1 /* $OpenBSD: sshkey.c,v 1.72 2018/10/11 00:52:46 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);
83 static int get_sigtype(const u_char *sig, size_t siglen, char **sigtypep);
85 /* Supported key types */
88 const char *shortname;
95 static const struct keytype keytypes[] = {
96 { "ssh-ed25519", "ED25519", NULL, KEY_ED25519, 0, 0, 0 },
97 { "ssh-ed25519-cert-v01@openssh.com", "ED25519-CERT", NULL,
98 KEY_ED25519_CERT, 0, 1, 0 },
100 { "ssh-xmss@openssh.com", "XMSS", NULL, KEY_XMSS, 0, 0, 0 },
101 { "ssh-xmss-cert-v01@openssh.com", "XMSS-CERT", NULL,
102 KEY_XMSS_CERT, 0, 1, 0 },
103 #endif /* WITH_XMSS */
105 { "ssh-rsa", "RSA", NULL, KEY_RSA, 0, 0, 0 },
106 { "rsa-sha2-256", "RSA", NULL, KEY_RSA, 0, 0, 1 },
107 { "rsa-sha2-512", "RSA", NULL, KEY_RSA, 0, 0, 1 },
108 { "ssh-dss", "DSA", NULL, KEY_DSA, 0, 0, 0 },
109 # ifdef OPENSSL_HAS_ECC
110 { "ecdsa-sha2-nistp256", "ECDSA", NULL,
111 KEY_ECDSA, NID_X9_62_prime256v1, 0, 0 },
112 { "ecdsa-sha2-nistp384", "ECDSA", NULL,
113 KEY_ECDSA, NID_secp384r1, 0, 0 },
114 # ifdef OPENSSL_HAS_NISTP521
115 { "ecdsa-sha2-nistp521", "ECDSA", NULL,
116 KEY_ECDSA, NID_secp521r1, 0, 0 },
117 # endif /* OPENSSL_HAS_NISTP521 */
118 # endif /* OPENSSL_HAS_ECC */
119 { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL,
120 KEY_RSA_CERT, 0, 1, 0 },
121 { "rsa-sha2-256-cert-v01@openssh.com", "RSA-CERT",
122 "rsa-sha2-256", KEY_RSA_CERT, 0, 1, 1 },
123 { "rsa-sha2-512-cert-v01@openssh.com", "RSA-CERT",
124 "rsa-sha2-512", KEY_RSA_CERT, 0, 1, 1 },
125 { "ssh-dss-cert-v01@openssh.com", "DSA-CERT", NULL,
126 KEY_DSA_CERT, 0, 1, 0 },
127 # ifdef OPENSSL_HAS_ECC
128 { "ecdsa-sha2-nistp256-cert-v01@openssh.com", "ECDSA-CERT", NULL,
129 KEY_ECDSA_CERT, NID_X9_62_prime256v1, 1, 0 },
130 { "ecdsa-sha2-nistp384-cert-v01@openssh.com", "ECDSA-CERT", NULL,
131 KEY_ECDSA_CERT, NID_secp384r1, 1, 0 },
132 # ifdef OPENSSL_HAS_NISTP521
133 { "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", NULL,
134 KEY_ECDSA_CERT, NID_secp521r1, 1, 0 },
135 # endif /* OPENSSL_HAS_NISTP521 */
136 # endif /* OPENSSL_HAS_ECC */
137 #endif /* WITH_OPENSSL */
138 { NULL, NULL, NULL, -1, -1, 0, 0 }
142 sshkey_type(const struct sshkey *k)
144 const struct keytype *kt;
146 for (kt = keytypes; kt->type != -1; kt++) {
147 if (kt->type == k->type)
148 return kt->shortname;
154 sshkey_ssh_name_from_type_nid(int type, int nid)
156 const struct keytype *kt;
158 for (kt = keytypes; kt->type != -1; kt++) {
159 if (kt->type == type && (kt->nid == 0 || kt->nid == nid))
162 return "ssh-unknown";
166 sshkey_type_is_cert(int type)
168 const struct keytype *kt;
170 for (kt = keytypes; kt->type != -1; kt++) {
171 if (kt->type == type)
178 sshkey_ssh_name(const struct sshkey *k)
180 return sshkey_ssh_name_from_type_nid(k->type, k->ecdsa_nid);
184 sshkey_ssh_name_plain(const struct sshkey *k)
186 return sshkey_ssh_name_from_type_nid(sshkey_type_plain(k->type),
191 sshkey_type_from_name(const char *name)
193 const struct keytype *kt;
195 for (kt = keytypes; kt->type != -1; kt++) {
196 /* Only allow shortname matches for plain key types */
197 if ((kt->name != NULL && strcmp(name, kt->name) == 0) ||
198 (!kt->cert && strcasecmp(kt->shortname, name) == 0))
205 sshkey_ecdsa_nid_from_name(const char *name)
207 const struct keytype *kt;
209 for (kt = keytypes; kt->type != -1; kt++) {
210 if (kt->type != KEY_ECDSA && kt->type != KEY_ECDSA_CERT)
212 if (kt->name != NULL && strcmp(name, kt->name) == 0)
219 sshkey_alg_list(int certs_only, int plain_only, int include_sigonly, char sep)
221 char *tmp, *ret = NULL;
222 size_t nlen, rlen = 0;
223 const struct keytype *kt;
225 for (kt = keytypes; kt->type != -1; kt++) {
226 if (kt->name == NULL)
228 if (!include_sigonly && kt->sigonly)
230 if ((certs_only && !kt->cert) || (plain_only && kt->cert))
234 nlen = strlen(kt->name);
235 if ((tmp = realloc(ret, rlen + nlen + 2)) == NULL) {
240 memcpy(ret + rlen, kt->name, nlen + 1);
247 sshkey_names_valid2(const char *names, int allow_wildcard)
250 const struct keytype *kt;
253 if (names == NULL || strcmp(names, "") == 0)
255 if ((s = cp = strdup(names)) == NULL)
257 for ((p = strsep(&cp, ",")); p && *p != '\0';
258 (p = strsep(&cp, ","))) {
259 type = sshkey_type_from_name(p);
260 if (type == KEY_UNSPEC) {
261 if (allow_wildcard) {
263 * Try matching key types against the string.
264 * If any has a positive or negative match then
265 * the component is accepted.
267 for (kt = keytypes; kt->type != -1; kt++) {
268 if (match_pattern_list(kt->name,
284 sshkey_size(const struct sshkey *k)
287 const BIGNUM *rsa_n, *dsa_p;
288 #endif /* WITH_OPENSSL */
296 RSA_get0_key(k->rsa, &rsa_n, NULL, NULL);
297 return BN_num_bits(rsa_n);
302 DSA_get0_pqg(k->dsa, &dsa_p, NULL, NULL);
303 return BN_num_bits(dsa_p);
306 return sshkey_curve_nid_to_bits(k->ecdsa_nid);
307 #endif /* WITH_OPENSSL */
309 case KEY_ED25519_CERT:
312 return 256; /* XXX */
318 sshkey_type_is_valid_ca(int type)
333 sshkey_is_cert(const struct sshkey *k)
337 return sshkey_type_is_cert(k->type);
340 /* Return the cert-less equivalent to a certified key type */
342 sshkey_type_plain(int type)
351 case KEY_ED25519_CERT:
361 /* XXX: these are really begging for a table-driven approach */
363 sshkey_curve_name_to_nid(const char *name)
365 if (strcmp(name, "nistp256") == 0)
366 return NID_X9_62_prime256v1;
367 else if (strcmp(name, "nistp384") == 0)
368 return NID_secp384r1;
369 # ifdef OPENSSL_HAS_NISTP521
370 else if (strcmp(name, "nistp521") == 0)
371 return NID_secp521r1;
372 # endif /* OPENSSL_HAS_NISTP521 */
378 sshkey_curve_nid_to_bits(int nid)
381 case NID_X9_62_prime256v1:
385 # ifdef OPENSSL_HAS_NISTP521
388 # endif /* OPENSSL_HAS_NISTP521 */
395 sshkey_ecdsa_bits_to_nid(int bits)
399 return NID_X9_62_prime256v1;
401 return NID_secp384r1;
402 # ifdef OPENSSL_HAS_NISTP521
404 return NID_secp521r1;
405 # endif /* OPENSSL_HAS_NISTP521 */
412 sshkey_curve_nid_to_name(int nid)
415 case NID_X9_62_prime256v1:
419 # ifdef OPENSSL_HAS_NISTP521
422 # endif /* OPENSSL_HAS_NISTP521 */
429 sshkey_ec_nid_to_hash_alg(int nid)
431 int kbits = sshkey_curve_nid_to_bits(nid);
436 /* RFC5656 section 6.2.1 */
438 return SSH_DIGEST_SHA256;
439 else if (kbits <= 384)
440 return SSH_DIGEST_SHA384;
442 return SSH_DIGEST_SHA512;
444 #endif /* WITH_OPENSSL */
447 cert_free(struct sshkey_cert *cert)
453 sshbuf_free(cert->certblob);
454 sshbuf_free(cert->critical);
455 sshbuf_free(cert->extensions);
457 for (i = 0; i < cert->nprincipals; i++)
458 free(cert->principals[i]);
459 free(cert->principals);
460 sshkey_free(cert->signature_key);
461 free(cert->signature_type);
462 freezero(cert, sizeof(*cert));
465 static struct sshkey_cert *
468 struct sshkey_cert *cert;
470 if ((cert = calloc(1, sizeof(*cert))) == NULL)
472 if ((cert->certblob = sshbuf_new()) == NULL ||
473 (cert->critical = sshbuf_new()) == NULL ||
474 (cert->extensions = sshbuf_new()) == NULL) {
479 cert->principals = NULL;
480 cert->signature_key = NULL;
481 cert->signature_type = NULL;
492 #endif /* WITH_OPENSSL */
494 if ((k = calloc(1, sizeof(*k))) == NULL)
502 k->ed25519_sk = NULL;
503 k->ed25519_pk = NULL;
510 if ((rsa = RSA_new()) == NULL) {
518 if ((dsa = DSA_new()) == NULL) {
526 /* Cannot do anything until we know the group */
528 #endif /* WITH_OPENSSL */
530 case KEY_ED25519_CERT:
533 /* no need to prealloc */
542 if (sshkey_is_cert(k)) {
543 if ((k->cert = cert_new()) == NULL) {
553 sshkey_free(struct sshkey *k)
569 # ifdef OPENSSL_HAS_ECC
572 EC_KEY_free(k->ecdsa);
575 # endif /* OPENSSL_HAS_ECC */
576 #endif /* WITH_OPENSSL */
578 case KEY_ED25519_CERT:
579 freezero(k->ed25519_pk, ED25519_PK_SZ);
580 k->ed25519_pk = NULL;
581 freezero(k->ed25519_sk, ED25519_SK_SZ);
582 k->ed25519_sk = NULL;
587 freezero(k->xmss_pk, sshkey_xmss_pklen(k));
589 freezero(k->xmss_sk, sshkey_xmss_sklen(k));
591 sshkey_xmss_free_state(k);
594 free(k->xmss_filename);
595 k->xmss_filename = NULL;
597 #endif /* WITH_XMSS */
603 if (sshkey_is_cert(k))
605 freezero(k, sizeof(*k));
609 cert_compare(struct sshkey_cert *a, struct sshkey_cert *b)
611 if (a == NULL && b == NULL)
613 if (a == NULL || b == NULL)
615 if (sshbuf_len(a->certblob) != sshbuf_len(b->certblob))
617 if (timingsafe_bcmp(sshbuf_ptr(a->certblob), sshbuf_ptr(b->certblob),
618 sshbuf_len(a->certblob)) != 0)
624 * Compare public portions of key only, allowing comparisons between
625 * certificates and plain keys too.
