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-rw-r--r--Makefile.in3
-rw-r--r--pathnames.h3
-rw-r--r--ssh-ecdsa-sk.c180
-rw-r--r--sshkey.c205
-rw-r--r--sshkey.h19
5 files changed, 381 insertions, 29 deletions
diff --git a/Makefile.in b/Makefile.in
index adb1977e2..f22c83673 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -91,7 +91,8 @@ LIBSSH_OBJS=${LIBOPENSSH_OBJS} \
91 log.o match.o moduli.o nchan.o packet.o \ 91 log.o match.o moduli.o nchan.o packet.o \
92 readpass.o ttymodes.o xmalloc.o addrmatch.o \ 92 readpass.o ttymodes.o xmalloc.o addrmatch.o \
93 atomicio.o dispatch.o mac.o misc.o utf8.o \ 93 atomicio.o dispatch.o mac.o misc.o utf8.o \
94 monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-rsa.o dh.o \ 94 monitor_fdpass.o rijndael.o ssh-dss.o ssh-ecdsa.o ssh-ecdsa-sk.o \
95 ssh-rsa.o dh.o \
95 msg.o progressmeter.o dns.o entropy.o gss-genr.o umac.o umac128.o \ 96 msg.o progressmeter.o dns.o entropy.o gss-genr.o umac.o umac128.o \
96 ssh-pkcs11.o smult_curve25519_ref.o \ 97 ssh-pkcs11.o smult_curve25519_ref.o \
97 poly1305.o chacha.o cipher-chachapoly.o \ 98 poly1305.o chacha.o cipher-chachapoly.o \
diff --git a/pathnames.h b/pathnames.h
index cb44caa4d..2e0c7b15b 100644
--- a/pathnames.h
+++ b/pathnames.h
@@ -1,4 +1,4 @@
1/* $OpenBSD: pathnames.h,v 1.28 2018/02/23 15:58:37 markus Exp $ */ 1/* $OpenBSD: pathnames.h,v 1.29 2019/10/31 21:15:14 djm Exp $ */
2 2
3/* 3/*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -77,6 +77,7 @@
77#define _PATH_SSH_CLIENT_ID_RSA _PATH_SSH_USER_DIR "/id_rsa" 77#define _PATH_SSH_CLIENT_ID_RSA _PATH_SSH_USER_DIR "/id_rsa"
78#define _PATH_SSH_CLIENT_ID_ED25519 _PATH_SSH_USER_DIR "/id_ed25519" 78#define _PATH_SSH_CLIENT_ID_ED25519 _PATH_SSH_USER_DIR "/id_ed25519"
79#define _PATH_SSH_CLIENT_ID_XMSS _PATH_SSH_USER_DIR "/id_xmss" 79#define _PATH_SSH_CLIENT_ID_XMSS _PATH_SSH_USER_DIR "/id_xmss"
80#define _PATH_SSH_CLIENT_ID_ECDSA_SK _PATH_SSH_USER_DIR "/id_ecdsa_sk"
80 81
81/* 82/*
82 * Configuration file in user's home directory. This file need not be 83 * Configuration file in user's home directory. This file need not be
diff --git a/ssh-ecdsa-sk.c b/ssh-ecdsa-sk.c
new file mode 100644
index 000000000..6441cd7fa
--- /dev/null
+++ b/ssh-ecdsa-sk.c
@@ -0,0 +1,180 @@
1/* $OpenBSD: ssh-ecdsa-sk.c,v 1.1 2019/10/31 21:15:14 djm Exp $ */
2/*
3 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 * Copyright (c) 2010 Damien Miller. All rights reserved.
5 * Copyright (c) 2019 Google Inc. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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.
26 */
27
28/* #define DEBUG_SK 1 */
29
30#include "includes.h"
31
32#include <sys/types.h>
33
34#include <openssl/bn.h>
35#include <openssl/ec.h>
36#include <openssl/ecdsa.h>
37#include <openssl/evp.h>
38
39#include <string.h>
40#include <stdio.h> /* needed for DEBUG_SK only */
41
42#include "sshbuf.h"
43#include "ssherr.h"
44#include "digest.h"
45#define SSHKEY_INTERNAL
46#include "sshkey.h"
47
48/* ARGSUSED */
49int
50ssh_ecdsa_sk_verify(const struct sshkey *key,
51 const u_char *signature, size_t signaturelen,
52 const u_char *data, size_t datalen, u_int compat)
53{
54 ECDSA_SIG *sig = NULL;
55 BIGNUM *sig_r = NULL, *sig_s = NULL;
56 u_char sig_flags;
57 u_char msghash[32], apphash[32], sighash[32];
58 u_int sig_counter;
59 int ret = SSH_ERR_INTERNAL_ERROR;
60 struct sshbuf *b = NULL, *sigbuf = NULL, *original_signed = NULL;
61 char *ktype = NULL;
62#ifdef DEBUG_SK
63 char *tmp = NULL;
64#endif
65
66 if (key == NULL || key->ecdsa == NULL ||
67 sshkey_type_plain(key->type) != KEY_ECDSA_SK ||
68 signature == NULL || signaturelen == 0)
69 return SSH_ERR_INVALID_ARGUMENT;
70
71 if (key->ecdsa_nid != NID_X9_62_prime256v1)
72 return SSH_ERR_INTERNAL_ERROR;
73
74 /* fetch signature */
75 if ((b = sshbuf_from(signature, signaturelen)) == NULL)
