2 * Copyright 2006-2016 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;
35 /* If RSA it's just NULL type */
36 if (pkey->ameth->pkey_id == EVP_PKEY_RSA) {
37 *pstrtype = V_ASN1_NULL;
40 /* If no PSS parameters we omit parameters entirely */
41 if (rsa->pss == NULL) {
42 *pstrtype = V_ASN1_UNDEF;
45 /* Encode PSS parameters */
46 if (!ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr)) {
47 ASN1_STRING_free(*pstr);
52 *pstrtype = V_ASN1_SEQUENCE;
55 /* Decode any parameters and set them in RSA structure */
56 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
58 const ASN1_OBJECT *algoid;
62 X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
63 if (OBJ_obj2nid(algoid) == EVP_PKEY_RSA)
65 if (algptype == V_ASN1_UNDEF)
67 if (algptype != V_ASN1_SEQUENCE) {
68 RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
71 rsa->pss = rsa_pss_decode(alg);
77 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
79 unsigned char *penc = NULL;
83 if (!rsa_param_encode(pkey, &str, &strtype))
85 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
88 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
89 strtype, str, penc, penclen))
96 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
98 const unsigned char *p;
103 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
105 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
106 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
109 if (!rsa_param_decode(rsa, alg)) {
113 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
117 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
119 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
120 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
125 static int old_rsa_priv_decode(EVP_PKEY *pkey,
126 const unsigned char **pder, int derlen)
130 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
131 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
134 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
138 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
140 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
143 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
145 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);
158 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
159 strtype, str, rk, rklen)) {
160 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
167 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
169 const unsigned char *p;
172 const X509_ALGOR *alg;
174 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
176 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
178 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
181 if (!rsa_param_decode(rsa, alg)) {
185 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
189 static int int_rsa_size(const EVP_PKEY *pkey)
191 return RSA_size(pkey->pkey.rsa);
194 static int rsa_bits(const EVP_PKEY *pkey)
196 return BN_num_bits(pkey->pkey.rsa->n);
199 static int rsa_security_bits(const EVP_PKEY *pkey)
201 return RSA_security_bits(pkey->pkey.rsa);
204 static void int_rsa_free(EVP_PKEY *pkey)
206 RSA_free(pkey->pkey.rsa);
209 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
211 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
213 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
217 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
221 X509_ALGOR *maskHash = NULL;
222 if (!BIO_indent(bp, indent, 128))
226 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
230 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
233 } else if (pss == NULL) {
234 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
238 if (BIO_puts(bp, "\n") <= 0)
242 if (!BIO_indent(bp, indent, 128))
244 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
247 if (pss->hashAlgorithm) {
248 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
250 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
253 if (BIO_puts(bp, "\n") <= 0)
256 if (!BIO_indent(bp, indent, 128))
259 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
261 if (pss->maskGenAlgorithm) {
262 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
264 if (BIO_puts(bp, " with ") <= 0)
266 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
267 if (maskHash != NULL) {
268 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
270 } else if (BIO_puts(bp, "INVALID") <= 0)
272 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
276 if (!BIO_indent(bp, indent, 128))
278 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
280 if (pss->saltLength) {
281 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
283 } else if (BIO_puts(bp, "14 (default)") <= 0)
287 if (!BIO_indent(bp, indent, 128))
289 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
291 if (pss->trailerField) {
292 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
294 } else if (BIO_puts(bp, "BC (default)") <= 0)
301 X509_ALGOR_free(maskHash);
306 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
308 const RSA *x = pkey->pkey.rsa;
311 int ret = 0, mod_len = 0;
314 mod_len = BN_num_bits(x->n);
316 if (!BIO_indent(bp, off, 128))
319 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
323 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
326 s = "publicExponent:";
328 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
333 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
335 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
338 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
340 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
342 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
344 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
346 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
348 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
351 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
358 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
361 return pkey_rsa_print(bp, pkey, indent, 0);
364 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
367 return pkey_rsa_print(bp, pkey, indent, 1);
370 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
374 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
380 if (pss->maskGenAlgorithm != NULL) {
381 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
382 if (pss->maskHash == NULL) {