628 sshkey_equal_public(const struct sshkey *a, const struct sshkey *b)
630 #if defined(WITH_OPENSSL)
631 const BIGNUM *rsa_e_a, *rsa_n_a;
632 const BIGNUM *rsa_e_b, *rsa_n_b;
633 const BIGNUM *dsa_p_a, *dsa_q_a, *dsa_g_a, *dsa_pub_key_a;
634 const BIGNUM *dsa_p_b, *dsa_q_b, *dsa_g_b, *dsa_pub_key_b;
635 # if defined(OPENSSL_HAS_ECC)
637 # endif /* OPENSSL_HAS_ECC */
638 #endif /* WITH_OPENSSL */
640 if (a == NULL || b == NULL ||
641 sshkey_type_plain(a->type) != sshkey_type_plain(b->type))
648 if (a->rsa == NULL || b->rsa == NULL)
650 RSA_get0_key(a->rsa, &rsa_n_a, &rsa_e_a, NULL);
651 RSA_get0_key(b->rsa, &rsa_n_b, &rsa_e_b, NULL);
652 return BN_cmp(rsa_e_a, rsa_e_b) == 0 &&
653 BN_cmp(rsa_n_a, rsa_n_b) == 0;
656 if (a->dsa == NULL || b->dsa == NULL)
658 DSA_get0_pqg(a->dsa, &dsa_p_a, &dsa_q_a, &dsa_g_a);
659 DSA_get0_pqg(b->dsa, &dsa_p_b, &dsa_q_b, &dsa_g_b);
660 DSA_get0_key(a->dsa, &dsa_pub_key_a, NULL);
661 DSA_get0_key(b->dsa, &dsa_pub_key_b, NULL);
662 return BN_cmp(dsa_p_a, dsa_p_b) == 0 &&
663 BN_cmp(dsa_q_a, dsa_q_b) == 0 &&
664 BN_cmp(dsa_g_a, dsa_g_b) == 0 &&
665 BN_cmp(dsa_pub_key_a, dsa_pub_key_b) == 0;
666 # ifdef OPENSSL_HAS_ECC
669 if (a->ecdsa == NULL || b->ecdsa == NULL ||
670 EC_KEY_get0_public_key(a->ecdsa) == NULL ||
671 EC_KEY_get0_public_key(b->ecdsa) == NULL)
673 if ((bnctx = BN_CTX_new()) == NULL)
675 if (EC_GROUP_cmp(EC_KEY_get0_group(a->ecdsa),
676 EC_KEY_get0_group(b->ecdsa), bnctx) != 0 ||
677 EC_POINT_cmp(EC_KEY_get0_group(a->ecdsa),
678 EC_KEY_get0_public_key(a->ecdsa),
679 EC_KEY_get0_public_key(b->ecdsa), bnctx) != 0) {
685 # endif /* OPENSSL_HAS_ECC */
686 #endif /* WITH_OPENSSL */
688 case KEY_ED25519_CERT:
689 return a->ed25519_pk != NULL && b->ed25519_pk != NULL &&
690 memcmp(a->ed25519_pk, b->ed25519_pk, ED25519_PK_SZ) == 0;
694 return a->xmss_pk != NULL && b->xmss_pk != NULL &&
695 sshkey_xmss_pklen(a) == sshkey_xmss_pklen(b) &&
696 memcmp(a->xmss_pk, b->xmss_pk, sshkey_xmss_pklen(a)) == 0;
697 #endif /* WITH_XMSS */
705 sshkey_equal(const struct sshkey *a, const struct sshkey *b)
707 if (a == NULL || b == NULL || a->type != b->type)
709 if (sshkey_is_cert(a)) {
710 if (!cert_compare(a->cert, b->cert))
713 return sshkey_equal_public(a, b);
717 to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
718 enum sshkey_serialize_rep opts)
720 int type, ret = SSH_ERR_INTERNAL_ERROR;
721 const char *typename;
723 const BIGNUM *rsa_n, *rsa_e, *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
724 #endif /* WITH_OPENSSL */
727 return SSH_ERR_INVALID_ARGUMENT;
729 if (sshkey_is_cert(key)) {
730 if (key->cert == NULL)
731 return SSH_ERR_EXPECTED_CERT;
732 if (sshbuf_len(key->cert->certblob) == 0)
733 return SSH_ERR_KEY_LACKS_CERTBLOB;
735 type = force_plain ? sshkey_type_plain(key->type) : key->type;
736 typename = sshkey_ssh_name_from_type_nid(type, key->ecdsa_nid);
743 #endif /* WITH_OPENSSL */
744 case KEY_ED25519_CERT:
747 #endif /* WITH_XMSS */
748 /* Use the existing blob */
749 /* XXX modified flag? */
750 if ((ret = sshbuf_putb(b, key->cert->certblob)) != 0)
755 if (key->dsa == NULL)
756 return SSH_ERR_INVALID_ARGUMENT;
757 DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
758 DSA_get0_key(key->dsa, &dsa_pub_key, NULL);
759 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
760 (ret = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
761 (ret = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
762 (ret = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
763 (ret = sshbuf_put_bignum2(b, dsa_pub_key)) != 0)
766 # ifdef OPENSSL_HAS_ECC
768 if (key->ecdsa == NULL)
769 return SSH_ERR_INVALID_ARGUMENT;
770 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
771 (ret = sshbuf_put_cstring(b,
772 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
773 (ret = sshbuf_put_eckey(b, key->ecdsa)) != 0)
778 if (key->rsa == NULL)
779 return SSH_ERR_INVALID_ARGUMENT;
780 RSA_get0_key(key->rsa, &rsa_n, &rsa_e, NULL);
781 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
782 (ret = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
783 (ret = sshbuf_put_bignum2(b, rsa_n)) != 0)
786 #endif /* WITH_OPENSSL */
788 if (key->ed25519_pk == NULL)
789 return SSH_ERR_INVALID_ARGUMENT;
790 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
791 (ret = sshbuf_put_string(b,
792 key->ed25519_pk, ED25519_PK_SZ)) != 0)
797 if (key->xmss_name == NULL || key->xmss_pk == NULL ||
798 sshkey_xmss_pklen(key) == 0)
799 return SSH_ERR_INVALID_ARGUMENT;
800 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
801 (ret = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
802 (ret = sshbuf_put_string(b,
803 key->xmss_pk, sshkey_xmss_pklen(key))) != 0 ||
804 (ret = sshkey_xmss_serialize_pk_info(key, b, opts)) != 0)
807 #endif /* WITH_XMSS */
809 return SSH_ERR_KEY_TYPE_UNKNOWN;
815 sshkey_putb(const struct sshkey *key, struct sshbuf *b)
817 return to_blob_buf(key, b, 0, SSHKEY_SERIALIZE_DEFAULT);
821 sshkey_puts_opts(const struct sshkey *key, struct sshbuf *b,
822 enum sshkey_serialize_rep opts)
827 if ((tmp = sshbuf_new()) == NULL)
828 return SSH_ERR_ALLOC_FAIL;
829 r = to_blob_buf(key, tmp, 0, opts);
831 r = sshbuf_put_stringb(b, tmp);
837 sshkey_puts(const struct sshkey *key, struct sshbuf *b)
839 return sshkey_puts_opts(key, b, SSHKEY_SERIALIZE_DEFAULT);
843 sshkey_putb_plain(const struct sshkey *key, struct sshbuf *b)
845 return to_blob_buf(key, b, 1, SSHKEY_SERIALIZE_DEFAULT);
849 to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp, int force_plain,
850 enum sshkey_serialize_rep opts)
852 int ret = SSH_ERR_INTERNAL_ERROR;
854 struct sshbuf *b = NULL;
860 if ((b = sshbuf_new()) == NULL)
861 return SSH_ERR_ALLOC_FAIL;
862 if ((ret = to_blob_buf(key, b, force_plain, opts)) != 0)
868 if ((*blobp = malloc(len)) == NULL) {
869 ret = SSH_ERR_ALLOC_FAIL;
872 memcpy(*blobp, sshbuf_ptr(b), len);
881 sshkey_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
883 return to_blob(key, blobp, lenp, 0, SSHKEY_SERIALIZE_DEFAULT);
887 sshkey_plain_to_blob(const struct sshkey *key, u_char **blobp, size_t *lenp)
889 return to_blob(key, blobp, lenp, 1, SSHKEY_SERIALIZE_DEFAULT);
893 sshkey_fingerprint_raw(const struct sshkey *k, int dgst_alg,
894 u_char **retp, size_t *lenp)
896 u_char *blob = NULL, *ret = NULL;
898 int r = SSH_ERR_INTERNAL_ERROR;
904 if (ssh_digest_bytes(dgst_alg) == 0) {
905 r = SSH_ERR_INVALID_ARGUMENT;
908 if ((r = to_blob(k, &blob, &blob_len, 1, SSHKEY_SERIALIZE_DEFAULT))
911 if ((ret = calloc(1, SSH_DIGEST_MAX_LENGTH)) == NULL) {
912 r = SSH_ERR_ALLOC_FAIL;
915 if ((r = ssh_digest_memory(dgst_alg, blob, blob_len,
916 ret, SSH_DIGEST_MAX_LENGTH)) != 0)
924 *lenp = ssh_digest_bytes(dgst_alg);
929 explicit_bzero(blob, blob_len);
936 fingerprint_b64(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
939 size_t plen = strlen(alg) + 1;
940 size_t rlen = ((dgst_raw_len + 2) / 3) * 4 + plen + 1;
943 if (dgst_raw_len > 65536 || (ret = calloc(1, rlen)) == NULL)
945 strlcpy(ret, alg, rlen);
946 strlcat(ret, ":", rlen);
947 if (dgst_raw_len == 0)
949 if ((r = b64_ntop(dgst_raw, dgst_raw_len,
950 ret + plen, rlen - plen)) == -1) {
954 /* Trim padding characters from end */
955 ret[strcspn(ret, "=")] = '\0';
960 fingerprint_hex(const char *alg, u_char *dgst_raw, size_t dgst_raw_len)
962 char *retval, hex[5];
963 size_t i, rlen = dgst_raw_len * 3 + strlen(alg) + 2;
965 if (dgst_raw_len > 65536 || (retval = calloc(1, rlen)) == NULL)
967 strlcpy(retval, alg, rlen);
968 strlcat(retval, ":", rlen);
969 for (i = 0; i < dgst_raw_len; i++) {
970 snprintf(hex, sizeof(hex), "%s%02x",
971 i > 0 ? ":" : "", dgst_raw[i]);
972 strlcat(retval, hex, rlen);
978 fingerprint_bubblebabble(u_char *dgst_raw, size_t dgst_raw_len)
980 char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' };
981 char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm',
982 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' };
983 u_int i, j = 0, rounds, seed = 1;
986 rounds = (dgst_raw_len / 2) + 1;
987 if ((retval = calloc(rounds, 6)) == NULL)
990 for (i = 0; i < rounds; i++) {
991 u_int idx0, idx1, idx2, idx3, idx4;
992 if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) {
993 idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) +
995 idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15;
996 idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) +
998 retval[j++] = vowels[idx0];
999 retval[j++] = consonants[idx1];
1000 retval[j++] = vowels[idx2];
1001 if ((i + 1) < rounds) {
1002 idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15;
1003 idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15;
1004 retval[j++] = consonants[idx3];
1006 retval[j++] = consonants[idx4];
1007 seed = ((seed * 5) +
1008 ((((u_int)(dgst_raw[2 * i])) * 7) +
1009 ((u_int)(dgst_raw[(2 * i) + 1])))) % 36;
1015 retval[j++] = vowels[idx0];
1016 retval[j++] = consonants[idx1];
1017 retval[j++] = vowels[idx2];
1026 * Draw an ASCII-Art representing the fingerprint so human brain can
1027 * profit from its built-in pattern recognition ability.
1028 * This technique is called "random art" and can be found in some
1029 * scientific publications like this original paper:
1031 * "Hash Visualization: a New Technique to improve Real-World Security",
1032 * Perrig A. and Song D., 1999, International Workshop on Cryptographic
1033 * Techniques and E-Commerce (CrypTEC '99)
1034 * sparrow.ece.cmu.edu/~adrian/projects/validation/validation.pdf
1036 * The subject came up in a talk by Dan Kaminsky, too.
1038 * If you see the picture is different, the key is different.
1039 * If the picture looks the same, you still know nothing.
1041 * The algorithm used here is a worm crawling over a discrete plane,
1042 * leaving a trace (augmenting the field) everywhere it goes.
1043 * Movement is taken from dgst_raw 2bit-wise. Bumping into walls
1044 * makes the respective movement vector be ignored for this turn.
1045 * Graphs are not unambiguous, because circles in graphs can be
1046 * walked in either direction.
1050 * Field sizes for the random art. Have to be odd, so the starting point
1051 * can be in the exact middle of the picture, and FLDBASE should be >=8 .
1052 * Else pictures would be too dense, and drawing the frame would
1053 * fail, too, because the key type would not fit in anymore.
1056 #define FLDSIZE_Y (FLDBASE + 1)
1057 #define FLDSIZE_X (FLDBASE * 2 + 1)
1059 fingerprint_randomart(const char *alg, u_char *dgst_raw, size_t dgst_raw_len,
1060 const struct sshkey *k)
1063 * Chars to be used after each other every time the worm
1064 * intersects with itself. Matter of taste.
