1 /* $OpenBSD: ssh-keygen.c,v 1.299 2017/03/10 04:26:06 djm Exp $ */
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * Identity and host key generation and maintenance.
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".
17 #include <sys/types.h>
18 #include <sys/socket.h>
22 #include <openssl/evp.h>
23 #include <openssl/pem.h>
24 #include "openbsd-compat/openssl-compat.h"
48 #include "pathnames.h"
57 #include "ssh-pkcs11.h"
64 # define DEFAULT_KEY_TYPE_NAME "rsa"
66 # define DEFAULT_KEY_TYPE_NAME "ed25519"
69 /* Number of bits in the RSA/DSA key. This value can be set on the command line. */
70 #define DEFAULT_BITS 2048
71 #define DEFAULT_BITS_DSA 1024
72 #define DEFAULT_BITS_ECDSA 256
76 * Flag indicating that we just want to change the passphrase. This can be
77 * set on the command line.
79 int change_passphrase = 0;
82 * Flag indicating that we just want to change the comment. This can be set
83 * on the command line.
85 int change_comment = 0;
89 int log_level = SYSLOG_LEVEL_INFO;
91 /* Flag indicating that we want to hash a known_hosts file */
93 /* Flag indicating that we want lookup a host in known_hosts file */
95 /* Flag indicating that we want to delete a host from a known_hosts file */
98 /* Flag indicating that we want to show the contents of a certificate */
101 /* Flag indicating that we just want to see the key fingerprint */
102 int print_fingerprint = 0;
103 int print_bubblebabble = 0;
105 /* Hash algorithm to use for fingerprints. */
106 int fingerprint_hash = SSH_FP_HASH_DEFAULT;
108 /* The identity file name, given on the command line or entered by the user. */
109 char identity_file[1024];
110 int have_identity = 0;
112 /* This is set to the passphrase if given on the command line. */
113 char *identity_passphrase = NULL;
115 /* This is set to the new passphrase if given on the command line. */
116 char *identity_new_passphrase = NULL;
118 /* This is set to the new comment if given on the command line. */
119 char *identity_comment = NULL;
121 /* Path to CA key when certifying keys. */
122 char *ca_key_path = NULL;
124 /* Certificate serial number */
125 unsigned long long cert_serial = 0;
127 /* Key type when certifying */
128 u_int cert_key_type = SSH2_CERT_TYPE_USER;
130 /* "key ID" of signed key */
131 char *cert_key_id = NULL;
133 /* Comma-separated list of principal names for certifying keys */
134 char *cert_principals = NULL;
136 /* Validity period for certificates */
137 u_int64_t cert_valid_from = 0;
138 u_int64_t cert_valid_to = ~0ULL;
140 /* Certificate options */
141 #define CERTOPT_X_FWD (1)
142 #define CERTOPT_AGENT_FWD (1<<1)
143 #define CERTOPT_PORT_FWD (1<<2)
144 #define CERTOPT_PTY (1<<3)
145 #define CERTOPT_USER_RC (1<<4)
146 #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
147 CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
148 u_int32_t certflags_flags = CERTOPT_DEFAULT;
149 char *certflags_command = NULL;
150 char *certflags_src_addr = NULL;
152 /* Conversion to/from various formats */
154 int convert_from = 0;
159 } convert_format = FMT_RFC4716;
160 int print_public = 0;
161 int print_generic = 0;
163 char *key_type_name = NULL;
165 /* Load key from this PKCS#11 provider */
166 char *pkcs11provider = NULL;
168 /* Use new OpenSSH private key format when writing SSH2 keys instead of PEM */
169 int use_new_format = 0;
171 /* Cipher for new-format private keys */
172 char *new_format_cipher = NULL;
175 * Number of KDF rounds to derive new format keys /
176 * number of primality trials when screening moduli.
181 extern char *__progname;
183 char hostname[NI_MAXHOST];
187 int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
188 int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
193 type_bits_valid(int type, const char *name, u_int32_t *bitsp)
199 if (type == KEY_UNSPEC)
200 fatal("unknown key type %s", key_type_name);
204 *bitsp = DEFAULT_BITS_DSA;
205 else if (type == KEY_ECDSA) {
207 (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
208 *bitsp = sshkey_curve_nid_to_bits(nid);
210 *bitsp = DEFAULT_BITS_ECDSA;
213 *bitsp = DEFAULT_BITS;
216 maxbits = (type == KEY_DSA) ?
217 OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS;
218 if (*bitsp > maxbits)
219 fatal("key bits exceeds maximum %d", maxbits);
220 if (type == KEY_DSA && *bitsp != 1024)
221 fatal("DSA keys must be 1024 bits");
222 else if (type != KEY_ECDSA && type != KEY_ED25519 && *bitsp < 1024)
223 fatal("Key must at least be 1024 bits");
224 else if (type == KEY_ECDSA && sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
225 fatal("Invalid ECDSA key length - valid lengths are "
226 "256, 384 or 521 bits");
231 ask_filename(struct passwd *pw, const char *prompt)
236 if (key_type_name == NULL)
237 name = _PATH_SSH_CLIENT_ID_RSA;
239 switch (sshkey_type_from_name(key_type_name)) {
241 name = _PATH_SSH_CLIENT_IDENTITY;
245 name = _PATH_SSH_CLIENT_ID_DSA;
247 #ifdef OPENSSL_HAS_ECC
250 name = _PATH_SSH_CLIENT_ID_ECDSA;
255 name = _PATH_SSH_CLIENT_ID_RSA;
258 case KEY_ED25519_CERT:
259 name = _PATH_SSH_CLIENT_ID_ED25519;
262 fatal("bad key type");
265 snprintf(identity_file, sizeof(identity_file),
266 "%s/%s", pw->pw_dir, name);
267 printf("%s (%s): ", prompt, identity_file);
269 if (fgets(buf, sizeof(buf), stdin) == NULL)
271 buf[strcspn(buf, "\n")] = '\0';
272 if (strcmp(buf, "") != 0)
273 strlcpy(identity_file, buf, sizeof(identity_file));
277 static struct sshkey *
278 load_identity(char *filename)
284 if ((r = sshkey_load_private(filename, "", &prv, NULL)) == 0)
286 if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
287 fatal("Load key \"%s\": %s", filename, ssh_err(r));
288 if (identity_passphrase)
289 pass = xstrdup(identity_passphrase);
291 pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
292 r = sshkey_load_private(filename, pass, &prv, NULL);
293 explicit_bzero(pass, strlen(pass));
296 fatal("Load key \"%s\": %s", filename, ssh_err(r));
300 #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
301 #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
302 #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
303 #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
307 do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
314 if (k->type == KEY_RSA1)
315 fatal("version 1 keys are not supported");
316 if ((r = sshkey_to_blob(k, &blob, &len)) != 0)
317 fatal("key_to_blob failed: %s", ssh_err(r));
318 /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
319 snprintf(comment, sizeof(comment),
320 "%u-bit %s, converted by %s@%s from OpenSSH",
321 sshkey_size(k), sshkey_type(k),
322 pw->pw_name, hostname);
324 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
325 fprintf(stdout, "Comment: \"%s\"\n", comment);
326 dump_base64(stdout, blob, len);
327 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
334 do_convert_to_pkcs8(struct sshkey *k)
336 switch (sshkey_type_plain(k->type)) {
339 if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
340 fatal("PEM_write_RSA_PUBKEY failed");
343 if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
344 fatal("PEM_write_DSA_PUBKEY failed");
346 #ifdef OPENSSL_HAS_ECC
348 if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
349 fatal("PEM_write_EC_PUBKEY failed");
353 fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
359 do_convert_to_pem(struct sshkey *k)
361 switch (sshkey_type_plain(k->type)) {
364 if (!PEM_write_RSAPublicKey(stdout, k->rsa))
365 fatal("PEM_write_RSAPublicKey failed");
367 #if notyet /* OpenSSH 0.9.8 lacks this function */
369 if (!PEM_write_DSAPublicKey(stdout, k->dsa))
370 fatal("PEM_write_DSAPublicKey failed");
375 fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
381 do_convert_to(struct passwd *pw)
388 ask_filename(pw, "Enter file in which the key is");
389 if (stat(identity_file, &st) < 0)
390 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
391 if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
392 k = load_identity(identity_file);
393 switch (convert_format) {
395 do_convert_to_ssh2(pw, k);
398 do_convert_to_pkcs8(k);
401 do_convert_to_pem(k);
404 fatal("%s: unknown key format %d", __func__, convert_format);
410 * This is almost exactly the bignum1 encoding, but with 32 bit for length
414 buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
416 u_int bytes, bignum_bits;
419 if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
420 fatal("%s: buffer error: %s", __func__, ssh_err(r));
421 bytes = (bignum_bits + 7) / 8;
422 if (sshbuf_len(b) < bytes)
423 fatal("%s: input buffer too small: need %d have %zu",
424 __func__, bytes, sshbuf_len(b));
425 if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
426 fatal("%s: BN_bin2bn failed", __func__);
427 if ((r = sshbuf_consume(b, bytes)) != 0)
428 fatal("%s: buffer error: %s", __func__, ssh_err(r));
431 static struct sshkey *
432 do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
435 struct sshkey *key = NULL;
437 u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
439 u_int magic, i1, i2, i3, i4;
443 if ((b = sshbuf_from(blob, blen)) == NULL)
444 fatal("%s: sshbuf_from failed", __func__);
445 if ((r = sshbuf_get_u32(b, &magic)) != 0)
446 fatal("%s: buffer error: %s", __func__, ssh_err(r));
448 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
