/src/openssh/ssh-ecdsa-sk.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* $OpenBSD: ssh-ecdsa-sk.c,v 1.18 2023/03/08 04:43:12 guenther 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 | | #ifdef WITH_OPENSSL |
35 | | #include <openssl/bn.h> |
36 | | #include <openssl/ec.h> |
37 | | #include <openssl/ecdsa.h> |
38 | | #include <openssl/evp.h> |
39 | | #endif |
40 | | |
41 | | #include <string.h> |
42 | | #include <stdio.h> /* needed for DEBUG_SK only */ |
43 | | |
44 | | #include "openbsd-compat/openssl-compat.h" |
45 | | |
46 | | #include "sshbuf.h" |
47 | | #include "ssherr.h" |
48 | | #include "digest.h" |
49 | | #define SSHKEY_INTERNAL |
50 | | #include "sshkey.h" |
51 | | |
52 | | #ifndef OPENSSL_HAS_ECC |
53 | | /* ARGSUSED */ |
54 | | int |
55 | | ssh_ecdsa_sk_verify(const struct sshkey *key, |
56 | | const u_char *signature, size_t signaturelen, |
57 | | const u_char *data, size_t datalen, u_int compat, |
58 | | struct sshkey_sig_details **detailsp) |
59 | | { |
60 | | return SSH_ERR_FEATURE_UNSUPPORTED; |
61 | | } |
62 | | #else /* OPENSSL_HAS_ECC */ |
63 | | |
64 | | /* Reuse some ECDSA internals */ |
65 | | extern struct sshkey_impl_funcs sshkey_ecdsa_funcs; |
66 | | |
67 | | static void |
68 | | ssh_ecdsa_sk_cleanup(struct sshkey *k) |
69 | 6 | { |
70 | 6 | sshkey_sk_cleanup(k); |
71 | 6 | sshkey_ecdsa_funcs.cleanup(k); |
72 | 6 | } |
73 | | |
74 | | static int |
75 | | ssh_ecdsa_sk_equal(const struct sshkey *a, const struct sshkey *b) |
76 | 0 | { |
77 | 0 | if (!sshkey_sk_fields_equal(a, b)) |
78 | 0 | return 0; |
79 | 0 | if (!sshkey_ecdsa_funcs.equal(a, b)) |
80 | 0 | return 0; |
81 | 0 | return 1; |
82 | 0 | } |
83 | | |
84 | | static int |
85 | | ssh_ecdsa_sk_serialize_public(const struct sshkey *key, struct sshbuf *b, |
86 | | enum sshkey_serialize_rep opts) |
87 | 0 | { |
88 | 0 | int r; |
89 | |
|
90 | 0 | if ((r = sshkey_ecdsa_funcs.serialize_public(key, b, opts)) != 0) |
91 | 0 | return r; |
92 | 0 | if ((r = sshkey_serialize_sk(key, b)) != 0) |
93 | 0 | return r; |
94 | | |
95 | 0 | return 0; |
96 | 0 | } |
97 | | |
98 | | static int |
99 | | ssh_ecdsa_sk_serialize_private(const struct sshkey *key, struct sshbuf *b, |
100 | | enum sshkey_serialize_rep opts) |
101 | 0 | { |
102 | 0 | int r; |
103 | |
|
104 | 0 | if (!sshkey_is_cert(key)) { |
105 | 0 | if ((r = sshkey_ecdsa_funcs.serialize_public(key, |
106 | 0 | b, opts)) != 0) |
107 | 0 | return r; |
108 | 0 | } |
109 | 0 | if ((r = sshkey_serialize_private_sk(key, b)) != 0) |
110 | 0 | return r; |
111 | | |
112 | 0 | return 0; |
113 | 0 | } |
114 | | |
115 | | static int |
116 | | ssh_ecdsa_sk_copy_public(const struct sshkey *from, struct sshkey *to) |
117 | 0 | { |
118 | 0 | int r; |
119 | |
|
120 | 0 | if ((r = sshkey_ecdsa_funcs.copy_public(from, to)) != 0) |
