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Constify various mostly X509-related parameter types in crypto/ and apps/
[thirdparty/openssl.git] / crypto / rsa / rsa_ameth.c
CommitLineData
0f113f3e 1/*
b0edda11 2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
448be743 3 *
2a7b6f39 4 * Licensed under the Apache License 2.0 (the "License"). You may not use
2039c421
RS		 5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
448be743
DSH		 8 */
9
c5f87134
P		 10/*
11 * RSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14#include "internal/deprecated.h"
15
448be743 16#include <stdio.h>
b39fc560 17#include "internal/cryptlib.h"
448be743
DSH		 18#include <openssl/asn1t.h>
19#include <openssl/x509.h>
1e26a8ba 20#include <openssl/bn.h>
3c27208f 21#include <openssl/cms.h>
29be6023
RL		 22#include <openssl/core_names.h>
23#include "internal/param_build.h"
25f2138b
DMSP		 24#include "crypto/asn1.h"
25#include "crypto/evp.h"
29be6023 26#include "crypto/rsa.h"
706457b7 27#include "rsa_local.h"
448be743 28
e968561d 29#ifndef OPENSSL_NO_CMS
0574cadf
DSH		 30static int rsa_cms_sign(CMS_SignerInfo *si);
31static int rsa_cms_verify(CMS_SignerInfo *si);
32static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
33static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
e968561d 34#endif
0574cadf 35
b35b8d11
DSH		 36static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
37
42009ae8
DSH		 38/* Set any parameters associated with pkey */
39static int rsa_param_encode(const EVP_PKEY *pkey,
40 ASN1_STRING **pstr, int *pstrtype)
41{
42 const RSA *rsa = pkey->pkey.rsa;
52ad523c 43
42009ae8
DSH		 44 *pstr = NULL;
45 /* If RSA it's just NULL type */
1f483a69 46 if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) {
42009ae8
DSH		 47 *pstrtype = V_ASN1_NULL;
48 return 1;
49 }
50 /* If no PSS parameters we omit parameters entirely */
51 if (rsa->pss == NULL) {
52 *pstrtype = V_ASN1_UNDEF;
53 return 1;
54 }
55 /* Encode PSS parameters */
f291138b 56 if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
42009ae8 57 return 0;
42009ae8
DSH		 58
59 *pstrtype = V_ASN1_SEQUENCE;
60 return 1;
61}
62/* Decode any parameters and set them in RSA structure */
63static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
64{
65 const ASN1_OBJECT *algoid;
66 const void *algp;
67 int algptype;
68
69 X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
1f483a69 70 if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
42009ae8
DSH		 71 return 1;
72 if (algptype == V_ASN1_UNDEF)
73 return 1;
635fe50f
DSH		 74 if (algptype != V_ASN1_SEQUENCE) {
75 RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
42009ae8 76 return 0;
635fe50f 77 }
b35b8d11 78 rsa->pss = rsa_pss_decode(alg);
42009ae8
DSH		 79 if (rsa->pss == NULL)
80 return 0;
81 return 1;
82}
83
6f81892e 84static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
0f113f3e
MC		 85{
86 unsigned char *penc = NULL;
87 int penclen;
42009ae8
DSH		 88 ASN1_STRING *str;
89 int strtype;
52ad523c 90
42009ae8
DSH		 91 if (!rsa_param_encode(pkey, &str, &strtype))
92 return 0;
0f113f3e
MC		 93 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
94 if (penclen <= 0)
95 return 0;
42009ae8
DSH		 96 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
97 strtype, str, penc, penclen))
0f113f3e
MC		 98 return 1;
99
100 OPENSSL_free(penc);
101 return 0;
102}
448be743
DSH		 103
104static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
0f113f3e
MC		 105{
106 const unsigned char *p;
107 int pklen;
42009ae8 108 X509_ALGOR *alg;
0f113f3e 109 RSA *rsa = NULL;
75ebbd9a 110
42009ae8 111 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
0f113f3e 112 return 0;
75ebbd9a 113 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
0f113f3e
MC		 114 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
115 return 0;
116 }
42009ae8
DSH		 117 if (!rsa_param_decode(rsa, alg)) {
118 RSA_free(rsa);
119 return 0;
120 }
1f483a69
BE		 121 if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
122 RSA_free(rsa);
123 return 0;
124 }
0f113f3e
MC		 125 return 1;
126}
448be743 127
6f81892e 128static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
0f113f3e
MC		 129{
130 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
131 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
132 return 0;
133 return 1;
134}
6f81892e 135
e4263314 136static int old_rsa_priv_decode(EVP_PKEY *pkey,
0f113f3e
MC		 137 const unsigned char **pder, int derlen)
138{
139 RSA *rsa;
75ebbd9a
RS		 140
141 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
0f113f3e
MC		 142 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
143 return 0;
144 }
faa02fe2 145 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
0f113f3e
MC		 146 return 1;
147}
448be743 148
e4263314 149static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
0f113f3e
MC		 150{
151 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
152}
e4263314 153
6f81892e 154static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
0f113f3e
MC		 155{
156 unsigned char *rk = NULL;
157 int rklen;