449 error("bad magic 0x%x != 0x%x", magic,
450 SSH_COM_PRIVATE_KEY_MAGIC);
454 if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
455 (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
456 (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
457 (r = sshbuf_get_u32(b, &i2)) != 0 ||
458 (r = sshbuf_get_u32(b, &i3)) != 0 ||
459 (r = sshbuf_get_u32(b, &i4)) != 0)
460 fatal("%s: buffer error: %s", __func__, ssh_err(r));
461 debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
462 if (strcmp(cipher, "none") != 0) {
463 error("unsupported cipher %s", cipher);
471 if (strstr(type, "dsa")) {
473 } else if (strstr(type, "rsa")) {
480 if ((key = sshkey_new_private(ktype)) == NULL)
481 fatal("key_new_private failed");
486 buffer_get_bignum_bits(b, key->dsa->p);
487 buffer_get_bignum_bits(b, key->dsa->g);
488 buffer_get_bignum_bits(b, key->dsa->q);
489 buffer_get_bignum_bits(b, key->dsa->pub_key);
490 buffer_get_bignum_bits(b, key->dsa->priv_key);
493 if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
494 (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
495 (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
496 fatal("%s: buffer error: %s", __func__, ssh_err(r));
507 if (!BN_set_word(key->rsa->e, e)) {
512 buffer_get_bignum_bits(b, key->rsa->d);
513 buffer_get_bignum_bits(b, key->rsa->n);
514 buffer_get_bignum_bits(b, key->rsa->iqmp);
515 buffer_get_bignum_bits(b, key->rsa->q);
516 buffer_get_bignum_bits(b, key->rsa->p);
517 if ((r = rsa_generate_additional_parameters(key->rsa)) != 0)
518 fatal("generate RSA parameters failed: %s", ssh_err(r));
521 rlen = sshbuf_len(b);
523 error("do_convert_private_ssh2_from_blob: "
524 "remaining bytes in key blob %d", rlen);
528 if (sshkey_sign(key, &sig, &slen, data, sizeof(data), NULL, 0) != 0 ||
529 sshkey_verify(key, sig, slen, data, sizeof(data), 0) != 0) {
539 get_line(FILE *fp, char *line, size_t len)
545 while ((c = fgetc(fp)) != EOF) {
547 fatal("input line too long.");
551 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
552 fatal("unget: %s", strerror(errno));
565 do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
567 int r, blen, escaped = 0;
574 if ((fp = fopen(identity_file, "r")) == NULL)
575 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
577 while ((blen = get_line(fp, line, sizeof(line))) != -1) {
578 if (blen > 0 && line[blen - 1] == '\\')
580 if (strncmp(line, "----", 4) == 0 ||
581 strstr(line, ": ") != NULL) {
582 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
584 if (strstr(line, " END ") != NULL) {
587 /* fprintf(stderr, "ignore: %s", line); */
592 /* fprintf(stderr, "escaped: %s", line); */
595 strlcat(encoded, line, sizeof(encoded));
597 len = strlen(encoded);
598 if (((len % 4) == 3) &&
599 (encoded[len-1] == '=') &&
600 (encoded[len-2] == '=') &&
601 (encoded[len-3] == '='))
602 encoded[len-3] = '\0';
603 blen = uudecode(encoded, blob, sizeof(blob));
605 fatal("uudecode failed.");
607 *k = do_convert_private_ssh2_from_blob(blob, blen);
608 else if ((r = sshkey_from_blob(blob, blen, k)) != 0)
609 fatal("decode blob failed: %s", ssh_err(r));
614 do_convert_from_pkcs8(struct sshkey **k, int *private)
619 if ((fp = fopen(identity_file, "r")) == NULL)
620 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
621 if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
622 fatal("%s: %s is not a recognised public key format", __func__,
626 switch (EVP_PKEY_type(pubkey->type)) {
628 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
629 fatal("sshkey_new failed");
630 (*k)->type = KEY_RSA;
631 (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
634 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
635 fatal("sshkey_new failed");
636 (*k)->type = KEY_DSA;
637 (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
639 #ifdef OPENSSL_HAS_ECC
641 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
642 fatal("sshkey_new failed");
643 (*k)->type = KEY_ECDSA;
644 (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
645 (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
649 fatal("%s: unsupported pubkey type %d", __func__,
650 EVP_PKEY_type(pubkey->type));
652 EVP_PKEY_free(pubkey);
657 do_convert_from_pem(struct sshkey **k, int *private)
665 if ((fp = fopen(identity_file, "r")) == NULL)
666 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
667 if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
668 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
669 fatal("sshkey_new failed");
670 (*k)->type = KEY_RSA;
675 #if notyet /* OpenSSH 0.9.8 lacks this function */
677 if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
678 if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
679 fatal("sshkey_new failed");
680 (*k)->type = KEY_DSA;
687 fatal("%s: unrecognised raw private key format", __func__);
691 do_convert_from(struct passwd *pw)
693 struct sshkey *k = NULL;
694 int r, private = 0, ok = 0;
698 ask_filename(pw, "Enter file in which the key is");
699 if (stat(identity_file, &st) < 0)
700 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
702 switch (convert_format) {
704 do_convert_from_ssh2(pw, &k, &private);
707 do_convert_from_pkcs8(&k, &private);
710 do_convert_from_pem(&k, &private);
713 fatal("%s: unknown key format %d", __func__, convert_format);
717 if ((r = sshkey_write(k, stdout)) == 0)
720 fprintf(stdout, "\n");
724 ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
725 NULL, 0, NULL, NULL);
727 #ifdef OPENSSL_HAS_ECC
729 ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
730 NULL, 0, NULL, NULL);
734 ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
735 NULL, 0, NULL, NULL);
738 fatal("%s: unsupported key type %s", __func__,
744 fatal("key write failed");
751 do_print_public(struct passwd *pw)
758 ask_filename(pw, "Enter file in which the key is");
759 if (stat(identity_file, &st) < 0)
760 fatal("%s: %s", identity_file, strerror(errno));
761 prv = load_identity(identity_file);
762 if ((r = sshkey_write(prv, stdout)) != 0)
763 error("key_write failed: %s", ssh_err(r));
765 fprintf(stdout, "\n");
770 do_download(struct passwd *pw)
773 struct sshkey **keys = NULL;
775 enum sshkey_fp_rep rep;
779 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
780 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
783 nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
785 fatal("cannot read public key from pkcs11");
786 for (i = 0; i < nkeys; i++) {
787 if (print_fingerprint) {
788 fp = sshkey_fingerprint(keys[i], fptype, rep);
789 ra = sshkey_fingerprint(keys[i], fingerprint_hash,
791 if (fp == NULL || ra == NULL)
792 fatal("%s: sshkey_fingerprint fail", __func__);
793 printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
794 fp, sshkey_type(keys[i]));
795 if (log_level >= SYSLOG_LEVEL_VERBOSE)
800 (void) sshkey_write(keys[i], stdout); /* XXX check */
801 fprintf(stdout, "\n");
803 sshkey_free(keys[i]);
809 fatal("no pkcs11 support");
810 #endif /* ENABLE_PKCS11 */
813 static struct sshkey *
814 try_read_key(char **cpp)
819 if ((ret = sshkey_new(KEY_RSA1)) == NULL)
820 fatal("sshkey_new failed");
822 if ((r = sshkey_read(ret, cpp)) == 0)
826 if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
827 fatal("sshkey_new failed");
828 if ((r = sshkey_read(ret, cpp)) == 0)
836 fingerprint_one_key(const struct sshkey *public, const char *comment)
838 char *fp = NULL, *ra = NULL;
839 enum sshkey_fp_rep rep;
842 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
843 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
844 fp = sshkey_fingerprint(public, fptype, rep);
845 ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
846 if (fp == NULL || ra == NULL)
847 fatal("%s: sshkey_fingerprint failed", __func__);
848 mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
849 comment ? comment : "no comment", sshkey_type(public));
850 if (log_level >= SYSLOG_LEVEL_VERBOSE)
857 fingerprint_private(const char *path)
860 char *comment = NULL;
861 struct sshkey *public = NULL;
864 if (stat(identity_file, &st) < 0)
865 fatal("%s: %s", path, strerror(errno));
866 if ((r = sshkey_load_public(path, &public, &comment)) != 0) {
867 debug("load public \"%s\": %s", path, ssh_err(r));
868 if ((r = sshkey_load_private(path, NULL,
869 &public, &comment)) != 0) {
870 debug("load private \"%s\": %s", path, ssh_err(r));
871 fatal("%s is not a key file.", path);
875 fingerprint_one_key(public, comment);
881 do_fingerprint(struct passwd *pw)
884 struct sshkey *public = NULL;
885 char *comment = NULL, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES];
891 ask_filename(pw, "Enter file in which the key is");
892 path = identity_file;
894 if (strcmp(identity_file, "-") == 0) {
897 } else if ((f = fopen(path, "r")) == NULL)
898 fatal("%s: %s: %s", __progname, path, strerror(errno));
900 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) {
902 cp[strcspn(cp, "\n")] = '\0';
903 /* Trim leading space and comments */
904 cp = line + strspn(line, " \t");
905 if (*cp == '#' || *cp == '\0')
909 * Input may be plain keys, private keys, authorized_keys
914 * Try private keys first. Assume a key is private if
915 * "SSH PRIVATE KEY" appears on the first line and we're
916 * not reading from stdin (XXX support private keys on stdin).
