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).
61 #include "internal/cryptlib.h"
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"
70 #include "internal/evp_int.h"
72 #ifndef OPENSSL_NO_CMS
73 static int rsa_cms_sign(CMS_SignerInfo
*si
);
74 static int rsa_cms_verify(CMS_SignerInfo
*si
);
75 static int rsa_cms_decrypt(CMS_RecipientInfo
*ri
);
76 static int rsa_cms_encrypt(CMS_RecipientInfo
*ri
);
79 static int rsa_pub_encode(X509_PUBKEY
*pk
, const EVP_PKEY
*pkey
)
81 unsigned char *penc
= NULL
;
83 penclen
= i2d_RSAPublicKey(pkey
->pkey
.rsa
, &penc
);
86 if (X509_PUBKEY_set0_param(pk
, OBJ_nid2obj(EVP_PKEY_RSA
),
87 V_ASN1_NULL
, NULL
, penc
, penclen
))
94 static int rsa_pub_decode(EVP_PKEY
*pkey
, X509_PUBKEY
*pubkey
)
96 const unsigned char *p
;
100 if (!X509_PUBKEY_get0_param(NULL
, &p
, &pklen
, NULL
, pubkey
))
102 if ((rsa
= d2i_RSAPublicKey(NULL
, &p
, pklen
)) == NULL
) {
103 RSAerr(RSA_F_RSA_PUB_DECODE
, ERR_R_RSA_LIB
);
106 EVP_PKEY_assign_RSA(pkey
, rsa
);
110 static int rsa_pub_cmp(const EVP_PKEY
*a
, const EVP_PKEY
*b
)
112 if (BN_cmp(b
->pkey
.rsa
->n
, a
->pkey
.rsa
->n
) != 0
113 || BN_cmp(b
->pkey
.rsa
->e
, a
->pkey
.rsa
->e
) != 0)
118 static int old_rsa_priv_decode(EVP_PKEY
*pkey
,
119 const unsigned char **pder
, int derlen
)
123 if ((rsa
= d2i_RSAPrivateKey(NULL
, pder
, derlen
)) == NULL
) {
124 RSAerr(RSA_F_OLD_RSA_PRIV_DECODE
, ERR_R_RSA_LIB
);
127 EVP_PKEY_assign_RSA(pkey
, rsa
);
131 static int old_rsa_priv_encode(const EVP_PKEY
*pkey
, unsigned char **pder
)
133 return i2d_RSAPrivateKey(pkey
->pkey
.rsa
, pder
);
136 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO
*p8
, const EVP_PKEY
*pkey
)
138 unsigned char *rk
= NULL
;
140 rklen
= i2d_RSAPrivateKey(pkey
->pkey
.rsa
, &rk
);
143 RSAerr(RSA_F_RSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
147 if (!PKCS8_pkey_set0(p8
, OBJ_nid2obj(NID_rsaEncryption
), 0,
148 V_ASN1_NULL
, NULL
, rk
, rklen
)) {
149 RSAerr(RSA_F_RSA_PRIV_ENCODE
, ERR_R_MALLOC_FAILURE
);
156 static int rsa_priv_decode(EVP_PKEY
*pkey
, PKCS8_PRIV_KEY_INFO
*p8
)
158 const unsigned char *p
;
160 if (!PKCS8_pkey_get0(NULL
, &p
, &pklen
, NULL
, p8
))
162 return old_rsa_priv_decode(pkey
, &p
, pklen
);
165 static int int_rsa_size(const EVP_PKEY
*pkey
)
167 return RSA_size(pkey
->pkey
.rsa
);
170 static int rsa_bits(const EVP_PKEY
*pkey
)
172 return BN_num_bits(pkey
->pkey
.rsa
->n
);
175 static int rsa_security_bits(const EVP_PKEY
*pkey
)
177 return RSA_security_bits(pkey
->pkey
.rsa
);
180 static void int_rsa_free(EVP_PKEY
