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 static int rsa_cms_sign(CMS_SignerInfo *si);
72 static int rsa_cms_verify(CMS_SignerInfo *si);
73 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
74 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;
96 if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, NULL, pubkey))
98 if (!(rsa = d2i_RSAPublicKey(NULL, &p, pklen))) {
99 RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
102 EVP_PKEY_assign_RSA(pkey, rsa);
106 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
108 if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
109 || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
114 static int old_rsa_priv_decode(EVP_PKEY *pkey,
115 const unsigned char **pder, int derlen)
118 if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) {
119 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
122 EVP_PKEY_assign_RSA(pkey, rsa);
126 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
128 return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
131 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
133 unsigned char *rk = NULL;
135 rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
138 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
142 if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_rsaEncryption), 0,
143 V_ASN1_NULL, NULL, rk, rklen)) {
144 RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
151 static int rsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
153 const unsigned char *p;
155 if (!PKCS8_pkey_get0(NULL, &p, &pklen, NULL, p8))
157 return old_rsa_priv_decode(pkey, &p, pklen);
160 static int int_rsa_size(const EVP_PKEY *pkey)
162 return RSA_size(pkey->pkey.rsa);
165 static int rsa_bits(const EVP_PKEY *pkey)
167 return BN_num_bits(pkey->pkey.rsa->n);
170 static void int_rsa_free(EVP_PKEY *pkey)
172 RSA_free(pkey->pkey.rsa);
175 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
180 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
184 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
188 unsigned char *m = NULL;
189 int ret = 0, mod_len = 0;
192 update_buflen(x->n, &buf_len);
193 update_buflen(x->e, &buf_len);
196 update_buflen(x->d, &buf_len);
197 update_buflen(x->p, &buf_len);
198 update_buflen(x->q, &buf_len);
199 update_buflen(x->dmp1, &buf_len);
200 update_buflen(x->dmq1, &buf_len);
201 update_buflen(x->iqmp, &buf_len);
204 m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
206 RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE);
211 mod_len = BN_num_bits(x->n);
213 if (!BIO_indent(bp, off, 128))
217 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
221 s = "publicExponent:";
223 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len)
229 if (!ASN1_bn_print(bp, str, x->n, m, off))
231 if (!ASN1_bn_print(bp, s, x->e, m, off))
234 if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off))
236 if (!ASN1_bn_print(bp, "prime1:", x->p, m, off))
238 if (!ASN1_bn_print(bp, "prime2:", x->q, m, off))
240 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off))
242 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off))
244 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off))
254 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
257 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
260 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
263 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
266 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
267 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
269 const unsigned char *p;
273 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
275 if (alg->parameter->type != V_ASN1_SEQUENCE)
278 p = alg->parameter->value.sequence->data;
279 plen = alg->parameter->value.sequence->length;
280 return d2i_X509_ALGOR(NULL, &p, plen);
283 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
284 X509_ALGOR **pmaskHash)
286 const unsigned char *p;
292 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
294 p = alg->parameter->value.sequence->data;
295 plen = alg->parameter->value.sequence->length;
296 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
301 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
306 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
307 X509_ALGOR *maskHash, int indent)
311 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
315 if (BIO_puts(bp, "\n") <= 0)
317 if (!BIO_indent(bp, indent, 128))
319 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
322 if (pss->hashAlgorithm) {
323 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
325 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
328 if (BIO_puts(bp, "\n") <= 0)
331 if (!BIO_indent(bp, indent, 128))
334 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
336 if (pss->maskGenAlgorithm) {
337 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
339 if (BIO_puts(bp, " with ") <= 0)
342 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
344 } else if (BIO_puts(bp, "INVALID") <= 0)
346 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
350 if (!BIO_indent(bp, indent, 128))
352 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
354 if (pss->saltLength) {
355 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
