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RSA: Do not set NULL OAEP labels
[thirdparty/openssl.git] / crypto / rsa / rsa_ameth.c
CommitLineData
0f113f3e 1/*
33388b44 2 * Copyright 2006-2020 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 22#include <openssl/core_names.h>
96ebe52e 23#include <openssl/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 */
484d1a73 46 if (RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK) != RSA_FLAG_TYPE_RSASSAPSS) {
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 103
7674e923 104static int rsa_pub_decode(EVP_PKEY *pkey, const 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 198 }
484d1a73
RL		 199
200 RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
201 switch (pkey->ameth->pkey_id) {
202 case EVP_PKEY_RSA:
203 RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
204 break;
205 case EVP_PKEY_RSA_PSS:
206 RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
207 break;
208 default:
209 /* Leave the type bits zero */
210 break;
211 }
212
42009ae8
DSH		 213 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
214 return 1;
0f113f3e 215}
e4263314 216
6f81892e 217static int int_rsa_size(const EVP_PKEY *pkey)
0f113f3e
MC		 218{
219 return RSA_size(pkey->pkey.rsa);
220}
6f81892e
DSH		 221
222static int rsa_bits(const EVP_PKEY *pkey)
0f113f3e
MC		 223{
224 return BN_num_bits(pkey->pkey.rsa->n);
225}
6f81892e 226
2514fa79 227static int rsa_security_bits(const EVP_PKEY *pkey)
0f113f3e
MC		 228{
229 return RSA_security_bits(pkey->pkey.rsa);
230}
2514fa79 231
6f81892e 232static void int_rsa_free(EVP_PKEY *pkey)
0f113f3e
MC		 233{
234 RSA_free(pkey->pkey.rsa);
235}
35208f36 236
9503ed8b
DSH		 237static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
238{
239 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
240 return NULL;
241 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
242 alg->parameter);
243}
244
245static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
246 int indent)
247{
248 int rv = 0;
249 X509_ALGOR *maskHash = NULL;
52ad523c 250
9503ed8b
DSH		 251 if (!BIO_indent(bp, indent, 128))
252 goto err;
253 if (pss_key) {
254 if (pss == NULL) {
255 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
256 return 0;
257 return 1;
258 } else {
259 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
260 return 0;
261 }
262 } else if (pss == NULL) {
263 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
264 return 0;
265 return 1;
266 }
267 if (BIO_puts(bp, "\n") <= 0)
268 goto err;
269 if (pss_key)
270 indent += 2;
271 if (!BIO_indent(bp, indent, 128))
272 goto err;
273 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
274 goto err;
275
276 if (pss->hashAlgorithm) {
277 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
278 goto err;
90862ab4 279 } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
9503ed8b 280 goto err;
90862ab4 281 }
9503ed8b
DSH		 282
283 if (BIO_puts(bp, "\n") <= 0)
284 goto err;
285
286 if (!BIO_indent(bp, indent, 128))
287 goto err;
288
289 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
290 goto err;
291 if (pss->maskGenAlgorithm) {
292 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
293 goto err;
294 if (BIO_puts(bp, " with ") <= 0)
295 goto err;
296 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
297 if (maskHash != NULL) {
298 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
299 goto err;
90862ab4 300 } else if (BIO_puts(bp, "INVALID") <= 0) {
9503ed8b 301 goto err;
90862ab4
PY		 302 }
303 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
9503ed8b 304 goto err;
90862ab4 305 }
9503ed8b
DSH		 306 BIO_puts(bp, "\n");
307
308 if (!BIO_indent(bp, indent, 128))
309 goto err;
310 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
311 goto err;
312 if (pss->saltLength) {
313 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
314 goto err;
90862ab4 315 } else if (BIO_puts(bp, "14 (default)") <= 0) {
9503ed8b 316 goto err;
90862ab4 317 }
9503ed8b
DSH		 318 BIO_puts(bp, "\n");
319
320 if (!BIO_indent(bp, indent, 128))
321 goto err;
322 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
323 goto err;
324 if (pss->trailerField) {
325 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
326 goto err;
90862ab4 327 } else if (BIO_puts(bp, "BC (default)") <= 0) {
9503ed8b 328 goto err;
90862ab4 329 }
9503ed8b
DSH		 330 BIO_puts(bp, "\n");
331
332 rv = 1;
333
334 err:
335 X509_ALGOR_free(maskHash);
336 return rv;
337
338}
339
340static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
0f113f3e 341{
9503ed8b 342 const RSA *x = pkey->pkey.rsa;
0f113f3e
MC		 343 char *str;
344 const char *s;
665d899f 345 int ret = 0, mod_len = 0, ex_primes;
0f113f3e
MC		 346
347 if (x->n != NULL)
348 mod_len = BN_num_bits(x->n);
665d899f 349 ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
0f113f3e
MC		 350
351 if (!BIO_indent(bp, off, 128))
352 goto err;
353
87ee7b22 354 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
9503ed8b
DSH		 355 goto err;