42009ae8
DSH		 158 ASN1_STRING *str;
159 int strtype;
52ad523c 160
42009ae8
DSH		 161 if (!rsa_param_encode(pkey, &str, &strtype))
162 return 0;
0f113f3e
MC		 163 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
164
165 if (rklen <= 0) {
166 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
285c7d9c 167 ASN1_STRING_free(str);
0f113f3e
MC		 168 return 0;
169 }
170
faa02fe2 171 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
42009ae8 172 strtype, str, rk, rklen)) {
0f113f3e 173 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
285c7d9c 174 ASN1_STRING_free(str);
0f113f3e
MC		 175 return 0;
176 }
177
178 return 1;
179}
448be743 180
245c6bc3 181static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
0f113f3e
MC		 182{
183 const unsigned char *p;
42009ae8 184 RSA *rsa;
0f113f3e 185 int pklen;
42009ae8
DSH		 186 const X509_ALGOR *alg;
187
188 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
189 return 0;
190 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
191 if (rsa == NULL) {
192 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
193 return 0;
194 }
195 if (!rsa_param_decode(rsa, alg)) {
196 RSA_free(rsa);
0f113f3e 197 return 0;
42009ae8
DSH		 198 }
199 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
200 return 1;
0f113f3e 201}
e4263314 202
6f81892e 203static int int_rsa_size(const EVP_PKEY *pkey)
0f113f3e
MC		 204{
205 return RSA_size(pkey->pkey.rsa);
206}
6f81892e
DSH		 207
208static int rsa_bits(const EVP_PKEY *pkey)
0f113f3e
MC		 209{
210 return BN_num_bits(pkey->pkey.rsa->n);
211}
6f81892e 212
2514fa79 213static int rsa_security_bits(const EVP_PKEY *pkey)
0f113f3e
MC		 214{
215 return RSA_security_bits(pkey->pkey.rsa);
216}
2514fa79 217
6f81892e 218static void int_rsa_free(EVP_PKEY *pkey)
0f113f3e
MC		 219{
220 RSA_free(pkey->pkey.rsa);
221}
35208f36 222
9503ed8b
DSH		 223static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
224{
225 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
226 return NULL;
227 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
228 alg->parameter);
229}
230
231static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
232 int indent)
233{
234 int rv = 0;
235 X509_ALGOR *maskHash = NULL;
52ad523c 236
9503ed8b
DSH		 237 if (!BIO_indent(bp, indent, 128))
238 goto err;
239 if (pss_key) {
240 if (pss == NULL) {
241 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
242 return 0;
243 return 1;
244 } else {
245 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
246 return 0;
247 }
248 } else if (pss == NULL) {
249 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
250 return 0;
251 return 1;
252 }
253 if (BIO_puts(bp, "\n") <= 0)
254 goto err;
255 if (pss_key)
256 indent += 2;
257 if (!BIO_indent(bp, indent, 128))
258 goto err;
259 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
260 goto err;
261
262 if (pss->hashAlgorithm) {
263 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
264 goto err;
90862ab4 265 } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
9503ed8b 266 goto err;
90862ab4 267 }
9503ed8b
DSH		 268
269 if (BIO_puts(bp, "\n") <= 0)
270 goto err;
271
272 if (!BIO_indent(bp, indent, 128))
273 goto err;
274
275 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
276 goto err;
277 if (pss->maskGenAlgorithm) {
278 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
279 goto err;
280 if (BIO_puts(bp, " with ") <= 0)
281 goto err;
282 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
283 if (maskHash != NULL) {
284 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
285 goto err;
90862ab4 286 } else if (BIO_puts(bp, "INVALID") <= 0) {
9503ed8b 287 goto err;
90862ab4
PY		 288 }
289 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
9503ed8b 290 goto err;
90862ab4 291 }
9503ed8b
DSH		 292 BIO_puts(bp, "\n");
293
294 if (!BIO_indent(bp, indent, 128))
295 goto err;
296 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
297 goto err;
298 if (pss->saltLength) {
299 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
300 goto err;
90862ab4 301 } else if (BIO_puts(bp, "14 (default)") <= 0) {
9503ed8b 302 goto err;
90862ab4 303 }
9503ed8b
DSH		 304 BIO_puts(bp, "\n");
305
306 if (!BIO_indent(bp, indent, 128))
307 goto err;
308 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
309 goto err;
310 if (pss->trailerField) {
311 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
312 goto err;
90862ab4 313 } else if (BIO_puts(bp, "BC (default)") <= 0) {
9503ed8b 314 goto err;
90862ab4 315 }
9503ed8b
DSH		 316 BIO_puts(bp, "\n");
317
318 rv = 1;
319
320 err:
321 X509_ALGOR_free(maskHash);
322 return rv;
323
324}
325
326static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
0f113f3e 327{
9503ed8b 328 const RSA *x = pkey->pkey.rsa;
0f113f3e
MC		 329 char *str;
330 const char *s;
665d899f 331 int ret = 0, mod_len = 0, ex_primes;
0f113f3e
MC		 332
333 if (x->n != NULL)
334 mod_len = BN_num_bits(x->n);
665d899f 335 ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
0f113f3e
MC		 336
337 if (!BIO_indent(bp, off, 128))
