1 /* $OpenBSD: sshkey.c,v 1.73 2019/01/21 09:54:11 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 (sshbuf_get_bignum2(b, &rsa_e) != 0 ||
2060 sshbuf_get_bignum2(b, &rsa_n) != 0) {
2061 ret = SSH_ERR_INVALID_FORMAT;
2064 if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, NULL)) {
2065 ret = SSH_ERR_LIBCRYPTO_ERROR;
2068 rsa_n = rsa_e = NULL; /* transferred */
2069 if ((ret = check_rsa_length(key->rsa)) != 0)
2072 RSA_print_fp(stderr, key->rsa, 8);
2077 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2078 ret = SSH_ERR_INVALID_FORMAT;
2083 if ((key = sshkey_new(type)) == NULL) {
2084 ret = SSH_ERR_ALLOC_FAIL;
2087 if (sshbuf_get_bignum2(b, &dsa_p) != 0 ||
2088 sshbuf_get_bignum2(b, &dsa_q) != 0 ||
2089 sshbuf_get_bignum2(b, &dsa_g) != 0 ||
2090 sshbuf_get_bignum2(b, &dsa_pub_key) != 0) {
2091 ret = SSH_ERR_INVALID_FORMAT;
2094 if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) {
2095 ret = SSH_ERR_LIBCRYPTO_ERROR;
2098 dsa_p = dsa_q = dsa_g = NULL; /* transferred */
2099 if (!DSA_set0_key(key->dsa, dsa_pub_key, NULL)) {
2100 ret = SSH_ERR_LIBCRYPTO_ERROR;
2103 dsa_pub_key = NULL; /* transferred */
2105 DSA_print_fp(stderr, key->dsa, 8);
2108 case KEY_ECDSA_CERT:
2110 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2111 ret = SSH_ERR_INVALID_FORMAT;
2115 # ifdef OPENSSL_HAS_ECC
2117 if ((key = sshkey_new(type)) == NULL) {
2118 ret = SSH_ERR_ALLOC_FAIL;
2121 key->ecdsa_nid = sshkey_ecdsa_nid_from_name(ktype);
2122 if (sshbuf_get_cstring(b, &curve, NULL) != 0) {
2123 ret = SSH_ERR_INVALID_FORMAT;
2126 if (key->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
2127 ret = SSH_ERR_EC_CURVE_MISMATCH;
2130 EC_KEY_free(key->ecdsa);
2131 if ((key->ecdsa = EC_KEY_new_by_curve_name(key->ecdsa_nid))
2133 ret = SSH_ERR_EC_CURVE_INVALID;
2136 if ((q = EC_POINT_new(EC_KEY_get0_group(key->ecdsa))) == NULL) {
2137 ret = SSH_ERR_ALLOC_FAIL;
2140 if (sshbuf_get_ec(b, q, EC_KEY_get0_group(key->ecdsa)) != 0) {
2141 ret = SSH_ERR_INVALID_FORMAT;
2144 if (sshkey_ec_validate_public(EC_KEY_get0_group(key->ecdsa),
2146 ret = SSH_ERR_KEY_INVALID_EC_VALUE;
2149 if (EC_KEY_set_public_key(key->ecdsa, q) != 1) {
2150 /* XXX assume it is a allocation error */
2151 ret = SSH_ERR_ALLOC_FAIL;
2155 sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q);
2158 # endif /* OPENSSL_HAS_ECC */
2159 #endif /* WITH_OPENSSL */
2160 case KEY_ED25519_CERT:
2162 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2163 ret = SSH_ERR_INVALID_FORMAT;
2168 if ((ret = sshbuf_get_string(b, &pk, &len)) != 0)
2170 if (len != ED25519_PK_SZ) {
2171 ret = SSH_ERR_INVALID_FORMAT;
2174 if ((key = sshkey_new(type)) == NULL) {
2175 ret = SSH_ERR_ALLOC_FAIL;
2178 key->ed25519_pk = pk;
2184 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2185 ret = SSH_ERR_INVALID_FORMAT;
2190 if ((ret = sshbuf_get_cstring(b, &xmss_name, NULL)) != 0)
2192 if ((key = sshkey_new(type)) == NULL) {
2193 ret = SSH_ERR_ALLOC_FAIL;
2196 if ((ret = sshkey_xmss_init(key, xmss_name)) != 0)
2198 if ((ret = sshbuf_get_string(b, &pk, &len)) != 0)
2200 if (len == 0 || len != sshkey_xmss_pklen(key)) {
2201 ret = SSH_ERR_INVALID_FORMAT;
2206 if (type != KEY_XMSS_CERT &&
2207 (ret = sshkey_xmss_deserialize_pk_info(key, b)) != 0)
2210 #endif /* WITH_XMSS */
2213 ret = SSH_ERR_KEY_TYPE_UNKNOWN;
2217 /* Parse certificate potion */
2218 if (sshkey_is_cert(key) && (ret = cert_parse(b, key, copy)) != 0)
2221 if (key != NULL && sshbuf_len(b) != 0) {
2222 ret = SSH_ERR_INVALID_FORMAT;
2237 #if defined(WITH_OPENSSL)
2238 BN_clear_free(rsa_n);
2239 BN_clear_free(rsa_e);
2240 BN_clear_free(dsa_p);
2241 BN_clear_free(dsa_q);
2242 BN_clear_free(dsa_g);
2243 BN_clear_free(dsa_pub_key);
2244 # if defined(OPENSSL_HAS_ECC)
2246 # endif /* OPENSSL_HAS_ECC */
2247 #endif /* WITH_OPENSSL */
2252 sshkey_from_blob(const u_char *blob, size_t blen, struct sshkey **keyp)
2257 if ((b = sshbuf_from(blob, blen)) == NULL)
2258 return SSH_ERR_ALLOC_FAIL;
2259 r = sshkey_from_blob_internal(b, keyp, 1);
2265 sshkey_fromb(struct sshbuf *b, struct sshkey **keyp)
2267 return sshkey_from_blob_internal(b, keyp, 1);
2271 sshkey_froms(struct sshbuf *buf, struct sshkey **keyp)
2276 if ((r = sshbuf_froms(buf, &b)) != 0)
2278 r = sshkey_from_blob_internal(b, keyp, 1);
2284 get_sigtype(const u_char *sig, size_t siglen, char **sigtypep)
2287 struct sshbuf *b = NULL;
2288 char *sigtype = NULL;
2290 if (sigtypep != NULL)
2292 if ((b = sshbuf_from(sig, siglen)) == NULL)
2293 return SSH_ERR_ALLOC_FAIL;
2294 if ((r = sshbuf_get_cstring(b, &sigtype, NULL)) != 0)
2297 if (sigtypep != NULL) {
2298 *sigtypep = sigtype;
2310 * Checks whether a certificate's signature type is allowed.
2311 * Returns 0 (success) if the certificate signature type appears in the
2312 * "allowed" pattern-list, or the key is not a certificate to begin with.
2313 * Otherwise returns a ssherr.h code.
2316 sshkey_check_cert_sigtype(const struct sshkey *key, const char *allowed)
2318 if (key == NULL || allowed == NULL)
2319 return SSH_ERR_INVALID_ARGUMENT;
2320 if (!sshkey_type_is_cert(key->type))
2322 if (key->cert == NULL || key->cert->signature_type == NULL)
2323 return SSH_ERR_INVALID_ARGUMENT;
2324 if (match_pattern_list(key->cert->signature_type, allowed, 0) != 1)
2325 return SSH_ERR_SIGN_ALG_UNSUPPORTED;
2330 * Returns the expected signature algorithm for a given public key algorithm.
2333 sshkey_sigalg_by_name(const char *name)
2335 const struct keytype *kt;
2337 for (kt = keytypes; kt->type != -1; kt++) {
2338 if (strcmp(kt->name, name) != 0)
2340 if (kt->sigalg != NULL)
2344 return sshkey_ssh_name_from_type_nid(
2345 sshkey_type_plain(kt->type), kt->nid);
2351 * Verifies that the signature algorithm appearing inside the signature blob
2352 * matches that which was requested.
