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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* DSA low level APIs are deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <openssl/opensslconf.h>
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/evp.h>
#include <openssl/bn.h>
#include <openssl/rand.h>
#include <openssl/sha.h>
#include "crypto/dsa.h"
#include "dsa_local.h"
int ossl_dsa_generate_ffc_parameters(DSA *dsa, int type, int pbits, int qbits,
BN_GENCB *cb)
{
int ret = 0, res;
#ifndef FIPS_MODULE
if (type == DSA_PARAMGEN_TYPE_FIPS_186_2)
ret = ossl_ffc_params_FIPS186_2_generate(dsa->libctx, &dsa->params,
FFC_PARAM_TYPE_DSA,
pbits, qbits, &res, cb);
else
#endif
ret = ossl_ffc_params_FIPS186_4_generate(dsa->libctx, &dsa->params,
FFC_PARAM_TYPE_DSA,
pbits, qbits, &res, cb);
if (ret > 0)
dsa->dirty_cnt++;
return ret;
}
#ifndef FIPS_MODULE
int DSA_generate_parameters_ex(DSA *dsa, int bits,
const unsigned char *seed_in, int seed_len,
int *counter_ret, unsigned long *h_ret,
BN_GENCB *cb)
{
if (dsa->meth->dsa_paramgen)
return dsa->meth->dsa_paramgen(dsa, bits, seed_in, seed_len,
counter_ret, h_ret, cb);
if (seed_in != NULL
&& !ossl_ffc_params_set_validate_params(&dsa->params, seed_in, seed_len,
-1))
return 0;
/* The old code used FIPS 186-2 DSA Parameter generation */
if (bits < 2048 && seed_len <= 20) {
if (!ossl_dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_2,
bits, 160, cb))
return 0;
} else {
if (!ossl_dsa_generate_ffc_parameters(dsa, DSA_PARAMGEN_TYPE_FIPS_186_4,
bits, 0, cb))
return 0;
}
if (counter_ret != NULL)
*counter_ret = dsa->params.pcounter;
if (h_ret != NULL)
*h_ret = dsa->params.h;
return 1;
}
#endif
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