*pkey
)
182 RSA_free(pkey
->pkey
.rsa
);
185 static void update_buflen(const BIGNUM
*b
, size_t *pbuflen
)
190 if (*pbuflen
< (i
= (size_t)BN_num_bytes(b
)))
194 static int do_rsa_print(BIO
*bp
, const RSA
*x
, int off
, int priv
)
198 unsigned char *m
= NULL
;
199 int ret
= 0, mod_len
= 0;
202 update_buflen(x
->n
, &buf_len
);
203 update_buflen(x
->e
, &buf_len
);
206 update_buflen(x
->d
, &buf_len
);
207 update_buflen(x
->p
, &buf_len
);
208 update_buflen(x
->q
, &buf_len
);
209 update_buflen(x
->dmp1
, &buf_len
);
210 update_buflen(x
->dmq1
, &buf_len
);
211 update_buflen(x
->iqmp
, &buf_len
);
214 m
= OPENSSL_malloc(buf_len
+ 10);
216 RSAerr(RSA_F_DO_RSA_PRINT
, ERR_R_MALLOC_FAILURE
);
221 mod_len
= BN_num_bits(x
->n
);
223 if (!BIO_indent(bp
, off
, 128))
227 if (BIO_printf(bp
, "Private-Key: (%d bit)\n", mod_len
)
231 s
= "publicExponent:";
233 if (BIO_printf(bp
, "Public-Key: (%d bit)\n", mod_len
)
239 if (!ASN1_bn_print(bp
, str
, x
->n
, m
, off
))
241 if (!ASN1_bn_print(bp
, s
, x
->e
, m
, off
))
244 if (!ASN1_bn_print(bp
, "privateExponent:", x
->d
, m
, off
))
246 if (!ASN1_bn_print(bp
, "prime1:", x
->p
, m
, off
))
248 if (!ASN1_bn_print(bp
, "prime2:", x
->q
, m
, off
))
250 if (!ASN1_bn_print(bp
, "exponent1:", x
->dmp1
, m
, off
))
252 if (!ASN1_bn_print(bp
, "exponent2:", x
->dmq1
, m
, off
))
254 if (!ASN1_bn_print(bp
, "coefficient:", x
->iqmp
, m
, off
))
263 static int rsa_pub_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
266 return do_rsa_print(bp
, pkey
->pkey
.rsa
, indent
, 0);
269 static int rsa_priv_print(BIO
*bp
, const EVP_PKEY
*pkey
, int indent
,
272 return do_rsa_print(bp
, pkey
->pkey
.rsa
, indent
, 1);
275 /* Given an MGF1 Algorithm ID decode to an Algorithm Identifier */
276 static X509_ALGOR
*rsa_mgf1_decode(X509_ALGOR
*alg
)
280 if (OBJ_obj2nid(alg
->algorithm
) != NID_mgf1
)
282 return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR
),
286 static RSA_PSS_PARAMS
*rsa_pss_decode(const X509_ALGOR
*alg
,
287 X509_ALGOR
**pmaskHash
)
293 pss
= ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS
),
299 *pmaskHash
= rsa_mgf1_decode(pss
->maskGenAlgorithm
);
304 static int rsa_pss_param_print(BIO
*bp
, RSA_PSS_PARAMS
*pss
,
305 X509_ALGOR
*maskHash
, int indent
)
309 if (BIO_puts(bp
, " (INVALID PSS PARAMETERS)\n") <= 0)
313 if (BIO_puts(bp
, "\n") <= 0)
315 if (!BIO_indent(bp
, indent
, 128))
317 if (BIO_puts(bp
, "Hash Algorithm: ") <= 0)
320 if (pss
->hashAlgorithm
) {
321 if (i2a_ASN1_OBJECT(bp
, pss
->hashAlgorithm
->algorithm
) <= 0)
