diff options
Diffstat (limited to 'crypto/ecdh/ech_lib.c')
| -rw-r--r-- | crypto/ecdh/ech_lib.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/crypto/ecdh/ech_lib.c b/crypto/ecdh/ech_lib.c new file mode 100644 index 000000000000..e89b1d477287 --- /dev/null +++ b/crypto/ecdh/ech_lib.c @@ -0,0 +1,247 @@ +/* crypto/ecdh/ech_lib.c */ +/* ==================================================================== + * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. + * + * The Elliptic Curve Public-Key Crypto Library (ECC Code) included + * herein is developed by SUN MICROSYSTEMS, INC., and is contributed + * to the OpenSSL project. + * + * The ECC Code is licensed pursuant to the OpenSSL open source + * license provided below. + * + * The ECDH software is originally written by Douglas Stebila of + * Sun Microsystems Laboratories. + * + */ +/* ==================================================================== + * Copyright (c) 1998-2003 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 "ech_locl.h" +#include <string.h> +#ifndef OPENSSL_NO_ENGINE +#include <openssl/engine.h> +#endif +#include <openssl/err.h> + +const char ECDH_version[]="ECDH" OPENSSL_VERSION_PTEXT; + +static const ECDH_METHOD *default_ECDH_method = NULL; + +static void *ecdh_data_new(void); +static void *ecdh_data_dup(void *); +static void ecdh_data_free(void *); + +void ECDH_set_default_method(const ECDH_METHOD *meth) + { + default_ECDH_method = meth; + } + +const ECDH_METHOD *ECDH_get_default_method(void) + { + if(!default_ECDH_method) + default_ECDH_method = ECDH_OpenSSL(); + return default_ECDH_method; + } + +int ECDH_set_method(EC_KEY *eckey, const ECDH_METHOD *meth) + { + const ECDH_METHOD *mtmp; + ECDH_DATA *ecdh; + + ecdh = ecdh_check(eckey); + + if (ecdh == NULL) + return 0; + + mtmp = ecdh->meth; +#if 0 + if (mtmp->finish) + mtmp->finish(eckey); +#endif +#ifndef OPENSSL_NO_ENGINE + if (ecdh->engine) + { + ENGINE_finish(ecdh->engine); + ecdh->engine = NULL; + } +#endif + ecdh->meth = meth; +#if 0 + if (meth->init) + meth->init(eckey); +#endif + return 1; + } + +static ECDH_DATA *ECDH_DATA_new_method(ENGINE *engine) + { + ECDH_DATA *ret; + + ret=(ECDH_DATA *)OPENSSL_malloc(sizeof(ECDH_DATA)); + if (ret == NULL) + { + ECDHerr(ECDH_F_ECDH_DATA_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return(NULL); + } + + ret->init = NULL; + + ret->meth = ECDH_get_default_method(); + ret->engine = engine; +#ifndef OPENSSL_NO_ENGINE + if (!ret->engine) + ret->engine = ENGINE_get_default_ECDH(); + if (ret->engine) + { + ret->meth = ENGINE_get_ECDH(ret->engine); + if (!ret->meth) + { + ECDHerr(ECDH_F_ECDH_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_ECDH, ret, &ret->ex_data); +#if 0 + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) + { + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, ret, &ret->ex_data); + OPENSSL_free(ret); + ret=NULL; + } +#endif + return(ret); + } + +static void *ecdh_data_new(void) + { + return (void *)ECDH_DATA_new_method(NULL); + } + +static void *ecdh_data_dup(void *data) +{ + ECDH_DATA *r = (ECDH_DATA *)data; + + /* XXX: dummy operation */ + if (r == NULL) + return NULL; + + return (void *)ecdh_data_new(); +} + +void ecdh_data_free(void *data) + { + ECDH_DATA *r = (ECDH_DATA *)data; + +#ifndef OPENSSL_NO_ENGINE + if (r->engine) + ENGINE_finish(r->engine); +#endif + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_ECDH, r, &r->ex_data); + + OPENSSL_cleanse((void *)r, sizeof(ECDH_DATA)); + + OPENSSL_free(r); + } + +ECDH_DATA *ecdh_check(EC_KEY *key) + { + ECDH_DATA *ecdh_data; + + void *data = EC_KEY_get_key_method_data(key, ecdh_data_dup, + ecdh_data_free, ecdh_data_free); + if (data == NULL) + { + ecdh_data = (ECDH_DATA *)ecdh_data_new(); + if (ecdh_data == NULL) + return NULL; + EC_KEY_insert_key_method_data(key, (void *)ecdh_data, + ecdh_data_dup, ecdh_data_free, ecdh_data_free); + } + else + ecdh_data = (ECDH_DATA *)data; + + + return ecdh_data; + } + +int ECDH_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_ECDH, argl, argp, + new_func, dup_func, free_func); + } + +int ECDH_set_ex_data(EC_KEY *d, int idx, void *arg) + { + ECDH_DATA *ecdh; + ecdh = ecdh_check(d); + if (ecdh == NULL) + return 0; + return(CRYPTO_set_ex_data(&ecdh->ex_data,idx,arg)); + } + +void *ECDH_get_ex_data(EC_KEY *d, int idx) + { + ECDH_DATA *ecdh; + ecdh = ecdh_check(d); + if (ecdh == NULL) + return NULL; + return(CRYPTO_get_ex_data(&ecdh->ex_data,idx)); + } |