363 lines
7.6 KiB
C
363 lines
7.6 KiB
C
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/*
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* Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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/*
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* DSA low level APIs are deprecated for public use, but still ok for
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* internal use.
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*/
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#include "internal/deprecated.h"
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#include <openssl/bn.h>
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#ifndef FIPS_MODULE
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# include <openssl/engine.h>
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#endif
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#include "internal/cryptlib.h"
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#include "internal/refcount.h"
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#include "crypto/dsa.h"
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#include "crypto/dh.h" /* required by DSA_dup_DH() */
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#include "dsa_local.h"
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static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx);
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#ifndef FIPS_MODULE
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int DSA_set_ex_data(DSA *d, int idx, void *arg)
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{
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return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
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}
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void *DSA_get_ex_data(const DSA *d, int idx)
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{
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return CRYPTO_get_ex_data(&d->ex_data, idx);
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}
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# ifndef OPENSSL_NO_DH
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DH *DSA_dup_DH(const DSA *r)
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{
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/*
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* DSA has p, q, g, optional pub_key, optional priv_key.
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* DH has p, optional length, g, optional pub_key,
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* optional priv_key, optional q.
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*/
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DH *ret = NULL;
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BIGNUM *pub_key = NULL, *priv_key = NULL;
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if (r == NULL)
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goto err;
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ret = DH_new();
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if (ret == NULL)
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goto err;
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if (!ossl_ffc_params_copy(ossl_dh_get0_params(ret), &r->params))
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goto err;
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if (r->pub_key != NULL) {
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pub_key = BN_dup(r->pub_key);
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if (pub_key == NULL)
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goto err;
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if (r->priv_key != NULL) {
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priv_key = BN_dup(r->priv_key);
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if (priv_key == NULL)
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goto err;
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}
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if (!DH_set0_key(ret, pub_key, priv_key))
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goto err;
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} else if (r->priv_key != NULL) {
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/* Shouldn't happen */
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goto err;
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}
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return ret;
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err:
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BN_free(pub_key);
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BN_free(priv_key);
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DH_free(ret);
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return NULL;
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}
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# endif /* OPENSSL_NO_DH */
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void DSA_clear_flags(DSA *d, int flags)
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{
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d->flags &= ~flags;
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}
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int DSA_test_flags(const DSA *d, int flags)
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{
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return d->flags & flags;
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}
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void DSA_set_flags(DSA *d, int flags)
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{
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d->flags |= flags;
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}
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ENGINE *DSA_get0_engine(DSA *d)
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{
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return d->engine;
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}
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int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
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{
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/*
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* NB: The caller is specifically setting a method, so it's not up to us
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* to deal with which ENGINE it comes from.
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*/
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const DSA_METHOD *mtmp;
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mtmp = dsa->meth;
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if (mtmp->finish)
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mtmp->finish(dsa);
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#ifndef OPENSSL_NO_ENGINE
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ENGINE_finish(dsa->engine);
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dsa->engine = NULL;
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#endif
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dsa->meth = meth;
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if (meth->init)
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meth->init(dsa);
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return 1;
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}
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#endif /* FIPS_MODULE */
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const DSA_METHOD *DSA_get_method(DSA *d)
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{
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return d->meth;
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}
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static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx)
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{
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DSA *ret = OPENSSL_zalloc(sizeof(*ret));
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if (ret == NULL)
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return NULL;
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ret->lock = CRYPTO_THREAD_lock_new();
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if (ret->lock == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_CRYPTO_LIB);
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OPENSSL_free(ret);
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return NULL;
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}
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if (!CRYPTO_NEW_REF(&ret->references, 1)) {
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CRYPTO_THREAD_lock_free(ret->lock);
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OPENSSL_free(ret);
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return NULL;
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}
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ret->libctx = libctx;
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ret->meth = DSA_get_default_method();
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#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
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ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; /* early default init */
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if (engine) {
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if (!ENGINE_init(engine)) {
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ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB);
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goto err;
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}
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ret->engine = engine;
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} else
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ret->engine = ENGINE_get_default_DSA();
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if (ret->engine) {
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ret->meth = ENGINE_get_DSA(ret->engine);
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if (ret->meth == NULL) {
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ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB);
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goto err;
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}
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}
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#endif
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ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
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#ifndef FIPS_MODULE
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if (!ossl_crypto_new_ex_data_ex(libctx, CRYPTO_EX_INDEX_DSA, ret,