76 return SSH_ERR_ALLOC_FAIL;
77 if (sshbuf_get_cstring(b, &ktype, NULL) != 0 ||
78 sshbuf_froms(b, &sigbuf) != 0) {
79 ret = SSH_ERR_INVALID_FORMAT;
80 goto out;
81 }
82 if (strcmp(sshkey_ssh_name_plain(key), ktype) != 0) {
83 ret = SSH_ERR_KEY_TYPE_MISMATCH;
84 goto out;
85 }
86 if (sshbuf_len(b) != 0) {
87 ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
88 goto out;
89 }
90
91 /* parse signature */
92 if (sshbuf_get_bignum2(sigbuf, &sig_r) != 0 ||
93 sshbuf_get_bignum2(sigbuf, &sig_s) != 0 ||
94 sshbuf_get_u8(sigbuf, &sig_flags) != 0 ||
95 sshbuf_get_u32(sigbuf, &sig_counter) != 0) {
96 ret = SSH_ERR_INVALID_FORMAT;
97 goto out;
98 }
99 if ((sig = ECDSA_SIG_new()) == NULL) {
100 ret = SSH_ERR_ALLOC_FAIL;
101 goto out;
102 }
103 if (!ECDSA_SIG_set0(sig, sig_r, sig_s)) {
104 ret = SSH_ERR_LIBCRYPTO_ERROR;
105 goto out;
106 }
107#ifdef DEBUG_SK
108 fprintf(stderr, "%s: sig_r: %s\n", __func__, (tmp = BN_bn2hex(sig_r)));
109 free(tmp);
110 fprintf(stderr, "%s: sig_s: %s\n", __func__, (tmp = BN_bn2hex(sig_s)));
111 free(tmp);
112 fprintf(stderr, "%s: sig_flags = 0x%02x, sig_counter = %u\n",
113 __func__, sig_flags, sig_counter);
114#endif
115 sig_r = sig_s = NULL; /* transferred */
116
117 if (sshbuf_len(sigbuf) != 0) {
118 ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
119 goto out;
120 }
121
122 /* Reconstruct data that was supposedly signed */
123 if ((original_signed = sshbuf_new()) == NULL)
124 return SSH_ERR_ALLOC_FAIL;
125 if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, data, datalen,
126 msghash, sizeof(msghash))) != 0)
127 goto out;
128 /* Application value is hashed before signature */
129 if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, key->sk_application,
130 strlen(key->sk_application), apphash, sizeof(apphash))) != 0)
131 goto out;
132#ifdef DEBUG_SK
133 fprintf(stderr, "%s: hashed message:\n", __func__);
134 sshbuf_dump_data(msghash, sizeof(msghash), stderr);
135#endif
136 if ((ret = sshbuf_put(original_signed,
137 apphash, sizeof(apphash))) != 0 ||
138 (ret = sshbuf_put_u8(original_signed, sig_flags)) != 0 ||
139 (ret = sshbuf_put_u32(original_signed, sig_counter)) != 0 ||
140 (ret = sshbuf_put(original_signed, msghash, sizeof(msghash))) != 0)
141 goto out;
142 /* Signature is over H(original_signed) */
143 if ((ret = ssh_digest_buffer(SSH_DIGEST_SHA256, original_signed,
144 sighash, sizeof(sighash))) != 0)
145 goto out;
146#ifdef DEBUG_SK
147 fprintf(stderr, "%s: signed buf:\n", __func__);
148 sshbuf_dump(original_signed, stderr);
149 fprintf(stderr, "%s: signed hash:\n", __func__);
150 sshbuf_dump_data(sighash, sizeof(sighash), stderr);
151#endif
152
153 /* Verify it */
154 switch (ECDSA_do_verify(sighash, sizeof(sighash), sig, key->ecdsa)) {
155 case 1:
156 ret = 0;
157 break;
158 case 0:
159 ret = SSH_ERR_SIGNATURE_INVALID;
160 goto out;
161 default:
162 ret = SSH_ERR_LIBCRYPTO_ERROR;
163 goto out;
164 }
165
166 out:
167 explicit_bzero(&sig_flags, sizeof(sig_flags));
168 explicit_bzero(&sig_counter, sizeof(sig_counter));
169 explicit_bzero(msghash, sizeof(msghash));
170 explicit_bzero(sighash, sizeof(msghash));
171 explicit_bzero(apphash, sizeof(apphash));
172 sshbuf_free(original_signed);
173 sshbuf_free(sigbuf);
174 sshbuf_free(b);
175 ECDSA_SIG_free(sig);
176 BN_clear_free(sig_r);
177 BN_clear_free(sig_s);
178 free(ktype);
179 return ret;
180}
diff --git a/sshkey.c b/sshkey.c
index ef90563b3..d87fee8ee 100644
--- a/sshkey.c
+++ b/sshkey.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: sshkey.c,v 1.84 2019/10/09 00:04:42 djm Exp $ */ 1/* $OpenBSD: sshkey.c,v 1.85 2019/10/31 21:15:14 djm Exp $ */
2/* 2/*
3 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. 3 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
4 * Copyright (c) 2008 Alexander von Gernler. All rights reserved. 4 * Copyright (c) 2008 Alexander von Gernler. All rights reserved.
