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;
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)) {
48 ASN1_STRING_free(*pstr);
53 *pstrtype = V_ASN1_SEQUENCE;
56 /* Decode any parameters and set them in RSA structure */
57 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
59 const ASN1_OBJECT *algoid;
63 X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
64 if (OBJ_obj2nid(algoid) == EVP_PKEY_RSA)
66 if (algptype == V_ASN1_UNDEF)
68 if (algptype != V_ASN1_SEQUENCE) {
69 RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
72 rsa->pss = rsa_pss_decode(alg);
78 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
80 unsigned char *penc = NULL;
85 if (!rsa_param_encode(pkey, &str, &strtype))
87 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
90 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
91 strtype, str, penc, penclen))
98 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
100 const unsigned char *p;
105 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
107 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
108 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
111 if (!rsa_param_decode(rsa, alg)) {
115 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
119 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
121 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
122 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
127 static int old_rsa_priv_decode(EVP_PKEY *pkey,
128 const unsigned char **pder, int derlen)
132 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
133 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
136 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
140 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
142 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
145 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
147 unsigned char *rk = NULL;
152 if (!rsa_param_encode(pkey, &str, &strtype))
154 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
157 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
161 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
162 strtype, str, rk, rklen)) {
163 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
170 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
172 const unsigned char *p;
175 const X509_ALGOR *alg;
177 if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
179 rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
181 RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
184 if (!rsa_param_decode(rsa, alg)) {
188 EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
192 static int int_rsa_size(const EVP_PKEY *pkey)
194 return RSA_size(pkey->pkey.rsa);
197 static int rsa_bits(const EVP_PKEY *pkey)
199 return BN_num_bits(pkey->pkey.rsa->n);
202 static int rsa_security_bits(const EVP_PKEY *pkey)
204 return RSA_security_bits(pkey->pkey.rsa);
207 static void int_rsa_free(EVP_PKEY *pkey)
209 RSA_free(pkey->pkey.rsa);
212 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
214 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
216 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
220 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
224 X509_ALGOR *maskHash = NULL;
226 if (!BIO_indent(bp, indent, 128))
230 if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
234 if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
237 } else if (pss == NULL) {
238 if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
242 if (BIO_puts(bp, "\n") <= 0)
246 if (!BIO_indent(bp, indent, 128))
248 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
251 if (pss->hashAlgorithm) {
252 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
254 } 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)
276 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
280 if (!BIO_indent(bp, indent, 128))
282 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
284 if (pss->saltLength) {
285 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
287 } else if (BIO_puts(bp, "14 (default)") <= 0)
291 if (!BIO_indent(bp, indent, 128))
293 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
295 if (pss->trailerField) {
296 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
298 } else if (BIO_puts(bp, "BC (default)") <= 0)
305 X509_ALGOR_free(maskHash);
310 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
312 const RSA *x = pkey->pkey.rsa;
315 int ret = 0, mod_len = 0;
318 mod_len = BN_num_bits(x->n);
320 if (!BIO_indent(bp, off, 128))
323 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
327 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
330 s = "publicExponent:";
332 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
337 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
339 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
342 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
344 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
346 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
348 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
350 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
352 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
355 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
362 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
365 return pkey_rsa_print(bp, pkey, indent, 0);
368 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
371 return pkey_rsa_print(bp, pkey, indent, 1);
374 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
378 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
384 if (pss->maskGenAlgorithm != NULL) {
385 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
386 if (pss->maskHash == NULL) {
387 RSA_PSS_PARAMS_free(pss);
395 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
396 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
398 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
400 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
401 rv = rsa_pss_param_print(bp, 0, pss, indent);
