1 /* $OpenBSD: sshkey.c,v 1.66 2018/07/03 13:20:25 djm Exp $ */
3 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
4 * Copyright (c) 2008 Alexander von Gernler. All rights reserved.
5 * Copyright (c) 2010,2011 Damien Miller. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/types.h>
31 #include <netinet/in.h>
34 #include <openssl/evp.h>
35 #include <openssl/err.h>
36 #include <openssl/pem.h>
39 #include "crypto_api.h"
48 #endif /* HAVE_UTIL_H */
56 #define SSHKEY_INTERNAL
58 #include "sshkey-xmss.h"
61 #include "xmss_fast.h"
63 #include "openbsd-compat/openssl-compat.h"
65 /* openssh private key file format */
66 #define MARK_BEGIN "-----BEGIN OPENSSH PRIVATE KEY-----\n"
67 #define MARK_END "-----END OPENSSH PRIVATE KEY-----\n"
68 #define MARK_BEGIN_LEN (sizeof(MARK_BEGIN) - 1)
69 #define MARK_END_LEN (sizeof(MARK_END) - 1)
70 #define KDFNAME "bcrypt"
71 #define AUTH_MAGIC "openssh-key-v1"
73 #define DEFAULT_CIPHERNAME "aes256-ctr"
74 #define DEFAULT_ROUNDS 16
76 /* Version identification string for SSH v1 identity files. */
77 #define LEGACY_BEGIN "SSH PRIVATE KEY FILE FORMAT 1.1\n"
79 int sshkey_private_serialize_opt(const struct sshkey *key,
80 struct sshbuf *buf, enum sshkey_serialize_rep);
81 static int sshkey_from_blob_internal(struct sshbuf *buf,
82 struct sshkey **keyp, int allow_cert);
84 /* Supported key types */
87 const char *shortname;
94 static const struct keytype keytypes[] = {
95 { "ssh-ed25519", "ED25519", NULL, KEY_ED25519, 0, 0, 0 },
96 { "ssh-ed25519-cert-v01@openssh.com", "ED25519-CERT", NULL,
97 KEY_ED25519_CERT, 0, 1, 0 },
99 { "ssh-xmss@openssh.com", "XMSS", NULL, KEY_XMSS, 0, 0, 0 },
100 { "ssh-xmss-cert-v01@openssh.com", "XMSS-CERT", NULL,
101 KEY_XMSS_CERT, 0, 1, 0 },
102 #endif /* WITH_XMSS */
104 { "ssh-rsa", "RSA", NULL, KEY_RSA, 0, 0, 0 },
105 { "rsa-sha2-256", "RSA", NULL, KEY_RSA, 0, 0, 1 },
106 { "rsa-sha2-512", "RSA", NULL, KEY_RSA, 0, 0, 1 },
107 { "ssh-dss", "DSA", NULL, KEY_DSA, 0, 0, 0 },
108 # ifdef OPENSSL_HAS_ECC
109 { "ecdsa-sha2-nistp256", "ECDSA", NULL,
110 KEY_ECDSA, NID_X9_62_prime256v1, 0, 0 },
111 { "ecdsa-sha2-nistp384", "ECDSA", NULL,
112 KEY_ECDSA, NID_secp384r1, 0, 0 },
113 # ifdef OPENSSL_HAS_NISTP521
114 { "ecdsa-sha2-nistp521", "ECDSA", NULL,
115 KEY_ECDSA, NID_secp521r1, 0, 0 },
116 # endif /* OPENSSL_HAS_NISTP521 */
117 # endif /* OPENSSL_HAS_ECC */
118 { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL,
119 KEY_RSA_CERT, 0, 1, 0 },
120 { "rsa-sha2-256-cert-v01@openssh.com", "RSA-CERT",
121 "ssh-rsa-sha2-256", KEY_RSA_CERT, 0, 1, 1 },
122 { "rsa-sha2-512-cert-v01@openssh.com", "RSA-CERT",
123 "ssh-rsa-sha2-512", KEY_RSA_CERT, 0, 1, 1 },
124 { "ssh-dss-cert-v01@openssh.com", "DSA-CERT", NULL,
125 KEY_DSA_CERT, 0, 1, 0 },
126 { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL,
127 KEY_RSA_CERT, 0, 1, 0 },
128 { "rsa-sha2-256-cert-v01@openssh.com", "RSA-CERT",
129 "ssh-rsa-sha2-256", KEY_RSA_CERT, 0, 1, 1 },
130 { "rsa-sha2-512-cert-v01@openssh.com", "RSA-CERT",
131 "ssh-rsa-sha2-512", KEY_RSA_CERT, 0, 1, 1 },
132 { "ssh-dss-cert-v01@openssh.com", "DSA-CERT", NULL,
133 KEY_DSA_CERT, 0, 1, 0 },
134 # ifdef OPENSSL_HAS_ECC
135 { "ecdsa-sha2-nistp256-cert-v01@openssh.com", "ECDSA-CERT", NULL,
136 KEY_ECDSA_CERT, NID_X9_62_prime256v1, 1, 0 },
137 { "ecdsa-sha2-nistp384-cert-v01@openssh.com", "ECDSA-CERT", NULL,
138 KEY_ECDSA_CERT, NID_secp384r1, 1, 0 },
139 # ifdef OPENSSL_HAS_NISTP521
140 { "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", NULL,
141 KEY_ECDSA_CERT, NID_secp521r1, 1, 0 },
142 # endif /* OPENSSL_HAS_NISTP521 */
143 # endif /* OPENSSL_HAS_ECC */
144 #endif /* WITH_OPENSSL */
145 { NULL, NULL, NULL, -1, -1, 0, 0 }
149 sshkey_type(const struct sshkey *k)
151 const struct keytype *kt;
153 for (kt = keytypes; kt->type != -1; kt++) {
154 if (kt->type == k->type)
155 return kt->shortname;
161 sshkey_ssh_name_from_type_nid(int type, int nid)
163 const struct keytype *kt;
165 for (kt = keytypes; kt->type != -1; kt++) {
166 if (kt->type == type && (kt->nid == 0 || kt->nid == nid))
169 return "ssh-unknown";
173 sshkey_type_is_cert(int type)
175 const struct keytype *kt;
177 for (kt = keytypes; kt->type != -1; kt++) {
178 if (kt->type == type)
185 sshkey_ssh_name(const struct sshkey *k)
187 return sshkey_ssh_name_from_type_nid(k->type, k->ecdsa_nid);
191 sshkey_ssh_name_plain(const struct sshkey *k)
193 return sshkey_ssh_name_from_type_nid(sshkey_type_plain(k->type),
198 sshkey_type_from_name(const char *name)
200 const struct keytype *kt;
202 for (kt = keytypes; kt->type != -1; kt++) {
203 /* Only allow shortname matches for plain key types */
204 if ((kt->name != NULL && strcmp(name, kt->name) == 0) ||
205 (!kt->cert && strcasecmp(kt->shortname, name) == 0))
212 sshkey_ecdsa_nid_from_name(const char *name)
214 const struct keytype *kt;
216 for (kt = keytypes; kt->type != -1; kt++) {
217 if (kt->type != KEY_ECDSA && kt->type != KEY_ECDSA_CERT)
219 if (kt->name != NULL && strcmp(name, kt->name) == 0)
226 sshkey_alg_list(int certs_only, int plain_only, int include_sigonly, char sep)
228 char *tmp, *ret = NULL;
229 size_t nlen, rlen = 0;
230 const struct keytype *kt;
232 for (kt = keytypes; kt->type != -1; kt++) {
233 if (kt->name == NULL)
235 if (!include_sigonly && kt->sigonly)
237 if ((certs_only && !kt->cert) || (plain_only && kt->cert))
241 nlen = strlen(kt->name);
242 if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) {
247 memcpy(ret + rlen, kt->name, nlen + 1);
254 sshkey_names_valid2(const char *names, int allow_wildcard)
257 const struct keytype *kt;
260 if (names == NULL || strcmp(names, "") == 0)
262 if ((s = cp = strdup(names)) == NULL)
264 for ((p = strsep(&cp, ",")); p && *p != '\0';
265 (p = strsep(&cp, ","))) {
266 type = sshkey_type_from_name(p);
267 if (type == KEY_UNSPEC) {
268 if (allow_wildcard) {
270 * Try matching key types against the string.
271 * If any has a positive or negative match then
272 * the component is accepted.
274 for (kt = keytypes; kt->type != -1; kt++) {
275 if (match_pattern_list(kt->name,
291 sshkey_size(const struct sshkey *k)
294 const BIGNUM *rsa_n, *dsa_p;
295 #endif /* WITH_OPENSSL */
303 RSA_get0_key(k->rsa, &rsa_n, NULL, NULL);
304 return BN_num_bits(rsa_n);
309 DSA_get0_pqg(k->dsa, &dsa_p, NULL, NULL);
310 return BN_num_bits(dsa_p);
313 return sshkey_curve_nid_to_bits(k->ecdsa_nid);
314 #endif /* WITH_OPENSSL */
316 case KEY_ED25519_CERT:
319 return 256; /* XXX */
325 sshkey_type_is_valid_ca(int type)
340 sshkey_is_cert(const struct sshkey *k)
344 return sshkey_type_is_cert(k->type);
347 /* Return the cert-less equivalent to a certified key type */
349 sshkey_type_plain(int type)
358 case KEY_ED25519_CERT:
368 /* XXX: these are really begging for a table-driven approach */
370 sshkey_curve_name_to_nid(const char *name)
372 if (strcmp(name, "nistp256") == 0)
373 return NID_X9_62_prime256v1;
374 else if (strcmp(name, "nistp384") == 0)
375 return NID_secp384r1;
376 # ifdef OPENSSL_HAS_NISTP521
377 else if (strcmp(name, "nistp521") == 0)
378 return NID_secp521r1;
379 # endif /* OPENSSL_HAS_NISTP521 */
385 sshkey_curve_nid_to_bits(int nid)
388 case NID_X9_62_prime256v1:
392 # ifdef OPENSSL_HAS_NISTP521
395 # endif /* OPENSSL_HAS_NISTP521 */
402 sshkey_ecdsa_bits_to_nid(int bits)
406 return NID_X9_62_prime256v1;
408 return NID_secp384r1;
409 # ifdef OPENSSL_HAS_NISTP521
411 return NID_secp521r1;
412 # endif /* OPENSSL_HAS_NISTP521 */
419 sshkey_curve_nid_to_name(int nid)
422 case NID_X9_62_prime256v1:
426 # ifdef OPENSSL_HAS_NISTP521
429 # endif /* OPENSSL_HAS_NISTP521 */
436 sshkey_ec_nid_to_hash_alg(int nid)
438 int kbits = sshkey_curve_nid_to_bits(nid);
443 /* RFC5656 section 6.2.1 */
445 return SSH_DIGEST_SHA256;
446 else if (kbits <= 384)
447 return SSH_DIGEST_SHA384;
449 return SSH_DIGEST_SHA512;
451 #endif /* WITH_OPENSSL */
454 cert_free(struct sshkey_cert *cert)
460 sshbuf_free(cert->certblob);
461 sshbuf_free(cert->critical);
462 sshbuf_free(cert->extensions);
464 for (i = 0; i < cert->nprincipals; i++)
465 free(cert->principals[i]);
466 free(cert->principals);
467 sshkey_free(cert->signature_key);
468 freezero(cert, sizeof(*cert));
471 static struct sshkey_cert *
474 struct sshkey_cert *cert;
476 if ((cert = calloc(1, sizeof(*cert))) == NULL)
478 if ((cert->certblob = sshbuf_new()) == NULL ||
479 (cert->critical = sshbuf_new()) == NULL ||
480 (cert->extensions = sshbuf_new()) == NULL) {
485 cert->principals = NULL;
486 cert->signature_key = NULL;
497 #endif /* WITH_OPENSSL */
499 if ((k = calloc(1, sizeof(*k))) == NULL)
507 k->ed25519_sk = NULL;
508 k->ed25519_pk = NULL;
515 if ((rsa = RSA_new()) == NULL) {
523 if ((dsa = DSA_new()) == NULL) {
531 /* Cannot do anything until we know the group */
533 #endif /* WITH_OPENSSL */
535 case KEY_ED25519_CERT:
538 /* no need to prealloc */
547 if (sshkey_is_cert(k)) {
548 if ((k->cert = cert_new()) == NULL) {
557 /* XXX garbage-collect this API */
559 sshkey_new_private(int type)
561 struct sshkey *k = sshkey_new(type);
569 sshkey_free(struct sshkey *k)
585 # ifdef OPENSSL_HAS_ECC
588 EC_KEY_free(k->ecdsa);
591 # endif /* OPENSSL_HAS_ECC */
592 #endif /* WITH_OPENSSL */
594 case KEY_ED25519_CERT:
595 freezero(k->ed25519_pk, ED25519_PK_SZ);
596 k->ed25519_pk = NULL;
597 freezero(k->ed25519_sk, ED25519_SK_SZ);
598 k->ed25519_sk = NULL;
603 freezero(k->xmss_pk, sshkey_xmss_pklen(k));
605 freezero(k->xmss_sk, sshkey_xmss_sklen(k));
607 sshkey_xmss_free_state(k);
610 free(k->xmss_filename);
611 k->xmss_filename = NULL;
613 #endif /* WITH_XMSS */
619 if (sshkey_is_cert(k))
621 freezero(k, sizeof(*k));
625 cert_compare(struct sshkey_cert *a, struct sshkey_cert *b)
627 if (a == NULL && b == NULL)
629 if (a == NULL || b == NULL)
631 if (sshbuf_len(a->certblob) != sshbuf_len(b->certblob))
633 if (timingsafe_bcmp(sshbuf_ptr(a->certblob), sshbuf_ptr(b->certblob),
634 sshbuf_len(a->certblob)) != 0)
640 * Compare public portions of key only, allowing comparisons between
641 * certificates and plain keys too.