@@ -125,6 +125,8 @@ static const struct keytype keytypes[] = {
125 { "ecdsa-sha2-nistp521", "ECDSA", NULL, 125 { "ecdsa-sha2-nistp521", "ECDSA", NULL,
126 KEY_ECDSA, NID_secp521r1, 0, 0 }, 126 KEY_ECDSA, NID_secp521r1, 0, 0 },
127# endif /* OPENSSL_HAS_NISTP521 */ 127# endif /* OPENSSL_HAS_NISTP521 */
128 { "sk-ecdsa-sha2-nistp256@openssh.com", "ECDSA-SK", NULL,
129 KEY_ECDSA_SK, NID_X9_62_prime256v1, 0, 0 },
128# endif /* OPENSSL_HAS_ECC */ 130# endif /* OPENSSL_HAS_ECC */
129 { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL, 131 { "ssh-rsa-cert-v01@openssh.com", "RSA-CERT", NULL,
130 KEY_RSA_CERT, 0, 1, 0 }, 132 KEY_RSA_CERT, 0, 1, 0 },
@@ -143,6 +145,8 @@ static const struct keytype keytypes[] = {
143 { "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", NULL, 145 { "ecdsa-sha2-nistp521-cert-v01@openssh.com", "ECDSA-CERT", NULL,
144 KEY_ECDSA_CERT, NID_secp521r1, 1, 0 }, 146 KEY_ECDSA_CERT, NID_secp521r1, 1, 0 },
145# endif /* OPENSSL_HAS_NISTP521 */ 147# endif /* OPENSSL_HAS_NISTP521 */
148 { "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com", "ECDSA-SK-CERT", NULL,
149 KEY_ECDSA_SK_CERT, NID_X9_62_prime256v1, 1, 0 },
146# endif /* OPENSSL_HAS_ECC */ 150# endif /* OPENSSL_HAS_ECC */
147#endif /* WITH_OPENSSL */ 151#endif /* WITH_OPENSSL */
148 { NULL, NULL, NULL, -1, -1, 0, 0 } 152 { NULL, NULL, NULL, -1, -1, 0, 0 }
@@ -211,13 +215,26 @@ sshkey_type_from_name(const char *name)
211 return KEY_UNSPEC; 215 return KEY_UNSPEC;
212} 216}
213 217
218static int
219key_type_is_ecdsa_variant(int type)
220{
221 switch (type) {
222 case KEY_ECDSA:
223 case KEY_ECDSA_CERT:
224 case KEY_ECDSA_SK:
225 case KEY_ECDSA_SK_CERT:
226 return 1;
227 }
228 return 0;
229}
230
214int 231int
215sshkey_ecdsa_nid_from_name(const char *name) 232sshkey_ecdsa_nid_from_name(const char *name)
216{ 233{
217 const struct keytype *kt; 234 const struct keytype *kt;
218 235
219 for (kt = keytypes; kt->type != -1; kt++) { 236 for (kt = keytypes; kt->type != -1; kt++) {
220 if (kt->type != KEY_ECDSA && kt->type != KEY_ECDSA_CERT) 237 if (!key_type_is_ecdsa_variant(kt->type))
221 continue; 238 continue;
222 if (kt->name != NULL && strcmp(name, kt->name) == 0) 239 if (kt->name != NULL && strcmp(name, kt->name) == 0)
223 return kt->nid; 240 return kt->nid;
@@ -313,6 +330,8 @@ sshkey_size(const struct sshkey *k)
313 return BN_num_bits(dsa_p); 330 return BN_num_bits(dsa_p);
314 case KEY_ECDSA: 331 case KEY_ECDSA:
315 case KEY_ECDSA_CERT: 332 case KEY_ECDSA_CERT:
333 case KEY_ECDSA_SK:
334 case KEY_ECDSA_SK_CERT:
316 return sshkey_curve_nid_to_bits(k->ecdsa_nid); 335 return sshkey_curve_nid_to_bits(k->ecdsa_nid);
317#endif /* WITH_OPENSSL */ 336#endif /* WITH_OPENSSL */
318 case KEY_ED25519: 337 case KEY_ED25519:
@@ -331,6 +350,7 @@ sshkey_type_is_valid_ca(int type)
331 case KEY_RSA: 350 case KEY_RSA:
332 case KEY_DSA: 351 case KEY_DSA:
333 case KEY_ECDSA: 352 case KEY_ECDSA:
353 case KEY_ECDSA_SK:
334 case KEY_ED25519: 354 case KEY_ED25519:
335 case KEY_XMSS: 355 case KEY_XMSS:
336 return 1; 356 return 1;
@@ -358,6 +378,8 @@ sshkey_type_plain(int type)
358 return KEY_DSA; 378 return KEY_DSA;
359 case KEY_ECDSA_CERT: 379 case KEY_ECDSA_CERT:
360 return KEY_ECDSA; 380 return KEY_ECDSA;
381 case KEY_ECDSA_SK_CERT:
382 return KEY_ECDSA_SK;
361 case KEY_ED25519_CERT: 383 case KEY_ED25519_CERT:
362 return KEY_ED25519; 384 return KEY_ED25519;
363 case KEY_XMSS_CERT: 385 case KEY_XMSS_CERT:
@@ -533,6 +555,8 @@ sshkey_new(int type)
533 break; 555 break;
534 case KEY_ECDSA: 556 case KEY_ECDSA:
535 case KEY_ECDSA_CERT: 557 case KEY_ECDSA_CERT:
558 case KEY_ECDSA_SK:
559 case KEY_ECDSA_SK_CERT:
536 /* Cannot do anything until we know the group */ 560 /* Cannot do anything until we know the group */
537 break; 561 break;
538#endif /* WITH_OPENSSL */ 562#endif /* WITH_OPENSSL */
@@ -577,6 +601,12 @@ sshkey_free(struct sshkey *k)