323 } else if (BIO_puts(bp
, "sha1 (default)") <= 0)
326 if (BIO_puts(bp
, "\n") <= 0)
329 if (!BIO_indent(bp
, indent
, 128))
332 if (BIO_puts(bp
, "Mask Algorithm: ") <= 0)
334 if (pss
->maskGenAlgorithm
) {
335 if (i2a_ASN1_OBJECT(bp
, pss
->maskGenAlgorithm
->algorithm
) <= 0)
337 if (BIO_puts(bp
, " with ") <= 0)
340 if (i2a_ASN1_OBJECT(bp
, maskHash
->algorithm
) <= 0)
342 } else if (BIO_puts(bp
, "INVALID") <= 0)
344 } else if (BIO_puts(bp
, "mgf1 with sha1 (default)") <= 0)
348 if (!BIO_indent(bp
, indent
, 128))
350 if (BIO_puts(bp
, "Salt Length: 0x") <= 0)
352 if (pss
->saltLength
) {
353 if (i2a_ASN1_INTEGER(bp
, pss
->saltLength
) <= 0)
355 } else if (BIO_puts(bp
, "14 (default)") <= 0)
359 if (!BIO_indent(bp
, indent
, 128))
361 if (BIO_puts(bp
, "Trailer Field: 0x") <= 0)
363 if (pss
->trailerField
) {
364 if (i2a_ASN1_INTEGER(bp
, pss
->trailerField
) <= 0)
366 } else if (BIO_puts(bp
, "BC (default)") <= 0)
377 static int rsa_sig_print(BIO
*bp
, const X509_ALGOR
*sigalg
,
378 const ASN1_STRING
*sig
, int indent
, ASN1_PCTX
*pctx
)
380 if (OBJ_obj2nid(sigalg
->algorithm
) == NID_rsassaPss
) {
383 X509_ALGOR
*maskHash
;
384 pss
= rsa_pss_decode(sigalg
, &maskHash
);
385 rv
= rsa_pss_param_print(bp
, pss
, maskHash
, indent
);
386 RSA_PSS_PARAMS_free(pss
);
387 X509_ALGOR_free(maskHash
);
390 } else if (!sig
&& BIO_puts(bp
, "\n") <= 0)
393 return X509_signature_dump(bp
, sig
, indent
);
397 static int rsa_pkey_ctrl(EVP_PKEY
*pkey
, int op
, long arg1
, void *arg2
)
399 X509_ALGOR
*alg
= NULL
;
402 case ASN1_PKEY_CTRL_PKCS7_SIGN
:
404 PKCS7_SIGNER_INFO_get0_algs(arg2
, NULL
, NULL
, &alg
);
407 case ASN1_PKEY_CTRL_PKCS7_ENCRYPT
:
409 PKCS7_RECIP_INFO_get0_alg(arg2
, &alg
);
411 #ifndef OPENSSL_NO_CMS
412 case ASN1_PKEY_CTRL_CMS_SIGN
:
414 return rsa_cms_sign(arg2
);
416 return rsa_cms_verify(arg2
);
419 case ASN1_PKEY_CTRL_CMS_ENVELOPE
:
421 return rsa_cms_encrypt(arg2
);
423 return rsa_cms_decrypt(arg2
);
426 case ASN1_PKEY_CTRL_CMS_RI_TYPE
:
427 *(int *)arg2
= CMS_RECIPINFO_TRANS
;
431 case ASN1_PKEY_CTRL_DEFAULT_MD_NID
:
432 *(int *)arg2
= NID_sha256
;
441 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsaEncryption
), V_ASN1_NULL
, 0);
447 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
448 static int rsa_md_to_algor(X509_ALGOR
**palg
, const EVP_MD
*md
)
450 if (EVP_MD_type(md
) == NID_sha1
)
452 *palg
= X509_ALGOR_new();
455 X509_ALGOR_set_md(*palg
, md
);
459 /* Allocate and set MGF1 algorithm ID from EVP_MD */
460 static int rsa_md_to_mgf1(X509_ALGOR
**palg
, const EVP_MD