1066 char *augmentation_string = " .o+=*BOX@%&#/^SE";
1067 char *retval, *p, title[FLDSIZE_X], hash[FLDSIZE_X];
1068 u_char field[FLDSIZE_X][FLDSIZE_Y];
1069 size_t i, tlen, hlen;
1072 size_t len = strlen(augmentation_string) - 1;
1074 if ((retval = calloc((FLDSIZE_X + 3), (FLDSIZE_Y + 2))) == NULL)
1077 /* initialize field */
1078 memset(field, 0, FLDSIZE_X * FLDSIZE_Y * sizeof(char));
1082 /* process raw key */
1083 for (i = 0; i < dgst_raw_len; i++) {
1085 /* each byte conveys four 2-bit move commands */
1086 input = dgst_raw[i];
1087 for (b = 0; b < 4; b++) {
1088 /* evaluate 2 bit, rest is shifted later */
1089 x += (input & 0x1) ? 1 : -1;
1090 y += (input & 0x2) ? 1 : -1;
1092 /* assure we are still in bounds */
1095 x = MINIMUM(x, FLDSIZE_X - 1);
1096 y = MINIMUM(y, FLDSIZE_Y - 1);
1098 /* augment the field */
1099 if (field[x][y] < len - 2)
1105 /* mark starting point and end point*/
1106 field[FLDSIZE_X / 2][FLDSIZE_Y / 2] = len - 1;
1109 /* assemble title */
1110 r = snprintf(title, sizeof(title), "[%s %u]",
1111 sshkey_type(k), sshkey_size(k));
1112 /* If [type size] won't fit, then try [type]; fits "[ED25519-CERT]" */
1113 if (r < 0 || r > (int)sizeof(title))
1114 r = snprintf(title, sizeof(title), "[%s]", sshkey_type(k));
1115 tlen = (r <= 0) ? 0 : strlen(title);
1117 /* assemble hash ID. */
1118 r = snprintf(hash, sizeof(hash), "[%s]", alg);
1119 hlen = (r <= 0) ? 0 : strlen(hash);
1121 /* output upper border */
1124 for (i = 0; i < (FLDSIZE_X - tlen) / 2; i++)
1126 memcpy(p, title, tlen);
1128 for (i += tlen; i < FLDSIZE_X; i++)
1133 /* output content */
1134 for (y = 0; y < FLDSIZE_Y; y++) {
1136 for (x = 0; x < FLDSIZE_X; x++)
1137 *p++ = augmentation_string[MINIMUM(field[x][y], len)];
1142 /* output lower border */
1144 for (i = 0; i < (FLDSIZE_X - hlen) / 2; i++)
1146 memcpy(p, hash, hlen);
1148 for (i += hlen; i < FLDSIZE_X; i++)
1156 sshkey_fingerprint(const struct sshkey *k, int dgst_alg,
1157 enum sshkey_fp_rep dgst_rep)
1159 char *retval = NULL;
1161 size_t dgst_raw_len;
1163 if (sshkey_fingerprint_raw(k, dgst_alg, &dgst_raw, &dgst_raw_len) != 0)
1166 case SSH_FP_DEFAULT:
1167 if (dgst_alg == SSH_DIGEST_MD5) {
1168 retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
1169 dgst_raw, dgst_raw_len);
1171 retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
1172 dgst_raw, dgst_raw_len);
1176 retval = fingerprint_hex(ssh_digest_alg_name(dgst_alg),
1177 dgst_raw, dgst_raw_len);
1180 retval = fingerprint_b64(ssh_digest_alg_name(dgst_alg),
1181 dgst_raw, dgst_raw_len);
1183 case SSH_FP_BUBBLEBABBLE:
1184 retval = fingerprint_bubblebabble(dgst_raw, dgst_raw_len);
1186 case SSH_FP_RANDOMART:
1187 retval = fingerprint_randomart(ssh_digest_alg_name(dgst_alg),
1188 dgst_raw, dgst_raw_len, k);
1191 explicit_bzero(dgst_raw, dgst_raw_len);
1195 explicit_bzero(dgst_raw, dgst_raw_len);
1201 peek_type_nid(const char *s, size_t l, int *nid)
1203 const struct keytype *kt;
1205 for (kt = keytypes; kt->type != -1; kt++) {
1206 if (kt->name == NULL || strlen(kt->name) != l)
1208 if (memcmp(s, kt->name, l) == 0) {
1210 if (kt->type == KEY_ECDSA || kt->type == KEY_ECDSA_CERT)
1218 /* XXX this can now be made const char * */
1220 sshkey_read(struct sshkey *ret, char **cpp)
1223 char *cp, *blobcopy;
1225 int r, type, curve_nid = -1;
1226 struct sshbuf *blob;
1229 return SSH_ERR_INVALID_ARGUMENT;
1231 switch (ret->type) {
1238 case KEY_ECDSA_CERT:
1240 case KEY_ED25519_CERT:
1244 #endif /* WITH_XMSS */
1247 return SSH_ERR_INVALID_ARGUMENT;
1252 space = strcspn(cp, " \t");
1253 if (space == strlen(cp))
1254 return SSH_ERR_INVALID_FORMAT;
1255 if ((type = peek_type_nid(cp, space, &curve_nid)) == KEY_UNSPEC)
1256 return SSH_ERR_INVALID_FORMAT;
1258 /* skip whitespace */
1259 for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
1262 return SSH_ERR_INVALID_FORMAT;
1263 if (ret->type != KEY_UNSPEC && ret->type != type)
1264 return SSH_ERR_KEY_TYPE_MISMATCH;
1265 if ((blob = sshbuf_new()) == NULL)
1266 return SSH_ERR_ALLOC_FAIL;
1268 /* find end of keyblob and decode */
1269 space = strcspn(cp, " \t");
1270 if ((blobcopy = strndup(cp, space)) == NULL) {
1272 return SSH_ERR_ALLOC_FAIL;
1274 if ((r = sshbuf_b64tod(blob, blobcopy)) != 0) {
1280 if ((r = sshkey_fromb(blob, &k)) != 0) {
1286 /* skip whitespace and leave cp at start of comment */
1287 for (cp += space; *cp == ' ' || *cp == '\t'; cp++)
1290 /* ensure type of blob matches type at start of line */
1291 if (k->type != type) {
1293 return SSH_ERR_KEY_TYPE_MISMATCH;
1295 if (sshkey_type_plain(type) == KEY_ECDSA && curve_nid != k->ecdsa_nid) {
1297 return SSH_ERR_EC_CURVE_MISMATCH;
1300 /* Fill in ret from parsed key */
1302 if (sshkey_is_cert(ret)) {
1303 if (!sshkey_is_cert(k)) {
1305 return SSH_ERR_EXPECTED_CERT;
1307 if (ret->cert != NULL)
1308 cert_free(ret->cert);
1309 ret->cert = k->cert;
1312 switch (sshkey_type_plain(ret->type)) {
1319 RSA_print_fp(stderr, ret->rsa, 8);
1327 DSA_print_fp(stderr, ret->dsa, 8);
1330 # ifdef OPENSSL_HAS_ECC
1332 EC_KEY_free(ret->ecdsa);
1333 ret->ecdsa = k->ecdsa;
1334 ret->ecdsa_nid = k->ecdsa_nid;
1338 sshkey_dump_ec_key(ret->ecdsa);
1341 # endif /* OPENSSL_HAS_ECC */
1342 #endif /* WITH_OPENSSL */
1344 freezero(ret->ed25519_pk, ED25519_PK_SZ);
1345 ret->ed25519_pk = k->ed25519_pk;
1346 k->ed25519_pk = NULL;
1354 ret->xmss_pk = k->xmss_pk;
1356 free(ret->xmss_state);
1357 ret->xmss_state = k->xmss_state;
1358 k->xmss_state = NULL;
1359 free(ret->xmss_name);
1360 ret->xmss_name = k->xmss_name;
1361 k->xmss_name = NULL;
1362 free(ret->xmss_filename);
1363 ret->xmss_filename = k->xmss_filename;
1364 k->xmss_filename = NULL;
1369 #endif /* WITH_XMSS */
1372 return SSH_ERR_INTERNAL_ERROR;
1383 sshkey_to_base64(const struct sshkey *key, char **b64p)
1385 int r = SSH_ERR_INTERNAL_ERROR;
1386 struct sshbuf *b = NULL;
1391 if ((b = sshbuf_new()) == NULL)
1392 return SSH_ERR_ALLOC_FAIL;
1393 if ((r = sshkey_putb(key, b)) != 0)
1395 if ((uu = sshbuf_dtob64(b)) == NULL) {
1396 r = SSH_ERR_ALLOC_FAIL;
1412 sshkey_format_text(const struct sshkey *key, struct sshbuf *b)
1414 int r = SSH_ERR_INTERNAL_ERROR;
1417 if ((r = sshkey_to_base64(key, &uu)) != 0)
1419 if ((r = sshbuf_putf(b, "%s %s",
1420 sshkey_ssh_name(key), uu)) != 0)
1429 sshkey_write(const struct sshkey *key, FILE *f)
1431 struct sshbuf *b = NULL;
1432 int r = SSH_ERR_INTERNAL_ERROR;
1434 if ((b = sshbuf_new()) == NULL)
1435 return SSH_ERR_ALLOC_FAIL;
1436 if ((r = sshkey_format_text(key, b)) != 0)
1438 if (fwrite(sshbuf_ptr(b), sshbuf_len(b), 1, f) != 1) {
1441 r = SSH_ERR_SYSTEM_ERROR;
1452 sshkey_cert_type(const struct sshkey *k)
1454 switch (k->cert->type) {
1455 case SSH2_CERT_TYPE_USER:
1457 case SSH2_CERT_TYPE_HOST:
1466 rsa_generate_private_key(u_int bits, RSA **rsap)
1468 RSA *private = NULL;
1470 int ret = SSH_ERR_INTERNAL_ERROR;
1473 return SSH_ERR_INVALID_ARGUMENT;
1474 if (bits < SSH_RSA_MINIMUM_MODULUS_SIZE ||
1475 bits > SSHBUF_MAX_BIGNUM * 8)
1476 return SSH_ERR_KEY_LENGTH;
1478 if ((private = RSA_new()) == NULL || (f4 = BN_new()) == NULL) {
1479 ret = SSH_ERR_ALLOC_FAIL;
1482 if (!BN_set_word(f4, RSA_F4) ||
1483 !RSA_generate_key_ex(private, bits, f4, NULL)) {
1484 ret = SSH_ERR_LIBCRYPTO_ERROR;
1497 dsa_generate_private_key(u_int bits, DSA **dsap)
1500 int ret = SSH_ERR_INTERNAL_ERROR;
1503 return SSH_ERR_INVALID_ARGUMENT;
1505 return SSH_ERR_KEY_LENGTH;
1506 if ((private = DSA_new()) == NULL) {
1507 ret = SSH_ERR_ALLOC_FAIL;
1511 if (!DSA_generate_parameters_ex(private, bits, NULL, 0, NULL,
1512 NULL, NULL) || !DSA_generate_key(private)) {
1513 ret = SSH_ERR_LIBCRYPTO_ERROR;
1524 # ifdef OPENSSL_HAS_ECC
1526 sshkey_ecdsa_key_to_nid(EC_KEY *k)
1530 NID_X9_62_prime256v1,
1532 # ifdef OPENSSL_HAS_NISTP521
1534 # endif /* OPENSSL_HAS_NISTP521 */
1540 const EC_GROUP *g = EC_KEY_get0_group(k);
1543 * The group may be stored in a ASN.1 encoded private key in one of two
1544 * ways: as a "named group", which is reconstituted by ASN.1 object ID
1545 * or explicit group parameters encoded into the key blob. Only the
1546 * "named group" case sets the group NID for us, but we can figure
1547 * it out for the other case by comparing against all the groups that
1550 if ((nid = EC_GROUP_get_curve_name(g)) > 0)
1552 if ((bnctx = BN_CTX_new()) == NULL)
1554 for (i = 0; nids[i] != -1; i++) {
1555 if ((eg = EC_GROUP_new_by_curve_name(nids[i])) == NULL) {
1559 if (EC_GROUP_cmp(g, eg, bnctx) == 0)
1564 if (nids[i] != -1) {
1565 /* Use the group with the NID attached */
1566 EC_GROUP_set_asn1_flag(eg, OPENSSL_EC_NAMED_CURVE);
1567 if (EC_KEY_set_group(k, eg) != 1) {
1576 ecdsa_generate_private_key(u_int bits, int *nid, EC_KEY **ecdsap)
1579 int ret = SSH_ERR_INTERNAL_ERROR;
1581 if (nid == NULL || ecdsap == NULL)
1582 return SSH_ERR_INVALID_ARGUMENT;
1583 if ((*nid = sshkey_ecdsa_bits_to_nid(bits)) == -1)
1584 return SSH_ERR_KEY_LENGTH;
1586 if ((private = EC_KEY_new_by_curve_name(*nid)) == NULL) {
1587 ret = SSH_ERR_ALLOC_FAIL;
1590 if (EC_KEY_generate_key(private) != 1) {
1591 ret = SSH_ERR_LIBCRYPTO_ERROR;
1594 EC_KEY_set_asn1_flag(private, OPENSSL_EC_NAMED_CURVE);
1599 EC_KEY_free(private);
1602 # endif /* OPENSSL_HAS_ECC */
1603 #endif /* WITH_OPENSSL */
1606 sshkey_generate(int type, u_int bits, struct sshkey **keyp)
1609 int ret = SSH_ERR_INTERNAL_ERROR;
1612 return SSH_ERR_INVALID_ARGUMENT;
1614 if ((k = sshkey_new(KEY_UNSPEC)) == NULL)
1615 return SSH_ERR_ALLOC_FAIL;
1618 if ((k->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL ||
1619 (k->ed25519_sk = malloc(ED25519_SK_SZ)) == NULL) {
1620 ret = SSH_ERR_ALLOC_FAIL;
1623 crypto_sign_ed25519_keypair(k->ed25519_pk, k->ed25519_sk);
1628 ret = sshkey_xmss_generate_private_key(k, bits);
1630 #endif /* WITH_XMSS */
1633 ret = dsa_generate_private_key(bits, &k->dsa);
1635 # ifdef OPENSSL_HAS_ECC
1637 ret = ecdsa_generate_private_key(bits, &k->ecdsa_nid,
1640 # endif /* OPENSSL_HAS_ECC */
1642 ret = rsa_generate_private_key(bits, &k->rsa);
1644 #endif /* WITH_OPENSSL */
1646 ret = SSH_ERR_INVALID_ARGUMENT;
1657 sshkey_cert_copy(const struct sshkey *from_key, struct sshkey *to_key)
1660 const struct sshkey_cert *from;
1661 struct sshkey_cert *to;
1662 int r = SSH_ERR_INTERNAL_ERROR;
1664 if (to_key == NULL || (from = from_key->cert) == NULL)
1665 return SSH_ERR_INVALID_ARGUMENT;
1667 if ((to = cert_new()) == NULL)
1668 return SSH_ERR_ALLOC_FAIL;