121 | 0 | return r; |
122 | 0 | if ((r = sshkey_copy_public_sk(from, to)) != 0) |
123 | 0 | return r; |
124 | 0 | return 0; |
125 | 0 | } |
126 | | |
127 | | static int |
128 | | ssh_ecdsa_sk_deserialize_public(const char *ktype, struct sshbuf *b, |
129 | | struct sshkey *key) |
130 | 6 | { |
131 | 6 | int r; |
132 | | |
133 | 6 | if ((r = sshkey_ecdsa_funcs.deserialize_public(ktype, b, key)) != 0) |
134 | 6 | return r; |
135 | 0 | if ((r = sshkey_deserialize_sk(b, key)) != 0) |
136 | 0 | return r; |
137 | 0 | return 0; |
138 | 0 | } |
139 | | |
140 | | static int |
141 | | ssh_ecdsa_sk_deserialize_private(const char *ktype, struct sshbuf *b, |
142 | | struct sshkey *key) |
143 | 0 | { |
144 | 0 | int r; |
145 | |
|
146 | 0 | if (!sshkey_is_cert(key)) { |
147 | 0 | if ((r = sshkey_ecdsa_funcs.deserialize_public(ktype, |
148 | 0 | b, key)) != 0) |
149 | 0 | return r; |
150 | 0 | } |
151 | 0 | if ((r = sshkey_private_deserialize_sk(b, key)) != 0) |
152 | 0 | return r; |
153 | | |
154 | 0 | return 0; |
155 | 0 | } |
156 | | |
157 | | /* |
158 | | * Check FIDO/W3C webauthn signatures clientData field against the expected |
159 | | * format and prepare a hash of it for use in signature verification. |
160 | | * |
161 | | * webauthn signatures do not sign the hash of the message directly, but |
162 | | * instead sign a JSON-like "clientData" wrapper structure that contains the |
163 | | * message hash along with a other information. |
164 | | * |
165 | | * Fortunately this structure has a fixed format so it is possible to verify |
166 | | * that the hash of the signed message is present within the clientData |
167 | | * structure without needing to implement any JSON parsing. |
168 | | */ |
169 | | static int |
170 | | webauthn_check_prepare_hash(const u_char *data, size_t datalen, |
171 | | const char *origin, const struct sshbuf *wrapper, |
172 | | uint8_t flags, const struct sshbuf *extensions, |
173 | | u_char *msghash, size_t msghashlen) |
174 | 0 | { |
175 | 0 | int r = SSH_ERR_INTERNAL_ERROR; |
176 | 0 | struct sshbuf *chall = NULL, *m = NULL; |
177 | |
|
178 | 0 | if ((m = sshbuf_new()) == NULL || |
179 | 0 | (chall = sshbuf_from(data, datalen)) == NULL) { |
180 | 0 | r = SSH_ERR_ALLOC_FAIL; |
181 | 0 | goto out; |
182 | 0 | } |
183 | | /* |
184 | | * Ensure origin contains no quote character and that the flags are |
185 | | * consistent with what we received |
186 | | */ |
187 | 0 | if (strchr(origin, '\"') != NULL || |
188 | 0 | (flags & 0x40) != 0 /* AD */ || |
189 | 0 | ((flags & 0x80) == 0 /* ED */) != (sshbuf_len(extensions) == 0)) { |
190 | 0 | r = SSH_ERR_INVALID_FORMAT; |
191 | 0 | goto out; |
192 | 0 | } |
193 | | |
194 | | /* |
195 | | * Prepare the preamble to clientData that we expect, poking the |