644 sshkey_equal_public(const struct sshkey *a, const struct sshkey *b)
646 #if defined(WITH_OPENSSL)
647 const BIGNUM *rsa_e_a, *rsa_n_a;
648 const BIGNUM *rsa_e_b, *rsa_n_b;
649 const BIGNUM *dsa_p_a, *dsa_q_a, *dsa_g_a, *dsa_pub_key_a;
650 const BIGNUM *dsa_p_b, *dsa_q_b, *dsa_g_b, *dsa_pub_key_b;
651 # if defined(OPENSSL_HAS_ECC)
653 # endif /* OPENSSL_HAS_ECC */
654 #endif /* WITH_OPENSSL */
656 if (a == NULL || b == NULL ||
657 sshkey_type_plain(a->type) != sshkey_type_plain(b->type))
664 if (a->rsa == NULL || b->rsa == NULL)
666 RSA_get0_key(a->rsa, &rsa_n_a, &rsa_e_a, NULL);
667 RSA_get0_key(b->rsa, &rsa_n_b, &rsa_e_b, NULL);
668 return BN_cmp(rsa_e_a, rsa_e_b) == 0 &&
669 BN_cmp(rsa_n_a, rsa_n_b) == 0;
672 if (a->dsa == NULL || b->dsa == NULL)
674 DSA_get0_pqg(a->dsa, &dsa_p_a, &dsa_q_a, &dsa_g_a);
675 DSA_get0_pqg(b->dsa, &dsa_p_b, &dsa_q_b, &dsa_g_b);
676 DSA_get0_key(a->dsa, &dsa_pub_key_a, NULL);
677 DSA_get0_key(b->dsa, &dsa_pub_key_b, NULL);
678 return BN_cmp(dsa_p_a, dsa_p_b) == 0 &&
679 BN_cmp(dsa_q_a, dsa_q_b) == 0 &&
680 BN_cmp(dsa_g_a, dsa_g_b) == 0 &&
681 BN_cmp(dsa_pub_key_a, dsa_pub_key_b) == 0;
682 # ifdef OPENSSL_HAS_ECC
685 if (a->ecdsa == NULL || b->ecdsa == NULL ||
686 EC_KEY_get0_public_key(a->ecdsa) == NULL ||
687 EC_KEY_get0_public_key(b->ecdsa) == NULL)
689 if ((bnctx = BN_CTX_new()) == NULL)
691 if (EC_GROUP_cmp(EC_KEY_get0_group(a->ecdsa),
692 EC_KEY_get0_group(b->ecdsa), bnctx) != 0 ||
693 EC_POINT_cmp(EC_KEY_get0_group(a->ecdsa),
694 EC_KEY_get0_public_key(a->ecdsa),
695 EC_KEY_get0_public_key(b->ecdsa), bnctx) != 0) {
701 # endif /* OPENSSL_HAS_ECC */
702 #endif /* WITH_OPENSSL */
704 case KEY_ED25519_CERT:
705 return a->ed25519_pk != NULL && b->ed25519_pk != NULL &&
706 memcmp(a->ed25519_pk, b->ed25519_pk, ED25519_PK_SZ) == 0;
710 return a->xmss_pk != NULL && b->xmss_pk != NULL &&
711 sshkey_xmss_pklen(a) == sshkey_xmss_pklen(b) &&
712 memcmp(a->xmss_pk, b->xmss_pk, sshkey_xmss_pklen(a)) == 0;
713 #endif /* WITH_XMSS */
721 sshkey_equal(const struct sshkey *a, const struct sshkey *b)
723 if (a == NULL || b == NULL || a->type != b->type)
725 if (sshkey_is_cert(a)) {
726 if (!cert_compare(a->cert, b->cert))
729 return sshkey_equal_public(a, b);
733 to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
734 enum sshkey_serialize_rep opts)
736 int type, ret = SSH_ERR_INTERNAL_ERROR;
737 const char *typename;
739 const BIGNUM *rsa_n, *rsa_e, *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
740 #endif /* WITH_OPENSSL */
743 return SSH_ERR_INVALID_ARGUMENT;
745 if (sshkey_is_cert(key)) {
746 if (key->cert == NULL)
747 return SSH_ERR_EXPECTED_CERT;
748 if (sshbuf_len(key->cert->certblob) == 0)
749 return SSH_ERR_KEY_LACKS_CERTBLOB;
751 type = force_plain ? sshkey_type_plain(key->type) : key->type;
752 typename = sshkey_ssh_name_from_type_nid(type, key->ecdsa_nid);
759 #endif /* WITH_OPENSSL */
760 case KEY_ED25519_CERT:
763 #endif /* WITH_XMSS */
764 /* Use the existing blob */
765 /* XXX modified flag? */
766 if ((ret = sshbuf_putb(b, key->cert->certblob)) != 0)
771 if (key->dsa == NULL)
772 return SSH_ERR_INVALID_ARGUMENT;
773 DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
774 DSA_get0_key(key->dsa, &dsa_pub_key, NULL);
775 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
776 (ret = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
777 (ret = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
778 (ret = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
779 (ret = sshbuf_put_bignum2(b, dsa_pub_key)) != 0)
782 # ifdef OPENSSL_HAS_ECC
784 if (key->ecdsa == NULL)
785 return SSH_ERR_INVALID_ARGUMENT;
786 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
787 (ret = sshbuf_put_cstring(b,
788 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
789 (ret = sshbuf_put_eckey(b, key->ecdsa)) != 0)
794 if (key->rsa == NULL)
795 return SSH_ERR_INVALID_ARGUMENT;
796 RSA_get0_key(key->rsa, &rsa_n, &rsa_e, NULL);
797 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
798 (ret = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
799 (ret = sshbuf_put_bignum2(b, rsa_n)) != 0)
802 #endif /* WITH_OPENSSL */
804 if (key->ed25519_pk == NULL)
805 return SSH_ERR_INVALID_ARGUMENT;
806 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
807 (ret = sshbuf_put_string(b,
808 key->ed25519_pk, ED25519_PK_SZ)) != 0)
813 if (key->xmss_name == NULL || key->xmss_pk == NULL ||
814 sshkey_xmss_pklen(key) == 0)
815 return SSH_ERR_INVALID_ARGUMENT;
816 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
817 (ret = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
818 (ret = sshbuf_put_string(b,
819 key->xmss_pk, sshkey_xmss_pklen(key))) != 0 ||
820 (ret = sshkey_xmss_serialize_pk_info(key, b, opts)) != 0)
823 #endif /* WITH_XMSS */
825 return SSH_ERR_KEY_TYPE_UNKNOWN;
831 sshkey_putb(const struct sshkey *key, struct sshbuf *b)
833 return to_blob_buf(key, b, 0, SSHKEY_SERIALIZE_DEFAULT);
837 sshkey_puts_opts(const struct sshkey *key, struct sshbuf *b,
838 enum sshkey_serialize_rep opts)
843 if ((tmp = sshbuf_new()) == NULL)
844 return SSH_ERR_ALLOC_FAIL;
845 r = to_blob_buf(key, tmp, 0, opts);
847 r = sshbuf_put_stringb(b, tmp);
853 sshkey_puts(const struct sshkey *key, struct sshbuf *b)
855 return sshkey_puts_opts(key, b, SSHKEY_SERIALIZE_DEFAULT);
859 sshkey_putb_plain(const struct sshkey *key, struct sshbuf *b)
861 return to_blob_buf(key, b, 1, SSHKEY_SERIALIZE_DEFAULT);
865 to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp, int force_plain,
866 enum sshkey_serialize_rep opts)
868 int ret = SSH_ERR_INTERNAL_ERROR;
870 struct sshbuf *b = NULL;
876 if ((b = sshbuf_new()) == NULL)
877 return SSH_ERR_ALLOC_FAIL;
878 if ((ret = to_blob_buf(key, b, force_plain, opts)) != 0)
884 if ((*blobp = malloc(len)) == NULL) {
885 ret = SSH_ERR_ALLOC_FAIL;
888 memcpy(*blobp, sshbuf_ptr(b), len);
897 sshkey_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
899 return to_blob(key, blobp, lenp, 0, SSHKEY_SERIALIZE_DEFAULT);
903 sshkey_plain_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
905 return to_blob(key, blobp, lenp, 1, SSHKEY_SERIALIZE_DEFAULT);
909 sshkey_fingerprint_raw(const struct sshkey *k, int dgst_alg,
910 u_char **retp, size_t *lenp)
912 u_char *blob = NULL, *ret = NULL;
914 int r = SSH_ERR_INTERNAL_ERROR;
920 if (ssh_digest_bytes(dgst_alg) == 0) {
921 r = SSH_ERR_INVALID_ARGUMENT;
924 if ((r = to_blob(k, &blob, &blob_len, 1, SSHKEY_SERIALIZE_DEFAULT))
927 if ((ret = calloc(1, SSH_DIGEST_MAX_LENGTH)) == NULL) {
928 r = SSH_ERR_ALLOC_FAIL;
931 if ((r = ssh_digest_memory(dgst_alg, blob, blob_len,
932 ret, SSH_DIGEST_MAX_LENGTH)) != 0)
940 *lenp = ssh_digest_bytes(dgst_alg);
945 explicit_bzero(blob, blob_len);
952 fingerprint_b64(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
955 size_t plen = strlen(alg) + 1;
956 size_t rlen = ((dgst_raw_len + 2) / 3) * 4 + plen + 1;
959 if (dgst_raw_len > 65536 || (ret = calloc(1, rlen)) == NULL)
961 strlcpy(ret, alg, rlen);
962 strlcat(ret, ":", rlen);
963 if (dgst_raw_len == 0)
965 if ((r = b64_ntop(dgst_raw, dgst_raw_len,
966 ret + plen, rlen - plen)) == -1) {
970 /* Trim padding characters from end */
971 ret[strcspn(ret, "=")] = '\0';
976 fingerprint_hex(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
978 char *retval, hex[5];
979 size_t i, rlen = dgst_raw_len * 3 + strlen(alg) + 2;
981 if (dgst_raw_len > 65536 || (retval = calloc(1, rlen)) == NULL)
983 strlcpy(retval, alg, rlen);
984 strlcat(retval, ":", rlen);
985 for (i = 0; i < dgst_raw_len; i++) {
986 snprintf(hex, sizeof(hex), "%s%02x",
987 i > 0 ? ":" : "", dgst_raw[i]);
988 strlcat(retval, hex, rlen);
994 fingerprint_bubblebabble(u_char *dgst_raw, size_t dgst_raw_len)
996 char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' };
997 char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
998 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' };
999 u_int i, j = 0, rounds, seed = 1;
1002 rounds = (dgst_raw_len / 2) + 1;
1003 if ((retval = calloc(rounds, 6)) == NULL)
1006 for (i = 0; i < rounds; i++) {
1007 u_int idx0, idx1, idx2, idx3, idx4;
1008 if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) {
1009 idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) +
1011 idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15;
1012 idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) +
1014 retval[j++] = vowels[idx0];
1015 retval[j++] = consonants[idx1];
1016 retval[j++] = vowels[idx2];
1017 if ((i + 1) < rounds) {
1018 idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15;
1019 idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15;
1020 retval[j++] = consonants[idx3];
1022 retval[j++] = consonants[idx4];
1023 seed = ((seed * 5) +
1024 ((((u_int)(dgst_raw[2 * i])) * 7) +
1025 ((u_int)(dgst_raw[(2 * i) + 1])))) % 36;
1031 retval[j++] = vowels[idx0];
1032 retval[j++] = consonants[idx1];
1033 retval[j++] = vowels[idx2];
1042 * Draw an ASCII-Art representing the fingerprint so human brain can
1043 * profit from its built-in pattern recognition ability.
1044 * This technique is called "random art" and can be found in some
1045 * scientific publications like this original paper:
1047 * "Hash Visualization: a New Technique to improve Real-World Security",
1048 * Perrig A. and Song D., 1999, International Workshop on Cryptographic
1049 * Techniques and E-Commerce (CrypTEC '99)
1050 * sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf
1052 * The subject came up in a talk by Dan Kaminsky, too.
1054 * If you see the picture is different, the key is different.
1055 * If the picture looks the same, you still know nothing.
1057 * The algorithm used here is a worm crawling over a discrete plane,
1058 * leaving a trace (augmenting the field) everywhere it goes.
1059 * Movement is taken from dgst_raw 2bit-wise. Bumping into walls
1060 * makes the respective movement vector be ignored for this turn.
1061 * Graphs are not unambiguous, because circles in graphs can be
1062 * walked in either direction.
1066 * Field sizes for the random art. Have to be odd, so the starting point
1067 * can be in the exact middle of the picture, and FLDBASE should be >=8 .
1068 * Else pictures would be too dense, and drawing the frame would
1069 * fail, too, because the key type would not fit in anymore.
1072 #define FLDSIZE_Y (FLDBASE + 1)
1073 #define FLDSIZE_X (FLDBASE * 2 + 1)
1075 fingerprint_randomart(const char *alg, u_char *dgst_raw, size_t dgst_raw_len,
1076 const struct sshkey *k)
1079 * Chars to be used after each other every time the worm
1080 * intersects with itself. Matter of taste.