357 } else if (BIO_puts(bp, "14 (default)") <= 0)
361 if (!BIO_indent(bp, indent, 128))
363 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
365 if (pss->trailerField) {
366 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
368 } else if (BIO_puts(bp, "BC (default)") <= 0)
379 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
380 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
382 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
385 X509_ALGOR *maskHash;
386 pss = rsa_pss_decode(sigalg, &maskHash);
387 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
389 RSA_PSS_PARAMS_free(pss);
391 X509_ALGOR_free(maskHash);
394 } else if (!sig && BIO_puts(bp, "\n") <= 0)
397 return X509_signature_dump(bp, sig, indent);
401 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
403 X509_ALGOR *alg = NULL;
406 case ASN1_PKEY_CTRL_PKCS7_SIGN:
408 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
411 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
413 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
415 #ifndef OPENSSL_NO_CMS
416 case ASN1_PKEY_CTRL_CMS_SIGN:
418 return rsa_cms_sign(arg2);
420 return rsa_cms_verify(arg2);
423 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
425 return rsa_cms_encrypt(arg2);
427 return rsa_cms_decrypt(arg2);
430 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
431 *(int *)arg2 = CMS_RECIPINFO_TRANS;
435 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
436 *(int *)arg2 = NID_sha256;
445 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
451 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
452 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
454 if (EVP_MD_type(md) == NID_sha1)
456 *palg = X509_ALGOR_new();
459 X509_ALGOR_set_md(*palg, md);
463 /* Allocate and set MGF1 algorithm ID from EVP_MD */
464 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
466 X509_ALGOR *algtmp = NULL;
467 ASN1_STRING *stmp = NULL;
469 if (EVP_MD_type(mgf1md) == NID_sha1)
471 /* need to embed algorithm ID inside another */
472 if (!rsa_md_to_algor(&algtmp, mgf1md))
474 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
476 *palg = X509_ALGOR_new();
479 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
483 ASN1_STRING_free(stmp);
485 X509_ALGOR_free(algtmp);
491 /* convert algorithm ID to EVP_MD, default SHA1 */
492 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
497 md = EVP_get_digestbyobj(alg->algorithm);
499 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
503 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
504 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
509 /* Check mask and lookup mask hash algorithm */
510 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
511 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
515 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
518 md = EVP_get_digestbyobj(maskHash->algorithm);
520 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
527 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
528 * suitable for setting an AlgorithmIdentifier.
531 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
533 const EVP_MD *sigmd, *mgf1md;
534 RSA_PSS_PARAMS *pss = NULL;
535 ASN1_STRING *os = NULL;
536 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
538 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
540 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
542 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
545 saltlen = EVP_MD_size(sigmd);
546 else if (saltlen == -2) {
547 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
548 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
551 pss = RSA_PSS_PARAMS_new();
555 pss->saltLength = ASN1_INTEGER_new();
556 if (!pss->saltLength)
558 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
561 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
563 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
565 /* Finally create string with pss parameter encoding. */
566 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
571 RSA_PSS_PARAMS_free(pss);
575 ASN1_STRING_free(os);
580 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
581 * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
582 * passed to pkctx instead.
585 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
586 X509_ALGOR *sigalg, EVP_PKEY *pkey)
590 const EVP_MD *mgf1md = NULL, *md = NULL;
592 X509_ALGOR *maskHash;
593 /* Sanity check: make sure it is PSS */
594 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
595 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
598 /* Decode PSS parameters */
599 pss = rsa_pss_decode(sigalg, &maskHash);
602 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
605 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
608 md = rsa_algor_to_md(pss->hashAlgorithm);
612 if (pss->saltLength) {
613 saltlen = ASN1_INTEGER_get(pss->saltLength);
616 * Could perform more salt length sanity checks but the main RSA
617 * routines will trap other invalid values anyway.
620 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
627 * low-level routines support only trailer field 0xbc (value 1) and
628 * PKCS#1 says we should reject any other value anyway.
