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).
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 "asn1_locl.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;
98 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
100 if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) {
101 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
104 EVP_PKEY_assign_RSA(pkey, rsa);
108 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
110 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
111 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
116 static int old_rsa_priv_decode(EVP_PKEY *pkey,
117 const unsigned char **pder, int derlen)
120 if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) {
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 void int_rsa_free(EVP_PKEY *pkey)
174 RSA_free(pkey->pkey.rsa);
177 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
182 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
186 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
190 unsigned char *m = NULL;
191 int ret = 0, mod_len = 0;
194 update_buflen(x->n, &buf_len);
195 update_buflen(x->e, &buf_len);
198 update_buflen(x->d, &buf_len);
199 update_buflen(x->p, &buf_len);
200 update_buflen(x->q, &buf_len);
201 update_buflen(x->dmp1, &buf_len);
202 update_buflen(x->dmq1, &buf_len);
203 update_buflen(x->iqmp, &buf_len);
206 m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
208 RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE);
213 mod_len = BN_num_bits(x->n);
215 if (!BIO_indent(bp, off, 128))
219 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
223 s = "publicExponent:";
225 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len)
231 if (!ASN1_bn_print(bp, str, x->n, m, off))
233 if (!ASN1_bn_print(bp, s, x->e, m, off))
236 if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off))
238 if (!ASN1_bn_print(bp, "prime1:", x->p, m, off))
240 if (!ASN1_bn_print(bp, "prime2:", x->q, m, off))
242 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off))
244 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off))
246 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off))
256 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
259 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
262 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
265 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
268 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
269 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
271 const unsigned char *p;
273 if (alg == NULL || alg->parameter == NULL)
275 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
277 if (alg->parameter->type != V_ASN1_SEQUENCE)
280 p = alg->parameter->value.sequence->data;
281 plen = alg->parameter->value.sequence->length;
282 return d2i_X509_ALGOR(NULL, &p, plen);
285 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
286 X509_ALGOR **pmaskHash)
288 const unsigned char *p;
294 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
296 p = alg->parameter->value.sequence->data;
297 plen = alg->parameter->value.sequence->length;
298 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
303 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
308 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
309 X509_ALGOR *maskHash, int indent)
313 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
317 if (BIO_puts(bp, "\n") <= 0)
319 if (!BIO_indent(bp, indent, 128))
321 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
324 if (pss->hashAlgorithm) {
325 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
327 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
330 if (BIO_puts(bp, "\n") <= 0)
333 if (!BIO_indent(bp, indent, 128))
336 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
338 if (pss->maskGenAlgorithm) {
339 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
341 if (BIO_puts(bp, " with ") <= 0)
344 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
346 } else if (BIO_puts(bp, "INVALID") <= 0)
348 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
352 if (!BIO_indent(bp, indent, 128))
354 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
356 if (pss->saltLength) {
357 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
359 } else if (BIO_puts(bp, "14 (default)") <= 0)
363 if (!BIO_indent(bp, indent, 128))
365 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
367 if (pss->trailerField) {
368 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
370 } else if (BIO_puts(bp, "BC (default)") <= 0)
381 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
382 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
384 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
387 X509_ALGOR *maskHash;
388 pss = rsa_pss_decode(sigalg, &maskHash);
389 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
391 RSA_PSS_PARAMS_free(pss);
393 X509_ALGOR_free(maskHash);
396 } else if (!sig && BIO_puts(bp, "\n") <= 0)
399 return X509_signature_dump(bp, sig, indent);
403 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
405 X509_ALGOR *alg = NULL;
408 case ASN1_PKEY_CTRL_PKCS7_SIGN:
410 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
413 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
415 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
417 #ifndef OPENSSL_NO_CMS
418 case ASN1_PKEY_CTRL_CMS_SIGN:
420 return rsa_cms_sign(arg2);
422 return rsa_cms_verify(arg2);
425 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
427 return rsa_cms_encrypt(arg2);
429 return rsa_cms_decrypt(arg2);
432 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
433 *(int *)arg2 = CMS_RECIPINFO_TRANS;
437 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
438 *(int *)arg2 = NID_sha256;
447 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
453 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
454 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
456 if (EVP_MD_type(md) == NID_sha1)
458 *palg = X509_ALGOR_new();
461 X509_ALGOR_set_md(*palg, md);
465 /* Allocate and set MGF1 algorithm ID from EVP_MD */
466 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
468 X509_ALGOR *algtmp = NULL;
469 ASN1_STRING *stmp = NULL;
471 if (EVP_MD_type(mgf1md) == NID_sha1)
473 /* need to embed algorithm ID inside another */
474 if (!rsa_md_to_algor(&algtmp, mgf1md))
476 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
478 *palg = X509_ALGOR_new();
481 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
485 ASN1_STRING_free(stmp);
487 X509_ALGOR_free(algtmp);
493 /* convert algorithm ID to EVP_MD, default SHA1 */
494 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
499 md = EVP_get_digestbyobj(alg->algorithm);
501 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
505 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
506 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
511 /* Check mask and lookup mask hash algorithm */
512 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
513 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
517 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
520 md = EVP_get_digestbyobj(maskHash->algorithm);
522 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
529 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
530 * suitable for setting an AlgorithmIdentifier.
533 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
535 const EVP_MD *sigmd, *mgf1md;
536 RSA_PSS_PARAMS *pss = NULL;
537 ASN1_STRING *os = NULL;
538 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
540 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
542 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
544 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
547 saltlen = EVP_MD_size(sigmd);
548 else if (saltlen == -2) {
549 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
550 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
553 pss = RSA_PSS_PARAMS_new();
557 pss->saltLength = ASN1_INTEGER_new();
558 if (!pss->saltLength)
560 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
563 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
565 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
567 /* Finally create string with pss parameter encoding. */
568 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
573 RSA_PSS_PARAMS_free(pss);
577 ASN1_STRING_free(os);
582 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
583 * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
584 * passed to pkctx instead.
