2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 #include "internal/cryptlib.h"
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/rsa.h>
64 #include <openssl/bn.h>
65 #ifndef OPENSSL_NO_CMS
66 # include <openssl/cms.h>
68 #include "internal/asn1_int.h"
69 #include "internal/evp_int.h"
71 #ifndef OPENSSL_NO_CMS
72 static int rsa_cms_sign(CMS_SignerInfo *si);
73 static int rsa_cms_verify(CMS_SignerInfo *si);
74 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
75 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
78 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
80 unsigned char *penc = NULL;
82 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
85 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
86 V_ASN1_NULL, NULL, penc, penclen))
93 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
95 const unsigned char *p;
99 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
101 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
102 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
105 EVP_PKEY_assign_RSA(pkey, rsa);
109 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
111 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
112 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
117 static int old_rsa_priv_decode(EVP_PKEY *pkey,
118 const unsigned char **pder, int derlen)
122 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
123 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
126 EVP_PKEY_assign_RSA(pkey, rsa);
130 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
132 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
135 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
137 unsigned char *rk = NULL;
139 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
142 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
146 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
147 V_ASN1_NULL, NULL, rk, rklen)) {
148 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
155 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
157 const unsigned char *p;
159 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
161 return old_rsa_priv_decode(pkey, &p, pklen);
164 static int int_rsa_size(const EVP_PKEY *pkey)
166 return RSA_size(pkey->pkey.rsa);
169 static int rsa_bits(const EVP_PKEY *pkey)
171 return BN_num_bits(pkey->pkey.rsa->n);
174 static int rsa_security_bits(const EVP_PKEY *pkey)
176 return RSA_security_bits(pkey->pkey.rsa);
179 static void int_rsa_free(EVP_PKEY *pkey)
181 RSA_free(pkey->pkey.rsa);
184 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
188 int ret = 0, mod_len = 0;
191 mod_len = BN_num_bits(x->n);
193 if (!BIO_indent(bp, off, 128))
197 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
200 s = "publicExponent:";
202 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
207 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
209 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
212 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
214 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
216 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
218 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
220 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
222 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
230 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
233 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
236 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
239 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
242 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
243 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
247 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
249 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
253 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
254 X509_ALGOR **pmaskHash)
260 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
266 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
271 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
272 X509_ALGOR *maskHash, int indent)
276 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
280 if (BIO_puts(bp, "\n") <= 0)
282 if (!BIO_indent(bp, indent, 128))
284 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
287 if (pss->hashAlgorithm) {
288 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
290 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
293 if (BIO_puts(bp, "\n") <= 0)
296 if (!BIO_indent(bp, indent, 128))
299 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
301 if (pss->maskGenAlgorithm) {
302 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
304 if (BIO_puts(bp, " with ") <= 0)
307 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
309 } else if (BIO_puts(bp, "INVALID") <= 0)
311 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
315 if (!BIO_indent(bp, indent, 128))
317 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
319 if (pss->saltLength) {
320 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
322 } else if (BIO_puts(bp, "14 (default)") <= 0)
326 if (!BIO_indent(bp, indent, 128))
328 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
330 if (pss->trailerField) {
331 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
333 } else if (BIO_puts(bp, "BC (default)") <= 0)
344 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
345 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
347 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
350 X509_ALGOR *maskHash;
351 pss = rsa_pss_decode(sigalg, &maskHash);
352 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
353 RSA_PSS_PARAMS_free(pss);
354 X509_ALGOR_free(maskHash);
357 } else if (!sig && BIO_puts(bp, "\n") <= 0)
360 return X509_signature_dump(bp, sig, indent);
364 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
366 X509_ALGOR *alg = NULL;
369 case ASN1_PKEY_CTRL_PKCS7_SIGN:
371 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
374 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
376 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
378 #ifndef OPENSSL_NO_CMS
379 case ASN1_PKEY_CTRL_CMS_SIGN:
381 return rsa_cms_sign(arg2);
383 return rsa_cms_verify(arg2);
386 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
388 return rsa_cms_encrypt(arg2);
390 return rsa_cms_decrypt(arg2);
393 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
394 *(int *)arg2 = CMS_RECIPINFO_TRANS;
398 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
399 *(int *)arg2 = NID_sha256;
408 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
414 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
415 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
417 if (EVP_MD_type(md) == NID_sha1)
419 *palg = X509_ALGOR_new();
422 X509_ALGOR_set_md(*palg, md);
426 /* Allocate and set MGF1 algorithm ID from EVP_MD */
427 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
429 X509_ALGOR *algtmp = NULL;
430 ASN1_STRING *stmp = NULL;
432 if (EVP_MD_type(mgf1md) == NID_sha1)
434 /* need to embed algorithm ID inside another */
435 if (!rsa_md_to_algor(&algtmp, mgf1md))
437 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
439 *palg = X509_ALGOR_new();
442 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
445 ASN1_STRING_free(stmp);
446 X509_ALGOR_free(algtmp);
452 /* convert algorithm ID to EVP_MD, default SHA1 */
453 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
458 md = EVP_get_digestbyobj(alg->algorithm);
460 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
464 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
465 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
470 /* Check mask and lookup mask hash algorithm */
471 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
472 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
476 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
479 md = EVP_get_digestbyobj(maskHash->algorithm);
481 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
488 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
489 * suitable for setting an AlgorithmIdentifier.
