1 /* $OpenBSD: ssh-rsa.c,v 1.80 2024/08/15 00:51:51 djm Exp $ */
2 /*
3 * Copyright (c) 2000, 2003 Markus Friedl <markus@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include "includes.h"
19
20 #ifdef WITH_OPENSSL
21
22 #include <sys/types.h>
23
24 #include <openssl/evp.h>
25 #include <openssl/err.h>
26
27 #include <stdarg.h>
28 #include <string.h>
29
30 #include "sshbuf.h"
31 #include "ssherr.h"
32 #define SSHKEY_INTERNAL
33 #include "sshkey.h"
34 #include "digest.h"
35 #include "log.h"
36
37 #include "openbsd-compat/openssl-compat.h"
38
39 static u_int
ssh_rsa_size(const struct sshkey * k)40 ssh_rsa_size(const struct sshkey *k)
41 {
42 if (k->pkey == NULL)
43 return 0;
44 return EVP_PKEY_bits(k->pkey);
45 }
46
47 static int
ssh_rsa_alloc(struct sshkey * k)48 ssh_rsa_alloc(struct sshkey *k)
49 {
50 if ((k->pkey = EVP_PKEY_new()) == NULL)
51 return SSH_ERR_ALLOC_FAIL;
52 return 0;
53 }
54
55 static void
ssh_rsa_cleanup(struct sshkey * k)56 ssh_rsa_cleanup(struct sshkey *k)
57 {
58 EVP_PKEY_free(k->pkey);
59 k->pkey = NULL;
60 }
61
62 static int
ssh_rsa_equal(const struct sshkey * a,const struct sshkey * b)63 ssh_rsa_equal(const struct sshkey *a, const struct sshkey *b)
64 {
65 if (a->pkey == NULL || b->pkey == NULL)
66 return 0;
67 return EVP_PKEY_cmp(a->pkey, b->pkey) == 1;
68 }
69
70 static int
ssh_rsa_serialize_public(const struct sshkey * key,struct sshbuf * b,enum sshkey_serialize_rep opts)71 ssh_rsa_serialize_public(const struct sshkey *key, struct sshbuf *b,
72 enum sshkey_serialize_rep opts)
73 {
74 int r;
75 const BIGNUM *rsa_n, *rsa_e;
76 const RSA *rsa;
77
78 if (key->pkey == NULL)
79 return SSH_ERR_INVALID_ARGUMENT;
80 if ((rsa = EVP_PKEY_get0_RSA(key->pkey)) == NULL)
81 return SSH_ERR_LIBCRYPTO_ERROR;
82
83 RSA_get0_key(rsa, &rsa_n, &rsa_e, NULL);
84 if ((r = sshbuf_put_bignum2(b, rsa_e)) != 0 ||
85 (r = sshbuf_put_bignum2(b, rsa_n)) != 0)
86 return r;
87
88 return 0;
89 }
90
91 static int
ssh_rsa_serialize_private(const struct sshkey * key,struct sshbuf * b,enum sshkey_serialize_rep opts)92 ssh_rsa_serialize_private(const struct sshkey *key, struct sshbuf *b,
93 enum sshkey_serialize_rep opts)
94 {
95 int r;
96 const BIGNUM *rsa_n, *rsa_e, *rsa_d, *rsa_iqmp, *rsa_p, *rsa_q;
97 const RSA *rsa;
98
99 if ((rsa = EVP_PKEY_get0_RSA(key->pkey)) == NULL)
100 return SSH_ERR_LIBCRYPTO_ERROR;
101 RSA_get0_key(rsa, &rsa_n, &rsa_e, &rsa_d);
102 RSA_get0_factors(rsa, &rsa_p, &rsa_q);
103 RSA_get0_crt_params(rsa, NULL, NULL, &rsa_iqmp);
104
105 if (!sshkey_is_cert(key)) {
106 /* Note: can't reuse ssh_rsa_serialize_public: e, n vs. n, e */
107 if ((r = sshbuf_put_bignum2(b, rsa_n)) != 0 ||