356
0f113f3e 357 if (priv && x->d) {
665d899f
PY		 358 if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
359 mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
0f113f3e
MC		 360 goto err;
361 str = "modulus:";
362 s = "publicExponent:";
363 } else {
a773b52a 364 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
0f113f3e
MC		 365 goto err;
366 str = "Modulus:";
367 s = "Exponent:";
368 }
a773b52a 369 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
0f113f3e 370 goto err;
a773b52a 371 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
0f113f3e
MC		 372 goto err;
373 if (priv) {
665d899f
PY		 374 int i;
375
a773b52a 376 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
0f113f3e 377 goto err;
a773b52a 378 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
0f113f3e 379 goto err;
a773b52a 380 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
0f113f3e 381 goto err;
a773b52a 382 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
0f113f3e 383 goto err;
a773b52a 384 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
0f113f3e 385 goto err;
a773b52a 386 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
0f113f3e 387 goto err;
665d899f
PY		 388 for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
389 /* print multi-prime info */
390 BIGNUM *bn = NULL;
391 RSA_PRIME_INFO *pinfo;
392 int j;
393
394 pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
395 for (j = 0; j < 3; j++) {
396 if (!BIO_indent(bp, off, 128))
397 goto err;
398 switch (j) {
399 case 0:
400 if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
401 goto err;
402 bn = pinfo->r;
403 break;
404 case 1:
405 if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
406 goto err;
407 bn = pinfo->d;
408 break;
409 case 2:
410 if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
411 goto err;
412 bn = pinfo->t;
413 break;
414 default:
415 break;
416 }
417 if (!ASN1_bn_print(bp, "", bn, NULL, off))
418 goto err;
419 }
420 }
0f113f3e 421 }
87ee7b22 422 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
9503ed8b 423 goto err;
0f113f3e
MC		 424 ret = 1;
425 err:
9503ed8b 426 return ret;
0f113f3e 427}
35208f36
DSH		 428
429static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
0f113f3e
MC		 430 ASN1_PCTX *ctx)
431{
9503ed8b 432 return pkey_rsa_print(bp, pkey, indent, 0);
0f113f3e 433}
35208f36
DSH		 434
435static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
0f113f3e
MC		 436 ASN1_PCTX *ctx)
437{
9503ed8b 438 return pkey_rsa_print(bp, pkey, indent, 1);
0f113f3e 439}
0574cadf 440
6745a1ff 441static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
0f113f3e 442{
0f113f3e
MC		 443 RSA_PSS_PARAMS *pss;
444
e93c8748
DSH		 445 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
446 alg->parameter);
0f113f3e 447
6745a1ff 448 if (pss == NULL)
0f113f3e
MC		 449 return NULL;
450
6745a1ff
DSH		 451 if (pss->maskGenAlgorithm != NULL) {
452 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
453 if (pss->maskHash == NULL) {
454 RSA_PSS_PARAMS_free(pss);
455 return NULL;
456 }
457 }
0f113f3e
MC		 458
459 return pss;
460}
461
ff04bbe3 462static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
0f113f3e
MC		 463 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
464{
ffc6fad5 465 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
0f113f3e 466 int rv;
52ad523c 467 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
c82bafc5 468
9503ed8b 469 rv = rsa_pss_param_print(bp, 0, pss, indent);
25aaa98a 470 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 471 if (!rv)
472 return 0;
a4c467c9 473 } else if (BIO_puts(bp, "\n") <= 0) {
0f113f3e 474 return 0;
52ad523c 475 }
0f113f3e
MC		 476 if (sig)
477 return X509_signature_dump(bp, sig, indent);
478 return 1;
479}
492a9e24
DSH		 480
481static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
0f113f3e
MC		 482{
483 X509_ALGOR *alg = NULL;
9bcc9f97
MC		 484 const EVP_MD *md;
485 const EVP_MD *mgf1md;
486 int min_saltlen;
52ad523c 487
0f113f3e
MC		 488 switch (op) {
489
490 case ASN1_PKEY_CTRL_PKCS7_SIGN:
491 if (arg1 == 0)
492 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
493 break;
494
495 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
53d2260c
DSH		 496 if (pkey_is_pss(pkey))
497 return -2;
0f113f3e
MC		 498 if (arg1 == 0)
499 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
500 break;
8931b30d 501#ifndef OPENSSL_NO_CMS
0f113f3e
MC		 502 case ASN1_PKEY_CTRL_CMS_SIGN:
503 if (arg1 == 0)
504 return rsa_cms_sign(arg2);
505 else if (arg1 == 1)
506 return rsa_cms_verify(arg2);
507 break;
508
509 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
53d2260c
DSH		 510 if (pkey_is_pss(pkey))
511 return -2;
0f113f3e
MC		 512 if (arg1 == 0)
513 return rsa_cms_encrypt(arg2);
514 else if (arg1 == 1)
515 return rsa_cms_decrypt(arg2);
516 break;
517
518 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
53d2260c
DSH		 519 if (pkey_is_pss(pkey))
520 return -2;
0f113f3e
MC		 521 *(int *)arg2 = CMS_RECIPINFO_TRANS;
522 return 1;