587 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
588 X509_ALGOR *sigalg, EVP_PKEY *pkey)
592 const EVP_MD *mgf1md = NULL, *md = NULL;
594 X509_ALGOR *maskHash;
595 /* Sanity check: make sure it is PSS */
596 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
597 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
600 /* Decode PSS parameters */
601 pss = rsa_pss_decode(sigalg, &maskHash);
604 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
607 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
610 md = rsa_algor_to_md(pss->hashAlgorithm);
614 if (pss->saltLength) {
615 saltlen = ASN1_INTEGER_get(pss->saltLength);
618 * Could perform more salt length sanity checks but the main RSA
619 * routines will trap other invalid values anyway.
622 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
629 * low-level routines support only trailer field 0xbc (value 1) and
630 * PKCS#1 says we should reject any other value anyway.
632 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
633 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
637 /* We have all parameters now set up context */
640 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
643 const EVP_MD *checkmd;
644 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
646 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
647 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
652 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
655 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
658 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
664 RSA_PSS_PARAMS_free(pss);
666 X509_ALGOR_free(maskHash);
670 #ifndef OPENSSL_NO_CMS
671 static int rsa_cms_verify(CMS_SignerInfo *si)
675 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
676 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
677 nid = OBJ_obj2nid(alg->algorithm);
678 if (nid == NID_rsaEncryption)
680 if (nid == NID_rsassaPss)
681 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
682 /* Workaround for some implementation that use a signature OID */
683 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
684 if (nid2 == NID_rsaEncryption)
692 * Customised RSA item verification routine. This is called when a signature
693 * is encountered requiring special handling. We currently only handle PSS.
696 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
697 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
700 /* Sanity check: make sure it is PSS */
701 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
702 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
705 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
712 #ifndef OPENSSL_NO_CMS
713 static int rsa_cms_sign(CMS_SignerInfo *si)
715 int pad_mode = RSA_PKCS1_PADDING;
717 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
718 ASN1_STRING *os = NULL;
719 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
721 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
724 if (pad_mode == RSA_PKCS1_PADDING) {
725 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
728 /* We don't support it */
729 if (pad_mode != RSA_PKCS1_PSS_PADDING)
731 os = rsa_ctx_to_pss(pkctx);
734 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
739 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
740 X509_ALGOR *alg1, X509_ALGOR *alg2,
741 ASN1_BIT_STRING *sig)
744 EVP_PKEY_CTX *pkctx = ctx->pctx;
745 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
747 if (pad_mode == RSA_PKCS1_PADDING)
749 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
750 ASN1_STRING *os1 = NULL;
751 os1 = rsa_ctx_to_pss(pkctx);
754 /* Duplicate parameters if we have to */
756 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
758 ASN1_STRING_free(os1);
761 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
762 V_ASN1_SEQUENCE, os2);
764 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
765 V_ASN1_SEQUENCE, os1);
771 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
772 X509_ALGOR **pmaskHash)
774 const unsigned char *p;
776 RSA_OAEP_PARAMS *pss;
780 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
782 p = alg->parameter->value.sequence->data;
783 plen = alg->parameter->value.sequence->length;
784 pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
789 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
794 #ifndef OPENSSL_NO_CMS
795 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
801 unsigned char *label = NULL;
803 const EVP_MD *mgf1md = NULL, *md = NULL;
804 RSA_OAEP_PARAMS *oaep;
805 X509_ALGOR *maskHash;
806 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
809 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
811 nid = OBJ_obj2nid(cmsalg->algorithm);
812 if (nid == NID_rsaEncryption)
814 if (nid != NID_rsaesOaep) {
815 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
818 /* Decode OAEP parameters */
819 oaep = rsa_oaep_decode(cmsalg, &maskHash);
822 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
826 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
829 md = rsa_algor_to_md(oaep->hashFunc);
833 if (oaep->pSourceFunc) {
834 X509_ALGOR *plab = oaep->pSourceFunc;
835 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
836 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
839 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
840 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
844 label = plab->parameter->value.octet_string->data;
845 /* Stop label being freed when OAEP parameters are freed */
846 plab->parameter->value.octet_string->data = NULL;
847 labellen = plab->parameter->value.octet_string->length;
850 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
852 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
854 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
856 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
862 RSA_OAEP_PARAMS_free(oaep);
864 X509_ALGOR_free(maskHash);
868 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
870 const EVP_MD *md, *mgf1md;
871 RSA_OAEP_PARAMS *oaep = NULL;
872 ASN1_STRING *os = NULL;
874 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
875 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
876 unsigned char *label;
877 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
879 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
882 if (pad_mode == RSA_PKCS1_PADDING) {
883 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
887 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
889 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
891 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
893 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
896 oaep = RSA_OAEP_PARAMS_new();
899 if (!rsa_md_to_algor(&oaep->hashFunc, md))
901 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
904 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
905 oaep->pSourceFunc = X509_ALGOR_new();
906 if (!oaep->pSourceFunc)
910 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
911 ASN1_OCTET_STRING_free(los);
914 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
915 V_ASN1_OCTET_STRING, los);
917 /* create string with pss parameter encoding. */
918 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
920 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
925 RSA_OAEP_PARAMS_free(oaep);
927 ASN1_STRING_free(os);
932 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
936 ASN1_PKEY_SIGPARAM_NULL,
939 "OpenSSL RSA method",