*mgf1md
)
462 X509_ALGOR
*algtmp
= NULL
;
463 ASN1_STRING
*stmp
= NULL
;
465 if (EVP_MD_type(mgf1md
) == NID_sha1
)
467 /* need to embed algorithm ID inside another */
468 if (!rsa_md_to_algor(&algtmp
, mgf1md
))
470 if (!ASN1_item_pack(algtmp
, ASN1_ITEM_rptr(X509_ALGOR
), &stmp
))
472 *palg
= X509_ALGOR_new();
475 X509_ALGOR_set0(*palg
, OBJ_nid2obj(NID_mgf1
), V_ASN1_SEQUENCE
, stmp
);
478 ASN1_STRING_free(stmp
);
479 X509_ALGOR_free(algtmp
);
485 /* convert algorithm ID to EVP_MD, default SHA1 */
486 static const EVP_MD
*rsa_algor_to_md(X509_ALGOR
*alg
)
491 md
= EVP_get_digestbyobj(alg
->algorithm
);
493 RSAerr(RSA_F_RSA_ALGOR_TO_MD
, RSA_R_UNKNOWN_DIGEST
);
497 /* convert MGF1 algorithm ID to EVP_MD, default SHA1 */
498 static const EVP_MD
*rsa_mgf1_to_md(X509_ALGOR
*alg
, X509_ALGOR
*maskHash
)
503 /* Check mask and lookup mask hash algorithm */
504 if (OBJ_obj2nid(alg
->algorithm
) != NID_mgf1
) {
505 RSAerr(RSA_F_RSA_MGF1_TO_MD
, RSA_R_UNSUPPORTED_MASK_ALGORITHM
);
509 RSAerr(RSA_F_RSA_MGF1_TO_MD
, RSA_R_UNSUPPORTED_MASK_PARAMETER
);
512 md
= EVP_get_digestbyobj(maskHash
->algorithm
);
514 RSAerr(RSA_F_RSA_MGF1_TO_MD
, RSA_R_UNKNOWN_MASK_DIGEST
);
521 * Convert EVP_PKEY_CTX is PSS mode into corresponding algorithm parameter,
522 * suitable for setting an AlgorithmIdentifier.
525 static ASN1_STRING
*rsa_ctx_to_pss(EVP_PKEY_CTX
*pkctx
)
527 const EVP_MD
*sigmd
, *mgf1md
;
528 RSA_PSS_PARAMS
*pss
= NULL
;
529 ASN1_STRING
*os
= NULL
;
530 EVP_PKEY
*pk
= EVP_PKEY_CTX_get0_pkey(pkctx
);
532 if (EVP_PKEY_CTX_get_signature_md(pkctx
, &sigmd
) <= 0)
534 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx
, &mgf1md
) <= 0)
536 if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx
, &saltlen
))
539 saltlen
= EVP_MD_size(sigmd
);
540 else if (saltlen
== -2) {
541 saltlen
= EVP_PKEY_size(pk
) - EVP_MD_size(sigmd
) - 2;
542 if (((EVP_PKEY_bits(pk
) - 1) & 0x7) == 0)
545 pss
= RSA_PSS_PARAMS_new();
549 pss
->saltLength
= ASN1_INTEGER_new();
550 if (pss
->saltLength
== NULL
)
552 if (!ASN1_INTEGER_set(pss
->saltLength
, saltlen
))
555 if (!rsa_md_to_algor(&pss
->hashAlgorithm
, sigmd
))
557 if (!rsa_md_to_mgf1(&pss
->maskGenAlgorithm
, mgf1md
))
559 /* Finally create string with pss parameter encoding. */
560 if (!ASN1_item_pack(pss
, ASN1_ITEM_rptr(RSA_PSS_PARAMS
), &os
))
564 RSA_PSS_PARAMS_free(pss
);
567 ASN1_STRING_free(os
);
572 * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
573 * then the EVP_MD_CTX is setup and initalised. If it is NULL parameters are
574 * passed to pkctx instead.