8931b30d 523#endif
a78568b7 524
0f113f3e 525 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
9bcc9f97
MC		 526 if (pkey->pkey.rsa->pss != NULL) {
527 if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
528 &min_saltlen)) {
529 RSAerr(0, ERR_R_INTERNAL_ERROR);
530 return 0;
531 }
532 *(int *)arg2 = EVP_MD_type(md);
533 /* Return of 2 indicates this MD is mandatory */
534 return 2;
535 }
0f113f3e
MC		 536 *(int *)arg2 = NID_sha256;
537 return 1;
03919683 538
0f113f3e
MC		 539 default:
540 return -2;
492a9e24 541
0f113f3e 542 }
492a9e24 543
0f113f3e
MC		 544 if (alg)
545 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
4f1aa191 546
0f113f3e 547 return 1;
4f1aa191 548
0f113f3e 549}
492a9e24 550
0574cadf
DSH		 551/* allocate and set algorithm ID from EVP_MD, default SHA1 */
552static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
0f113f3e 553{
47e42b3c 554 if (md == NULL || EVP_MD_type(md) == NID_sha1)
0f113f3e
MC		 555 return 1;
556 *palg = X509_ALGOR_new();
90945fa3 557 if (*palg == NULL)
0f113f3e
MC		 558 return 0;
559 X509_ALGOR_set_md(*palg, md);
560 return 1;
561}
0574cadf
DSH		 562
563/* Allocate and set MGF1 algorithm ID from EVP_MD */
564static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
0f113f3e
MC		 565{
566 X509_ALGOR *algtmp = NULL;
567 ASN1_STRING *stmp = NULL;
52ad523c 568
0f113f3e 569 *palg = NULL;
47e42b3c 570 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
0f113f3e
MC		 571 return 1;
572 /* need to embed algorithm ID inside another */
573 if (!rsa_md_to_algor(&algtmp, mgf1md))
574 goto err;
f291138b 575 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
0f113f3e
MC		 576 goto err;
577 *palg = X509_ALGOR_new();
90945fa3 578 if (*palg == NULL)
0f113f3e
MC		 579 goto err;
580 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
581 stmp = NULL;
582 err:
0dfb9398 583 ASN1_STRING_free(stmp);
222561fe 584 X509_ALGOR_free(algtmp);
0f113f3e
MC		 585 if (*palg)
586 return 1;
587 return 0;
588}
0574cadf
DSH		 589
590/* convert algorithm ID to EVP_MD, default SHA1 */
591static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
0f113f3e
MC		 592{
593 const EVP_MD *md;
52ad523c 594
0f113f3e
MC		 595 if (!alg)
596 return EVP_sha1();
597 md = EVP_get_digestbyobj(alg->algorithm);
598 if (md == NULL)
599 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
600 return md;
601}
602
0f113f3e 603/*
47e42b3c 604 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
0574cadf 605 * suitable for setting an AlgorithmIdentifier.
31904ecd
DSH		 606 */
607
47e42b3c 608static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
0f113f3e
MC		 609{
610 const EVP_MD *sigmd, *mgf1md;
0f113f3e 611 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
9767a3dc 612 RSA *rsa = EVP_PKEY_get0_RSA(pk);
47e42b3c 613 int saltlen;
52ad523c 614
0f113f3e 615 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
47e42b3c 616 return NULL;
0f113f3e 617 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
47e42b3c 618 return NULL;
0f113f3e 619 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
47e42b3c 620 return NULL;
90862ab4 621 if (saltlen == -1) {
0f113f3e 622 saltlen = EVP_MD_size(sigmd);
491360e7 623 } else if (saltlen == -2 || saltlen == -3) {
9767a3dc 624 saltlen = RSA_size(rsa) - EVP_MD_size(sigmd) - 2;
137096a7 625 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
0f113f3e 626 saltlen--;
491360e7
BE		 627 if (saltlen < 0)
628 return NULL;
0f113f3e 629 }
47e42b3c
DSH		 630
631 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
632}
633
634RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
635 const EVP_MD *mgf1md, int saltlen)
636{
637 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
52ad523c 638
90945fa3 639 if (pss == NULL)
0f113f3e
MC		 640 goto err;
641 if (saltlen != 20) {
642 pss->saltLength = ASN1_INTEGER_new();
90945fa3 643 if (pss->saltLength == NULL)
0f113f3e
MC		 644 goto err;
645 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
646 goto err;
647 }
648 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
649 goto err;
47e42b3c 650 if (mgf1md == NULL)
b6b885c6 651 mgf1md = sigmd;
0f113f3e
MC		 652 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
653 goto err;
74753357
DSH		 654 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
655 goto err;
47e42b3c 656 return pss;
0f113f3e 657 err:
25aaa98a 658 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 659 return NULL;
660}
661
47e42b3c
DSH		 662static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
663{
664 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
f291138b 665 ASN1_STRING *os;
52ad523c 666
47e42b3c
DSH		 667 if (pss == NULL)
668 return NULL;
669
f291138b 670 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
47e42b3c
DSH		 671 RSA_PSS_PARAMS_free(pss);
672 return os;
673}
674
0f113f3e
MC		 675/*
676 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
0d4fb843 677 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
0f113f3e 678 * passed to pkctx instead.