1670 if ((r = sshbuf_putb(to->certblob, from->certblob)) != 0 ||
1671 (r = sshbuf_putb(to->critical, from->critical)) != 0 ||
1672 (r = sshbuf_putb(to->extensions, from->extensions)) != 0)
1675 to->serial = from->serial;
1676 to->type = from->type;
1677 if (from->key_id == NULL)
1679 else if ((to->key_id = strdup(from->key_id)) == NULL) {
1680 r = SSH_ERR_ALLOC_FAIL;
1683 to->valid_after = from->valid_after;
1684 to->valid_before = from->valid_before;
1685 if (from->signature_key == NULL)
1686 to->signature_key = NULL;
1687 else if ((r = sshkey_from_private(from->signature_key,
1688 &to->signature_key)) != 0)
1690 if (from->signature_type != NULL &&
1691 (to->signature_type = strdup(from->signature_type)) == NULL) {
1692 r = SSH_ERR_ALLOC_FAIL;
1695 if (from->nprincipals > SSHKEY_CERT_MAX_PRINCIPALS) {
1696 r = SSH_ERR_INVALID_ARGUMENT;
1699 if (from->nprincipals > 0) {
1700 if ((to->principals = calloc(from->nprincipals,
1701 sizeof(*to->principals))) == NULL) {
1702 r = SSH_ERR_ALLOC_FAIL;
1705 for (i = 0; i < from->nprincipals; i++) {
1706 to->principals[i] = strdup(from->principals[i]);
1707 if (to->principals[i] == NULL) {
1708 to->nprincipals = i;
1709 r = SSH_ERR_ALLOC_FAIL;
1714 to->nprincipals = from->nprincipals;
1717 cert_free(to_key->cert);
1727 sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1729 struct sshkey *n = NULL;
1730 int r = SSH_ERR_INTERNAL_ERROR;
1732 const BIGNUM *rsa_n, *rsa_e;
1733 BIGNUM *rsa_n_dup = NULL, *rsa_e_dup = NULL;
1734 const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
1735 BIGNUM *dsa_p_dup = NULL, *dsa_q_dup = NULL, *dsa_g_dup = NULL;
1736 BIGNUM *dsa_pub_key_dup = NULL;
1737 #endif /* WITH_OPENSSL */
1744 if ((n = sshkey_new(k->type)) == NULL) {
1745 r = SSH_ERR_ALLOC_FAIL;
1749 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
1750 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
1751 if ((dsa_p_dup = BN_dup(dsa_p)) == NULL ||
1752 (dsa_q_dup = BN_dup(dsa_q)) == NULL ||
1753 (dsa_g_dup = BN_dup(dsa_g)) == NULL ||
1754 (dsa_pub_key_dup = BN_dup(dsa_pub_key)) == NULL) {
1755 r = SSH_ERR_ALLOC_FAIL;
1758 if (!DSA_set0_pqg(n->dsa, dsa_p_dup, dsa_q_dup, dsa_g_dup)) {
1759 r = SSH_ERR_LIBCRYPTO_ERROR;
1762 dsa_p_dup = dsa_q_dup = dsa_g_dup = NULL; /* transferred */
1763 if (!DSA_set0_key(n->dsa, dsa_pub_key_dup, NULL)) {
1764 r = SSH_ERR_LIBCRYPTO_ERROR;
1767 dsa_pub_key_dup = NULL; /* transferred */
1770 # ifdef OPENSSL_HAS_ECC
1772 case KEY_ECDSA_CERT:
1773 if ((n = sshkey_new(k->type)) == NULL) {
1774 r = SSH_ERR_ALLOC_FAIL;
1777 n->ecdsa_nid = k->ecdsa_nid;
1778 n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
1779 if (n->ecdsa == NULL) {
1780 r = SSH_ERR_ALLOC_FAIL;
1783 if (EC_KEY_set_public_key(n->ecdsa,
1784 EC_KEY_get0_public_key(k->ecdsa)) != 1) {
1785 r = SSH_ERR_LIBCRYPTO_ERROR;
1789 # endif /* OPENSSL_HAS_ECC */
1792 if ((n = sshkey_new(k->type)) == NULL) {
1793 r = SSH_ERR_ALLOC_FAIL;
1796 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
1797 if ((rsa_n_dup = BN_dup(rsa_n)) == NULL ||
1798 (rsa_e_dup = BN_dup(rsa_e)) == NULL) {
1799 r = SSH_ERR_ALLOC_FAIL;
1802 if (!RSA_set0_key(n->rsa, rsa_n_dup, rsa_e_dup, NULL)) {
1803 r = SSH_ERR_LIBCRYPTO_ERROR;
1806 rsa_n_dup = rsa_e_dup = NULL; /* transferred */
1808 #endif /* WITH_OPENSSL */
1810 case KEY_ED25519_CERT:
1811 if ((n = sshkey_new(k->type)) == NULL) {
1812 r = SSH_ERR_ALLOC_FAIL;
1815 if (k->ed25519_pk != NULL) {
1816 if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) {
1817 r = SSH_ERR_ALLOC_FAIL;
1820 memcpy(n->ed25519_pk, k->ed25519_pk, ED25519_PK_SZ);
1826 if ((n = sshkey_new(k->type)) == NULL) {
1827 r = SSH_ERR_ALLOC_FAIL;
1830 if ((r = sshkey_xmss_init(n, k->xmss_name)) != 0)
1832 if (k->xmss_pk != NULL) {
1833 size_t pklen = sshkey_xmss_pklen(k);
1834 if (pklen == 0 || sshkey_xmss_pklen(n) != pklen) {
1835 r = SSH_ERR_INTERNAL_ERROR;
1838 if ((n->xmss_pk = malloc(pklen)) == NULL) {
1839 r = SSH_ERR_ALLOC_FAIL;
1842 memcpy(n->xmss_pk, k->xmss_pk, pklen);
1845 #endif /* WITH_XMSS */
1847 r = SSH_ERR_KEY_TYPE_UNKNOWN;
1850 if (sshkey_is_cert(k) && (r = sshkey_cert_copy(k, n)) != 0)
1859 BN_clear_free(rsa_n_dup);
1860 BN_clear_free(rsa_e_dup);
1861 BN_clear_free(dsa_p_dup);
1862 BN_clear_free(dsa_q_dup);
1863 BN_clear_free(dsa_g_dup);
1864 BN_clear_free(dsa_pub_key_dup);
1871 cert_parse(struct sshbuf *b, struct sshkey *key, struct sshbuf *certbuf)
1873 struct sshbuf *principals = NULL, *crit = NULL;
1874 struct sshbuf *exts = NULL, *ca = NULL;
1876 size_t signed_len = 0, slen = 0, kidlen = 0;
1877 int ret = SSH_ERR_INTERNAL_ERROR;
1879 /* Copy the entire key blob for verification and later serialisation */
1880 if ((ret = sshbuf_putb(key->cert->certblob, certbuf)) != 0)
1883 /* Parse body of certificate up to signature */
1884 if ((ret = sshbuf_get_u64(b, &key->cert->serial)) != 0 ||
1885 (ret = sshbuf_get_u32(b, &key->cert->type)) != 0 ||
1886 (ret = sshbuf_get_cstring(b, &key->cert->key_id, &kidlen)) != 0 ||
1887 (ret = sshbuf_froms(b, &principals)) != 0 ||
1888 (ret = sshbuf_get_u64(b, &key->cert->valid_after)) != 0 ||
1889 (ret = sshbuf_get_u64(b, &key->cert->valid_before)) != 0 ||
1890 (ret = sshbuf_froms(b, &crit)) != 0 ||
1891 (ret = sshbuf_froms(b, &exts)) != 0 ||
1892 (ret = sshbuf_get_string_direct(b, NULL, NULL)) != 0 ||
1893 (ret = sshbuf_froms(b, &ca)) != 0) {
1894 /* XXX debug print error for ret */
1895 ret = SSH_ERR_INVALID_FORMAT;
1899 /* Signature is left in the buffer so we can calculate this length */
1900 signed_len = sshbuf_len(key->cert->certblob) - sshbuf_len(b);
1902 if ((ret = sshbuf_get_string(b, &sig, &slen)) != 0) {
1903 ret = SSH_ERR_INVALID_FORMAT;
1907 if (key->cert->type != SSH2_CERT_TYPE_USER &&
1908 key->cert->type != SSH2_CERT_TYPE_HOST) {
1909 ret = SSH_ERR_KEY_CERT_UNKNOWN_TYPE;
1913 /* Parse principals section */
1914 while (sshbuf_len(principals) > 0) {
1915 char *principal = NULL;
1916 char **oprincipals = NULL;
1918 if (key->cert->nprincipals >= SSHKEY_CERT_MAX_PRINCIPALS) {
1919 ret = SSH_ERR_INVALID_FORMAT;
1922 if ((ret = sshbuf_get_cstring(principals, &principal,
1924 ret = SSH_ERR_INVALID_FORMAT;
1927 oprincipals = key->cert->principals;
1928 key->cert->principals = recallocarray(key->cert->principals,
1929 key->cert->nprincipals, key->cert->nprincipals + 1,
1930 sizeof(*key->cert->principals));
1931 if (key->cert->principals == NULL) {
1933 key->cert->principals = oprincipals;
1934 ret = SSH_ERR_ALLOC_FAIL;
1937 key->cert->principals[key->cert->nprincipals++] = principal;
1941 * Stash a copies of the critical options and extensions sections
1944 if ((ret = sshbuf_putb(key->cert->critical, crit)) != 0 ||
1946 (ret = sshbuf_putb(key->cert->extensions, exts)) != 0))
1950 * Validate critical options and extensions sections format.
1952 while (sshbuf_len(crit) != 0) {
1953 if ((ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0 ||
1954 (ret = sshbuf_get_string_direct(crit, NULL, NULL)) != 0) {
1955 sshbuf_reset(key->cert->critical);
1956 ret = SSH_ERR_INVALID_FORMAT;
1960 while (exts != NULL && sshbuf_len(exts) != 0) {
1961 if ((ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0 ||
1962 (ret = sshbuf_get_string_direct(exts, NULL, NULL)) != 0) {
1963 sshbuf_reset(key->cert->extensions);
1964 ret = SSH_ERR_INVALID_FORMAT;
1969 /* Parse CA key and check signature */
1970 if (sshkey_from_blob_internal(ca, &key->cert->signature_key, 0) != 0) {
1971 ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
1974 if (!sshkey_type_is_valid_ca(key->cert->signature_key->type)) {
1975 ret = SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
1978 if ((ret = sshkey_verify(key->cert->signature_key, sig, slen,
1979 sshbuf_ptr(key->cert->certblob), signed_len, NULL, 0)) != 0)
1981 if ((ret = get_sigtype(sig, slen, &key->cert->signature_type)) != 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;
2322 * Checks whether a certificate's signature type is allowed.
2323 * Returns 0 (success) if the certificate signature type appears in the
2324 * "allowed" pattern-list, or the key is not a certificate to begin with.
2325 * Otherwise returns a ssherr.h code.
2328 sshkey_check_cert_sigtype(const struct sshkey *key, const char *allowed)
2330 if (key == NULL || allowed == NULL)
2331 return SSH_ERR_INVALID_ARGUMENT;
2332 if (!sshkey_type_is_cert(key->type))
2334 if (key->cert == NULL || key->cert->signature_type == NULL)
2335 return SSH_ERR_INVALID_ARGUMENT;
2336 if (match_pattern_list(key->cert->signature_type, allowed, 0) != 1)
2337 return SSH_ERR_SIGN_ALG_UNSUPPORTED;
2342 * Returns the expected signature algorithm for a given public key algorithm.
2345 sshkey_sigalg_by_name(const char *name)
2347 const struct keytype *kt;
2349 for (kt = keytypes; kt->type != -1; kt++) {
2350 if (strcmp(kt->name, name) != 0)
2352 if (kt->sigalg != NULL)
2356 return sshkey_ssh_name_from_type_nid(
2357 sshkey_type_plain(kt->type), kt->nid);
2363 * Verifies that the signature algorithm appearing inside the signature blob
2364 * matches that which was requested.
2367 sshkey_check_sigtype(const u_char *sig, size_t siglen,
2368 const char *requested_alg)
2370 const char *expected_alg;
2371 char *sigtype = NULL;
2374 if (requested_alg == NULL)
2376 if ((expected_alg = sshkey_sigalg_by_name(requested_alg)) == NULL)
2377 return SSH_ERR_INVALID_ARGUMENT;
2378 if ((r = get_sigtype(sig, siglen, &sigtype)) != 0)
2380 r = strcmp(expected_alg, sigtype) == 0;
2382 return r ? 0 : SSH_ERR_SIGN_ALG_UNSUPPORTED;
2386 sshkey_sign(const struct sshkey *key,
2387 u_char **sigp, size_t *lenp,
2388 const u_char *data, size_t datalen, const char *alg, u_int compat)
2394 if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2395 return SSH_ERR_INVALID_ARGUMENT;
2396 switch (key->type) {
2400 return ssh_dss_sign(key, sigp, lenp, data, datalen, compat);
2401 # ifdef OPENSSL_HAS_ECC
2402 case KEY_ECDSA_CERT:
2404 return ssh_ecdsa_sign(key, sigp, lenp, data, datalen, compat);
2405 # endif /* OPENSSL_HAS_ECC */
2408 return ssh_rsa_sign(key, sigp, lenp, data, datalen, alg);
2409 #endif /* WITH_OPENSSL */
2411 case KEY_ED25519_CERT:
2412 return ssh_ed25519_sign(key, sigp, lenp, data, datalen, compat);
2416 return ssh_xmss_sign(key, sigp, lenp, data, datalen, compat);
2417 #endif /* WITH_XMSS */
2419 return SSH_ERR_KEY_TYPE_UNKNOWN;
2424 * ssh_key_verify returns 0 for a correct signature and < 0 on error.
