You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
316 lines
7.9 KiB
316 lines
7.9 KiB
14 years ago
|
/* 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/bn.h>
|
||
|
|
#include "evp_locl.h"
|
||
|
|
#include "dsa_locl.h"
|
||
|
|
|
||
|
|
/* DSA pkey context structure */
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
/* Parameter gen parameters */
|
||
|
|
int nbits; /* size of p in bits (default: 1024) */
|
||
|
|
int qbits; /* size of q in bits (default: 160) */
|
||
|
|
const EVP_MD *pmd; /* MD for parameter generation */
|
||
|
|
/* Keygen callback info */
|
||
|
|
int gentmp[2];
|
||
|
|
/* message digest */
|
||
|
|
const EVP_MD *md; /* MD for the signature */
|
||
|
|
} DSA_PKEY_CTX;
|
||
|
|
|
||
|
|
static int pkey_dsa_init(EVP_PKEY_CTX *ctx)
|
||
|
|
{
|
||
|
|
DSA_PKEY_CTX *dctx;
|
||
|
|
dctx = OPENSSL_malloc(sizeof(DSA_PKEY_CTX));
|
||
|
|
if (!dctx)
|
||
|
|
return 0;
|
||
|
|
dctx->nbits = 1024;
|
||
|
|
dctx->qbits = 160;
|
||
|
|
dctx->pmd = NULL;
|
||
|
|
dctx->md = NULL;
|
||
|
|
|
||
|
|
ctx->data = dctx;
|
||
|
|
ctx->keygen_info = dctx->gentmp;
|
||
|
|
ctx->keygen_info_count = 2;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
|
||
|
|
{
|
||
|
|
DSA_PKEY_CTX *dctx, *sctx;
|
||
|
|
if (!pkey_dsa_init(dst))
|
||
|
|
return 0;
|
||
|
|
sctx = src->data;
|
||
|
|
dctx = dst->data;
|
||
|
|
dctx->nbits = sctx->nbits;
|
||
|
|
dctx->qbits = sctx->qbits;
|
||
|
|
dctx->pmd = sctx->pmd;
|
||
|
|
dctx->md = sctx->md;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)
|
||
|
|
{
|
||
|
|
DSA_PKEY_CTX *dctx = ctx->data;
|
||
|
|
if (dctx)
|
||
|
|
OPENSSL_free(dctx);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
|
||
|
|
const unsigned char *tbs, size_t tbslen)
|
||
|
|
{
|
||
|
|
int ret, type;
|
||
|
|
unsigned int sltmp;
|
||
|
|
DSA_PKEY_CTX *dctx = ctx->data;
|
||
|
|
DSA *dsa = ctx->pkey->pkey.dsa;
|
||
|
|
|
||
|
|
if (dctx->md)
|
||
|
|
type = EVP_MD_type(dctx->md);
|
||
|
|
else
|
||
|
|
type = NID_sha1;
|
||
|
|
|
||
|
|
ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);
|
||
|
|
|
||
|
|
if (ret <= 0)
|
||
|
|
return ret;
|
||
|
|
*siglen = sltmp;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_verify(EVP_PKEY_CTX *ctx,
|
||
|
|
const unsigned char *sig, size_t siglen,
|
||
|
|
const unsigned char *tbs, size_t tbslen)
|
||
|
|
{
|
||
|
|
int ret, type;
|
||
|
|
DSA_PKEY_CTX *dctx = ctx->data;
|
||
|
|
DSA *dsa = ctx->pkey->pkey.dsa;
|
||
|
|
|
||
|
|
if (dctx->md)
|
||
|
|
type = EVP_MD_type(dctx->md);
|
||
|
|
else
|
||
|
|
type = NID_sha1;
|
||
|
|
|
||
|
|
ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
|
||
|
|
{
|
||
|
|
DSA_PKEY_CTX *dctx = ctx->data;
|
||
|
|
switch (type)
|
||
|
|
{
|
||
|
|
case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
|
||
|
|
if (p1 < 256)
|
||
|
|
return -2;
|
||
|
|
dctx->nbits = p1;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
|
||
|
|
if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
|
||
|
|
return -2;
|
||
|
|
dctx->qbits = p1;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
|
||
|
|
if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
|
||
|
|
EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
|
||
|
|
EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
|
||
|
|
{
|
||
|
|
DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