0574cadf 679 */
31904ecd 680
0574cadf 681static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
0f113f3e
MC		 682 X509_ALGOR *sigalg, EVP_PKEY *pkey)
683{
684 int rv = -1;
685 int saltlen;
686 const EVP_MD *mgf1md = NULL, *md = NULL;
687 RSA_PSS_PARAMS *pss;
52ad523c 688
0f113f3e 689 /* Sanity check: make sure it is PSS */
ffc6fad5 690 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
0f113f3e
MC		 691 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
692 return -1;
693 }
694 /* Decode PSS parameters */
6745a1ff 695 pss = rsa_pss_decode(sigalg);
0f113f3e 696
cfd81c6d 697 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
0f113f3e
MC		 698 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
699 goto err;
700 }
0f113f3e
MC		 701
702 /* We have all parameters now set up context */
0f113f3e
MC		 703 if (pkey) {
704 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
705 goto err;
706 } else {
707 const EVP_MD *checkmd;
708 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
709 goto err;
710 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
711 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
712 goto err;
713 }
714 }
715
716 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
717 goto err;
718
719 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
720 goto err;
721
722 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
723 goto err;
724 /* Carry on */
725 rv = 1;
726
727 err:
728 RSA_PSS_PARAMS_free(pss);
0f113f3e
MC		 729 return rv;
730}
492a9e24 731
cfd81c6d
DSH		 732int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
733 const EVP_MD **pmgf1md, int *psaltlen)
734{
735 if (pss == NULL)
736 return 0;
737 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
738 if (*pmd == NULL)
739 return 0;
740 *pmgf1md = rsa_algor_to_md(pss->maskHash);
741 if (*pmgf1md == NULL)
742 return 0;
743 if (pss->saltLength) {
744 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
745 if (*psaltlen < 0) {
746 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
747 return 0;
748 }
c82bafc5 749 } else {
cfd81c6d 750 *psaltlen = 20;
c82bafc5 751 }
cfd81c6d
DSH		 752
753 /*
754 * low-level routines support only trailer field 0xbc (value 1) and
755 * PKCS#1 says we should reject any other value anyway.
756 */
757 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
758 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
b6b885c6 759 return 0;
cfd81c6d
DSH		 760 }
761
762 return 1;
763}
764
e968561d 765#ifndef OPENSSL_NO_CMS
0574cadf 766static int rsa_cms_verify(CMS_SignerInfo *si)
0f113f3e
MC		 767{
768 int nid, nid2;
769 X509_ALGOR *alg;
770 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
52ad523c 771
0f113f3e
MC		 772 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
773 nid = OBJ_obj2nid(alg->algorithm);
ffc6fad5 774 if (nid == EVP_PKEY_RSA_PSS)
0f113f3e 775 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
08be0331
DSH		 776 /* Only PSS allowed for PSS keys */
777 if (pkey_ctx_is_pss(pkctx)) {
778 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
779 return 0;
780 }
781 if (nid == NID_rsaEncryption)
782 return 1;
0f113f3e
MC		 783 /* Workaround for some implementation that use a signature OID */
784 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
785 if (nid2 == NID_rsaEncryption)
786 return 1;
787 }
788 return 0;
789}
e968561d 790#endif
0f113f3e
MC		 791
792/*
793 * Customised RSA item verification routine. This is called when a signature
794 * is encountered requiring special handling. We currently only handle PSS.