338 goto err;
339
87ee7b22 340 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
9503ed8b
DSH		 341 goto err;
342
0f113f3e 343 if (priv && x->d) {
665d899f
PY		 344 if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
345 mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
0f113f3e
MC		 346 goto err;
347 str = "modulus:";
348 s = "publicExponent:";
349 } else {
a773b52a 350 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
0f113f3e
MC		 351 goto err;
352 str = "Modulus:";
353 s = "Exponent:";
354 }
a773b52a 355 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
0f113f3e 356 goto err;
a773b52a 357 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
0f113f3e
MC		 358 goto err;
359 if (priv) {
665d899f
PY		 360 int i;
361
a773b52a 362 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
0f113f3e 363 goto err;
a773b52a 364 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
0f113f3e 365 goto err;
a773b52a 366 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
0f113f3e 367 goto err;
a773b52a 368 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
0f113f3e 369 goto err;
a773b52a 370 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
0f113f3e 371 goto err;
a773b52a 372 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
0f113f3e 373 goto err;
665d899f
PY		 374 for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
375 /* print multi-prime info */
376 BIGNUM *bn = NULL;
377 RSA_PRIME_INFO *pinfo;
378 int j;
379
380 pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
381 for (j = 0; j < 3; j++) {
382 if (!BIO_indent(bp, off, 128))
383 goto err;
384 switch (j) {
385 case 0:
386 if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
387 goto err;
388 bn = pinfo->r;
389 break;
390 case 1:
391 if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
392 goto err;
393 bn = pinfo->d;
394 break;
395 case 2:
396 if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
397 goto err;
398 bn = pinfo->t;
399 break;
400 default:
401 break;
402 }
403 if (!ASN1_bn_print(bp, "", bn, NULL, off))
404 goto err;
405 }
406 }
0f113f3e 407 }
87ee7b22 408 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
9503ed8b 409 goto err;
0f113f3e
MC		 410 ret = 1;
411 err:
9503ed8b 412 return ret;
0f113f3e 413}
35208f36
DSH		 414
415static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
0f113f3e
MC		 416 ASN1_PCTX *ctx)
417{
9503ed8b 418 return pkey_rsa_print(bp, pkey, indent, 0);
0f113f3e 419}
35208f36
DSH		 420
421static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
0f113f3e
MC		 422 ASN1_PCTX *ctx)
423{
9503ed8b 424 return pkey_rsa_print(bp, pkey, indent, 1);
0f113f3e 425}
0574cadf 426
6745a1ff 427static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
0f113f3e 428{
0f113f3e
MC		 429 RSA_PSS_PARAMS *pss;
430
e93c8748
DSH		 431 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
432 alg->parameter);
0f113f3e 433
6745a1ff 434 if (pss == NULL)
0f113f3e
MC		 435 return NULL;
436
6745a1ff
DSH		 437 if (pss->maskGenAlgorithm != NULL) {
438 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
439 if (pss->maskHash == NULL) {
440 RSA_PSS_PARAMS_free(pss);
441 return NULL;
442 }
443 }
0f113f3e
MC		 444
445 return pss;
446}
447
ff04bbe3 448static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
0f113f3e
MC		 449 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
450{
ffc6fad5 451 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
0f113f3e 452 int rv;
52ad523c 453 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
c82bafc5 454
9503ed8b 455 rv = rsa_pss_param_print(bp, 0, pss, indent);
25aaa98a 456 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 457 if (!rv)
458 return 0;
a4c467c9 459 } else if (BIO_puts(bp, "\n") <= 0) {
0f113f3e 460 return 0;
52ad523c 461 }
0f113f3e
MC		 462 if (sig)
463 return X509_signature_dump(bp, sig, indent);
464 return 1;
465}
492a9e24
DSH		 466
467static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
0f113f3e
MC		 468{
469 X509_ALGOR *alg = NULL;
9bcc9f97
MC		 470 const EVP_MD *md;
471 const EVP_MD *mgf1md;
472 int min_saltlen;
52ad523c 473
0f113f3e
MC		 474 switch (op) {
475
476 case ASN1_PKEY_CTRL_PKCS7_SIGN:
477 if (arg1 == 0)
478 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
479 break;
480
481 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
53d2260c
DSH		 482 if (pkey_is_pss(pkey))
483 return -2;
0f113f3e
MC		 484 if (arg1 == 0)
485 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
486 break;
8931b30d 487#ifndef OPENSSL_NO_CMS
0f113f3e
MC		 488 case ASN1_PKEY_CTRL_CMS_SIGN:
489 if (arg1 == 0)
490 return rsa_cms_sign(arg2);
491 else if (arg1 == 1)
492 return rsa_cms_verify(arg2);
493 break;
494
495 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
53d2260c
DSH		 496 if (pkey_is_pss(pkey))
497 return -2;
0f113f3e
MC		 498 if (arg1 == 0)
499 return rsa_cms_encrypt(arg2);
500 else if (arg1 == 1)
501 return rsa_cms_decrypt(arg2);
502 break;
503
504 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
53d2260c
DSH		 505 if (pkey_is_pss(pkey))
506 return -2;
0f113f3e
