238 lines
6.9 KiB
C
238 lines
6.9 KiB
C
/* 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>
|
|
#include <openssl/engine.h>
|
|
|
|
const char *DH_version="Diffie-Hellman" OPENSSL_VERSION_PTEXT;
|
|
|
|
static const DH_METHOD *default_DH_method;
|
|
static int dh_meth_num = 0;
|
|
static STACK_OF(CRYPTO_EX_DATA_FUNCS) *dh_meth = NULL;
|
|
|
|
void DH_set_default_openssl_method(const DH_METHOD *meth)
|
|
{
|
|
ENGINE *e;
|
|
/* We'll need to notify the "openssl" ENGINE of this
|
|
* change too. We won't bother locking things down at
|
|
* our end as there was never any locking in these
|
|
* functions! */
|
|
if(default_DH_method != meth)
|
|
{
|
|
default_DH_method = meth;
|
|
e = ENGINE_by_id("openssl");
|
|
if(e)
|
|
{
|
|
ENGINE_set_DH(e, meth);
|
|
ENGINE_free(e);
|
|
}
|
|
}
|
|
}
|
|
|
|
const DH_METHOD *DH_get_default_openssl_method(void)
|
|
{
|
|
if(!default_DH_method) default_DH_method = DH_OpenSSL();
|
|
return default_DH_method;
|
|
}
|
|
|
|
#if 0
|
|
DH_METHOD *DH_set_method(DH *dh, DH_METHOD *meth)
|
|
{
|
|
DH_METHOD *mtmp;
|
|
mtmp = dh->meth;
|
|
if (mtmp->finish) mtmp->finish(dh);
|
|
dh->meth = meth;
|
|
if (meth->init) meth->init(dh);
|
|
return mtmp;
|
|
}
|
|
#else
|
|
int DH_set_method(DH *dh, ENGINE *engine)
|
|
{
|
|
ENGINE *mtmp;
|
|
const DH_METHOD *meth;
|
|
mtmp = dh->engine;
|
|
meth = ENGINE_get_DH(mtmp);
|
|
if (!ENGINE_init(engine))
|
|
return 0;
|
|
if (meth->finish) meth->finish(dh);
|
|
dh->engine= engine;
|
|
meth = ENGINE_get_DH(engine);
|
|
if (meth->init) meth->init(dh);
|
|
/* SHOULD ERROR CHECK THIS!!! */
|
|
ENGINE_finish(mtmp);
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
DH *DH_new(void)
|
|
{
|
|
return DH_new_method(NULL);
|
|
}
|
|
|
|
#if 0
|
|
DH *DH_new_method(DH_METHOD *meth)
|
|
#else
|
|
DH *DH_new_method(ENGINE *engine)
|
|
#endif
|
|
{
|
|
const DH_METHOD *meth;
|
|
DH *ret;
|
|
ret=(DH *)OPENSSL_malloc(sizeof(DH));
|
|
|
|
if (ret == NULL)
|
|
{
|
|
DHerr(DH_F_DH_NEW,ERR_R_MALLOC_FAILURE);
|
|
return(NULL);
|
|
}
|
|
if(engine)
|
|
ret->engine = engine;
|
|
else
|
|
{
|
|
if((ret->engine=ENGINE_get_default_DH()) == NULL)
|
|
{
|
|
DHerr(DH_F_DH_NEW,ERR_LIB_ENGINE);
|
|
OPENSSL_free(ret);
|
|
return NULL;
|
|
}
|
|
}
|
|
meth = ENGINE_get_DH(ret->engine);
|
|
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=meth->flags;
|
|
CRYPTO_new_ex_data(dh_meth,ret,&ret->ex_data);
|
|
if ((meth->init != NULL) && !meth->init(ret))
|
|
{
|
|
CRYPTO_free_ex_data(dh_meth,ret,&ret->ex_data);
|
|
OPENSSL_free(ret);
|
|
ret=NULL;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
void DH_free(DH *r)
|
|
{
|
|
const DH_METHOD *meth;
|
|
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
|
|
|
|
meth = ENGINE_get_DH(r->engine);
|
|
if(meth->finish) meth->finish(r);
|
|
ENGINE_finish(r->engine);
|
|
|
|
CRYPTO_free_ex_data(dh_meth, 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_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
|
|
CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
|
|
{
|
|
dh_meth_num++;
|
|
return(CRYPTO_get_ex_new_index(dh_meth_num-1,
|
|
&dh_meth,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));
|
|
}
|