108 (r = sshbuf_put_bignum2(b, rsa_e)) != 0)
109 return r;
110 }
111 if ((r = sshbuf_put_bignum2(b, rsa_d)) != 0 ||
112 (r = sshbuf_put_bignum2(b, rsa_iqmp)) != 0 ||
113 (r = sshbuf_put_bignum2(b, rsa_p)) != 0 ||
114 (r = sshbuf_put_bignum2(b, rsa_q)) != 0)
115 return r;
116
117 return 0;
118 }
119
120 static int
ssh_rsa_generate(struct sshkey * k,int bits)121 ssh_rsa_generate(struct sshkey *k, int bits)
122 {
123 EVP_PKEY_CTX *ctx = NULL;
124 EVP_PKEY *res = NULL;
125
126 int ret = SSH_ERR_INTERNAL_ERROR;
127
128 if (bits < SSH_RSA_MINIMUM_MODULUS_SIZE ||
129 bits > SSHBUF_MAX_BIGNUM * 8)
130 return SSH_ERR_KEY_LENGTH;
131
132 if ((ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL)) == NULL) {
133 ret = SSH_ERR_ALLOC_FAIL;
134 goto out;
135 }
136 if (EVP_PKEY_keygen_init(ctx) <= 0) {
137 ret = SSH_ERR_LIBCRYPTO_ERROR;
138 goto out;
139 }
140 if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, bits) <= 0) {
141 ret = SSH_ERR_KEY_LENGTH;
142 goto out;
143 }
144 if (EVP_PKEY_keygen(ctx, &res) <= 0 || res == NULL) {
145 ret = SSH_ERR_LIBCRYPTO_ERROR;
146 goto out;
147 }
148 /* success */
149 k->pkey = res;
150 ret = 0;
151 out:
152 EVP_PKEY_CTX_free(ctx);
153 return ret;
154 }
155
156 static int
ssh_rsa_copy_public(const struct sshkey * from,struct sshkey * to)157 ssh_rsa_copy_public(const struct sshkey *from, struct sshkey *to)
158 {
159 const BIGNUM *rsa_n, *rsa_e;
160 BIGNUM *rsa_n_dup = NULL, *rsa_e_dup = NULL;
161 int r = SSH_ERR_INTERNAL_ERROR;
162 const RSA *rsa_from;
163 RSA *rsa_to = NULL;
164
165 if ((rsa_from = EVP_PKEY_get0_RSA(from->pkey)) == NULL ||
166 (rsa_to = RSA_new()) == NULL)
167 return SSH_ERR_LIBCRYPTO_ERROR;
168
169 RSA_get0_key(rsa_from, &rsa_n, &rsa_e, NULL);
170 if ((rsa_n_dup = BN_dup(rsa_n)) == NULL ||
171 (rsa_e_dup = BN_dup(rsa_e)) == NULL) {
172 r = SSH_ERR_ALLOC_FAIL;
173 goto out;
174 }
175 if (!RSA_set0_key(rsa_to, rsa_n_dup, rsa_e_dup, NULL)) {
176 r = SSH_ERR_LIBCRYPTO_ERROR;
177 goto out;
178 }
179 rsa_n_dup = rsa_e_dup = NULL; /* transferred */
180
181 if (EVP_PKEY_set1_RSA(to->pkey, rsa_to) != 1) {
182 r = SSH_ERR_LIBCRYPTO_ERROR;
183 goto out;
184 }
185 /* success */
186 r = 0;
187 out:
188 RSA_free(rsa_to);
189 BN_clear_free(rsa_n_dup);
190 BN_clear_free(rsa_e_dup);
191 return r;
192 }
193
194 static int
ssh_rsa_deserialize_public(const char * ktype,struct sshbuf * b,struct sshkey * key)195 ssh_rsa_deserialize_public(const char *ktype, struct sshbuf *b,
196 struct sshkey *key)
197 {
198 int ret = SSH_ERR_INTERNAL_ERROR;
199 BIGNUM *rsa_n = NULL, *rsa_e = NULL;
200 RSA *rsa = NULL;
201
202 if ((rsa = RSA_new()) == NULL)
203 return SSH_ERR_LIBCRYPTO_ERROR;
204