MC		 507 *(int *)arg2 = CMS_RECIPINFO_TRANS;
508 return 1;
8931b30d 509#endif
a78568b7 510
0f113f3e 511 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
9bcc9f97
MC		 512 if (pkey->pkey.rsa->pss != NULL) {
513 if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
514 &min_saltlen)) {
515 RSAerr(0, ERR_R_INTERNAL_ERROR);
516 return 0;
517 }
518 *(int *)arg2 = EVP_MD_type(md);
519 /* Return of 2 indicates this MD is mandatory */
520 return 2;
521 }
0f113f3e
MC		 522 *(int *)arg2 = NID_sha256;
523 return 1;
03919683 524
0f113f3e
MC		 525 default:
526 return -2;
492a9e24 527
0f113f3e 528 }
492a9e24 529
0f113f3e
MC		 530 if (alg)
531 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
4f1aa191 532
0f113f3e 533 return 1;
4f1aa191 534
0f113f3e 535}
492a9e24 536
0574cadf
DSH		 537/* allocate and set algorithm ID from EVP_MD, default SHA1 */
538static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
0f113f3e 539{
47e42b3c 540 if (md == NULL || EVP_MD_type(md) == NID_sha1)
0f113f3e
MC		 541 return 1;
542 *palg = X509_ALGOR_new();
90945fa3 543 if (*palg == NULL)
0f113f3e
MC		 544 return 0;
545 X509_ALGOR_set_md(*palg, md);
546 return 1;
547}
0574cadf
DSH		 548
549/* Allocate and set MGF1 algorithm ID from EVP_MD */
550static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
0f113f3e
MC		 551{
552 X509_ALGOR *algtmp = NULL;
553 ASN1_STRING *stmp = NULL;
52ad523c 554
0f113f3e 555 *palg = NULL;
47e42b3c 556 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
0f113f3e
MC		 557 return 1;
558 /* need to embed algorithm ID inside another */
559 if (!rsa_md_to_algor(&algtmp, mgf1md))
560 goto err;
f291138b 561 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
0f113f3e
MC		 562 goto err;
563 *palg = X509_ALGOR_new();
90945fa3 564 if (*palg == NULL)
0f113f3e
MC		 565 goto err;
566 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
567 stmp = NULL;
568 err:
0dfb9398 569 ASN1_STRING_free(stmp);
222561fe 570 X509_ALGOR_free(algtmp);
0f113f3e
MC		 571 if (*palg)
572 return 1;
573 return 0;
574}
0574cadf
DSH		 575
576/* convert algorithm ID to EVP_MD, default SHA1 */
577static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
0f113f3e
MC		 578{
579 const EVP_MD *md;
52ad523c 580
0f113f3e
MC		 581 if (!alg)
582 return EVP_sha1();
583 md = EVP_get_digestbyobj(alg->algorithm);
584 if (md == NULL)
585 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
586 return md;
587}
588
0f113f3e 589/*
47e42b3c 590 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
0574cadf 591 * suitable for setting an AlgorithmIdentifier.
31904ecd
DSH		 592 */
593
47e42b3c 594static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
0f113f3e
MC		 595{
596 const EVP_MD *sigmd, *mgf1md;
0f113f3e 597 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
9767a3dc 598 RSA *rsa = EVP_PKEY_get0_RSA(pk);
47e42b3c 599 int saltlen;
52ad523c 600
0f113f3e 601 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
47e42b3c 602 return NULL;
0f113f3e 603 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
47e42b3c 604 return NULL;
0f113f3e 605 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
47e42b3c 606 return NULL;
90862ab4 607 if (saltlen == -1) {
0f113f3e 608 saltlen = EVP_MD_size(sigmd);
491360e7 609 } else if (saltlen == -2 || saltlen == -3) {
9767a3dc 610 saltlen = RSA_size(rsa) - EVP_MD_size(sigmd) - 2;
137096a7 611 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
0f113f3e 612 saltlen--;
491360e7
BE		 613 if (saltlen < 0)
614 return NULL;
0f113f3e 615 }
47e42b3c
DSH		 616
617 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
618}
619
620RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
621 const EVP_MD *mgf1md, int saltlen)
622{
623 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
52ad523c 624
90945fa3 625 if (pss == NULL)
0f113f3e
MC		 626 goto err;
627 if (saltlen != 20) {
628 pss->saltLength = ASN1_INTEGER_new();
90945fa3 629 if (pss->saltLength == NULL)
0f113f3e
MC		 630 goto err;
631 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
632 goto err;
633 }
634 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
635 goto err;
47e42b3c 636 if (mgf1md == NULL)
b6b885c6 637 mgf1md = sigmd;
0f113f3e
MC		 638 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
639 goto err;
74753357
DSH		 640 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
641 goto err;
47e42b3c 642 return pss;
0f113f3e 643 err:
25aaa98a 644 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 645 return NULL;
646}
647
47e42b3c
DSH		 648static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
649{
650 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
f291138b 651 ASN1_STRING *os;
52ad523c 652
47e42b3c
DSH		 653 if (pss == NULL)
654 return NULL;
655
f291138b 656 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
47e42b3c
DSH		 657 RSA_PSS_PARAMS_free(pss);
658 return os;
659}
660
0f113f3e
MC		 661/*
662 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
0d4fb843 663 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
0f113f3e 664 * passed to pkctx instead.