2355 sshkey_check_sigtype(const u_char *sig, size_t siglen,
2356 const char *requested_alg)
2358 const char *expected_alg;
2359 char *sigtype = NULL;
2362 if (requested_alg == NULL)
2364 if ((expected_alg = sshkey_sigalg_by_name(requested_alg)) == NULL)
2365 return SSH_ERR_INVALID_ARGUMENT;
2366 if ((r = get_sigtype(sig, siglen, &sigtype)) != 0)
2368 r = strcmp(expected_alg, sigtype) == 0;
2370 return r ? 0 : SSH_ERR_SIGN_ALG_UNSUPPORTED;
2374 sshkey_sign(const struct sshkey *key,
2375 u_char **sigp, size_t *lenp,
2376 const u_char *data, size_t datalen, const char *alg, u_int compat)
2382 if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2383 return SSH_ERR_INVALID_ARGUMENT;
2384 switch (key->type) {
2388 return ssh_dss_sign(key, sigp, lenp, data, datalen, compat);
2389 # ifdef OPENSSL_HAS_ECC
2390 case KEY_ECDSA_CERT:
2392 return ssh_ecdsa_sign(key, sigp, lenp, data, datalen, compat);
2393 # endif /* OPENSSL_HAS_ECC */
2396 return ssh_rsa_sign(key, sigp, lenp, data, datalen, alg);
2397 #endif /* WITH_OPENSSL */
2399 case KEY_ED25519_CERT:
2400 return ssh_ed25519_sign(key, sigp, lenp, data, datalen, compat);
2404 return ssh_xmss_sign(key, sigp, lenp, data, datalen, compat);
2405 #endif /* WITH_XMSS */
2407 return SSH_ERR_KEY_TYPE_UNKNOWN;
2412 * ssh_key_verify returns 0 for a correct signature and < 0 on error.
2413 * If "alg" specified, then the signature must use that algorithm.
2416 sshkey_verify(const struct sshkey *key,
2417 const u_char *sig, size_t siglen,
2418 const u_char *data, size_t dlen, const char *alg, u_int compat)
2420 if (siglen == 0 || dlen > SSH_KEY_MAX_SIGN_DATA_SIZE)
2421 return SSH_ERR_INVALID_ARGUMENT;
2422 switch (key->type) {
2426 return ssh_dss_verify(key, sig, siglen, data, dlen, compat);
2427 # ifdef OPENSSL_HAS_ECC
2428 case KEY_ECDSA_CERT:
2430 return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat);
2431 # endif /* OPENSSL_HAS_ECC */
2434 return ssh_rsa_verify(key, sig, siglen, data, dlen, alg);
2435 #endif /* WITH_OPENSSL */
2437 case KEY_ED25519_CERT:
2438 return ssh_ed25519_verify(key, sig, siglen, data, dlen, compat);
2442 return ssh_xmss_verify(key, sig, siglen, data, dlen, compat);
2443 #endif /* WITH_XMSS */
2445 return SSH_ERR_KEY_TYPE_UNKNOWN;
2449 /* Convert a plain key to their _CERT equivalent */
2451 sshkey_to_certified(struct sshkey *k)
2458 newtype = KEY_RSA_CERT;
2461 newtype = KEY_DSA_CERT;
2464 newtype = KEY_ECDSA_CERT;
2466 #endif /* WITH_OPENSSL */
2468 newtype = KEY_ED25519_CERT;
2472 newtype = KEY_XMSS_CERT;
2474 #endif /* WITH_XMSS */
2476 return SSH_ERR_INVALID_ARGUMENT;
2478 if ((k->cert = cert_new()) == NULL)
2479 return SSH_ERR_ALLOC_FAIL;
2484 /* Convert a certificate to its raw key equivalent */
2486 sshkey_drop_cert(struct sshkey *k)
2488 if (!sshkey_type_is_cert(k->type))
2489 return SSH_ERR_KEY_TYPE_UNKNOWN;
2492 k->type = sshkey_type_plain(k->type);
2496 /* Sign a certified key, (re-)generating the signed certblob. */
2498 sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
2499 sshkey_certify_signer *signer, void *signer_ctx)
2501 struct sshbuf *principals = NULL;
2502 u_char *ca_blob = NULL, *sig_blob = NULL, nonce[32];
2503 size_t i, ca_len, sig_len;
2504 int ret = SSH_ERR_INTERNAL_ERROR;
2505 struct sshbuf *cert = NULL;
2506 char *sigtype = NULL;
2508 const BIGNUM *rsa_n, *rsa_e, *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key;
2509 #endif /* WITH_OPENSSL */
2511 if (k == NULL || k->cert == NULL ||
2512 k->cert->certblob == NULL || ca == NULL)
2513 return SSH_ERR_INVALID_ARGUMENT;
2514 if (!sshkey_is_cert(k))
2515 return SSH_ERR_KEY_TYPE_UNKNOWN;
2516 if (!sshkey_type_is_valid_ca(ca->type))
2517 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2520 * If no alg specified as argument but a signature_type was set,
2521 * then prefer that. If both were specified, then they must match.
2524 alg = k->cert->signature_type;
2525 else if (k->cert->signature_type != NULL &&
2526 strcmp(alg, k->cert->signature_type) != 0)
2527 return SSH_ERR_INVALID_ARGUMENT;
2529 if ((ret = sshkey_to_blob(ca, &ca_blob, &ca_len)) != 0)
2530 return SSH_ERR_KEY_CERT_INVALID_SIGN_KEY;
2532 cert = k->cert->certblob; /* for readability */
2534 if ((ret = sshbuf_put_cstring(cert, sshkey_ssh_name(k))) != 0)
2537 /* -v01 certs put nonce first */
2538 arc4random_buf(&nonce, sizeof(nonce));
2539 if ((ret = sshbuf_put_string(cert, nonce, sizeof(nonce))) != 0)
2542 /* XXX this substantially duplicates to_blob(); refactor */
2546 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
2547 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
2548 if ((ret = sshbuf_put_bignum2(cert, dsa_p)) != 0 ||
2549 (ret = sshbuf_put_bignum2(cert, dsa_q)) != 0 ||
2550 (ret = sshbuf_put_bignum2(cert, dsa_g)) != 0 ||
2551 (ret = sshbuf_put_bignum2(cert, dsa_pub_key)) != 0)
2554 # ifdef OPENSSL_HAS_ECC
2555 case KEY_ECDSA_CERT:
2556 if ((ret = sshbuf_put_cstring(cert,
2557 sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 ||
2558 (ret = sshbuf_put_ec(cert,
2559 EC_KEY_get0_public_key(k->ecdsa),
2560 EC_KEY_get0_group(k->ecdsa))) != 0)
2563 # endif /* OPENSSL_HAS_ECC */
2565 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
2566 if ((ret = sshbuf_put_bignum2(cert, rsa_e)) != 0 ||
2567 (ret = sshbuf_put_bignum2(cert, rsa_n)) != 0)
2570 #endif /* WITH_OPENSSL */
2571 case KEY_ED25519_CERT:
2572 if ((ret = sshbuf_put_string(cert,
2573 k->ed25519_pk, ED25519_PK_SZ)) != 0)
2578 if (k->xmss_name == NULL) {
2579 ret = SSH_ERR_INVALID_ARGUMENT;
2582 if ((ret = sshbuf_put_cstring(cert, k->xmss_name)) ||
2583 (ret = sshbuf_put_string(cert,
2584 k->xmss_pk, sshkey_xmss_pklen(k))) != 0)
2587 #endif /* WITH_XMSS */
2589 ret = SSH_ERR_INVALID_ARGUMENT;
2593 if ((ret = sshbuf_put_u64(cert, k->cert->serial)) != 0 ||
2594 (ret = sshbuf_put_u32(cert, k->cert->type)) != 0 ||
2595 (ret = sshbuf_put_cstring(cert, k->cert->key_id)) != 0)
2598 if ((principals = sshbuf_new()) == NULL) {
2599 ret = SSH_ERR_ALLOC_FAIL;
2602 for (i = 0; i < k->cert->nprincipals; i++) {
2603 if ((ret = sshbuf_put_cstring(principals,
2604 k->cert->principals[i])) != 0)