577 static int rsa_pss_to_ctx(EVP_MD_CTX
*ctx
, EVP_PKEY_CTX
*pkctx
,
578 X509_ALGOR
*sigalg
, EVP_PKEY
*pkey
)
582 const EVP_MD
*mgf1md
= NULL
, *md
= NULL
;
584 X509_ALGOR
*maskHash
;
585 /* Sanity check: make sure it is PSS */
586 if (OBJ_obj2nid(sigalg
->algorithm
) != NID_rsassaPss
) {
587 RSAerr(RSA_F_RSA_PSS_TO_CTX
, RSA_R_UNSUPPORTED_SIGNATURE_TYPE
);
590 /* Decode PSS parameters */
591 pss
= rsa_pss_decode(sigalg
, &maskHash
);
594 RSAerr(RSA_F_RSA_PSS_TO_CTX
, RSA_R_INVALID_PSS_PARAMETERS
);
597 mgf1md
= rsa_mgf1_to_md(pss
->maskGenAlgorithm
, maskHash
);
600 md
= rsa_algor_to_md(pss
->hashAlgorithm
);
604 if (pss
->saltLength
) {
605 saltlen
= ASN1_INTEGER_get(pss
->saltLength
);
608 * Could perform more salt length sanity checks but the main RSA
609 * routines will trap other invalid values anyway.
612 RSAerr(RSA_F_RSA_PSS_TO_CTX
, RSA_R_INVALID_SALT_LENGTH
);
619 * low-level routines support only trailer field 0xbc (value 1) and
620 * PKCS#1 says we should reject any other value anyway.
622 if (pss
->trailerField
&& ASN1_INTEGER_get(pss
->trailerField
) != 1) {
623 RSAerr(RSA_F_RSA_PSS_TO_CTX
, RSA_R_INVALID_TRAILER
);
627 /* We have all parameters now set up context */
630 if (!EVP_DigestVerifyInit(ctx
, &pkctx
, md
, NULL
, pkey
))
633 const EVP_MD
*checkmd
;
634 if (EVP_PKEY_CTX_get_signature_md(pkctx
, &checkmd
) <= 0)
636 if (EVP_MD_type(md
) != EVP_MD_type(checkmd
)) {
637 RSAerr(RSA_F_RSA_PSS_TO_CTX
, RSA_R_DIGEST_DOES_NOT_MATCH
);
642 if (EVP_PKEY_CTX_set_rsa_padding(pkctx
, RSA_PKCS1_PSS_PADDING
) <= 0)
645 if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx
, saltlen
) <= 0)
648 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx
, mgf1md
) <= 0)
654 RSA_PSS_PARAMS_free(pss
);
655 X509_ALGOR_free(maskHash
);
659 #ifndef OPENSSL_NO_CMS
660 static int rsa_cms_verify(CMS_SignerInfo
*si
)
664 EVP_PKEY_CTX
*pkctx
= CMS_SignerInfo_get0_pkey_ctx(si
);
665 CMS_SignerInfo_get0_algs(si
, NULL
, NULL
, NULL
, &alg
);
666 nid
= OBJ_obj2nid(alg
->algorithm
);
667 if (nid
== NID_rsaEncryption
)
669 if (nid
== NID_rsassaPss
)
670 return rsa_pss_to_ctx(NULL
, pkctx
, alg
, NULL
);
671 /* Workaround for some implementation that use a signature OID */
672 if (OBJ_find_sigid_algs(nid
, NULL
, &nid2
)) {
673 if (nid2
== NID_rsaEncryption
)
681 * Customised RSA item verification routine. This is called when a signature
682 * is encountered requiring special handling. We currently only handle PSS.
