2 * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
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
11 #include "internal/cryptlib.h"
12 #include <openssl/asn1t.h>
13 #include <openssl/x509.h>
14 #include <openssl/bn.h>
15 #include <openssl/cms.h>
16 #include "internal/asn1_int.h"
17 #include "internal/evp_int.h"
20 #ifndef OPENSSL_NO_CMS
21 static int rsa_cms_sign(CMS_SignerInfo *si);
22 static int rsa_cms_verify(CMS_SignerInfo *si);
23 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
24 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
27 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
29 /* Set any parameters associated with pkey */
30 static int rsa_param_encode(const EVP_PKEY *pkey,
31 ASN1_STRING **pstr, int *pstrtype)
33 const RSA *rsa = pkey->pkey.rsa;
36 /* If RSA it's just NULL type */
37 if (pkey->ameth->pkey_id == EVP_PKEY_RSA) {
38 *pstrtype = V_ASN1_NULL;
41 /* If no PSS parameters we omit parameters entirely */
42 if (rsa->pss == NULL) {
43 *pstrtype = V_ASN1_UNDEF;
46 /* Encode PSS parameters */
47 if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
50 *pstrtype = V_ASN1_SEQUENCE;
53 /* Decode any parameters and set them in RSA structure */
54 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
56 const ASN1_OBJECT *algoid;
60 X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
61 if (OBJ_obj2nid(algoid) == EVP_PKEY_RSA)
63 if (algptype == V_ASN1_UNDEF)
65 if (algptype != V_ASN1_SEQUENCE) {
66 RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
69 rsa->pss = rsa_pss_decode(alg);
75 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
77 unsigned char *penc = NULL;
82 if (!rsa_param_encode(pkey, &str, &strtype))
84 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
87 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
88 strtype, str, penc, penclen))
95 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
97 const unsigned char *p;
102 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
104 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
105 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
108 if (!rsa_param_decode(rsa, alg)) {
112 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
116 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
118 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
119 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
124 static int old_rsa_priv_decode(EVP_PKEY *pkey,
125 const unsigned char **pder, int derlen)
129 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
130 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
133 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
137 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
139 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
142 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
144 unsigned char *rk = NULL;
149 if (!rsa_param_encode(pkey, &str, &strtype))
151 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
154 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
155 ASN1_STRING_free(str);
159 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
160 strtype, str, rk, rklen)) {
161 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
162 ASN1_STRING_free(str);
169 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
171 const unsigned char *p;
174 const X509_ALGOR *alg;
176 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
178 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
180 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
183 if (!rsa_param_decode(rsa, alg)) {
187 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
191 static int int_rsa_size(const EVP_PKEY *pkey)
193 return RSA_size(pkey->pkey.rsa);
196 static int rsa_bits(const EVP_PKEY *pkey)
198 return BN_num_bits(pkey->pkey.rsa->n);
201 static int rsa_security_bits(const EVP_PKEY *pkey)
203 return RSA_security_bits(pkey->pkey.rsa);
206 static void int_rsa_free(EVP_PKEY *pkey)
208 RSA_free(pkey->pkey.rsa);
211 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
213 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
215 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
219 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
223 X509_ALGOR *maskHash = NULL;
225 if (!BIO_indent(bp, indent, 128))
229 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
233 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
236 } else if (pss == NULL) {
237 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
241 if (BIO_puts(bp, "\n") <= 0)
245 if (!BIO_indent(bp, indent, 128))
247 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
250 if (pss->hashAlgorithm) {
251 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
253 } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
257 if (BIO_puts(bp, "\n") <= 0)
260 if (!BIO_indent(bp, indent, 128))
263 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
265 if (pss->maskGenAlgorithm) {
266 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
268 if (BIO_puts(bp, " with ") <= 0)
270 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
271 if (maskHash != NULL) {
272 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
274 } else if (BIO_puts(bp, "INVALID") <= 0) {
277 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
282 if (!BIO_indent(bp, indent, 128))
284 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
286 if (pss->saltLength) {
287 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
289 } else if (BIO_puts(bp, "14 (default)") <= 0) {
294 if (!BIO_indent(bp, indent, 128))
296 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
298 if (pss->trailerField) {
299 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
301 } else if (BIO_puts(bp, "BC (default)") <= 0) {
309 X509_ALGOR_free(maskHash);
314 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
316 const RSA *x = pkey->pkey.rsa;
319 int ret = 0, mod_len = 0, ex_primes;
322 mod_len = BN_num_bits(x->n);
323 ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
325 if (!BIO_indent(bp, off, 128))
328 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
332 if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
333 mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
336 s = "publicExponent:";
338 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
343 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
345 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
350 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
352 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
354 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
356 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
358 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
360 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
362 for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
363 /* print multi-prime info */
365 RSA_PRIME_INFO *pinfo;
368 pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
369 for (j = 0; j < 3; j++) {
370 if (!BIO_indent(bp, off, 128))