402 RSA_PSS_PARAMS_free(pss);
405 } else if (!sig && BIO_puts(bp, "\n") <= 0) {
409 return X509_signature_dump(bp, sig, indent);
413 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
415 X509_ALGOR *alg = NULL;
419 case ASN1_PKEY_CTRL_PKCS7_SIGN:
421 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
424 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
425 if (pkey_is_pss(pkey))
428 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
430 #ifndef OPENSSL_NO_CMS
431 case ASN1_PKEY_CTRL_CMS_SIGN:
433 return rsa_cms_sign(arg2);
435 return rsa_cms_verify(arg2);
438 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
439 if (pkey_is_pss(pkey))
442 return rsa_cms_encrypt(arg2);
444 return rsa_cms_decrypt(arg2);
447 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
448 if (pkey_is_pss(pkey))
450 *(int *)arg2 = CMS_RECIPINFO_TRANS;
454 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
455 *(int *)arg2 = NID_sha256;
464 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
470 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
471 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
473 if (md == NULL || EVP_MD_type(md) == NID_sha1)
475 *palg = X509_ALGOR_new();
478 X509_ALGOR_set_md(*palg, md);
482 /* Allocate and set MGF1 algorithm ID from EVP_MD */
483 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
485 X509_ALGOR *algtmp = NULL;
486 ASN1_STRING *stmp = NULL;
489 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
491 /* need to embed algorithm ID inside another */
492 if (!rsa_md_to_algor(&algtmp, mgf1md))
494 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
496 *palg = X509_ALGOR_new();
499 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
502 ASN1_STRING_free(stmp);
503 X509_ALGOR_free(algtmp);
509 /* convert algorithm ID to EVP_MD, default SHA1 */
510 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
516 md = EVP_get_digestbyobj(alg->algorithm);
518 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
523 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
524 * suitable for setting an AlgorithmIdentifier.
527 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
529 const EVP_MD *sigmd, *mgf1md;
530 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
533 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
535 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
537 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
540 saltlen = EVP_MD_size(sigmd);
541 else if (saltlen == -2) {
542 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
543 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
547 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
550 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
551 const EVP_MD *mgf1md, int saltlen)
553 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
558 pss->saltLength = ASN1_INTEGER_new();
559 if (pss->saltLength == NULL)
561 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
564 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
568 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
572 RSA_PSS_PARAMS_free(pss);
576 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
578 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
579 ASN1_STRING *os = NULL;
584 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os)) {
585 ASN1_STRING_free(os);
588 RSA_PSS_PARAMS_free(pss);
593 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
594 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
595 * passed to pkctx instead.
598 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
599 X509_ALGOR *sigalg, EVP_PKEY *pkey)
603 const EVP_MD *mgf1md = NULL, *md = NULL;
606 /* Sanity check: make sure it is PSS */
607 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
608 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
611 /* Decode PSS parameters */
612 pss = rsa_pss_decode(sigalg);
614 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
615 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
619 /* We have all parameters now set up context */
621 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
624 const EVP_MD *checkmd;
625 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
627 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
628 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
633 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
636 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
639 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
645 RSA_PSS_PARAMS_free(pss);
649 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
650 const EVP_MD **pmgf1md, int *psaltlen)
654 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
657 *pmgf1md = rsa_algor_to_md(pss->maskHash);
658 if (*pmgf1md == NULL)
660 if (pss->saltLength) {
661 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
663 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
670 * low-level routines support only trailer field 0xbc (value 1) and
671 * PKCS#1 says we should reject any other value anyway.
673 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
674 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
681 #ifndef OPENSSL_NO_CMS
682 static int rsa_cms_verify(CMS_SignerInfo *si)
686 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
688 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
689 nid = OBJ_obj2nid(alg->algorithm);
690 if (nid == EVP_PKEY_RSA_PSS)
691 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
692 /* Only PSS allowed for PSS keys */
693 if (pkey_ctx_is_pss(pkctx)) {
694 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
697 if (nid == NID_rsaEncryption)
699 /* Workaround for some implementation that use a signature OID */
700 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
701 if (nid2 == NID_rsaEncryption)
709 * Customised RSA item verification routine. This is called when a signature
710 * is encountered requiring special handling. We currently only handle PSS.
