mirror of
https://github.com/QuasarApp/openssl.git
synced 2025-04-29 19:24:37 +00:00
f11f86f6ec
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/10909)
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
|
|
* Copyright 1995-2016 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
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#include "internal/cryptlib.h"
|
|
#include <openssl/bn.h>
|
|
#include "crypto/dsa.h"
|
|
#include "dsa_local.h"
|
|
|
|
static int dsa_builtin_keygen(OPENSSL_CTX *libctx, DSA *dsa);
|
|
|
|
int DSA_generate_key(DSA *dsa)
|
|
{
|
|
if (dsa->meth->dsa_keygen != NULL)
|
|
return dsa->meth->dsa_keygen(dsa);
|
|
return dsa_builtin_keygen(NULL, dsa);
|
|
}
|
|
|
|
int dsa_generate_key_ctx(OPENSSL_CTX *libctx, DSA *dsa)
|
|
{
|
|
#ifndef FIPS_MODE
|
|
if (dsa->meth->dsa_keygen != NULL)
|
|
return dsa->meth->dsa_keygen(dsa);
|
|
#endif
|
|
return dsa_builtin_keygen(libctx, dsa);
|
|
}
|
|
|
|
static int dsa_builtin_keygen(OPENSSL_CTX *libctx, DSA *dsa)
|
|
{
|
|
int ok = 0;
|
|
BN_CTX *ctx = NULL;
|
|
BIGNUM *pub_key = NULL, *priv_key = NULL;
|
|
|
|
if ((ctx = BN_CTX_new_ex(libctx)) == NULL)
|
|
goto err;
|
|
|
|
if (dsa->priv_key == NULL) {
|
|
if ((priv_key = BN_secure_new()) == NULL)
|
|
goto err;
|
|
} else {
|
|
priv_key = dsa->priv_key;
|
|
}
|
|
|
|
if (!ffc_generate_private_key(ctx, &dsa->params, BN_num_bits(dsa->params.q),
|
|
112, priv_key))
|
|
goto err;
|
|
|
|
if (dsa->pub_key == NULL) {
|
|
if ((pub_key = BN_new()) == NULL)
|
|
goto err;
|
|
} else {
|
|
pub_key = dsa->pub_key;
|
|
}
|
|
|
|
{
|
|
BIGNUM *prk = BN_new();
|
|
|
|
if (prk == NULL)
|
|
goto err;
|
|
BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
|
|
|
|
/* pub_key = g ^ priv_key mod p */
|
|
if (!BN_mod_exp(pub_key, dsa->params.g, prk, dsa->params.p, ctx)) {
|
|
BN_free(prk);
|
|
goto err;
|
|
}
|
|
/* We MUST free prk before any further use of priv_key */
|
|
BN_free(prk);
|
|
}
|
|
|
|
dsa->priv_key = priv_key;
|
|
dsa->pub_key = pub_key;
|
|
dsa->dirty_cnt++;
|
|
ok = 1;
|
|
|
|
err:
|
|
if (pub_key != dsa->pub_key)
|
|
BN_free(pub_key);
|
|
if (priv_key != dsa->priv_key)
|
|
BN_free(priv_key);
|
|
BN_CTX_free(ctx);
|
|
return ok;
|
|
}
|