205 if (sshbuf_get_bignum2(b, &rsa_e) != 0 ||
206 sshbuf_get_bignum2(b, &rsa_n) != 0) {
207 ret = SSH_ERR_INVALID_FORMAT;
208 goto out;
209 }
210 if (!RSA_set0_key(rsa, rsa_n, rsa_e, NULL)) {
211 ret = SSH_ERR_LIBCRYPTO_ERROR;
212 goto out;
213 }
214 rsa_n = rsa_e = NULL; /* transferred */
215 if (EVP_PKEY_set1_RSA(key->pkey, rsa) != 1) {
216 ret = SSH_ERR_LIBCRYPTO_ERROR;
217 goto out;
218 }
219 if ((ret = sshkey_check_rsa_length(key, 0)) != 0)
220 goto out;
221 #ifdef DEBUG_PK
222 RSA_print_fp(stderr, rsa, 8);
223 #endif
224 /* success */
225 ret = 0;
226 out:
227 RSA_free(rsa);
228 BN_clear_free(rsa_n);
229 BN_clear_free(rsa_e);
230 return ret;
231 }
232
233 static int
ssh_rsa_deserialize_private(const char * ktype,struct sshbuf * b,struct sshkey * key)234 ssh_rsa_deserialize_private(const char *ktype, struct sshbuf *b,
235 struct sshkey *key)
236 {
237 int r;
238 BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
239 BIGNUM *rsa_iqmp = NULL, *rsa_p = NULL, *rsa_q = NULL;
240 BIGNUM *rsa_dmp1 = NULL, *rsa_dmq1 = NULL;
241 RSA *rsa = NULL;
242
243 if (sshkey_is_cert(key)) {
244 /* sshkey_private_deserialize already has pubkey from cert */
245 if ((rsa = EVP_PKEY_get1_RSA(key->pkey)) == NULL) {
246 r = SSH_ERR_LIBCRYPTO_ERROR;
247 goto out;
248 }
249 } else {
250 if ((rsa = RSA_new()) == NULL) {
251 r = SSH_ERR_LIBCRYPTO_ERROR;
252 goto out;
253 }
254 /* Note: can't reuse ssh_rsa_deserialize_public: e,n vs. n,e */
255 if ((r = sshbuf_get_bignum2(b, &rsa_n)) != 0 ||
256 (r = sshbuf_get_bignum2(b, &rsa_e)) != 0)
257 goto out;
258 if (!RSA_set0_key(rsa, rsa_n, rsa_e, NULL)) {
259 r = SSH_ERR_LIBCRYPTO_ERROR;
260 goto out;
261 }
262 rsa_n = rsa_e = NULL; /* transferred */
263 }
264 if ((r = sshbuf_get_bignum2(b, &rsa_d)) != 0 ||
265 (r = sshbuf_get_bignum2(b, &rsa_iqmp)) != 0 ||
266 (r = sshbuf_get_bignum2(b, &rsa_p)) != 0 ||
267 (r = sshbuf_get_bignum2(b, &rsa_q)) != 0)
268 goto out;
269 if ((r = ssh_rsa_complete_crt_parameters(rsa_d, rsa_p, rsa_q,
270 rsa_iqmp, &rsa_dmp1, &rsa_dmq1)) != 0)
271 goto out;
272 if (!RSA_set0_key(rsa, NULL, NULL, rsa_d)) {
273 r = SSH_ERR_LIBCRYPTO_ERROR;
274 goto out;
275 }
276 rsa_d = NULL; /* transferred */
277 if (!RSA_set0_factors(rsa, rsa_p, rsa_q)) {
278 r = SSH_ERR_LIBCRYPTO_ERROR;
279 goto out;
280 }
281 rsa_p = rsa_q = NULL; /* transferred */
282 if (!RSA_set0_crt_params(rsa, rsa_dmp1, rsa_dmq1, rsa_iqmp)) {
283 r = SSH_ERR_LIBCRYPTO_ERROR;
284 goto out;
285 }
286 rsa_dmp1 = rsa_dmq1 = rsa_iqmp = NULL;
287 if (RSA_blinding_on(rsa, NULL) != 1) {
288 r = SSH_ERR_LIBCRYPTO_ERROR;
289 goto out;
290 }
291 if (EVP_PKEY_set1_RSA(key->pkey, rsa) != 1) {
292 r = SSH_ERR_LIBCRYPTO_ERROR;