196 | | * challenge and origin into their canonical positions in the |
197 | | * structure. The crossOrigin flag and any additional extension |
198 | | * fields present are ignored. |
199 | | */ |
200 | 0 | #define WEBAUTHN_0 "{\"type\":\"webauthn.get\",\"challenge\":\"" |
201 | 0 | #define WEBAUTHN_1 "\",\"origin\":\"" |
202 | 0 | #define WEBAUTHN_2 "\"" |
203 | 0 | if ((r = sshbuf_put(m, WEBAUTHN_0, sizeof(WEBAUTHN_0) - 1)) != 0 || |
204 | 0 | (r = sshbuf_dtourlb64(chall, m, 0)) != 0 || |
205 | 0 | (r = sshbuf_put(m, WEBAUTHN_1, sizeof(WEBAUTHN_1) - 1)) != 0 || |
206 | 0 | (r = sshbuf_put(m, origin, strlen(origin))) != 0 || |
207 | 0 | (r = sshbuf_put(m, WEBAUTHN_2, sizeof(WEBAUTHN_2) - 1)) != 0) |
208 | 0 | goto out; |
209 | | #ifdef DEBUG_SK |
210 | | fprintf(stderr, "%s: received origin: %s\n", __func__, origin); |
211 | | fprintf(stderr, "%s: received clientData:\n", __func__); |
212 | | sshbuf_dump(wrapper, stderr); |
213 | | fprintf(stderr, "%s: expected clientData premable:\n", __func__); |
214 | | sshbuf_dump(m, stderr); |
215 | | #endif |
216 | | /* Check that the supplied clientData has the preamble we expect */ |
217 | 0 | if ((r = sshbuf_cmp(wrapper, 0, sshbuf_ptr(m), sshbuf_len(m))) != 0) |
218 | 0 | goto out; |
219 | | |
220 | | /* Prepare hash of clientData */ |
221 | 0 | if ((r = ssh_digest_buffer(SSH_DIGEST_SHA256, wrapper, |
222 | 0 | msghash, msghashlen)) != 0) |
223 | 0 | goto out; |
224 | | |
225 | | /* success */ |
226 | 0 | r = 0; |
227 | 0 | out: |
228 | 0 | sshbuf_free(chall); |
229 | 0 | sshbuf_free(m); |
230 | 0 | return r; |
231 | 0 | } |
232 | | |
233 | | static int |
234 | | ssh_ecdsa_sk_verify(const struct sshkey *key, |
235 | | const u_char *sig, size_t siglen, |
236 | | const u_char *data, size_t dlen, const char *alg, u_int compat, |
237 | | struct sshkey_sig_details **detailsp) |
238 | 0 | { |
239 | 0 | ECDSA_SIG *esig = NULL; |
240 | 0 | BIGNUM *sig_r = NULL, *sig_s = NULL; |
241 | 0 | u_char sig_flags; |
242 | 0 | u_char msghash[32], apphash[32], sighash[32]; |
243 | 0 | u_int sig_counter; |
244 | 0 | int is_webauthn = 0, ret = SSH_ERR_INTERNAL_ERROR; |
245 | 0 | struct sshbuf *b = NULL, *sigbuf = NULL, *original_signed = NULL; |
246 | 0 | struct sshbuf *webauthn_wrapper = NULL, *webauthn_exts = NULL; |
247 | 0 | char *ktype = NULL, *webauthn_origin = NULL; |
248 | 0 | struct sshkey_sig_details *details = NULL; |
249 | | #ifdef DEBUG_SK |
250 | | char *tmp = NULL; |
251 | | #endif |
252 | |
|
253 | 0 | if (detailsp != NULL) |
254 | 0 | *detailsp = NULL; |
255 | 0 | if (key == NULL || key->ecdsa == NULL || |
256 | 0 | sshkey_type_plain(key->type) != KEY_ECDSA_SK || |
257 | 0 | sig == NULL || siglen == 0) |
258 | 0 | return SSH_ERR_INVALID_ARGUMENT; |
259 | | |