1082 char *augmentation_string = " .o+=*BOX@%&#/^SE";
1083 char *retval, *p, title[FLDSIZE_X], hash[FLDSIZE_X];
1084 u_char field[FLDSIZE_X][FLDSIZE_Y];
1085 size_t i, tlen, hlen;
1088 size_t len = strlen(augmentation_string) - 1;
1090 if ((retval = calloc((FLDSIZE_X + 3), (FLDSIZE_Y + 2))) == NULL)
1093 /* initialize field */
1094 memset(field, 0, FLDSIZE_X * FLDSIZE_Y * sizeof(char));
1098 /* process raw key */
1099 for (i = 0; i < dgst_raw_len; i++) {
1101 /* each byte conveys four 2-bit move commands */
1102 input = dgst_raw[i];
1103 for (b = 0; b < 4; b++) {
1104 /* evaluate 2 bit, rest is shifted later */
1105 x += (input & 0x1) ? 1 : -1;
1106 y += (input & 0x2) ? 1 : -1;
1108 /* assure we are still in bounds */
1111 x = MINIMUM(x, FLDSIZE_X - 1);
1112 y = MINIMUM(y, FLDSIZE_Y - 1);
1114 /* augment the field */
1115 if (field[x][y] < len - 2)
1121 /* mark starting point and end point*/
1122 field[FLDSIZE_X / 2][FLDSIZE_Y / 2] = len - 1;
1125 /* assemble title */
1126 r = snprintf(title, sizeof(title), "[%s %u]",
1127 sshkey_type(k), sshkey_size(k));
1128 /* If [type size] won't fit, then try [type]; fits "[ED25519-CERT]" */
1129 if (r < 0 || r > (int)sizeof(title))
1130 r = snprintf(title, sizeof(title), "[%s]", sshkey_type(k));
1131 tlen = (r <= 0) ? 0 : strlen(title);
1133 /* assemble hash ID. */
1134 r = snprintf(hash, sizeof(hash), "[%s]", alg);
1135 hlen = (r <= 0) ? 0 : strlen(hash);
1137 /* output upper border */
1140 for (i = 0; i < (FLDSIZE_X - tlen) / 2; i++)
1142 memcpy(p, title, tlen);
1144 for (i += tlen; i < FLDSIZE_X; i++)
1149 /* output content */
1150 for (y = 0; y < FLDSIZE_Y; y++) {
1152 for (x = 0; x < FLDSIZE_X; x++)
1153 *p++ = augmentation_string[MINIMUM(field[x][y], len)];
1158 /* output lower border */
1160 for (i = 0; i < (FLDSIZE_X - hlen) / 2; i++)
1162 memcpy(p, hash, hlen);
1164 for (i += hlen; i < FLDSIZE_X; i++)
1172 sshkey_fingerprint(const struct sshkey *k, int dgst_alg,
1173 enum sshkey_fp_rep dgst_rep)
1175 char *retval = NULL;
1177 size_t dgst_raw_len;
1179 if (sshkey_fingerprint_raw(k, dgst_alg, &dgst_raw, &dgst_raw_len) != 0)
1182 case SSH_FP_DEFAULT:
1183 if (dgst_alg == SSH_DIGEST_MD5) {
1184 retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
1185 dgst_raw, dgst_raw_len);
1187 retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
1188 dgst_raw, dgst_raw_len);
1192 retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
1193 dgst_raw, dgst_raw_len);
1196 retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
1197 dgst_raw, dgst_raw_len);
1199 case SSH_FP_BUBBLEBABBLE:
1200 retval = fingerprint_bubblebabble(dgst_raw, dgst_raw_len);
1202 case SSH_FP_RANDOMART:
1203 retval = fingerprint_randomart(ssh_digest_alg_name(dgst_alg),
1204 dgst_raw, dgst_raw_len, k);
1207 explicit_bzero(dgst_raw, dgst_raw_len);
1211 explicit_bzero(dgst_raw, dgst_raw_len);
1217 peek_type_nid(const char *s, size_t l, int *nid)
1219 const struct keytype *kt;
1221 for (kt = keytypes; kt->type != -1; kt++) {
1222 if (kt->name == NULL || strlen(kt->name) != l)
1224 if (memcmp(s, kt->name, l) == 0) {
1226 if (kt->type == KEY_ECDSA || kt->type == KEY_ECDSA_CERT)
1234 /* XXX this can now be made const char * */
1236 sshkey_read(struct sshkey *ret, char **cpp)
1239 char *cp, *blobcopy;
1241 int r, type, curve_nid = -1;
1242 struct sshbuf *blob;
1245 return SSH_ERR_INVALID_ARGUMENT;
1247 switch (ret->type) {
1254 case KEY_ECDSA_CERT:
1256 case KEY_ED25519_CERT:
1260 #endif /* WITH_XMSS */
1263 return SSH_ERR_INVALID_ARGUMENT;
1268 space = strcspn(cp, " \t");
1269 if (space == strlen(cp))
1270 return SSH_ERR_INVALID_FORMAT;
1271 if ((type = peek_type_nid(cp, space, &curve_nid)) == KEY_UNSPEC)
1272 return SSH_ERR_INVALID_FORMAT;
1274 /* skip whitespace */
1275 for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
1278 return SSH_ERR_INVALID_FORMAT;
1279 if (ret->type != KEY_UNSPEC && ret->type != type)
1280 return SSH_ERR_KEY_TYPE_MISMATCH;
1281 if ((blob = sshbuf_new()) == NULL)
1282 return SSH_ERR_ALLOC_FAIL;
1284 /* find end of keyblob and decode */
1285 space = strcspn(cp, " \t");
1286 if ((blobcopy = strndup(cp, space)) == NULL) {
1288 return SSH_ERR_ALLOC_FAIL;
1290 if ((r = sshbuf_b64tod(blob, blobcopy)) != 0) {
1296 if ((r = sshkey_fromb(blob, &k)) != 0) {
1302 /* skip whitespace and leave cp at start of comment */
1303 for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
1306 /* ensure type of blob matches type at start of line */
1307 if (k->type != type) {
1309 return SSH_ERR_KEY_TYPE_MISMATCH;
1311 if (sshkey_type_plain(type) == KEY_ECDSA && curve_nid != k->ecdsa_nid) {
1313 return SSH_ERR_EC_CURVE_MISMATCH;
1316 /* Fill in ret from parsed key */
1318 if (sshkey_is_cert(ret)) {
1319 if (!sshkey_is_cert(k)) {
1321 return SSH_ERR_EXPECTED_CERT;
1323 if (ret->cert != NULL)
1324 cert_free(ret->cert);
1325 ret->cert = k->cert;
1328 switch (sshkey_type_plain(ret->type)) {
1335 RSA_print_fp(stderr, ret->rsa, 8);
1343 DSA_print_fp(stderr, ret->dsa, 8);
1346 # ifdef OPENSSL_HAS_ECC
1348 EC_KEY_free(ret->ecdsa);
1349 ret->ecdsa = k->ecdsa;
1350 ret->ecdsa_nid = k->ecdsa_nid;
1354 sshkey_dump_ec_key(ret->ecdsa);
1357 # endif /* OPENSSL_HAS_ECC */
1358 #endif /* WITH_OPENSSL */
1360 freezero(ret->ed25519_pk, ED25519_PK_SZ);
1361 ret->ed25519_pk = k->ed25519_pk;
1362 k->ed25519_pk = NULL;
1370 ret->xmss_pk = k->xmss_pk;
1372 free(ret->xmss_state);
1373 ret->xmss_state = k->xmss_state;
1374 k->xmss_state = NULL;
1375 free(ret->xmss_name);
1376 ret->xmss_name = k->xmss_name;
1377 k->xmss_name = NULL;
1378 free(ret->xmss_filename);
1379 ret->xmss_filename = k->xmss_filename;
1380 k->xmss_filename = NULL;
1385 #endif /* WITH_XMSS */
1388 return SSH_ERR_INTERNAL_ERROR;
1399 sshkey_to_base64(const struct sshkey *key, char **b64p)
1401 int r = SSH_ERR_INTERNAL_ERROR;
1402 struct sshbuf *b = NULL;
1407 if ((b = sshbuf_new()) == NULL)
1408 return SSH_ERR_ALLOC_FAIL;
1409 if ((r = sshkey_putb(key, b)) != 0)
1411 if ((uu = sshbuf_dtob64(b)) == NULL) {
1412 r = SSH_ERR_ALLOC_FAIL;
1428 sshkey_format_text(const struct sshkey *key, struct sshbuf *b)
1430 int r = SSH_ERR_INTERNAL_ERROR;
1433 if ((r = sshkey_to_base64(key, &uu)) != 0)
1435 if ((r = sshbuf_putf(b, "%s %s",
1436 sshkey_ssh_name(key), uu)) != 0)
1445 sshkey_write(const struct sshkey *key, FILE *f)
1447 struct sshbuf *b = NULL;
1448 int r = SSH_ERR_INTERNAL_ERROR;
1450 if ((b = sshbuf_new()) == NULL)
1451 return SSH_ERR_ALLOC_FAIL;
1452 if ((r = sshkey_format_text(key, b)) != 0)
1454 if (fwrite(sshbuf_ptr(b), sshbuf_len(b), 1, f) != 1) {
1457 r = SSH_ERR_SYSTEM_ERROR;
1468 sshkey_cert_type(const struct sshkey *k)
1470 switch (k->cert->type) {
1471 case SSH2_CERT_TYPE_USER:
1473 case SSH2_CERT_TYPE_HOST:
1482 rsa_generate_private_key(u_int bits, RSA **rsap)
1484 RSA *private = NULL;
1486 int ret = SSH_ERR_INTERNAL_ERROR;
1489 return SSH_ERR_INVALID_ARGUMENT;
1490 if (bits < SSH_RSA_MINIMUM_MODULUS_SIZE ||
1491 bits > SSHBUF_MAX_BIGNUM * 8)
1492 return SSH_ERR_KEY_LENGTH;
1494 if ((private = RSA_new()) == NULL || (f4 = BN_new()) == NULL) {
1495 ret = SSH_ERR_ALLOC_FAIL;
1498 if (!BN_set_word(f4, RSA_F4) ||
1499 !RSA_generate_key_ex(private, bits, f4, NULL)) {
1500 ret = SSH_ERR_LIBCRYPTO_ERROR;
1513 dsa_generate_private_key(u_int bits, DSA **dsap)
1516 int ret = SSH_ERR_INTERNAL_ERROR;
1519 return SSH_ERR_INVALID_ARGUMENT;
1521 return SSH_ERR_KEY_LENGTH;
1522 if ((private = DSA_new()) == NULL) {
1523 ret = SSH_ERR_ALLOC_FAIL;
1527 if (!DSA_generate_parameters_ex(private, bits, NULL, 0, NULL,
1528 NULL, NULL) || !DSA_generate_key(private)) {
1529 ret = SSH_ERR_LIBCRYPTO_ERROR;
1540 # ifdef OPENSSL_HAS_ECC
1542 sshkey_ecdsa_key_to_nid(EC_KEY *k)
1546 NID_X9_62_prime256v1,
1548 # ifdef OPENSSL_HAS_NISTP521
1550 # endif /* OPENSSL_HAS_NISTP521 */
1556 const EC_GROUP *g = EC_KEY_get0_group(k);
1559 * The group may be stored in a ASN.1 encoded private key in one of two
1560 * ways: as a "named group", which is reconstituted by ASN.1 object ID
1561 * or explicit group parameters encoded into the key blob. Only the
1562 * "named group" case sets the group NID for us, but we can figure
1563 * it out for the other case by comparing against all the groups that
1566 if ((nid = EC_GROUP_get_curve_name(g)) > 0)
1568 if ((bnctx = BN_CTX_new()) == NULL)
1570 for (i = 0; nids[i] != -1; i++) {
1571 if ((eg = EC_GROUP_new_by_curve_name(nids[i])) == NULL) {
1575 if (EC_GROUP_cmp(g, eg, bnctx) == 0)
1580 if (nids[i] != -1) {
1581 /* Use the group with the NID attached */
1582 EC_GROUP_set_asn1_flag(eg, OPENSSL_EC_NAMED_CURVE);
1583 if (EC_KEY_set_group(k, eg) != 1) {
1592 ecdsa_generate_private_key(u_int bits, int *nid, EC_KEY **ecdsap)
1595 int ret = SSH_ERR_INTERNAL_ERROR;
1597 if (nid == NULL || ecdsap == NULL)
1598 return SSH_ERR_INVALID_ARGUMENT;
1599 if ((*nid = sshkey_ecdsa_bits_to_nid(bits)) == -1)
1600 return SSH_ERR_KEY_LENGTH;
1602 if ((private = EC_KEY_new_by_curve_name(*nid)) == NULL) {
1603 ret = SSH_ERR_ALLOC_FAIL;
1606 if (EC_KEY_generate_key(private) != 1) {
1607 ret = SSH_ERR_LIBCRYPTO_ERROR;
1610 EC_KEY_set_asn1_flag(private, OPENSSL_EC_NAMED_CURVE);
1615 EC_KEY_free(private);
1618 # endif /* OPENSSL_HAS_ECC */
1619 #endif /* WITH_OPENSSL */
1622 sshkey_generate(int type, u_int bits, struct sshkey **keyp)
1625 int ret = SSH_ERR_INTERNAL_ERROR;
1628 return SSH_ERR_INVALID_ARGUMENT;
1630 if ((k = sshkey_new(KEY_UNSPEC)) == NULL)
1631 return SSH_ERR_ALLOC_FAIL;
1634 if ((k->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL ||
1635 (k->ed25519_sk = malloc(ED25519_SK_SZ)) == NULL) {
1636 ret = SSH_ERR_ALLOC_FAIL;
1639 crypto_sign_ed25519_keypair(k->ed25519_pk, k->ed25519_sk);
1644 ret = sshkey_xmss_generate_private_key(k, bits);
1646 #endif /* WITH_XMSS */
1649 ret = dsa_generate_private_key(bits, &k->dsa);
1651 # ifdef OPENSSL_HAS_ECC
1653 ret = ecdsa_generate_private_key(bits, &k->ecdsa_nid,
1656 # endif /* OPENSSL_HAS_ECC */
1658 ret = rsa_generate_private_key(bits, &k->rsa);
1660 #endif /* WITH_OPENSSL */
1662 ret = SSH_ERR_INVALID_ARGUMENT;
1673 sshkey_cert_copy(const struct sshkey *from_key, struct sshkey *to_key)
1676 const struct sshkey_cert *from;
1677 struct sshkey_cert *to;
1678 int ret = SSH_ERR_INTERNAL_ERROR;
1680 if (to_key->cert != NULL) {
1681 cert_free(to_key->cert);
1682 to_key->cert = NULL;
1685 if ((from = from_key->cert) == NULL)
1686 return SSH_ERR_INVALID_ARGUMENT;
1688 if ((to = to_key->cert = cert_new()) == NULL)
1689 return SSH_ERR_ALLOC_FAIL;
1691 if ((ret = sshbuf_putb(to->certblob, from->certblob)) != 0 ||
1692 (ret = sshbuf_putb(to->critical, from->critical)) != 0 ||
1693 (ret = sshbuf_putb(to->extensions, from->extensions)) != 0)
1696 to->serial = from->serial;
1697 to->type = from->type;
1698 if (from->key_id == NULL)
1700 else if ((to->key_id = strdup(from->key_id)) == NULL)
1701 return SSH_ERR_ALLOC_FAIL;
1702 to->valid_after = from->valid_after;
1703 to->valid_before = from->valid_before;
1704 if (from->signature_key == NULL)
1705 to->signature_key = NULL;
1706 else if ((ret = sshkey_from_private(from->signature_key,
1707 &to->signature_key)) != 0)
1710 if (from->nprincipals > SSHKEY_CERT_MAX_PRINCIPALS)
1711 return SSH_ERR_INVALID_ARGUMENT;
1712 if (from->nprincipals > 0) {
1713 if ((to->principals = calloc(from->nprincipals,
1714 sizeof(*to->principals))) == NULL)
1715 return SSH_ERR_ALLOC_FAIL;
1716 for (i = 0; i < from->nprincipals; i++) {
1717 to->principals[i] = strdup(from->principals[i]);
1718 if (to->principals[i] == NULL) {
1719 to->nprincipals = i;
1720 return SSH_ERR_ALLOC_FAIL;
1724 to->nprincipals = from->nprincipals;
1729 sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1731 struct sshkey *n = NULL;
1732 int r = SSH_ERR_INTERNAL_ERROR;
1734 const BIGNUM *rsa_n, *rsa_e;
1735 BIGNUM *rsa_n_dup = NULL, *rsa_e_dup = NULL;
1736 const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
1737 BIGNUM *dsa_p_dup = NULL, *dsa_q_dup = NULL, *dsa_g_dup = NULL;
1738 BIGNUM *dsa_pub_key_dup = NULL;
1739 #endif /* WITH_OPENSSL */
1746 if ((n = sshkey_new(k->type)) == NULL) {
1747 r = SSH_ERR_ALLOC_FAIL;