918 if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
919 strstr(cp, "PRIVATE KEY") != NULL) {
921 fingerprint_private(path);
926 * If it's not a private key, then this must be prepared to
927 * accept a public key prefixed with a hostname or options.
928 * Try a bare key first, otherwise skip the leading stuff.
930 if ((public = try_read_key(&cp)) == NULL) {
931 i = strtol(cp, &ep, 10);
932 if (i == 0 || ep == NULL ||
933 (*ep != ' ' && *ep != '\t')) {
937 for (; *cp && (quoted || (*cp != ' ' &&
938 *cp != '\t')); cp++) {
939 if (*cp == '\\' && cp[1] == '"')
940 cp++; /* Skip both */
949 /* Retry after parsing leading hostname/key options */
950 if (public == NULL && (public = try_read_key(&cp)) == NULL) {
951 debug("%s:%lu: not a public key", path, lnum);
955 /* Find trailing comment, if any */
956 for (; *cp == ' ' || *cp == '\t'; cp++)
958 if (*cp != '\0' && *cp != '#')
961 fingerprint_one_key(public, comment);
963 invalid = 0; /* One good key in the file is sufficient */
968 fatal("%s is not a public key file.", path);
973 do_gen_all_hostkeys(struct passwd *pw)
977 char *key_type_display;
982 { "rsa1", "RSA1", _PATH_HOST_KEY_FILE },
983 #endif /* WITH_SSH1 */
984 { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
985 { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE },
986 #ifdef OPENSSL_HAS_ECC
987 { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
988 #endif /* OPENSSL_HAS_ECC */
989 #endif /* WITH_OPENSSL */
990 { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
996 struct sshkey *private, *public;
1001 for (i = 0; key_types[i].key_type; i++) {
1002 if (stat(key_types[i].path, &st) == 0)
1004 if (errno != ENOENT) {
1005 error("Could not stat %s: %s", key_types[i].path,
1013 printf("%s: generating new host keys: ", __progname);
1015 printf("%s ", key_types[i].key_type_display);
1017 type = sshkey_type_from_name(key_types[i].key_type);
1018 strlcpy(identity_file, key_types[i].path, sizeof(identity_file));
1020 type_bits_valid(type, NULL, &bits);
1021 if ((r = sshkey_generate(type, bits, &private)) != 0) {
1022 error("key_generate failed: %s", ssh_err(r));
1026 if ((r = sshkey_from_private(private, &public)) != 0)
1027 fatal("sshkey_from_private failed: %s", ssh_err(r));
1028 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1030 if ((r = sshkey_save_private(private, identity_file, "",
1031 comment, use_new_format, new_format_cipher, rounds)) != 0) {
1032 error("Saving key \"%s\" failed: %s",
1033 identity_file, ssh_err(r));
1034 sshkey_free(private);
1035 sshkey_free(public);
1039 sshkey_free(private);
1040 strlcat(identity_file, ".pub", sizeof(identity_file));
1041 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1043 error("Could not save your public key in %s",
1045 sshkey_free(public);
1049 f = fdopen(fd, "w");
1051 error("fdopen %s failed", identity_file);
1053 sshkey_free(public);
1057 if ((r = sshkey_write(public, f)) != 0) {
1058 error("write key failed: %s", ssh_err(r));
1060 sshkey_free(public);
1064 fprintf(f, " %s\n", comment);
1066 sshkey_free(public);
1073 struct known_hosts_ctx {
1074 const char *host; /* Hostname searched for in find/delete case */
1075 FILE *out; /* Output file, stdout for find_hosts case */
1076 int has_unhashed; /* When hashing, original had unhashed hosts */
1077 int found_key; /* For find/delete, host was found */
1078 int invalid; /* File contained invalid items; don't delete */
1082 known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1084 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1085 char *hashed, *cp, *hosts, *ohosts;
1086 int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1087 int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1089 switch (l->status) {
1091 case HKF_STATUS_MATCHED:
1093 * Don't hash hosts already already hashed, with wildcard
1094 * characters or a CA/revocation marker.
1096 if (was_hashed || has_wild || l->marker != MRK_NONE) {
1097 fprintf(ctx->out, "%s\n", l->line);
1098 if (has_wild && !find_host) {
1099 logit("%s:%lu: ignoring host name "
1100 "with wildcard: %.64s", l->path,
1101 l->linenum, l->hosts);
1106 * Split any comma-separated hostnames from the host list,
1107 * hash and store separately.