577 k->dsa = NULL; 601 k->dsa = NULL;
578 break; 602 break;
579# ifdef OPENSSL_HAS_ECC 603# ifdef OPENSSL_HAS_ECC
604 case KEY_ECDSA_SK:
605 case KEY_ECDSA_SK_CERT:
606 free(k->sk_application);
607 sshbuf_free(k->sk_key_handle);
608 sshbuf_free(k->sk_reserved);
609 /* FALLTHROUGH */
580 case KEY_ECDSA: 610 case KEY_ECDSA:
581 case KEY_ECDSA_CERT: 611 case KEY_ECDSA_CERT:
582 EC_KEY_free(k->ecdsa); 612 EC_KEY_free(k->ecdsa);
@@ -676,6 +706,13 @@ sshkey_equal_public(const struct sshkey *a, const struct sshkey *b)
676 BN_cmp(dsa_g_a, dsa_g_b) == 0 && 706 BN_cmp(dsa_g_a, dsa_g_b) == 0 &&
677 BN_cmp(dsa_pub_key_a, dsa_pub_key_b) == 0; 707 BN_cmp(dsa_pub_key_a, dsa_pub_key_b) == 0;
678# ifdef OPENSSL_HAS_ECC 708# ifdef OPENSSL_HAS_ECC
709 case KEY_ECDSA_SK:
710 case KEY_ECDSA_SK_CERT:
711 if (a->sk_application == NULL || b->sk_application == NULL)
712 return 0;
713 if (strcmp(a->sk_application, b->sk_application) != 0)
714 return 0;
715 /* FALLTHROUGH */
679 case KEY_ECDSA_CERT: 716 case KEY_ECDSA_CERT:
680 case KEY_ECDSA: 717 case KEY_ECDSA:
681 if (a->ecdsa == NULL || b->ecdsa == NULL || 718 if (a->ecdsa == NULL || b->ecdsa == NULL ||
@@ -751,6 +788,7 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
751#ifdef WITH_OPENSSL 788#ifdef WITH_OPENSSL
752 case KEY_DSA_CERT: 789 case KEY_DSA_CERT:
753 case KEY_ECDSA_CERT: 790 case KEY_ECDSA_CERT:
791 case KEY_ECDSA_SK_CERT:
754 case KEY_RSA_CERT: 792 case KEY_RSA_CERT:
755#endif /* WITH_OPENSSL */ 793#endif /* WITH_OPENSSL */
756 case KEY_ED25519_CERT: 794 case KEY_ED25519_CERT:
@@ -777,6 +815,7 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
777 break; 815 break;
778# ifdef OPENSSL_HAS_ECC 816# ifdef OPENSSL_HAS_ECC
779 case KEY_ECDSA: 817 case KEY_ECDSA:
818 case KEY_ECDSA_SK:
780 if (key->ecdsa == NULL) 819 if (key->ecdsa == NULL)
781 return SSH_ERR_INVALID_ARGUMENT; 820 return SSH_ERR_INVALID_ARGUMENT;
782 if ((ret = sshbuf_put_cstring(b, typename)) != 0 || 821 if ((ret = sshbuf_put_cstring(b, typename)) != 0 ||
@@ -784,6 +823,11 @@ to_blob_buf(const struct sshkey *key, struct sshbuf *b, int force_plain,
784 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 || 823 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
785 (ret = sshbuf_put_eckey(b, key->ecdsa)) != 0) 824 (ret = sshbuf_put_eckey(b, key->ecdsa)) != 0)
786 return ret; 825 return ret;
826 if (type == KEY_ECDSA_SK) {
827 if ((ret = sshbuf_put_cstring(b,
828 key->sk_application)) != 0)
829 return ret;
830 }
787 break; 831 break;
788# endif 832# endif
789 case KEY_RSA: 833 case KEY_RSA:
@@ -1217,7 +1261,7 @@ peek_type_nid(const char *s, size_t l, int *nid)
1217 continue; 1261 continue;
1218 if (memcmp(s, kt->name, l) == 0) { 1262 if (memcmp(s, kt->name, l) == 0) {
1219 *nid = -1; 1263 *nid = -1;
1220 if (kt->type == KEY_ECDSA || kt->type == KEY_ECDSA_CERT) 1264 if (key_type_is_ecdsa_variant(kt->type))
1221 *nid = kt->nid; 1265 *nid = kt->nid;
1222 return kt->type; 1266 return kt->type;
1223 } 1267 }
@@ -1243,9 +1287,11 @@ sshkey_read(struct sshkey *ret, char **cpp)
1243 case KEY_RSA: 1287 case KEY_RSA:
1244 case KEY_DSA: 1288 case KEY_DSA:
1245 case KEY_ECDSA: 1289 case KEY_ECDSA:
1290 case KEY_ECDSA_SK:
1246 case KEY_ED25519: 1291 case KEY_ED25519:
1247 case KEY_DSA_CERT: 1292 case KEY_DSA_CERT:
1248 case KEY_ECDSA_CERT: 1293 case KEY_ECDSA_CERT:
1294 case KEY_ECDSA_SK_CERT:
1249 case KEY_RSA_CERT: 1295 case KEY_RSA_CERT:
1250 case KEY_ED25519_CERT: 1296 case KEY_ED25519_CERT:
1251#ifdef WITH_XMSS 1297#ifdef WITH_XMSS
@@ -1302,7 +1348,7 @@ sshkey_read(struct sshkey *ret, char **cpp)
1302 sshkey_free(k); 1348 sshkey_free(k);
1303 return SSH_ERR_KEY_TYPE_MISMATCH; 1349 return SSH_ERR_KEY_TYPE_MISMATCH;
1304 } 1350 }
1305 if (sshkey_type_plain(type) == KEY_ECDSA && curve_nid != k->ecdsa_nid) { 1351 if (key_type_is_ecdsa_variant(type) && curve_nid != k->ecdsa_nid) {