630 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
631 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
635 /* We have all parameters now set up context */
638 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
641 const EVP_MD *checkmd;
642 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
644 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
645 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
650 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
653 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
656 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
662 RSA_PSS_PARAMS_free(pss);
664 X509_ALGOR_free(maskHash);
668 static int rsa_cms_verify(CMS_SignerInfo *si)
672 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
673 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
674 nid = OBJ_obj2nid(alg->algorithm);
675 if (nid == NID_rsaEncryption)
677 if (nid == NID_rsassaPss)
678 return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
679 /* Workaround for some implementation that use a signature OID */
680 if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
681 if (nid2 == NID_rsaEncryption)
688 * Customised RSA item verification routine. This is called when a signature
689 * is encountered requiring special handling. We currently only handle PSS.
692 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
693 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
696 /* Sanity check: make sure it is PSS */
697 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
698 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
701 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
708 static int rsa_cms_sign(CMS_SignerInfo *si)
710 int pad_mode = RSA_PKCS1_PADDING;
712 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
713 ASN1_STRING *os = NULL;
714 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
716 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
719 if (pad_mode == RSA_PKCS1_PADDING) {
720 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
723 /* We don't support it */
724 if (pad_mode != RSA_PKCS1_PSS_PADDING)
726 os = rsa_ctx_to_pss(pkctx);
729 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
733 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
734 X509_ALGOR *alg1, X509_ALGOR *alg2,
735 ASN1_BIT_STRING *sig)
738 EVP_PKEY_CTX *pkctx = ctx->pctx;
739 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
741 if (pad_mode == RSA_PKCS1_PADDING)
743 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
744 ASN1_STRING *os1 = NULL;
745 os1 = rsa_ctx_to_pss(pkctx);
748 /* Duplicate parameters if we have to */
750 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
752 ASN1_STRING_free(os1);
755 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
756 V_ASN1_SEQUENCE, os2);
758 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
759 V_ASN1_SEQUENCE, os1);
765 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
766 X509_ALGOR **pmaskHash)
768 const unsigned char *p;
770 RSA_OAEP_PARAMS *pss;
774 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
776 p = alg->parameter->value.sequence->data;
777 plen = alg->parameter->value.sequence->length;
778 pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
783 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
788 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
794 unsigned char *label = NULL;
796 const EVP_MD *mgf1md = NULL, *md = NULL;
797 RSA_OAEP_PARAMS *oaep;
798 X509_ALGOR *maskHash;
799 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
802 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
804 nid = OBJ_obj2nid(cmsalg->algorithm);
805 if (nid == NID_rsaEncryption)
807 if (nid != NID_rsaesOaep) {
808 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
811 /* Decode OAEP parameters */
812 oaep = rsa_oaep_decode(cmsalg, &maskHash);
815 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
819 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
822 md = rsa_algor_to_md(oaep->hashFunc);
826 if (oaep->pSourceFunc) {
827 X509_ALGOR *plab = oaep->pSourceFunc;
828 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
829 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
832 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
833 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
837 label = plab->parameter->value.octet_string->data;
838 /* Stop label being freed when OAEP parameters are freed */
839 plab->parameter->value.octet_string->data = NULL;
840 labellen = plab->parameter->value.octet_string->length;
843 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
845 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
847 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
849 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
855 RSA_OAEP_PARAMS_free(oaep);
857 X509_ALGOR_free(maskHash);
861 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
863 const EVP_MD *md, *mgf1md;
864 RSA_OAEP_PARAMS *oaep = NULL;
865 ASN1_STRING *os = NULL;
867 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
868 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
869 unsigned char *label;
870 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
872 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
875 if (pad_mode == RSA_PKCS1_PADDING) {
876 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
880 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
882 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
884 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
886 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
889 oaep = RSA_OAEP_PARAMS_new();
892 if (!rsa_md_to_algor(&oaep->hashFunc, md))
894 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
897 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
898 oaep->pSourceFunc = X509_ALGOR_new();
899 if (!oaep->pSourceFunc)
903 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
904 ASN1_OCTET_STRING_free(los);
907 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
908 V_ASN1_OCTET_STRING, los);
910 /* create string with pss parameter encoding. */
911 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
913 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
918 RSA_OAEP_PARAMS_free(oaep);
920 ASN1_STRING_free(os);
924 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
928 ASN1_PKEY_SIGPARAM_NULL,
931 "OpenSSL RSA method",