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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/evp.h>
#include <assert.h>
#include <openssl/asn1.h>
#include <openssl/err.h>
#include <openssl/obj.h>
#include <openssl/x509.h>
#include "internal.h"
/* These functions use error codes under the ASN1 and X509 namespaces for
* compatibility with OpenSSL. */
int EVP_DigestSignAlgorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) {
const EVP_MD *digest;
EVP_PKEY *pkey;
int sign_nid, paramtype;
digest = EVP_MD_CTX_md(ctx);
pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
if (!digest || !pkey) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestSignAlgorithm,
EVP_R_CONTEXT_NOT_INITIALISED);
return 0;
}
if (pkey->ameth->digest_sign_algorithm) {
switch (pkey->ameth->digest_sign_algorithm(ctx, algor)) {
case EVP_DIGEST_SIGN_ALGORITHM_ERROR:
return 0;
case EVP_DIGEST_SIGN_ALGORITHM_SUCCESS:
return 1;
case EVP_DIGEST_SIGN_ALGORITHM_DEFAULT:
/* Use default behavior. */
break;
default:
assert(0);
}
}
/* Default behavior: look up the OID for the algorithm/hash pair and encode
* that. */
if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest),
pkey->ameth->pkey_id)) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestSignAlgorithm,
X509_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
return 0;
}
if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) {
paramtype = V_ASN1_NULL;
} else {
paramtype = V_ASN1_UNDEF;
}
X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL);
return 1;
}
int EVP_DigestVerifyInitFromAlgorithm(EVP_MD_CTX *ctx,
X509_ALGOR *algor,
EVP_PKEY *pkey) {
int digest_nid, pkey_nid;
const EVP_PKEY_ASN1_METHOD *ameth;
const EVP_MD *digest;
/* Convert signature OID into digest and public key OIDs */
if (!OBJ_find_sigid_algs(OBJ_obj2nid(algor->algorithm), &digest_nid,
&pkey_nid)) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestVerifyInitFromAlgorithm,
ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
return 0;
}
/* Check public key OID matches public key type */
ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
if (ameth == NULL || ameth->pkey_id != pkey->ameth->pkey_id) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestVerifyInitFromAlgorithm,
ASN1_R_WRONG_PUBLIC_KEY_TYPE);
return 0;
}
/* NID_undef signals that there are custom parameters to set. */
if (digest_nid == NID_undef) {
if (!pkey->ameth || !pkey->ameth->digest_verify_init_from_algorithm) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestVerifyInitFromAlgorithm,
ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
return 0;
}
return pkey->ameth->digest_verify_init_from_algorithm(ctx, algor, pkey);
}
/* Otherwise, initialize with the digest from the OID. */
digest = EVP_get_digestbynid(digest_nid);
if (digest == NULL) {
OPENSSL_PUT_ERROR(EVP, EVP_DigestVerifyInitFromAlgorithm,
ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
return 0;
}
return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey);
}