1306 sshkey_free(k); 1352 sshkey_free(k);
1307 return SSH_ERR_EC_CURVE_MISMATCH; 1353 return SSH_ERR_EC_CURVE_MISMATCH;
1308 } 1354 }
@@ -1348,6 +1394,19 @@ sshkey_read(struct sshkey *ret, char **cpp)
1348 sshkey_dump_ec_key(ret->ecdsa); 1394 sshkey_dump_ec_key(ret->ecdsa);
1349#endif 1395#endif
1350 break; 1396 break;
1397 case KEY_ECDSA_SK:
1398 EC_KEY_free(ret->ecdsa);
1399 ret->ecdsa = k->ecdsa;
1400 ret->ecdsa_nid = k->ecdsa_nid;
1401 ret->sk_application = k->sk_application;
1402 k->ecdsa = NULL;
1403 k->ecdsa_nid = -1;
1404 k->sk_application = NULL;
1405#ifdef DEBUG_PK
1406 sshkey_dump_ec_key(ret->ecdsa);
1407 fprintf(stderr, "App: %s\n", ret->sk_application);
1408#endif
1409 break;
1351# endif /* OPENSSL_HAS_ECC */ 1410# endif /* OPENSSL_HAS_ECC */
1352#endif /* WITH_OPENSSL */ 1411#endif /* WITH_OPENSSL */
1353 case KEY_ED25519: 1412 case KEY_ED25519:
@@ -1747,15 +1806,14 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1747#endif /* WITH_OPENSSL */ 1806#endif /* WITH_OPENSSL */
1748 1807
1749 *pkp = NULL; 1808 *pkp = NULL;
1809 if ((n = sshkey_new(k->type)) == NULL) {
1810 r = SSH_ERR_ALLOC_FAIL;
1811 goto out;
1812 }
1750 switch (k->type) { 1813 switch (k->type) {
1751#ifdef WITH_OPENSSL 1814#ifdef WITH_OPENSSL
1752 case KEY_DSA: 1815 case KEY_DSA:
1753 case KEY_DSA_CERT: 1816 case KEY_DSA_CERT:
1754 if ((n = sshkey_new(k->type)) == NULL) {
1755 r = SSH_ERR_ALLOC_FAIL;
1756 goto out;
1757 }
1758
1759 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g); 1817 DSA_get0_pqg(k->dsa, &dsa_p, &dsa_q, &dsa_g);
1760 DSA_get0_key(k->dsa, &dsa_pub_key, NULL); 1818 DSA_get0_key(k->dsa, &dsa_pub_key, NULL);
1761 if ((dsa_p_dup = BN_dup(dsa_p)) == NULL || 1819 if ((dsa_p_dup = BN_dup(dsa_p)) == NULL ||
@@ -1780,10 +1838,8 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1780# ifdef OPENSSL_HAS_ECC 1838# ifdef OPENSSL_HAS_ECC
1781 case KEY_ECDSA: 1839 case KEY_ECDSA:
1782 case KEY_ECDSA_CERT: 1840 case KEY_ECDSA_CERT:
1783 if ((n = sshkey_new(k->type)) == NULL) { 1841 case KEY_ECDSA_SK:
1784 r = SSH_ERR_ALLOC_FAIL; 1842 case KEY_ECDSA_SK_CERT:
1785 goto out;
1786 }
1787 n->ecdsa_nid = k->ecdsa_nid; 1843 n->ecdsa_nid = k->ecdsa_nid;
1788 n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid); 1844 n->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
1789 if (n->ecdsa == NULL) { 1845 if (n->ecdsa == NULL) {
@@ -1795,14 +1851,15 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1795 r = SSH_ERR_LIBCRYPTO_ERROR; 1851 r = SSH_ERR_LIBCRYPTO_ERROR;
1796 goto out; 1852 goto out;
1797 } 1853 }
1854 if (k->type != KEY_ECDSA_SK && k->type != KEY_ECDSA_SK_CERT)
1855 break;
1856 /* Append security-key application string */
1857 if ((n->sk_application = strdup(k->sk_application)) == NULL)
1858 goto out;
1798 break; 1859 break;
1799# endif /* OPENSSL_HAS_ECC */ 1860# endif /* OPENSSL_HAS_ECC */
1800 case KEY_RSA: 1861 case KEY_RSA:
1801 case KEY_RSA_CERT: 1862 case KEY_RSA_CERT:
1802 if ((n = sshkey_new(k->type)) == NULL) {
1803 r = SSH_ERR_ALLOC_FAIL;
1804 goto out;
1805 }
1806 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL); 1863 RSA_get0_key(k->rsa, &rsa_n, &rsa_e, NULL);
1807 if ((rsa_n_dup = BN_dup(rsa_n)) == NULL || 1864 if ((rsa_n_dup = BN_dup(rsa_n)) == NULL ||
1808 (rsa_e_dup = BN_dup(rsa_e)) == NULL) { 1865 (rsa_e_dup = BN_dup(rsa_e)) == NULL) {
@@ -1818,10 +1875,6 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1818#endif /* WITH_OPENSSL */ 1875#endif /* WITH_OPENSSL */
1819 case KEY_ED25519: 1876 case KEY_ED25519:
1820 case KEY_ED25519_CERT: 1877 case KEY_ED25519_CERT:
1821 if ((n = sshkey_new(k->type)) == NULL) {
1822 r = SSH_ERR_ALLOC_FAIL;
1823 goto out;
1824 }
1825 if (k->ed25519_pk != NULL) { 1878 if (k->ed25519_pk != NULL) {
1826 if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) { 1879 if ((n->ed25519_pk = malloc(ED25519_PK_SZ)) == NULL) {