1751 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
1752 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
1753 if ((dsa_p_dup = BN_dup(dsa_p)) == NULL ||
1754 (dsa_q_dup = BN_dup(dsa_q)) == NULL ||
1755 (dsa_g_dup = BN_dup(dsa_g)) == NULL ||
1756 (dsa_pub_key_dup = BN_dup(dsa_pub_key)) == NULL) {
1757 r = SSH_ERR_ALLOC_FAIL;
1760 if (!DSA_set0_pqg(n->dsa, dsa_p_dup, dsa_q_dup, dsa_g_dup)) {
1761 r = SSH_ERR_LIBCRYPTO_ERROR;
1764 dsa_p_dup = dsa_q_dup = dsa_g_dup = NULL; /* transferred */
1765 if (!DSA_set0_key(n->dsa, dsa_pub_key_dup, NULL)) {
1766 r = SSH_ERR_LIBCRYPTO_ERROR;
1769 dsa_pub_key_dup = NULL; /* transferred */
1772 # ifdef OPENSSL_HAS_ECC
1774 case KEY_ECDSA_CERT:
1775 if ((n = sshkey_new(k->type)) == NULL) {
1776 r = SSH_ERR_ALLOC_FAIL;
1779 n->ecdsa_nid = k->ecdsa_nid;
1780 n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
1781 if (n->ecdsa == NULL) {
1782 r = SSH_ERR_ALLOC_FAIL;
1785 if (EC_KEY_set_public_key(n->ecdsa,
1786 EC_KEY_get0_public_key(k->ecdsa)) != 1) {
1787 r = SSH_ERR_LIBCRYPTO_ERROR;
1791 # endif /* OPENSSL_HAS_ECC */
1794 if ((n = sshkey_new(k->type)) == NULL) {
1795 r = SSH_ERR_ALLOC_FAIL;
1798 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
1799 if ((rsa_n_dup = BN_dup(rsa_n)) == NULL ||
1800 (rsa_e_dup = BN_dup(rsa_e)) == NULL) {
1801 r = SSH_ERR_ALLOC_FAIL;
1804 if (!RSA_set0_key(n->rsa, rsa_n_dup, rsa_e_dup, NULL)) {
1805 r = SSH_ERR_LIBCRYPTO_ERROR;
1808 rsa_n_dup = rsa_e_dup = NULL; /* transferred */
1810 #endif /* WITH_OPENSSL */
1812 case KEY_ED25519_CERT:
1813 if ((n = sshkey_new(k->type)) == NULL) {
1814 r = SSH_ERR_ALLOC_FAIL;
1817 if (k->ed25519_pk != NULL) {
1818 if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) {
1819 r = SSH_ERR_ALLOC_FAIL;
1822 memcpy(n->ed25519_pk, k->ed25519_pk, ED25519_PK_SZ);
1828 if ((n = sshkey_new(k->type)) == NULL) {
1829 r = SSH_ERR_ALLOC_FAIL;
1832 if ((r = sshkey_xmss_init(n, k->xmss_name)) != 0)
1834 if (k->xmss_pk != NULL) {
1835 size_t pklen = sshkey_xmss_pklen(k);
1836 if (pklen == 0 || sshkey_xmss_pklen(n) != pklen) {
1837 r = SSH_ERR_INTERNAL_ERROR;
1840 if ((n->xmss_pk = malloc(pklen)) == NULL) {
1841 r = SSH_ERR_ALLOC_FAIL;
1844 memcpy(n->xmss_pk, k->xmss_pk, pklen);
1847 #endif /* WITH_XMSS */
1849 r = SSH_ERR_KEY_TYPE_UNKNOWN;
1852 if (sshkey_is_cert(k) && (r = sshkey_cert_copy(k, n)) != 0)
1861 BN_clear_free(rsa_n_dup);
1862 BN_clear_free(rsa_e_dup);
1863 BN_clear_free(dsa_p_dup);
1864 BN_clear_free(dsa_q_dup);
1865 BN_clear_free(dsa_g_dup);
1866 BN_clear_free(dsa_pub_key_dup);
1873 cert_parse(struct sshbuf *b, struct sshkey *key, struct sshbuf *certbuf)
1875 struct sshbuf *principals = NULL, *crit = NULL;
1876 struct sshbuf *exts = NULL, *ca = NULL;
1878 size_t signed_len = 0, slen = 0, kidlen = 0;
1879 int ret = SSH_ERR_INTERNAL_ERROR;
1881 /* Copy the entire key blob for verification and later serialisation */
1882 if ((ret = sshbuf_putb(key->cert->certblob, certbuf)) != 0)
1885 /* Parse body of certificate up to signature */
1886 if ((ret = sshbuf_get_u64(b, &key->cert->serial)) != 0 ||
1887 (ret = sshbuf_get_u32(b, &key->cert->type)) != 0 ||
1888 (ret = sshbuf_get_cstring(b, &key->cert->key_id, &kidlen)) != 0 ||
1889 (ret = sshbuf_froms(b, &principals)) != 0 ||
1890 (ret = sshbuf_get_u64(b, &key->cert->valid_after)) != 0 ||
1891 (ret = sshbuf_get_u64(b, &key->cert->valid_before)) != 0 ||
1892 (ret = sshbuf_froms(b, &crit)) != 0 ||
1893 (ret = sshbuf_froms(b, &exts)) != 0 ||
1894 (ret = sshbuf_get_string_direct(b, NULL, NULL)) != 0 ||
1895 (ret = sshbuf_froms(b, &ca)) != 0) {
1896 /* XXX debug print error for ret */
1897 ret = SSH_ERR_INVALID_FORMAT;
1901 /* Signature is left in the buffer so we can calculate this length */
1902 signed_len = sshbuf_len(key->cert->certblob) - sshbuf_len(b);
1904 if ((ret = sshbuf_get_string(b, &sig, &slen)) != 0) {
1905 ret = SSH_ERR_INVALID_FORMAT;
1909 if (key->cert->type != SSH2_CERT_TYPE_USER &&
1910 key->cert->type != SSH2_CERT_TYPE_HOST) {
1911 ret = SSH_ERR_KEY_CERT_UNKNOWN_TYPE;
1915 /* Parse principals section */
1916 while (sshbuf_len(principals) > 0) {
1917 char *principal = NULL;
1918 char **oprincipals = NULL;
1920 if (key->cert->nprincipals >= SSHKEY_CERT_MAX_PRINCIPALS) {
1921 ret = SSH_ERR_INVALID_FORMAT;
1924 if ((ret = sshbuf_get_cstring(principals, &principal,
1926 ret = SSH_ERR_INVALID_FORMAT;
1929 oprincipals = key->cert->principals;
1930 key->cert->principals = recallocarray(key->cert->principals,
1931 key->cert->nprincipals, key->cert->nprincipals + 1,
1932 sizeof(*key->cert->principals));
1933 if (key->cert->principals == NULL) {
1935 key->cert->principals = oprincipals;
1936 ret = SSH_ERR_ALLOC_FAIL;
1939 key->cert->principals[key->cert->nprincipals++] = principal;
1943 * Stash a copies of the critical options and extensions sections
1946 if ((ret = sshbuf_putb(key->cert->critical, crit)) != 0 ||
1948 (ret = sshbuf_putb(key->cert->extensions, exts)) != 0))
1952 * Validate critical options and extensions sections format.
1954 while (sshbuf_len(crit) != 0) {
1955 if ((ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0 ||
1956 (ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0) {
1957 sshbuf_reset(key->cert->critical);
1958 ret = SSH_ERR_INVALID_FORMAT;
1962 while (exts != NULL && sshbuf_len(exts) != 0) {
1963 if ((ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0 ||
1964 (ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0) {
1965 sshbuf_reset(key->cert->extensions);
1966 ret = SSH_ERR_INVALID_FORMAT;
1971 /* Parse CA key and check signature */
1972 if (sshkey_from_blob_internal(ca, &key->cert->signature_key, 0) != 0) {
1973 ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
1976 if (!sshkey_type_is_valid_ca(key->cert->signature_key->type)) {
1977 ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
1980 if ((ret = sshkey_verify(key->cert->signature_key, sig, slen,
1981 sshbuf_ptr(key->cert->certblob), signed_len, NULL, 0)) != 0)
1990 sshbuf_free(principals);
1997 check_rsa_length(const RSA *rsa)
1999 const BIGNUM *rsa_n;
2001 RSA_get0_key(rsa, &rsa_n, NULL, NULL);
2002 if (BN_num_bits(rsa_n) < SSH_RSA_MINIMUM_MODULUS_SIZE)
2003 return SSH_ERR_KEY_LENGTH;
2009 sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
2012 int type, ret = SSH_ERR_INTERNAL_ERROR;
2013 char *ktype = NULL, *curve = NULL, *xmss_name = NULL;
2014 struct sshkey *key = NULL;
2017 struct sshbuf *copy;
2018 #if defined(WITH_OPENSSL)
2019 BIGNUM *rsa_n = NULL, *rsa_e = NULL;
2020 BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL, *dsa_pub_key = NULL;
2021 # if defined(OPENSSL_HAS_ECC)
2023 # endif /* OPENSSL_HAS_ECC */
2024 #endif /* WITH_OPENSSL */
2026 #ifdef DEBUG_PK /* XXX */
2027 sshbuf_dump(b, stderr);
2031 if ((copy = sshbuf_fromb(b)) == NULL) {
2032 ret = SSH_ERR_ALLOC_FAIL;
2035 if (sshbuf_get_cstring(b, &ktype, NULL) != 0) {
2036 ret = SSH_ERR_INVALID_FORMAT;
2040 type = sshkey_type_from_name(ktype);
2041 if (!allow_cert && sshkey_type_is_cert(type)) {
2042 ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2049 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2050 ret = SSH_ERR_INVALID_FORMAT;
2055 if ((key = sshkey_new(type)) == NULL) {
2056 ret = SSH_ERR_ALLOC_FAIL;
2059 if ((rsa_e = BN_new()) == NULL ||
2060 (rsa_n = BN_new()) == NULL) {
2061 ret = SSH_ERR_ALLOC_FAIL;
2064 if (sshbuf_get_bignum2(b, rsa_e) != 0 ||
2065 sshbuf_get_bignum2(b, rsa_n) != 0) {
2066 ret = SSH_ERR_INVALID_FORMAT;
2069 if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, NULL)) {
2070 ret = SSH_ERR_LIBCRYPTO_ERROR;
2073 rsa_n = rsa_e = NULL; /* transferred */
2074 if ((ret = check_rsa_length(key->rsa)) != 0)
2077 RSA_print_fp(stderr, key->rsa, 8);
2082 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2083 ret = SSH_ERR_INVALID_FORMAT;
2088 if ((key = sshkey_new(type)) == NULL) {
2089 ret = SSH_ERR_ALLOC_FAIL;
2092 if ((dsa_p = BN_new()) == NULL ||
2093 (dsa_q = BN_new()) == NULL ||
2094 (dsa_g = BN_new()) == NULL ||
2095 (dsa_pub_key = BN_new()) == NULL) {
2096 ret = SSH_ERR_ALLOC_FAIL;
2099 if (sshbuf_get_bignum2(b, dsa_p) != 0 ||
2100 sshbuf_get_bignum2(b, dsa_q) != 0 ||
2101 sshbuf_get_bignum2(b, dsa_g) != 0 ||
2102 sshbuf_get_bignum2(b, dsa_pub_key) != 0) {
2103 ret = SSH_ERR_INVALID_FORMAT;
2106 if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) {
2107 ret = SSH_ERR_LIBCRYPTO_ERROR;
2110 dsa_p = dsa_q = dsa_g = NULL; /* transferred */
2111 if (!DSA_set0_key(key->dsa, dsa_pub_key, NULL)) {
2112 ret = SSH_ERR_LIBCRYPTO_ERROR;
2115 dsa_pub_key = NULL; /* transferred */
2117 DSA_print_fp(stderr, key->dsa, 8);
2120 case KEY_ECDSA_CERT:
2122 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2123 ret = SSH_ERR_INVALID_FORMAT;
2127 # ifdef OPENSSL_HAS_ECC
2129 if ((key = sshkey_new(type)) == NULL) {
2130 ret = SSH_ERR_ALLOC_FAIL;
2133 key->ecdsa_nid = sshkey_ecdsa_nid_from_name(ktype);
2134 if (sshbuf_get_cstring(b, &curve, NULL) != 0) {
2135 ret = SSH_ERR_INVALID_FORMAT;
2138 if (key->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
2139 ret = SSH_ERR_EC_CURVE_MISMATCH;
2142 EC_KEY_free(key->ecdsa);
2143 if ((key->ecdsa = EC_KEY_new_by_curve_name(key->ecdsa_nid))
2145 ret = SSH_ERR_EC_CURVE_INVALID;
2148 if ((q = EC_POINT_new(EC_KEY_get0_group(key->ecdsa))) == NULL) {
2149 ret = SSH_ERR_ALLOC_FAIL;
2152 if (sshbuf_get_ec(b, q, EC_KEY_get0_group(key->ecdsa)) != 0) {
2153 ret = SSH_ERR_INVALID_FORMAT;
2156 if (sshkey_ec_validate_public(EC_KEY_get0_group(key->ecdsa),
2158 ret = SSH_ERR_KEY_INVALID_EC_VALUE;
2161 if (EC_KEY_set_public_key(key->ecdsa, q) != 1) {
2162 /* XXX assume it is a allocation error */
2163 ret = SSH_ERR_ALLOC_FAIL;
2167 sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q);
2170 # endif /* OPENSSL_HAS_ECC */
2171 #endif /* WITH_OPENSSL */
2172 case KEY_ED25519_CERT:
2174 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2175 ret = SSH_ERR_INVALID_FORMAT;
2180 if ((ret = sshbuf_get_string(b, &pk, &len)) != 0)
2182 if (len != ED25519_PK_SZ) {
2183 ret = SSH_ERR_INVALID_FORMAT;
2186 if ((key = sshkey_new(type)) == NULL) {
2187 ret = SSH_ERR_ALLOC_FAIL;
2190 key->ed25519_pk = pk;
2196 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2197 ret = SSH_ERR_INVALID_FORMAT;
2202 if ((ret = sshbuf_get_cstring(b, &xmss_name, NULL)) != 0)
2204 if ((key = sshkey_new(type)) == NULL) {
2205 ret = SSH_ERR_ALLOC_FAIL;
2208 if ((ret = sshkey_xmss_init(key, xmss_name)) != 0)
2210 if ((ret = sshbuf_get_string(b, &pk, &len)) != 0)
2212 if (len == 0 || len != sshkey_xmss_pklen(key)) {
2213 ret = SSH_ERR_INVALID_FORMAT;
2218 if (type != KEY_XMSS_CERT &&
2219 (ret = sshkey_xmss_deserialize_pk_info(key, b)) != 0)
2222 #endif /* WITH_XMSS */
2225 ret = SSH_ERR_KEY_TYPE_UNKNOWN;
2229 /* Parse certificate potion */
2230 if (sshkey_is_cert(key) && (ret = cert_parse(b, key, copy)) != 0)
2233 if (key != NULL && sshbuf_len(b) != 0) {
2234 ret = SSH_ERR_INVALID_FORMAT;
2249 #if defined(WITH_OPENSSL)
2250 BN_clear_free(rsa_n);
2251 BN_clear_free(rsa_e);
2252 BN_clear_free(dsa_p);
2253 BN_clear_free(dsa_q);
2254 BN_clear_free(dsa_g);
2255 BN_clear_free(dsa_pub_key);
2256 # if defined(OPENSSL_HAS_ECC)
2258 # endif /* OPENSSL_HAS_ECC */
2259 #endif /* WITH_OPENSSL */
2264 sshkey_from_blob(const u_char *blob, size_t blen, struct sshkey **keyp)
2269 if ((b = sshbuf_from(blob, blen)) == NULL)
2270 return SSH_ERR_ALLOC_FAIL;
2271 r = sshkey_from_blob_internal(b, keyp, 1);
2277 sshkey_fromb(struct sshbuf *b, struct sshkey **keyp)
2279 return sshkey_from_blob_internal(b, keyp, 1);
2283 sshkey_froms(struct sshbuf *buf, struct sshkey **keyp)
2288 if ((r = sshbuf_froms(buf, &b)) != 0)
2290 r = sshkey_from_blob_internal(b, keyp, 1);
2296 get_sigtype(const u_char *sig, size_t siglen, char **sigtypep)
2299 struct sshbuf *b = NULL;
2300 char *sigtype = NULL;
2302 if (sigtypep != NULL)
2304 if ((b = sshbuf_from(sig, siglen)) == NULL)
2305 return SSH_ERR_ALLOC_FAIL;
2306 if ((r = sshbuf_get_cstring(b, &sigtype, NULL)) != 0)
2309 if (sigtypep != NULL) {
2310 *sigtypep = sigtype;
2321 * Returns the expected signature algorithm for a given public key algorithm.