0574cadf
DSH		 795 */
796
0574cadf 797static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
0f113f3e
MC		 798 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
799 EVP_PKEY *pkey)
800{
801 /* Sanity check: make sure it is PSS */
ffc6fad5 802 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
0f113f3e
MC		 803 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
804 return -1;
805 }
09f06923 806 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
0f113f3e
MC		 807 /* Carry on */
808 return 2;
09f06923 809 }
0f113f3e
MC		 810 return -1;
811}
0574cadf 812
e968561d 813#ifndef OPENSSL_NO_CMS
0574cadf 814static int rsa_cms_sign(CMS_SignerInfo *si)
0f113f3e
MC		 815{
816 int pad_mode = RSA_PKCS1_PADDING;
817 X509_ALGOR *alg;
818 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
819 ASN1_STRING *os = NULL;
52ad523c 820
0f113f3e
MC		 821 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
822 if (pkctx) {
823 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
824 return 0;
825 }
826 if (pad_mode == RSA_PKCS1_PADDING) {
827 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
828 return 1;
829 }
830 /* We don't support it */
831 if (pad_mode != RSA_PKCS1_PSS_PADDING)
832 return 0;
47e42b3c 833 os = rsa_ctx_to_pss_string(pkctx);
0f113f3e
MC		 834 if (!os)
835 return 0;
ffc6fad5 836 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
0f113f3e
MC		 837 return 1;
838}
e968561d 839#endif
0574cadf 840
17c63d1c 841static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
0f113f3e
MC		 842 X509_ALGOR *alg1, X509_ALGOR *alg2,
843 ASN1_BIT_STRING *sig)
844{
845 int pad_mode;
6e59a892 846 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
52ad523c 847
0f113f3e
MC		 848 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
849 return 0;
850 if (pad_mode == RSA_PKCS1_PADDING)
851 return 2;
852 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
853 ASN1_STRING *os1 = NULL;
47e42b3c 854 os1 = rsa_ctx_to_pss_string(pkctx);
0f113f3e
MC		 855 if (!os1)
856 return 0;
857 /* Duplicate parameters if we have to */
858 if (alg2) {
859 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
860 if (!os2) {
861 ASN1_STRING_free(os1);
862 return 0;
863 }
ffc6fad5 864 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
0f113f3e
MC		 865 V_ASN1_SEQUENCE, os2);
866 }
ffc6fad5 867 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
0f113f3e
MC		 868 V_ASN1_SEQUENCE, os1);
869 return 3;
870 }
871 return 2;
872}
17c63d1c 873
629e369c
DSH		 874static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
875 const ASN1_STRING *sig)
876{
877 int rv = 0;
878 int mdnid, saltlen;
879 uint32_t flags;
880 const EVP_MD *mgf1md = NULL, *md = NULL;
881 RSA_PSS_PARAMS *pss;
b744f915 882 int secbits;
629e369c
DSH		 883
884 /* Sanity check: make sure it is PSS */
885 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
886 return 0;
887 /* Decode PSS parameters */
888 pss = rsa_pss_decode(sigalg);
889 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
890 goto err;
891 mdnid = EVP_MD_type(md);
892 /*
893 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
894 * match and salt length must equal digest size
895 */
896 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
897 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
898 flags = X509_SIG_INFO_TLS;
899 else
900 flags = 0;
901 /* Note: security bits half number of digest bits */
b744f915
KR		 902 secbits = EVP_MD_size(md) * 4;
903 /*
904 * SHA1 and MD5 are known to be broken. Reduce security bits so that
905 * they're no longer accepted at security level 1. The real values don't
906 * really matter as long as they're lower than 80, which is our security
907 * level 1.
908 * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for SHA1 at
909 * 2^63.4
910 * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
911 * puts a chosen-prefix attack for MD5 at 2^39.
912 */
913 if (mdnid == NID_sha1)
914 secbits = 64;
915 else if (mdnid == NID_md5_sha1)
916 secbits = 68;
917 else if (mdnid == NID_md5)
918 secbits = 39;
919 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, secbits,
629e369c
DSH		 920 flags);
921 rv = 1;
922 err:
923 RSA_PSS_PARAMS_free(pss);
924 return rv;
925}
926
e968561d 927#ifndef OPENSSL_NO_CMS
6745a1ff 928static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
0f113f3e 929{
6745a1ff 930 RSA_OAEP_PARAMS *oaep;
0574cadf 931
6745a1ff 932 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
52ad523c 933 alg->parameter);
0574cadf 934
6745a1ff 935 if (oaep == NULL)
0f113f3e 936 return NULL;
0574cadf 937
6745a1ff
DSH		 938 if (oaep->maskGenFunc != NULL) {
939 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
940 if (oaep->maskHash == NULL) {
941 RSA_OAEP_PARAMS_free(oaep);
942 return NULL;
943 }
944 }
945 return oaep;
0f113f3e 946}
0574cadf
DSH		 947
948static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
0f113f3e
MC		 949{
950 EVP_PKEY_CTX *pkctx;
951 X509_ALGOR *cmsalg;
952 int nid;
953 int rv = -1;
954 unsigned char *label = NULL;
955 int labellen = 0;