374 if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
379 if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
384 if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
391 if (!ASN1_bn_print(bp, "", bn, NULL, off))
396 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
403 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
406 return pkey_rsa_print(bp, pkey, indent, 0);
409 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
412 return pkey_rsa_print(bp, pkey, indent, 1);
415 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
419 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
425 if (pss->maskGenAlgorithm != NULL) {
426 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
427 if (pss->maskHash == NULL) {
428 RSA_PSS_PARAMS_free(pss);
436 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
437 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
439 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
441 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
443 rv = rsa_pss_param_print(bp, 0, pss, indent);
444 RSA_PSS_PARAMS_free(pss);
447 } else if (!sig && BIO_puts(bp, "\n") <= 0) {
451 return X509_signature_dump(bp, sig, indent);
455 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
457 X509_ALGOR *alg = NULL;
461 case ASN1_PKEY_CTRL_PKCS7_SIGN:
463 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
466 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
467 if (pkey_is_pss(pkey))
470 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
472 #ifndef OPENSSL_NO_CMS
473 case ASN1_PKEY_CTRL_CMS_SIGN:
475 return rsa_cms_sign(arg2);
477 return rsa_cms_verify(arg2);
480 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
481 if (pkey_is_pss(pkey))
484 return rsa_cms_encrypt(arg2);
486 return rsa_cms_decrypt(arg2);
489 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
490 if (pkey_is_pss(pkey))
492 *(int *)arg2 = CMS_RECIPINFO_TRANS;
496 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
497 *(int *)arg2 = NID_sha256;
506 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
512 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
513 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
515 if (md == NULL || EVP_MD_type(md) == NID_sha1)
517 *palg = X509_ALGOR_new();
520 X509_ALGOR_set_md(*palg, md);
524 /* Allocate and set MGF1 algorithm ID from EVP_MD */
525 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
527 X509_ALGOR *algtmp = NULL;
528 ASN1_STRING *stmp = NULL;
531 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
533 /* need to embed algorithm ID inside another */
534 if (!rsa_md_to_algor(&algtmp, mgf1md))
536 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
538 *palg = X509_ALGOR_new();
541 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
544 ASN1_STRING_free(stmp);
545 X509_ALGOR_free(algtmp);
551 /* convert algorithm ID to EVP_MD, default SHA1 */
552 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
558 md = EVP_get_digestbyobj(alg->algorithm);
560 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
565 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
566 * suitable for setting an AlgorithmIdentifier.
569 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
571 const EVP_MD *sigmd, *mgf1md;
572 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
575 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
577 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
579 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
582 saltlen = EVP_MD_size(sigmd);
583 } else if (saltlen == -2) {
584 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
585 if ((EVP_PKEY_bits(pk) & 0x7) == 1)
589 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
592 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
593 const EVP_MD *mgf1md, int saltlen)
595 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
600 pss->saltLength = ASN1_INTEGER_new();
601 if (pss->saltLength == NULL)
603 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
606 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
610 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
612 if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
616 RSA_PSS_PARAMS_free(pss);
620 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
622 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
628 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
629 RSA_PSS_PARAMS_free(pss);
634 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
635 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
636 * passed to pkctx instead.
639 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
640 X509_ALGOR *sigalg, EVP_PKEY *pkey)
644 const EVP_MD *mgf1md = NULL, *md = NULL;
647 /* Sanity check: make sure it is PSS */
648 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
649 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
652 /* Decode PSS parameters */
653 pss = rsa_pss_decode(sigalg);
655 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
656 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
660 /* We have all parameters now set up context */
662 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
665 const EVP_MD *checkmd;
666 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
668 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
669 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
674 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
677 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
680 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
686 RSA_PSS_PARAMS_free(pss);
690 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
691 const EVP_MD **pmgf1md, int *psaltlen)
695 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
698 *pmgf1md = rsa_algor_to_md(pss->maskHash);
699 if (*pmgf1md == NULL)
701 if (pss->saltLength) {
702 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
704 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
712 * low-level routines support only trailer field 0xbc (value 1) and
713 * PKCS#1 says we should reject any other value anyway.
715 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
716 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
723 #ifndef OPENSSL_NO_CMS
724 static int rsa_cms_verify(CMS_SignerInfo *si)
728 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
730 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
731 nid = OBJ_obj2nid(alg->algorithm);
732 if (nid == EVP_PKEY_RSA_PSS)
733 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
734 /* Only PSS allowed for PSS keys */
735 if (pkey_ctx_is_pss(pkctx)) {
736 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
739 if (nid == NID_rsaEncryption)
741 /* Workaround for some implementation that use a signature OID */
742 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
743 if (nid2 == NID_rsaEncryption)
751 * Customised RSA item verification routine. This is called when a signature
752 * is encountered requiring special handling. We currently only handle PSS.