0574cadf 665 */
31904ecd 666
0574cadf 667static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
0f113f3e
MC		 668 X509_ALGOR *sigalg, EVP_PKEY *pkey)
669{
670 int rv = -1;
671 int saltlen;
672 const EVP_MD *mgf1md = NULL, *md = NULL;
673 RSA_PSS_PARAMS *pss;
52ad523c 674
0f113f3e 675 /* Sanity check: make sure it is PSS */
ffc6fad5 676 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
0f113f3e
MC		 677 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
678 return -1;
679 }
680 /* Decode PSS parameters */
6745a1ff 681 pss = rsa_pss_decode(sigalg);
0f113f3e 682
cfd81c6d 683 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
0f113f3e
MC		 684 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
685 goto err;
686 }
0f113f3e
MC		 687
688 /* We have all parameters now set up context */
0f113f3e
MC		 689 if (pkey) {
690 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
691 goto err;
692 } else {
693 const EVP_MD *checkmd;
694 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
695 goto err;
696 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
697 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
698 goto err;
699 }
700 }
701
702 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
703 goto err;
704
705 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
706 goto err;
707
708 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
709 goto err;
710 /* Carry on */
711 rv = 1;
712
713 err:
714 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 715 return rv;
716}
492a9e24 717
cfd81c6d
DSH		 718int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
719 const EVP_MD **pmgf1md, int *psaltlen)
720{
721 if (pss == NULL)
722 return 0;
723 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
724 if (*pmd == NULL)
725 return 0;
726 *pmgf1md = rsa_algor_to_md(pss->maskHash);
727 if (*pmgf1md == NULL)
728 return 0;
729 if (pss->saltLength) {
730 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
731 if (*psaltlen < 0) {
732 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
733 return 0;
734 }
c82bafc5 735 } else {
cfd81c6d 736 *psaltlen = 20;
c82bafc5 737 }
cfd81c6d
DSH		 738
739 /*
740 * low-level routines support only trailer field 0xbc (value 1) and
741 * PKCS#1 says we should reject any other value anyway.
742 */
743 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
744 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
b6b885c6 745 return 0;
cfd81c6d
DSH		 746 }
747
748 return 1;
749}
750
e968561d 751#ifndef OPENSSL_NO_CMS
0574cadf 752static int rsa_cms_verify(CMS_SignerInfo *si)
0f113f3e
MC		 753{
754 int nid, nid2;
755 X509_ALGOR *alg;
756 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
52ad523c 757
0f113f3e
MC		 758 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
759 nid = OBJ_obj2nid(alg->algorithm);
ffc6fad5 760 if (nid == EVP_PKEY_RSA_PSS)
0f113f3e 761 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
08be0331
DSH		 762 /* Only PSS allowed for PSS keys */
763 if (pkey_ctx_is_pss(pkctx)) {
764 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
765 return 0;
766 }
767 if (nid == NID_rsaEncryption)
768 return 1;
0f113f3e
MC		 769 /* Workaround for some implementation that use a signature OID */
770 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
771 if (nid2 == NID_rsaEncryption)
772 return 1;
773 }
774 return 0;
775}
e968561d 776#endif
0f113f3e
MC		 777
778/*
779 * Customised RSA item verification routine. This is called when a signature
780 * is encountered requiring special handling. We currently only handle PSS.