2607 if ((ret = sshbuf_put_stringb(cert, principals)) != 0 ||
2608 (ret = sshbuf_put_u64(cert, k->cert->valid_after)) != 0 ||
2609 (ret = sshbuf_put_u64(cert, k->cert->valid_before)) != 0 ||
2610 (ret = sshbuf_put_stringb(cert, k->cert->critical)) != 0 ||
2611 (ret = sshbuf_put_stringb(cert, k->cert->extensions)) != 0 ||
2612 (ret = sshbuf_put_string(cert, NULL, 0)) != 0 || /* Reserved */
2613 (ret = sshbuf_put_string(cert, ca_blob, ca_len)) != 0)
2616 /* Sign the whole mess */
2617 if ((ret = signer(ca, &sig_blob, &sig_len, sshbuf_ptr(cert),
2618 sshbuf_len(cert), alg, 0, signer_ctx)) != 0)
2620 /* Check and update signature_type against what was actually used */
2621 if ((ret = get_sigtype(sig_blob, sig_len, &sigtype)) != 0)
2623 if (alg != NULL && strcmp(alg, sigtype) != 0) {
2624 ret = SSH_ERR_SIGN_ALG_UNSUPPORTED;
2627 if (k->cert->signature_type == NULL) {
2628 k->cert->signature_type = sigtype;
2631 /* Append signature and we are done */
2632 if ((ret = sshbuf_put_string(cert, sig_blob, sig_len)) != 0)
2641 sshbuf_free(principals);
2646 default_key_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
2647 const u_char *data, size_t datalen,
2648 const char *alg, u_int compat, void *ctx)
2651 return SSH_ERR_INVALID_ARGUMENT;
2652 return sshkey_sign(key, sigp, lenp, data, datalen, alg, compat);
2656 sshkey_certify(struct sshkey *k, struct sshkey *ca, const char *alg)
2658 return sshkey_certify_custom(k, ca, alg, default_key_sign, NULL);
2662 sshkey_cert_check_authority(const struct sshkey *k,
2663 int want_host, int require_principal,
2664 const char *name, const char **reason)
2666 u_int i, principal_matches;
2667 time_t now = time(NULL);
2673 if (k->cert->type != SSH2_CERT_TYPE_HOST) {
2674 *reason = "Certificate invalid: not a host certificate";
2675 return SSH_ERR_KEY_CERT_INVALID;
2678 if (k->cert->type != SSH2_CERT_TYPE_USER) {
2679 *reason = "Certificate invalid: not a user certificate";
2680 return SSH_ERR_KEY_CERT_INVALID;
2684 /* yikes - system clock before epoch! */
2685 *reason = "Certificate invalid: not yet valid";
2686 return SSH_ERR_KEY_CERT_INVALID;
2688 if ((u_int64_t)now < k->cert->valid_after) {
2689 *reason = "Certificate invalid: not yet valid";
2690 return SSH_ERR_KEY_CERT_INVALID;
2692 if ((u_int64_t)now >= k->cert->valid_before) {
2693 *reason = "Certificate invalid: expired";
2694 return SSH_ERR_KEY_CERT_INVALID;
2696 if (k->cert->nprincipals == 0) {
2697 if (require_principal) {
2698 *reason = "Certificate lacks principal list";
2699 return SSH_ERR_KEY_CERT_INVALID;
2701 } else if (name != NULL) {
2702 principal_matches = 0;
2703 for (i = 0; i < k->cert->nprincipals; i++) {
2704 if (strcmp(name, k->cert->principals[i]) == 0) {
2705 principal_matches = 1;
2709 if (!principal_matches) {
2710 *reason = "Certificate invalid: name is not a listed "
2712 return SSH_ERR_KEY_CERT_INVALID;
2719 sshkey_format_cert_validity(const struct sshkey_cert *cert, char *s, size_t l)
2721 char from[32], to[32], ret[64];
2726 if (cert->valid_after == 0 &&
2727 cert->valid_before == 0xffffffffffffffffULL)
2728 return strlcpy(s, "forever", l);
2730 if (cert->valid_after != 0) {
2731 /* XXX revisit INT_MAX in 2038 :) */
2732 tt = cert->valid_after > INT_MAX ?
2733 INT_MAX : cert->valid_after;
2734 tm = localtime(&tt);
2735 strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm);
2737 if (cert->valid_before != 0xffffffffffffffffULL) {
2738 /* XXX revisit INT_MAX in 2038 :) */
2739 tt = cert->valid_before > INT_MAX ?
2740 INT_MAX : cert->valid_before;
2741 tm = localtime(&tt);
2742 strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm);
2745 if (cert->valid_after == 0)
2746 snprintf(ret, sizeof(ret), "before %s", to);
2747 else if (cert->valid_before == 0xffffffffffffffffULL)
2748 snprintf(ret, sizeof(ret), "after %s", from);
2750 snprintf(ret, sizeof(ret), "from %s to %s", from, to);
2752 return strlcpy(s, ret, l);
2756 sshkey_private_serialize_opt(const struct sshkey *key, struct sshbuf *b,
2757 enum sshkey_serialize_rep opts)
2759 int r = SSH_ERR_INTERNAL_ERROR;
2761 const BIGNUM *rsa_n, *rsa_e, *rsa_d, *rsa_iqmp, *rsa_p, *rsa_q;
2762 const BIGNUM *dsa_p, *dsa_q, *dsa_g, *dsa_pub_key, *dsa_priv_key;
2763 #endif /* WITH_OPENSSL */
2765 if ((r = sshbuf_put_cstring(b, sshkey_ssh_name(key))) != 0)
2767 switch (key->type) {
2770 RSA_get0_key(key->rsa, &rsa_n, &rsa_e, &rsa_d);
2771 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2772 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2773 if ((r = sshbuf_put_bignum2(b, rsa_n)) != 0 ||
2774 (r = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
2775 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2776 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2777 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2778 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2782 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2783 r = SSH_ERR_INVALID_ARGUMENT;
2786 RSA_get0_key(key->rsa, NULL, NULL, &rsa_d);
2787 RSA_get0_factors(key->rsa, &rsa_p, &rsa_q);
2788 RSA_get0_crt_params(key->rsa, NULL, NULL, &rsa_iqmp);
2789 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2790 (r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
2791 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
2792 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
2793 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
2797 DSA_get0_pqg(key->dsa, &dsa_p, &dsa_q, &dsa_g);
2798 DSA_get0_key(key->dsa, &dsa_pub_key, &dsa_priv_key);
2799 if ((r = sshbuf_put_bignum2(b, dsa_p)) != 0 ||
2800 (r = sshbuf_put_bignum2(b, dsa_q)) != 0 ||
2801 (r = sshbuf_put_bignum2(b, dsa_g)) != 0 ||
2802 (r = sshbuf_put_bignum2(b, dsa_pub_key)) != 0 ||
2803 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2807 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2808 r = SSH_ERR_INVALID_ARGUMENT;
2811 DSA_get0_key(key->dsa, NULL, &dsa_priv_key);
2812 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2813 (r = sshbuf_put_bignum2(b, dsa_priv_key)) != 0)
2816 # ifdef OPENSSL_HAS_ECC
2818 if ((r = sshbuf_put_cstring(b,
2819 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
