diff options
Diffstat (limited to 'openssl/crypto/ecdsa/ecs_lib.c')
| -rw-r--r-- | openssl/crypto/ecdsa/ecs_lib.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/openssl/crypto/ecdsa/ecs_lib.c b/openssl/crypto/ecdsa/ecs_lib.c new file mode 100644 index 000000000..85e8a3a7e --- /dev/null +++ b/openssl/crypto/ecdsa/ecs_lib.c @@ -0,0 +1,261 @@ +/* crypto/ecdsa/ecs_lib.c */ +/* ==================================================================== + * Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved. + * + * 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 above 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 acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <string.h> +#include "ecs_locl.h" +#ifndef OPENSSL_NO_ENGINE +#include <openssl/engine.h> +#endif +#include <openssl/err.h> +#include <openssl/bn.h> + +const char ECDSA_version[]="ECDSA" OPENSSL_VERSION_PTEXT; + +static const ECDSA_METHOD *default_ECDSA_method = NULL; + +static void *ecdsa_data_new(void); +static void *ecdsa_data_dup(void *); +static void ecdsa_data_free(void *); + +void ECDSA_set_default_method(const ECDSA_METHOD *meth) +{ + default_ECDSA_method = meth; +} + +const ECDSA_METHOD *ECDSA_get_default_method(void) +{ + if(!default_ECDSA_method) + default_ECDSA_method = ECDSA_OpenSSL(); + return default_ECDSA_method; +} + +int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth) +{ + const ECDSA_METHOD *mtmp; + ECDSA_DATA *ecdsa; + + ecdsa = ecdsa_check(eckey); + + if (ecdsa == NULL) + return 0; + + mtmp = ecdsa->meth; +#ifndef OPENSSL_NO_ENGINE + if (ecdsa->engine) + { + ENGINE_finish(ecdsa->engine); + ecdsa->engine = NULL; + } +#endif + ecdsa->meth = meth; + + return 1; +} + +static ECDSA_DATA *ECDSA_DATA_new_method(ENGINE *engine) +{ + ECDSA_DATA *ret; + + ret=(ECDSA_DATA *)OPENSSL_malloc(sizeof(ECDSA_DATA)); + if (ret == NULL) + { + ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return(NULL); + } + + ret->init = NULL; + + ret->meth = ECDSA_get_default_method(); + ret->engine = engine; +#ifndef OPENSSL_NO_ENGINE + if (!ret->engine) + ret->engine = ENGINE_get_default_ECDSA(); + if (ret->engine) + { + ret->meth = ENGINE_get_ECDSA(ret->engine); + if (!ret->meth) + { + ECDSAerr(ECDSA_F_ECDSA_DATA_NEW_METHOD, ERR_R_ENGINE_LIB); + ENGINE_finish(ret->engine); + OPENSSL_free(ret); + return NULL; + } + } +#endif + + ret->flags = ret->meth->flags; + CRYPTO_new_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); +#if 0 + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) + { + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, ret, &ret->ex_data); + OPENSSL_free(ret); + ret=NULL; + } +#endif + return(ret); +} + +static void *ecdsa_data_new(void) +{ + return (void *)ECDSA_DATA_new_method(NULL); +} + +static void *ecdsa_data_dup(void *data) +{ + ECDSA_DATA *r = (ECDSA_DATA *)data; + + /* XXX: dummy operation */ + if (r == NULL) + return NULL; + + return ecdsa_data_new(); +} + +static void ecdsa_data_free(void *data) +{ + ECDSA_DATA *r = (ECDSA_DATA *)data; + +#ifndef OPENSSL_NO_ENGINE + if (r->engine) + ENGINE_finish(r->engine); +#endif + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDSA, r, &r->ex_data); + + OPENSSL_cleanse((void *)r, sizeof(ECDSA_DATA)); + + OPENSSL_free(r); +} + +ECDSA_DATA *ecdsa_check(EC_KEY *key) +{ + ECDSA_DATA *ecdsa_data; + + void *data = EC_KEY_get_key_method_data(key, ecdsa_data_dup, + ecdsa_data_free, ecdsa_data_free); + if (data == NULL) + { + ecdsa_data = (ECDSA_DATA *)ecdsa_data_new(); + if (ecdsa_data == NULL) + return NULL; + EC_KEY_insert_key_method_data(key, (void *)ecdsa_data, + ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free); + } + else + ecdsa_data = (ECDSA_DATA *)data; + + + return ecdsa_data; +} + +int ECDSA_size(const EC_KEY *r) +{ + int ret,i; + ASN1_INTEGER bs; + BIGNUM *order=NULL; + unsigned char buf[4]; + const EC_GROUP *group; + + if (r == NULL) + return 0; + group = EC_KEY_get0_group(r); + if (group == NULL) + return 0; + + if ((order = BN_new()) == NULL) return 0; + if (!EC_GROUP_get_order(group,order,NULL)) + { + BN_clear_free(order); + return 0; + } + i=BN_num_bits(order); + bs.length=(i+7)/8; + bs.data=buf; + bs.type=V_ASN1_INTEGER; + /* If the top bit is set the asn1 encoding is 1 larger. */ + buf[0]=0xff; + + i=i2d_ASN1_INTEGER(&bs,NULL); + i+=i; /* r and s */ + ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE); + BN_clear_free(order); + return(ret); +} + + +int ECDSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, + CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) +{ + return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_ECDSA, argl, argp, + new_func, dup_func, free_func); +} + +int ECDSA_set_ex_data(EC_KEY *d, int idx, void *arg) +{ + ECDSA_DATA *ecdsa; + ecdsa = ecdsa_check(d); + if (ecdsa == NULL) + return 0; + return(CRYPTO_set_ex_data(&ecdsa->ex_data,idx,arg)); +} + +void *ECDSA_get_ex_data(EC_KEY *d, int idx) +{ + ECDSA_DATA *ecdsa; + ecdsa = ecdsa_check(d); + if (ecdsa == NULL) + return NULL; + return(CRYPTO_get_ex_data(&ecdsa->ex_data,idx)); +} |