1 /* crypto/rsa/rsa_ameth.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
61 #include "internal/cryptlib.h"
62 #include <openssl/asn1t.h>
63 #include <openssl/x509.h>
64 #include <openssl/rsa.h>
65 #include <openssl/bn.h>
66 #ifndef OPENSSL_NO_CMS
67 # include <openssl/cms.h>
69 #include "internal/asn1_int.h"
70 #include "internal/evp_int.h"
72 #ifndef OPENSSL_NO_CMS
73 static int rsa_cms_sign(CMS_SignerInfo *si);
74 static int rsa_cms_verify(CMS_SignerInfo *si);
75 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
76 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
79 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
81 unsigned char *penc = NULL;
83 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
86 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
87 V_ASN1_NULL, NULL, penc, penclen))
94 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
96 const unsigned char *p;
100 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
102 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
103 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
106 EVP_PKEY_assign_RSA(pkey, rsa);
110 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
112 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
113 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
118 static int old_rsa_priv_decode(EVP_PKEY *pkey,
119 const unsigned char **pder, int derlen)
123 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
124 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
127 EVP_PKEY_assign_RSA(pkey, rsa);
131 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
133 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
136 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
138 unsigned char *rk = NULL;
140 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
143 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
147 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
148 V_ASN1_NULL, NULL, rk, rklen)) {
149 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
156 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
158 const unsigned char *p;
160 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
162 return old_rsa_priv_decode(pkey, &p, pklen);
165 static int int_rsa_size(const EVP_PKEY *pkey)
167 return RSA_size(pkey->pkey.rsa);
170 static int rsa_bits(const EVP_PKEY *pkey)
172 return BN_num_bits(pkey->pkey.rsa->n);
175 static int rsa_security_bits(const EVP_PKEY *pkey)
177 return RSA_security_bits(pkey->pkey.rsa);
180 static void int_rsa_free(EVP_PKEY *pkey)
182 RSA_free(pkey->pkey.rsa);
185 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
190 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
194 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
198 unsigned char *m = NULL;
199 int ret = 0, mod_len = 0;
202 update_buflen(x->n, &buf_len);
203 update_buflen(x->e, &buf_len);
206 update_buflen(x->d, &buf_len);
207 update_buflen(x->p, &buf_len);
208 update_buflen(x->q, &buf_len);
209 update_buflen(x->dmp1, &buf_len);
210 update_buflen(x->dmq1, &buf_len);
211 update_buflen(x->iqmp, &buf_len);
214 m = OPENSSL_malloc(buf_len + 10);
216 RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE);
221 mod_len = BN_num_bits(x->n);
223 if (!BIO_indent(bp, off, 128))
227 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
231 s = "publicExponent:";
233 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len)
239 if (!ASN1_bn_print(bp, str, x->n, m, off))
241 if (!ASN1_bn_print(bp, s, x->e, m, off))
244 if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off))
246 if (!ASN1_bn_print(bp, "prime1:", x->p, m, off))
248 if (!ASN1_bn_print(bp, "prime2:", x->q, m, off))
250 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off))
252 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off))
254 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off))
263 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
266 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
269 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
272 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
275 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
276 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
280 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
282 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
286 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
287 X509_ALGOR **pmaskHash)
293 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
299 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
304 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
305 X509_ALGOR *maskHash, int indent)
309 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
313 if (BIO_puts(bp, "\n") <= 0)
315 if (!BIO_indent(bp, indent, 128))
317 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
320 if (pss->hashAlgorithm) {
321 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
323 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
326 if (BIO_puts(bp, "\n") <= 0)
329 if (!BIO_indent(bp, indent, 128))
332 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
334 if (pss->maskGenAlgorithm) {