2820 (r = sshbuf_put_eckey(b, key->ecdsa)) != 0 ||
2821 (r = sshbuf_put_bignum2(b,
2822 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2825 case KEY_ECDSA_CERT:
2826 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2827 r = SSH_ERR_INVALID_ARGUMENT;
2830 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2831 (r = sshbuf_put_bignum2(b,
2832 EC_KEY_get0_private_key(key->ecdsa))) != 0)
2835 # endif /* OPENSSL_HAS_ECC */
2836 #endif /* WITH_OPENSSL */
2838 if ((r = sshbuf_put_string(b, key->ed25519_pk,
2839 ED25519_PK_SZ)) != 0 ||
2840 (r = sshbuf_put_string(b, key->ed25519_sk,
2841 ED25519_SK_SZ)) != 0)
2844 case KEY_ED25519_CERT:
2845 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
2846 r = SSH_ERR_INVALID_ARGUMENT;
2849 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2850 (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)
2858 if (key->xmss_name == NULL) {
2859 r = SSH_ERR_INVALID_ARGUMENT;
2862 if ((r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2863 (r = sshbuf_put_string(b, key->xmss_pk,
2864 sshkey_xmss_pklen(key))) != 0 ||
2865 (r = sshbuf_put_string(b, key->xmss_sk,
2866 sshkey_xmss_sklen(key))) != 0 ||
2867 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2871 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0 ||
2872 key->xmss_name == NULL) {
2873 r = SSH_ERR_INVALID_ARGUMENT;
2876 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
2877 (r = sshbuf_put_cstring(b, key->xmss_name)) != 0 ||
2878 (r = sshbuf_put_string(b, key->xmss_pk,
2879 sshkey_xmss_pklen(key))) != 0 ||
2880 (r = sshbuf_put_string(b, key->xmss_sk,
2881 sshkey_xmss_sklen(key))) != 0 ||
2882 (r = sshkey_xmss_serialize_state_opt(key, b, opts)) != 0)
2885 #endif /* WITH_XMSS */
2887 r = SSH_ERR_INVALID_ARGUMENT;
2897 sshkey_private_serialize(const struct sshkey *key, struct sshbuf *b)
2899 return sshkey_private_serialize_opt(key, b,
2900 SSHKEY_SERIALIZE_DEFAULT);
2904 sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
2906 char *tname = NULL, *curve = NULL, *xmss_name = NULL;
2907 struct sshkey *k = NULL;
2908 size_t pklen = 0, sklen = 0;
2909 int type, r = SSH_ERR_INTERNAL_ERROR;
2910 u_char *ed25519_pk = NULL, *ed25519_sk = NULL;
2911 u_char *xmss_pk = NULL, *xmss_sk = NULL;
2913 BIGNUM *exponent = NULL;
2914 BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
2915 BIGNUM *rsa_iqmp = NULL, *rsa_p = NULL, *rsa_q = NULL;
2916 BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
2917 BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
2918 #endif /* WITH_OPENSSL */
2922 if ((r = sshbuf_get_cstring(buf, &tname, NULL)) != 0)
2924 type = sshkey_type_from_name(tname);
2928 if ((k = sshkey_new(type)) == NULL) {
2929 r = SSH_ERR_ALLOC_FAIL;
2932 if ((r = sshbuf_get_bignum2(buf, &dsa_p)) != 0 ||
2933 (r = sshbuf_get_bignum2(buf, &dsa_q)) != 0 ||
2934 (r = sshbuf_get_bignum2(buf, &dsa_g)) != 0 ||
2935 (r = sshbuf_get_bignum2(buf, &dsa_pub_key)) != 0 ||
2936 (r = sshbuf_get_bignum2(buf, &dsa_priv_key)) != 0)
2938 if (!DSA_set0_pqg(k->dsa, dsa_p, dsa_q, dsa_g)) {
2939 r = SSH_ERR_LIBCRYPTO_ERROR;
2942 dsa_p = dsa_q = dsa_g = NULL; /* transferred */
2943 if (!DSA_set0_key(k->dsa, dsa_pub_key, dsa_priv_key)) {
2944 r = SSH_ERR_LIBCRYPTO_ERROR;
2947 dsa_pub_key = dsa_priv_key = NULL; /* transferred */
2950 if ((r = sshkey_froms(buf, &k)) != 0 ||
2951 (r = sshbuf_get_bignum2(buf, &dsa_priv_key)) != 0)
2953 if (!DSA_set0_key(k->dsa, NULL, dsa_priv_key)) {
2954 r = SSH_ERR_LIBCRYPTO_ERROR;
2957 dsa_priv_key = NULL; /* transferred */
2959 # ifdef OPENSSL_HAS_ECC
2961 if ((k = sshkey_new(type)) == NULL) {
2962 r = SSH_ERR_ALLOC_FAIL;
2965 if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) {
2966 r = SSH_ERR_INVALID_ARGUMENT;
2969 if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0)
2971 if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
2972 r = SSH_ERR_EC_CURVE_MISMATCH;
2975 k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
2976 if (k->ecdsa == NULL) {
2977 r = SSH_ERR_LIBCRYPTO_ERROR;
2980 if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 ||
2981 (r = sshbuf_get_bignum2(buf, &exponent)))
2983 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
2984 r = SSH_ERR_LIBCRYPTO_ERROR;
2987 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
2988 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
2989 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
2992 case KEY_ECDSA_CERT:
2993 if ((r = sshkey_froms(buf, &k)) != 0 ||
2994 (r = sshbuf_get_bignum2(buf, &exponent)) != 0)
2996 if (EC_KEY_set_private_key(k->ecdsa, exponent) != 1) {
2997 r = SSH_ERR_LIBCRYPTO_ERROR;
3000 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
3001 EC_KEY_get0_public_key(k->ecdsa))) != 0 ||
3002 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
3005 # endif /* OPENSSL_HAS_ECC */
3007 if ((k = sshkey_new(type)) == NULL) {
3008 r = SSH_ERR_ALLOC_FAIL;
3011 if ((r = sshbuf_get_bignum2(buf, &rsa_n)) != 0 ||
3012 (r = sshbuf_get_bignum2(buf, &rsa_e)) != 0 ||
3013 (r = sshbuf_get_bignum2(buf, &rsa_d)) != 0 ||
3014 (r = sshbuf_get_bignum2(buf, &rsa_iqmp)) != 0 ||
3015 (r = sshbuf_get_bignum2(buf, &rsa_p)) != 0 ||
3016 (r = sshbuf_get_bignum2(buf, &rsa_q)) != 0)
3018 if (!RSA_set0_key(k->rsa, rsa_n, rsa_e, rsa_d)) {
3019 r = SSH_ERR_LIBCRYPTO_ERROR;
3022 rsa_n = rsa_e = rsa_d = NULL; /* transferred */
3023 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3024 r = SSH_ERR_LIBCRYPTO_ERROR;
3027 rsa_p = rsa_q = NULL; /* transferred */
3028 if ((r = check_rsa_length(k->rsa)) != 0)
3030 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3034 if ((r = sshkey_froms(buf, &k)) != 0 ||
3035 (r = sshbuf_get_bignum2(buf, &rsa_d)) != 0 ||
3036 (r = sshbuf_get_bignum2(buf, &rsa_iqmp)) != 0 ||
3037 (r = sshbuf_get_bignum2(buf, &rsa_p)) != 0 ||
3038 (r = sshbuf_get_bignum2(buf, &rsa_q)) != 0)
3040 if (!RSA_set0_key(k->rsa, NULL, NULL, rsa_d)) {
3041 r = SSH_ERR_LIBCRYPTO_ERROR;
3044 rsa_d = NULL; /* transferred */
3045 if (!RSA_set0_factors(k->rsa, rsa_p, rsa_q)) {
3046 r = SSH_ERR_LIBCRYPTO_ERROR;
3049 rsa_p = rsa_q = NULL; /* transferred */
3050 if ((r = check_rsa_length(k->rsa)) != 0)