dctx->md = p2;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_PKEY_CTRL_MD:
|
||
|
|
if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
|
||
|
|
EVP_MD_type((const EVP_MD *)p2) != NID_dsa &&
|
||
|
|
EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
|
||
|
|
EVP_MD_type((const EVP_MD *)p2) != NID_sha256)
|
||
|
|
{
|
||
|
|
DSAerr(DSA_F_PKEY_DSA_CTRL, DSA_R_INVALID_DIGEST_TYPE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
dctx->md = p2;
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_PKEY_CTRL_DIGESTINIT:
|
||
|
|
case EVP_PKEY_CTRL_PKCS7_SIGN:
|
||
|
|
case EVP_PKEY_CTRL_CMS_SIGN:
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
case EVP_PKEY_CTRL_PEER_KEY:
|
||
|
|
DSAerr(DSA_F_PKEY_DSA_CTRL,
|
||
|
|
EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);
|
||
|
|
return -2;
|
||
|
|
default:
|
||
|
|
return -2;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx,
|
||
|
|
const char *type, const char *value)
|
||
|
|
{
|
||
|
|
if (!strcmp(type, "dsa_paramgen_bits"))
|
||
|
|
{
|
||
|
|
int nbits;
|
||
|
|
nbits = atoi(value);
|
||
|
|
return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
|
||
|
|
}
|
||
|
|
if (!strcmp(type, "dsa_paramgen_q_bits"))
|
||
|
|
{
|
||
|
|
int qbits = atoi(value);
|
||
|
|
return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
|
||
|
|
EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS, qbits, NULL);
|
||
|
|
}
|
||
|
|
if (!strcmp(type, "dsa_paramgen_md"))
|
||
|
|
{
|
||
|
|
return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA, EVP_PKEY_OP_PARAMGEN,
|
||
|
|
EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
|
||
|
|
(void *)EVP_get_digestbyname(value));
|
||
|
|
}
|
||
|
|
return -2;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
||
|
|
{
|
||
|
|
DSA *dsa = NULL;
|
||
|
|
DSA_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;
|
||
|
|
dsa = DSA_new();
|
||
|
|
if (!dsa)
|
||
|
|
return 0;
|
||
|
|
ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,
|
||
|
|
NULL, 0, NULL, NULL, pcb);
|
||
|
|
if (ret)
|
||
|
|
EVP_PKEY_assign_DSA(pkey, dsa);
|
||
|
|
else
|
||
|
|
DSA_free(dsa);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
|
||
|
|
{
|
||
|
|
DSA *dsa = NULL;
|
||
|
|
if (ctx->pkey == NULL)
|
||
|
|
{
|
||
|
|
DSAerr(DSA_F_PKEY_DSA_KEYGEN, DSA_R_NO_PARAMETERS_SET);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
dsa = DSA_new();
|
||
|
|
if (!dsa)
|
||
|
|
return 0;
|
||
|
|
EVP_PKEY_assign_DSA(pkey, dsa);
|
||
|
|
/* Note: if error return, pkey is freed by parent routine */
|
||
|
|
if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
|
||
|
|
return 0;
|
||
|
|
return DSA_generate_key(pkey->pkey.dsa);
|
||
|
|
}
|
||
|
|
|
||
|
|
const EVP_PKEY_METHOD dsa_pkey_meth =
|
||
|
|
{
|
||
|
|
EVP_PKEY_DSA,
|
||
|
|
EVP_PKEY_FLAG_AUTOARGLEN,
|
||
|
|
pkey_dsa_init,
|
||
|
|
pkey_dsa_copy,
|
||
|
|
pkey_dsa_cleanup,
|
||
|
|
|
||
|
|
0,
|
||
|
|
pkey_dsa_paramgen,
|
||
|
|
|
||
|
|
0,
|
||
|
|
pkey_dsa_keygen,
|
||
|
|
|
||
|
|
0,
|
||
|
|
pkey_dsa_sign,
|
||
|
|
|
||
|
|
0,
|
||
|
|
pkey_dsa_verify,
|
||
|
|
|
||
|
|
0,0,
|
||
|
|
|
||
|
|
0,0,0,0,
|
||
|
|
|
||
|
|
0,0,
|
||
|
|
|
||
|
|
0,0,
|
||
|
|
|
||
|
|
0,0,
|
||
|
|
|
||
|
|
pkey_dsa_ctrl,
|
||
|
|
pkey_dsa_ctrl_str
|
||
|
|
|
||
|
|
|
||
|
|
};
|