2324 sshkey_sigalg_by_name(const char *name)
2326 const struct keytype *kt;
2328 for (kt = keytypes; kt->type != -1; kt++) {
2329 if (strcmp(kt->name, name) != 0)
2331 if (kt->sigalg != NULL)
2335 return sshkey_ssh_name_from_type_nid(
2336 sshkey_type_plain(kt->type), kt->nid);
2342 * Verifies that the signature algorithm appearing inside the signature blob
2343 * matches that which was requested.
2346 sshkey_check_sigtype(const u_char *sig, size_t siglen,
2347 const char *requested_alg)
2349 const char *expected_alg;
2350 char *sigtype = NULL;
2353 if (requested_alg == NULL)
2355 if ((expected_alg = sshkey_sigalg_by_name(requested_alg)) == NULL)
2356 return SSH_ERR_INVALID_ARGUMENT;
2357 if ((r = get_sigtype(sig, siglen, &sigtype)) != 0)
2359 r = strcmp(expected_alg, sigtype) == 0;
2361 return r ? 0 : SSH_ERR_SIGN_ALG_UNSUPPORTED;
2365 sshkey_sign(const struct sshkey *key,
2366 u_char **sigp, size_t *lenp,
2367 const u_char *data, size_t datalen, const char *alg, u_int compat)
2373 if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2374 return SSH_ERR_INVALID_ARGUMENT;
2375 switch (key->type) {
2379 return ssh_dss_sign(key, sigp, lenp, data, datalen, compat);
2380 # ifdef OPENSSL_HAS_ECC
2381 case KEY_ECDSA_CERT:
2383 return ssh_ecdsa_sign(key, sigp, lenp, data, datalen, compat);
2384 # endif /* OPENSSL_HAS_ECC */
2387 return ssh_rsa_sign(key, sigp, lenp, data, datalen, alg);
2388 #endif /* WITH_OPENSSL */
2390 case KEY_ED25519_CERT:
2391 return ssh_ed25519_sign(key, sigp, lenp, data, datalen, compat);
2395 return ssh_xmss_sign(key, sigp, lenp, data, datalen, compat);
2396 #endif /* WITH_XMSS */
2398 return SSH_ERR_KEY_TYPE_UNKNOWN;
2403 * ssh_key_verify returns 0 for a correct signature and < 0 on error.
2404 * If "alg" specified, then the signature must use that algorithm.
2407 sshkey_verify(const struct sshkey *key,
2408 const u_char *sig, size_t siglen,
2409 const u_char *data, size_t dlen, const char *alg, u_int compat)
2411 if (siglen == 0 || dlen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2412 return SSH_ERR_INVALID_ARGUMENT;
2413 switch (key->type) {
2417 return ssh_dss_verify(key, sig, siglen, data, dlen, compat);
2418 # ifdef OPENSSL_HAS_ECC
2419 case KEY_ECDSA_CERT:
2421 return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat);
2422 # endif /* OPENSSL_HAS_ECC */
2425 return ssh_rsa_verify(key, sig, siglen, data, dlen, alg);
2426 #endif /* WITH_OPENSSL */
2428 case KEY_ED25519_CERT:
2429 return ssh_ed25519_verify(key, sig, siglen, data, dlen, compat);
2433 return ssh_xmss_verify(key, sig, siglen, data, dlen, compat);
2434 #endif /* WITH_XMSS */
2436 return SSH_ERR_KEY_TYPE_UNKNOWN;
2440 /* Convert a plain key to their _CERT equivalent */
2442 sshkey_to_certified(struct sshkey *k)
2449 newtype = KEY_RSA_CERT;
2452 newtype = KEY_DSA_CERT;
2455 newtype = KEY_ECDSA_CERT;
2457 #endif /* WITH_OPENSSL */
2459 newtype = KEY_ED25519_CERT;
2463 newtype = KEY_XMSS_CERT;
2465 #endif /* WITH_XMSS */
2467 return SSH_ERR_INVALID_ARGUMENT;
2469 if ((k->cert = cert_new()) == NULL)
2470 return SSH_ERR_ALLOC_FAIL;
2475 /* Convert a certificate to its raw key equivalent */
2477 sshkey_drop_cert(struct sshkey *k)
2479 if (!sshkey_type_is_cert(k->type))
2480 return SSH_ERR_KEY_TYPE_UNKNOWN;
2483 k->type = sshkey_type_plain(k->type);
2487 /* Sign a certified key, (re-)generating the signed certblob. */
2489 sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
2490 sshkey_certify_signer *signer, void *signer_ctx)
2492 struct sshbuf *principals = NULL;
2493 u_char *ca_blob = NULL, *sig_blob = NULL, nonce[32];
2494 size_t i, ca_len, sig_len;
2495 int ret = SSH_ERR_INTERNAL_ERROR;
2496 struct sshbuf *cert;
2498 const BIGNUM *rsa_n, *rsa_e, *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
2499 #endif /* WITH_OPENSSL */
2501 if (k == NULL || k->cert == NULL ||
2502 k->cert->certblob == NULL || ca == NULL)
2503 return SSH_ERR_INVALID_ARGUMENT;
2504 if (!sshkey_is_cert(k))
2505 return SSH_ERR_KEY_TYPE_UNKNOWN;
2506 if (!sshkey_type_is_valid_ca(ca->type))
2507 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2509 if ((ret = sshkey_to_blob(ca, &ca_blob, &ca_len)) != 0)
2510 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2512 cert = k->cert->certblob; /* for readability */
2514 if ((ret = sshbuf_put_cstring(cert, sshkey_ssh_name(k))) != 0)
2517 /* -v01 certs put nonce first */
2518 arc4random_buf(&nonce, sizeof(nonce));
2519 if ((ret = sshbuf_put_string(cert, nonce, sizeof(nonce))) != 0)
2522 /* XXX this substantially duplicates to_blob(); refactor */
2526 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
2527 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
2528 if ((ret = sshbuf_put_bignum2(cert, dsa_p)) != 0 ||
2529 (ret = sshbuf_put_bignum2(cert, dsa_q)) != 0 ||
2530 (ret = sshbuf_put_bignum2(cert, dsa_g)) != 0 ||
2531 (ret = sshbuf_put_bignum2(cert, dsa_pub_key)) != 0)
2534 # ifdef OPENSSL_HAS_ECC
2535 case KEY_ECDSA_CERT:
2536 if ((ret = sshbuf_put_cstring(cert,
2537 sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 ||
2538 (ret = sshbuf_put_ec(cert,
2539 EC_KEY_get0_public_key(k->ecdsa),
2540 EC_KEY_get0_group(k->ecdsa))) != 0)
2543 # endif /* OPENSSL_HAS_ECC */
2545 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
2546 if ((ret = sshbuf_put_bignum2(cert, rsa_e)) != 0 ||
2547 (ret = sshbuf_put_bignum2(cert, rsa_n)) != 0)
2550 #endif /* WITH_OPENSSL */
2551 case KEY_ED25519_CERT:
2552 if ((ret = sshbuf_put_string(cert,
2553 k->ed25519_pk, ED25519_PK_SZ)) != 0)
2558 if (k->xmss_name == NULL) {
2559 ret = SSH_ERR_INVALID_ARGUMENT;
2562 if ((ret = sshbuf_put_cstring(cert, k->xmss_name)) ||
2563 (ret = sshbuf_put_string(cert,
2564 k->xmss_pk, sshkey_xmss_pklen(k))) != 0)
2567 #endif /* WITH_XMSS */
2569 ret = SSH_ERR_INVALID_ARGUMENT;
2573 if ((ret = sshbuf_put_u64(cert, k->cert->serial)) != 0 ||
2574 (ret = sshbuf_put_u32(cert, k->cert->type)) != 0 ||
2575 (ret = sshbuf_put_cstring(cert, k->cert->key_id)) != 0)
2578 if ((principals = sshbuf_new()) == NULL) {
2579 ret = SSH_ERR_ALLOC_FAIL;
2582 for (i = 0; i < k->cert->nprincipals; i++) {
2583 if ((ret = sshbuf_put_cstring(principals,
2584 k->cert->principals[i])) != 0)
2587 if ((ret = sshbuf_put_stringb(cert, principals)) != 0 ||
2588 (ret = sshbuf_put_u64(cert, k->cert->valid_after)) != 0 ||
2589 (ret = sshbuf_put_u64(cert, k->cert->valid_before)) != 0 ||
2590 (ret = sshbuf_put_stringb(cert, k->cert->critical)) != 0 ||
2591 (ret = sshbuf_put_stringb(cert, k->cert->extensions)) != 0 ||
2592 (ret = sshbuf_put_string(cert, NULL, 0)) != 0 || /* Reserved */
2593 (ret = sshbuf_put_string(cert, ca_blob, ca_len)) != 0)
2596 /* Sign the whole mess */
2597 if ((ret = signer(ca, &sig_blob, &sig_len, sshbuf_ptr(cert),
2598 sshbuf_len(cert), alg, 0, signer_ctx)) != 0)
2601 /* Append signature and we are done */
2602 if ((ret = sshbuf_put_string(cert, sig_blob, sig_len)) != 0)
2610 sshbuf_free(principals);
2615 default_key_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
2616 const u_char *data, size_t datalen,
2617 const char *alg, u_int compat, void *ctx)
2620 return SSH_ERR_INVALID_ARGUMENT;
2621 return sshkey_sign(key, sigp, lenp, data, datalen, alg, compat);
2625 sshkey_certify(struct sshkey *k, struct sshkey *ca, const char *alg)
2627 return sshkey_certify_custom(k, ca, alg, default_key_sign, NULL);
2631 sshkey_cert_check_authority(const struct sshkey *k,
2632 int want_host, int require_principal,
2633 const char *name, const char **reason)
2635 u_int i, principal_matches;
2636 time_t now = time(NULL);
2642 if (k->cert->type != SSH2_CERT_TYPE_HOST) {
2643 *reason = "Certificate invalid: not a host certificate";
2644 return SSH_ERR_KEY_CERT_INVALID;
2647 if (k->cert->type != SSH2_CERT_TYPE_USER) {
2648 *reason = "Certificate invalid: not a user certificate";
2649 return SSH_ERR_KEY_CERT_INVALID;
2653 /* yikes - system clock before epoch! */
2654 *reason = "Certificate invalid: not yet valid";
2655 return SSH_ERR_KEY_CERT_INVALID;
2657 if ((u_int64_t)now < k->cert->valid_after) {
2658 *reason = "Certificate invalid: not yet valid";
2659 return SSH_ERR_KEY_CERT_INVALID;
2661 if ((u_int64_t)now >= k->cert->valid_before) {
2662 *reason = "Certificate invalid: expired";
2663 return SSH_ERR_KEY_CERT_INVALID;
2665 if (k->cert->nprincipals == 0) {
2666 if (require_principal) {
2667 *reason = "Certificate lacks principal list";
2668 return SSH_ERR_KEY_CERT_INVALID;
2670 } else if (name != NULL) {
2671 principal_matches = 0;
2672 for (i = 0; i < k->cert->nprincipals; i++) {
2673 if (strcmp(name, k->cert->principals[i]) == 0) {
2674 principal_matches = 1;
2678 if (!principal_matches) {
2679 *reason = "Certificate invalid: name is not a listed "
2681 return SSH_ERR_KEY_CERT_INVALID;
2688 sshkey_format_cert_validity(const struct sshkey_cert *cert, char *s, size_t l)
2690 char from[32], to[32], ret[64];
2695 if (cert->valid_after == 0 &&
2696 cert->valid_before == 0xffffffffffffffffULL)
2697 return strlcpy(s, "forever", l);
2699 if (cert->valid_after != 0) {
2700 /* XXX revisit INT_MAX in 2038 :) */
2701 tt = cert->valid_after > INT_MAX ?