3052 if ((r = ssh_rsa_complete_crt_parameters(k, rsa_iqmp)) != 0)
3055 #endif /* WITH_OPENSSL */
3057 if ((k = sshkey_new(type)) == NULL) {
3058 r = SSH_ERR_ALLOC_FAIL;
3061 if ((r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3062 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3064 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3065 r = SSH_ERR_INVALID_FORMAT;
3068 k->ed25519_pk = ed25519_pk;
3069 k->ed25519_sk = ed25519_sk;
3070 ed25519_pk = ed25519_sk = NULL;
3072 case KEY_ED25519_CERT:
3073 if ((r = sshkey_froms(buf, &k)) != 0 ||
3074 (r = sshbuf_get_string(buf, &ed25519_pk, &pklen)) != 0 ||
3075 (r = sshbuf_get_string(buf, &ed25519_sk, &sklen)) != 0)
3077 if (pklen != ED25519_PK_SZ || sklen != ED25519_SK_SZ) {
3078 r = SSH_ERR_INVALID_FORMAT;
3081 k->ed25519_pk = ed25519_pk;
3082 k->ed25519_sk = ed25519_sk;
3083 ed25519_pk = ed25519_sk = NULL;
3087 if ((k = sshkey_new(type)) == NULL) {
3088 r = SSH_ERR_ALLOC_FAIL;
3091 if ((r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3092 (r = sshkey_xmss_init(k, xmss_name)) != 0 ||
3093 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3094 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3096 if (pklen != sshkey_xmss_pklen(k) ||
3097 sklen != sshkey_xmss_sklen(k)) {
3098 r = SSH_ERR_INVALID_FORMAT;
3101 k->xmss_pk = xmss_pk;
3102 k->xmss_sk = xmss_sk;
3103 xmss_pk = xmss_sk = NULL;
3104 /* optional internal state */
3105 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3109 if ((r = sshkey_froms(buf, &k)) != 0 ||
3110 (r = sshbuf_get_cstring(buf, &xmss_name, NULL)) != 0 ||
3111 (r = sshbuf_get_string(buf, &xmss_pk, &pklen)) != 0 ||
3112 (r = sshbuf_get_string(buf, &xmss_sk, &sklen)) != 0)
3114 if (strcmp(xmss_name, k->xmss_name)) {
3115 r = SSH_ERR_INVALID_FORMAT;
3118 if (pklen != sshkey_xmss_pklen(k) ||
3119 sklen != sshkey_xmss_sklen(k)) {
3120 r = SSH_ERR_INVALID_FORMAT;
3123 k->xmss_pk = xmss_pk;
3124 k->xmss_sk = xmss_sk;
3125 xmss_pk = xmss_sk = NULL;
3126 /* optional internal state */
3127 if ((r = sshkey_xmss_deserialize_state_opt(k, buf)) != 0)
3130 #endif /* WITH_XMSS */
3132 r = SSH_ERR_KEY_TYPE_UNKNOWN;
3136 /* enable blinding */
3140 if (RSA_blinding_on(k->rsa, NULL) != 1) {
3141 r = SSH_ERR_LIBCRYPTO_ERROR;
3146 #endif /* WITH_OPENSSL */
3157 BN_clear_free(exponent);
3158 BN_clear_free(dsa_p);
3159 BN_clear_free(dsa_q);
3160 BN_clear_free(dsa_g);
3161 BN_clear_free(dsa_pub_key);
3162 BN_clear_free(dsa_priv_key);
3163 BN_clear_free(rsa_n);
3164 BN_clear_free(rsa_e);
3165 BN_clear_free(rsa_d);
3166 BN_clear_free(rsa_p);
3167 BN_clear_free(rsa_q);
3168 BN_clear_free(rsa_iqmp);
3169 #endif /* WITH_OPENSSL */
3171 freezero(ed25519_pk, pklen);
3172 freezero(ed25519_sk, sklen);
3174 freezero(xmss_pk, pklen);
3175 freezero(xmss_sk, sklen);
3179 #if defined(WITH_OPENSSL) && defined(OPENSSL_HAS_ECC)
3181 sshkey_ec_validate_public(const EC_GROUP *group, const EC_POINT *public)
3184 EC_POINT *nq = NULL;
3185 BIGNUM *order, *x, *y, *tmp;
3186 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3189 * NB. This assumes OpenSSL has already verified that the public
3190 * point lies on the curve. This is done by EC_POINT_oct2point()
3191 * implicitly calling EC_POINT_is_on_curve(). If this code is ever
3192 * reachable with public points not unmarshalled using
3193 * EC_POINT_oct2point then the caller will need to explicitly check.
3196 if ((bnctx = BN_CTX_new()) == NULL)
3197 return SSH_ERR_ALLOC_FAIL;
3198 BN_CTX_start(bnctx);
3201 * We shouldn't ever hit this case because bignum_get_ecpoint()
3202 * refuses to load GF2m points.
3204 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3205 NID_X9_62_prime_field)
3209 if (EC_POINT_is_at_infinity(group, public))
3212 if ((x = BN_CTX_get(bnctx)) == NULL ||
3213 (y = BN_CTX_get(bnctx)) == NULL ||
3214 (order = BN_CTX_get(bnctx)) == NULL ||
3215 (tmp = BN_CTX_get(bnctx)) == NULL) {
3216 ret = SSH_ERR_ALLOC_FAIL;
3220 /* log2(x) > log2(order)/2, log2(y) > log2(order)/2 */
3221 if (EC_GROUP_get_order(group, order, bnctx) != 1 ||
3222 EC_POINT_get_affine_coordinates_GFp(group, public,
3223 x, y, bnctx) != 1) {
3224 ret = SSH_ERR_LIBCRYPTO_ERROR;
3227 if (BN_num_bits(x) <= BN_num_bits(order) / 2 ||
3228 BN_num_bits(y) <= BN_num_bits(order) / 2)
3231 /* nQ == infinity (n == order of subgroup) */
3232 if ((nq = EC_POINT_new(group)) == NULL) {
3233 ret = SSH_ERR_ALLOC_FAIL;
3236 if (EC_POINT_mul(group, nq, NULL, public, order, bnctx) != 1) {
3237 ret = SSH_ERR_LIBCRYPTO_ERROR;
3240 if (EC_POINT_is_at_infinity(group, nq) != 1)
3243 /* x < order - 1, y < order - 1 */
3244 if (!BN_sub(tmp, order, BN_value_one())) {
3245 ret = SSH_ERR_LIBCRYPTO_ERROR;
3248 if (BN_cmp(x, tmp) >= 0 || BN_cmp(y, tmp) >= 0)
3258 sshkey_ec_validate_private(const EC_KEY *key)
3261 BIGNUM *order, *tmp;
3262 int ret = SSH_ERR_KEY_INVALID_EC_VALUE;
3264 if ((bnctx = BN_CTX_new()) == NULL)
3265 return SSH_ERR_ALLOC_FAIL;
3266 BN_CTX_start(bnctx);
3268 if ((order = BN_CTX_get(bnctx)) == NULL ||
3269 (tmp = BN_CTX_get(bnctx)) == NULL) {
3270 ret = SSH_ERR_ALLOC_FAIL;
3274 /* log2(private) > log2(order)/2 */
3275 if (EC_GROUP_get_order(EC_KEY_get0_group(key), order, bnctx) != 1) {
3276 ret = SSH_ERR_LIBCRYPTO_ERROR;
3279 if (BN_num_bits(EC_KEY_get0_private_key(key)) <=
3280 BN_num_bits(order) / 2)
3283 /* private < order - 1 */
3284 if (!BN_sub(tmp, order, BN_value_one())) {
3285 ret = SSH_ERR_LIBCRYPTO_ERROR;
3288 if (BN_cmp(EC_KEY_get0_private_key(key), tmp) >= 0)
3297 sshkey_dump_ec_point(const EC_GROUP *group, const EC_POINT *point)
3302 if (point == NULL) {
3303 fputs("point=(NULL)\n", stderr);
3306 if ((bnctx = BN_CTX_new()) == NULL) {
3307 fprintf(stderr, "%s: BN_CTX_new failed\n", __func__);
3310 BN_CTX_start(bnctx);
3311 if ((x = BN_CTX_get(bnctx)) == NULL ||
3312 (y = BN_CTX_get(bnctx)) == NULL) {
3313 fprintf(stderr, "%s: BN_CTX_get failed\n", __func__);
3316 if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
3317 NID_X9_62_prime_field) {
3318 fprintf(stderr, "%s: group is not a prime field\n", __func__);
3321 if (EC_POINT_get_affine_coordinates_GFp(group, point, x, y,
3323 fprintf(stderr, "%s: EC_POINT_get_affine_coordinates_GFp\n",