2425 * If "alg" specified, then the signature must use that algorithm.
2428 sshkey_verify(const struct sshkey *key,
2429 const u_char *sig, size_t siglen,
2430 const u_char *data, size_t dlen, const char *alg, u_int compat)
2432 if (siglen == 0 || dlen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2433 return SSH_ERR_INVALID_ARGUMENT;
2434 switch (key->type) {
2438 return ssh_dss_verify(key, sig, siglen, data, dlen, compat);
2439 # ifdef OPENSSL_HAS_ECC
2440 case KEY_ECDSA_CERT:
2442 return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat);
2443 # endif /* OPENSSL_HAS_ECC */
2446 return ssh_rsa_verify(key, sig, siglen, data, dlen, alg);
2447 #endif /* WITH_OPENSSL */
2449 case KEY_ED25519_CERT:
2450 return ssh_ed25519_verify(key, sig, siglen, data, dlen, compat);
2454 return ssh_xmss_verify(key, sig, siglen, data, dlen, compat);
2455 #endif /* WITH_XMSS */
2457 return SSH_ERR_KEY_TYPE_UNKNOWN;
2461 /* Convert a plain key to their _CERT equivalent */
2463 sshkey_to_certified(struct sshkey *k)
2470 newtype = KEY_RSA_CERT;
2473 newtype = KEY_DSA_CERT;
2476 newtype = KEY_ECDSA_CERT;
2478 #endif /* WITH_OPENSSL */
2480 newtype = KEY_ED25519_CERT;
2484 newtype = KEY_XMSS_CERT;
2486 #endif /* WITH_XMSS */
2488 return SSH_ERR_INVALID_ARGUMENT;
2490 if ((k->cert = cert_new()) == NULL)
2491 return SSH_ERR_ALLOC_FAIL;
2496 /* Convert a certificate to its raw key equivalent */
2498 sshkey_drop_cert(struct sshkey *k)
2500 if (!sshkey_type_is_cert(k->type))
2501 return SSH_ERR_KEY_TYPE_UNKNOWN;
2504 k->type = sshkey_type_plain(k->type);
2508 /* Sign a certified key, (re-)generating the signed certblob. */
2510 sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
2511 sshkey_certify_signer *signer, void *signer_ctx)
2513 struct sshbuf *principals = NULL;
2514 u_char *ca_blob = NULL, *sig_blob = NULL, nonce[32];
2515 size_t i, ca_len, sig_len;
2516 int ret = SSH_ERR_INTERNAL_ERROR;
2517 struct sshbuf *cert = NULL;
2518 char *sigtype = NULL;
2520 const BIGNUM *rsa_n, *rsa_e, *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
2521 #endif /* WITH_OPENSSL */
2523 if (k == NULL || k->cert == NULL ||
2524 k->cert->certblob == NULL || ca == NULL)
2525 return SSH_ERR_INVALID_ARGUMENT;
2526 if (!sshkey_is_cert(k))
2527 return SSH_ERR_KEY_TYPE_UNKNOWN;
2528 if (!sshkey_type_is_valid_ca(ca->type))
2529 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2532 * If no alg specified as argument but a signature_type was set,
2533 * then prefer that. If both were specified, then they must match.
2536 alg = k->cert->signature_type;
2537 else if (k->cert->signature_type != NULL &&
2538 strcmp(alg, k->cert->signature_type) != 0)
2539 return SSH_ERR_INVALID_ARGUMENT;
2541 if ((ret = sshkey_to_blob(ca, &ca_blob, &ca_len)) != 0)
2542 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2544 cert = k->cert->certblob; /* for readability */
2546 if ((ret = sshbuf_put_cstring(cert, sshkey_ssh_name(k))) != 0)
2549 /* -v01 certs put nonce first */
2550 arc4random_buf(&nonce, sizeof(nonce));
2551 if ((ret = sshbuf_put_string(cert, nonce, sizeof(nonce))) != 0)
2554 /* XXX this substantially duplicates to_blob(); refactor */
2558 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
2559 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
2560 if ((ret = sshbuf_put_bignum2(cert, dsa_p)) != 0 ||
2561 (ret = sshbuf_put_bignum2(cert, dsa_q)) != 0 ||
2562 (ret = sshbuf_put_bignum2(cert, dsa_g)) != 0 ||
2563 (ret = sshbuf_put_bignum2(cert, dsa_pub_key)) != 0)
2566 # ifdef OPENSSL_HAS_ECC
2567 case KEY_ECDSA_CERT:
2568 if ((ret = sshbuf_put_cstring(cert,
2569 sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 ||
2570 (ret = sshbuf_put_ec(cert,
2571 EC_KEY_get0_public_key(k->ecdsa),
2572 EC_KEY_get0_group(k->ecdsa))) != 0)
2575 # endif /* OPENSSL_HAS_ECC */
2577 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
2578 if ((ret = sshbuf_put_bignum2(cert, rsa_e)) != 0 ||
2579 (ret = sshbuf_put_bignum2(cert, rsa_n)) != 0)
2582 #endif /* WITH_OPENSSL */
2583 case KEY_ED25519_CERT:
2584 if ((ret = sshbuf_put_string(cert,
2585 k->ed25519_pk, ED25519_PK_SZ)) != 0)
2590 if (k->xmss_name == NULL) {
2591 ret = SSH_ERR_INVALID_ARGUMENT;
2594 if ((ret = sshbuf_put_cstring(cert, k->xmss_name)) ||
2595 (ret = sshbuf_put_string(cert,
2596 k->xmss_pk, sshkey_xmss_pklen(k))) != 0)
2599 #endif /* WITH_XMSS */
2601 ret = SSH_ERR_INVALID_ARGUMENT;
2605 if ((ret = sshbuf_put_u64(cert, k->cert->serial)) != 0 ||
2606 (ret = sshbuf_put_u32(cert, k->cert->type)) != 0 ||
2607 (ret = sshbuf_put_cstring(cert, k->cert->key_id)) != 0)
2610 if ((principals = sshbuf_new()) == NULL) {
2611 ret = SSH_ERR_ALLOC_FAIL;
2614 for (i = 0; i < k->cert->nprincipals; i++) {
2615 if ((ret = sshbuf_put_cstring(principals,
2616 k->cert->principals[i])) != 0)
2619 if ((ret = sshbuf_put_stringb(cert, principals)) != 0 ||
2620 (ret = sshbuf_put_u64(cert, k->cert->valid_after)) != 0 ||
2621 (ret = sshbuf_put_u64(cert, k->cert->valid_before)) != 0 ||
2622 (ret = sshbuf_put_stringb(cert, k->cert->critical)) != 0 ||
2623 (ret = sshbuf_put_stringb(cert, k->cert->extensions)) != 0 ||
2624 (ret = sshbuf_put_string(cert, NULL, 0)) != 0 || /* Reserved */
2625 (ret = sshbuf_put_string(cert, ca_blob, ca_len)) != 0)
2628 /* Sign the whole mess */
2629 if ((ret = signer(ca, &sig_blob, &sig_len, sshbuf_ptr(cert),
2630 sshbuf_len(cert), alg, 0, signer_ctx)) != 0)
2632 /* Check and update signature_type against what was actually used */
2633 if ((ret = get_sigtype(sig_blob, sig_len, &sigtype)) != 0)
2635 if (alg != NULL && strcmp(alg, sigtype) != 0) {
2636 ret = SSH_ERR_SIGN_ALG_UNSUPPORTED;
2639 if (k->cert->signature_type == NULL) {
2640 k->cert->signature_type = sigtype;
2643 /* Append signature and we are done */
2644 if ((ret = sshbuf_put_string(cert, sig_blob, sig_len)) != 0)
2653 sshbuf_free(principals);
2658 default_key_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
2659 const u_char *data, size_t datalen,
2660 const char *alg, u_int compat, void *ctx)
2663 return SSH_ERR_INVALID_ARGUMENT;
2664 return sshkey_sign(key, sigp, lenp, data, datalen, alg, compat);
2668 sshkey_certify(struct sshkey *k, struct sshkey *ca, const char *alg)
2670 return sshkey_certify_custom(k, ca, alg, default_key_sign, NULL);
2674 sshkey_cert_check_authority(const struct sshkey *k,
2675 int want_host, int require_principal,
2676 const char *name, const char **reason)
2678 u_int i, principal_matches;
2679 time_t now = time(NULL);
2685 if (k->cert->type != SSH2_CERT_TYPE_HOST) {
2686 *reason = "Certificate invalid: not a host certificate";
2687 return SSH_ERR_KEY_CERT_INVALID;
2690 if (k->cert->type != SSH2_CERT_TYPE_USER) {
2691 *reason = "Certificate invalid: not a user certificate";
2692 return SSH_ERR_KEY_CERT_INVALID;
2696 /* yikes - system clock before epoch! */
2697 *reason = "Certificate invalid: not yet valid";
2698 return SSH_ERR_KEY_CERT_INVALID;
2700 if ((u_int64_t)now < k->cert->valid_after) {
2701 *reason = "Certificate invalid: not yet valid";
2702 return SSH_ERR_KEY_CERT_INVALID;
2704 if ((u_int64_t)now >= k->cert->valid_before) {
2705 *reason = "Certificate invalid: expired";
2706 return SSH_ERR_KEY_CERT_INVALID;
2708 if (k->cert->nprincipals == 0) {
2709 if (require_principal) {
2710 *reason = "Certificate lacks principal list";
2711 return SSH_ERR_KEY_CERT_INVALID;
2713 } else if (name != NULL) {
2714 principal_matches = 0;
2715 for (i = 0; i < k->cert->nprincipals; i++) {
2716 if (strcmp(name, k->cert->principals[i]) == 0) {
2717 principal_matches = 1;
2721 if (!principal_matches) {
2722 *reason = "Certificate invalid: name is not a listed "
2724 return SSH_ERR_KEY_CERT_INVALID;
2731 sshkey_format_cert_validity(const struct sshkey_cert *cert, char *s, size_t l)
2733 char from[32], to[32], ret[64];
2738 if (cert->valid_after == 0 &&
2739 cert->valid_before == 0xffffffffffffffffULL)
2740 return strlcpy(s, "forever", l);
2742 if (cert->valid_after != 0) {
2743 /* XXX revisit INT_MAX in 2038 :) */
2744 tt = cert->valid_after > INT_MAX ?
2745 INT_MAX : cert->valid_after;
2746 tm = localtime(&tt);
2747 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
2749 if (cert->valid_before != 0xffffffffffffffffULL) {
2750 /* XXX revisit INT_MAX in 2038 :) */
2751 tt = cert->valid_before > INT_MAX ?