956 const EVP_MD *mgf1md = NULL, *md = NULL;
957 RSA_OAEP_PARAMS *oaep;
52ad523c 958
0f113f3e 959 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
52ad523c 960 if (pkctx == NULL)
0f113f3e
MC		 961 return 0;
962 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
963 return -1;
964 nid = OBJ_obj2nid(cmsalg->algorithm);
965 if (nid == NID_rsaEncryption)
966 return 1;
967 if (nid != NID_rsaesOaep) {
968 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
969 return -1;
970 }
971 /* Decode OAEP parameters */
6745a1ff 972 oaep = rsa_oaep_decode(cmsalg);
0f113f3e
MC		 973
974 if (oaep == NULL) {
975 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
976 goto err;
977 }
978
6745a1ff 979 mgf1md = rsa_algor_to_md(oaep->maskHash);
52ad523c 980 if (mgf1md == NULL)
0f113f3e
MC		 981 goto err;
982 md = rsa_algor_to_md(oaep->hashFunc);
52ad523c 983 if (md == NULL)
0f113f3e
MC		 984 goto err;
985
52ad523c 986 if (oaep->pSourceFunc != NULL) {
0f113f3e 987 X509_ALGOR *plab = oaep->pSourceFunc;
52ad523c 988
0f113f3e
MC		 989 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
990 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
991 goto err;
992 }
993 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
994 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
995 goto err;
996 }
997
998 label = plab->parameter->value.octet_string->data;
999 /* Stop label being freed when OAEP parameters are freed */
1000 plab->parameter->value.octet_string->data = NULL;
1001 labellen = plab->parameter->value.octet_string->length;
1002 }
1003
1004 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
1005 goto err;
1006 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
1007 goto err;
1008 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
1009 goto err;
9c44916c
BK		 1010 if (label != NULL
1011 && EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
0f113f3e
MC		 1012 goto err;
1013 /* Carry on */
1014 rv = 1;
1015
1016 err:
1017 RSA_OAEP_PARAMS_free(oaep);
0f113f3e
MC		 1018 return rv;
1019}
0574cadf
DSH		 1020
1021static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
0f113f3e
MC		 1022{
1023 const EVP_MD *md, *mgf1md;
1024 RSA_OAEP_PARAMS *oaep = NULL;
1025 ASN1_STRING *os = NULL;
1026 X509_ALGOR *alg;
1027 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
1028 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
1029 unsigned char *label;
52ad523c 1030
178989b4
BS		 1031 if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
1032 return 0;
0f113f3e
MC		 1033 if (pkctx) {
1034 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
1035 return 0;
1036 }
1037 if (pad_mode == RSA_PKCS1_PADDING) {
1038 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
1039 return 1;
1040 }
1041 /* Not supported */
1042 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
1043 return 0;
1044 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
1045 goto err;
1046 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
1047 goto err;
1048 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
1049 if (labellen < 0)
1050 goto err;
1051 oaep = RSA_OAEP_PARAMS_new();
90945fa3 1052 if (oaep == NULL)
0f113f3e
MC		 1053 goto err;
1054 if (!rsa_md_to_algor(&oaep->hashFunc, md))
1055 goto err;
1056 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1057 goto err;
1058 if (labellen > 0) {
5e8129f2 1059 ASN1_OCTET_STRING *los;
0f113f3e 1060 oaep->pSourceFunc = X509_ALGOR_new();
90945fa3 1061 if (oaep->pSourceFunc == NULL)
0f113f3e 1062 goto err;
5e8129f2 1063 los = ASN1_OCTET_STRING_new();
90945fa3 1064 if (los == NULL)
0f113f3e
MC		 1065 goto err;
1066 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1067 ASN1_OCTET_STRING_free(los);
1068 goto err;
1069 }
1070 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1071 V_ASN1_OCTET_STRING, los);
1072 }
1073 /* create string with pss parameter encoding. */
1074 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1075 goto err;
1076 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1077 os = NULL;
1078 rv = 1;
1079 err:
25aaa98a 1080 RSA_OAEP_PARAMS_free(oaep);
0dfb9398 1081 ASN1_STRING_free(os);
0f113f3e
MC		 1082 return rv;
1083}
e968561d 1084#endif
0f113f3e 1085
2aee35d3
PY		 1086static int rsa_pkey_check(const EVP_PKEY *pkey)
1087{
1088 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1089}
1090
29be6023
RL		 1091static size_t rsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
1092{
1093 return pkey->pkey.rsa->dirty_cnt;
1094}
1095
967cc3f9
RL		 1096/*
1097 * For the moment, we trust the call path, where keys going through
1098 * rsa_pkey_export_to() match a KEYMGMT for the "RSA" keytype, while
1099 * keys going through rsa_pss_pkey_export_to() match a KEYMGMT for the
1100 * "RSA-PSS" keytype.
1101 * TODO(3.0) Investigate whether we should simply continue to trust the
1102 * call path, or if we should strengthen this function by checking that
1103 * |rsa_type| matches the RSA key subtype. The latter requires ensuring
1104 * that the type flag for the RSA key is properly set by other functions
1105 * in this file.