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&ret->ex_data))
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goto err;
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#endif
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ossl_ffc_params_init(&ret->params);
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if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
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ERR_raise(ERR_LIB_DSA, ERR_R_INIT_FAIL);
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goto err;
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}
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return ret;
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err:
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DSA_free(ret);
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return NULL;
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}
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DSA *DSA_new_method(ENGINE *engine)
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{
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return dsa_new_intern(engine, NULL);
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}
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DSA *ossl_dsa_new(OSSL_LIB_CTX *libctx)
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{
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return dsa_new_intern(NULL, libctx);
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}
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#ifndef FIPS_MODULE
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DSA *DSA_new(void)
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{
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return dsa_new_intern(NULL, NULL);
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}
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#endif
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void DSA_free(DSA *r)
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{
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int i;
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if (r == NULL)
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return;
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CRYPTO_DOWN_REF(&r->references, &i);
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REF_PRINT_COUNT("DSA", r);
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if (i > 0)
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return;
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REF_ASSERT_ISNT(i < 0);
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if (r->meth != NULL && r->meth->finish != NULL)
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r->meth->finish(r);
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#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
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ENGINE_finish(r->engine);
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#endif
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#ifndef FIPS_MODULE
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
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#endif
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CRYPTO_THREAD_lock_free(r->lock);
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CRYPTO_FREE_REF(&r->references);
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ossl_ffc_params_cleanup(&r->params);
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BN_clear_free(r->pub_key);
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BN_clear_free(r->priv_key);
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OPENSSL_free(r);
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}
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int DSA_up_ref(DSA *r)
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{
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int i;
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if (CRYPTO_UP_REF(&r->references, &i) <= 0)
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return 0;
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REF_PRINT_COUNT("DSA", r);
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REF_ASSERT_ISNT(i < 2);
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return ((i > 1) ? 1 : 0);
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}
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void ossl_dsa_set0_libctx(DSA *d, OSSL_LIB_CTX *libctx)
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{
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d->libctx = libctx;
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}
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void DSA_get0_pqg(const DSA *d,
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const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
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{
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ossl_ffc_params_get0_pqg(&d->params, p, q, g);
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}
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int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g)
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{
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/* If the fields p, q and g in d are NULL, the corresponding input
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* parameters MUST be non-NULL.
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*/
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if ((d->params.p == NULL && p == NULL)
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|| (d->params.q == NULL && q == NULL)
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|| (d->params.g == NULL && g == NULL))
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return 0;
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ossl_ffc_params_set0_pqg(&d->params, p, q, g);
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d->dirty_cnt++;
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return 1;
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}
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const BIGNUM *DSA_get0_p(const DSA *d)
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{
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return d->params.p;
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}
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const BIGNUM *DSA_get0_q(const DSA *d)
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{
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return d->params.q;
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}
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const BIGNUM *DSA_get0_g(const DSA *d)
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{
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return d->params.g;
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}
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const BIGNUM *DSA_get0_pub_key(const DSA *d)
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{
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return d->pub_key;
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}
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const BIGNUM *DSA_get0_priv_key(const DSA *d)
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{
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return d->priv_key;
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}
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void DSA_get0_key(const DSA *d,
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const BIGNUM **pub_key, const BIGNUM **priv_key)
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{
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if (pub_key != NULL)
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*pub_key = d->pub_key;
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if (priv_key != NULL)
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*priv_key = d->priv_key;
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}
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int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key)
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{
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if (pub_key != NULL) {
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BN_free(d->pub_key);
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d->pub_key = pub_key;
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}
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if (priv_key != NULL) {
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BN_free(d->priv_key);
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d->priv_key = priv_key;
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}
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d->dirty_cnt++;
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return 1;
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}
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int DSA_security_bits(const DSA *d)
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{
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if (d->params.p != NULL && d->params.q != NULL)
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return BN_security_bits(BN_num_bits(d->params.p),
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BN_num_bits(d->params.q));
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return -1;
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}
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int DSA_bits(const DSA *dsa)
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{
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if (dsa->params.p != NULL)
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return BN_num_bits(dsa->params.p);
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return -1;
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}
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FFC_PARAMS *ossl_dsa_get0_params(DSA *dsa)
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{
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return &dsa->params;
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}
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int ossl_dsa_ffc_params_fromdata(DSA *dsa, const OSSL_PARAM params[])
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{
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int ret;
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FFC_PARAMS *ffc = ossl_dsa_get0_params(dsa);
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ret = ossl_ffc_params_fromdata(ffc, params);
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if (ret)
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dsa->dirty_cnt++;
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return ret;
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}
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