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) == 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)
256 if (BIO_puts(bp, "\n") <= 0)
259 if (!BIO_indent(bp, indent, 128))
262 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
264 if (pss->maskGenAlgorithm) {
265 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
267 if (BIO_puts(bp, " with ") <= 0)
269 maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
270 if (maskHash != NULL) {
271 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
273 } else if (BIO_puts(bp, "INVALID") <= 0)
275 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
279 if (!BIO_indent(bp, indent, 128))
281 if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
283 if (pss->saltLength) {
284 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
286 } else if (BIO_puts(bp, "14 (default)") <= 0)
290 if (!BIO_indent(bp, indent, 128))
292 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
294 if (pss->trailerField) {
295 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
297 } else if (BIO_puts(bp, "BC (default)") <= 0)
304 X509_ALGOR_free(maskHash);
309 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
311 const RSA *x = pkey->pkey.rsa;
314 int ret = 0, mod_len = 0;
317 mod_len = BN_num_bits(x->n);
319 if (!BIO_indent(bp, off, 128))
322 if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ? "RSA-PSS" : "RSA") <= 0)
326 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
329 s = "publicExponent:";
331 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
336 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
338 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
341 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
343 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
345 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
347 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
349 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
351 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
354 if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
361 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
364 return pkey_rsa_print(bp, pkey, indent, 0);
367 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
370 return pkey_rsa_print(bp, pkey, indent, 1);
373 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
377 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
383 if (pss->maskGenAlgorithm != NULL) {
384 pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
385 if (pss->maskHash == NULL) {
386 RSA_PSS_PARAMS_free(pss);
394 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
395 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
397 if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
399 RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
400 rv = rsa_pss_param_print(bp, 0, pss, indent);
401 RSA_PSS_PARAMS_free(pss);
404 } else if (!sig && BIO_puts(bp, "\n") <= 0) {
408 return X509_signature_dump(bp, sig, indent);
412 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
414 X509_ALGOR *alg = NULL;
418 case ASN1_PKEY_CTRL_PKCS7_SIGN:
420 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
423 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
424 if (pkey_is_pss(pkey))
427 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
429 #ifndef OPENSSL_NO_CMS
430 case ASN1_PKEY_CTRL_CMS_SIGN:
432 return rsa_cms_sign(arg2);
434 return rsa_cms_verify(arg2);
437 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
438 if (pkey_is_pss(pkey))
441 return rsa_cms_encrypt(arg2);
443 return rsa_cms_decrypt(arg2);
446 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
447 if (pkey_is_pss(pkey))
449 *(int *)arg2 = CMS_RECIPINFO_TRANS;
453 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
454 *(int *)arg2 = NID_sha256;
463 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
469 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
470 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
472 if (md == NULL || EVP_MD_type(md) == NID_sha1)
474 *palg = X509_ALGOR_new();
477 X509_ALGOR_set_md(*palg, md);
481 /* Allocate and set MGF1 algorithm ID from EVP_MD */
482 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
484 X509_ALGOR *algtmp = NULL;
485 ASN1_STRING *stmp = NULL;
488 if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
490 /* need to embed algorithm ID inside another */
491 if (!rsa_md_to_algor(&algtmp, mgf1md))
493 if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
495 *palg = X509_ALGOR_new();
498 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
501 ASN1_STRING_free(stmp);
502 X509_ALGOR_free(algtmp);
508 /* convert algorithm ID to EVP_MD, default SHA1 */
509 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
515 md = EVP_get_digestbyobj(alg->algorithm);
517 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
522 * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
523 * suitable for setting an AlgorithmIdentifier.
526 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
528 const EVP_MD *sigmd, *mgf1md;
529 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
532 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
534 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
536 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
539 saltlen = EVP_MD_size(sigmd);
540 else if (saltlen == -2) {
541 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
542 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
546 return rsa_pss_params_create(sigmd, mgf1md, saltlen);
549 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
550 const EVP_MD *mgf1md, int saltlen)
552 RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
557 pss->saltLength = ASN1_INTEGER_new();
558 if (pss->saltLength == NULL)
560 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
563 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
567 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
571 RSA_PSS_PARAMS_free(pss);
575 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
577 RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
583 os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
584 RSA_PSS_PARAMS_free(pss);
589 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
590 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
591 * passed to pkctx instead.
594 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
595 X509_ALGOR *sigalg, EVP_PKEY *pkey)
599 const EVP_MD *mgf1md = NULL, *md = NULL;
602 /* Sanity check: make sure it is PSS */
603 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
604 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
607 /* Decode PSS parameters */
608 pss = rsa_pss_decode(sigalg);
610 if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
611 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
615 /* We have all parameters now set up context */
617 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
620 const EVP_MD *checkmd;
621 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
623 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
624 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
629 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
632 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
635 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
641 RSA_PSS_PARAMS_free(pss);
645 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
646 const EVP_MD **pmgf1md, int *psaltlen)
650 *pmd = rsa_algor_to_md(pss->hashAlgorithm);
653 *pmgf1md = rsa_algor_to_md(pss->maskHash);
654 if (*pmgf1md == NULL)
656 if (pss->saltLength) {
657 *psaltlen = ASN1_INTEGER_get(pss->saltLength);
659 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
666 * low-level routines support only trailer field 0xbc (value 1) and
667 * PKCS#1 says we should reject any other value anyway.