2702 INT_MAX : cert->valid_after;
2703 tm = localtime(&tt);
2704 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
2706 if (cert->valid_before != 0xffffffffffffffffULL) {
2707 /* XXX revisit INT_MAX in 2038 :) */
2708 tt = cert->valid_before > INT_MAX ?
2709 INT_MAX : cert->valid_before;
2710 tm = localtime(&tt);
2711 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
2714 if (cert->valid_after == 0)
2715 snprintf(ret, sizeof(ret), "before %s", to);
2716 else if (cert->valid_before == 0xffffffffffffffffULL)
2717 snprintf(ret, sizeof(ret), "after %s", from);
2719 snprintf(ret, sizeof(ret), "from %s to %s", from, to);
2721 return strlcpy(s, ret, l);
2725 sshkey_private_serialize_opt(const struct sshkey *key, struct sshbuf *b,
2726 enum sshkey_serialize_rep opts)
2728 int r = SSH_ERR_INTERNAL_ERROR;
2730 const BIGNUM *rsa_n, *rsa_e, *rsa_d, *rsa_iqmp, *rsa_p, *rsa_q;
2731 const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key, *dsa_priv_key;
2732 #endif /* WITH_OPENSSL */
2734 if ((r = sshbuf_put_cstring(b, sshkey_ssh_name(key))) != 0)
2736 switch (key->type) {
2739 RSA_get0_key(key->rsa, &rsa_n, &rsa_e, &rsa_d);
2740 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2741 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2742 if ((r = sshbuf_put_bignum2(b, rsa_n)) != 0 ||
2743 (r = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
2744 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2745 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2746 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2747 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2751 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2752 r = SSH_ERR_INVALID_ARGUMENT;
2755 RSA_get0_key(key->rsa, NULL, NULL, &rsa_d);
2756 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2757 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2758 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2759 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2760 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2761 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2762 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2766 DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
2767 DSA_get0_key(key->dsa, &dsa_pub_key, &dsa_priv_key);
2768 if ((r = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
2769 (r = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
2770 (r = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
2771 (r = sshbuf_put_bignum2(b, dsa_pub_key)) != 0 ||
2772 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2776 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2777 r = SSH_ERR_INVALID_ARGUMENT;
2780 DSA_get0_key(key->dsa, NULL, &dsa_priv_key);
2781 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2782 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2785 # ifdef OPENSSL_HAS_ECC
2787 if ((r = sshbuf_put_cstring(b,
2788 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
2789 (r = sshbuf_put_eckey(b, key->ecdsa)) != 0 ||
2790 (r = sshbuf_put_bignum2(b,
2791 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2794 case KEY_ECDSA_CERT:
2795 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2796 r = SSH_ERR_INVALID_ARGUMENT;
2799 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2800 (r = sshbuf_put_bignum2(b,
2801 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2804 # endif /* OPENSSL_HAS_ECC */
2805 #endif /* WITH_OPENSSL */
2807 if ((r = sshbuf_put_string(b, key->ed25519_pk,
2808 ED25519_PK_SZ)) != 0 ||
2809 (r = sshbuf_put_string(b, key->ed25519_sk,
2810 ED25519_SK_SZ)) != 0)
2813 case KEY_ED25519_CERT:
2814 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2815 r = SSH_ERR_INVALID_ARGUMENT;
2818 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2819 (r = sshbuf_put_string(b, key->ed25519_pk,
2820 ED25519_PK_SZ)) != 0 ||
2821 (r = sshbuf_put_string(b, key->ed25519_sk,
2822 ED25519_SK_SZ)) != 0)
2827 if (key->xmss_name == NULL) {
2828 r = SSH_ERR_INVALID_ARGUMENT;
2831 if ((r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2832 (r = sshbuf_put_string(b, key->xmss_pk,
2833 sshkey_xmss_pklen(key))) != 0 ||
2834 (r = sshbuf_put_string(b, key->xmss_sk,
2835 sshkey_xmss_sklen(key))) != 0 ||
2836 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2840 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0 ||
2841 key->xmss_name == NULL) {
2842 r = SSH_ERR_INVALID_ARGUMENT;
2845 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2846 (r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2847 (r = sshbuf_put_string(b, key->xmss_pk,
2848 sshkey_xmss_pklen(key))) != 0 ||
2849 (r = sshbuf_put_string(b, key->xmss_sk,
2850 sshkey_xmss_sklen(key))) != 0 ||
2851 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2854 #endif /* WITH_XMSS */
2856 r = SSH_ERR_INVALID_ARGUMENT;
2866 sshkey_private_serialize(const struct sshkey *key, struct sshbuf *b)
2868 return sshkey_private_serialize_opt(key, b,
2869 SSHKEY_SERIALIZE_DEFAULT);
2873 sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
2875 char *tname = NULL, *curve = NULL, *xmss_name = NULL;
2876 struct sshkey *k = NULL;
2877 size_t pklen = 0, sklen = 0;
2878 int type, r = SSH_ERR_INTERNAL_ERROR;
2879 u_char *ed25519_pk = NULL, *ed25519_sk = NULL;
2880 u_char *xmss_pk = NULL, *xmss_sk = NULL;
2882 BIGNUM *exponent = NULL;
2883 BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
2884 BIGNUM *rsa_iqmp = NULL, *rsa_p = NULL, *rsa_q = NULL;
2885 BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
2886 BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
2887 #endif /* WITH_OPENSSL */
2891 if ((r = sshbuf_get_cstring(buf, &tname, NULL)) != 0)
2893 type = sshkey_type_from_name(tname);
2897 if ((k = sshkey_new_private(type)) == NULL) {
2898 r = SSH_ERR_ALLOC_FAIL;
2901 if ((dsa_p = BN_new()) == NULL ||
2902 (dsa_q = BN_new()) == NULL ||
2903 (dsa_g = BN_new()) == NULL ||
2904 (dsa_pub_key = BN_new()) == NULL ||
2905 (dsa_priv_key = BN_new()) == NULL) {
2906 r = SSH_ERR_ALLOC_FAIL;
2909 if ((r = sshbuf_get_bignum2(buf, dsa_p)) != 0 ||
2910 (r = sshbuf_get_bignum2(buf, dsa_q)) != 0 ||
2911 (r = sshbuf_get_bignum2(buf, dsa_g)) != 0 ||
2912 (r = sshbuf_get_bignum2(buf, dsa_pub_key)) != 0 ||
2913 (r = sshbuf_get_bignum2(buf, dsa_priv_key)) != 0)
2915 if (!DSA_set0_pqg(k->dsa, dsa_p, dsa_q, dsa_g)) {
2916 r = SSH_ERR_LIBCRYPTO_ERROR;
2919 dsa_p = dsa_q = dsa_g = NULL; /* transferred */
2920 if (!DSA_set0_key(k->dsa, dsa_pub_key, dsa_priv_key)) {
2921 r = SSH_ERR_LIBCRYPTO_ERROR;
2924 dsa_pub_key = dsa_priv_key = NULL; /* transferred */
2927 if ((dsa_priv_key = BN_new()) == NULL) {
2928 r = SSH_ERR_ALLOC_FAIL;
2931 if ((r = sshkey_froms(buf, &k)) != 0 ||
2932 (r = sshbuf_get_bignum2(buf, dsa_priv_key)) != 0)
2934 if (!DSA_set0_key(k->dsa, NULL, dsa_priv_key)) {
2935 r = SSH_ERR_LIBCRYPTO_ERROR;
2938 dsa_priv_key = NULL; /* transferred */
2940 # ifdef OPENSSL_HAS_ECC
2942 if ((k = sshkey_new_private(type)) == NULL) {
2943 r = SSH_ERR_ALLOC_FAIL;
2946 if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) {
2947 r = SSH_ERR_INVALID_ARGUMENT;
2950 if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0)
2952 if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
2953 r = SSH_ERR_EC_CURVE_MISMATCH;
2956 k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
2957 if (k->ecdsa == NULL || (exponent = BN_new()) == NULL) {
2958 r = SSH_ERR_LIBCRYPTO_ERROR;
2961 if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 ||
2962 (r = sshbuf_get_bignum2(buf, exponent)))
2964 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
2965 r = SSH_ERR_LIBCRYPTO_ERROR;
2968 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
2969 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
2970 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
2973 case KEY_ECDSA_CERT:
2974 if ((exponent = BN_new()) == NULL) {
2975 r = SSH_ERR_LIBCRYPTO_ERROR;
2978 if ((r = sshkey_froms(buf, &k)) != 0 ||
2979 (r = sshbuf_get_bignum2(buf, exponent)) != 0)
2981 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
2982 r = SSH_ERR_LIBCRYPTO_ERROR;
2985 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
2986 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
2987 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
2990 # endif /* OPENSSL_HAS_ECC */
2992 if ((k = sshkey_new_private(type)) == NULL) {
2993 r = SSH_ERR_ALLOC_FAIL;
2996 if ((rsa_n = BN_new()) == NULL ||
2997 (rsa_e = BN_new()) == NULL ||
2998 (rsa_d = BN_new()) == NULL ||
2999 (rsa_iqmp = BN_new()) == NULL ||
3000 (rsa_p = BN_new()) == NULL ||
3001 (rsa_q = BN_new()) == NULL) {
3002 r = SSH_ERR_ALLOC_FAIL;
3005 if ((r = sshbuf_get_bignum2(buf, rsa_n)) != 0 ||
3006 (r = sshbuf_get_bignum2(buf, rsa_e)) != 0 ||
3007 (r = sshbuf_get_bignum2(buf, rsa_d)) != 0 ||
3008 (r = sshbuf_get_bignum2(buf, rsa_iqmp)) != 0 ||
3009 (r = sshbuf_get_bignum2(buf, rsa_p)) != 0 ||
3010 (r = sshbuf_get_bignum2(buf, rsa_q)) != 0)
3012 if (!RSA_set0_key(k->rsa, rsa_n, rsa_e, rsa_d)) {
3013 r = SSH_ERR_LIBCRYPTO_ERROR;
3016 rsa_n = rsa_e = rsa_d = NULL; /* transferred */
3017 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3018 r = SSH_ERR_LIBCRYPTO_ERROR;
3021 rsa_p = rsa_q = NULL; /* transferred */
3022 if ((r = check_rsa_length(k->rsa)) != 0)
3024 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3028 if ((rsa_d = BN_new()) == NULL ||
3029 (rsa_iqmp = BN_new()) == NULL ||
3030 (rsa_p = BN_new()) == NULL ||
3031 (rsa_q = BN_new()) == NULL) {
3032 r = SSH_ERR_ALLOC_FAIL;
3035 if ((r = sshkey_froms(buf, &k)) != 0 ||
3036 (r = sshbuf_get_bignum2(buf, rsa_d)) != 0 ||
3037 (r = sshbuf_get_bignum2(buf, rsa_iqmp)) != 0 ||
3038 (r = sshbuf_get_bignum2(buf, rsa_p)) != 0 ||
3039 (r = sshbuf_get_bignum2(buf, rsa_q)) != 0)
3041 if (!RSA_set0_key(k->rsa, NULL, NULL, rsa_d)) {
3042 r = SSH_ERR_LIBCRYPTO_ERROR;
3045 rsa_d = NULL; /* transferred */
3046 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3047 r = SSH_ERR_LIBCRYPTO_ERROR;
3050 rsa_p = rsa_q = NULL; /* transferred */
3051 if ((r = check_rsa_length(k->rsa)) != 0)
3053 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3056 #endif /* WITH_OPENSSL */
3058 if ((k = sshkey_new_private(type)) == NULL) {
3059 r = SSH_ERR_ALLOC_FAIL;
3062 if ((r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3063 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3065 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3066 r = SSH_ERR_INVALID_FORMAT;
3069 k->ed25519_pk = ed25519_pk;
3070 k->ed25519_sk = ed25519_sk;
3071 ed25519_pk = ed25519_sk = NULL;
3073 case KEY_ED25519_CERT:
3074 if ((r = sshkey_froms(buf, &k)) != 0 ||
3075 (r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3076 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3078 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3079 r = SSH_ERR_INVALID_FORMAT;
3082 k->ed25519_pk = ed25519_pk;
3083 k->ed25519_sk = ed25519_sk;
3084 ed25519_pk = ed25519_sk = NULL;
3088 if ((k = sshkey_new_private(type)) == NULL) {
3089 r = SSH_ERR_ALLOC_FAIL;
3092 if ((r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3093 (r = sshkey_xmss_init(k, xmss_name)) != 0 ||
3094 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3095 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3097 if (pklen != sshkey_xmss_pklen(k) ||
3098 sklen != sshkey_xmss_sklen(k)) {
3099 r = SSH_ERR_INVALID_FORMAT;
3102 k->xmss_pk = xmss_pk;
3103 k->xmss_sk = xmss_sk;
3104 xmss_pk = xmss_sk = NULL;
3105 /* optional internal state */
3106 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3110 if ((r = sshkey_froms(buf, &k)) != 0 ||
3111 (r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3112 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3113 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3115 if (strcmp(xmss_name, k->xmss_name)) {
3116 r = SSH_ERR_INVALID_FORMAT;
3119 if (pklen != sshkey_xmss_pklen(k) ||
3120 sklen != sshkey_xmss_sklen(k)) {
3121 r = SSH_ERR_INVALID_FORMAT;
3124 k->xmss_pk = xmss_pk;
3125 k->xmss_sk = xmss_sk;
3126 xmss_pk = xmss_sk = NULL;
3127 /* optional internal state */
3128 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3131 #endif /* WITH_XMSS */
3133 r = SSH_ERR_KEY_TYPE_UNKNOWN;
3137 /* enable blinding */
3141 if (RSA_blinding_on(k->rsa, NULL) != 1) {
3142 r = SSH_ERR_LIBCRYPTO_ERROR;
3147 #endif /* WITH_OPENSSL */
3158 BN_clear_free(exponent);
3159 BN_clear_free(dsa_p);
3160 BN_clear_free(dsa_q);
3161 BN_clear_free(dsa_g);
3162 BN_clear_free(dsa_pub_key);
3163 BN_clear_free(dsa_priv_key);
3164 BN_clear_free(rsa_n);
3165 BN_clear_free(rsa_e);
3166 BN_clear_free(rsa_d);
3167 BN_clear_free(rsa_p);
3168 BN_clear_free(rsa_q);
3169 BN_clear_free(rsa_iqmp);
3170 #endif /* WITH_OPENSSL */
3172 freezero(ed25519_pk, pklen);
3173 freezero(ed25519_sk, sklen);
3175 freezero(xmss_pk, pklen);
3176 freezero(xmss_sk, sklen);
3180 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
3182 sshkey_ec_validate_public(const EC_GROUP *group, const EC_POINT *public)
3185 EC_POINT *nq = NULL;
3186 BIGNUM *order, *x, *y, *tmp;
3187 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3190 * NB. This assumes OpenSSL has already verified that the public
3191 * point lies on the curve. This is done by EC_POINT_oct2point()
3192 * implicitly calling EC_POINT_is_on_curve(). If this code is ever
3193 * reachable with public points not unmarshalled using
3194 * EC_POINT_oct2point then the caller will need to explicitly check.