1109 ohosts = hosts = xstrdup(l->hosts);
1110 while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1112 if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1113 fatal("hash_host failed");
1114 fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1115 ctx->has_unhashed = 1;
1119 case HKF_STATUS_INVALID:
1120 /* Retain invalid lines, but mark file as invalid. */
1122 logit("%s:%lu: invalid line", l->path, l->linenum);
1125 fprintf(ctx->out, "%s\n", l->line);
1133 known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1135 struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1136 enum sshkey_fp_rep rep;
1140 fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1141 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1143 if (l->status == HKF_STATUS_MATCHED) {
1145 if (l->marker != MRK_NONE) {
1146 /* Don't remove CA and revocation lines */
1147 fprintf(ctx->out, "%s\n", l->line);
1150 * Hostname matches and has no CA/revoke
1151 * marker, delete it by *not* writing the
1156 printf("# Host %s found: line %lu\n",
1157 ctx->host, l->linenum);
1160 } else if (find_host) {
1163 printf("# Host %s found: line %lu %s\n",
1165 l->linenum, l->marker == MRK_CA ? "CA" :
1166 (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1169 known_hosts_hash(l, ctx);
1170 else if (print_fingerprint) {
1171 fp = sshkey_fingerprint(l->key, fptype, rep);
1172 mprintf("%s %s %s %s\n", ctx->host,
1173 sshkey_type(l->key), fp, l->comment);
1176 fprintf(ctx->out, "%s\n", l->line);
1179 } else if (delete_host) {
1180 /* Retain non-matching hosts when deleting */
1181 if (l->status == HKF_STATUS_INVALID) {
1183 logit("%s:%lu: invalid line", l->path, l->linenum);
1185 fprintf(ctx->out, "%s\n", l->line);
1191 do_known_hosts(struct passwd *pw, const char *name)
1193 char *cp, tmp[PATH_MAX], old[PATH_MAX];
1194 int r, fd, oerrno, inplace = 0;
1195 struct known_hosts_ctx ctx;
1196 u_int foreach_options;
1198 if (!have_identity) {
1199 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1200 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1201 sizeof(identity_file))
1202 fatal("Specified known hosts path too long");
1207 memset(&ctx, 0, sizeof(ctx));
1212 * Find hosts goes to stdout, hash and deletions happen in-place
1213 * A corner case is ssh-keygen -HF foo, which should go to stdout
1215 if (!find_host && (hash_hosts || delete_host)) {
1216 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1217 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1218 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1219 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1220 fatal("known_hosts path too long");
1222 if ((fd = mkstemp(tmp)) == -1)
1223 fatal("mkstemp: %s", strerror(errno));
1224 if ((ctx.out = fdopen(fd, "w")) == NULL) {
1227 fatal("fdopen: %s", strerror(oerrno));
1232 /* XXX support identity_file == "-" for stdin */
1233 foreach_options = find_host ? HKF_WANT_MATCH : 0;
1234 foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1235 if ((r = hostkeys_foreach(identity_file,
1236 hash_hosts ? known_hosts_hash : known_hosts_find_delete, &ctx,
1237 name, NULL, foreach_options)) != 0) {
1240 fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r));
1247 error("%s is not a valid known_hosts file.", identity_file);
1249 error("Not replacing existing known_hosts "
1250 "file because of errors");
1254 } else if (delete_host && !ctx.found_key) {
1255 logit("Host %s not found in %s", name, identity_file);
1258 } else if (inplace) {
1259 /* Backup existing file */
1260 if (unlink(old) == -1 && errno != ENOENT)
1261 fatal("unlink %.100s: %s", old, strerror(errno));
1262 if (link(identity_file, old) == -1)
1263 fatal("link %.100s to %.100s: %s", identity_file, old,
1265 /* Move new one into place */
1266 if (rename(tmp, identity_file) == -1) {
1267 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1274 printf("%s updated.\n", identity_file);
1275 printf("Original contents retained as %s\n", old);
1276 if (ctx.has_unhashed) {
1277 logit("WARNING: %s contains unhashed entries", old);
1278 logit("Delete this file to ensure privacy "
1283 exit (find_host && !ctx.found_key);
1287 * Perform changing a passphrase. The argument is the passwd structure
1288 * for the current user.
1291 do_change_passphrase(struct passwd *pw)
1294 char *old_passphrase, *passphrase1, *passphrase2;
1296 struct sshkey *private;
1300 ask_filename(pw, "Enter file in which the key is");
1301 if (stat(identity_file, &st) < 0)
1302 fatal("%s: %s", identity_file, strerror(errno));
1303 /* Try to load the file with empty passphrase. */
1304 r = sshkey_load_private(identity_file, "", &private, &comment);
1305 if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1306 if (identity_passphrase)
1307 old_passphrase = xstrdup(identity_passphrase);
1310 read_passphrase("Enter old passphrase: ",
1312 r = sshkey_load_private(identity_file, old_passphrase,
1313 &private, &comment);
1314 explicit_bzero(old_passphrase, strlen(old_passphrase));
1315 free(old_passphrase);
1318 } else if (r != 0) {
1320 fatal("Failed to load key %s: %s", identity_file, ssh_err(r));
1323 mprintf("Key has comment '%s'\n", comment);
1325 /* Ask the new passphrase (twice). */
1326 if (identity_new_passphrase) {
1327 passphrase1 = xstrdup(identity_new_passphrase);
1331 read_passphrase("Enter new passphrase (empty for no "
1332 "passphrase): ", RP_ALLOW_STDIN);
1333 passphrase2 = read_passphrase("Enter same passphrase again: ",
1336 /* Verify that they are the same. */
1337 if (strcmp(passphrase1, passphrase2) != 0) {
1338 explicit_bzero(passphrase1, strlen(passphrase1));
1339 explicit_bzero(passphrase2, strlen(passphrase2));
1342 printf("Pass phrases do not match. Try again.\n");
1345 /* Destroy the other copy. */
1346 explicit_bzero(passphrase2, strlen(passphrase2));
1350 /* Save the file using the new passphrase. */
1351 if ((r = sshkey_save_private(private, identity_file, passphrase1,
1352 comment, use_new_format, new_format_cipher, rounds)) != 0) {
1353 error("Saving key \"%s\" failed: %s.",
1354 identity_file, ssh_err(r));
1355 explicit_bzero(passphrase1, strlen(passphrase1));
1357 sshkey_free(private);
1361 /* Destroy the passphrase and the copy of the key in memory. */
1362 explicit_bzero(passphrase1, strlen(passphrase1));
1364 sshkey_free(private); /* Destroys contents */
1367 printf("Your identification has been saved with the new passphrase.\n");
1372 * Print the SSHFP RR.
1375 do_print_resource_record(struct passwd *pw, char *fname, char *hname)
1377 struct sshkey *public;
1378 char *comment = NULL;
1383 fatal("%s: no filename", __func__);
1384 if (stat(fname, &st) < 0) {
1385 if (errno == ENOENT)
1387 fatal("%s: %s", fname, strerror(errno));
1389 if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1390 fatal("Failed to read v2 public key from \"%s\": %s.",
1392 export_dns_rr(hname, public, stdout, print_generic);
1393 sshkey_free(public);
1399 * Change the comment of a private key file.
1402 do_change_comment(struct passwd *pw)
1404 char new_comment[1024], *comment, *passphrase;
1405 struct sshkey *private;
1406 struct sshkey *public;
1412 ask_filename(pw, "Enter file in which the key is");
1413 if (stat(identity_file, &st) < 0)
1414 fatal("%s: %s", identity_file, strerror(errno));
1415 if ((r = sshkey_load_private(identity_file, "",
1416 &private, &comment)) == 0)
1417 passphrase = xstrdup("");
1418 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1419 fatal("Cannot load private key \"%s\": %s.",
1420 identity_file, ssh_err(r));
1422 if (identity_passphrase)
1423 passphrase = xstrdup(identity_passphrase);
1424 else if (identity_new_passphrase)
1425 passphrase = xstrdup(identity_new_passphrase);
1427 passphrase = read_passphrase("Enter passphrase: ",
1429 /* Try to load using the passphrase. */
1430 if ((r = sshkey_load_private(identity_file, passphrase,
1431 &private, &comment)) != 0) {
1432 explicit_bzero(passphrase, strlen(passphrase));
1434 fatal("Cannot load private key \"%s\": %s.",
1435 identity_file, ssh_err(r));
1439 if (private->type != KEY_RSA1 && private->type != KEY_ED25519 &&
1441 error("Comments are only supported for RSA1 or keys stored in "
1442 "the new format (-o).");
1443 explicit_bzero(passphrase, strlen(passphrase));
1444 sshkey_free(private);
1448 printf("Key now has comment '%s'\n", comment);
1450 printf("Key now has no comment\n");
1452 if (identity_comment) {
