diff options
Diffstat (limited to 'openssl/crypto/dh/dh_lib.c')
| -rw-r--r-- | openssl/crypto/dh/dh_lib.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/openssl/crypto/dh/dh_lib.c b/openssl/crypto/dh/dh_lib.c new file mode 100644 index 0000000..bebc160 --- /dev/null +++ b/openssl/crypto/dh/dh_lib.c @@ -0,0 +1,263 @@ +/* crypto/dh/dh_lib.c */ +/* 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 <stdio.h> +#include "cryptlib.h" +#include <openssl/bn.h> +#include <openssl/dh.h> +#ifndef OPENSSL_NO_ENGINE +# include <openssl/engine.h> +#endif + +#ifdef OPENSSL_FIPS +# include <openssl/fips.h> +#endif + +const char DH_version[] = "Diffie-Hellman" OPENSSL_VERSION_PTEXT; + +static const DH_METHOD *default_DH_method = NULL; + +void DH_set_default_method(const DH_METHOD *meth) +{ + default_DH_method = meth; +} + +const DH_METHOD *DH_get_default_method(void) +{ + if (!default_DH_method) { +#ifdef OPENSSL_FIPS + if (FIPS_mode()) + return FIPS_dh_openssl(); + else + return DH_OpenSSL(); +#else + default_DH_method = DH_OpenSSL(); +#endif + } + return default_DH_method; +} + +int DH_set_method(DH *dh, const DH_METHOD *meth) +{ + /* + * NB: The caller is specifically setting a method, so it's not up to us + * to deal with which ENGINE it comes from. + */ + const DH_METHOD *mtmp; + mtmp = dh->meth; + if (mtmp->finish) + mtmp->finish(dh); +#ifndef OPENSSL_NO_ENGINE + if (dh->engine) { + ENGINE_finish(dh->engine); + dh->engine = NULL; + } +#endif + dh->meth = meth; + if (meth->init) + meth->init(dh); + return 1; +} + +DH *DH_new(void) +{ + return DH_new_method(NULL); +} + +DH *DH_new_method(ENGINE *engine) +{ + DH *ret; + + ret = (DH *)OPENSSL_malloc(sizeof(DH)); + if (ret == NULL) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_MALLOC_FAILURE); + return (NULL); + } + + ret->meth = DH_get_default_method(); +#ifndef OPENSSL_NO_ENGINE + if (engine) { + if (!ENGINE_init(engine)) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); + OPENSSL_free(ret); + return NULL; + } + ret->engine = engine; + } else + ret->engine = ENGINE_get_default_DH(); + if (ret->engine) { + ret->meth = ENGINE_get_DH(ret->engine); + if (!ret->meth) { + DHerr(DH_F_DH_NEW_METHOD, ERR_R_ENGINE_LIB); + ENGINE_finish(ret->engine); + OPENSSL_free(ret); + return NULL; + } + } +#endif + + ret->pad = 0; + ret->version = 0; + ret->p = NULL; + ret->g = NULL; + ret->length = 0; + ret->pub_key = NULL; + ret->priv_key = NULL; + ret->q = NULL; + ret->j = NULL; + ret->seed = NULL; + ret->seedlen = 0; + ret->counter = NULL; + ret->method_mont_p = NULL; + ret->references = 1; + ret->flags = ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW; + CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); + if ((ret->meth->init != NULL) && !ret->meth->init(ret)) { +#ifndef OPENSSL_NO_ENGINE + if (ret->engine) + ENGINE_finish(ret->engine); +#endif + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data); + OPENSSL_free(ret); + ret = NULL; + } + return (ret); +} + +void DH_free(DH *r) +{ + int i; + if (r == NULL) + return; + i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH); +#ifdef REF_PRINT + REF_PRINT("DH", r); +#endif + if (i > 0) + return; +#ifdef REF_CHECK + if (i < 0) { + fprintf(stderr, "DH_free, bad reference count\n"); + abort(); + } +#endif + + if (r->meth->finish) + r->meth->finish(r); +#ifndef OPENSSL_NO_ENGINE + if (r->engine) + ENGINE_finish(r->engine); +#endif + + CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data); + + if (r->p != NULL) + BN_clear_free(r->p); + if (r->g != NULL) + BN_clear_free(r->g); + if (r->q != NULL) + BN_clear_free(r->q); + if (r->j != NULL) + BN_clear_free(r->j); + if (r->seed) + OPENSSL_free(r->seed); + if (r->counter != NULL) + BN_clear_free(r->counter); + if (r->pub_key != NULL) + BN_clear_free(r->pub_key); + if (r->priv_key != NULL) + BN_clear_free(r->priv_key); + OPENSSL_free(r); +} + +int DH_up_ref(DH *r) +{ + int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH); +#ifdef REF_PRINT + REF_PRINT("DH", r); +#endif +#ifdef REF_CHECK + if (i < 2) { + fprintf(stderr, "DH_up, bad reference count\n"); + abort(); + } +#endif + return ((i > 1) ? 1 : 0); +} + +int DH_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_DH, argl, argp, + new_func, dup_func, free_func); +} + +int DH_set_ex_data(DH *d, int idx, void *arg) +{ + return (CRYPTO_set_ex_data(&d->ex_data, idx, arg)); +} + +void *DH_get_ex_data(DH *d, int idx) +{ + return (CRYPTO_get_ex_data(&d->ex_data, idx)); +} + +int DH_size(const DH *dh) +{ + return (BN_num_bytes(dh->p)); +} |