3197 if ((bnctx = BN_CTX_new()) == NULL)
3198 return SSH_ERR_ALLOC_FAIL;
3199 BN_CTX_start(bnctx);
3202 * We shouldn't ever hit this case because bignum_get_ecpoint()
3203 * refuses to load GF2m points.
3205 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3206 NID_X9_62_prime_field)
3210 if (EC_POINT_is_at_infinity(group, public))
3213 if ((x = BN_CTX_get(bnctx)) == NULL ||
3214 (y = BN_CTX_get(bnctx)) == NULL ||
3215 (order = BN_CTX_get(bnctx)) == NULL ||
3216 (tmp = BN_CTX_get(bnctx)) == NULL) {
3217 ret = SSH_ERR_ALLOC_FAIL;
3221 /* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */
3222 if (EC_GROUP_get_order(group, order, bnctx) != 1 ||
3223 EC_POINT_get_affine_coordinates_GFp(group, public,
3224 x, y, bnctx) != 1) {
3225 ret = SSH_ERR_LIBCRYPTO_ERROR;
3228 if (BN_num_bits(x) <= BN_num_bits(order) / 2 ||
3229 BN_num_bits(y) <= BN_num_bits(order) / 2)
3232 /* nQ == infinity (n == order of subgroup) */
3233 if ((nq = EC_POINT_new(group)) == NULL) {
3234 ret = SSH_ERR_ALLOC_FAIL;
3237 if (EC_POINT_mul(group, nq, NULL, public, order, bnctx) != 1) {
3238 ret = SSH_ERR_LIBCRYPTO_ERROR;
3241 if (EC_POINT_is_at_infinity(group, nq) != 1)
3244 /* x < order - 1, y < order - 1 */
3245 if (!BN_sub(tmp, order, BN_value_one())) {
3246 ret = SSH_ERR_LIBCRYPTO_ERROR;
3249 if (BN_cmp(x, tmp) >= 0 || BN_cmp(y, tmp) >= 0)
3259 sshkey_ec_validate_private(const EC_KEY *key)
3262 BIGNUM *order, *tmp;
3263 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3265 if ((bnctx = BN_CTX_new()) == NULL)
3266 return SSH_ERR_ALLOC_FAIL;
3267 BN_CTX_start(bnctx);
3269 if ((order = BN_CTX_get(bnctx)) == NULL ||
3270 (tmp = BN_CTX_get(bnctx)) == NULL) {
3271 ret = SSH_ERR_ALLOC_FAIL;
3275 /* log2(private) > log2(order)/2 */
3276 if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, bnctx) != 1) {
3277 ret = SSH_ERR_LIBCRYPTO_ERROR;
3280 if (BN_num_bits(EC_KEY_get0_private_key(key)) <=
3281 BN_num_bits(order) / 2)
3284 /* private < order - 1 */
3285 if (!BN_sub(tmp, order, BN_value_one())) {
3286 ret = SSH_ERR_LIBCRYPTO_ERROR;
3289 if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0)
3298 sshkey_dump_ec_point(const EC_GROUP *group, const EC_POINT *point)
3303 if (point == NULL) {
3304 fputs("point=(NULL)\n", stderr);
3307 if ((bnctx = BN_CTX_new()) == NULL) {
3308 fprintf(stderr, "%s: BN_CTX_new failed\n", __func__);
3311 BN_CTX_start(bnctx);
3312 if ((x = BN_CTX_get(bnctx)) == NULL ||
3313 (y = BN_CTX_get(bnctx)) == NULL) {
3314 fprintf(stderr, "%s: BN_CTX_get failed\n", __func__);
3317 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3318 NID_X9_62_prime_field) {
3319 fprintf(stderr, "%s: group is not a prime field\n", __func__);
3322 if (EC_POINT_get_affine_coordinates_GFp(group, point, x, y,
3324 fprintf(stderr, "%s: EC_POINT_get_affine_coordinates_GFp\n",
3328 fputs("x=", stderr);
3329 BN_print_fp(stderr, x);
3330 fputs("\ny=", stderr);
3331 BN_print_fp(stderr, y);
3332 fputs("\n", stderr);
3337 sshkey_dump_ec_key(const EC_KEY *key)
3339 const BIGNUM *exponent;
3341 sshkey_dump_ec_point(EC_KEY_get0_group(key),
3342 EC_KEY_get0_public_key(key));
3343 fputs("exponent=", stderr);
3344 if ((exponent = EC_KEY_get0_private_key(key)) == NULL)
3345 fputs("(NULL)", stderr);
3347 BN_print_fp(stderr, EC_KEY_get0_private_key(key));
3348 fputs("\n", stderr);
3350 #endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */
3353 sshkey_private_to_blob2(const struct sshkey *prv, struct sshbuf *blob,
3354 const char *passphrase, const char *comment, const char *ciphername,
3357 u_char *cp, *key = NULL, *pubkeyblob = NULL;
3358 u_char salt[SALT_LEN];
3360 size_t i, pubkeylen, keylen, ivlen, blocksize, authlen;
3362 int r = SSH_ERR_INTERNAL_ERROR;
3363 struct sshcipher_ctx *ciphercontext = NULL;
3364 const struct sshcipher *cipher;
3365 const char *kdfname = KDFNAME;
3366 struct sshbuf *encoded = NULL, *encrypted = NULL, *kdf = NULL;
3369 rounds = DEFAULT_ROUNDS;
3370 if (passphrase == NULL || !strlen(passphrase)) {
3371 ciphername = "none";
3373 } else if (ciphername == NULL)
3374 ciphername = DEFAULT_CIPHERNAME;
3375 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3376 r = SSH_ERR_INVALID_ARGUMENT;
3380 if ((kdf = sshbuf_new()) == NULL ||
3381 (encoded = sshbuf_new()) == NULL ||
3382 (encrypted = sshbuf_new()) == NULL) {
3383 r = SSH_ERR_ALLOC_FAIL;
3386 blocksize = cipher_blocksize(cipher);
3387 keylen = cipher_keylen(cipher);
3388 ivlen = cipher_ivlen(cipher);
3389 authlen = cipher_authlen(cipher);
3390 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3391 r = SSH_ERR_ALLOC_FAIL;
3394 if (strcmp(kdfname, "bcrypt") == 0) {
3395 arc4random_buf(salt, SALT_LEN);
3396 if (bcrypt_pbkdf(passphrase, strlen(passphrase),
3397 salt, SALT_LEN, key, keylen + ivlen, rounds) < 0) {
3398 r = SSH_ERR_INVALID_ARGUMENT;
3401 if ((r = sshbuf_put_string(kdf, salt, SALT_LEN)) != 0 ||
3402 (r = sshbuf_put_u32(kdf, rounds)) != 0)
3404 } else if (strcmp(kdfname, "none") != 0) {
3405 /* Unsupported KDF type */
3406 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3409 if ((r = cipher_init(&ciphercontext, cipher, key, keylen,
3410 key + keylen, ivlen, 1)) != 0)
3413 if ((r = sshbuf_put(encoded, AUTH_MAGIC, sizeof(AUTH_MAGIC))) != 0 ||
3414 (r = sshbuf_put_cstring(encoded, ciphername)) != 0 ||
3415 (r = sshbuf_put_cstring(encoded, kdfname)) != 0 ||
3416 (r = sshbuf_put_stringb(encoded, kdf)) != 0 ||
3417 (r = sshbuf_put_u32(encoded, 1)) != 0 || /* number of keys */
3418 (r = sshkey_to_blob(prv, &pubkeyblob, &pubkeylen)) != 0 ||
3419 (r = sshbuf_put_string(encoded, pubkeyblob, pubkeylen)) != 0)
3422 /* set up the buffer that will be encrypted */
3424 /* Random check bytes */
3425 check = arc4random();
3426 if ((r = sshbuf_put_u32(encrypted, check)) != 0 ||
3427 (r = sshbuf_put_u32(encrypted, check)) != 0)
3430 /* append private key and comment*/
3431 if ((r = sshkey_private_serialize_opt(prv, encrypted,
3432 SSHKEY_SERIALIZE_FULL)) != 0 ||
3433 (r = sshbuf_put_cstring(encrypted, comment)) != 0)
3438 while (sshbuf_len(encrypted) % blocksize) {
3439 if ((r = sshbuf_put_u8(encrypted, ++i & 0xff)) != 0)
3443 /* length in destination buffer */
3444 if ((r = sshbuf_put_u32(encoded, sshbuf_len(encrypted))) != 0)
3448 if ((r = sshbuf_reserve(encoded,
3449 sshbuf_len(encrypted) + authlen, &cp)) != 0)
3451 if ((r = cipher_crypt(ciphercontext, 0, cp,
3452 sshbuf_ptr(encrypted), sshbuf_len(encrypted), 0, authlen)) != 0)
3456 if ((b64 = sshbuf_dtob64(encoded)) == NULL) {
3457 r = SSH_ERR_ALLOC_FAIL;
3462 if ((r = sshbuf_put(blob, MARK_BEGIN, MARK_BEGIN_LEN)) != 0)
3464 for (i = 0; i < strlen(b64); i++) {
3465 if ((r = sshbuf_put_u8(blob, b64[i])) != 0)
3467 /* insert line breaks */
3468 if (i % 70 == 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3471 if (i % 70 != 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3473 if ((r = sshbuf_put(blob, MARK_END, MARK_END_LEN)) != 0)
3481 sshbuf_free(encoded);
3482 sshbuf_free(encrypted);
3483 cipher_free(ciphercontext);
3484 explicit_bzero(salt, sizeof(salt));
3486 explicit_bzero(key, keylen + ivlen);
3489 if (pubkeyblob != NULL) {
3490 explicit_bzero(pubkeyblob, pubkeylen);
3494 explicit_bzero(b64, strlen(b64));
3501 sshkey_parse_private2(struct sshbuf *blob, int type, const char *passphrase,
3502 struct sshkey **keyp, char **commentp)
3504 char *comment = NULL, *ciphername = NULL, *kdfname = NULL;
3505 const struct sshcipher *cipher = NULL;
3507 int r = SSH_ERR_INTERNAL_ERROR;
3509 size_t i, keylen = 0, ivlen = 0, authlen = 0, slen = 0;
3510 struct sshbuf *encoded = NULL, *decoded = NULL;
3511 struct sshbuf *kdf = NULL, *decrypted = NULL;
3512 struct sshcipher_ctx *ciphercontext = NULL;
3513 struct sshkey *k = NULL;
3514 u_char *key = NULL, *salt = NULL, *dp, pad, last;
3515 u_int blocksize, rounds, nkeys, encrypted_len, check1, check2;
3519 if (commentp != NULL)
3522 if ((encoded = sshbuf_new()) == NULL ||
3523 (decoded = sshbuf_new()) == NULL ||
3524 (decrypted = sshbuf_new()) == NULL) {
3525 r = SSH_ERR_ALLOC_FAIL;
3529 /* check preamble */
3530 cp = sshbuf_ptr(blob);
3531 encoded_len = sshbuf_len(blob);
3532 if (encoded_len < (MARK_BEGIN_LEN + MARK_END_LEN) ||
3533 memcmp(cp, MARK_BEGIN, MARK_BEGIN_LEN) != 0) {
3534 r = SSH_ERR_INVALID_FORMAT;
3537 cp += MARK_BEGIN_LEN;
3538 encoded_len -= MARK_BEGIN_LEN;
3540 /* Look for end marker, removing whitespace as we go */
3541 while (encoded_len > 0) {
3542 if (*cp != '\n' && *cp != '\r') {
3543 if ((r = sshbuf_put_u8(encoded, *cp)) != 0)
3550 if (encoded_len >= MARK_END_LEN &&
3551 memcmp(cp, MARK_END, MARK_END_LEN) == 0) {
3553 if ((r = sshbuf_put_u8(encoded, 0)) != 0)
3559 if (encoded_len == 0) {
3560 r = SSH_ERR_INVALID_FORMAT;
3565 if ((r = sshbuf_b64tod(decoded, (char *)sshbuf_ptr(encoded))) != 0)
3569 if (sshbuf_len(decoded) < sizeof(AUTH_MAGIC) ||
3570 memcmp(sshbuf_ptr(decoded), AUTH_MAGIC, sizeof(AUTH_MAGIC))) {
3571 r = SSH_ERR_INVALID_FORMAT;
3574 /* parse public portion of key */
3575 if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 ||
3576 (r = sshbuf_get_cstring(decoded, &ciphername, NULL)) != 0 ||
3577 (r = sshbuf_get_cstring(decoded, &kdfname, NULL)) != 0 ||
3578 (r = sshbuf_froms(decoded, &kdf)) != 0 ||
3579 (r = sshbuf_get_u32(decoded, &nkeys)) != 0 ||
3580 (r = sshbuf_skip_string(decoded)) != 0 || /* pubkey */
3581 (r = sshbuf_get_u32(decoded, &encrypted_len)) != 0)
3584 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3585 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3588 if ((passphrase == NULL || strlen(passphrase) == 0) &&
3589 strcmp(ciphername, "none") != 0) {
3590 /* passphrase required */
3591 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3594 if (strcmp(kdfname, "none") != 0 && strcmp(kdfname, "bcrypt") != 0) {
3595 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3598 if (!strcmp(kdfname, "none") && strcmp(ciphername, "none") != 0) {
3599 r = SSH_ERR_INVALID_FORMAT;
3603 /* XXX only one key supported */
3604 r = SSH_ERR_INVALID_FORMAT;
3608 /* check size of encrypted key blob */
3609 blocksize = cipher_blocksize(cipher);
3610 if (encrypted_len < blocksize || (encrypted_len % blocksize) != 0) {
