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/bn.h>
64 #include <openssl/cms.h>
65 #include "internal/asn1_int.h"
66 #include "internal/evp_int.h"
69 #ifndef OPENSSL_NO_CMS
70 static int rsa_cms_sign(CMS_SignerInfo *si);
71 static int rsa_cms_verify(CMS_SignerInfo *si);
72 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
73 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
76 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
78 unsigned char *penc = NULL;
80 penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
83 if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_RSA),
84 V_ASN1_NULL, NULL, penc, penclen))
91 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
93 const unsigned char *p;
97 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
99 if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
100 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
103 EVP_PKEY_assign_RSA(pkey, rsa);
107 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
109 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
110 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
115 static int old_rsa_priv_decode(EVP_PKEY *pkey,
116 const unsigned char **pder, int derlen)
120 if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
121 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
124 EVP_PKEY_assign_RSA(pkey, rsa);
128 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
130 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
133 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
135 unsigned char *rk = NULL;
137 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
140 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
144 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
145 V_ASN1_NULL, NULL, rk, rklen)) {
146 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
153 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
155 const unsigned char *p;
157 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
159 return old_rsa_priv_decode(pkey, &p, pklen);
162 static int int_rsa_size(const EVP_PKEY *pkey)
164 return RSA_size(pkey->pkey.rsa);
167 static int rsa_bits(const EVP_PKEY *pkey)
169 return BN_num_bits(pkey->pkey.rsa->n);
172 static int rsa_security_bits(const EVP_PKEY *pkey)
174 return RSA_security_bits(pkey->pkey.rsa);
177 static void int_rsa_free(EVP_PKEY *pkey)
179 RSA_free(pkey->pkey.rsa);
182 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
186 int ret = 0, mod_len = 0;
189 mod_len = BN_num_bits(x->n);
191 if (!BIO_indent(bp, off, 128))
195 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len) <= 0)
198 s = "publicExponent:";
200 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
205 if (!ASN1_bn_print(bp, str, x->n, NULL, off))
207 if (!ASN1_bn_print(bp, s, x->e, NULL, off))
210 if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
212 if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
214 if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
216 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
218 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
220 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
228 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
231 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
234 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
237 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
240 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
241 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
245 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
247 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
251 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
252 X509_ALGOR **pmaskHash)
258 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
264 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
269 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
270 X509_ALGOR *maskHash, int indent)
274 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
278 if (BIO_puts(bp, "\n") <= 0)
280 if (!BIO_indent(bp, indent, 128))
282 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
285 if (pss->hashAlgorithm) {
286 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
288 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
291 if (BIO_puts(bp, "\n") <= 0)
294 if (!BIO_indent(bp, indent, 128))
297 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
299 if (pss->maskGenAlgorithm) {
300 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
302 if (BIO_puts(bp, " with ") <= 0)
305 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
307 } else if (BIO_puts(bp, "INVALID") <= 0)
309 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
313 if (!BIO_indent(bp, indent, 128))
315 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
317 if (pss->saltLength) {
318 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
320 } else if (BIO_puts(bp, "14 (default)") <= 0)
324 if (!BIO_indent(bp, indent, 128))
326 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
328 if (pss->trailerField) {
329 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
331 } else if (BIO_puts(bp, "BC (default)") <= 0)
342 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
343 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
345 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
348 X509_ALGOR *maskHash;
349 pss = rsa_pss_decode(sigalg, &maskHash);
350 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
351 RSA_PSS_PARAMS_free(pss);
352 X509_ALGOR_free(maskHash);
355 } else if (!sig && BIO_puts(bp, "\n") <= 0)
358 return X509_signature_dump(bp, sig, indent);
362 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
364 X509_ALGOR *alg = NULL;
367 case ASN1_PKEY_CTRL_PKCS7_SIGN:
369 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
372 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
374 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
376 #ifndef OPENSSL_NO_CMS
377 case ASN1_PKEY_CTRL_CMS_SIGN:
379 return rsa_cms_sign(arg2);
381 return rsa_cms_verify(arg2);
384 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
386 return rsa_cms_encrypt(arg2);
388 return rsa_cms_decrypt(arg2);
391 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
392 *(int *)arg2 = CMS_RECIPINFO_TRANS;
396 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
397 *(int *)arg2 = NID_sha256;
406 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
412 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
413 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
415 if (EVP_MD_type(md) == NID_sha1)
417 *palg = X509_ALGOR_new();
420 X509_ALGOR_set_md(*palg, md);
424 /* Allocate and set MGF1 algorithm ID from EVP_MD */
425 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
427 X509_ALGOR *algtmp = NULL;
428 ASN1_STRING *stmp = NULL;
430 if (EVP_MD_type(mgf1md) == NID_sha1)
432 /* need to embed algorithm ID inside another */
433 if (!rsa_md_to_algor(&algtmp, mgf1md))
435 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
437 *palg = X509_ALGOR_new();
440 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
443 ASN1_STRING_free(stmp);
444 X509_ALGOR_free(algtmp);
450 /* convert algorithm ID to EVP_MD, default SHA1 */
451 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
456 md = EVP_get_digestbyobj(alg->algorithm);
458 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
462 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
463 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
468 /* Check mask and lookup mask hash algorithm */
469 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
470 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
474 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
477 md = EVP_get_digestbyobj(maskHash->algorithm);
479 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
486 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
487 * suitable for setting an AlgorithmIdentifier.