685 static int rsa_item_verify(EVP_MD_CTX
*ctx
, const ASN1_ITEM
*it
, void *asn
,
686 X509_ALGOR
*sigalg
, ASN1_BIT_STRING
*sig
,
689 /* Sanity check: make sure it is PSS */
690 if (OBJ_obj2nid(sigalg
->algorithm
) != NID_rsassaPss
) {
691 RSAerr(RSA_F_RSA_ITEM_VERIFY
, RSA_R_UNSUPPORTED_SIGNATURE_TYPE
);
694 if (rsa_pss_to_ctx(ctx
, NULL
, sigalg
, pkey
) > 0) {
701 #ifndef OPENSSL_NO_CMS
702 static int rsa_cms_sign(CMS_SignerInfo
*si
)
704 int pad_mode
= RSA_PKCS1_PADDING
;
706 EVP_PKEY_CTX
*pkctx
= CMS_SignerInfo_get0_pkey_ctx(si
);
707 ASN1_STRING
*os
= NULL
;
708 CMS_SignerInfo_get0_algs(si
, NULL
, NULL
, NULL
, &alg
);
710 if (EVP_PKEY_CTX_get_rsa_padding(pkctx
, &pad_mode
) <= 0)
713 if (pad_mode
== RSA_PKCS1_PADDING
) {
714 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsaEncryption
), V_ASN1_NULL
, 0);
717 /* We don't support it */
718 if (pad_mode
!= RSA_PKCS1_PSS_PADDING
)
720 os
= rsa_ctx_to_pss(pkctx
);
723 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsassaPss
), V_ASN1_SEQUENCE
, os
);
728 static int rsa_item_sign(EVP_MD_CTX
*ctx
, const ASN1_ITEM
*it
, void *asn
,
729 X509_ALGOR
*alg1
, X509_ALGOR
*alg2
,
730 ASN1_BIT_STRING
*sig
)
733 EVP_PKEY_CTX
*pkctx
= EVP_MD_CTX_pkey_ctx(ctx
);
734 if (EVP_PKEY_CTX_get_rsa_padding(pkctx
, &pad_mode
) <= 0)
736 if (pad_mode
== RSA_PKCS1_PADDING
)
738 if (pad_mode
== RSA_PKCS1_PSS_PADDING
) {
739 ASN1_STRING
*os1
= NULL
;
740 os1
= rsa_ctx_to_pss(pkctx
);
743 /* Duplicate parameters if we have to */
745 ASN1_STRING
*os2
= ASN1_STRING_dup(os1
);
747 ASN1_STRING_free(os1
);
750 X509_ALGOR_set0(alg2
, OBJ_nid2obj(NID_rsassaPss
),
751 V_ASN1_SEQUENCE
, os2
);
753 X509_ALGOR_set0(alg1
, OBJ_nid2obj(NID_rsassaPss
),
754 V_ASN1_SEQUENCE
, os1
);
760 #ifndef OPENSSL_NO_CMS
761 static RSA_OAEP_PARAMS
*rsa_oaep_decode(const X509_ALGOR
*alg
,
762 X509_ALGOR
**pmaskHash
)
764 RSA_OAEP_PARAMS
*pss
;
768 pss
= ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS
),
774 *pmaskHash
= rsa_mgf1_decode(pss
->maskGenFunc
);
779 static int rsa_cms_decrypt(CMS_RecipientInfo
*ri
)
785 unsigned char *label
= NULL
;
787 const EVP_MD
*mgf1md
= NULL
, *md
= NULL
;
788 RSA_OAEP_PARAMS
*oaep
;
789 X509_ALGOR
*maskHash
;
790 pkctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
793 if (!CMS_RecipientInfo_ktri_get0_algs(ri
, NULL
, NULL
, &cmsalg
))
795 nid
= OBJ_obj2nid(cmsalg
->algorithm
);
796 if (nid
== NID_rsaEncryption
)
798 if (nid
!= NID_rsaesOaep
) {
799 RSAerr(RSA_F_RSA_CMS_DECRYPT
, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE
);
802 /* Decode OAEP parameters */
803 oaep
= rsa_oaep_decode(cmsalg
, &maskHash
);
806 RSAerr(RSA_F_RSA_CMS_DECRYPT
, RSA_R_INVALID_OAEP_PARAMETERS
);
810 mgf1md
= rsa_mgf1_to_md(oaep