293 goto out;
294 }
295 if ((r = sshkey_check_rsa_length(key, 0)) != 0)
296 goto out;
297 /* success */
298 r = 0;
299 out:
300 RSA_free(rsa);
301 BN_clear_free(rsa_n);
302 BN_clear_free(rsa_e);
303 BN_clear_free(rsa_d);
304 BN_clear_free(rsa_p);
305 BN_clear_free(rsa_q);
306 BN_clear_free(rsa_iqmp);
307 BN_clear_free(rsa_dmp1);
308 BN_clear_free(rsa_dmq1);
309 return r;
310 }
311
312 static const char *
rsa_hash_alg_ident(int hash_alg)313 rsa_hash_alg_ident(int hash_alg)
314 {
315 switch (hash_alg) {
316 case SSH_DIGEST_SHA1:
317 return "ssh-rsa";
318 case SSH_DIGEST_SHA256:
319 return "rsa-sha2-256";
320 case SSH_DIGEST_SHA512:
321 return "rsa-sha2-512";
322 }
323 return NULL;
324 }
325
326 /*
327 * Returns the hash algorithm ID for a given algorithm identifier as used
328 * inside the signature blob,
329 */
330 static int
rsa_hash_id_from_ident(const char * ident)331 rsa_hash_id_from_ident(const char *ident)
332 {
333 if (strcmp(ident, "ssh-rsa") == 0)
334 return SSH_DIGEST_SHA1;
335 if (strcmp(ident, "rsa-sha2-256") == 0)
336 return SSH_DIGEST_SHA256;
337 if (strcmp(ident, "rsa-sha2-512") == 0)
338 return SSH_DIGEST_SHA512;
339 return -1;
340 }
341
342 /*
343 * Return the hash algorithm ID for the specified key name. This includes
344 * all the cases of rsa_hash_id_from_ident() but also the certificate key
345 * types.
346 */
347 static int
rsa_hash_id_from_keyname(const char * alg)348 rsa_hash_id_from_keyname(const char *alg)
349 {
350 int r;
351
352 if ((r = rsa_hash_id_from_ident(alg)) != -1)
353 return r;
354 if (strcmp(alg, "ssh-rsa-cert-v01@openssh.com") == 0)
355 return SSH_DIGEST_SHA1;
356 if (strcmp(alg, "rsa-sha2-256-cert-v01@openssh.com") == 0)
357 return SSH_DIGEST_SHA256;
358 if (strcmp(alg, "rsa-sha2-512-cert-v01@openssh.com") == 0)
359 return SSH_DIGEST_SHA512;
360 return -1;
361 }
362
363 int
ssh_rsa_complete_crt_parameters(const BIGNUM * rsa_d,const BIGNUM * rsa_p,const BIGNUM * rsa_q,const BIGNUM * rsa_iqmp,BIGNUM ** rsa_dmp1,BIGNUM ** rsa_dmq1)364 ssh_rsa_complete_crt_parameters(const BIGNUM *rsa_d, const BIGNUM *rsa_p,
365 const BIGNUM *rsa_q, const BIGNUM *rsa_iqmp, BIGNUM **rsa_dmp1,
366 BIGNUM **rsa_dmq1)
367 {
368 BIGNUM *aux = NULL, *d_consttime = NULL;
369 BN_CTX *ctx = NULL;
370 int r;
371
372 *rsa_dmq1 = *rsa_dmp1 = NULL;
373 if ((ctx = BN_CTX_new()) == NULL)
374 return SSH_ERR_ALLOC_FAIL;
375 if ((aux = BN_new()) == NULL ||
376 (*rsa_dmq1 = BN_new()) == NULL ||
377 (*rsa_dmp1 = BN_new()) == NULL)
378 return SSH_ERR_ALLOC_FAIL;
379 if ((d_consttime = BN_dup(rsa_d)) == NULL) {
380 r = SSH_ERR_ALLOC_FAIL;
381 goto out;
382 }
383 BN_set_flags(aux, BN_FLG_CONSTTIME);