2752 INT_MAX : cert->valid_before;
2753 tm = localtime(&tt);
2754 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
2757 if (cert->valid_after == 0)
2758 snprintf(ret, sizeof(ret), "before %s", to);
2759 else if (cert->valid_before == 0xffffffffffffffffULL)
2760 snprintf(ret, sizeof(ret), "after %s", from);
2762 snprintf(ret, sizeof(ret), "from %s to %s", from, to);
2764 return strlcpy(s, ret, l);
2768 sshkey_private_serialize_opt(const struct sshkey *key, struct sshbuf *b,
2769 enum sshkey_serialize_rep opts)
2771 int r = SSH_ERR_INTERNAL_ERROR;
2773 const BIGNUM *rsa_n, *rsa_e, *rsa_d, *rsa_iqmp, *rsa_p, *rsa_q;
2774 const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key, *dsa_priv_key;
2775 #endif /* WITH_OPENSSL */
2777 if ((r = sshbuf_put_cstring(b, sshkey_ssh_name(key))) != 0)
2779 switch (key->type) {
2782 RSA_get0_key(key->rsa, &rsa_n, &rsa_e, &rsa_d);
2783 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2784 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2785 if ((r = sshbuf_put_bignum2(b, rsa_n)) != 0 ||
2786 (r = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
2787 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2788 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2789 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2790 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2794 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2795 r = SSH_ERR_INVALID_ARGUMENT;
2798 RSA_get0_key(key->rsa, NULL, NULL, &rsa_d);
2799 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2800 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2801 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2802 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2803 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2804 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2805 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2809 DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
2810 DSA_get0_key(key->dsa, &dsa_pub_key, &dsa_priv_key);
2811 if ((r = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
2812 (r = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
2813 (r = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
2814 (r = sshbuf_put_bignum2(b, dsa_pub_key)) != 0 ||
2815 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2819 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2820 r = SSH_ERR_INVALID_ARGUMENT;
2823 DSA_get0_key(key->dsa, NULL, &dsa_priv_key);
2824 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2825 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2828 # ifdef OPENSSL_HAS_ECC
2830 if ((r = sshbuf_put_cstring(b,
2831 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
2832 (r = sshbuf_put_eckey(b, key->ecdsa)) != 0 ||
2833 (r = sshbuf_put_bignum2(b,
2834 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2837 case KEY_ECDSA_CERT:
2838 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2839 r = SSH_ERR_INVALID_ARGUMENT;
2842 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2843 (r = sshbuf_put_bignum2(b,
2844 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2847 # endif /* OPENSSL_HAS_ECC */
2848 #endif /* WITH_OPENSSL */
2850 if ((r = sshbuf_put_string(b, key->ed25519_pk,
2851 ED25519_PK_SZ)) != 0 ||
2852 (r = sshbuf_put_string(b, key->ed25519_sk,
2853 ED25519_SK_SZ)) != 0)
2856 case KEY_ED25519_CERT:
2857 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2858 r = SSH_ERR_INVALID_ARGUMENT;
2861 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2862 (r = sshbuf_put_string(b, key->ed25519_pk,
2863 ED25519_PK_SZ)) != 0 ||
2864 (r = sshbuf_put_string(b, key->ed25519_sk,
2865 ED25519_SK_SZ)) != 0)
2870 if (key->xmss_name == NULL) {
2871 r = SSH_ERR_INVALID_ARGUMENT;
2874 if ((r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2875 (r = sshbuf_put_string(b, key->xmss_pk,
2876 sshkey_xmss_pklen(key))) != 0 ||
2877 (r = sshbuf_put_string(b, key->xmss_sk,
2878 sshkey_xmss_sklen(key))) != 0 ||
2879 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2883 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0 ||
2884 key->xmss_name == NULL) {
2885 r = SSH_ERR_INVALID_ARGUMENT;
2888 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2889 (r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2890 (r = sshbuf_put_string(b, key->xmss_pk,
2891 sshkey_xmss_pklen(key))) != 0 ||
2892 (r = sshbuf_put_string(b, key->xmss_sk,
2893 sshkey_xmss_sklen(key))) != 0 ||
2894 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2897 #endif /* WITH_XMSS */
2899 r = SSH_ERR_INVALID_ARGUMENT;
2909 sshkey_private_serialize(const struct sshkey *key, struct sshbuf *b)
2911 return sshkey_private_serialize_opt(key, b,
2912 SSHKEY_SERIALIZE_DEFAULT);
2916 sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
2918 char *tname = NULL, *curve = NULL, *xmss_name = NULL;
2919 struct sshkey *k = NULL;
2920 size_t pklen = 0, sklen = 0;
2921 int type, r = SSH_ERR_INTERNAL_ERROR;
2922 u_char *ed25519_pk = NULL, *ed25519_sk = NULL;
2923 u_char *xmss_pk = NULL, *xmss_sk = NULL;
2925 BIGNUM *exponent = NULL;
2926 BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
2927 BIGNUM *rsa_iqmp = NULL, *rsa_p = NULL, *rsa_q = NULL;
2928 BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
2929 BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
2930 #endif /* WITH_OPENSSL */
2934 if ((r = sshbuf_get_cstring(buf, &tname, NULL)) != 0)
2936 type = sshkey_type_from_name(tname);
2940 if ((k = sshkey_new(type)) == NULL) {
2941 r = SSH_ERR_ALLOC_FAIL;
2944 if ((dsa_p = BN_new()) == NULL ||
2945 (dsa_q = BN_new()) == NULL ||
2946 (dsa_g = BN_new()) == NULL ||
2947 (dsa_pub_key = BN_new()) == NULL ||
2948 (dsa_priv_key = BN_new()) == NULL) {
2949 r = SSH_ERR_ALLOC_FAIL;
2952 if ((r = sshbuf_get_bignum2(buf, dsa_p)) != 0 ||
2953 (r = sshbuf_get_bignum2(buf, dsa_q)) != 0 ||
2954 (r = sshbuf_get_bignum2(buf, dsa_g)) != 0 ||
2955 (r = sshbuf_get_bignum2(buf, dsa_pub_key)) != 0 ||
2956 (r = sshbuf_get_bignum2(buf, dsa_priv_key)) != 0)
2958 if (!DSA_set0_pqg(k->dsa, dsa_p, dsa_q, dsa_g)) {
2959 r = SSH_ERR_LIBCRYPTO_ERROR;
2962 dsa_p = dsa_q = dsa_g = NULL; /* transferred */
2963 if (!DSA_set0_key(k->dsa, dsa_pub_key, dsa_priv_key)) {
2964 r = SSH_ERR_LIBCRYPTO_ERROR;
2967 dsa_pub_key = dsa_priv_key = NULL; /* transferred */
2970 if ((dsa_priv_key = BN_new()) == NULL) {
2971 r = SSH_ERR_ALLOC_FAIL;
2974 if ((r = sshkey_froms(buf, &k)) != 0 ||
2975 (r = sshbuf_get_bignum2(buf, dsa_priv_key)) != 0)
2977 if (!DSA_set0_key(k->dsa, NULL, dsa_priv_key)) {
2978 r = SSH_ERR_LIBCRYPTO_ERROR;
2981 dsa_priv_key = NULL; /* transferred */
2983 # ifdef OPENSSL_HAS_ECC
2985 if ((k = sshkey_new(type)) == NULL) {
2986 r = SSH_ERR_ALLOC_FAIL;
2989 if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) {
2990 r = SSH_ERR_INVALID_ARGUMENT;
2993 if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0)
2995 if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
2996 r = SSH_ERR_EC_CURVE_MISMATCH;
2999 k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
3000 if (k->ecdsa == NULL || (exponent = BN_new()) == NULL) {
3001 r = SSH_ERR_LIBCRYPTO_ERROR;
3004 if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 ||
3005 (r = sshbuf_get_bignum2(buf, exponent)))
3007 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
3008 r = SSH_ERR_LIBCRYPTO_ERROR;
3011 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
3012 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
3013 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
3016 case KEY_ECDSA_CERT:
3017 if ((exponent = BN_new()) == NULL) {
3018 r = SSH_ERR_LIBCRYPTO_ERROR;
3021 if ((r = sshkey_froms(buf, &k)) != 0 ||
3022 (r = sshbuf_get_bignum2(buf, exponent)) != 0)
3024 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
3025 r = SSH_ERR_LIBCRYPTO_ERROR;
3028 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
3029 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
3030 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
3033 # endif /* OPENSSL_HAS_ECC */
3035 if ((k = sshkey_new(type)) == NULL) {
3036 r = SSH_ERR_ALLOC_FAIL;
3039 if ((rsa_n = BN_new()) == NULL ||
3040 (rsa_e = BN_new()) == NULL ||
3041 (rsa_d = BN_new()) == NULL ||
3042 (rsa_iqmp = BN_new()) == NULL ||
3043 (rsa_p = BN_new()) == NULL ||
3044 (rsa_q = BN_new()) == NULL) {
3045 r = SSH_ERR_ALLOC_FAIL;
3048 if ((r = sshbuf_get_bignum2(buf, rsa_n)) != 0 ||
3049 (r = sshbuf_get_bignum2(buf, rsa_e)) != 0 ||
3050 (r = sshbuf_get_bignum2(buf, rsa_d)) != 0 ||
3051 (r = sshbuf_get_bignum2(buf, rsa_iqmp)) != 0 ||
3052 (r = sshbuf_get_bignum2(buf, rsa_p)) != 0 ||
3053 (r = sshbuf_get_bignum2(buf, rsa_q)) != 0)
3055 if (!RSA_set0_key(k->rsa, rsa_n, rsa_e, rsa_d)) {
3056 r = SSH_ERR_LIBCRYPTO_ERROR;
3059 rsa_n = rsa_e = rsa_d = NULL; /* transferred */
3060 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3061 r = SSH_ERR_LIBCRYPTO_ERROR;
3064 rsa_p = rsa_q = NULL; /* transferred */
3065 if ((r = check_rsa_length(k->rsa)) != 0)
3067 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3071 if ((rsa_d = BN_new()) == NULL ||
3072 (rsa_iqmp = BN_new()) == NULL ||
3073 (rsa_p = BN_new()) == NULL ||
3074 (rsa_q = BN_new()) == NULL) {
3075 r = SSH_ERR_ALLOC_FAIL;
3078 if ((r = sshkey_froms(buf, &k)) != 0 ||
3079 (r = sshbuf_get_bignum2(buf, rsa_d)) != 0 ||
3080 (r = sshbuf_get_bignum2(buf, rsa_iqmp)) != 0 ||
3081 (r = sshbuf_get_bignum2(buf, rsa_p)) != 0 ||
3082 (r = sshbuf_get_bignum2(buf, rsa_q)) != 0)
3084 if (!RSA_set0_key(k->rsa, NULL, NULL, rsa_d)) {
3085 r = SSH_ERR_LIBCRYPTO_ERROR;
3088 rsa_d = NULL; /* transferred */
3089 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3090 r = SSH_ERR_LIBCRYPTO_ERROR;
3093 rsa_p = rsa_q = NULL; /* transferred */
3094 if ((r = check_rsa_length(k->rsa)) != 0)
3096 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3099 #endif /* WITH_OPENSSL */
3101 if ((k = sshkey_new(type)) == NULL) {
3102 r = SSH_ERR_ALLOC_FAIL;
3105 if ((r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3106 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3108 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3109 r = SSH_ERR_INVALID_FORMAT;
3112 k->ed25519_pk = ed25519_pk;
3113 k->ed25519_sk = ed25519_sk;
3114 ed25519_pk = ed25519_sk = NULL;
3116 case KEY_ED25519_CERT:
3117 if ((r = sshkey_froms(buf, &k)) != 0 ||
3118 (r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3119 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3121 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3122 r = SSH_ERR_INVALID_FORMAT;
3125 k->ed25519_pk = ed25519_pk;
3126 k->ed25519_sk = ed25519_sk;
3127 ed25519_pk = ed25519_sk = NULL;
3131 if ((k = sshkey_new(type)) == NULL) {
3132 r = SSH_ERR_ALLOC_FAIL;
3135 if ((r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3136 (r = sshkey_xmss_init(k, xmss_name)) != 0 ||
3137 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3138 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3140 if (pklen != sshkey_xmss_pklen(k) ||
3141 sklen != sshkey_xmss_sklen(k)) {
3142 r = SSH_ERR_INVALID_FORMAT;
3145 k->xmss_pk = xmss_pk;
3146 k->xmss_sk = xmss_sk;
3147 xmss_pk = xmss_sk = NULL;
3148 /* optional internal state */
3149 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3153 if ((r = sshkey_froms(buf, &k)) != 0 ||
3154 (r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3155 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3156 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3158 if (strcmp(xmss_name, k->xmss_name)) {
3159 r = SSH_ERR_INVALID_FORMAT;
3162 if (pklen != sshkey_xmss_pklen(k) ||
3163 sklen != sshkey_xmss_sklen(k)) {
3164 r = SSH_ERR_INVALID_FORMAT;
3167 k->xmss_pk = xmss_pk;
3168 k->xmss_sk = xmss_sk;
3169 xmss_pk = xmss_sk = NULL;
3170 /* optional internal state */
3171 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3174 #endif /* WITH_XMSS */
3176 r = SSH_ERR_KEY_TYPE_UNKNOWN;
3180 /* enable blinding */
3184 if (RSA_blinding_on(k->rsa, NULL) != 1) {
3185 r = SSH_ERR_LIBCRYPTO_ERROR;
3190 #endif /* WITH_OPENSSL */
3201 BN_clear_free(exponent);
3202 BN_clear_free(dsa_p);
3203 BN_clear_free(dsa_q);
3204 BN_clear_free(dsa_g);
3205 BN_clear_free(dsa_pub_key);
3206 BN_clear_free(dsa_priv_key);
3207 BN_clear_free(rsa_n);
3208 BN_clear_free(rsa_e);
3209 BN_clear_free(rsa_d);
3210 BN_clear_free(rsa_p);
3211 BN_clear_free(rsa_q);
3212 BN_clear_free(rsa_iqmp);
3213 #endif /* WITH_OPENSSL */
3215 freezero(ed25519_pk, pklen);
3216 freezero(ed25519_sk, sklen);
3218 freezero(xmss_pk, pklen);
3219 freezero(xmss_sk, sklen);
3223 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
3225 sshkey_ec_validate_public(const EC_GROUP *group, const EC_POINT *public)
3228 EC_POINT *nq = NULL;
3229 BIGNUM *order, *x, *y, *tmp;
3230 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3233 * NB. This assumes OpenSSL has already verified that the public
3234 * point lies on the curve. This is done by EC_POINT_oct2point()
3235 * implicitly calling EC_POINT_is_on_curve(). If this code is ever
3236 * reachable with public points not unmarshalled using
3237 * EC_POINT_oct2point then the caller will need to explicitly check.
3240 if ((bnctx = BN_CTX_new()) == NULL)
3241 return SSH_ERR_ALLOC_FAIL;
3242 BN_CTX_start(bnctx);
3245 * We shouldn't ever hit this case because bignum_get_ecpoint()
3246 * refuses to load GF2m points.