1453 strlcpy(new_comment, identity_comment, sizeof(new_comment));
1455 printf("Enter new comment: ");
1457 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1458 explicit_bzero(passphrase, strlen(passphrase));
1459 sshkey_free(private);
1462 new_comment[strcspn(new_comment, "\n")] = '\0';
1465 /* Save the file using the new passphrase. */
1466 if ((r = sshkey_save_private(private, identity_file, passphrase,
1467 new_comment, use_new_format, new_format_cipher, rounds)) != 0) {
1468 error("Saving key \"%s\" failed: %s",
1469 identity_file, ssh_err(r));
1470 explicit_bzero(passphrase, strlen(passphrase));
1472 sshkey_free(private);
1476 explicit_bzero(passphrase, strlen(passphrase));
1478 if ((r = sshkey_from_private(private, &public)) != 0)
1479 fatal("key_from_private failed: %s", ssh_err(r));
1480 sshkey_free(private);
1482 strlcat(identity_file, ".pub", sizeof(identity_file));
1483 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1485 fatal("Could not save your public key in %s", identity_file);
1486 f = fdopen(fd, "w");
1488 fatal("fdopen %s failed: %s", identity_file, strerror(errno));
1489 if ((r = sshkey_write(public, f)) != 0)
1490 fatal("write key failed: %s", ssh_err(r));
1491 sshkey_free(public);
1492 fprintf(f, " %s\n", new_comment);
1497 printf("The comment in your key file has been changed.\n");
1502 add_flag_option(struct sshbuf *c, const char *name)
1506 debug3("%s: %s", __func__, name);
1507 if ((r = sshbuf_put_cstring(c, name)) != 0 ||
1508 (r = sshbuf_put_string(c, NULL, 0)) != 0)
1509 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1513 add_string_option(struct sshbuf *c, const char *name, const char *value)
1518 debug3("%s: %s=%s", __func__, name, value);
1519 if ((b = sshbuf_new()) == NULL)
1520 fatal("%s: sshbuf_new failed", __func__);
1521 if ((r = sshbuf_put_cstring(b, value)) != 0 ||
1522 (r = sshbuf_put_cstring(c, name)) != 0 ||
1523 (r = sshbuf_put_stringb(c, b)) != 0)
1524 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1529 #define OPTIONS_CRITICAL 1
1530 #define OPTIONS_EXTENSIONS 2
1532 prepare_options_buf(struct sshbuf *c, int which)
1535 if ((which & OPTIONS_CRITICAL) != 0 &&
1536 certflags_command != NULL)
1537 add_string_option(c, "force-command", certflags_command);
1538 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1539 (certflags_flags & CERTOPT_X_FWD) != 0)
1540 add_flag_option(c, "permit-X11-forwarding");
1541 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1542 (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1543 add_flag_option(c, "permit-agent-forwarding");
1544 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1545 (certflags_flags & CERTOPT_PORT_FWD) != 0)
1546 add_flag_option(c, "permit-port-forwarding");
1547 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1548 (certflags_flags & CERTOPT_PTY) != 0)
1549 add_flag_option(c, "permit-pty");
1550 if ((which & OPTIONS_EXTENSIONS) != 0 &&
1551 (certflags_flags & CERTOPT_USER_RC) != 0)
1552 add_flag_option(c, "permit-user-rc");
1553 if ((which & OPTIONS_CRITICAL) != 0 &&
1554 certflags_src_addr != NULL)
1555 add_string_option(c, "source-address", certflags_src_addr);
1558 static struct sshkey *
1559 load_pkcs11_key(char *path)
1561 #ifdef ENABLE_PKCS11
1562 struct sshkey **keys = NULL, *public, *private = NULL;
1565 if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1566 fatal("Couldn't load CA public key \"%s\": %s",
1569 nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1570 debug3("%s: %d keys", __func__, nkeys);
1572 fatal("cannot read public key from pkcs11");
1573 for (i = 0; i < nkeys; i++) {
1574 if (sshkey_equal_public(public, keys[i])) {
1578 sshkey_free(keys[i]);
1581 sshkey_free(public);
1584 fatal("no pkcs11 support");
1585 #endif /* ENABLE_PKCS11 */
1589 do_ca_sign(struct passwd *pw, int argc, char **argv)
1593 struct sshkey *ca, *public;
1594 char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL;
1597 #ifdef ENABLE_PKCS11
1600 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1601 if (pkcs11provider != NULL) {
1602 if ((ca = load_pkcs11_key(tmp)) == NULL)
1603 fatal("No PKCS#11 key matching %s found", ca_key_path);
1605 ca = load_identity(tmp);
1608 if (key_type_name != NULL &&
1609 sshkey_type_from_name(key_type_name) != ca->type) {
1610 fatal("CA key type %s doesn't match specified %s",
1611 sshkey_ssh_name(ca), key_type_name);
1614 for (i = 0; i < argc; i++) {
1615 /* Split list of principals */
1617 if (cert_principals != NULL) {
1618 otmp = tmp = xstrdup(cert_principals);
1620 for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1621 plist = xreallocarray(plist, n + 1, sizeof(*plist));
1622 if (*(plist[n] = xstrdup(cp)) == '\0')
1623 fatal("Empty principal name");
1628 tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1629 if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1630 fatal("%s: unable to open \"%s\": %s",
1631 __func__, tmp, ssh_err(r));
1632 if (public->type != KEY_RSA && public->type != KEY_DSA &&
1633 public->type != KEY_ECDSA && public->type != KEY_ED25519)
1634 fatal("%s: key \"%s\" type %s cannot be certified",
1635 __func__, tmp, sshkey_type(public));
1637 /* Prepare certificate to sign */
1638 if ((r = sshkey_to_certified(public)) != 0)
1639 fatal("Could not upgrade key %s to certificate: %s",
1641 public->cert->type = cert_key_type;
1642 public->cert->serial = (u_int64_t)cert_serial;
1643 public->cert->key_id = xstrdup(cert_key_id);
1644 public->cert->nprincipals = n;
1645 public->cert->principals = plist;
1646 public->cert->valid_after = cert_valid_from;
1647 public->cert->valid_before = cert_valid_to;
1648 prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1649 prepare_options_buf(public->cert->extensions,
1650 OPTIONS_EXTENSIONS);
1651 if ((r = sshkey_from_private(ca,
1652 &public->cert->signature_key)) != 0)
1653 fatal("key_from_private (ca key): %s", ssh_err(r));
1655 if ((r = sshkey_certify(public, ca, key_type_name)) != 0)
1656 fatal("Couldn't certify key %s: %s", tmp, ssh_err(r));
1658 if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1660 xasprintf(&out, "%s-cert.pub", tmp);
1663 if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1664 fatal("Could not open \"%s\" for writing: %s", out,
1666 if ((f = fdopen(fd, "w")) == NULL)
1667 fatal("%s: fdopen: %s", __func__, strerror(errno));
1668 if ((r = sshkey_write(public, f)) != 0)
1669 fatal("Could not write certified key to %s: %s",
1671 fprintf(f, " %s\n", comment);
1675 sshkey_format_cert_validity(public->cert,
1676 valid, sizeof(valid));
1677 logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1678 "valid %s", sshkey_cert_type(public),
1679 out, public->cert->key_id,
1680 (unsigned long long)public->cert->serial,
1681 cert_principals != NULL ? " for " : "",
1682 cert_principals != NULL ? cert_principals : "",
1686 sshkey_free(public);
1689 #ifdef ENABLE_PKCS11
1696 parse_relative_time(const char *s, time_t now)
1700 mul = *s == '-' ? -1 : 1;
1702 if ((secs = convtime(s + 1)) == -1)
1703 fatal("Invalid relative certificate time %s", s);
1704 if (mul == -1 && secs > now)
1705 fatal("Certificate time %s cannot be represented", s);
1706 return now + (u_int64_t)(secs * mul);
1710 parse_absolute_time(const char *s)
1717 * POSIX strptime says "The application shall ensure that there
1718 * is white-space or other non-alphanumeric characters between
1719 * any two conversion specifications" so arrange things this way.
1721 switch (strlen(s)) {
1724 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6);
1727 fmt = "%Y-%m-%dT%H:%M:%S";
1728 snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s",
1729 s, s + 4, s + 6, s + 8, s + 10, s + 12);
1732 fatal("Invalid certificate time format %s", s);
1735 memset(&tm, 0, sizeof(tm));
1736 if (strptime(buf, fmt, &tm) == NULL)
1737 fatal("Invalid certificate time %s", s);
1738 if ((tt = mktime(&tm)) < 0)
1739 fatal("Certificate time %s cannot be represented", s);
1740 return (u_int64_t)tt;
1744 parse_cert_times(char *timespec)
1747 time_t now = time(NULL);
1750 /* +timespec relative to now */
1751 if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1752 if ((secs = convtime(timespec + 1)) == -1)
1753 fatal("Invalid relative certificate life %s", timespec);
1754 cert_valid_to = now + secs;
1756 * Backdate certificate one minute to avoid problems on hosts
1757 * with poorly-synchronised clocks.