492 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
494 const EVP_MD *sigmd, *mgf1md;
495 RSA_PSS_PARAMS *pss = NULL;
496 ASN1_STRING *os = NULL;
497 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
499 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
501 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
503 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
506 saltlen = EVP_MD_size(sigmd);
507 else if (saltlen == -2) {
508 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
509 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
512 pss = RSA_PSS_PARAMS_new();
516 pss->saltLength = ASN1_INTEGER_new();
517 if (pss->saltLength == NULL)
519 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
522 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
524 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
526 /* Finally create string with pss parameter encoding. */
527 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
531 RSA_PSS_PARAMS_free(pss);
534 ASN1_STRING_free(os);
539 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
540 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
541 * passed to pkctx instead.
544 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
545 X509_ALGOR *sigalg, EVP_PKEY *pkey)
549 const EVP_MD *mgf1md = NULL, *md = NULL;
551 X509_ALGOR *maskHash;
552 /* Sanity check: make sure it is PSS */
553 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
554 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
557 /* Decode PSS parameters */
558 pss = rsa_pss_decode(sigalg, &maskHash);
561 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
564 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
567 md = rsa_algor_to_md(pss->hashAlgorithm);
571 if (pss->saltLength) {
572 saltlen = ASN1_INTEGER_get(pss->saltLength);
575 * Could perform more salt length sanity checks but the main RSA
576 * routines will trap other invalid values anyway.
579 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
586 * low-level routines support only trailer field 0xbc (value 1) and
587 * PKCS#1 says we should reject any other value anyway.
589 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
590 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
594 /* We have all parameters now set up context */
597 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
600 const EVP_MD *checkmd;
601 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
603 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
604 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
609 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
612 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
615 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
621 RSA_PSS_PARAMS_free(pss);
622 X509_ALGOR_free(maskHash);
626 #ifndef OPENSSL_NO_CMS
627 static int rsa_cms_verify(CMS_SignerInfo *si)
631 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
632 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
633 nid = OBJ_obj2nid(alg->algorithm);
634 if (nid == NID_rsaEncryption)
636 if (nid == NID_rsassaPss)
637 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
638 /* Workaround for some implementation that use a signature OID */
639 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
640 if (nid2 == NID_rsaEncryption)
648 * Customised RSA item verification routine. This is called when a signature
649 * is encountered requiring special handling. We currently only handle PSS.
652 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
653 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
656 /* Sanity check: make sure it is PSS */
657 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
658 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
661 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
668 #ifndef OPENSSL_NO_CMS
669 static int rsa_cms_sign(CMS_SignerInfo *si)
671 int pad_mode = RSA_PKCS1_PADDING;
673 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
674 ASN1_STRING *os = NULL;
675 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
677 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
680 if (pad_mode == RSA_PKCS1_PADDING) {
681 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
684 /* We don't support it */
685 if (pad_mode != RSA_PKCS1_PSS_PADDING)
687 os = rsa_ctx_to_pss(pkctx);
690 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
695 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
696 X509_ALGOR *alg1, X509_ALGOR *alg2,
697 ASN1_BIT_STRING *sig)
700 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
701 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
703 if (pad_mode == RSA_PKCS1_PADDING)
705 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
706 ASN1_STRING *os1 = NULL;
707 os1 = rsa_ctx_to_pss(pkctx);
710 /* Duplicate parameters if we have to */
712 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
714 ASN1_STRING_free(os1);
717 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
718 V_ASN1_SEQUENCE, os2);
720 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
721 V_ASN1_SEQUENCE, os1);
727 #ifndef OPENSSL_NO_CMS
728 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
729 X509_ALGOR **pmaskHash)
731 RSA_OAEP_PARAMS *pss;
735 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
741 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
746 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
752 unsigned char *label = NULL;
754 const EVP_MD *mgf1md = NULL, *md = NULL;
755 RSA_OAEP_PARAMS *oaep;
756 X509_ALGOR *maskHash;
757 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
760 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
762 nid = OBJ_obj2nid(cmsalg->algorithm);
763 if (nid == NID_rsaEncryption)
765 if (nid != NID_rsaesOaep) {
766 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
769 /* Decode OAEP parameters */
770 oaep = rsa_oaep_decode(cmsalg, &maskHash);
773 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
777 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
780 md = rsa_algor_to_md(oaep->hashFunc);
784 if (oaep->pSourceFunc) {
785 X509_ALGOR *plab = oaep->pSourceFunc;
786 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
787 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
790 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
791 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
795 label = plab->parameter->value.octet_string->data;
796 /* Stop label being freed when OAEP parameters are freed */
797 plab->parameter->value.octet_string->data = NULL;
798 labellen = plab->parameter->value.octet_string->length;
801 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
803 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
805 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
807 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
813 RSA_OAEP_PARAMS_free(oaep);
814 X509_ALGOR_free(maskHash);
818 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
820 const EVP_MD *md, *mgf1md;
821 RSA_OAEP_PARAMS *oaep = NULL;
822 ASN1_STRING *os = NULL;
824 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
825 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
826 unsigned char *label;
827 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
829 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
832 if (pad_mode == RSA_PKCS1_PADDING) {
833 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
837 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
839 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
841 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
843 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
846 oaep = RSA_OAEP_PARAMS_new();
849 if (!rsa_md_to_algor(&oaep->hashFunc, md))
851 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
854 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
855 oaep->pSourceFunc = X509_ALGOR_new();
856 if (oaep->pSourceFunc == NULL)
860 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
861 ASN1_OCTET_STRING_free(los);
864 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
865 V_ASN1_OCTET_STRING, los);
867 /* create string with pss parameter encoding. */
868 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
870 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
874 RSA_OAEP_PARAMS_free(oaep);
875 ASN1_STRING_free(os);
880 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
884 ASN1_PKEY_SIGPARAM_NULL,
887 "OpenSSL RSA method",