0574cadf
DSH		 781 */
782
0574cadf 783static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
0f113f3e
MC		 784 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
785 EVP_PKEY *pkey)
786{
787 /* Sanity check: make sure it is PSS */
ffc6fad5 788 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
0f113f3e
MC		 789 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
790 return -1;
791 }
09f06923 792 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
0f113f3e
MC		 793 /* Carry on */
794 return 2;
09f06923 795 }
0f113f3e
MC		 796 return -1;
797}
0574cadf 798
e968561d 799#ifndef OPENSSL_NO_CMS
0574cadf 800static int rsa_cms_sign(CMS_SignerInfo *si)
0f113f3e
MC		 801{
802 int pad_mode = RSA_PKCS1_PADDING;
803 X509_ALGOR *alg;
804 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
805 ASN1_STRING *os = NULL;
52ad523c 806
0f113f3e
MC		 807 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
808 if (pkctx) {
809 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
810 return 0;
811 }
812 if (pad_mode == RSA_PKCS1_PADDING) {
813 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
814 return 1;
815 }
816 /* We don't support it */
817 if (pad_mode != RSA_PKCS1_PSS_PADDING)
818 return 0;
47e42b3c 819 os = rsa_ctx_to_pss_string(pkctx);
0f113f3e
MC		 820 if (!os)
821 return 0;
ffc6fad5 822 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
0f113f3e
MC		 823 return 1;
824}
e968561d 825#endif
0574cadf 826
17c63d1c 827static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
0f113f3e
MC		 828 X509_ALGOR *alg1, X509_ALGOR *alg2,
829 ASN1_BIT_STRING *sig)
830{
831 int pad_mode;
6e59a892 832 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
52ad523c 833
0f113f3e
MC		 834 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
835 return 0;
836 if (pad_mode == RSA_PKCS1_PADDING)
837 return 2;
838 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
839 ASN1_STRING *os1 = NULL;
47e42b3c 840 os1 = rsa_ctx_to_pss_string(pkctx);
0f113f3e
MC		 841 if (!os1)
842 return 0;
843 /* Duplicate parameters if we have to */
844 if (alg2) {
845 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
846 if (!os2) {
847 ASN1_STRING_free(os1);
848 return 0;
849 }
ffc6fad5 850 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
0f113f3e
MC		 851 V_ASN1_SEQUENCE, os2);
852 }
ffc6fad5 853 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
0f113f3e
MC		 854 V_ASN1_SEQUENCE, os1);
855 return 3;
856 }
857 return 2;
858}
17c63d1c 859
629e369c
DSH		 860static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
861 const ASN1_STRING *sig)
862{
863 int rv = 0;
864 int mdnid, saltlen;
865 uint32_t flags;
866 const EVP_MD *mgf1md = NULL, *md = NULL;
867 RSA_PSS_PARAMS *pss;
b744f915 868 int secbits;
629e369c
DSH		 869
870 /* Sanity check: make sure it is PSS */
871 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
872 return 0;
873 /* Decode PSS parameters */
874 pss = rsa_pss_decode(sigalg);
875 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
876 goto err;
877 mdnid = EVP_MD_type(md);
878 /*
879 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
880 * match and salt length must equal digest size
881 */
882 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
883 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
884 flags = X509_SIG_INFO_TLS;
885 else
886 flags = 0;
887 /* Note: security bits half number of digest bits */
b744f915
KR		 888 secbits = EVP_MD_size(md) * 4;
889 /*
890 * SHA1 and MD5 are known to be broken. Reduce security bits so that
891 * they're no longer accepted at security level 1. The real values don't
892 * really matter as long as they're lower than 80, which is our security
893 * level 1.
894 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for SHA1 at
895 * 2^63.4
896 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
897 * puts a chosen-prefix attack for MD5 at 2^39.
898 */
899 if (mdnid == NID_sha1)
900 secbits = 64;
901 else if (mdnid == NID_md5_sha1)
902 secbits = 68;
903 else if (mdnid == NID_md5)
904 secbits = 39;
905 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, secbits,
629e369c
DSH		 906 flags);
907 rv = 1;
908 err:
909 RSA_PSS_PARAMS_free(pss);
910 return rv;
911}
912
e968561d 913#ifndef OPENSSL_NO_CMS
6745a1ff 914static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
0f113f3e 915{
6745a1ff 916 RSA_OAEP_PARAMS *oaep;
0574cadf 917
6745a1ff 918 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
52ad523c 919 alg->parameter);
0574cadf 920
6745a1ff 921 if (oaep == NULL)
0f113f3e 922 return NULL;
0574cadf 923
6745a1ff
DSH		 924 if (oaep->maskGenFunc != NULL) {
925 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
926 if (oaep->maskHash == NULL) {
927 RSA_OAEP_PARAMS_free(oaep);
928 return NULL;
929 }
930 }
931 return oaep;
0f113f3e 932}
0574cadf
DSH		 933
934static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
0f113f3e
MC		 935{
936 EVP_PKEY_CTX *pkctx;
937 X509_ALGOR *cmsalg;
938 int nid;
939 int rv = -1;
940 unsigned char *label = NULL;
941 int labellen = 0;
942 const EVP_MD *mgf1md = NULL, *md = NULL;
943 RSA_OAEP_PARAMS *oaep;
52ad523c 944
0f113f3e 945 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
52ad523c 946 if (pkctx == NULL)
0f113f3e
MC		 947 return 0;
948 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
949 return -1;
950 nid = OBJ_obj2nid(cmsalg->algorithm);
951 if (nid == NID_rsaEncryption)
952 return 1;
953 if (nid != NID_rsaesOaep) {
954 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
955 return -1;
956 }
957 /* Decode OAEP parameters */
6745a1ff 958 oaep = rsa_oaep_decode(cmsalg);
0f113f3e
MC		 959
960 if (oaep == NULL) {
