mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-20 23:17:29 +00:00
255 lines
6.0 KiB
C
255 lines
6.0 KiB
C
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
|
|
* project 2006.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 2006 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
|
|
* licensing@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 <stdio.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/asn1t.h>
|
|
#include <openssl/x509.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/dh.h>
|
|
#include <openssl/bn.h>
|
|
#include "evp_locl.h"
|
|
|
|
/* DH pkey context structure */
|
|
|
|
typedef struct
|
|
{
|
|
/* Parameter gen parameters */
|
|
int prime_len;
|
|
int generator;
|
|
int use_dsa;
|
|
/* Keygen callback info */
|
|
int gentmp[2];
|
|
/* message digest */
|
|
} DH_PKEY_CTX;
|
|
|
|
static int pkey_dh_init(EVP_PKEY_CTX *ctx)
|
|
{
|
|
DH_PKEY_CTX *dctx;
|
|
dctx = OPENSSL_malloc(sizeof(DH_PKEY_CTX));
|
|
if (!dctx)
|
|
return 0;
|
|
dctx->prime_len = 1024;
|
|
dctx->generator = 2;
|
|
dctx->use_dsa = 0;
|
|
|
|
ctx->data = dctx;
|
|
ctx->keygen_info = dctx->gentmp;
|
|
ctx->keygen_info_count = 2;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
|
|
{
|
|
DH_PKEY_CTX *dctx, *sctx;
|
|
if (!pkey_dh_init(dst))
|
|
return 0;
|
|
sctx = src->data;
|
|
dctx = dst->data;
|
|
dctx->prime_len = sctx->prime_len;
|
|
dctx->generator = sctx->generator;
|
|
dctx->use_dsa = sctx->use_dsa;
|
|
return 1;
|
|
}
|
|
|
|
static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx)
|
|
{
|
|
DH_PKEY_CTX *dctx = ctx->data;
|
|
if (dctx)
|
|
OPENSSL_free(dctx);
|
|
}
|
|
|
|
static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
|
|
{
|
|
DH_PKEY_CTX *dctx = ctx->data;
|
|
switch (type)
|
|
{
|
|
case EVP_PKEY_CTRL_DH_PARAMGEN_PRIME_LEN:
|
|
if (p1 < 256)
|
|
return -2;
|
|
dctx->prime_len = p1;
|
|
return 1;
|
|
|
|
case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR:
|
|
dctx->generator = p1;
|
|
return 1;
|
|
|
|
case EVP_PKEY_CTRL_PEER_KEY:
|
|
/* Default behaviour is OK */
|
|
return 1;
|
|
|
|
default:
|
|
return -2;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx,
|
|
const char *type, const char *value)
|
|
{
|
|
if (!strcmp(type, "dh_paramgen_prime_len"))
|
|
{
|
|
int len;
|
|
len = atoi(value);
|
|
return EVP_PKEY_CTX_set_dh_paramgen_prime_len(ctx, len);
|
|
}
|
|
if (!strcmp(type, "dh_paramgen_generator"))
|
|
{
|
|
int len;
|
|
len = atoi(value);
|
|
return EVP_PKEY_CTX_set_dh_paramgen_generator(ctx, len);
|
|
}
|
|
return -2;
|
|
}
|
|
|
|
static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
|
{
|
|
DH *dh = NULL;
|
|
DH_PKEY_CTX *dctx = ctx->data;
|
|
BN_GENCB *pcb, cb;
|
|
int ret;
|
|
if (ctx->pkey_gencb)
|
|
{
|
|
pcb = &cb;
|
|
evp_pkey_set_cb_translate(pcb, ctx);
|
|
}
|
|
else
|
|
pcb = NULL;
|
|
dh = DH_new();
|
|
if (!dh)
|
|
return 0;
|
|
ret = DH_generate_parameters_ex(dh,
|
|
dctx->prime_len, dctx->generator, pcb);
|
|
if (ret)
|
|
EVP_PKEY_assign_DH(pkey, dh);
|
|
else
|
|
DH_free(dh);
|
|
return ret;
|
|
}
|
|
|
|
static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
|
{
|
|
DH *dh = NULL;
|
|
if (ctx->pkey == NULL)
|
|
{
|
|
DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET);
|
|
return 0;
|
|
}
|
|
dh = DH_new();
|
|
if (!dh)
|
|
return 0;
|
|
EVP_PKEY_assign_DH(pkey, dh);
|
|
/* Note: if error return, pkey is freed by parent routine */
|
|
if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
|
|
return 0;
|
|
return DH_generate_key(pkey->pkey.dh);
|
|
}
|
|
|
|
static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, size_t *keylen)
|
|
{
|
|
int ret;
|
|
if (!ctx->pkey || !ctx->peerkey)
|
|
{
|
|
DHerr(DH_F_PKEY_DH_DERIVE, DH_R_KEYS_NOT_SET);
|
|
return 0;
|
|
}
|
|
ret = DH_compute_key(key, ctx->peerkey->pkey.dh->pub_key,
|
|
ctx->pkey->pkey.dh);
|
|
if (ret < 0)
|
|
return ret;
|
|
*keylen = ret;
|
|
return 1;
|
|
}
|
|
|
|
const EVP_PKEY_METHOD dh_pkey_meth =
|
|
{
|
|
EVP_PKEY_DH,
|
|
EVP_PKEY_FLAG_AUTOARGLEN,
|
|
pkey_dh_init,
|
|
pkey_dh_copy,
|
|
pkey_dh_cleanup,
|
|
|
|
0,
|
|
pkey_dh_paramgen,
|
|
|
|
0,
|
|
pkey_dh_keygen,
|
|
|
|
0,
|
|
0,
|
|
|
|
0,
|
|
0,
|
|
|
|
0,0,
|
|
|
|
0,0,0,0,
|
|
|
|
0,0,
|
|
|
|
0,0,
|
|
|
|
0,
|
|
pkey_dh_derive,
|
|
|
|
pkey_dh_ctrl,
|
|
pkey_dh_ctrl_str
|
|
|
|
};
|