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 "internal/asn1_int.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 int rsa_security_bits(const EVP_PKEY *pkey)
172 return RSA_security_bits(pkey->pkey.rsa);
175 static void int_rsa_free(EVP_PKEY *pkey)
177 RSA_free(pkey->pkey.rsa);
180 static void update_buflen(const BIGNUM *b, size_t *pbuflen)
185 if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
189 static int do_rsa_print(BIO *bp, const RSA *x, int off, int priv)
193 unsigned char *m = NULL;
194 int ret = 0, mod_len = 0;
197 update_buflen(x->n, &buf_len);
198 update_buflen(x->e, &buf_len);
201 update_buflen(x->d, &buf_len);
202 update_buflen(x->p, &buf_len);
203 update_buflen(x->q, &buf_len);
204 update_buflen(x->dmp1, &buf_len);
205 update_buflen(x->dmq1, &buf_len);
206 update_buflen(x->iqmp, &buf_len);
209 m = (unsigned char *)OPENSSL_malloc(buf_len + 10);
211 RSAerr(RSA_F_DO_RSA_PRINT, ERR_R_MALLOC_FAILURE);
216 mod_len = BN_num_bits(x->n);
218 if (!BIO_indent(bp, off, 128))
222 if (BIO_printf(bp, "Private-Key: (%d bit)\n", mod_len)
226 s = "publicExponent:";
228 if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len)
234 if (!ASN1_bn_print(bp, str, x->n, m, off))
236 if (!ASN1_bn_print(bp, s, x->e, m, off))
239 if (!ASN1_bn_print(bp, "privateExponent:", x->d, m, off))
241 if (!ASN1_bn_print(bp, "prime1:", x->p, m, off))
243 if (!ASN1_bn_print(bp, "prime2:", x->q, m, off))
245 if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, m, off))
247 if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, m, off))
249 if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, m, off))
259 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
262 return do_rsa_print(bp, pkey->pkey.rsa, indent, 0);
265 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
268 return do_rsa_print(bp, pkey->pkey.rsa, indent, 1);
271 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
272 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
274 const unsigned char *p;
278 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
280 if (alg->parameter->type != V_ASN1_SEQUENCE)
283 p = alg->parameter->value.sequence->data;
284 plen = alg->parameter->value.sequence->length;
285 return d2i_X509_ALGOR(NULL, &p, plen);
288 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
289 X509_ALGOR **pmaskHash)
291 const unsigned char *p;
297 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
299 p = alg->parameter->value.sequence->data;
300 plen = alg->parameter->value.sequence->length;
301 pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);
306 *pmaskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
311 static int rsa_pss_param_print(BIO *bp, RSA_PSS_PARAMS *pss,
312 X509_ALGOR *maskHash, int indent)
316 if (BIO_puts(bp, " (INVALID PSS PARAMETERS)\n") <= 0)
320 if (BIO_puts(bp, "\n") <= 0)
322 if (!BIO_indent(bp, indent, 128))
324 if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
327 if (pss->hashAlgorithm) {
328 if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
330 } else if (BIO_puts(bp, "sha1 (default)") <= 0)
333 if (BIO_puts(bp, "\n") <= 0)
336 if (!BIO_indent(bp, indent, 128))
339 if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
341 if (pss->maskGenAlgorithm) {
342 if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
344 if (BIO_puts(bp, " with ") <= 0)
347 if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
349 } else if (BIO_puts(bp, "INVALID") <= 0)
351 } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0)
355 if (!BIO_indent(bp, indent, 128))
357 if (BIO_puts(bp, "Salt Length: 0x") <= 0)
359 if (pss->saltLength) {
360 if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
362 } else if (BIO_puts(bp, "14 (default)") <= 0)
366 if (!BIO_indent(bp, indent, 128))
368 if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
370 if (pss->trailerField) {
371 if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
373 } else if (BIO_puts(bp, "BC (default)") <= 0)
384 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
385 const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
387 if (OBJ_obj2nid(sigalg->algorithm) == NID_rsassaPss) {
390 X509_ALGOR *maskHash;
391 pss = rsa_pss_decode(sigalg, &maskHash);
392 rv = rsa_pss_param_print(bp, pss, maskHash, indent);
394 RSA_PSS_PARAMS_free(pss);
396 X509_ALGOR_free(maskHash);
399 } else if (!sig && BIO_puts(bp, "\n") <= 0)
402 return X509_signature_dump(bp, sig, indent);
406 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
408 X509_ALGOR *alg = NULL;
411 case ASN1_PKEY_CTRL_PKCS7_SIGN:
413 PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
416 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
418 PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
420 #ifndef OPENSSL_NO_CMS
421 case ASN1_PKEY_CTRL_CMS_SIGN:
423 return rsa_cms_sign(arg2);
425 return rsa_cms_verify(arg2);
428 case ASN1_PKEY_CTRL_CMS_ENVELOPE:
430 return rsa_cms_encrypt(arg2);