3327 fputs("x=", stderr);
3328 BN_print_fp(stderr, x);
3329 fputs("\ny=", stderr);
3330 BN_print_fp(stderr, y);
3331 fputs("\n", stderr);
3336 sshkey_dump_ec_key(const EC_KEY *key)
3338 const BIGNUM *exponent;
3340 sshkey_dump_ec_point(EC_KEY_get0_group(key),
3341 EC_KEY_get0_public_key(key));
3342 fputs("exponent=", stderr);
3343 if ((exponent = EC_KEY_get0_private_key(key)) == NULL)
3344 fputs("(NULL)", stderr);
3346 BN_print_fp(stderr, EC_KEY_get0_private_key(key));
3347 fputs("\n", stderr);
3349 #endif /* WITH_OPENSSL && OPENSSL_HAS_ECC */
3352 sshkey_private_to_blob2(const struct sshkey *prv, struct sshbuf *blob,
3353 const char *passphrase, const char *comment, const char *ciphername,
3356 u_char *cp, *key = NULL, *pubkeyblob = NULL;
3357 u_char salt[SALT_LEN];
3359 size_t i, pubkeylen, keylen, ivlen, blocksize, authlen;
3361 int r = SSH_ERR_INTERNAL_ERROR;
3362 struct sshcipher_ctx *ciphercontext = NULL;
3363 const struct sshcipher *cipher;
3364 const char *kdfname = KDFNAME;
3365 struct sshbuf *encoded = NULL, *encrypted = NULL, *kdf = NULL;
3368 rounds = DEFAULT_ROUNDS;
3369 if (passphrase == NULL || !strlen(passphrase)) {
3370 ciphername = "none";
3372 } else if (ciphername == NULL)
3373 ciphername = DEFAULT_CIPHERNAME;
3374 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3375 r = SSH_ERR_INVALID_ARGUMENT;
3379 if ((kdf = sshbuf_new()) == NULL ||
3380 (encoded = sshbuf_new()) == NULL ||
3381 (encrypted = sshbuf_new()) == NULL) {
3382 r = SSH_ERR_ALLOC_FAIL;
3385 blocksize = cipher_blocksize(cipher);
3386 keylen = cipher_keylen(cipher);
3387 ivlen = cipher_ivlen(cipher);
3388 authlen = cipher_authlen(cipher);
3389 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3390 r = SSH_ERR_ALLOC_FAIL;
3393 if (strcmp(kdfname, "bcrypt") == 0) {
3394 arc4random_buf(salt, SALT_LEN);
3395 if (bcrypt_pbkdf(passphrase, strlen(passphrase),
3396 salt, SALT_LEN, key, keylen + ivlen, rounds) < 0) {
3397 r = SSH_ERR_INVALID_ARGUMENT;
3400 if ((r = sshbuf_put_string(kdf, salt, SALT_LEN)) != 0 ||
3401 (r = sshbuf_put_u32(kdf, rounds)) != 0)
3403 } else if (strcmp(kdfname, "none") != 0) {
3404 /* Unsupported KDF type */
3405 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3408 if ((r = cipher_init(&ciphercontext, cipher, key, keylen,
3409 key + keylen, ivlen, 1)) != 0)
3412 if ((r = sshbuf_put(encoded, AUTH_MAGIC, sizeof(AUTH_MAGIC))) != 0 ||
3413 (r = sshbuf_put_cstring(encoded, ciphername)) != 0 ||
3414 (r = sshbuf_put_cstring(encoded, kdfname)) != 0 ||
3415 (r = sshbuf_put_stringb(encoded, kdf)) != 0 ||
3416 (r = sshbuf_put_u32(encoded, 1)) != 0 || /* number of keys */
3417 (r = sshkey_to_blob(prv, &pubkeyblob, &pubkeylen)) != 0 ||
3418 (r = sshbuf_put_string(encoded, pubkeyblob, pubkeylen)) != 0)
3421 /* set up the buffer that will be encrypted */
3423 /* Random check bytes */
3424 check = arc4random();
3425 if ((r = sshbuf_put_u32(encrypted, check)) != 0 ||
3426 (r = sshbuf_put_u32(encrypted, check)) != 0)
3429 /* append private key and comment*/
3430 if ((r = sshkey_private_serialize_opt(prv, encrypted,
3431 SSHKEY_SERIALIZE_FULL)) != 0 ||
3432 (r = sshbuf_put_cstring(encrypted, comment)) != 0)
3437 while (sshbuf_len(encrypted) % blocksize) {
3438 if ((r = sshbuf_put_u8(encrypted, ++i & 0xff)) != 0)
3442 /* length in destination buffer */
3443 if ((r = sshbuf_put_u32(encoded, sshbuf_len(encrypted))) != 0)
3447 if ((r = sshbuf_reserve(encoded,
3448 sshbuf_len(encrypted) + authlen, &cp)) != 0)
3450 if ((r = cipher_crypt(ciphercontext, 0, cp,
3451 sshbuf_ptr(encrypted), sshbuf_len(encrypted), 0, authlen)) != 0)
3455 if ((b64 = sshbuf_dtob64(encoded)) == NULL) {
3456 r = SSH_ERR_ALLOC_FAIL;
3461 if ((r = sshbuf_put(blob, MARK_BEGIN, MARK_BEGIN_LEN)) != 0)
3463 for (i = 0; i < strlen(b64); i++) {
3464 if ((r = sshbuf_put_u8(blob, b64[i])) != 0)
3466 /* insert line breaks */
3467 if (i % 70 == 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3470 if (i % 70 != 69 && (r = sshbuf_put_u8(blob, '\n')) != 0)
3472 if ((r = sshbuf_put(blob, MARK_END, MARK_END_LEN)) != 0)
3480 sshbuf_free(encoded);
3481 sshbuf_free(encrypted);
3482 cipher_free(ciphercontext);
3483 explicit_bzero(salt, sizeof(salt));
3485 explicit_bzero(key, keylen + ivlen);
3488 if (pubkeyblob != NULL) {
3489 explicit_bzero(pubkeyblob, pubkeylen);
3493 explicit_bzero(b64, strlen(b64));
3500 sshkey_parse_private2(struct sshbuf *blob, int type, const char *passphrase,
3501 struct sshkey **keyp, char **commentp)
3503 char *comment = NULL, *ciphername = NULL, *kdfname = NULL;
3504 const struct sshcipher *cipher = NULL;
3506 int r = SSH_ERR_INTERNAL_ERROR;
3508 size_t i, keylen = 0, ivlen = 0, authlen = 0, slen = 0;
3509 struct sshbuf *encoded = NULL, *decoded = NULL;
3510 struct sshbuf *kdf = NULL, *decrypted = NULL;
3511 struct sshcipher_ctx *ciphercontext = NULL;
3512 struct sshkey *k = NULL;
3513 u_char *key = NULL, *salt = NULL, *dp, pad, last;
3514 u_int blocksize, rounds, nkeys, encrypted_len, check1, check2;
3518 if (commentp != NULL)
3521 if ((encoded = sshbuf_new()) == NULL ||
3522 (decoded = sshbuf_new()) == NULL ||
3523 (decrypted = sshbuf_new()) == NULL) {
3524 r = SSH_ERR_ALLOC_FAIL;
3528 /* check preamble */
3529 cp = sshbuf_ptr(blob);
3530 encoded_len = sshbuf_len(blob);
3531 if (encoded_len < (MARK_BEGIN_LEN + MARK_END_LEN) ||
3532 memcmp(cp, MARK_BEGIN, MARK_BEGIN_LEN) != 0) {
3533 r = SSH_ERR_INVALID_FORMAT;
3536 cp += MARK_BEGIN_LEN;
3537 encoded_len -= MARK_BEGIN_LEN;
3539 /* Look for end marker, removing whitespace as we go */
3540 while (encoded_len > 0) {
3541 if (*cp != '\n' && *cp != '\r') {
3542 if ((r = sshbuf_put_u8(encoded, *cp)) != 0)
3549 if (encoded_len >= MARK_END_LEN &&
3550 memcmp(cp, MARK_END, MARK_END_LEN) == 0) {
3552 if ((r = sshbuf_put_u8(encoded, 0)) != 0)
3558 if (encoded_len == 0) {
3559 r = SSH_ERR_INVALID_FORMAT;
3564 if ((r = sshbuf_b64tod(decoded, (char *)sshbuf_ptr(encoded))) != 0)
3568 if (sshbuf_len(decoded) < sizeof(AUTH_MAGIC) ||
3569 memcmp(sshbuf_ptr(decoded), AUTH_MAGIC, sizeof(AUTH_MAGIC))) {
3570 r = SSH_ERR_INVALID_FORMAT;
3573 /* parse public portion of key */