669 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
670 RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
677 #ifndef OPENSSL_NO_CMS
678 static int rsa_cms_verify(CMS_SignerInfo *si)
682 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
684 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
685 nid = OBJ_obj2nid(alg->algorithm);
686 if (nid == EVP_PKEY_RSA_PSS)
687 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
688 /* Only PSS allowed for PSS keys */
689 if (pkey_ctx_is_pss(pkctx)) {
690 RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
693 if (nid == NID_rsaEncryption)
695 /* Workaround for some implementation that use a signature OID */
696 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
697 if (nid2 == NID_rsaEncryption)
705 * Customised RSA item verification routine. This is called when a signature
706 * is encountered requiring special handling. We currently only handle PSS.
709 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
710 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
713 /* Sanity check: make sure it is PSS */
714 if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
715 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
718 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
725 #ifndef OPENSSL_NO_CMS
726 static int rsa_cms_sign(CMS_SignerInfo *si)
728 int pad_mode = RSA_PKCS1_PADDING;
730 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
731 ASN1_STRING *os = NULL;
733 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
735 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
738 if (pad_mode == RSA_PKCS1_PADDING) {
739 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
742 /* We don't support it */
743 if (pad_mode != RSA_PKCS1_PSS_PADDING)
745 os = rsa_ctx_to_pss_string(pkctx);
748 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
753 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
754 X509_ALGOR *alg1, X509_ALGOR *alg2,
755 ASN1_BIT_STRING *sig)
758 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
760 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
762 if (pad_mode == RSA_PKCS1_PADDING)
764 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
765 ASN1_STRING *os1 = NULL;
766 os1 = rsa_ctx_to_pss_string(pkctx);
769 /* Duplicate parameters if we have to */
771 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
773 ASN1_STRING_free(os1);
776 X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
777 V_ASN1_SEQUENCE, os2);
779 X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
780 V_ASN1_SEQUENCE, os1);
786 #ifndef OPENSSL_NO_CMS
787 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
789 RSA_OAEP_PARAMS *oaep;
791 oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
797 if (oaep->maskGenFunc != NULL) {
798 oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
799 if (oaep->maskHash == NULL) {
800 RSA_OAEP_PARAMS_free(oaep);
807 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
813 unsigned char *label = NULL;
815 const EVP_MD *mgf1md = NULL, *md = NULL;
816 RSA_OAEP_PARAMS *oaep;
818 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
821 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
823 nid = OBJ_obj2nid(cmsalg->algorithm);
824 if (nid == NID_rsaEncryption)
826 if (nid != NID_rsaesOaep) {
827 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
830 /* Decode OAEP parameters */
831 oaep = rsa_oaep_decode(cmsalg);
834 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
838 mgf1md = rsa_algor_to_md(oaep->maskHash);
841 md = rsa_algor_to_md(oaep->hashFunc);
845 if (oaep->pSourceFunc != NULL) {
846 X509_ALGOR *plab = oaep->pSourceFunc;
848 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
849 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
852 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
853 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
857 label = plab->parameter->value.octet_string->data;
858 /* Stop label being freed when OAEP parameters are freed */
859 plab->parameter->value.octet_string->data = NULL;
860 labellen = plab->parameter->value.octet_string->length;
863 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
865 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
867 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
869 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
875 RSA_OAEP_PARAMS_free(oaep);
879 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
881 const EVP_MD *md, *mgf1md;
882 RSA_OAEP_PARAMS *oaep = NULL;
883 ASN1_STRING *os = NULL;
885 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
886 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
887 unsigned char *label;
889 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
891 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
894 if (pad_mode == RSA_PKCS1_PADDING) {
895 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
899 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
901 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
903 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
905 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
908 oaep = RSA_OAEP_PARAMS_new();
911 if (!rsa_md_to_algor(&oaep->hashFunc, md))
913 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
916 ASN1_OCTET_STRING *los;
917 oaep->pSourceFunc = X509_ALGOR_new();
918 if (oaep->pSourceFunc == NULL)
920 los = ASN1_OCTET_STRING_new();
923 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
924 ASN1_OCTET_STRING_free(los);
927 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
928 V_ASN1_OCTET_STRING, los);
930 /* create string with pss parameter encoding. */
931 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
933 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
937 RSA_OAEP_PARAMS_free(oaep);
938 ASN1_STRING_free(os);
943 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
947 ASN1_PKEY_SIGPARAM_NULL,
950 "OpenSSL RSA method",
981 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
984 ASN1_PKEY_SIGPARAM_NULL,
987 "OpenSSL RSA-PSS method",