335 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
337 if (BIO_puts(bp, " with ") <= 0)
340 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
342 } else if (BIO_puts(bp, "INVALID") <= 0)
344 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
348 if (!BIO_indent(bp, indent, 128))
350 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
352 if (pss->saltLength) {
353 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
355 } else if (BIO_puts(bp, "14 (default)") <= 0)
359 if (!BIO_indent(bp, indent, 128))
361 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
363 if (pss->trailerField) {
364 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
366 } else if (BIO_puts(bp, "BC (default)") <= 0)
377 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
378 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
380 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
383 X509_ALGOR *maskHash;
384 pss = rsa_pss_decode(sigalg, &maskHash);
385 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
386 RSA_PSS_PARAMS_free(pss);
387 X509_ALGOR_free(maskHash);
390 } else if (!sig && BIO_puts(bp, "\n") <= 0)
393 return X509_signature_dump(bp, sig, indent);
397 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
399 X509_ALGOR *alg = NULL;
402 case ASN1_PKEY_CTRL_PKCS7_SIGN:
404 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
407 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
409 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
411 #ifndef OPENSSL_NO_CMS
412 case ASN1_PKEY_CTRL_CMS_SIGN:
414 return rsa_cms_sign(arg2);
416 return rsa_cms_verify(arg2);
419 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
421 return rsa_cms_encrypt(arg2);
423 return rsa_cms_decrypt(arg2);
426 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
427 *(int *)arg2 = CMS_RECIPINFO_TRANS;
431 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
432 *(int *)arg2 = NID_sha256;
441 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
447 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
448 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
450 if (EVP_MD_type(md) == NID_sha1)
452 *palg = X509_ALGOR_new();
455 X509_ALGOR_set_md(*palg, md);
459 /* Allocate and set MGF1 algorithm ID from EVP_MD */
460 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
462 X509_ALGOR *algtmp = NULL;
463 ASN1_STRING *stmp = NULL;
465 if (EVP_MD_type(mgf1md) == NID_sha1)
467 /* need to embed algorithm ID inside another */
468 if (!rsa_md_to_algor(&algtmp, mgf1md))
470 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
472 *palg = X509_ALGOR_new();
475 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
478 ASN1_STRING_free(stmp);
479 X509_ALGOR_free(algtmp);
485 /* convert algorithm ID to EVP_MD, default SHA1 */
486 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
491 md = EVP_get_digestbyobj(alg->algorithm);
493 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
497 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
498 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
503 /* Check mask and lookup mask hash algorithm */
504 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
505 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
509 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
512 md = EVP_get_digestbyobj(maskHash->algorithm);
514 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
521 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
522 * suitable for setting an AlgorithmIdentifier.
525 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
527 const EVP_MD *sigmd, *mgf1md;
528 RSA_PSS_PARAMS *pss = NULL;
529 ASN1_STRING *os = NULL;
530 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)
545 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))
557 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
559 /* Finally create string with pss parameter encoding. */
560 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
564 RSA_PSS_PARAMS_free(pss);
567 ASN1_STRING_free(os);
572 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
573 * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
574 * passed to pkctx instead.
577 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
578 X509_ALGOR *sigalg, EVP_PKEY *pkey)
582 const EVP_MD *mgf1md = NULL, *md = NULL;
584 X509_ALGOR *maskHash;
585 /* Sanity check: make sure it is PSS */
586 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
587 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
590 /* Decode PSS parameters */
591 pss = rsa_pss_decode(sigalg, &maskHash);
594 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
597 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
600 md = rsa_algor_to_md(pss->hashAlgorithm);
604 if (pss->saltLength) {
605 saltlen = ASN1_INTEGER_get(pss->saltLength);
608 * Could perform more salt length sanity checks but the main RSA
609 * routines will trap other invalid values anyway.
612 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
619 * low-level routines support only trailer field 0xbc (value 1) and
620 * PKCS#1 says we should reject any other value anyway.