3574 if ((r = sshbuf_consume(decoded, sizeof(AUTH_MAGIC))) != 0 ||
3575 (r = sshbuf_get_cstring(decoded, &ciphername, NULL)) != 0 ||
3576 (r = sshbuf_get_cstring(decoded, &kdfname, NULL)) != 0 ||
3577 (r = sshbuf_froms(decoded, &kdf)) != 0 ||
3578 (r = sshbuf_get_u32(decoded, &nkeys)) != 0 ||
3579 (r = sshbuf_skip_string(decoded)) != 0 || /* pubkey */
3580 (r = sshbuf_get_u32(decoded, &encrypted_len)) != 0)
3583 if ((cipher = cipher_by_name(ciphername)) == NULL) {
3584 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3587 if ((passphrase == NULL || strlen(passphrase) == 0) &&
3588 strcmp(ciphername, "none") != 0) {
3589 /* passphrase required */
3590 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3593 if (strcmp(kdfname, "none") != 0 && strcmp(kdfname, "bcrypt") != 0) {
3594 r = SSH_ERR_KEY_UNKNOWN_CIPHER;
3597 if (!strcmp(kdfname, "none") && strcmp(ciphername, "none") != 0) {
3598 r = SSH_ERR_INVALID_FORMAT;
3602 /* XXX only one key supported */
3603 r = SSH_ERR_INVALID_FORMAT;
3607 /* check size of encrypted key blob */
3608 blocksize = cipher_blocksize(cipher);
3609 if (encrypted_len < blocksize || (encrypted_len % blocksize) != 0) {
3610 r = SSH_ERR_INVALID_FORMAT;
3615 keylen = cipher_keylen(cipher);
3616 ivlen = cipher_ivlen(cipher);
3617 authlen = cipher_authlen(cipher);
3618 if ((key = calloc(1, keylen + ivlen)) == NULL) {
3619 r = SSH_ERR_ALLOC_FAIL;
3622 if (strcmp(kdfname, "bcrypt") == 0) {
3623 if ((r = sshbuf_get_string(kdf, &salt, &slen)) != 0 ||
3624 (r = sshbuf_get_u32(kdf, &rounds)) != 0)
3626 if (bcrypt_pbkdf(passphrase, strlen(passphrase), salt, slen,
3627 key, keylen + ivlen, rounds) < 0) {
3628 r = SSH_ERR_INVALID_FORMAT;
3633 /* check that an appropriate amount of auth data is present */
3634 if (sshbuf_len(decoded) < encrypted_len + authlen) {
3635 r = SSH_ERR_INVALID_FORMAT;
3639 /* decrypt private portion of key */
3640 if ((r = sshbuf_reserve(decrypted, encrypted_len, &dp)) != 0 ||
3641 (r = cipher_init(&ciphercontext, cipher, key, keylen,
3642 key + keylen, ivlen, 0)) != 0)
3644 if ((r = cipher_crypt(ciphercontext, 0, dp, sshbuf_ptr(decoded),
3645 encrypted_len, 0, authlen)) != 0) {
3646 /* an integrity error here indicates an incorrect passphrase */
3647 if (r == SSH_ERR_MAC_INVALID)
3648 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3651 if ((r = sshbuf_consume(decoded, encrypted_len + authlen)) != 0)
3653 /* there should be no trailing data */
3654 if (sshbuf_len(decoded) != 0) {
3655 r = SSH_ERR_INVALID_FORMAT;
3659 /* check check bytes */
3660 if ((r = sshbuf_get_u32(decrypted, &check1)) != 0 ||
3661 (r = sshbuf_get_u32(decrypted, &check2)) != 0)
3663 if (check1 != check2) {
3664 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3668 /* Load the private key and comment */
3669 if ((r = sshkey_private_deserialize(decrypted, &k)) != 0 ||
3670 (r = sshbuf_get_cstring(decrypted, &comment, NULL)) != 0)
3673 /* Check deterministic padding */
3675 while (sshbuf_len(decrypted)) {
3676 if ((r = sshbuf_get_u8(decrypted, &pad)) != 0)
3678 if (pad != (++i & 0xff)) {
3679 r = SSH_ERR_INVALID_FORMAT;
3684 /* XXX decode pubkey and check against private */
3692 if (commentp != NULL) {
3693 *commentp = comment;
3698 cipher_free(ciphercontext);
3703 explicit_bzero(salt, slen);
3707 explicit_bzero(key, keylen + ivlen);
3710 sshbuf_free(encoded);
3711 sshbuf_free(decoded);
3713 sshbuf_free(decrypted);
3720 /* convert SSH v2 key in OpenSSL PEM format */
3722 sshkey_private_pem_to_blob(struct sshkey *key, struct sshbuf *blob,
3723 const char *_passphrase, const char *comment)
3726 int blen, len = strlen(_passphrase);
3727 u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
3728 const EVP_CIPHER *cipher = (len > 0) ? EVP_aes_128_cbc() : NULL;
3732 if (len > 0 && len <= 4)
3733 return SSH_ERR_PASSPHRASE_TOO_SHORT;
3734 if ((bio = BIO_new(BIO_s_mem())) == NULL)
3735 return SSH_ERR_ALLOC_FAIL;
3737 switch (key->type) {
3739 success = PEM_write_bio_DSAPrivateKey(bio, key->dsa,
3740 cipher, passphrase, len, NULL, NULL);
3742 #ifdef OPENSSL_HAS_ECC
3744 success = PEM_write_bio_ECPrivateKey(bio, key->ecdsa,
3745 cipher, passphrase, len, NULL, NULL);
3749 success = PEM_write_bio_RSAPrivateKey(bio, key->rsa,
3750 cipher, passphrase, len, NULL, NULL);
3757 r = SSH_ERR_LIBCRYPTO_ERROR;
3760 if ((blen = BIO_get_mem_data(bio, &bptr)) <= 0) {
3761 r = SSH_ERR_INTERNAL_ERROR;
3764 if ((r = sshbuf_put(blob, bptr, blen)) != 0)
3771 #endif /* WITH_OPENSSL */
3773 /* Serialise "key" to buffer "blob" */
3775 sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
3776 const char *passphrase, const char *comment,
3777 int force_new_format, const char *new_format_cipher, int new_format_rounds)
3779 switch (key->type) {
3784 if (force_new_format) {
3785 return sshkey_private_to_blob2(key, blob, passphrase,
3786 comment, new_format_cipher, new_format_rounds);
3788 return sshkey_private_pem_to_blob(key, blob,
3789 passphrase, comment);
3790 #endif /* WITH_OPENSSL */
3794 #endif /* WITH_XMSS */
3795 return sshkey_private_to_blob2(key, blob, passphrase,
3796 comment, new_format_cipher, new_format_rounds);
3798 return SSH_ERR_KEY_TYPE_UNKNOWN;
3805 translate_libcrypto_error(unsigned long pem_err)
3807 int pem_reason = ERR_GET_REASON(pem_err);
3809 switch (ERR_GET_LIB(pem_err)) {
3811 switch (pem_reason) {
3812 case PEM_R_BAD_PASSWORD_READ:
3813 case PEM_R_PROBLEMS_GETTING_PASSWORD:
3814 case PEM_R_BAD_DECRYPT:
3815 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3817 return SSH_ERR_INVALID_FORMAT;
3820 switch (pem_reason) {
3821 case EVP_R_BAD_DECRYPT:
3822 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3823 #ifdef EVP_R_BN_DECODE_ERROR
3824 case EVP_R_BN_DECODE_ERROR:
3826 case EVP_R_DECODE_ERROR:
3827 #ifdef EVP_R_PRIVATE_KEY_DECODE_ERROR
3828 case EVP_R_PRIVATE_KEY_DECODE_ERROR:
3830 return SSH_ERR_INVALID_FORMAT;
3832 return SSH_ERR_LIBCRYPTO_ERROR;
3835 return SSH_ERR_INVALID_FORMAT;
3837 return SSH_ERR_LIBCRYPTO_ERROR;
3841 clear_libcrypto_errors(void)
3843 while (ERR_get_error() != 0)
3848 * Translate OpenSSL error codes to determine whether
3849 * passphrase is required/incorrect.