260 | 0 | if (key->ecdsa_nid != NID_X9_62_prime256v1) |
261 | 0 | return SSH_ERR_INTERNAL_ERROR; |
262 | | |
263 | | /* fetch signature */ |
264 | 0 | if ((b = sshbuf_from(sig, siglen)) == NULL) |
265 | 0 | return SSH_ERR_ALLOC_FAIL; |
266 | 0 | if ((details = calloc(1, sizeof(*details))) == NULL) { |
267 | 0 | ret = SSH_ERR_ALLOC_FAIL; |
268 | 0 | goto out; |
269 | 0 | } |
270 | 0 | if (sshbuf_get_cstring(b, &ktype, NULL) != 0) { |
271 | 0 | ret = SSH_ERR_INVALID_FORMAT; |
272 | 0 | goto out; |
273 | 0 | } |
274 | 0 | if (strcmp(ktype, "webauthn-sk-ecdsa-sha2-nistp256@openssh.com") == 0) |
275 | 0 | is_webauthn = 1; |
276 | 0 | else if (strcmp(ktype, "sk-ecdsa-sha2-nistp256@openssh.com") != 0) { |
277 | 0 | ret = SSH_ERR_INVALID_FORMAT; |
278 | 0 | goto out; |
279 | 0 | } |
280 | 0 | if (sshbuf_froms(b, &sigbuf) != 0 || |
281 | 0 | sshbuf_get_u8(b, &sig_flags) != 0 || |
282 | 0 | sshbuf_get_u32(b, &sig_counter) != 0) { |
283 | 0 | ret = SSH_ERR_INVALID_FORMAT; |
284 | 0 | goto out; |
285 | 0 | } |
286 | 0 | if (is_webauthn) { |
287 | 0 | if (sshbuf_get_cstring(b, &webauthn_origin, NULL) != 0 || |
288 | 0 | sshbuf_froms(b, &webauthn_wrapper) != 0 || |
289 | 0 | sshbuf_froms(b, &webauthn_exts) != 0) { |
290 | 0 | ret = SSH_ERR_INVALID_FORMAT; |
291 | 0 | goto out; |
292 | 0 | } |
293 | 0 | } |
294 | 0 | if (sshbuf_len(b) != 0) { |
295 | 0 | ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; |
296 | 0 | goto out; |
297 | 0 | } |
298 | | |
299 | | /* parse signature */ |
300 | 0 | if (sshbuf_get_bignum2(sigbuf, &sig_r) != 0 || |
301 | 0 | sshbuf_get_bignum2(sigbuf, &sig_s) != 0) { |
302 | 0 | ret = SSH_ERR_INVALID_FORMAT; |
303 | 0 | goto out; |
304 | 0 | } |
305 | 0 | if (sshbuf_len(sigbuf) != 0) { |
306 | 0 | ret = SSH_ERR_UNEXPECTED_TRAILING_DATA; |
307 | 0 | goto out; |
308 | 0 | } |
309 | | |
310 | | #ifdef DEBUG_SK |
311 | | fprintf(stderr, "%s: data: (len %zu)\n", __func__, datalen); |
312 | | /* sshbuf_dump_data(data, datalen, stderr); */ |
313 | | fprintf(stderr, "%s: sig_r: %s\n", __func__, (tmp = BN_bn2hex(sig_r))); |
314 | | free(tmp); |
315 | | fprintf(stderr, "%s: sig_s: %s\n", __func__, (tmp = BN_bn2hex(sig_s))); |
316 | | free(tmp); |
317 | | fprintf(stderr, "%s: sig_flags = 0x%02x, sig_counter = %u\n", |
318 | | __func__, sig_flags, sig_counter); |
319 | | if (is_webauthn) { |
320 | | fprintf(stderr, "%s: webauthn origin: %s\n", __func__, |
321 | | webauthn_origin); |
322 | | fprintf(stderr, "%s: webauthn_wrapper:\n", __func__); |
323 | | sshbuf_dump(webauthn_wrapper, stderr); |
324 | | } |
325 | | #endif |
326 | 0 | if ((esig = ECDSA_SIG_new()) == NULL) { |
327 | 0 | ret = SSH_ERR_ALLOC_FAIL; |
328 | 0 | goto out; |
329 | 0 | } |
330 | 0 | if (!ECDSA_SIG_set0(esig, sig_r, sig_s)) { |
331 | 0 | ret = SSH_ERR_LIBCRYPTO_ERROR; |
