 deraadt 1890: break;
1.57 markus 1891: case 'e':
1.19 markus 1892: case 'x':
1.57 markus 1893: /* export key */
1.193 djm 1894: convert_to = 1;
1.19 markus 1895: break;
1.179 djm 1896: case 'h':
1897: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 1898: certflags_flags = 0;
1.179 djm 1899: break;
1.57 markus 1900: case 'i':
1.19 markus 1901: case 'X':
1.57 markus 1902: /* import key */
1.193 djm 1903: convert_from = 1;
1.19 markus 1904: break;
1905: case 'y':
1906: print_public = 1;
1.47 jakob 1907: break;
1.19 markus 1908: case 'd':
1.33 markus 1909: key_type_name = "dsa";
1.19 markus 1910: break;
1.179 djm 1911: case 's':
1912: ca_key_path = optarg;
1913: break;
1.33 markus 1914: case 't':
1915: key_type_name = optarg;
1916: break;
1.75 markus 1917: case 'D':
1.177 markus 1918: pkcs11provider = optarg;
1.66 markus 1919: break;
1.113 djm 1920: case 'v':
1921: if (log_level == SYSLOG_LEVEL_INFO)
1922: log_level = SYSLOG_LEVEL_DEBUG1;
1923: else {
1.117 deraadt 1924: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 1925: log_level < SYSLOG_LEVEL_DEBUG3)
1926: log_level++;
1927: }
1928: break;
1.105 jakob 1929: case 'r':
1.119 djm 1930: rr_hostname = optarg;
1.105 jakob 1931: break;
1.107 djm 1932: case 'W':
1.142 deraadt 1933: generator_wanted = (u_int32_t)strtonum(optarg, 1,
1934: UINT_MAX, &errstr);
1.124 avsm 1935: if (errstr)
1936: fatal("Desired generator has bad value: %s (%s)",
1937: optarg, errstr);
1.107 djm 1938: break;
1939: case 'a':
1.142 deraadt 1940: trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1.124 avsm 1941: if (errstr)
1942: fatal("Invalid number of trials: %s (%s)",
1943: optarg, errstr);
1.107 djm 1944: break;
1945: case 'M':
1.142 deraadt 1946: memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
1.186 djm 1947: if (errstr)
1.124 avsm 1948: fatal("Memory limit is %s: %s", errstr, optarg);
1.107 djm 1949: break;
1950: case 'G':
1951: do_gen_candidates = 1;
1.124 avsm 1952: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1953: sizeof(out_file))
1954: fatal("Output filename too long");
1.107 djm 1955: break;
1956: case 'T':
1957: do_screen_candidates = 1;
1.124 avsm 1958: if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1959: sizeof(out_file))
1960: fatal("Output filename too long");
1.107 djm 1961: break;
1962: case 'S':
1963: /* XXX - also compare length against bits */
1964: if (BN_hex2bn(&start, optarg) == 0)
1965: fatal("Invalid start point.");
1966: break;
1.179 djm 1967: case 'V':
1968: parse_cert_times(optarg);
1.186 djm 1969: break;
1970: case 'z':
1971: cert_serial = strtonum(optarg, 0, LLONG_MAX, &errstr);
1972: if (errstr)
1973: fatal("Invalid serial number: %s", errstr);
1.179 djm 1974: break;
1.12 markus 1975: case '?':
1976: default:
1977: usage();
1978: }
1979: }
1.113 djm 1980:
1981: /* reinit */
1.156 deraadt 1982: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 1983:
1.179 djm 1984: argv += optind;
1985: argc -= optind;
1986:
1987: if (ca_key_path != NULL) {
1988: if (argc < 1) {
1989: printf("Too few arguments.\n");
1990: usage();
1991: }
1992: } else if (argc > 0) {
1.12 markus 1993: printf("Too many arguments.\n");
1.87 djm 1994: usage();
1995: }
1.12 markus 1996: if (change_passphrase && change_comment) {
1997: printf("Can only have one of -p and -c.\n");