490 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
492 const EVP_MD *sigmd, *mgf1md;
493 RSA_PSS_PARAMS *pss = NULL;
494 ASN1_STRING *os = NULL;
495 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
497 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
499 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
501 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
504 saltlen = EVP_MD_size(sigmd);
505 else if (saltlen == -2) {
506 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
507 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
510 pss = RSA_PSS_PARAMS_new();
514 pss->saltLength = ASN1_INTEGER_new();
515 if (pss->saltLength == NULL)
517 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
520 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
522 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
524 /* Finally create string with pss parameter encoding. */
525 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
529 RSA_PSS_PARAMS_free(pss);
532 ASN1_STRING_free(os);
537 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
538 * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
539 * passed to pkctx instead.
542 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
543 X509_ALGOR *sigalg, EVP_PKEY *pkey)
547 const EVP_MD *mgf1md = NULL, *md = NULL;
549 X509_ALGOR *maskHash;
550 /* Sanity check: make sure it is PSS */
551 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
552 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
555 /* Decode PSS parameters */
556 pss = rsa_pss_decode(sigalg, &maskHash);
559 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
562 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
565 md = rsa_algor_to_md(pss->hashAlgorithm);
569 if (pss->saltLength) {
570 saltlen = ASN1_INTEGER_get(pss->saltLength);
573 * Could perform more salt length sanity checks but the main RSA
574 * routines will trap other invalid values anyway.
577 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
584 * low-level routines support only trailer field 0xbc (value 1) and
585 * PKCS#1 says we should reject any other value anyway.
587 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
588 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
592 /* We have all parameters now set up context */
595 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
598 const EVP_MD *checkmd;
599 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
601 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
602 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
607 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
610 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
613 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
619 RSA_PSS_PARAMS_free(pss);
620 X509_ALGOR_free(maskHash);
624 #ifndef OPENSSL_NO_CMS
625 static int rsa_cms_verify(CMS_SignerInfo *si)
629 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
630 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
631 nid = OBJ_obj2nid(alg->algorithm);
632 if (nid == NID_rsaEncryption)
634 if (nid == NID_rsassaPss)
635 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
636 /* Workaround for some implementation that use a signature OID */
637 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
638 if (nid2 == NID_rsaEncryption)
646 * Customised RSA item verification routine. This is called when a signature
647 * is encountered requiring special handling. We currently only handle PSS.
650 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
651 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
654 /* Sanity check: make sure it is PSS */
655 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
656 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
659 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
666 #ifndef OPENSSL_NO_CMS
667 static int rsa_cms_sign(CMS_SignerInfo *si)
669 int pad_mode = RSA_PKCS1_PADDING;
671 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
672 ASN1_STRING *os = NULL;
673 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
675 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
678 if (pad_mode == RSA_PKCS1_PADDING) {
679 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
682 /* We don't support it */
683 if (pad_mode != RSA_PKCS1_PSS_PADDING)
685 os = rsa_ctx_to_pss(pkctx);
688 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
693 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
694 X509_ALGOR *alg1, X509_ALGOR *alg2,
695 ASN1_BIT_STRING *sig)
698 EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
699 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
701 if (pad_mode == RSA_PKCS1_PADDING)
703 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
704 ASN1_STRING *os1 = NULL;
705 os1 = rsa_ctx_to_pss(pkctx);
708 /* Duplicate parameters if we have to */
710 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
712 ASN1_STRING_free(os1);
715 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
716 V_ASN1_SEQUENCE, os2);
718 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
719 V_ASN1_SEQUENCE, os1);
725 #ifndef OPENSSL_NO_CMS
726 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
727 X509_ALGOR **pmaskHash)
729 RSA_OAEP_PARAMS *pss;
733 pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
739 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
744 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
750 unsigned char *label = NULL;
752 const EVP_MD *mgf1md = NULL, *md = NULL;
753 RSA_OAEP_PARAMS *oaep;
754 X509_ALGOR *maskHash;
755 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
758 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
760 nid = OBJ_obj2nid(cmsalg->algorithm);
761 if (nid == NID_rsaEncryption)
763 if (nid != NID_rsaesOaep) {
764 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
767 /* Decode OAEP parameters */
768 oaep = rsa_oaep_decode(cmsalg, &maskHash);
771 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
775 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
778 md = rsa_algor_to_md(oaep->hashFunc);
782 if (oaep->pSourceFunc) {
783 X509_ALGOR *plab = oaep->pSourceFunc;
784 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
785 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
788 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
789 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
793 label = plab->parameter->value.octet_string->data;
794 /* Stop label being freed when OAEP parameters are freed */
795 plab->parameter->value.octet_string->data = NULL;
796 labellen = plab->parameter->value.octet_string->length;
799 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
801 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
803 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
805 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
811 RSA_OAEP_PARAMS_free(oaep);
812 X509_ALGOR_free(maskHash);
816 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
818 const EVP_MD *md, *mgf1md;
819 RSA_OAEP_PARAMS *oaep = NULL;
820 ASN1_STRING *os = NULL;
822 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
823 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
824 unsigned char *label;
825 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
827 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
830 if (pad_mode == RSA_PKCS1_PADDING) {
831 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
835 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
837 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
839 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
841 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
844 oaep = RSA_OAEP_PARAMS_new();
847 if (!rsa_md_to_algor(&oaep->hashFunc, md))
849 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
852 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
853 oaep->pSourceFunc = X509_ALGOR_new();
854 if (oaep->pSourceFunc == NULL)
858 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
859 ASN1_OCTET_STRING_free(los);
862 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
863 V_ASN1_OCTET_STRING, los);
865 /* create string with pss parameter encoding. */
866 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
868 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
872 RSA_OAEP_PARAMS_free(oaep);
873 ASN1_STRING_free(os);
878 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
882 ASN1_PKEY_SIGPARAM_NULL,
885 "OpenSSL RSA method",