383 RSA_PSS_PARAMS_free(pss);
391 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
392 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
394 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
397 pss = rsa_pss_decode(sigalg);
398 rv = rsa_pss_param_print(bp, 0, pss, indent);
399 RSA_PSS_PARAMS_free(pss);
402 } else if (!sig && BIO_puts(bp, "\n") <= 0)
405 return X509_signature_dump(bp, sig, indent);
409 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
411 X509_ALGOR *alg = NULL;
414 case ASN1_PKEY_CTRL_PKCS7_SIGN:
416 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
419 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
420 if (pkey_is_pss(pkey))
423 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
425 #ifndef OPENSSL_NO_CMS
426 case ASN1_PKEY_CTRL_CMS_SIGN:
428 return rsa_cms_sign(arg2);
430 return rsa_cms_verify(arg2);
433 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
434 if (pkey_is_pss(pkey))
437 return rsa_cms_encrypt(arg2);
439 return rsa_cms_decrypt(arg2);
442 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
443 if (pkey_is_pss(pkey))
445 *(int *)arg2 = CMS_RECIPINFO_TRANS;
449 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
450 *(int *)arg2 = NID_sha256;
459 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
465 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
466 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
468 if (md == NULL || EVP_MD_type(md) == NID_sha1)
470 *palg = X509_ALGOR_new();
473 X509_ALGOR_set_md(*palg, md);
477 /* Allocate and set MGF1 algorithm ID from EVP_MD */
478 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
480 X509_ALGOR *algtmp = NULL;
481 ASN1_STRING *stmp = NULL;
483 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
485 /* need to embed algorithm ID inside another */
486 if (!rsa_md_to_algor(&algtmp, mgf1md))
488 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
490 *palg = X509_ALGOR_new();
493 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
496 ASN1_STRING_free(stmp);
497 X509_ALGOR_free(algtmp);
503 /* convert algorithm ID to EVP_MD, default SHA1 */
504 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
509 md = EVP_get_digestbyobj(alg->algorithm);
511 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
516 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
517 * suitable for setting an AlgorithmIdentifier.
520 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
522 const EVP_MD *sigmd, *mgf1md;
523 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
525 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
527 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
529 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
532 saltlen = EVP_MD_size(sigmd);
533 else if (saltlen == -2) {
534 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
535 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
539 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
542 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
543 const EVP_MD *mgf1md, int saltlen)
545 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
549 pss->saltLength = ASN1_INTEGER_new();
550 if (pss->saltLength == NULL)
552 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
555 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
559 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
563 RSA_PSS_PARAMS_free(pss);
567 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
569 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
570 ASN1_STRING *os = NULL;
574 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) {
575 ASN1_STRING_free(os);
578 RSA_PSS_PARAMS_free(pss);
583 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
584 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
585 * passed to pkctx instead.
588 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
589 X509_ALGOR *sigalg, EVP_PKEY *pkey)
593 const EVP_MD *mgf1md = NULL, *md = NULL;
595 /* Sanity check: make sure it is PSS */
596 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
597 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
600 /* Decode PSS parameters */
601 pss = rsa_pss_decode(sigalg);
603 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
604 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
608 /* We have all parameters now set up context */
610 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
613 const EVP_MD *checkmd;
614 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
616 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
617 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
622 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
625 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
628 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
634 RSA_PSS_PARAMS_free(pss);
638 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
639 const EVP_MD **pmgf1md, int *psaltlen)
643 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
646 *pmgf1md = rsa_algor_to_md(pss->maskHash);
647 if (*pmgf1md == NULL)
649 if (pss->saltLength) {
650 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
652 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
659 * low-level routines support only trailer field 0xbc (value 1) and
660 * PKCS#1 says we should reject any other value anyway.
662 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
663 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
670 #ifndef OPENSSL_NO_CMS
671 static int rsa_cms_verify(CMS_SignerInfo *si)
675 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
676 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
677 nid = OBJ_obj2nid(alg->algorithm);
678 if (nid == EVP_PKEY_RSA_PSS)
679 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
680 /* Only PSS allowed for PSS keys */
681 if (pkey_ctx_is_pss(pkctx)) {
682 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
685 if (nid == NID_rsaEncryption)
687 /* Workaround for some implementation that use a signature OID */
688 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
689 if (nid2 == NID_rsaEncryption)
697 * Customised RSA item verification routine. This is called when a signature
698 * is encountered requiring special handling. We currently only handle PSS.