432 return rsa_cms_decrypt(arg2);
435 case ASN1_PKEY_CTRL_CMS_RI_TYPE:
436 *(int *)arg2 = CMS_RECIPINFO_TRANS;
440 case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
441 *(int *)arg2 = NID_sha256;
450 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
456 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
457 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
459 if (EVP_MD_type(md) == NID_sha1)
461 *palg = X509_ALGOR_new();
464 X509_ALGOR_set_md(*palg, md);
468 /* Allocate and set MGF1 algorithm ID from EVP_MD */
469 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
471 X509_ALGOR *algtmp = NULL;
472 ASN1_STRING *stmp = NULL;
474 if (EVP_MD_type(mgf1md) == NID_sha1)
476 /* need to embed algorithm ID inside another */
477 if (!rsa_md_to_algor(&algtmp, mgf1md))
479 if (!ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp))
481 *palg = X509_ALGOR_new();
484 X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
487 ASN1_STRING_free(stmp);
489 X509_ALGOR_free(algtmp);
495 /* convert algorithm ID to EVP_MD, default SHA1 */
496 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
501 md = EVP_get_digestbyobj(alg->algorithm);
503 RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
507 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
508 static const EVP_MD *rsa_mgf1_to_md(X509_ALGOR *alg, X509_ALGOR *maskHash)
513 /* Check mask and lookup mask hash algorithm */
514 if (OBJ_obj2nid(alg->algorithm) != NID_mgf1) {
515 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_ALGORITHM);
519 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNSUPPORTED_MASK_PARAMETER);
522 md = EVP_get_digestbyobj(maskHash->algorithm);
524 RSAerr(RSA_F_RSA_MGF1_TO_MD, RSA_R_UNKNOWN_MASK_DIGEST);
531 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
532 * suitable for setting an AlgorithmIdentifier.
535 static ASN1_STRING *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
537 const EVP_MD *sigmd, *mgf1md;
538 RSA_PSS_PARAMS *pss = NULL;
539 ASN1_STRING *os = NULL;
540 EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
542 if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
544 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
546 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
549 saltlen = EVP_MD_size(sigmd);
550 else if (saltlen == -2) {
551 saltlen = EVP_PKEY_size(pk) - EVP_MD_size(sigmd) - 2;
552 if (((EVP_PKEY_bits(pk) - 1) & 0x7) == 0)
555 pss = RSA_PSS_PARAMS_new();
559 pss->saltLength = ASN1_INTEGER_new();
560 if (!pss->saltLength)
562 if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
565 if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
567 if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
569 /* Finally create string with pss parameter encoding. */
570 if (!ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), &os))
575 RSA_PSS_PARAMS_free(pss);
578 ASN1_STRING_free(os);
583 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
584 * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
585 * passed to pkctx instead.
588 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
589 X509_ALGOR *sigalg, EVP_PKEY *pkey)
593 const EVP_MD *mgf1md = NULL, *md = NULL;
595 X509_ALGOR *maskHash;
596 /* Sanity check: make sure it is PSS */
597 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
598 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
601 /* Decode PSS parameters */
602 pss = rsa_pss_decode(sigalg, &maskHash);
605 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
608 mgf1md = rsa_mgf1_to_md(pss->maskGenAlgorithm, maskHash);
611 md = rsa_algor_to_md(pss->hashAlgorithm);
615 if (pss->saltLength) {
616 saltlen = ASN1_INTEGER_get(pss->saltLength);
619 * Could perform more salt length sanity checks but the main RSA
620 * routines will trap other invalid values anyway.
623 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_SALT_LENGTH);
630 * low-level routines support only trailer field 0xbc (value 1) and
631 * PKCS#1 says we should reject any other value anyway.
633 if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
634 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_TRAILER);
638 /* We have all parameters now set up context */
641 if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
644 const EVP_MD *checkmd;
645 if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
647 if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
648 RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
653 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
656 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
659 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
665 RSA_PSS_PARAMS_free(pss);
667 X509_ALGOR_free(maskHash);
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)
691 * Customised RSA item verification routine. This is called when a signature
692 * is encountered requiring special handling. We currently only handle PSS.
