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277 lines
8.0 KiB
277 lines
8.0 KiB
/* crypto/ecdsa/ecs_lib.c */ |
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/* ==================================================================== |
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* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* openssl-core@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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#include <string.h> |
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#include "ecs_locl.h" |
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#ifndef OPENSSL_NO_ENGINE |
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# include <openssl/engine.h> |
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#endif |
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#include <openssl/err.h> |
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#include <openssl/bn.h> |
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#ifdef OPENSSL_FIPS |
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# include <openssl/fips.h> |
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#endif |
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const char ECDSA_version[] = "ECDSA" OPENSSL_VERSION_PTEXT; |
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static const ECDSA_METHOD *default_ECDSA_method = NULL; |
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static void *ecdsa_data_new(void); |
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static void *ecdsa_data_dup(void *); |
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static void ecdsa_data_free(void *); |
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void ECDSA_set_default_method(const ECDSA_METHOD *meth) |
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{ |
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default_ECDSA_method = meth; |
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} |
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const ECDSA_METHOD *ECDSA_get_default_method(void) |
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{ |
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if (!default_ECDSA_method) { |
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#ifdef OPENSSL_FIPS |
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if (FIPS_mode()) |
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return FIPS_ecdsa_openssl(); |
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else |
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return ECDSA_OpenSSL(); |
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#else |
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default_ECDSA_method = ECDSA_OpenSSL(); |
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#endif |
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} |
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return default_ECDSA_method; |
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} |
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int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth) |
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{ |
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ECDSA_DATA *ecdsa; |
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ecdsa = ecdsa_check(eckey); |
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if (ecdsa == NULL) |
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return 0; |
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#ifndef OPENSSL_NO_ENGINE |
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if (ecdsa->engine) { |
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ENGINE_finish(ecdsa->engine); |
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ecdsa->engine = NULL; |
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} |
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#endif |
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ecdsa->meth = meth; |
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return 1; |
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} |
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static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine) |
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{ |
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ECDSA_DATA *ret; |
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ret = (ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA)); |
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if (ret == NULL) { |
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ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); |
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return (NULL); |
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} |
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ret->init = NULL; |
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ret->meth = ECDSA_get_default_method(); |
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ret->engine = engine; |
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#ifndef OPENSSL_NO_ENGINE |
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if (!ret->engine) |
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ret->engine = ENGINE_get_default_ECDSA(); |
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if (ret->engine) { |
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ret->meth = ENGINE_get_ECDSA(ret->engine); |
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if (!ret->meth) { |
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ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); |
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ENGINE_finish(ret->engine); |
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OPENSSL_free(ret); |
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return NULL; |
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} |
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} |
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#endif |
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ret->flags = ret->meth->flags; |
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); |
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#if 0 |
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if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); |
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OPENSSL_free(ret); |
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ret = NULL; |
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} |
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#endif |
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return (ret); |
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} |
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static void *ecdsa_data_new(void) |
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{ |
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return (void *)ECDSA_DATA_new_method(NULL); |
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} |
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static void *ecdsa_data_dup(void *data) |
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{ |
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ECDSA_DATA *r = (ECDSA_DATA *)data; |
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/* XXX: dummy operation */ |
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if (r == NULL) |
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return NULL; |
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return ecdsa_data_new(); |
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} |
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static void ecdsa_data_free(void *data) |
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{ |
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ECDSA_DATA *r = (ECDSA_DATA *)data; |
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#ifndef OPENSSL_NO_ENGINE |
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if (r->engine) |
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ENGINE_finish(r->engine); |
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#endif |
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data); |
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OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA)); |
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OPENSSL_free(r); |
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} |
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ECDSA_DATA *ecdsa_check(EC_KEY *key) |
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{ |
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ECDSA_DATA *ecdsa_data; |
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void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup, |
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ecdsa_data_free, ecdsa_data_free); |
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if (data == NULL) { |
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ecdsa_data = (ECDSA_DATA *)ecdsa_data_new(); |
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if (ecdsa_data == NULL) |
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return NULL; |
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data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data, |
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ecdsa_data_dup, ecdsa_data_free, |
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ecdsa_data_free); |
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if (data != NULL) { |
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/* |
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* Another thread raced us to install the key_method data and |
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* won. |
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*/ |
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ecdsa_data_free(ecdsa_data); |
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ecdsa_data = (ECDSA_DATA *)data; |
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} |
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} else |
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ecdsa_data = (ECDSA_DATA *)data; |
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#ifdef OPENSSL_FIPS |
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if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD) |
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&& !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW)) { |
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ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD); |
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return NULL; |
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} |
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#endif |
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return ecdsa_data; |
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} |
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int ECDSA_size(const EC_KEY *r) |
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{ |
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int ret, i; |
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ASN1_INTEGER bs; |
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BIGNUM *order = NULL; |
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unsigned char buf[4]; |
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const EC_GROUP *group; |
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if (r == NULL) |
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return 0; |
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group = EC_KEY_get0_group(r); |
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if (group == NULL) |
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return 0; |
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if ((order = BN_new()) == NULL) |
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return 0; |
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if (!EC_GROUP_get_order(group, order, NULL)) { |
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BN_clear_free(order); |
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return 0; |
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} |
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i = BN_num_bits(order); |
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bs.length = (i + 7) / 8; |
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bs.data = buf; |
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bs.type = V_ASN1_INTEGER; |
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/* If the top bit is set the asn1 encoding is 1 larger. */ |
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buf[0] = 0xff; |
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i = i2d_ASN1_INTEGER(&bs, NULL); |
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i += i; /* r and s */ |
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ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE); |
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BN_clear_free(order); |
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return (ret); |
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} |
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int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, |
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CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) |
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{ |
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return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp, |
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new_func, dup_func, free_func); |
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} |
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int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg) |
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{ |
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ECDSA_DATA *ecdsa; |
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ecdsa = ecdsa_check(d); |
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if (ecdsa == NULL) |
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return 0; |
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return (CRYPTO_set_ex_data(&ecdsa->ex_data, idx, arg)); |
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} |
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void *ECDSA_get_ex_data(EC_KEY *d, int idx) |
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{ |
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ECDSA_DATA *ecdsa; |
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ecdsa = ecdsa_check(d); |
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if (ecdsa == NULL) |
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return NULL; |
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return (CRYPTO_get_ex_data(&ecdsa->ex_data, idx)); |
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}
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