384 BN_set_flags(d_consttime, BN_FLG_CONSTTIME);
385
386 if ((BN_sub(aux, rsa_q, BN_value_one()) == 0) ||
387 (BN_mod(*rsa_dmq1, d_consttime, aux, ctx) == 0) ||
388 (BN_sub(aux, rsa_p, BN_value_one()) == 0) ||
389 (BN_mod(*rsa_dmp1, d_consttime, aux, ctx) == 0)) {
390 r = SSH_ERR_LIBCRYPTO_ERROR;
391 goto out;
392 }
393 /* success */
394 r = 0;
395 out:
396 BN_clear_free(aux);
397 BN_clear_free(d_consttime);
398 BN_CTX_free(ctx);
399 return r;
400 }
401
402 /* RSASSA-PKCS1-v1_5 (PKCS #1 v2.0 signature) with SHA1 */
403 static int
ssh_rsa_sign(struct sshkey * key,u_char ** sigp,size_t * lenp,const u_char * data,size_t datalen,const char * alg,const char * sk_provider,const char * sk_pin,u_int compat)404 ssh_rsa_sign(struct sshkey *key,
405 u_char **sigp, size_t *lenp,
406 const u_char *data, size_t datalen,
407 const char *alg, const char *sk_provider, const char *sk_pin, u_int compat)
408 {
409 u_char *sig = NULL;
410 size_t diff, len = 0;
411 int slen = 0;
412 int hash_alg, ret = SSH_ERR_INTERNAL_ERROR;
413 struct sshbuf *b = NULL;
414
415 if (lenp != NULL)
416 *lenp = 0;
417 if (sigp != NULL)
418 *sigp = NULL;
419
420 if (alg == NULL || strlen(alg) == 0)
421 hash_alg = SSH_DIGEST_SHA1;
422 else
423 hash_alg = rsa_hash_id_from_keyname(alg);
424
425 if (key == NULL || key->pkey == NULL || hash_alg == -1 ||
426 sshkey_type_plain(key->type) != KEY_RSA)
427 return SSH_ERR_INVALID_ARGUMENT;
428 slen = EVP_PKEY_size(key->pkey);
429 if (slen <= 0 || slen > SSHBUF_MAX_BIGNUM)
430 return SSH_ERR_INVALID_ARGUMENT;
431 if (EVP_PKEY_bits(key->pkey) < SSH_RSA_MINIMUM_MODULUS_SIZE)
432 return SSH_ERR_KEY_LENGTH;
433
434 if ((ret = sshkey_pkey_digest_sign(key->pkey, hash_alg, &sig, &len,
435 data, datalen)) < 0)
436 goto out;
437 if (len < (size_t)slen) {
438 diff = slen - len;
439 memmove(sig + diff, sig, len);
440 explicit_bzero(sig, diff);
441 } else if (len > (size_t)slen) {
442 ret = SSH_ERR_INTERNAL_ERROR;
443 goto out;
444 }
445
446 /* encode signature */
447 if ((b = sshbuf_new()) == NULL) {
448 ret = SSH_ERR_ALLOC_FAIL;
449 goto out;
450 }
451 if ((ret = sshbuf_put_cstring(b, rsa_hash_alg_ident(hash_alg))) != 0 ||
452 (ret = sshbuf_put_string(b, sig, slen)) != 0)
453 goto out;
454 len = sshbuf_len(b);
455 if (sigp != NULL) {
456 if ((*sigp = malloc(len)) == NULL) {
457 ret = SSH_ERR_ALLOC_FAIL;
458 goto out;
459 }
460 memcpy(*sigp, sshbuf_ptr(b), len);
461 }
462 if (lenp != NULL)
463 *lenp = len;
464 ret = 0;
465 out:
466 freezero(sig, slen);
467 sshbuf_free(b);
468 return ret;
469 }
470
471 static int