961 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
962 goto err;
963 }
964
6745a1ff 965 mgf1md = rsa_algor_to_md(oaep->maskHash);
52ad523c 966 if (mgf1md == NULL)
0f113f3e
MC		 967 goto err;
968 md = rsa_algor_to_md(oaep->hashFunc);
52ad523c 969 if (md == NULL)
0f113f3e
MC		 970 goto err;
971
52ad523c 972 if (oaep->pSourceFunc != NULL) {
0f113f3e 973 X509_ALGOR *plab = oaep->pSourceFunc;
52ad523c 974
0f113f3e
MC		 975 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
976 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
977 goto err;
978 }
979 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
980 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
981 goto err;
982 }
983
984 label = plab->parameter->value.octet_string->data;
985 /* Stop label being freed when OAEP parameters are freed */
986 plab->parameter->value.octet_string->data = NULL;
987 labellen = plab->parameter->value.octet_string->length;
988 }
989
990 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
991 goto err;
992 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
993 goto err;
994 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
995 goto err;
996 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
997 goto err;
998 /* Carry on */
999 rv = 1;
1000
1001 err:
1002 RSA_OAEP_PARAMS_free(oaep);
0f113f3e
MC		 1003 return rv;
1004}
0574cadf
DSH		 1005
1006static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
0f113f3e
MC		 1007{
1008 const EVP_MD *md, *mgf1md;
1009 RSA_OAEP_PARAMS *oaep = NULL;
1010 ASN1_STRING *os = NULL;
1011 X509_ALGOR *alg;
1012 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
1013 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
1014 unsigned char *label;
52ad523c 1015
178989b4
BS		 1016 if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
1017 return 0;
0f113f3e
MC		 1018 if (pkctx) {
1019 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
1020 return 0;
1021 }
1022 if (pad_mode == RSA_PKCS1_PADDING) {
1023 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
1024 return 1;
1025 }
1026 /* Not supported */
1027 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
1028 return 0;
1029 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
1030 goto err;
1031 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
1032 goto err;
1033 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
1034 if (labellen < 0)
1035 goto err;
1036 oaep = RSA_OAEP_PARAMS_new();
90945fa3 1037 if (oaep == NULL)
0f113f3e
MC		 1038 goto err;
1039 if (!rsa_md_to_algor(&oaep->hashFunc, md))
1040 goto err;
1041 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1042 goto err;
1043 if (labellen > 0) {
5e8129f2 1044 ASN1_OCTET_STRING *los;
0f113f3e 1045 oaep->pSourceFunc = X509_ALGOR_new();
90945fa3 1046 if (oaep->pSourceFunc == NULL)
0f113f3e 1047 goto err;
5e8129f2 1048 los = ASN1_OCTET_STRING_new();
90945fa3 1049 if (los == NULL)
0f113f3e
MC		 1050 goto err;
1051 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1052 ASN1_OCTET_STRING_free(los);
1053 goto err;
1054 }
1055 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1056 V_ASN1_OCTET_STRING, los);
1057 }
1058 /* create string with pss parameter encoding. */
1059 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1060 goto err;
1061 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1062 os = NULL;
1063 rv = 1;
1064 err:
25aaa98a 1065 RSA_OAEP_PARAMS_free(oaep);
0dfb9398 1066 ASN1_STRING_free(os);
0f113f3e
MC		 1067 return rv;
1068}
e968561d 1069#endif
0f113f3e 1070
2aee35d3
PY		 1071static int rsa_pkey_check(const EVP_PKEY *pkey)
1072{
1073 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1074}
1075
29be6023
RL		 1076static size_t rsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
1077{
1078 return pkey->pkey.rsa->dirty_cnt;
1079}
1080
1081DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
1082
b305452f
RL		 1083static int rsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1084 EVP_KEYMGMT *to_keymgmt)
29be6023 1085{
b305452f 1086 RSA *rsa = from->pkey.rsa;
29be6023
RL		 1087 OSSL_PARAM_BLD tmpl;
1088 const BIGNUM *n = RSA_get0_n(rsa), *e = RSA_get0_e(rsa);
1089 const BIGNUM *d = RSA_get0_d(rsa);
1090 STACK_OF(BIGNUM_const) *primes = NULL, *exps = NULL, *coeffs = NULL;
1091 int numprimes = 0, numexps = 0, numcoeffs = 0;
1092 OSSL_PARAM *params = NULL;
b305452f 1093 int rv = 0;
29be6023 1094
df13defd
RL		 1095 /*
1096 * If the RSA method is foreign, then we can't be sure of anything, and
1097 * can therefore not export or pretend to export.
1098 */
1099 if (RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
1100 return 0;
1101
b305452f
RL		 1102 /* Public parameters must always be present */
1103 if (n == NULL || e == NULL)
29be6023
RL		 1104 goto err;
1105
b305452f 1106 ossl_param_bld_init(&tmpl);
29be6023 1107
b305452f
RL		 1108 /* |e| and |n| are always present */
1109 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_E, e))
29be6023 1110 goto err;
b305452f 1111 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_N, n))
29be6023
RL		 1112 goto err;
1113
1114 if (d != NULL) {
b305452f
RL		 1115 int i;
1116
1117 /* Get all the primes and CRT params */
1118 if ((primes = sk_BIGNUM_const_new_null()) == NULL
1119 || (exps = sk_BIGNUM_const_new_null()) == NULL
1120 || (coeffs = sk_BIGNUM_const_new_null()) == NULL)
1121 goto err;
1122
1123 if (!rsa_get0_all_params(rsa, primes, exps, coeffs))
1124 goto err;
1125
29be6023
RL		 1126 numprimes = sk_BIGNUM_const_num(primes);
1127 numexps = sk_BIGNUM_const_num(exps);
1128 numcoeffs = sk_BIGNUM_const_num(coeffs);
1129
a9127c1d
RL		 1130 /*
1131 * It's permisssible to have zero primes, i.e. no CRT params.