3611 r = SSH_ERR_INVALID_FORMAT;
3616 keylen = cipher_keylen(cipher);
3617 ivlen = cipher_ivlen(cipher);
3618 authlen = cipher_authlen(cipher);
3619 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3620 r = SSH_ERR_ALLOC_FAIL;
3623 if (strcmp(kdfname, "bcrypt") == 0) {
3624 if ((r = sshbuf_get_string(kdf, &salt, &slen)) != 0 ||
3625 (r = sshbuf_get_u32(kdf, &rounds)) != 0)
3627 if (bcrypt_pbkdf(passphrase, strlen(passphrase), salt, slen,
3628 key, keylen + ivlen, rounds) < 0) {
3629 r = SSH_ERR_INVALID_FORMAT;
3634 /* check that an appropriate amount of auth data is present */
3635 if (sshbuf_len(decoded) < encrypted_len + authlen) {
3636 r = SSH_ERR_INVALID_FORMAT;
3640 /* decrypt private portion of key */
3641 if ((r = sshbuf_reserve(decrypted, encrypted_len, &dp)) != 0 ||
3642 (r = cipher_init(&ciphercontext, cipher, key, keylen,
3643 key + keylen, ivlen, 0)) != 0)
3645 if ((r = cipher_crypt(ciphercontext, 0, dp, sshbuf_ptr(decoded),
3646 encrypted_len, 0, authlen)) != 0) {
3647 /* an integrity error here indicates an incorrect passphrase */
3648 if (r == SSH_ERR_MAC_INVALID)
3649 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3652 if ((r = sshbuf_consume(decoded, encrypted_len + authlen)) != 0)
3654 /* there should be no trailing data */
3655 if (sshbuf_len(decoded) != 0) {
3656 r = SSH_ERR_INVALID_FORMAT;
3660 /* check check bytes */
3661 if ((r = sshbuf_get_u32(decrypted, &check1)) != 0 ||
3662 (r = sshbuf_get_u32(decrypted, &check2)) != 0)
3664 if (check1 != check2) {
3665 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3669 /* Load the private key and comment */
3670 if ((r = sshkey_private_deserialize(decrypted, &k)) != 0 ||
3671 (r = sshbuf_get_cstring(decrypted, &comment, NULL)) != 0)
3674 /* Check deterministic padding */
3676 while (sshbuf_len(decrypted)) {
3677 if ((r = sshbuf_get_u8(decrypted, &pad)) != 0)
3679 if (pad != (++i & 0xff)) {
3680 r = SSH_ERR_INVALID_FORMAT;
3685 /* XXX decode pubkey and check against private */
3693 if (commentp != NULL) {
3694 *commentp = comment;
3699 cipher_free(ciphercontext);
3704 explicit_bzero(salt, slen);
3708 explicit_bzero(key, keylen + ivlen);
3711 sshbuf_free(encoded);
3712 sshbuf_free(decoded);
3714 sshbuf_free(decrypted);
3721 /* convert SSH v2 key in OpenSSL PEM format */
3723 sshkey_private_pem_to_blob(struct sshkey *key, struct sshbuf *blob,
3724 const char *_passphrase, const char *comment)
3727 int blen, len = strlen(_passphrase);
3728 u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
3729 const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL;
3733 if (len > 0 && len <= 4)
3734 return SSH_ERR_PASSPHRASE_TOO_SHORT;
3735 if ((bio = BIO_new(BIO_s_mem())) == NULL)
3736 return SSH_ERR_ALLOC_FAIL;
3738 switch (key->type) {
3740 success = PEM_write_bio_DSAPrivateKey(bio, key->dsa,
3741 cipher, passphrase, len, NULL, NULL);
3743 #ifdef OPENSSL_HAS_ECC
3745 success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa,
3746 cipher, passphrase, len, NULL, NULL);
3750 success = PEM_write_bio_RSAPrivateKey(bio, key->rsa,
3751 cipher, passphrase, len, NULL, NULL);
3758 r = SSH_ERR_LIBCRYPTO_ERROR;
3761 if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) {
3762 r = SSH_ERR_INTERNAL_ERROR;
3765 if ((r = sshbuf_put(blob, bptr, blen)) != 0)
3772 #endif /* WITH_OPENSSL */
3774 /* Serialise "key" to buffer "blob" */
3776 sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
3777 const char *passphrase, const char *comment,
3778 int force_new_format, const char *new_format_cipher, int new_format_rounds)
3780 switch (key->type) {
3785 if (force_new_format) {
3786 return sshkey_private_to_blob2(key, blob, passphrase,
3787 comment, new_format_cipher, new_format_rounds);
3789 return sshkey_private_pem_to_blob(key, blob,
3790 passphrase, comment);
3791 #endif /* WITH_OPENSSL */
3795 #endif /* WITH_XMSS */
3796 return sshkey_private_to_blob2(key, blob, passphrase,
3797 comment, new_format_cipher, new_format_rounds);
3799 return SSH_ERR_KEY_TYPE_UNKNOWN;
3806 translate_libcrypto_error(unsigned long pem_err)
3808 int pem_reason = ERR_GET_REASON(pem_err);
3810 switch (ERR_GET_LIB(pem_err)) {
3812 switch (pem_reason) {
3813 case PEM_R_BAD_PASSWORD_READ:
3814 case PEM_R_PROBLEMS_GETTING_PASSWORD:
3815 case PEM_R_BAD_DECRYPT:
3816 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3818 return SSH_ERR_INVALID_FORMAT;
3821 switch (pem_reason) {
3822 case EVP_R_BAD_DECRYPT:
3823 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3824 #ifdef EVP_R_BN_DECODE_ERROR
3825 case EVP_R_BN_DECODE_ERROR:
3827 case EVP_R_DECODE_ERROR:
3828 #ifdef EVP_R_PRIVATE_KEY_DECODE_ERROR
3829 case EVP_R_PRIVATE_KEY_DECODE_ERROR:
3831 return SSH_ERR_INVALID_FORMAT;
3833 return SSH_ERR_LIBCRYPTO_ERROR;
3836 return SSH_ERR_INVALID_FORMAT;
3838 return SSH_ERR_LIBCRYPTO_ERROR;
3842 clear_libcrypto_errors(void)
3844 while (ERR_get_error() != 0)
3849 * Translate OpenSSL error codes to determine whether
3850 * passphrase is required/incorrect.
3853 convert_libcrypto_error(void)
3856 * Some password errors are reported at the beginning
3857 * of the error queue.
3859 if (translate_libcrypto_error(ERR_peek_error()) ==
3860 SSH_ERR_KEY_WRONG_PASSPHRASE)
3861 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3862 return translate_libcrypto_error(ERR_peek_last_error());
3866 sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
3867 const char *passphrase, struct sshkey **keyp)
3869 EVP_PKEY *pk = NULL;
3870 struct sshkey *prv = NULL;
3877 if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX)
3878 return SSH_ERR_ALLOC_FAIL;
3879 if (BIO_write(bio, sshbuf_ptr(blob), sshbuf_len(blob)) !=
3880 (int)sshbuf_len(blob)) {
3881 r = SSH_ERR_ALLOC_FAIL;
3885 clear_libcrypto_errors();
3886 if ((pk = PEM_read_bio_PrivateKey(bio, NULL, NULL,
3887 (char *)passphrase)) == NULL) {
3888 r = convert_libcrypto_error();
3891 if (EVP_PKEY_base_id(pk) == EVP_PKEY_RSA &&
3892 (type == KEY_UNSPEC || type == KEY_RSA)) {
3893 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3894 r = SSH_ERR_ALLOC_FAIL;
3897 prv->rsa = EVP_PKEY_get1_RSA(pk);
3898 prv->type = KEY_RSA;
3900 RSA_print_fp(stderr, prv->rsa, 8);
3902 if (RSA_blinding_on(prv->rsa, NULL) != 1) {
3903 r = SSH_ERR_LIBCRYPTO_ERROR;
3906 if ((r = check_rsa_length(prv->rsa)) != 0)
3908 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_DSA &&
3909 (type == KEY_UNSPEC || type == KEY_DSA)) {
3910 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3911 r = SSH_ERR_ALLOC_FAIL;
3914 prv->dsa = EVP_PKEY_get1_DSA(pk);
3915 prv->type = KEY_DSA;
3917 DSA_print_fp(stderr, prv->dsa, 8);
3919 #ifdef OPENSSL_HAS_ECC
3920 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_EC &&
3921 (type == KEY_UNSPEC || type == KEY_ECDSA)) {
3922 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3923 r = SSH_ERR_ALLOC_FAIL;
3926 prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk);
3927 prv->type = KEY_ECDSA;
3928 prv->ecdsa_nid = sshkey_ecdsa_key_to_nid(prv->ecdsa);
3929 if (prv->ecdsa_nid == -1 ||
3930 sshkey_curve_nid_to_name(prv->ecdsa_nid) == NULL ||
3931 sshkey_ec_validate_public(EC_KEY_get0_group(prv->ecdsa),
3932 EC_KEY_get0_public_key(prv->ecdsa)) != 0 ||
3933 sshkey_ec_validate_private(prv->ecdsa) != 0) {
3934 r = SSH_ERR_INVALID_FORMAT;
3938 if (prv != NULL && prv->ecdsa != NULL)
3939 sshkey_dump_ec_key(prv->ecdsa);
3941 #endif /* OPENSSL_HAS_ECC */
3943 r = SSH_ERR_INVALID_FORMAT;
3957 #endif /* WITH_OPENSSL */
3960 sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
3961 const char *passphrase, struct sshkey **keyp, char **commentp)
3963 int r = SSH_ERR_INTERNAL_ERROR;
3967 if (commentp != NULL)
3975 return sshkey_parse_private_pem_fileblob(blob, type,
3977 #endif /* WITH_OPENSSL */
3981 #endif /* WITH_XMSS */
3982 return sshkey_parse_private2(blob, type, passphrase,
3985 r = sshkey_parse_private2(blob, type, passphrase, keyp,
3987 /* Do not fallback to PEM parser if only passphrase is wrong. */
3988 if (r == 0 || r == SSH_ERR_KEY_WRONG_PASSPHRASE)
3991 return sshkey_parse_private_pem_fileblob(blob, type,
3994 return SSH_ERR_INVALID_FORMAT;
3995 #endif /* WITH_OPENSSL */
3997 return SSH_ERR_KEY_TYPE_UNKNOWN;
4002 sshkey_parse_private_fileblob(struct sshbuf *buffer, const char *passphrase,
4003 struct sshkey **keyp, char **commentp)
4007 if (commentp != NULL)
4010 return sshkey_parse_private_fileblob_type(buffer, KEY_UNSPEC,
4011 passphrase, keyp, commentp);
4016 * serialize the key with the current state and forward the state
4020 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4021 u_int32_t maxsign, sshkey_printfn *pr)
4026 sshkey_type_plain(k->type) != KEY_XMSS)
4027 return sshkey_private_serialize_opt(k, b,
4028 SSHKEY_SERIALIZE_DEFAULT);
4029 if ((r = sshkey_xmss_get_state(k, pr)) != 0 ||
4030 (r = sshkey_private_serialize_opt(k, b,
4031 SSHKEY_SERIALIZE_STATE)) != 0 ||
4032 (r = sshkey_xmss_forward_state(k, maxsign)) != 0)
4036 if ((rupdate = sshkey_xmss_update_state(k, pr)) != 0) {
4044 sshkey_signatures_left(const struct sshkey *k)
4046 if (sshkey_type_plain(k->type) == KEY_XMSS)
4047 return sshkey_xmss_signatures_left(k);
4052 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4054 if (sshkey_type_plain(k->type) != KEY_XMSS)
4055 return SSH_ERR_INVALID_ARGUMENT;
4056 return sshkey_xmss_enable_maxsign(k, maxsign);
4060 sshkey_set_filename(struct sshkey *k, const char *filename)
4063 return SSH_ERR_INVALID_ARGUMENT;
4064 if (sshkey_type_plain(k->type) != KEY_XMSS)
4066 if (filename == NULL)
4067 return SSH_ERR_INVALID_ARGUMENT;
4068 if ((k->xmss_filename = strdup(filename)) == NULL)
4069 return SSH_ERR_ALLOC_FAIL;
4074 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4075 u_int32_t maxsign, sshkey_printfn *pr)
4077 return sshkey_private_serialize_opt(k, b, SSHKEY_SERIALIZE_DEFAULT);
4081 sshkey_signatures_left(const struct sshkey *k)
4087 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4089 return SSH_ERR_INVALID_ARGUMENT;
4093 sshkey_set_filename(struct sshkey *k, const char *filename)
4096 return SSH_ERR_INVALID_ARGUMENT;
4099 #endif /* WITH_XMSS */