1827 r = SSH_ERR_ALLOC_FAIL; 1880 r = SSH_ERR_ALLOC_FAIL;
@@ -1833,10 +1886,6 @@ sshkey_from_private(const struct sshkey *k, struct sshkey **pkp)
1833#ifdef WITH_XMSS 1886#ifdef WITH_XMSS
1834 case KEY_XMSS: 1887 case KEY_XMSS:
1835 case KEY_XMSS_CERT: 1888 case KEY_XMSS_CERT:
1836 if ((n = sshkey_new(k->type)) == NULL) {
1837 r = SSH_ERR_ALLOC_FAIL;
1838 goto out;
1839 }
1840 if ((r = sshkey_xmss_init(n, k->xmss_name)) != 0) 1889 if ((r = sshkey_xmss_init(n, k->xmss_name)) != 0)
1841 goto out; 1890 goto out;
1842 if (k->xmss_pk != NULL) { 1891 if (k->xmss_pk != NULL) {
@@ -2329,6 +2378,7 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
2329#endif 2378#endif
2330 break; 2379 break;
2331 case KEY_ECDSA_CERT: 2380 case KEY_ECDSA_CERT:
2381 case KEY_ECDSA_SK_CERT:
2332 /* Skip nonce */ 2382 /* Skip nonce */
2333 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) { 2383 if (sshbuf_get_string_direct(b, NULL, NULL) != 0) {
2334 ret = SSH_ERR_INVALID_FORMAT; 2384 ret = SSH_ERR_INVALID_FORMAT;
@@ -2337,6 +2387,7 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
2337 /* FALLTHROUGH */ 2387 /* FALLTHROUGH */
2338# ifdef OPENSSL_HAS_ECC 2388# ifdef OPENSSL_HAS_ECC
2339 case KEY_ECDSA: 2389 case KEY_ECDSA:
2390 case KEY_ECDSA_SK:
2340 if ((key = sshkey_new(type)) == NULL) { 2391 if ((key = sshkey_new(type)) == NULL) {
2341 ret = SSH_ERR_ALLOC_FAIL; 2392 ret = SSH_ERR_ALLOC_FAIL;
2342 goto out; 2393 goto out;
@@ -2377,6 +2428,17 @@ sshkey_from_blob_internal(struct sshbuf *b, struct sshkey **keyp,
2377#ifdef DEBUG_PK 2428#ifdef DEBUG_PK
2378 sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q); 2429 sshkey_dump_ec_point(EC_KEY_get0_group(key->ecdsa), q);
2379#endif 2430#endif
2431 if (type == KEY_ECDSA_SK || type == KEY_ECDSA_SK_CERT) {
2432 /* Parse additional security-key application string */
2433 if (sshbuf_get_cstring(b, &key->sk_application,
2434 NULL) != 0) {
2435 ret = SSH_ERR_INVALID_FORMAT;
2436 goto out;
2437 }
2438#ifdef DEBUG_PK
2439 fprintf(stderr, "App: %s\n", key->sk_application);
2440#endif
2441 }
2380 break; 2442 break;
2381# endif /* OPENSSL_HAS_ECC */ 2443# endif /* OPENSSL_HAS_ECC */
2382#endif /* WITH_OPENSSL */ 2444#endif /* WITH_OPENSSL */
@@ -2665,6 +2727,10 @@ sshkey_verify(const struct sshkey *key,
2665 case KEY_ECDSA_CERT: 2727 case KEY_ECDSA_CERT:
2666 case KEY_ECDSA: 2728 case KEY_ECDSA:
2667 return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat); 2729 return ssh_ecdsa_verify(key, sig, siglen, data, dlen, compat);
2730 case KEY_ECDSA_SK_CERT:
2731 case KEY_ECDSA_SK:
2732 return ssh_ecdsa_sk_verify(key, sig, siglen, data, dlen,
2733 compat);
2668# endif /* OPENSSL_HAS_ECC */ 2734# endif /* OPENSSL_HAS_ECC */
2669 case KEY_RSA_CERT: 2735 case KEY_RSA_CERT:
2670 case KEY_RSA: 2736 case KEY_RSA:
@@ -2700,6 +2766,9 @@ sshkey_to_certified(struct sshkey *k)
2700 case KEY_ECDSA: 2766 case KEY_ECDSA:
2701 newtype = KEY_ECDSA_CERT; 2767 newtype = KEY_ECDSA_CERT;
2702 break; 2768 break;
2769 case KEY_ECDSA_SK:
2770 newtype = KEY_ECDSA_SK_CERT;
2771 break;
2703#endif /* WITH_OPENSSL */ 2772#endif /* WITH_OPENSSL */
2704 case KEY_ED25519: 2773 case KEY_ED25519:
2705 newtype = KEY_ED25519_CERT; 2774 newtype = KEY_ED25519_CERT;
@@ -2797,12 +2866,18 @@ sshkey_certify_custom(struct sshkey *k, struct sshkey *ca, const char *alg,
2797 break; 2866 break;
2798# ifdef OPENSSL_HAS_ECC 2867# ifdef OPENSSL_HAS_ECC
2799 case KEY_ECDSA_CERT: 2868 case KEY_ECDSA_CERT:
2869 case KEY_ECDSA_SK_CERT:
2800 if ((ret = sshbuf_put_cstring(cert, 2870 if ((ret = sshbuf_put_cstring(cert,
2801 sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 || 2871 sshkey_curve_nid_to_name(k->ecdsa_nid))) != 0 ||
2802 (ret = sshbuf_put_ec(cert, 2872 (ret = sshbuf_put_ec(cert,
2803 EC_KEY_get0_public_key(k->ecdsa), 2873 EC_KEY_get0_public_key(k->ecdsa),