1132 * Otherwise, there must be at least two, as many exponents,
1133 * and one coefficient less.
1134 */
1135 if (numprimes != 0
1136 && (numprimes < 2 || numexps < 2 || numcoeffs < 1))
29be6023
RL		 1137 goto err;
1138
081d08fa 1139 /* assert that an OSSL_PARAM_BLD has enough space. */
29be6023
RL		 1140 if (!ossl_assert(/* n, e */ 2 + /* d */ 1 + /* numprimes */ 1
1141 + numprimes + numexps + numcoeffs
1142 <= OSSL_PARAM_BLD_MAX))
1143 goto err;
29be6023
RL		 1144
1145 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_D, d))
1146 goto err;
1147
1148 for (i = 0; i < numprimes; i++) {
1149 const BIGNUM *num = sk_BIGNUM_const_value(primes, i);
1150
1151 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_FACTOR,
1152 num))
1153 goto err;
1154 }
1155
1156 for (i = 0; i < numexps; i++) {
1157 const BIGNUM *num = sk_BIGNUM_const_value(exps, i);
1158
1159 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_EXPONENT,
1160 num))
1161 goto err;
1162 }
1163
1164 for (i = 0; i < numcoeffs; i++) {
1165 const BIGNUM *num = sk_BIGNUM_const_value(coeffs, i);
1166
1167 if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_COEFFICIENT,
1168 num))
1169 goto err;
1170 }
1171 }
1172
1173 if ((params = ossl_param_bld_to_param(&tmpl)) == NULL)
1174 goto err;
1175
1176 /* We export, the provider imports */
b305452f
RL		 1177 rv = evp_keymgmt_import(to_keymgmt, to_keydata, OSSL_KEYMGMT_SELECT_ALL,
1178 params);
29be6023
RL		 1179
1180 err:
1181 sk_BIGNUM_const_free(primes);
1182 sk_BIGNUM_const_free(exps);
1183 sk_BIGNUM_const_free(coeffs);
1184 ossl_param_bld_free(params);
b305452f 1185 return rv;
29be6023
RL		 1186}
1187
578b5514 1188const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
0f113f3e
MC		 1189 {
1190 EVP_PKEY_RSA,
1191 EVP_PKEY_RSA,
1192 ASN1_PKEY_SIGPARAM_NULL,
1193
1194 "RSA",
1195 "OpenSSL RSA method",
1196
1197 rsa_pub_decode,
1198 rsa_pub_encode,
1199 rsa_pub_cmp,
1200 rsa_pub_print,
1201
1202 rsa_priv_decode,
1203 rsa_priv_encode,
1204 rsa_priv_print,
1205
1206 int_rsa_size,
1207 rsa_bits,
1208 rsa_security_bits,
1209
1210 0, 0, 0, 0, 0, 0,
1211
1212 rsa_sig_print,
1213 int_rsa_free,
1214 rsa_pkey_ctrl,
1215 old_rsa_priv_decode,
1216 old_rsa_priv_encode,
1217 rsa_item_verify,
629e369c 1218 rsa_item_sign,
2aee35d3 1219 rsa_sig_info_set,
29be6023
RL		 1220 rsa_pkey_check,
1221
1222 0, 0,
1223 0, 0, 0, 0,
1224
1225 rsa_pkey_dirty_cnt,
1226 rsa_pkey_export_to
629e369c 1227 },
0f113f3e
MC		 1228
1229 {
1230 EVP_PKEY_RSA2,
1231 EVP_PKEY_RSA,
1232 ASN1_PKEY_ALIAS}
1233};
4e8ba747
DSH		 1234
1235const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1236 EVP_PKEY_RSA_PSS,
1237 EVP_PKEY_RSA_PSS,
1238 ASN1_PKEY_SIGPARAM_NULL,
1239
1240 "RSA-PSS",
1241 "OpenSSL RSA-PSS method",
1242
1243 rsa_pub_decode,
1244 rsa_pub_encode,
1245 rsa_pub_cmp,
1246 rsa_pub_print,
1247
1248 rsa_priv_decode,
1249 rsa_priv_encode,
1250 rsa_priv_print,
1251
1252 int_rsa_size,
1253 rsa_bits,
1254 rsa_security_bits,
1255
1256 0, 0, 0, 0, 0, 0,
1257
1258 rsa_sig_print,
1259 int_rsa_free,
1260 rsa_pkey_ctrl,
1261 0, 0,
1262 rsa_item_verify,
1263 rsa_item_sign,
2aee35d3 1264 0,
29be6023
RL		 1265 rsa_pkey_check,
1266
1267 0, 0,
1268 0, 0, 0, 0,
1269
1270 rsa_pkey_dirty_cnt,
1271 rsa_pkey_export_to
4e8ba747 1272};
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