/* 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> #ifdef OPENSSL_FIPS #include <openssl/fips.h> #endif 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) { #ifdef OPENSSL_FIPS if (FIPS_mode()) return FIPS_ecdsa_openssl(); else return ECDSA_OpenSSL(); #else default_ECDSA_method = ECDSA_OpenSSL(); #endif } return default_ECDSA_method; } int ECDSA_set_method(EC_KEY *eckey, const ECDSA_METHOD *meth) { ECDSA_DATA *ecdsa; ecdsa = ecdsa_check(eckey); if (ecdsa == NULL) return 0; #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; data = EC_KEY_insert_key_method_data(key, (void *)ecdsa_data, ecdsa_data_dup, ecdsa_data_free, ecdsa_data_free); if (data != NULL) { /* Another thread raced us to install the key_method * data and won. */ ecdsa_data_free(ecdsa_data); ecdsa_data = (ECDSA_DATA *)data; } } else ecdsa_data = (ECDSA_DATA *)data; #ifdef OPENSSL_FIPS if (FIPS_mode() && !(ecdsa_data->flags & ECDSA_FLAG_FIPS_METHOD) && !(EC_KEY_get_flags(key) & EC_FLAG_NON_FIPS_ALLOW)) { ECDSAerr(ECDSA_F_ECDSA_CHECK, ECDSA_R_NON_FIPS_METHOD); return NULL; } #endif 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)); }