3248 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3249 NID_X9_62_prime_field)
3253 if (EC_POINT_is_at_infinity(group, public))
3256 if ((x = BN_CTX_get(bnctx)) == NULL ||
3257 (y = BN_CTX_get(bnctx)) == NULL ||
3258 (order = BN_CTX_get(bnctx)) == NULL ||
3259 (tmp = BN_CTX_get(bnctx)) == NULL) {
3260 ret = SSH_ERR_ALLOC_FAIL;
3264 /* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */
3265 if (EC_GROUP_get_order(group, order, bnctx) != 1 ||
3266 EC_POINT_get_affine_coordinates_GFp(group, public,
3267 x, y, bnctx) != 1) {
3268 ret = SSH_ERR_LIBCRYPTO_ERROR;
3271 if (BN_num_bits(x) <= BN_num_bits(order) / 2 ||
3272 BN_num_bits(y) <= BN_num_bits(order) / 2)
3275 /* nQ == infinity (n == order of subgroup) */
3276 if ((nq = EC_POINT_new(group)) == NULL) {
3277 ret = SSH_ERR_ALLOC_FAIL;
3280 if (EC_POINT_mul(group, nq, NULL, public, order, bnctx) != 1) {
3281 ret = SSH_ERR_LIBCRYPTO_ERROR;
3284 if (EC_POINT_is_at_infinity(group, nq) != 1)
3287 /* x < order - 1, y < order - 1 */
3288 if (!BN_sub(tmp, order, BN_value_one())) {
3289 ret = SSH_ERR_LIBCRYPTO_ERROR;
3292 if (BN_cmp(x, tmp) >= 0 || BN_cmp(y, tmp) >= 0)
3302 sshkey_ec_validate_private(const EC_KEY *key)
3305 BIGNUM *order, *tmp;
3306 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3308 if ((bnctx = BN_CTX_new()) == NULL)
3309 return SSH_ERR_ALLOC_FAIL;
3310 BN_CTX_start(bnctx);
3312 if ((order = BN_CTX_get(bnctx)) == NULL ||
3313 (tmp = BN_CTX_get(bnctx)) == NULL) {
3314 ret = SSH_ERR_ALLOC_FAIL;
3318 /* log2(private) > log2(order)/2 */
3319 if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, bnctx) != 1) {
3320 ret = SSH_ERR_LIBCRYPTO_ERROR;
3323 if (BN_num_bits(EC_KEY_get0_private_key(key)) <=
3324 BN_num_bits(order) / 2)
3327 /* private < order - 1 */
3328 if (!BN_sub(tmp, order, BN_value_one())) {
3329 ret = SSH_ERR_LIBCRYPTO_ERROR;
3332 if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0)
3341 sshkey_dump_ec_point(const EC_GROUP *group, const EC_POINT *point)
3346 if (point == NULL) {
3347 fputs("point=(NULL)\n", stderr);
3350 if ((bnctx = BN_CTX_new()) == NULL) {
3351 fprintf(stderr, "%s: BN_CTX_new failed\n", __func__);
3354 BN_CTX_start(bnctx);
3355 if ((x = BN_CTX_get(bnctx)) == NULL ||
3356 (y = BN_CTX_get(bnctx)) == NULL) {
3357 fprintf(stderr, "%s: BN_CTX_get failed\n", __func__);
3360 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3361 NID_X9_62_prime_field) {
3362 fprintf(stderr, "%s: group is not a prime field\n", __func__);
3365 if (EC_POINT_get_affine_coordinates_GFp(group, point, x, y,
3367 fprintf(stderr, "%s: EC_POINT_get_affine_coordinates_GFp\n",
3371 fputs("x=", stderr);
3372 BN_print_fp(stderr, x);
3373 fputs("\ny=", stderr);
3374 BN_print_fp(stderr, y);
3375 fputs("\n", stderr);
3380 sshkey_dump_ec_key(const EC_KEY *key)
3382 const BIGNUM *exponent;
3384 sshkey_dump_ec_point(EC_KEY_get0_group(key),
3385 EC_KEY_get0_public_key(key));
3386 fputs("exponent=", stderr);
3387 if ((exponent = EC_KEY_get0_private_key(key)) == NULL)
3388 fputs("(NULL)", stderr);
3390 BN_print_fp(stderr, EC_KEY_get0_private_key(key));
3391 fputs("\n", stderr);
3393 #endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */
3396 sshkey_private_to_blob2(const struct sshkey *prv, struct sshbuf *blob,
3397 const char *passphrase, const char *comment, const char *ciphername,
3400 u_char *cp, *key = NULL, *pubkeyblob = NULL;
3401 u_char salt[SALT_LEN];
3403 size_t i, pubkeylen, keylen, ivlen, blocksize, authlen;
3405 int r = SSH_ERR_INTERNAL_ERROR;
3406 struct sshcipher_ctx *ciphercontext = NULL;
3407 const struct sshcipher *cipher;
3408 const char *kdfname = KDFNAME;
3409 struct sshbuf *encoded = NULL, *encrypted = NULL, *kdf = NULL;
3412 rounds = DEFAULT_ROUNDS;
3413 if (passphrase == NULL || !strlen(passphrase)) {
3414 ciphername = "none";
3416 } else if (ciphername == NULL)
3417 ciphername = DEFAULT_CIPHERNAME;
3418 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3419 r = SSH_ERR_INVALID_ARGUMENT;
3423 if ((kdf = sshbuf_new()) == NULL ||
3424 (encoded = sshbuf_new()) == NULL ||
3425 (encrypted = sshbuf_new()) == NULL) {
3426 r = SSH_ERR_ALLOC_FAIL;
3429 blocksize = cipher_blocksize(cipher);
3430 keylen = cipher_keylen(cipher);
3431 ivlen = cipher_ivlen(cipher);
3432 authlen = cipher_authlen(cipher);
3433 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3434 r = SSH_ERR_ALLOC_FAIL;
3437 if (strcmp(kdfname, "bcrypt") == 0) {
3438 arc4random_buf(salt, SALT_LEN);
3439 if (bcrypt_pbkdf(passphrase, strlen(passphrase),
3440 salt, SALT_LEN, key, keylen + ivlen, rounds) < 0) {
3441 r = SSH_ERR_INVALID_ARGUMENT;
3444 if ((r = sshbuf_put_string(kdf, salt, SALT_LEN)) != 0 ||
3445 (r = sshbuf_put_u32(kdf, rounds)) != 0)
3447 } else if (strcmp(kdfname, "none") != 0) {
3448 /* Unsupported KDF type */
3449 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3452 if ((r = cipher_init(&ciphercontext, cipher, key, keylen,
3453 key + keylen, ivlen, 1)) != 0)
3456 if ((r = sshbuf_put(encoded, AUTH_MAGIC, sizeof(AUTH_MAGIC))) != 0 ||
3457 (r = sshbuf_put_cstring(encoded, ciphername)) != 0 ||
3458 (r = sshbuf_put_cstring(encoded, kdfname)) != 0 ||
3459 (r = sshbuf_put_stringb(encoded, kdf)) != 0 ||
3460 (r = sshbuf_put_u32(encoded, 1)) != 0 || /* number of keys */
3461 (r = sshkey_to_blob(prv, &pubkeyblob, &pubkeylen)) != 0 ||
3462 (r = sshbuf_put_string(encoded, pubkeyblob, pubkeylen)) != 0)
3465 /* set up the buffer that will be encrypted */
3467 /* Random check bytes */
3468 check = arc4random();
3469 if ((r = sshbuf_put_u32(encrypted, check)) != 0 ||
3470 (r = sshbuf_put_u32(encrypted, check)) != 0)
3473 /* append private key and comment*/
3474 if ((r = sshkey_private_serialize_opt(prv, encrypted,
3475 SSHKEY_SERIALIZE_FULL)) != 0 ||
3476 (r = sshbuf_put_cstring(encrypted, comment)) != 0)
3481 while (sshbuf_len(encrypted) % blocksize) {
3482 if ((r = sshbuf_put_u8(encrypted, ++i & 0xff)) != 0)
3486 /* length in destination buffer */
3487 if ((r = sshbuf_put_u32(encoded, sshbuf_len(encrypted))) != 0)
3491 if ((r = sshbuf_reserve(encoded,
3492 sshbuf_len(encrypted) + authlen, &cp)) != 0)
3494 if ((r = cipher_crypt(ciphercontext, 0, cp,
3495 sshbuf_ptr(encrypted), sshbuf_len(encrypted), 0, authlen)) != 0)
3499 if ((b64 = sshbuf_dtob64(encoded)) == NULL) {
3500 r = SSH_ERR_ALLOC_FAIL;
3505 if ((r = sshbuf_put(blob, MARK_BEGIN, MARK_BEGIN_LEN)) != 0)
3507 for (i = 0; i < strlen(b64); i++) {
3508 if ((r = sshbuf_put_u8(blob, b64[i])) != 0)
3510 /* insert line breaks */
3511 if (i % 70 == 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3514 if (i % 70 != 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3516 if ((r = sshbuf_put(blob, MARK_END, MARK_END_LEN)) != 0)
3524 sshbuf_free(encoded);
3525 sshbuf_free(encrypted);
3526 cipher_free(ciphercontext);
3527 explicit_bzero(salt, sizeof(salt));
3529 explicit_bzero(key, keylen + ivlen);
3532 if (pubkeyblob != NULL) {
3533 explicit_bzero(pubkeyblob, pubkeylen);
3537 explicit_bzero(b64, strlen(b64));
3544 sshkey_parse_private2(struct sshbuf *blob, int type, const char *passphrase,
3545 struct sshkey **keyp, char **commentp)
3547 char *comment = NULL, *ciphername = NULL, *kdfname = NULL;
3548 const struct sshcipher *cipher = NULL;
3550 int r = SSH_ERR_INTERNAL_ERROR;
3552 size_t i, keylen = 0, ivlen = 0, authlen = 0, slen = 0;
3553 struct sshbuf *encoded = NULL, *decoded = NULL;
3554 struct sshbuf *kdf = NULL, *decrypted = NULL;
3555 struct sshcipher_ctx *ciphercontext = NULL;
3556 struct sshkey *k = NULL;
3557 u_char *key = NULL, *salt = NULL, *dp, pad, last;
3558 u_int blocksize, rounds, nkeys, encrypted_len, check1, check2;
3562 if (commentp != NULL)
3565 if ((encoded = sshbuf_new()) == NULL ||
3566 (decoded = sshbuf_new()) == NULL ||
3567 (decrypted = sshbuf_new()) == NULL) {
3568 r = SSH_ERR_ALLOC_FAIL;
3572 /* check preamble */
3573 cp = sshbuf_ptr(blob);
3574 encoded_len = sshbuf_len(blob);
3575 if (encoded_len < (MARK_BEGIN_LEN + MARK_END_LEN) ||
3576 memcmp(cp, MARK_BEGIN, MARK_BEGIN_LEN) != 0) {
3577 r = SSH_ERR_INVALID_FORMAT;
3580 cp += MARK_BEGIN_LEN;
3581 encoded_len -= MARK_BEGIN_LEN;
3583 /* Look for end marker, removing whitespace as we go */
3584 while (encoded_len > 0) {
3585 if (*cp != '\n' && *cp != '\r') {
3586 if ((r = sshbuf_put_u8(encoded, *cp)) != 0)
3593 if (encoded_len >= MARK_END_LEN &&
3594 memcmp(cp, MARK_END, MARK_END_LEN) == 0) {
3596 if ((r = sshbuf_put_u8(encoded, 0)) != 0)
3602 if (encoded_len == 0) {
3603 r = SSH_ERR_INVALID_FORMAT;
3608 if ((r = sshbuf_b64tod(decoded, (char *)sshbuf_ptr(encoded))) != 0)
3612 if (sshbuf_len(decoded) < sizeof(AUTH_MAGIC) ||
3613 memcmp(sshbuf_ptr(decoded), AUTH_MAGIC, sizeof(AUTH_MAGIC))) {
3614 r = SSH_ERR_INVALID_FORMAT;
3617 /* parse public portion of key */
3618 if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 ||
3619 (r = sshbuf_get_cstring(decoded, &ciphername, NULL)) != 0 ||
3620 (r = sshbuf_get_cstring(decoded, &kdfname, NULL)) != 0 ||
3621 (r = sshbuf_froms(decoded, &kdf)) != 0 ||
3622 (r = sshbuf_get_u32(decoded, &nkeys)) != 0 ||
3623 (r = sshbuf_skip_string(decoded)) != 0 || /* pubkey */
3624 (r = sshbuf_get_u32(decoded, &encrypted_len)) != 0)
3627 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3628 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3631 if ((passphrase == NULL || strlen(passphrase) == 0) &&
3632 strcmp(ciphername, "none") != 0) {
3633 /* passphrase required */
3634 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3637 if (strcmp(kdfname, "none") != 0 && strcmp(kdfname, "bcrypt") != 0) {
3638 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3641 if (!strcmp(kdfname, "none") && strcmp(ciphername, "none") != 0) {
3642 r = SSH_ERR_INVALID_FORMAT;
3646 /* XXX only one key supported */
3647 r = SSH_ERR_INVALID_FORMAT;
3651 /* check size of encrypted key blob */
3652 blocksize = cipher_blocksize(cipher);
3653 if (encrypted_len < blocksize || (encrypted_len % blocksize) != 0) {
3654 r = SSH_ERR_INVALID_FORMAT;
3659 keylen = cipher_keylen(cipher);
3660 ivlen = cipher_ivlen(cipher);
3661 authlen = cipher_authlen(cipher);
3662 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3663 r = SSH_ERR_ALLOC_FAIL;
3666 if (strcmp(kdfname, "bcrypt") == 0) {
3667 if ((r = sshbuf_get_string(kdf, &salt, &slen)) != 0 ||