755 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
756 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
759 /* Sanity check: make sure it is PSS */
760 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
761 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
764 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
771 #ifndef OPENSSL_NO_CMS
772 static int rsa_cms_sign(CMS_SignerInfo *si)
774 int pad_mode = RSA_PKCS1_PADDING;
776 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
777 ASN1_STRING *os = NULL;
779 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
781 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
784 if (pad_mode == RSA_PKCS1_PADDING) {
785 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
788 /* We don't support it */
789 if (pad_mode != RSA_PKCS1_PSS_PADDING)
791 os = rsa_ctx_to_pss_string(pkctx);
794 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
799 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
800 X509_ALGOR *alg1, X509_ALGOR *alg2,
801 ASN1_BIT_STRING *sig)
804 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
806 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
808 if (pad_mode == RSA_PKCS1_PADDING)
810 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
811 ASN1_STRING *os1 = NULL;
812 os1 = rsa_ctx_to_pss_string(pkctx);
815 /* Duplicate parameters if we have to */
817 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
819 ASN1_STRING_free(os1);
822 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
823 V_ASN1_SEQUENCE, os2);
825 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
826 V_ASN1_SEQUENCE, os1);
832 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
833 const ASN1_STRING *sig)
838 const EVP_MD *mgf1md = NULL, *md = NULL;
841 /* Sanity check: make sure it is PSS */
842 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
844 /* Decode PSS parameters */
845 pss = rsa_pss_decode(sigalg);
846 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
848 mdnid = EVP_MD_type(md);
850 * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
851 * match and salt length must equal digest size
853 if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
854 && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
855 flags = X509_SIG_INFO_TLS;
858 /* Note: security bits half number of digest bits */
859 X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, EVP_MD_size(md) * 4,
863 RSA_PSS_PARAMS_free(pss);
867 #ifndef OPENSSL_NO_CMS
868 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
870 RSA_OAEP_PARAMS *oaep;
872 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
878 if (oaep->maskGenFunc != NULL) {
879 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
880 if (oaep->maskHash == NULL) {
881 RSA_OAEP_PARAMS_free(oaep);
888 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
894 unsigned char *label = NULL;
896 const EVP_MD *mgf1md = NULL, *md = NULL;
897 RSA_OAEP_PARAMS *oaep;
899 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
902 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
904 nid = OBJ_obj2nid(cmsalg->algorithm);
905 if (nid == NID_rsaEncryption)
907 if (nid != NID_rsaesOaep) {
908 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
911 /* Decode OAEP parameters */
912 oaep = rsa_oaep_decode(cmsalg);
915 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
919 mgf1md = rsa_algor_to_md(oaep->maskHash);
922 md = rsa_algor_to_md(oaep->hashFunc);
926 if (oaep->pSourceFunc != NULL) {
927 X509_ALGOR *plab = oaep->pSourceFunc;
929 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
930 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
933 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
934 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
938 label = plab->parameter->value.octet_string->data;
939 /* Stop label being freed when OAEP parameters are freed */
940 plab->parameter->value.octet_string->data = NULL;
941 labellen = plab->parameter->value.octet_string->length;
944 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
946 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
948 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
950 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
956 RSA_OAEP_PARAMS_free(oaep);
960 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
962 const EVP_MD *md, *mgf1md;
963 RSA_OAEP_PARAMS *oaep = NULL;
964 ASN1_STRING *os = NULL;
966 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
967 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
968 unsigned char *label;
970 if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
973 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
976 if (pad_mode == RSA_PKCS1_PADDING) {
977 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
981 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
983 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
985 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
987 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
990 oaep = RSA_OAEP_PARAMS_new();
993 if (!rsa_md_to_algor(&oaep->hashFunc, md))
995 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
998 ASN1_OCTET_STRING *los;
999 oaep->pSourceFunc = X509_ALGOR_new();
1000 if (oaep->pSourceFunc == NULL)
1002 los = ASN1_OCTET_STRING_new();
1005 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1006 ASN1_OCTET_STRING_free(los);
1009 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1010 V_ASN1_OCTET_STRING, los);
1012 /* create string with pss parameter encoding. */
1013 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1015 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1019 RSA_OAEP_PARAMS_free(oaep);
1020 ASN1_STRING_free(os);
1025 static int rsa_pkey_check(const EVP_PKEY *pkey)
1027 return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1030 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
1034 ASN1_PKEY_SIGPARAM_NULL,
1037 "OpenSSL RSA method",
1057 old_rsa_priv_decode,
1058 old_rsa_priv_encode,
1071 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1074 ASN1_PKEY_SIGPARAM_NULL,
1077 "OpenSSL RSA-PSS method",