1759 cert_valid_from = ((now - 59)/ 60) * 60;
1765 * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1766 * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS
1768 from = xstrdup(timespec);
1769 to = strchr(from, ':');
1770 if (to == NULL || from == to || *(to + 1) == '\0')
1771 fatal("Invalid certificate life specification %s", timespec);
1774 if (*from == '-' || *from == '+')
1775 cert_valid_from = parse_relative_time(from, now);
1777 cert_valid_from = parse_absolute_time(from);
1779 if (*to == '-' || *to == '+')
1780 cert_valid_to = parse_relative_time(to, now);
1782 cert_valid_to = parse_absolute_time(to);
1784 if (cert_valid_to <= cert_valid_from)
1785 fatal("Empty certificate validity interval");
1790 add_cert_option(char *opt)
1794 if (strcasecmp(opt, "clear") == 0)
1795 certflags_flags = 0;
1796 else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1797 certflags_flags &= ~CERTOPT_X_FWD;
1798 else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1799 certflags_flags |= CERTOPT_X_FWD;
1800 else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1801 certflags_flags &= ~CERTOPT_AGENT_FWD;
1802 else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1803 certflags_flags |= CERTOPT_AGENT_FWD;
1804 else if (strcasecmp(opt, "no-port-forwarding") == 0)
1805 certflags_flags &= ~CERTOPT_PORT_FWD;
1806 else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1807 certflags_flags |= CERTOPT_PORT_FWD;
1808 else if (strcasecmp(opt, "no-pty") == 0)
1809 certflags_flags &= ~CERTOPT_PTY;
1810 else if (strcasecmp(opt, "permit-pty") == 0)
1811 certflags_flags |= CERTOPT_PTY;
1812 else if (strcasecmp(opt, "no-user-rc") == 0)
1813 certflags_flags &= ~CERTOPT_USER_RC;
1814 else if (strcasecmp(opt, "permit-user-rc") == 0)
1815 certflags_flags |= CERTOPT_USER_RC;
1816 else if (strncasecmp(opt, "force-command=", 14) == 0) {
1819 fatal("Empty force-command option");
1820 if (certflags_command != NULL)
1821 fatal("force-command already specified");
1822 certflags_command = xstrdup(val);
1823 } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1826 fatal("Empty source-address option");
1827 if (certflags_src_addr != NULL)
1828 fatal("source-address already specified");
1829 if (addr_match_cidr_list(NULL, val) != 0)
1830 fatal("Invalid source-address list");
1831 certflags_src_addr = xstrdup(val);
1833 fatal("Unsupported certificate option \"%s\"", opt);
1837 show_options(struct sshbuf *optbuf, int in_critical)
1840 struct sshbuf *options, *option = NULL;
1843 if ((options = sshbuf_fromb(optbuf)) == NULL)
1844 fatal("%s: sshbuf_fromb failed", __func__);
1845 while (sshbuf_len(options) != 0) {
1846 sshbuf_free(option);
1848 if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
1849 (r = sshbuf_froms(options, &option)) != 0)
1850 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1851 printf(" %s", name);
1853 (strcmp(name, "permit-X11-forwarding") == 0 ||
1854 strcmp(name, "permit-agent-forwarding") == 0 ||
1855 strcmp(name, "permit-port-forwarding") == 0 ||
1856 strcmp(name, "permit-pty") == 0 ||
1857 strcmp(name, "permit-user-rc") == 0))
1859 else if (in_critical &&
1860 (strcmp(name, "force-command") == 0 ||
1861 strcmp(name, "source-address") == 0)) {
1862 if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
1863 fatal("%s: buffer error: %s",
1864 __func__, ssh_err(r));
1865 printf(" %s\n", arg);
1868 printf(" UNKNOWN OPTION (len %zu)\n",
1869 sshbuf_len(option));
1870 sshbuf_reset(option);
1873 if (sshbuf_len(option) != 0)
1874 fatal("Option corrupt: extra data at end");
1876 sshbuf_free(option);
1877 sshbuf_free(options);
1881 print_cert(struct sshkey *key)
1883 char valid[64], *key_fp, *ca_fp;
1886 key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
1887 ca_fp = sshkey_fingerprint(key->cert->signature_key,
1888 fingerprint_hash, SSH_FP_DEFAULT);
1889 if (key_fp == NULL || ca_fp == NULL)
1890 fatal("%s: sshkey_fingerprint fail", __func__);
1891 sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1893 printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
1894 sshkey_cert_type(key));
1895 printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1896 printf(" Signing CA: %s %s\n",
1897 sshkey_type(key->cert->signature_key), ca_fp);
1898 printf(" Key ID: \"%s\"\n", key->cert->key_id);
1899 printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1900 printf(" Valid: %s\n", valid);
1901 printf(" Principals: ");
1902 if (key->cert->nprincipals == 0)
1905 for (i = 0; i < key->cert->nprincipals; i++)
1907 key->cert->principals[i]);
1910 printf(" Critical Options: ");
1911 if (sshbuf_len(key->cert->critical) == 0)
1915 show_options(key->cert->critical, 1);
1917 printf(" Extensions: ");
1918 if (sshbuf_len(key->cert->extensions) == 0)
1922 show_options(key->cert->extensions, 0);
1927 do_show_cert(struct passwd *pw)
1929 struct sshkey *key = NULL;
1931 int r, is_stdin = 0, ok = 0;
1933 char *cp, line[SSH_MAX_PUBKEY_BYTES];
1938 ask_filename(pw, "Enter file in which the key is");
1939 if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) < 0)
1940 fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1942 path = identity_file;
1943 if (strcmp(path, "-") == 0) {
1947 } else if ((f = fopen(identity_file, "r")) == NULL)
1948 fatal("fopen %s: %s", identity_file, strerror(errno));
1950 while (read_keyfile_line(f, path, line, sizeof(line), &lnum) == 0) {
1953 /* Trim leading space and comments */
1954 cp = line + strspn(line, " \t");
1955 if (*cp == '#' || *cp == '\0')
1957 if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1959 if ((r = sshkey_read(key, &cp)) != 0) {
1960 error("%s:%lu: invalid key: %s", path,
1964 if (!sshkey_is_cert(key)) {
1965 error("%s:%lu is not a certificate", path, lnum);
1969 if (!is_stdin && lnum == 1)
1970 printf("%s:\n", path);
1972 printf("%s:%lu:\n", path, lnum);
1981 load_krl(const char *path, struct ssh_krl **krlp)
1983 struct sshbuf *krlbuf;
1986 if ((krlbuf = sshbuf_new()) == NULL)
1987 fatal("sshbuf_new failed");
1988 if ((fd = open(path, O_RDONLY)) == -1)
1989 fatal("open %s: %s", path, strerror(errno));
1990 if ((r = sshkey_load_file(fd, krlbuf)) != 0)
1991 fatal("Unable to load KRL: %s", ssh_err(r));
1993 /* XXX check sigs */
1994 if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1996 fatal("Invalid KRL file: %s", ssh_err(r));
1997 sshbuf_free(krlbuf);
2001 update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
2002 const struct sshkey *ca, struct ssh_krl *krl)
2004 struct sshkey *key = NULL;
2006 char *path, *cp, *ep, line[SSH_MAX_PUBKEY_BYTES];
2007 unsigned long long serial, serial2;
2008 int i, was_explicit_key, was_sha1, r;
2011 path = tilde_expand_filename(file, pw->pw_uid);
2012 if (strcmp(path, "-") == 0) {
2015 path = xstrdup("(standard input)");
2016 } else if ((krl_spec = fopen(path, "r")) == NULL)
2017 fatal("fopen %s: %s", path, strerror(errno));
2020 printf("Revoking from %s\n", path);
2021 while (read_keyfile_line(krl_spec, path, line, sizeof(line),
2023 was_explicit_key = was_sha1 = 0;
2024 cp = line + strspn(line, " \t");
2025 /* Trim trailing space, comments and strip \n */
2026 for (i = 0, r = -1; cp[i] != '\0'; i++) {
2027 if (cp[i] == '#' || cp[i] == '\n') {
2031 if (cp[i] == ' ' || cp[i] == '\t') {
2032 /* Remember the start of a span of whitespace */
2042 if (strncasecmp(cp, "serial:", 7) == 0) {
2043 if (ca == NULL && !wild_ca) {
2044 fatal("revoking certificates by serial number "
2045 "requires specification of a CA key");
2048 cp = cp + strspn(cp, " \t");
2050 serial = strtoull(cp, &ep, 0);
2051 if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2052 fatal("%s:%lu: invalid serial \"%s\"",
2054 if (errno == ERANGE && serial == ULLONG_MAX)
2055 fatal("%s:%lu: serial out of range",
2061 serial2 = strtoull(cp, &ep, 0);
2062 if (*cp == '\0' || *ep != '\0')
2063 fatal("%s:%lu: invalid serial \"%s\"",
2065 if (errno == ERANGE && serial2 == ULLONG_MAX)
2066 fatal("%s:%lu: serial out of range",
2068 if (serial2 <= serial)
2069 fatal("%s:%lu: invalid serial range "
2070 "%llu:%llu", path, lnum,
2071 (unsigned long long)serial,
2072 (unsigned long long)serial2);
2074 if (ssh_krl_revoke_cert_by_serial_range(krl,
2075 ca, serial, serial2) != 0) {
2076 fatal("%s: revoke serial failed",
2079 } else if (strncasecmp(cp, "id:", 3) == 0) {
2080 if (ca == NULL && !wild_ca) {
2081 fatal("revoking certificates by key ID "
2082 "requires specification of a CA key");
2085 cp = cp + strspn(cp, " \t");
2086 if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
2087 fatal("%s: revoke key ID failed", __func__);
2089 if (strncasecmp(cp, "key:", 4) == 0) {
2091 cp = cp + strspn(cp, " \t");
2092 was_explicit_key = 1;
2093 } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2095 cp = cp + strspn(cp, " \t");
2099 * Just try to process the line as a key.