332 | 0 | goto out; |
333 | 0 | } |
334 | 0 | sig_r = sig_s = NULL; /* transferred */ |
335 | | |
336 | | /* Reconstruct data that was supposedly signed */ |
337 | 0 | if ((original_signed = sshbuf_new()) == NULL) { |
338 | 0 | ret = SSH_ERR_ALLOC_FAIL; |
339 | 0 | goto out; |
340 | 0 | } |
341 | 0 | if (is_webauthn) { |
342 | 0 | if ((ret = webauthn_check_prepare_hash(data, dlen, |
343 | 0 | webauthn_origin, webauthn_wrapper, sig_flags, webauthn_exts, |
344 | 0 | msghash, sizeof(msghash))) != 0) |
345 | 0 | goto out; |
346 | 0 | } else if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, data, dlen, |
347 | 0 | msghash, sizeof(msghash))) != 0) |
348 | 0 | goto out; |
349 | | /* Application value is hashed before signature */ |
350 | 0 | if ((ret = ssh_digest_memory(SSH_DIGEST_SHA256, key->sk_application, |
351 | 0 | strlen(key->sk_application), apphash, sizeof(apphash))) != 0) |
352 | 0 | goto out; |
353 | | #ifdef DEBUG_SK |
354 | | fprintf(stderr, "%s: hashed application:\n", __func__); |
355 | | sshbuf_dump_data(apphash, sizeof(apphash), stderr); |
356 | | fprintf(stderr, "%s: hashed message:\n", __func__); |
357 | | sshbuf_dump_data(msghash, sizeof(msghash), stderr); |
358 | | #endif |
359 | 0 | if ((ret = sshbuf_put(original_signed, |
360 | 0 | apphash, sizeof(apphash))) != 0 || |
361 | 0 | (ret = sshbuf_put_u8(original_signed, sig_flags)) != 0 || |
362 | 0 | (ret = sshbuf_put_u32(original_signed, sig_counter)) != 0 || |
363 | 0 | (ret = sshbuf_putb(original_signed, webauthn_exts)) != 0 || |
364 | 0 | (ret = sshbuf_put(original_signed, msghash, sizeof(msghash))) != 0) |
365 | 0 | goto out; |
366 | | /* Signature is over H(original_signed) */ |
367 | 0 | if ((ret = ssh_digest_buffer(SSH_DIGEST_SHA256, original_signed, |
368 | 0 | sighash, sizeof(sighash))) != 0) |
369 | 0 | goto out; |
370 | 0 | details->sk_counter = sig_counter; |
371 | 0 | details->sk_flags = sig_flags; |
372 | | #ifdef DEBUG_SK |
373 | | fprintf(stderr, "%s: signed buf:\n", __func__); |
374 | | sshbuf_dump(original_signed, stderr); |
375 | | fprintf(stderr, "%s: signed hash:\n", __func__); |
376 | | sshbuf_dump_data(sighash, sizeof(sighash), stderr); |
377 | | #endif |
378 | | |
379 | | /* Verify it */ |
380 | 0 | switch (ECDSA_do_verify(sighash, sizeof(sighash), esig, key->ecdsa)) { |
381 | 0 | case 1: |
382 | 0 | ret = 0; |
383 | 0 | break; |
384 | 0 | case 0: |
385 | 0 | ret = SSH_ERR_SIGNATURE_INVALID; |
386 | 0 | goto out; |
387 | 0 | default: |
388 | 0 | ret = SSH_ERR_LIBCRYPTO_ERROR; |
389 | 0 | goto out; |
390 | 0 | } |
391 | | /* success */ |
392 | 0 | if (detailsp != NULL) { |
393 | 0 | *detailsp = details; |
394 | 0 | details = NULL; |
395 | 0 | } |
396 | 0 | out: |
397 | 0 | explicit_bzero(&sig_flags, sizeof(sig_flags)); |