1.166 djm 1998: usage();
1999: }
2000: if (print_fingerprint && (delete_host || hash_hosts)) {
2001: printf("Cannot use -l with -D or -R.\n");
1.12 markus 2002: usage();
1.179 djm 2003: }
2004: if (ca_key_path != NULL) {
2005: if (cert_key_id == NULL)
2006: fatal("Must specify key id (-I) when certifying");
2007: do_ca_sign(pw, argc, argv);
1.12 markus 2008: }
1.182 djm 2009: if (show_cert)
2010: do_show_cert(pw);
1.119 djm 2011: if (delete_host || hash_hosts || find_host)
2012: do_known_hosts(pw, rr_hostname);
1.49 markus 2013: if (print_fingerprint || print_bubblebabble)
1.12 markus 2014: do_fingerprint(pw);
2015: if (change_passphrase)
2016: do_change_passphrase(pw);
2017: if (change_comment)
2018: do_change_comment(pw);
1.193 djm 2019: if (convert_to)
2020: do_convert_to(pw);
2021: if (convert_from)
2022: do_convert_from(pw);
1.19 markus 2023: if (print_public)
2024: do_print_public(pw);
1.119 djm 2025: if (rr_hostname != NULL) {
1.138 jakob 2026: unsigned int n = 0;
2027:
2028: if (have_identity) {
2029: n = do_print_resource_record(pw,
2030: identity_file, rr_hostname);
2031: if (n == 0) {
2032: perror(identity_file);
2033: exit(1);
2034: }
2035: exit(0);
2036: } else {
2037:
2038: n += do_print_resource_record(pw,
2039: _PATH_HOST_RSA_KEY_FILE, rr_hostname);
2040: n += do_print_resource_record(pw,
2041: _PATH_HOST_DSA_KEY_FILE, rr_hostname);
2042:
2043: if (n == 0)
2044: fatal("no keys found.");
2045: exit(0);
2046: }
1.105 jakob 2047: }
1.177 markus 2048: if (pkcs11provider != NULL)
1.197 djm 2049: do_download(pw);
1.107 djm 2050:
2051: if (do_gen_candidates) {
2052: FILE *out = fopen(out_file, "w");
1.111 djm 2053:
1.107 djm 2054: if (out == NULL) {
2055: error("Couldn't open modulus candidate file \"%s\": %s",
2056: out_file, strerror(errno));
2057: return (1);
2058: }
1.130 markus 2059: if (bits == 0)
2060: bits = DEFAULT_BITS;
1.107 djm 2061: if (gen_candidates(out, memory, bits, start) != 0)
1.131 stevesk 2062: fatal("modulus candidate generation failed");
1.107 djm 2063:
2064: return (0);
2065: }
2066:
2067: if (do_screen_candidates) {
2068: FILE *in;
2069: FILE *out = fopen(out_file, "w");
2070:
2071: if (have_identity && strcmp(identity_file, "-") != 0) {
2072: if ((in = fopen(identity_file, "r")) == NULL) {
2073: fatal("Couldn't open modulus candidate "
1.111 djm 2074: "file \"%s\": %s", identity_file,
1.107 djm 2075: strerror(errno));
2076: }
2077: } else
2078: in = stdin;
2079:
2080: if (out == NULL) {
2081: fatal("Couldn't open moduli file \"%s\": %s",
2082: out_file, strerror(errno));
2083: }
2084: if (prime_test(in, out, trials, generator_wanted) != 0)
1.131 stevesk 2085: fatal("modulus screening failed");
1.108 markus 2086: return (0);
1.75 markus 2087: }
1.12 markus 2088:
2089: arc4random_stir();
2090:
1.133 djm 2091: if (key_type_name == NULL)
2092: key_type_name = "rsa";
2093:
1.35 markus 2094: type = key_type_from_name(key_type_name);
2095: if (type == KEY_UNSPEC) {
2096: fprintf(stderr, "unknown key type %s\n", key_type_name);
2097: exit(1);
1.19 markus 2098: }
1.200 djm 2099: if (bits == 0) {
2100: if (type == KEY_DSA)
2101: bits = DEFAULT_BITS_DSA;
2102: else if (type == KEY_ECDSA)
2103: bits = DEFAULT_BITS_ECDSA;
2104: else
2105: bits = DEFAULT_BITS;
2106: }
1.189 djm 2107: maxbits = (type == KEY_DSA) ?
