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",