| /* 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); |
| } |
| |