1106 */
1107static int rsa_int_export_to(const EVP_PKEY *from, int rsa_type,
1108 void *to_keydata, EVP_KEYMGMT *to_keymgmt,
1109 OPENSSL_CTX *libctx, const char *propq)
29be6023 1110{
b305452f 1111 RSA *rsa = from->pkey.rsa;
6d4e6009 1112 OSSL_PARAM_BLD *tmpl = OSSL_PARAM_BLD_new();
29be6023 1113 OSSL_PARAM *params = NULL;
0996cff9 1114 int selection = 0;
b305452f 1115 int rv = 0;
29be6023 1116
6d4e6009
P		 1117 if (tmpl == NULL)
1118 return 0;
df13defd
RL		 1119 /*
1120 * If the RSA method is foreign, then we can't be sure of anything, and
1121 * can therefore not export or pretend to export.
1122 */
1123 if (RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
6d4e6009 1124 goto err;
df13defd 1125
b305452f 1126 /* Public parameters must always be present */
645a541a 1127 if (RSA_get0_n(rsa) == NULL || RSA_get0_e(rsa) == NULL)
29be6023
RL		 1128 goto err;
1129
645a541a 1130 if (!rsa_todata(rsa, tmpl, NULL))
29be6023 1131 goto err;
b305452f 1132
645a541a
RL		 1133 selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
1134 if (RSA_get0_d(rsa) != NULL)
0996cff9 1135 selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
29be6023 1136
967cc3f9
RL		 1137 if (rsa->pss != NULL) {
1138 const EVP_MD *md = NULL, *mgf1md = NULL;
1139 int md_nid, mgf1md_nid, saltlen;
1140 RSA_PSS_PARAMS_30 pss_params;
1141
1142 if (!rsa_pss_get_param(rsa->pss, &md, &mgf1md, &saltlen))
1143 goto err;
1144 md_nid = EVP_MD_type(md);
1145 mgf1md_nid = EVP_MD_type(mgf1md);
1146 if (!rsa_pss_params_30_set_defaults(&pss_params)
1147 || !rsa_pss_params_30_set_hashalg(&pss_params, md_nid)
1148 || !rsa_pss_params_30_set_maskgenhashalg(&pss_params, mgf1md_nid)
1149 || !rsa_pss_params_30_set_saltlen(&pss_params, saltlen)
1150 || !rsa_pss_params_30_todata(&pss_params, propq, tmpl, NULL))
1151 goto err;
1152 selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
29be6023
RL		 1153 }
1154
6d4e6009 1155 if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
29be6023
RL		 1156 goto err;
1157
1158 /* We export, the provider imports */
0996cff9 1159 rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params);
29be6023
RL		 1160
1161 err:
6d4e6009
P		 1162 OSSL_PARAM_BLD_free_params(params);
1163 OSSL_PARAM_BLD_free(tmpl);
b305452f 1164 return rv;
29be6023
RL		 1165}
1166
967cc3f9
RL		 1167static int rsa_int_import_from(const OSSL_PARAM params[], void *vpctx,
1168 int rsa_type)
0abae163 1169{
629c72db
MC		 1170 EVP_PKEY_CTX *pctx = vpctx;
1171 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
1172 RSA *rsa = rsa_new_with_ctx(pctx->libctx);
967cc3f9
RL		 1173 RSA_PSS_PARAMS_30 rsa_pss_params = { 0, };
1174 int ok = 0;
0abae163
RL		 1175
1176 if (rsa == NULL) {
1177 ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
1178 return 0;
1179 }
1180
967cc3f9
RL		 1181 RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
1182 RSA_set_flags(rsa, rsa_type);
1183
1184 if (!rsa_pss_params_30_fromdata(&rsa_pss_params, params, pctx->libctx))
1185 goto err;
1186
1187 switch (rsa_type) {
1188 case RSA_FLAG_TYPE_RSA:
1189 /*
1190 * Were PSS parameters filled in?
1191 * In that case, something's wrong
1192 */
1193 if (!rsa_pss_params_30_is_unrestricted(&rsa_pss_params))
1194 goto err;
1195 break;
1196 case RSA_FLAG_TYPE_RSASSAPSS:
1197 /*
1198 * Were PSS parameters filled in? In that case, create the old
1199 * RSA_PSS_PARAMS structure. Otherwise, this is an unrestricted key.