3852 convert_libcrypto_error(void)
3855 * Some password errors are reported at the beginning
3856 * of the error queue.
3858 if (translate_libcrypto_error(ERR_peek_error()) ==
3859 SSH_ERR_KEY_WRONG_PASSPHRASE)
3860 return SSH_ERR_KEY_WRONG_PASSPHRASE;
3861 return translate_libcrypto_error(ERR_peek_last_error());
3865 pem_passphrase_cb(char *buf, int size, int rwflag, void *u)
3867 char *p = (char *)u;
3870 if (p == NULL || (len = strlen(p)) == 0)
3872 if (size < 0 || len > (size_t)size)
3874 memcpy(buf, p, len);
3879 sshkey_parse_private_pem_fileblob(struct sshbuf *blob, int type,
3880 const char *passphrase, struct sshkey **keyp)
3882 EVP_PKEY *pk = NULL;
3883 struct sshkey *prv = NULL;
3890 if ((bio = BIO_new(BIO_s_mem())) == NULL || sshbuf_len(blob) > INT_MAX)
3891 return SSH_ERR_ALLOC_FAIL;
3892 if (BIO_write(bio, sshbuf_ptr(blob), sshbuf_len(blob)) !=
3893 (int)sshbuf_len(blob)) {
3894 r = SSH_ERR_ALLOC_FAIL;
3898 clear_libcrypto_errors();
3899 if ((pk = PEM_read_bio_PrivateKey(bio, NULL, pem_passphrase_cb,
3900 (char *)passphrase)) == NULL) {
3902 * libcrypto may return various ASN.1 errors when attempting
3903 * to parse a key with an incorrect passphrase.
3904 * Treat all format errors as "incorrect passphrase" if a
3905 * passphrase was supplied.
3907 if (passphrase != NULL && *passphrase != '\0')
3908 r = SSH_ERR_KEY_WRONG_PASSPHRASE;
3910 r = convert_libcrypto_error();
3913 if (EVP_PKEY_base_id(pk) == EVP_PKEY_RSA &&
3914 (type == KEY_UNSPEC || type == KEY_RSA)) {
3915 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3916 r = SSH_ERR_ALLOC_FAIL;
3919 prv->rsa = EVP_PKEY_get1_RSA(pk);
3920 prv->type = KEY_RSA;
3922 RSA_print_fp(stderr, prv->rsa, 8);
3924 if (RSA_blinding_on(prv->rsa, NULL) != 1) {
3925 r = SSH_ERR_LIBCRYPTO_ERROR;
3928 if ((r = check_rsa_length(prv->rsa)) != 0)
3930 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_DSA &&
3931 (type == KEY_UNSPEC || type == KEY_DSA)) {
3932 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3933 r = SSH_ERR_ALLOC_FAIL;
3936 prv->dsa = EVP_PKEY_get1_DSA(pk);
3937 prv->type = KEY_DSA;
3939 DSA_print_fp(stderr, prv->dsa, 8);
3941 #ifdef OPENSSL_HAS_ECC
3942 } else if (EVP_PKEY_base_id(pk) == EVP_PKEY_EC &&
3943 (type == KEY_UNSPEC || type == KEY_ECDSA)) {
3944 if ((prv = sshkey_new(KEY_UNSPEC)) == NULL) {
3945 r = SSH_ERR_ALLOC_FAIL;
3948 prv->ecdsa = EVP_PKEY_get1_EC_KEY(pk);
3949 prv->type = KEY_ECDSA;
3950 prv->ecdsa_nid = sshkey_ecdsa_key_to_nid(prv->ecdsa);
3951 if (prv->ecdsa_nid == -1 ||
3952 sshkey_curve_nid_to_name(prv->ecdsa_nid) == NULL ||
3953 sshkey_ec_validate_public(EC_KEY_get0_group(prv->ecdsa),
3954 EC_KEY_get0_public_key(prv->ecdsa)) != 0 ||
3955 sshkey_ec_validate_private(prv->ecdsa) != 0) {
3956 r = SSH_ERR_INVALID_FORMAT;
3960 if (prv != NULL && prv->ecdsa != NULL)
3961 sshkey_dump_ec_key(prv->ecdsa);
3963 #endif /* OPENSSL_HAS_ECC */
3965 r = SSH_ERR_INVALID_FORMAT;
3979 #endif /* WITH_OPENSSL */
3982 sshkey_parse_private_fileblob_type(struct sshbuf *blob, int type,
3983 const char *passphrase, struct sshkey **keyp, char **commentp)
3985 int r = SSH_ERR_INTERNAL_ERROR;
3989 if (commentp != NULL)
3997 return sshkey_parse_private_pem_fileblob(blob, type,
3999 #endif /* WITH_OPENSSL */
4003 #endif /* WITH_XMSS */
4004 return sshkey_parse_private2(blob, type, passphrase,
4007 r = sshkey_parse_private2(blob, type, passphrase, keyp,
4009 /* Do not fallback to PEM parser if only passphrase is wrong. */
4010 if (r == 0 || r == SSH_ERR_KEY_WRONG_PASSPHRASE)
4013 return sshkey_parse_private_pem_fileblob(blob, type,
4016 return SSH_ERR_INVALID_FORMAT;
4017 #endif /* WITH_OPENSSL */
4019 return SSH_ERR_KEY_TYPE_UNKNOWN;
4024 sshkey_parse_private_fileblob(struct sshbuf *buffer, const char *passphrase,
4025 struct sshkey **keyp, char **commentp)
4029 if (commentp != NULL)
4032 return sshkey_parse_private_fileblob_type(buffer, KEY_UNSPEC,
4033 passphrase, keyp, commentp);
4038 * serialize the key with the current state and forward the state
4042 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4043 u_int32_t maxsign, sshkey_printfn *pr)
4048 sshkey_type_plain(k->type) != KEY_XMSS)
4049 return sshkey_private_serialize_opt(k, b,
4050 SSHKEY_SERIALIZE_DEFAULT);
4051 if ((r = sshkey_xmss_get_state(k, pr)) != 0 ||
4052 (r = sshkey_private_serialize_opt(k, b,
4053 SSHKEY_SERIALIZE_STATE)) != 0 ||
4054 (r = sshkey_xmss_forward_state(k, maxsign)) != 0)
4058 if ((rupdate = sshkey_xmss_update_state(k, pr)) != 0) {
4066 sshkey_signatures_left(const struct sshkey *k)
4068 if (sshkey_type_plain(k->type) == KEY_XMSS)
4069 return sshkey_xmss_signatures_left(k);
4074 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4076 if (sshkey_type_plain(k->type) != KEY_XMSS)
4077 return SSH_ERR_INVALID_ARGUMENT;
4078 return sshkey_xmss_enable_maxsign(k, maxsign);
4082 sshkey_set_filename(struct sshkey *k, const char *filename)
4085 return SSH_ERR_INVALID_ARGUMENT;
4086 if (sshkey_type_plain(k->type) != KEY_XMSS)
4088 if (filename == NULL)
4089 return SSH_ERR_INVALID_ARGUMENT;
4090 if ((k->xmss_filename = strdup(filename)) == NULL)
4091 return SSH_ERR_ALLOC_FAIL;
4096 sshkey_private_serialize_maxsign(const struct sshkey *k, struct sshbuf *b,
4097 u_int32_t maxsign, sshkey_printfn *pr)
4099 return sshkey_private_serialize_opt(k, b, SSHKEY_SERIALIZE_DEFAULT);
4103 sshkey_signatures_left(const struct sshkey *k)
4109 sshkey_enable_maxsign(struct sshkey *k, u_int32_t maxsign)
4111 return SSH_ERR_INVALID_ARGUMENT;
4115 sshkey_set_filename(struct sshkey *k, const char *filename)
4118 return SSH_ERR_INVALID_ARGUMENT;
4121 #endif /* WITH_XMSS */