->maskGenFunc
, maskHash
);
813 md
= rsa_algor_to_md(oaep
->hashFunc
);
817 if (oaep
->pSourceFunc
) {
818 X509_ALGOR
*plab
= oaep
->pSourceFunc
;
819 if (OBJ_obj2nid(plab
->algorithm
) != NID_pSpecified
) {
820 RSAerr(RSA_F_RSA_CMS_DECRYPT
, RSA_R_UNSUPPORTED_LABEL_SOURCE
);
823 if (plab
->parameter
->type
!= V_ASN1_OCTET_STRING
) {
824 RSAerr(RSA_F_RSA_CMS_DECRYPT
, RSA_R_INVALID_LABEL
);
828 label
= plab
->parameter
->value
.octet_string
->data
;
829 /* Stop label being freed when OAEP parameters are freed */
830 plab
->parameter
->value
.octet_string
->data
= NULL
;
831 labellen
= plab
->parameter
->value
.octet_string
->length
;
834 if (EVP_PKEY_CTX_set_rsa_padding(pkctx
, RSA_PKCS1_OAEP_PADDING
) <= 0)
836 if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx
, md
) <= 0)
838 if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx
, mgf1md
) <= 0)
840 if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx
, label
, labellen
) <= 0)
846 RSA_OAEP_PARAMS_free(oaep
);
847 X509_ALGOR_free(maskHash
);
851 static int rsa_cms_encrypt(CMS_RecipientInfo
*ri
)
853 const EVP_MD
*md
, *mgf1md
;
854 RSA_OAEP_PARAMS
*oaep
= NULL
;
855 ASN1_STRING
*os
= NULL
;
857 EVP_PKEY_CTX
*pkctx
= CMS_RecipientInfo_get0_pkey_ctx(ri
);
858 int pad_mode
= RSA_PKCS1_PADDING
, rv
= 0, labellen
;
859 unsigned char *label
;
860 CMS_RecipientInfo_ktri_get0_algs(ri
, NULL
, NULL
, &alg
);
862 if (EVP_PKEY_CTX_get_rsa_padding(pkctx
, &pad_mode
) <= 0)
865 if (pad_mode
== RSA_PKCS1_PADDING
) {
866 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsaEncryption
), V_ASN1_NULL
, 0);
870 if (pad_mode
!= RSA_PKCS1_OAEP_PADDING
)
872 if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx
, &md
) <= 0)
874 if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx
, &mgf1md
) <= 0)
876 labellen
= EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx
, &label
);
879 oaep
= RSA_OAEP_PARAMS_new();
882 if (!rsa_md_to_algor(&oaep
->hashFunc
, md
))
884 if (!rsa_md_to_mgf1(&oaep
->maskGenFunc
, mgf1md
))
887 ASN1_OCTET_STRING
*los
= ASN1_OCTET_STRING_new();
888 oaep
->pSourceFunc
= X509_ALGOR_new();
889 if (oaep
->pSourceFunc
== NULL
)
893 if (!ASN1_OCTET_STRING_set(los
, label
, labellen
)) {
894 ASN1_OCTET_STRING_free(los
);
897 X509_ALGOR_set0(oaep
->pSourceFunc
, OBJ_nid2obj(NID_pSpecified
),
898 V_ASN1_OCTET_STRING
, los
);
900 /* create string with pss parameter encoding. */
901 if (!ASN1_item_pack(oaep
, ASN1_ITEM_rptr(RSA_OAEP_PARAMS
), &os
))
903 X509_ALGOR_set0(alg
, OBJ_nid2obj(NID_rsaesOaep
), V_ASN1_SEQUENCE
, os
);
907 RSA_OAEP_PARAMS_free(oaep
);
908 ASN1_STRING_free(os
);
913 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths
[] = {
917 ASN1_PKEY_SIGPARAM_NULL
,
920 "OpenSSL RSA method",