701 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
702 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
705 /* Sanity check: make sure it is PSS */
706 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
707 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
710 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
717 #ifndef OPENSSL_NO_CMS
718 static int rsa_cms_sign(CMS_SignerInfo *si)
720 int pad_mode = RSA_PKCS1_PADDING;
722 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
723 ASN1_STRING *os = NULL;
724 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
726 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
729 if (pad_mode == RSA_PKCS1_PADDING) {
730 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
733 /* We don't support it */
734 if (pad_mode != RSA_PKCS1_PSS_PADDING)
736 os = rsa_ctx_to_pss_string(pkctx);
739 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
744 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
745 X509_ALGOR *alg1, X509_ALGOR *alg2,
746 ASN1_BIT_STRING *sig)
749 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
750 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
752 if (pad_mode == RSA_PKCS1_PADDING)
754 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
755 ASN1_STRING *os1 = NULL;
756 os1 = rsa_ctx_to_pss_string(pkctx);
759 /* Duplicate parameters if we have to */
761 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
763 ASN1_STRING_free(os1);
766 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
767 V_ASN1_SEQUENCE, os2);
769 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
770 V_ASN1_SEQUENCE, os1);
776 #ifndef OPENSSL_NO_CMS
777 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
779 RSA_OAEP_PARAMS *oaep;
781 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
787 if (oaep->maskGenFunc != NULL) {
788 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
789 if (oaep->maskHash == NULL) {
790 RSA_OAEP_PARAMS_free(oaep);
797 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
803 unsigned char *label = NULL;
805 const EVP_MD *mgf1md = NULL, *md = NULL;
806 RSA_OAEP_PARAMS *oaep;
807 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
810 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
812 nid = OBJ_obj2nid(cmsalg->algorithm);
813 if (nid == NID_rsaEncryption)
815 if (nid != NID_rsaesOaep) {
816 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
819 /* Decode OAEP parameters */
820 oaep = rsa_oaep_decode(cmsalg);
823 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
827 mgf1md = rsa_algor_to_md(oaep->maskHash);
830 md = rsa_algor_to_md(oaep->hashFunc);
834 if (oaep->pSourceFunc) {
835 X509_ALGOR *plab = oaep->pSourceFunc;
836 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
837 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
840 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
841 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
845 label = plab->parameter->value.octet_string->data;
846 /* Stop label being freed when OAEP parameters are freed */
847 plab->parameter->value.octet_string->data = NULL;
848 labellen = plab->parameter->value.octet_string->length;
851 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
853 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
855 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
857 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
863 RSA_OAEP_PARAMS_free(oaep);
867 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
869 const EVP_MD *md, *mgf1md;
870 RSA_OAEP_PARAMS *oaep = NULL;
871 ASN1_STRING *os = NULL;
873 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
874 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
875 unsigned char *label;
876 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
878 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
881 if (pad_mode == RSA_PKCS1_PADDING) {
882 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
886 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
888 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
890 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
892 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
895 oaep = RSA_OAEP_PARAMS_new();
898 if (!rsa_md_to_algor(&oaep->hashFunc, md))
900 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
903 ASN1_OCTET_STRING *los;
904 oaep->pSourceFunc = X509_ALGOR_new();
905 if (oaep->pSourceFunc == NULL)
907 los = ASN1_OCTET_STRING_new();
910 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
911 ASN1_OCTET_STRING_free(los);
914 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
915 V_ASN1_OCTET_STRING, los);
917 /* create string with pss parameter encoding. */
918 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
920 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
924 RSA_OAEP_PARAMS_free(oaep);
925 ASN1_STRING_free(os);
930 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
934 ASN1_PKEY_SIGPARAM_NULL,
937 "OpenSSL RSA method",
968 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
971 ASN1_PKEY_SIGPARAM_NULL,
974 "OpenSSL RSA-PSS method",