ssh_rsa_verify(const struct sshkey * key,const u_char * sig,size_t siglen,const u_char * data,size_t dlen,const char * alg,u_int compat,struct sshkey_sig_details ** detailsp)472 ssh_rsa_verify(const struct sshkey *key,
473 const u_char *sig, size_t siglen,
474 const u_char *data, size_t dlen, const char *alg, u_int compat,
475 struct sshkey_sig_details **detailsp)
476 {
477 char *sigtype = NULL;
478 int hash_alg, want_alg, ret = SSH_ERR_INTERNAL_ERROR;
479 size_t len = 0, diff, modlen, rsasize;
480 struct sshbuf *b = NULL;
481 u_char digest[SSH_DIGEST_MAX_LENGTH], *osigblob, *sigblob = NULL;
482
483 if (key == NULL || key->pkey == NULL ||
484 sshkey_type_plain(key->type) != KEY_RSA ||
485 sig == NULL || siglen == 0)
486 return SSH_ERR_INVALID_ARGUMENT;
487 if (EVP_PKEY_bits(key->pkey) < SSH_RSA_MINIMUM_MODULUS_SIZE)
488 return SSH_ERR_KEY_LENGTH;
489
490 if ((b = sshbuf_from(sig, siglen)) == NULL)
491 return SSH_ERR_ALLOC_FAIL;
492 if (sshbuf_get_cstring(b, &sigtype, NULL) != 0) {
493 ret = SSH_ERR_INVALID_FORMAT;
494 goto out;
495 }
496 if ((hash_alg = rsa_hash_id_from_ident(sigtype)) == -1) {
497 ret = SSH_ERR_KEY_TYPE_MISMATCH;
498 goto out;
499 }
500 /*
501 * Allow ssh-rsa-cert-v01 certs to generate SHA2 signatures for
502 * legacy reasons, but otherwise the signature type should match.
503 */
504 if (alg != NULL && strcmp(alg, "ssh-rsa-cert-v01@openssh.com") != 0) {
505 if ((want_alg = rsa_hash_id_from_keyname(alg)) == -1) {
506 ret = SSH_ERR_INVALID_ARGUMENT;
507 goto out;
508 }
509 if (hash_alg != want_alg) {
510 ret = SSH_ERR_SIGNATURE_INVALID;
511 goto out;
512 }
513 }
514 if (sshbuf_get_string(b, &sigblob, &len) != 0) {
515 ret = SSH_ERR_INVALID_FORMAT;
516 goto out;
517 }
518 if (sshbuf_len(b) != 0) {
519 ret = SSH_ERR_UNEXPECTED_TRAILING_DATA;
520 goto out;
521 }
522 /* RSA_verify expects a signature of RSA_size */
523 modlen = EVP_PKEY_size(key->pkey);
524 if (len > modlen) {
525 ret = SSH_ERR_KEY_BITS_MISMATCH;
526 goto out;
527 } else if (len < modlen) {
528 diff = modlen - len;
529 osigblob = sigblob;
530 if ((sigblob = realloc(sigblob, modlen)) == NULL) {
531 sigblob = osigblob; /* put it back for clear/free */
532 ret = SSH_ERR_ALLOC_FAIL;
533 goto out;
534 }
535 memmove(sigblob + diff, sigblob, len);
536 explicit_bzero(sigblob, diff);
537 len = modlen;
538 }
539
540 rsasize = EVP_PKEY_size(key->pkey);
541 if (rsasize <= 0 || rsasize > SSHBUF_MAX_BIGNUM ||
542 len == 0 || len > rsasize) {
543 ret = SSH_ERR_INVALID_ARGUMENT;
544 goto out;
545 }
546 ret = sshkey_pkey_digest_verify(key->pkey, hash_alg, data, dlen,
547 sigblob, len);
548
549 out:
550 freezero(sigblob, len);
551 free(sigtype);
552 sshbuf_free(b);
553 explicit_bzero(digest, sizeof(digest));
554 return ret;
555 }
556