713 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
714 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
717 /* Sanity check: make sure it is PSS */
718 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
719 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
722 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
729 #ifndef OPENSSL_NO_CMS
730 static int rsa_cms_sign(CMS_SignerInfo *si)
732 int pad_mode = RSA_PKCS1_PADDING;
734 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
735 ASN1_STRING *os = NULL;
737 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
739 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
742 if (pad_mode == RSA_PKCS1_PADDING) {
743 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
746 /* We don't support it */
747 if (pad_mode != RSA_PKCS1_PSS_PADDING)
749 os = rsa_ctx_to_pss_string(pkctx);
752 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
757 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
758 X509_ALGOR *alg1, X509_ALGOR *alg2,
759 ASN1_BIT_STRING *sig)
762 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
764 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
766 if (pad_mode == RSA_PKCS1_PADDING)
768 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
769 ASN1_STRING *os1 = NULL;
770 os1 = rsa_ctx_to_pss_string(pkctx);
773 /* Duplicate parameters if we have to */
775 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
777 ASN1_STRING_free(os1);
780 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
781 V_ASN1_SEQUENCE, os2);
783 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
784 V_ASN1_SEQUENCE, os1);
790 #ifndef OPENSSL_NO_CMS
791 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
793 RSA_OAEP_PARAMS *oaep;
795 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
801 if (oaep->maskGenFunc != NULL) {
802 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
803 if (oaep->maskHash == NULL) {
804 RSA_OAEP_PARAMS_free(oaep);
811 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
817 unsigned char *label = NULL;
819 const EVP_MD *mgf1md = NULL, *md = NULL;
820 RSA_OAEP_PARAMS *oaep;
822 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
825 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
827 nid = OBJ_obj2nid(cmsalg->algorithm);
828 if (nid == NID_rsaEncryption)
830 if (nid != NID_rsaesOaep) {
831 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
834 /* Decode OAEP parameters */
835 oaep = rsa_oaep_decode(cmsalg);
838 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
842 mgf1md = rsa_algor_to_md(oaep->maskHash);
845 md = rsa_algor_to_md(oaep->hashFunc);
849 if (oaep->pSourceFunc != NULL) {
850 X509_ALGOR *plab = oaep->pSourceFunc;
852 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
853 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
856 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
857 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
861 label = plab->parameter->value.octet_string->data;
862 /* Stop label being freed when OAEP parameters are freed */
863 plab->parameter->value.octet_string->data = NULL;
864 labellen = plab->parameter->value.octet_string->length;
867 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
869 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
871 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
873 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
879 RSA_OAEP_PARAMS_free(oaep);
883 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
885 const EVP_MD *md, *mgf1md;
886 RSA_OAEP_PARAMS *oaep = NULL;
887 ASN1_STRING *os = NULL;
889 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
890 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
891 unsigned char *label;
893 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
895 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
898 if (pad_mode == RSA_PKCS1_PADDING) {
899 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
903 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
905 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
907 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
909 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
912 oaep = RSA_OAEP_PARAMS_new();
915 if (!rsa_md_to_algor(&oaep->hashFunc, md))
917 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
920 ASN1_OCTET_STRING *los;
921 oaep->pSourceFunc = X509_ALGOR_new();
922 if (oaep->pSourceFunc == NULL)
924 los = ASN1_OCTET_STRING_new();
927 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
928 ASN1_OCTET_STRING_free(los);
931 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
932 V_ASN1_OCTET_STRING, los);
934 /* create string with pss parameter encoding. */
935 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
937 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
941 RSA_OAEP_PARAMS_free(oaep);
942 ASN1_STRING_free(os);
947 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
951 ASN1_PKEY_SIGPARAM_NULL,
954 "OpenSSL RSA method",
985 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
988 ASN1_PKEY_SIGPARAM_NULL,
991 "OpenSSL RSA-PSS method",