695 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
696 X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
699 /* Sanity check: make sure it is PSS */
700 if (OBJ_obj2nid(sigalg->algorithm) != NID_rsassaPss) {
701 RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
704 if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
711 static int rsa_cms_sign(CMS_SignerInfo *si)
713 int pad_mode = RSA_PKCS1_PADDING;
715 EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
716 ASN1_STRING *os = NULL;
717 CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
719 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
722 if (pad_mode == RSA_PKCS1_PADDING) {
723 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
726 /* We don't support it */
727 if (pad_mode != RSA_PKCS1_PSS_PADDING)
729 os = rsa_ctx_to_pss(pkctx);
732 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsassaPss), V_ASN1_SEQUENCE, os);
736 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
737 X509_ALGOR *alg1, X509_ALGOR *alg2,
738 ASN1_BIT_STRING *sig)
741 EVP_PKEY_CTX *pkctx = ctx->pctx;
742 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
744 if (pad_mode == RSA_PKCS1_PADDING)
746 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
747 ASN1_STRING *os1 = NULL;
748 os1 = rsa_ctx_to_pss(pkctx);
751 /* Duplicate parameters if we have to */
753 ASN1_STRING *os2 = ASN1_STRING_dup(os1);
755 ASN1_STRING_free(os1);
758 X509_ALGOR_set0(alg2, OBJ_nid2obj(NID_rsassaPss),
759 V_ASN1_SEQUENCE, os2);
761 X509_ALGOR_set0(alg1, OBJ_nid2obj(NID_rsassaPss),
762 V_ASN1_SEQUENCE, os1);
768 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg,
769 X509_ALGOR **pmaskHash)
771 const unsigned char *p;
773 RSA_OAEP_PARAMS *pss;
777 if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
779 p = alg->parameter->value.sequence->data;
780 plen = alg->parameter->value.sequence->length;
781 pss = d2i_RSA_OAEP_PARAMS(NULL, &p, plen);
786 *pmaskHash = rsa_mgf1_decode(pss->maskGenFunc);
791 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
797 unsigned char *label = NULL;
799 const EVP_MD *mgf1md = NULL, *md = NULL;
800 RSA_OAEP_PARAMS *oaep;
801 X509_ALGOR *maskHash;
802 pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
805 if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
807 nid = OBJ_obj2nid(cmsalg->algorithm);
808 if (nid == NID_rsaEncryption)
810 if (nid != NID_rsaesOaep) {
811 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
814 /* Decode OAEP parameters */
815 oaep = rsa_oaep_decode(cmsalg, &maskHash);
818 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
822 mgf1md = rsa_mgf1_to_md(oaep->maskGenFunc, maskHash);
825 md = rsa_algor_to_md(oaep->hashFunc);
829 if (oaep->pSourceFunc) {
830 X509_ALGOR *plab = oaep->pSourceFunc;
831 if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
832 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
835 if (plab->parameter->type != V_ASN1_OCTET_STRING) {
836 RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
840 label = plab->parameter->value.octet_string->data;
841 /* Stop label being freed when OAEP parameters are freed */
842 plab->parameter->value.octet_string->data = NULL;
843 labellen = plab->parameter->value.octet_string->length;
846 if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
848 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
850 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
852 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
858 RSA_OAEP_PARAMS_free(oaep);
860 X509_ALGOR_free(maskHash);
864 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
866 const EVP_MD *md, *mgf1md;
867 RSA_OAEP_PARAMS *oaep = NULL;
868 ASN1_STRING *os = NULL;
870 EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
871 int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
872 unsigned char *label;
873 CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg);
875 if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
878 if (pad_mode == RSA_PKCS1_PADDING) {
879 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
883 if (pad_mode != RSA_PKCS1_OAEP_PADDING)
885 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
887 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
889 labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
892 oaep = RSA_OAEP_PARAMS_new();
895 if (!rsa_md_to_algor(&oaep->hashFunc, md))
897 if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
900 ASN1_OCTET_STRING *los = ASN1_OCTET_STRING_new();
901 oaep->pSourceFunc = X509_ALGOR_new();
902 if (!oaep->pSourceFunc)
906 if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
907 ASN1_OCTET_STRING_free(los);
910 X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
911 V_ASN1_OCTET_STRING, los);
913 /* create string with pss parameter encoding. */
914 if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
916 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
921 RSA_OAEP_PARAMS_free(oaep);
922 ASN1_STRING_free(os);
926 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[] = {
930 ASN1_PKEY_SIGPARAM_NULL,
933 "OpenSSL RSA method",