3668 (r = sshbuf_get_u32(kdf, &rounds)) != 0)
3670 if (bcrypt_pbkdf(passphrase, strlen(passphrase), salt, slen,
3671 key, keylen + ivlen, rounds) < 0) {
3672 r = SSH_ERR_INVALID_FORMAT;
3677 /* check that an appropriate amount of auth data is present */
3678 if (sshbuf_len(decoded) < encrypted_len + authlen) {
3679 r = SSH_ERR_INVALID_FORMAT;
3683 /* decrypt private portion of key */
3684 if ((r = sshbuf_reserve(decrypted, encrypted_len, &dp)) != 0 ||
3685 (r = cipher_init(&ciphercontext, cipher, key, keylen,
3686 key + keylen, ivlen, 0)) != 0)
3688 if ((r = cipher_crypt(ciphercontext, 0, dp, sshbuf_ptr(decoded),
3689 encrypted_len, 0, authlen)) != 0) {
3690 /* an integrity error here indicates an incorrect passphrase */
3691 if (r == SSH_ERR_MAC_INVALID)
3692 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3695 if ((r = sshbuf_consume(decoded, encrypted_len + authlen)) != 0)
3697 /* there should be no trailing data */
3698 if (sshbuf_len(decoded) != 0) {
3699 r = SSH_ERR_INVALID_FORMAT;
3703 /* check check bytes */
3704 if ((r = sshbuf_get_u32(decrypted, &check1)) != 0 ||
3705 (r = sshbuf_get_u32(decrypted, &check2)) != 0)
3707 if (check1 != check2) {
3708 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3712 /* Load the private key and comment */
3713 if ((r = sshkey_private_deserialize(decrypted, &k)) != 0 ||
3714 (r = sshbuf_get_cstring(decrypted, &comment, NULL)) != 0)
3717 /* Check deterministic padding */
3719 while (sshbuf_len(decrypted)) {
3720 if ((r = sshbuf_get_u8(decrypted, &pad)) != 0)
3722 if (pad != (++i & 0xff)) {
3723 r = SSH_ERR_INVALID_FORMAT;
3728 /* XXX decode pubkey and check against private */
3736 if (commentp != NULL) {
3737 *commentp = comment;
3742 cipher_free(ciphercontext);
3747 explicit_bzero(salt, slen);
3751 explicit_bzero(key, keylen + ivlen);
3754 sshbuf_free(encoded);
3755 sshbuf_free(decoded);
3757 sshbuf_free(decrypted);
3764 /* convert SSH v2 key in OpenSSL PEM format */
3766 sshkey_private_pem_to_blob(struct sshkey *key, struct sshbuf *blob,
3767 const char *_passphrase, const char *comment)
3770 int blen, len = strlen(_passphrase);
3771 u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
3772 const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL;
3776 if (len > 0 && len <= 4)
3777 return SSH_ERR_PASSPHRASE_TOO_SHORT;
3778 if ((bio = BIO_new(BIO_s_mem())) == NULL)
3779 return SSH_ERR_ALLOC_FAIL;
3781 switch (key->type) {
3783 success = PEM_write_bio_DSAPrivateKey(bio, key->dsa,
3784 cipher, passphrase, len, NULL, NULL);
3786 #ifdef OPENSSL_HAS_ECC
3788 success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa,
3789 cipher, passphrase, len, NULL, NULL);
3793 success = PEM_write_bio_RSAPrivateKey(bio, key->rsa,
3794 cipher, passphrase, len, NULL, NULL);
3801 r = SSH_ERR_LIBCRYPTO_ERROR;
3804 if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) {
3805 r = SSH_ERR_INTERNAL_ERROR;
3808 if ((r = sshbuf_put(blob, bptr, blen)) != 0)
3815 #endif /* WITH_OPENSSL */
3817 /* Serialise "key" to buffer "blob" */
3819 sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
3820 const char *passphrase, const char *comment,
3821 int force_new_format, const char *new_format_cipher, int new_format_rounds)
3823 switch (key->type) {
3828 if (force_new_format) {
3829 return sshkey_private_to_blob2(key, blob, passphrase,
3830 comment, new_format_cipher, new_format_rounds);
3832 return sshkey_private_pem_to_blob(key, blob,
3833 passphrase, comment);
3834 #endif /* WITH_OPENSSL */
3838 #endif /* WITH_XMSS */
3839 return sshkey_private_to_blob2(key, blob, passphrase,
3840 comment, new_format_cipher, new_format_rounds);
3842 return SSH_ERR_KEY_TYPE_UNKNOWN;
3849 translate_libcrypto_error(unsigned long pem_err)
3851 int pem_reason = ERR_GET_REASON(pem_err);
3853 switch (ERR_GET_LIB(pem_err)) {
3855 switch (pem_reason) {
3856 case PEM_R_BAD_PASSWORD_READ:
3857 case PEM_R_PROBLEMS_GETTING_PASSWORD:
3858 case PEM_R_BAD_DECRYPT:
3859 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3861 return SSH_ERR_INVALID_FORMAT;
3864 switch (pem_reason) {
3865 case EVP_R_BAD_DECRYPT:
3866 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3867 #ifdef EVP_R_BN_DECODE_ERROR
3868 case EVP_R_BN_DECODE_ERROR:
3870 case EVP_R_DECODE_ERROR:
3871 #ifdef EVP_R_PRIVATE_KEY_DECODE_ERROR
3872 case EVP_R_PRIVATE_KEY_DECODE_ERROR:
3874 return SSH_ERR_INVALID_FORMAT;
3876 return SSH_ERR_LIBCRYPTO_ERROR;
3879 return SSH_ERR_INVALID_FORMAT;
3881 return SSH_ERR_LIBCRYPTO_ERROR;
3885 clear_libcrypto_errors(void)
3887 while (ERR_get_error() != 0)
3892 * Translate OpenSSL error codes to determine whether
3893 * passphrase is required/incorrect.
3896 convert_libcrypto_error(void)
3899 * Some password errors are reported at the beginning
3900 * of the error queue.
3902 if (translate_libcrypto_error(ERR_peek_error()) ==
3903 SSH_ERR_KEY_WRONG_PASSPHRASE)
3904 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3905 return translate_libcrypto_error(ERR_peek_last_error());
3909 pem_passphrase_cb(char *buf, int size, int rwflag, void *u)
3911 char *p = (char *)u;
3914 if (p == NULL || (len = strlen(p)) == 0)
3916 if (size < 0 || len > (size_t)size)
3918 memcpy(buf, p, len);
3923 sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
3924 const char *passphrase, struct sshkey **keyp)
3926 EVP_PKEY *pk = NULL;
3927 struct sshkey *prv = NULL;
3934 if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX)
3935 return SSH_ERR_ALLOC_FAIL;
3936 if (BIO_write(bio, sshbuf_ptr(blob), sshbuf_len(blob)) !=
3937 (int)sshbuf_len(blob)) {
3938 r = SSH_ERR_ALLOC_FAIL;
3942 clear_libcrypto_errors();
3943 if ((pk = PEM_read_bio_PrivateKey(bio, NULL, pem_passphrase_cb,
3944 (char *)passphrase)) == NULL) {
3946 * libcrypto may return various ASN.1 errors when attempting
3947 * to parse a key with an incorrect passphrase.
3948 * Treat all format errors as "incorrect passphrase" if a
3949 * passphrase was supplied.
3951 if (passphrase != NULL && *passphrase != '\0')
3952 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3954 r = convert_libcrypto_error();
3957 if (EVP_PKEY_base_id(pk) == EVP_PKEY_RSA &&
3958 (type == KEY_UNSPEC || type == KEY_RSA)) {
3959 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3960 r = SSH_ERR_ALLOC_FAIL;
3963 prv->rsa = EVP_PKEY_get1_RSA(pk);
3964 prv->type = KEY_RSA;
3966 RSA_print_fp(stderr, prv->rsa, 8);
3968 if (RSA_blinding_on(prv->rsa, NULL) != 1) {
3969 r = SSH_ERR_LIBCRYPTO_ERROR;
3972 if ((r = check_rsa_length(prv->rsa)) != 0)
3974 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_DSA &&
3975 (type == KEY_UNSPEC || type == KEY_DSA)) {
3976 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3977 r = SSH_ERR_ALLOC_FAIL;
3980 prv->dsa = EVP_PKEY_get1_DSA(pk);
3981 prv->type = KEY_DSA;
3983 DSA_print_fp(stderr, prv->dsa, 8);
3985 #ifdef OPENSSL_HAS_ECC
3986 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_EC &&
3987 (type == KEY_UNSPEC || type == KEY_ECDSA)) {
3988 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3989 r = SSH_ERR_ALLOC_FAIL;
3992 prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk);
3993 prv->type = KEY_ECDSA;
3994 prv->ecdsa_nid = sshkey_ecdsa_key_to_nid(prv->ecdsa);
3995 if (prv->ecdsa_nid == -1 ||
3996 sshkey_curve_nid_to_name(prv->ecdsa_nid) == NULL ||
3997 sshkey_ec_validate_public(EC_KEY_get0_group(prv->ecdsa),
3998 EC_KEY_get0_public_key(prv->ecdsa)) != 0 ||
3999 sshkey_ec_validate_private(prv->ecdsa) != 0) {
4000 r = SSH_ERR_INVALID_FORMAT;
4004 if (prv != NULL && prv->ecdsa != NULL)
4005 sshkey_dump_ec_key(prv->ecdsa);
4007 #endif /* OPENSSL_HAS_ECC */
4009 r = SSH_ERR_INVALID_FORMAT;
4023 #endif /* WITH_OPENSSL */
4026 sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
4027 const char *passphrase, struct sshkey **keyp, char **commentp)
4029 int r = SSH_ERR_INTERNAL_ERROR;
4033 if (commentp != NULL)
4041 return sshkey_parse_private_pem_fileblob(blob, type,
4043 #endif /* WITH_OPENSSL */
4047 #endif /* WITH_XMSS */
4048 return sshkey_parse_private2(blob, type, passphrase,
4051 r = sshkey_parse_private2(blob, type, passphrase, keyp,
4053 /* Do not fallback to PEM parser if only passphrase is wrong. */
4054 if (r == 0 || r == SSH_ERR_KEY_WRONG_PASSPHRASE)
4057 return sshkey_parse_private_pem_fileblob(blob, type,
4060 return SSH_ERR_INVALID_FORMAT;
4061 #endif /* WITH_OPENSSL */
4063 return SSH_ERR_KEY_TYPE_UNKNOWN;
4068 sshkey_parse_private_fileblob(struct sshbuf *buffer, const char *passphrase,
4069 struct sshkey **keyp, char **commentp)
4073 if (commentp != NULL)
4076 return sshkey_parse_private_fileblob_type(buffer, KEY_UNSPEC,
4077 passphrase, keyp, commentp);
4082 * serialize the key with the current state and forward the state
4086 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4087 u_int32_t maxsign, sshkey_printfn *pr)
4092 sshkey_type_plain(k->type) != KEY_XMSS)
4093 return sshkey_private_serialize_opt(k, b,
4094 SSHKEY_SERIALIZE_DEFAULT);
4095 if ((r = sshkey_xmss_get_state(k, pr)) != 0 ||
4096 (r = sshkey_private_serialize_opt(k, b,
4097 SSHKEY_SERIALIZE_STATE)) != 0 ||
4098 (r = sshkey_xmss_forward_state(k, maxsign)) != 0)
4102 if ((rupdate = sshkey_xmss_update_state(k, pr)) != 0) {
4110 sshkey_signatures_left(const struct sshkey *k)
4112 if (sshkey_type_plain(k->type) == KEY_XMSS)
4113 return sshkey_xmss_signatures_left(k);
4118 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4120 if (sshkey_type_plain(k->type) != KEY_XMSS)
4121 return SSH_ERR_INVALID_ARGUMENT;
4122 return sshkey_xmss_enable_maxsign(k, maxsign);
4126 sshkey_set_filename(struct sshkey *k, const char *filename)
4129 return SSH_ERR_INVALID_ARGUMENT;
4130 if (sshkey_type_plain(k->type) != KEY_XMSS)
4132 if (filename == NULL)
4133 return SSH_ERR_INVALID_ARGUMENT;
4134 if ((k->xmss_filename = strdup(filename)) == NULL)
4135 return SSH_ERR_ALLOC_FAIL;
4140 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4141 u_int32_t maxsign, sshkey_printfn *pr)
4143 return sshkey_private_serialize_opt(k, b, SSHKEY_SERIALIZE_DEFAULT);
4147 sshkey_signatures_left(const struct sshkey *k)
4153 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4155 return SSH_ERR_INVALID_ARGUMENT;
4159 sshkey_set_filename(struct sshkey *k, const char *filename)
4162 return SSH_ERR_INVALID_ARGUMENT;
4165 #endif /* WITH_XMSS */