2804 EC_KEY_get0_group(k->ecdsa))) != 0) 2874 EC_KEY_get0_group(k->ecdsa))) != 0)
2805 goto out; 2875 goto out;
2876 if (k->type == KEY_ECDSA_SK_CERT) {
2877 if ((ret = sshbuf_put_cstring(cert,
2878 k->sk_application)) != 0)
2879 goto out;
2880 }
2806 break; 2881 break;
2807# endif /* OPENSSL_HAS_ECC */ 2882# endif /* OPENSSL_HAS_ECC */
2808 case KEY_RSA_CERT: 2883 case KEY_RSA_CERT:
@@ -3082,6 +3157,28 @@ sshkey_private_serialize_opt(struct sshkey *key, struct sshbuf *buf,
3082 EC_KEY_get0_private_key(key->ecdsa))) != 0) 3157 EC_KEY_get0_private_key(key->ecdsa))) != 0)
3083 goto out; 3158 goto out;
3084 break; 3159 break;
3160 case KEY_ECDSA_SK:
3161 if ((r = sshbuf_put_cstring(b,
3162 sshkey_curve_nid_to_name(key->ecdsa_nid))) != 0 ||
3163 (r = sshbuf_put_eckey(b, key->ecdsa)) != 0 ||
3164 (r = sshbuf_put_cstring(b, key->sk_application)) != 0 ||
3165 (r = sshbuf_put_u8(b, key->sk_flags)) != 0 ||
3166 (r = sshbuf_put_stringb(b, key->sk_key_handle)) != 0 ||
3167 (r = sshbuf_put_stringb(b, key->sk_reserved)) != 0)
3168 goto out;
3169 break;
3170 case KEY_ECDSA_SK_CERT:
3171 if (key->cert == NULL || sshbuf_len(key->cert->certblob) == 0) {
3172 r = SSH_ERR_INVALID_ARGUMENT;
3173 goto out;
3174 }
3175 if ((r = sshbuf_put_stringb(b, key->cert->certblob)) != 0 ||
3176 (r = sshbuf_put_cstring(b, key->sk_application)) != 0 ||
3177 (r = sshbuf_put_u8(b, key->sk_flags)) != 0 ||
3178 (r = sshbuf_put_stringb(b, key->sk_key_handle)) != 0 ||
3179 (r = sshbuf_put_stringb(b, key->sk_reserved)) != 0)
3180 goto out;
3181 break;
3085# endif /* OPENSSL_HAS_ECC */ 3182# endif /* OPENSSL_HAS_ECC */
3086#endif /* WITH_OPENSSL */ 3183#endif /* WITH_OPENSSL */
3087 case KEY_ED25519: 3184 case KEY_ED25519:
@@ -3270,6 +3367,60 @@ sshkey_private_deserialize(struct sshbuf *buf, struct sshkey **kp)
3270 (r = sshkey_ec_validate_private(k->ecdsa)) != 0) 3367 (r = sshkey_ec_validate_private(k->ecdsa)) != 0)
3271 goto out; 3368 goto out;
3272 break; 3369 break;
3370 case KEY_ECDSA_SK:
3371 if ((k = sshkey_new(type)) == NULL) {
3372 r = SSH_ERR_ALLOC_FAIL;
3373 goto out;
3374 }
3375 if ((k->ecdsa_nid = sshkey_ecdsa_nid_from_name(tname)) == -1) {
3376 r = SSH_ERR_INVALID_ARGUMENT;
3377 goto out;
3378 }
3379 if ((r = sshbuf_get_cstring(buf, &curve, NULL)) != 0)
3380 goto out;
3381 if (k->ecdsa_nid != sshkey_curve_name_to_nid(curve)) {
3382 r = SSH_ERR_EC_CURVE_MISMATCH;
3383 goto out;
3384 }
3385 if ((k->sk_key_handle = sshbuf_new()) == NULL ||
3386 (k->sk_reserved = sshbuf_new()) == NULL) {
3387 r = SSH_ERR_ALLOC_FAIL;
3388 goto out;
3389 }
3390 k->ecdsa = EC_KEY_new_by_curve_name(k->ecdsa_nid);
3391 if (k->ecdsa == NULL) {
3392 r = SSH_ERR_LIBCRYPTO_ERROR;
3393 goto out;
3394 }
3395 if ((r = sshbuf_get_eckey(buf, k->ecdsa)) != 0 ||
3396 (r = sshbuf_get_cstring(buf, &k->sk_application,
3397 NULL)) != 0 ||
3398 (r = sshbuf_get_u8(buf, &k->sk_flags)) != 0 ||
3399 (r = sshbuf_get_stringb(buf, k->sk_key_handle)) != 0 ||
3400 (r = sshbuf_get_stringb(buf, k->sk_reserved)) != 0)
3401 goto out;
3402 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
3403 EC_KEY_get0_public_key(k->ecdsa))) != 0)
3404 goto out;
3405 break;
3406 case KEY_ECDSA_SK_CERT:
3407 if ((r = sshkey_froms(buf, &k)) != 0)
3408 goto out;
3409 if ((k->sk_key_handle = sshbuf_new()) == NULL ||
3410 (k->sk_reserved = sshbuf_new()) == NULL) {
3411 r = SSH_ERR_ALLOC_FAIL;
3412 goto out;
3413 }
3414 if ((r = sshbuf_get_cstring(buf, &k->sk_application,
3415 NULL)) != 0 ||
3416 (r = sshbuf_get_u8(buf, &k->sk_flags)) != 0 ||
3417 (r = sshbuf_get_stringb(buf, k->sk_key_handle)) != 0 ||
3418 (r = sshbuf_get_stringb(buf, k->sk_reserved)) != 0)
3419 goto out;
3420 if ((r = sshkey_ec_validate_public(EC_KEY_get0_group(k->ecdsa),
3421 EC_KEY_get0_public_key(k->ecdsa))) != 0)
3422 goto out;
3423 break;
3273# endif /* OPENSSL_HAS_ECC */ 3424# endif /* OPENSSL_HAS_ECC */
3274 case KEY_RSA: 3425 case KEY_RSA:
3275 if ((k = sshkey_new(type)) == NULL) { 3426 if ((k = sshkey_new(type)) == NULL) {
@@ -4090,6 +4241,9 @@ sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
4090#ifdef WITH_XMSS 4241#ifdef WITH_XMSS
4091 case KEY_XMSS: 4242 case KEY_XMSS:
4092#endif /* WITH_XMSS */ 4243#endif /* WITH_XMSS */
4244#ifdef WITH_OPENSSL
4245 case KEY_ECDSA_SK:
4246#endif /* WITH_OPENSSL */
4093 return sshkey_private_to_blob2(key, blob, passphrase, 4247 return sshkey_private_to_blob2(key, blob, passphrase,
4094 comment, openssh_format_cipher, openssh_format_rounds); 4248 comment, openssh_format_cipher, openssh_format_rounds);
4095 default: 4249 default:
@@ -4111,7 +4265,6 @@ sshkey_private_to_fileblob(struct sshkey *key, struct sshbuf *blob,
4111#endif /* WITH_OPENSSL */ 4265#endif /* WITH_OPENSSL */
4112} 4266}
4113 4267
4114
4115#ifdef WITH_OPENSSL 4268#ifdef WITH_OPENSSL
4116static int 4269static int
4117translate_libcrypto_error(unsigned long pem_err) 4270translate_libcrypto_error(unsigned long pem_err)
diff --git a/sshkey.h b/sshkey.h
index 1119a7b07..2edcb13ab 100644
--- a/sshkey.h
+++ b/sshkey.h
@@ -1,4 +1,4 @@
1/* $OpenBSD: sshkey.h,v 1.34 2019/09/03 08:31:20 djm Exp $ */ 1/* $OpenBSD: sshkey.h,v 1.35 2019/10/31 21:15:14 djm Exp $ */
2 2
3/* 3/*
4 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. 4 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
@@ -65,6 +65,8 @@ enum sshkey_types {
65 KEY_ED25519_CERT, 65 KEY_ED25519_CERT,
66 KEY_XMSS, 66 KEY_XMSS,
67 KEY_XMSS_CERT, 67 KEY_XMSS_CERT,
68 KEY_ECDSA_SK,
69 KEY_ECDSA_SK_CERT,
68 KEY_UNSPEC 70 KEY_UNSPEC
69}; 71};
70 72
@@ -118,18 +120,30 @@ struct sshkey_cert {
118struct sshkey { 120struct sshkey {
119 int type; 121 int type;
120 int flags; 122 int flags;
123 /* KEY_RSA */
121 RSA *rsa; 124 RSA *rsa;
125 /* KEY_DSA */
122 DSA *dsa; 126 DSA *dsa;
127 /* KEY_ECDSA and KEY_ECDSA_SK */
123 int ecdsa_nid; /* NID of curve */ 128 int ecdsa_nid; /* NID of curve */
124 EC_KEY *ecdsa; 129 EC_KEY *ecdsa;
130 /* KEY_ED25519 */
125 u_char *ed25519_sk; 131 u_char *ed25519_sk;
126 u_char *ed25519_pk; 132 u_char *ed25519_pk;
133 /* KEY_XMSS */
127 char *xmss_name; 134 char *xmss_name;
128 char *xmss_filename; /* for state file updates */ 135 char *xmss_filename; /* for state file updates */
129 void *xmss_state; /* depends on xmss_name, opaque */ 136 void *xmss_state; /* depends on xmss_name, opaque */
130 u_char *xmss_sk; 137 u_char *xmss_sk;
131 u_char *xmss_pk; 138 u_char *xmss_pk;
139 /* KEY_ECDSA_SK */
140 char *sk_application;
141 uint8_t sk_flags;
142 struct sshbuf *sk_key_handle;
143 struct sshbuf *sk_reserved;
144 /* Certificates */
132 struct sshkey_cert *cert; 145 struct sshkey_cert *cert;
146 /* Private key shielding */
133 u_char *shielded_private; 147 u_char *shielded_private;
134 size_t shielded_len; 148 size_t shielded_len;
135 u_char *shield_prekey; 149 u_char *shield_prekey;
@@ -268,6 +282,9 @@ int ssh_ecdsa_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
268int ssh_ecdsa_verify(const struct sshkey *key, 282int ssh_ecdsa_verify(const struct sshkey *key,
269 const u_char *signature, size_t signaturelen, 283 const u_char *signature, size_t signaturelen,
270 const u_char *data, size_t datalen, u_int compat); 284 const u_char *data, size_t datalen, u_int compat);
285int ssh_ecdsa_sk_verify(const struct sshkey *key,
286 const u_char *signature, size_t signaturelen,
287 const u_char *data, size_t datalen, u_int compat);
271int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp, 288int ssh_ed25519_sign(const struct sshkey *key, u_char **sigp, size_t *lenp,
272 const u_char *data, size_t datalen, u_int compat); 289 const u_char *data, size_t datalen, u_int compat);
273int ssh_ed25519_verify(const struct sshkey *key, 290int ssh_ed25519_verify(const struct sshkey *key,
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 10:37:55 +0000