2100 * Parsing will fail if it isn't.
2103 if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
2105 if ((r = sshkey_read(key, &cp)) != 0)
2106 fatal("%s:%lu: invalid key: %s",
2107 path, lnum, ssh_err(r));
2108 if (was_explicit_key)
2109 r = ssh_krl_revoke_key_explicit(krl, key);
2111 r = ssh_krl_revoke_key_sha1(krl, key);
2113 r = ssh_krl_revoke_key(krl, key);
2115 fatal("%s: revoke key failed: %s",
2116 __func__, ssh_err(r));
2120 if (strcmp(path, "-") != 0)
2126 do_gen_krl(struct passwd *pw, int updating, int argc, char **argv)
2128 struct ssh_krl *krl;
2130 struct sshkey *ca = NULL;
2131 int fd, i, r, wild_ca = 0;
2133 struct sshbuf *kbuf;
2135 if (*identity_file == '\0')
2136 fatal("KRL generation requires an output file");
2137 if (stat(identity_file, &sb) == -1) {
2138 if (errno != ENOENT)
2139 fatal("Cannot access KRL \"%s\": %s",
2140 identity_file, strerror(errno));
2142 fatal("KRL \"%s\" does not exist", identity_file);
2144 if (ca_key_path != NULL) {
2145 if (strcasecmp(ca_key_path, "none") == 0)
2148 tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2149 if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
2150 fatal("Cannot load CA public key %s: %s",
2157 load_krl(identity_file, &krl);
2158 else if ((krl = ssh_krl_init()) == NULL)
2159 fatal("couldn't create KRL");
2161 if (cert_serial != 0)
2162 ssh_krl_set_version(krl, cert_serial);
2163 if (identity_comment != NULL)
2164 ssh_krl_set_comment(krl, identity_comment);
2166 for (i = 0; i < argc; i++)
2167 update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
2169 if ((kbuf = sshbuf_new()) == NULL)
2170 fatal("sshbuf_new failed");
2171 if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
2172 fatal("Couldn't generate KRL");
2173 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2174 fatal("open %s: %s", identity_file, strerror(errno));
2175 if (atomicio(vwrite, fd, (void *)sshbuf_ptr(kbuf), sshbuf_len(kbuf)) !=
2177 fatal("write %s: %s", identity_file, strerror(errno));
2185 do_check_krl(struct passwd *pw, int argc, char **argv)
2189 struct ssh_krl *krl;
2192 if (*identity_file == '\0')
2193 fatal("KRL checking requires an input file");
2194 load_krl(identity_file, &krl);
2195 for (i = 0; i < argc; i++) {
2196 if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
2197 fatal("Cannot load public key %s: %s",
2198 argv[i], ssh_err(r));
2199 r = ssh_krl_check_key(krl, k);
2200 printf("%s%s%s%s: %s\n", argv[i],
2201 *comment ? " (" : "", comment, *comment ? ")" : "",
2202 r == 0 ? "ok" : "REVOKED");
2213 # define RSA1_USAGE " | rsa1"
2215 # define RSA1_USAGE ""
2222 "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa%s]\n"
2223 " [-N new_passphrase] [-C comment] [-f output_keyfile]\n"
2224 " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]\n"
2225 " ssh-keygen -i [-m key_format] [-f input_keyfile]\n"
2226 " ssh-keygen -e [-m key_format] [-f input_keyfile]\n"
2227 " ssh-keygen -y [-f input_keyfile]\n"
2228 " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n"
2229 " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
2230 " ssh-keygen -B [-f input_keyfile]\n", RSA1_USAGE);
2231 #ifdef ENABLE_PKCS11
2233 " ssh-keygen -D pkcs11\n");
2236 " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n"
2237 " ssh-keygen -H [-f known_hosts_file]\n"
2238 " ssh-keygen -R hostname [-f known_hosts_file]\n"
2239 " ssh-keygen -r hostname [-f input_keyfile] [-g]\n"
2241 " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n"
2242 " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n"
2243 " [-j start_line] [-K checkpt] [-W generator]\n"
2245 " ssh-keygen -s ca_key -I certificate_identity [-h] [-n principals]\n"
2246 " [-O option] [-V validity_interval] [-z serial_number] file ...\n"
2247 " ssh-keygen -L [-f input_keyfile]\n"
2249 " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
2251 " ssh-keygen -Q -f krl_file file ...\n");
2256 * Main program for key management.
2259 main(int argc, char **argv)
2261 char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2;
2262 char *rr_hostname = NULL, *ep, *fp, *ra;
2263 struct sshkey *private, *public;
2266 int r, opt, type, fd;
2267 int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
2271 /* Moduli generation/screening */
2272 char out_file[PATH_MAX], *checkpoint = NULL;
2273 u_int32_t memory = 0, generator_wanted = 0;
2274 int do_gen_candidates = 0, do_screen_candidates = 0;
2275 unsigned long start_lineno = 0, lines_to_process = 0;
2276 BIGNUM *start = NULL;
2280 extern char *optarg;
2282 ssh_malloc_init(); /* must be called before any mallocs */
2283 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
2286 __progname = ssh_get_progname(argv[0]);
2289 OpenSSL_add_all_algorithms();
2291 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
2297 /* we need this for the home * directory. */
2298 pw = getpwuid(getuid());
2300 fatal("No user exists for uid %lu", (u_long)getuid());
2301 if (gethostname(hostname, sizeof(hostname)) < 0)
2302 fatal("gethostname: %s", strerror(errno));
2304 /* Remaining characters: UYdw */
2305 while ((opt = getopt(argc, argv, "ABHLQXceghiklopquvxy"
2306 "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Z:"
2307 "a:b:f:g:j:m:n:r:s:t:z:")) != -1) {
2310 gen_all_hostkeys = 1;
2313 bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr);
2315 fatal("Bits has bad value %s (%s)",
2319 fingerprint_hash = ssh_digest_alg_by_name(optarg);
2320 if (fingerprint_hash == -1)
2321 fatal("Invalid hash algorithm \"%s\"", optarg);
2325 rr_hostname = optarg;
2331 cert_key_id = optarg;
2335 rr_hostname = optarg;
2341 print_fingerprint = 1;
2344 print_bubblebabble = 1;
2347 if (strcasecmp(optarg, "RFC4716") == 0 ||
2348 strcasecmp(optarg, "ssh2") == 0) {
2349 convert_format = FMT_RFC4716;
2352 if (strcasecmp(optarg, "PKCS8") == 0) {
2353 convert_format = FMT_PKCS8;
2356 if (strcasecmp(optarg, "PEM") == 0) {
2357 convert_format = FMT_PEM;
2360 fatal("Unsupported conversion format \"%s\"", optarg);
2362 cert_principals = optarg;
2368 change_passphrase = 1;
2374 if (strlcpy(identity_file, optarg,
2375 sizeof(identity_file)) >= sizeof(identity_file))
2376 fatal("Identity filename too long");
2383 identity_passphrase = optarg;
2386 identity_new_passphrase = optarg;
2392 add_cert_option(optarg);
2395 new_format_cipher = optarg;
2398 identity_comment = optarg;
2409 cert_key_type = SSH2_CERT_TYPE_HOST;
2410 certflags_flags = 0;
2424 ca_key_path = optarg;
2427 key_type_name = optarg;
2430 pkcs11provider = optarg;
2436 if (log_level == SYSLOG_LEVEL_INFO)
2437 log_level = SYSLOG_LEVEL_DEBUG1;
2439 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
2440 log_level < SYSLOG_LEVEL_DEBUG3)
2445 rr_hostname = optarg;
2448 rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
2450 fatal("Invalid number: %s (%s)",
2454 parse_cert_times(optarg);
2458 cert_serial = strtoull(optarg, &ep, 10);
2459 if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
2460 (errno == ERANGE && cert_serial == ULLONG_MAX))
2461 fatal("Invalid serial number \"%s\"", optarg);