557 static const struct sshkey_impl_funcs sshkey_rsa_funcs = {
558 /* .size = */ ssh_rsa_size,
559 /* .alloc = */ ssh_rsa_alloc,
560 /* .cleanup = */ ssh_rsa_cleanup,
561 /* .equal = */ ssh_rsa_equal,
562 /* .ssh_serialize_public = */ ssh_rsa_serialize_public,
563 /* .ssh_deserialize_public = */ ssh_rsa_deserialize_public,
564 /* .ssh_serialize_private = */ ssh_rsa_serialize_private,
565 /* .ssh_deserialize_private = */ ssh_rsa_deserialize_private,
566 /* .generate = */ ssh_rsa_generate,
567 /* .copy_public = */ ssh_rsa_copy_public,
568 /* .sign = */ ssh_rsa_sign,
569 /* .verify = */ ssh_rsa_verify,
570 };
571
572 const struct sshkey_impl sshkey_rsa_impl = {
573 /* .name = */ "ssh-rsa",
574 /* .shortname = */ "RSA",
575 /* .sigalg = */ NULL,
576 /* .type = */ KEY_RSA,
577 /* .nid = */ 0,
578 /* .cert = */ 0,
579 /* .sigonly = */ 0,
580 /* .keybits = */ 0,
581 /* .funcs = */ &sshkey_rsa_funcs,
582 };
583
584 const struct sshkey_impl sshkey_rsa_cert_impl = {
585 /* .name = */ "ssh-rsa-cert-v01@openssh.com",
586 /* .shortname = */ "RSA-CERT",
587 /* .sigalg = */ NULL,
588 /* .type = */ KEY_RSA_CERT,
589 /* .nid = */ 0,
590 /* .cert = */ 1,
591 /* .sigonly = */ 0,
592 /* .keybits = */ 0,
593 /* .funcs = */ &sshkey_rsa_funcs,
594 };
595
596 /* SHA2 signature algorithms */
597
598 const struct sshkey_impl sshkey_rsa_sha256_impl = {
599 /* .name = */ "rsa-sha2-256",
600 /* .shortname = */ "RSA",
601 /* .sigalg = */ NULL,
602 /* .type = */ KEY_RSA,
603 /* .nid = */ 0,
604 /* .cert = */ 0,
605 /* .sigonly = */ 1,
606 /* .keybits = */ 0,
607 /* .funcs = */ &sshkey_rsa_funcs,
608 };
609
610 const struct sshkey_impl sshkey_rsa_sha512_impl = {
611 /* .name = */ "rsa-sha2-512",
612 /* .shortname = */ "RSA",
613 /* .sigalg = */ NULL,
614 /* .type = */ KEY_RSA,
615 /* .nid = */ 0,
616 /* .cert = */ 0,
617 /* .sigonly = */ 1,
618 /* .keybits = */ 0,
619 /* .funcs = */ &sshkey_rsa_funcs,
620 };
621
622 const struct sshkey_impl sshkey_rsa_sha256_cert_impl = {
623 /* .name = */ "rsa-sha2-256-cert-v01@openssh.com",
624 /* .shortname = */ "RSA-CERT",
625 /* .sigalg = */ "rsa-sha2-256",
626 /* .type = */ KEY_RSA_CERT,
627 /* .nid = */ 0,
628 /* .cert = */ 1,
629 /* .sigonly = */ 1,
630 /* .keybits = */ 0,
631 /* .funcs = */ &sshkey_rsa_funcs,
632 };
633
634 const struct sshkey_impl sshkey_rsa_sha512_cert_impl = {
635 /* .name = */ "rsa-sha2-512-cert-v01@openssh.com",
636 /* .shortname = */ "RSA-CERT",
637 /* .sigalg = */ "rsa-sha2-512",
638 /* .type = */ KEY_RSA_CERT,
639 /* .nid = */ 0,
640 /* .cert = */ 1,
641 /* .sigonly = */ 1,
642 /* .keybits = */ 0,
643 /* .funcs = */ &sshkey_rsa_funcs,
644 };
645 #endif /* WITH_OPENSSL */
646