1200 */
1201 if (!rsa_pss_params_30_is_unrestricted(&rsa_pss_params)) {
1202 /* Create the older RSA_PSS_PARAMS from RSA_PSS_PARAMS_30 data */
1203 int mdnid = rsa_pss_params_30_hashalg(&rsa_pss_params);
1204 int mgf1mdnid = rsa_pss_params_30_maskgenhashalg(&rsa_pss_params);
1205 int saltlen = rsa_pss_params_30_saltlen(&rsa_pss_params);
1206 const EVP_MD *md = EVP_get_digestbynid(mdnid);
1207 const EVP_MD *mgf1md = EVP_get_digestbynid(mgf1mdnid);
1208
1209 if ((rsa->pss = rsa_pss_params_create(md, mgf1md, saltlen)) == NULL)
1210 goto err;
1211 }
1212 break;
1213 default:
1214 /* RSA key sub-types we don't know how to handle yet */
1215 goto err;
0abae163 1216 }
967cc3f9
RL		 1217
1218 if (!rsa_fromdata(rsa, params))
1219 goto err;
1220
1221 switch (rsa_type) {
1222 case RSA_FLAG_TYPE_RSA:
1223 ok = EVP_PKEY_assign_RSA(pkey, rsa);
1224 break;
1225 case RSA_FLAG_TYPE_RSASSAPSS:
1226 ok = EVP_PKEY_assign(pkey, EVP_PKEY_RSA_PSS, rsa);
1227 break;
1228 }
1229
1230 err:
1231 if (!ok)
1232 RSA_free(rsa);
1233 return ok;
1234}
1235
1236static int rsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1237 EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx,
1238 const char *propq)
1239{
1240 return rsa_int_export_to(from, RSA_FLAG_TYPE_RSA, to_keydata,
1241 to_keymgmt, libctx, propq);
1242}
1243
1244static int rsa_pss_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1245 EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx,
1246 const char *propq)
1247{
1248 return rsa_int_export_to(from, RSA_FLAG_TYPE_RSASSAPSS, to_keydata,
1249 to_keymgmt, libctx, propq);
1250}
1251
1252static int rsa_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
1253{
1254 return rsa_int_import_from(params, vpctx, RSA_FLAG_TYPE_RSA);
1255}
1256
1257static int rsa_pss_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
1258{
1259 return rsa_int_import_from(params, vpctx, RSA_FLAG_TYPE_RSASSAPSS);
0abae163
RL		 1260}
1261
578b5514 1262const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
0f113f3e
MC		 1263 {
1264 EVP_PKEY_RSA,
1265 EVP_PKEY_RSA,
1266 ASN1_PKEY_SIGPARAM_NULL,
1267
1268 "RSA",
1269 "OpenSSL RSA method",
1270
1271 rsa_pub_decode,
1272 rsa_pub_encode,
1273 rsa_pub_cmp,
1274 rsa_pub_print,
1275
1276 rsa_priv_decode,
1277 rsa_priv_encode,
1278 rsa_priv_print,
1279
1280 int_rsa_size,
1281 rsa_bits,
1282 rsa_security_bits,
1283
1284 0, 0, 0, 0, 0, 0,
1285
1286 rsa_sig_print,
1287 int_rsa_free,
1288 rsa_pkey_ctrl,
1289 old_rsa_priv_decode,
1290 old_rsa_priv_encode,
1291 rsa_item_verify,
629e369c 1292 rsa_item_sign,
2aee35d3 1293 rsa_sig_info_set,
29be6023
RL		 1294 rsa_pkey_check,
1295
1296 0, 0,
1297 0, 0, 0, 0,
1298
1299 rsa_pkey_dirty_cnt,
0abae163
RL		 1300 rsa_pkey_export_to,
1301 rsa_pkey_import_from
629e369c 1302 },
0f113f3e
MC		 1303
1304 {
1305 EVP_PKEY_RSA2,
1306 EVP_PKEY_RSA,
1307 ASN1_PKEY_ALIAS}
1308};
4e8ba747
DSH		 1309
1310const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1311 EVP_PKEY_RSA_PSS,
1312 EVP_PKEY_RSA_PSS,
1313 ASN1_PKEY_SIGPARAM_NULL,
1314
1315 "RSA-PSS",
1316 "OpenSSL RSA-PSS method",
1317
1318 rsa_pub_decode,
1319 rsa_pub_encode,
1320 rsa_pub_cmp,
1321 rsa_pub_print,
1322
1323 rsa_priv_decode,
1324 rsa_priv_encode,
1325 rsa_priv_print,
1326
1327 int_rsa_size,
1328 rsa_bits,
1329 rsa_security_bits,
1330
1331 0, 0, 0, 0, 0, 0,
1332
1333 rsa_sig_print,
1334 int_rsa_free,
1335 rsa_pkey_ctrl,
1336 0, 0,
1337 rsa_item_verify,
1338 rsa_item_sign,
2aee35d3 1339 0,
29be6023
RL		 1340 rsa_pkey_check,
1341
1342 0, 0,
1343 0, 0, 0, 0,
1344
1345 rsa_pkey_dirty_cnt,
967cc3f9
RL		 1346 rsa_pss_pkey_export_to,
1347 rsa_pss_pkey_import_from
4e8ba747 1348};
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