398 | 0 | explicit_bzero(&sig_counter, sizeof(sig_counter)); |
399 | 0 | explicit_bzero(msghash, sizeof(msghash)); |
400 | 0 | explicit_bzero(sighash, sizeof(msghash)); |
401 | 0 | explicit_bzero(apphash, sizeof(apphash)); |
402 | 0 | sshkey_sig_details_free(details); |
403 | 0 | sshbuf_free(webauthn_wrapper); |
404 | 0 | sshbuf_free(webauthn_exts); |
405 | 0 | free(webauthn_origin); |
406 | 0 | sshbuf_free(original_signed); |
407 | 0 | sshbuf_free(sigbuf); |
408 | 0 | sshbuf_free(b); |
409 | 0 | ECDSA_SIG_free(esig); |
410 | 0 | BN_clear_free(sig_r); |
411 | 0 | BN_clear_free(sig_s); |
412 | 0 | free(ktype); |
413 | 0 | return ret; |
414 | 0 | } |
415 | | |
416 | | static const struct sshkey_impl_funcs sshkey_ecdsa_sk_funcs = { |
417 | | /* .size = */ NULL, |
418 | | /* .alloc = */ NULL, |
419 | | /* .cleanup = */ ssh_ecdsa_sk_cleanup, |
420 | | /* .equal = */ ssh_ecdsa_sk_equal, |
421 | | /* .ssh_serialize_public = */ ssh_ecdsa_sk_serialize_public, |
422 | | /* .ssh_deserialize_public = */ ssh_ecdsa_sk_deserialize_public, |
423 | | /* .ssh_serialize_private = */ ssh_ecdsa_sk_serialize_private, |
424 | | /* .ssh_deserialize_private = */ ssh_ecdsa_sk_deserialize_private, |
425 | | /* .generate = */ NULL, |
426 | | /* .copy_public = */ ssh_ecdsa_sk_copy_public, |
427 | | /* .sign = */ NULL, |
428 | | /* .verify = */ ssh_ecdsa_sk_verify, |
429 | | }; |
430 | | |
431 | | const struct sshkey_impl sshkey_ecdsa_sk_impl = { |
432 | | /* .name = */ "sk-ecdsa-sha2-nistp256@openssh.com", |
433 | | /* .shortname = */ "ECDSA-SK", |
434 | | /* .sigalg = */ NULL, |
435 | | /* .type = */ KEY_ECDSA_SK, |
436 | | /* .nid = */ NID_X9_62_prime256v1, |
437 | | /* .cert = */ 0, |
438 | | /* .sigonly = */ 0, |
439 | | /* .keybits = */ 256, |
440 | | /* .funcs = */ &sshkey_ecdsa_sk_funcs, |
441 | | }; |
442 | | |
443 | | const struct sshkey_impl sshkey_ecdsa_sk_cert_impl = { |
444 | | /* .name = */ "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com", |
445 | | /* .shortname = */ "ECDSA-SK-CERT", |
446 | | /* .sigalg = */ NULL, |
447 | | /* .type = */ KEY_ECDSA_SK_CERT, |
448 | | /* .nid = */ NID_X9_62_prime256v1, |
449 | | /* .cert = */ 1, |
450 | | /* .sigonly = */ 0, |
451 | | /* .keybits = */ 256, |
452 | | /* .funcs = */ &sshkey_ecdsa_sk_funcs, |
453 | | }; |
454 | | |
455 | | const struct sshkey_impl sshkey_ecdsa_sk_webauthn_impl = { |
456 | | /* .name = */ "webauthn-sk-ecdsa-sha2-nistp256@openssh.com", |
457 | | /* .shortname = */ "ECDSA-SK", |
458 | | /* .sigalg = */ NULL, |
459 | | /* .type = */ KEY_ECDSA_SK, |
460 | | /* .nid = */ NID_X9_62_prime256v1, |
461 | | /* .cert = */ 0, |
462 | | /* .sigonly = */ 1, |
463 | | /* .keybits = */ 256, |
464 | | /* .funcs = */ &sshkey_ecdsa_sk_funcs, |
465 | | }; |
466 | | |
467 | | #endif /* OPENSSL_HAS_ECC */ |