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Diffstat (limited to 'src/crypto/evp/algorithm.c')
-rw-r--r-- | src/crypto/evp/algorithm.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/src/crypto/evp/algorithm.c b/src/crypto/evp/algorithm.c new file mode 100644 index 0000000..ea28dfa --- /dev/null +++ b/src/crypto/evp/algorithm.c @@ -0,0 +1,159 @@ +/* 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" + + +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, + EVP_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, + EVP_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, + EVP_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, + EVP_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, + EVP_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); + return 0; + } + + return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey); +} + |