622 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
623 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
627 /* We have all parameters now set up context */
630 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
633 const EVP_MD *checkmd;
634 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
636 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
637 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
642 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
645 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
648 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
654 RSA_PSS_PARAMS_free(pss);
655 X509_ALGOR_free(maskHash);
659 #ifndef OPENSSL_NO_CMS
660 static int rsa_cms_verify(CMS_SignerInfo *si)
664 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
665 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
666 nid = OBJ_obj2nid(alg->algorithm);
667 if (nid == NID_rsaEncryption)
669 if (nid == NID_rsassaPss)
670 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
671 /* Workaround for some implementation that use a signature OID */
672 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
673 if (nid2 == NID_rsaEncryption)
681 * Customised RSA item verification routine. This is called when a signature
682 * is encountered requiring special handling. We currently only handle PSS.
685 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
686 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
689 /* Sanity check: make sure it is PSS */
690 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
691 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
694 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
701 #ifndef OPENSSL_NO_CMS
702 static int rsa_cms_sign(CMS_SignerInfo *si)
704 int pad_mode = RSA_PKCS1_PADDING;
706 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
707 ASN1_STRING *os = NULL;
708 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
710 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
713 if (pad_mode == RSA_PKCS1_PADDING) {
714 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
717 /* We don't support it */
718 if (pad_mode != RSA_PKCS1_PSS_PADDING)
720 os = rsa_ctx_to_pss(pkctx);
723 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
728 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
729 X509_ALGOR *alg1, X509_ALGOR *alg2,
730 ASN1_BIT_STRING *sig)
733 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
734 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
736 if (pad_mode == RSA_PKCS1_PADDING)
738 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
739 ASN1_STRING *os1 = NULL;
740 os1 = rsa_ctx_to_pss(pkctx);
743 /* Duplicate parameters if we have to */
745 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
747 ASN1_STRING_free(os1);
750 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
751 V_ASN1_SEQUENCE, os2);
753 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
754 V_ASN1_SEQUENCE, os1);
760 #ifndef OPENSSL_NO_CMS
761 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
762 X509_ALGOR **pmaskHash)
764 RSA_OAEP_PARAMS *pss;
768 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
774 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
779 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
785 unsigned char *label = NULL;
787 const EVP_MD *mgf1md = NULL, *md = NULL;
788 RSA_OAEP_PARAMS *oaep;
789 X509_ALGOR *maskHash;
790 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
793 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
795 nid = OBJ_obj2nid(cmsalg->algorithm);
796 if (nid == NID_rsaEncryption)
798 if (nid != NID_rsaesOaep) {
799 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
802 /* Decode OAEP parameters */
803 oaep = rsa_oaep_decode(cmsalg, &maskHash);
806 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
810 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
813 md = rsa_algor_to_md(oaep->hashFunc);
817 if (oaep->pSourceFunc) {
818 X509_ALGOR *plab = oaep->pSourceFunc;
819 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
820 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
823 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
824 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
828 label = plab->parameter->value.octet_string->data;
829 /* Stop label being freed when OAEP parameters are freed */
830 plab->parameter->value.octet_string->data = NULL;
831 labellen = plab->parameter->value.octet_string->length;
834 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
836 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
838 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
840 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
846 RSA_OAEP_PARAMS_free(oaep);
847 X509_ALGOR_free(maskHash);
851 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
853 const EVP_MD *md, *mgf1md;
854 RSA_OAEP_PARAMS *oaep = NULL;
855 ASN1_STRING *os = NULL;
857 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
858 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
859 unsigned char *label;
860 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
862 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
865 if (pad_mode == RSA_PKCS1_PADDING) {
866 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
870 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
872 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
874 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
876 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
879 oaep = RSA_OAEP_PARAMS_new();
882 if (!rsa_md_to_algor(&oaep->hashFunc, md))
884 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
887 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
888 oaep->pSourceFunc = X509_ALGOR_new();
889 if (oaep->pSourceFunc == NULL)
893 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
894 ASN1_OCTET_STRING_free(los);
897 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
898 V_ASN1_OCTET_STRING, los);
900 /* create string with pss parameter encoding. */
901 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
903 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
907 RSA_OAEP_PARAMS_free(oaep);
908 ASN1_STRING_free(os);
913 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
917 ASN1_PKEY_SIGPARAM_NULL,
920 "OpenSSL RSA method",