2108: OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS;
2109: if (bits > maxbits) {
2110: fprintf(stderr, "key bits exceeds maximum %d\n", maxbits);
2111: exit(1);
2112: }
1.134 dtucker 2113: if (type == KEY_DSA && bits != 1024)
2114: fatal("DSA keys must be 1024 bits");
1.200 djm 2115: else if (type == KEY_ECDSA && key_ecdsa_bits_to_nid(bits) == -1)
2116: fatal("Invalid ECDSA key length - valid lengths are "
2117: "256, 384 or 521 bits");
1.33 markus 2118: if (!quiet)
1.35 markus 2119: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 2120: private = key_generate(type, bits);
2121: if (private == NULL) {
1.173 tobias 2122: fprintf(stderr, "key_generate failed\n");
1.33 markus 2123: exit(1);
2124: }
2125: public = key_from_private(private);
1.12 markus 2126:
2127: if (!have_identity)
2128: ask_filename(pw, "Enter file in which to save the key");
2129:
1.132 djm 2130: /* Create ~/.ssh directory if it doesn't already exist. */
1.188 djm 2131: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
2132: pw->pw_dir, _PATH_SSH_USER_DIR);
2133: if (strstr(identity_file, dotsshdir) != NULL) {
2134: if (stat(dotsshdir, &st) < 0) {
2135: if (errno != ENOENT) {
2136: error("Could not stat %s: %s", dotsshdir,
2137: strerror(errno));
2138: } else if (mkdir(dotsshdir, 0700) < 0) {
2139: error("Could not create directory '%s': %s",
2140: dotsshdir, strerror(errno));
2141: } else if (!quiet)
2142: printf("Created directory '%s'.\n", dotsshdir);
2143: }
1.12 markus 2144: }
2145: /* If the file already exists, ask the user to confirm. */
2146: if (stat(identity_file, &st) >= 0) {
2147: char yesno[3];
2148: printf("%s already exists.\n", identity_file);
2149: printf("Overwrite (y/n)? ");
2150: fflush(stdout);
2151: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
2152: exit(1);
2153: if (yesno[0] != 'y' && yesno[0] != 'Y')
2154: exit(1);
2155: }
2156: /* Ask for a passphrase (twice). */
2157: if (identity_passphrase)
2158: passphrase1 = xstrdup(identity_passphrase);
2159: else if (identity_new_passphrase)
2160: passphrase1 = xstrdup(identity_new_passphrase);
2161: else {
2162: passphrase_again:
2163: passphrase1 =
1.65 markus 2164: read_passphrase("Enter passphrase (empty for no "
2165: "passphrase): ", RP_ALLOW_STDIN);
2166: passphrase2 = read_passphrase("Enter same passphrase again: ",
2167: RP_ALLOW_STDIN);
1.12 markus 2168: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 2169: /*
2170: * The passphrases do not match. Clear them and
2171: * retry.
2172: */
1.12 markus 2173: memset(passphrase1, 0, strlen(passphrase1));
2174: memset(passphrase2, 0, strlen(passphrase2));
2175: xfree(passphrase1);
2176: xfree(passphrase2);
2177: printf("Passphrases do not match. Try again.\n");
2178: goto passphrase_again;
2179: }
2180: /* Clear the other copy of the passphrase. */
2181: memset(passphrase2, 0, strlen(passphrase2));
2182: xfree(passphrase2);
2183: }
2184:
2185: if (identity_comment) {
2186: strlcpy(comment, identity_comment, sizeof(comment));
2187: } else {
1.172 stevesk 2188: /* Create default comment field for the passphrase. */
1.12 markus 2189: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
2190: }
2191:
2192: /* Save the key with the given passphrase and comment. */
1.52 markus 2193: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 2194: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 2195: memset(passphrase1, 0, strlen(passphrase1));
2196: xfree(passphrase1);
2197: exit(1);
2198: }
2199: /* Clear the passphrase. */
2200: memset(passphrase1, 0, strlen(passphrase1));
2201: xfree(passphrase1);
2202:
2203: /* Clear the private key and the random number generator. */
1.33 markus 2204: key_free(private);
1.12 markus 2205: arc4random_stir();
2206:
2207: if (!quiet)
2208: printf("Your identification has been saved in %s.\n", identity_file);
2209:
2210: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 2211: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
2212: if (fd == -1) {
1.12 markus 2213: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 2214: exit(1);
2215: }
2216: f = fdopen(fd, "w");
2217: if (f == NULL) {
1.173 tobias 2218: printf("fdopen %s failed\n", identity_file);
1.12 markus 2219: exit(1);
2220: }
1.19 markus 2221: if (!key_write(public, f))
1.173 tobias 2222: fprintf(stderr, "write key failed\n");
1.19 markus 2223: fprintf(f, " %s\n", comment);
1.12 markus 2224: fclose(f);
2225:
2226: if (!quiet) {
1.50 markus 2227: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.167 grunk 2228: char *ra = key_fingerprint(public, SSH_FP_MD5,
2229: SSH_FP_RANDOMART);
1.19 markus 2230: printf("Your public key has been saved in %s.\n",
2231: identity_file);
1.12 markus 2232: printf("The key fingerprint is:\n");
1.50 markus 2233: printf("%s %s\n", fp, comment);
1.167 grunk 2234: printf("The key's randomart image is:\n");
2235: printf("%s\n", ra);
2236: xfree(ra);
1.50 markus 2237: xfree(fp);
1.12 markus 2238: }
1.19 markus 2239:
2240: key_free(public);
1.12 markus 2241: exit(0);
1.1 deraadt 2242: }
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