2464 /* Moduli generation/screening */
2466 do_gen_candidates = 1;
2467 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2469 fatal("Output filename too long");
2472 lines_to_process = strtoul(optarg, NULL, 10);
2475 start_lineno = strtoul(optarg, NULL, 10);
2478 if (strlen(optarg) >= PATH_MAX)
2479 fatal("Checkpoint filename too long");
2480 checkpoint = xstrdup(optarg);
2483 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX,
2486 fatal("Memory limit is %s: %s", errstr, optarg);
2489 /* XXX - also compare length against bits */
2490 if (BN_hex2bn(&start, optarg) == 0)
2491 fatal("Invalid start point.");
2494 do_screen_candidates = 1;
2495 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
2497 fatal("Output filename too long");
2500 generator_wanted = (u_int32_t)strtonum(optarg, 1,
2503 fatal("Desired generator invalid: %s (%s)",
2506 #endif /* WITH_OPENSSL */
2514 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
2519 if (ca_key_path != NULL) {
2520 if (argc < 1 && !gen_krl) {
2521 error("Too few arguments.");
2524 } else if (argc > 0 && !gen_krl && !check_krl) {
2525 error("Too many arguments.");
2528 if (change_passphrase && change_comment) {
2529 error("Can only have one of -p and -c.");
2532 if (print_fingerprint && (delete_host || hash_hosts)) {
2533 error("Cannot use -l with -H or -R.");
2537 do_gen_krl(pw, update_krl, argc, argv);
2541 do_check_krl(pw, argc, argv);
2544 if (ca_key_path != NULL) {
2545 if (cert_key_id == NULL)
2546 fatal("Must specify key id (-I) when certifying");
2547 do_ca_sign(pw, argc, argv);
2551 if (delete_host || hash_hosts || find_host)
2552 do_known_hosts(pw, rr_hostname);
2553 if (pkcs11provider != NULL)
2555 if (print_fingerprint || print_bubblebabble)
2557 if (change_passphrase)
2558 do_change_passphrase(pw);
2560 do_change_comment(pw);
2565 do_convert_from(pw);
2568 do_print_public(pw);
2569 if (rr_hostname != NULL) {
2572 if (have_identity) {
2573 n = do_print_resource_record(pw,
2574 identity_file, rr_hostname);
2576 fatal("%s: %s", identity_file, strerror(errno));
2580 n += do_print_resource_record(pw,
2581 _PATH_HOST_RSA_KEY_FILE, rr_hostname);
2582 n += do_print_resource_record(pw,
2583 _PATH_HOST_DSA_KEY_FILE, rr_hostname);
2584 n += do_print_resource_record(pw,
2585 _PATH_HOST_ECDSA_KEY_FILE, rr_hostname);
2586 n += do_print_resource_record(pw,
2587 _PATH_HOST_ED25519_KEY_FILE, rr_hostname);
2589 fatal("no keys found.");
2595 if (do_gen_candidates) {
2596 FILE *out = fopen(out_file, "w");
2599 error("Couldn't open modulus candidate file \"%s\": %s",
2600 out_file, strerror(errno));
2604 bits = DEFAULT_BITS;
2605 if (gen_candidates(out, memory, bits, start) != 0)
2606 fatal("modulus candidate generation failed");
2611 if (do_screen_candidates) {
2613 FILE *out = fopen(out_file, "a");
2615 if (have_identity && strcmp(identity_file, "-") != 0) {
2616 if ((in = fopen(identity_file, "r")) == NULL) {
2617 fatal("Couldn't open modulus candidate "
2618 "file \"%s\": %s", identity_file,
2625 fatal("Couldn't open moduli file \"%s\": %s",
2626 out_file, strerror(errno));
2628 if (prime_test(in, out, rounds == 0 ? 100 : rounds,
2629 generator_wanted, checkpoint,
2630 start_lineno, lines_to_process) != 0)
2631 fatal("modulus screening failed");
2636 if (gen_all_hostkeys) {
2637 do_gen_all_hostkeys(pw);
2641 if (key_type_name == NULL)
2642 key_type_name = DEFAULT_KEY_TYPE_NAME;
2644 type = sshkey_type_from_name(key_type_name);
2645 type_bits_valid(type, key_type_name, &bits);
2648 printf("Generating public/private %s key pair.\n",
2650 if ((r = sshkey_generate(type, bits, &private)) != 0)
2651 fatal("key_generate failed");
2652 if ((r = sshkey_from_private(private, &public)) != 0)
2653 fatal("key_from_private failed: %s\n", ssh_err(r));
2656 ask_filename(pw, "Enter file in which to save the key");
2658 /* Create ~/.ssh directory if it doesn't already exist. */
2659 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
2660 pw->pw_dir, _PATH_SSH_USER_DIR);
2661 if (strstr(identity_file, dotsshdir) != NULL) {
2662 if (stat(dotsshdir, &st) < 0) {
2663 if (errno != ENOENT) {
2664 error("Could not stat %s: %s", dotsshdir,
2666 } else if (mkdir(dotsshdir, 0700) < 0) {
2667 error("Could not create directory '%s': %s",
2668 dotsshdir, strerror(errno));
2670 printf("Created directory '%s'.\n", dotsshdir);
2673 /* If the file already exists, ask the user to confirm. */
2674 if (stat(identity_file, &st) >= 0) {
2676 printf("%s already exists.\n", identity_file);
2677 printf("Overwrite (y/n)? ");
2679 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
2681 if (yesno[0] != 'y' && yesno[0] != 'Y')
2684 /* Ask for a passphrase (twice). */
2685 if (identity_passphrase)
2686 passphrase1 = xstrdup(identity_passphrase);
2687 else if (identity_new_passphrase)
2688 passphrase1 = xstrdup(identity_new_passphrase);
2692 read_passphrase("Enter passphrase (empty for no "
2693 "passphrase): ", RP_ALLOW_STDIN);
2694 passphrase2 = read_passphrase("Enter same passphrase again: ",
2696 if (strcmp(passphrase1, passphrase2) != 0) {
2698 * The passphrases do not match. Clear them and
2701 explicit_bzero(passphrase1, strlen(passphrase1));
2702 explicit_bzero(passphrase2, strlen(passphrase2));
2705 printf("Passphrases do not match. Try again.\n");
2706 goto passphrase_again;
2708 /* Clear the other copy of the passphrase. */
2709 explicit_bzero(passphrase2, strlen(passphrase2));
2713 if (identity_comment) {
2714 strlcpy(comment, identity_comment, sizeof(comment));
2716 /* Create default comment field for the passphrase. */
2717 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
2720 /* Save the key with the given passphrase and comment. */
2721 if ((r = sshkey_save_private(private, identity_file, passphrase1,
2722 comment, use_new_format, new_format_cipher, rounds)) != 0) {
2723 error("Saving key \"%s\" failed: %s",
2724 identity_file, ssh_err(r));
2725 explicit_bzero(passphrase1, strlen(passphrase1));
2729 /* Clear the passphrase. */
2730 explicit_bzero(passphrase1, strlen(passphrase1));
2733 /* Clear the private key and the random number generator. */
2734 sshkey_free(private);
2737 printf("Your identification has been saved in %s.\n", identity_file);
2739 strlcat(identity_file, ".pub", sizeof(identity_file));
2740 if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2741 fatal("Unable to save public key to %s: %s",
2742 identity_file, strerror(errno));
2743 if ((f = fdopen(fd, "w")) == NULL)
2744 fatal("fdopen %s failed: %s", identity_file, strerror(errno));
2745 if ((r = sshkey_write(public, f)) != 0)
2746 error("write key failed: %s", ssh_err(r));
2747 fprintf(f, " %s\n", comment);
2751 fp = sshkey_fingerprint(public, fingerprint_hash,
2753 ra = sshkey_fingerprint(public, fingerprint_hash,
2755 if (fp == NULL || ra == NULL)
2756 fatal("sshkey_fingerprint failed");
2757 printf("Your public key has been saved in %s.\n",
2759 printf("The key fingerprint is:\n");
2760 printf("%s %s\n", fp, comment);
2761 printf("The key's randomart image is:\n");
2767 sshkey_free(public);