-/* crypto/dsa/dsa_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
*
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * 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
*/
-/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
+/*
+ * DSA low level APIs are deprecated for public use, but still ok for
+ * internal use.
+ */
+#include "internal/deprecated.h"
-#include <stdio.h>
-#include "cryptlib.h"
#include <openssl/bn.h>
-#include <openssl/dsa.h>
-#include <openssl/asn1.h>
+#ifndef FIPS_MODULE
+# include <openssl/engine.h>
+#endif
+#include "internal/cryptlib.h"
+#include "internal/refcount.h"
+#include "crypto/dsa.h"
+#include "crypto/dh.h" /* required by DSA_dup_DH() */
+#include "dsa_local.h"
-const char *DSA_version="DSA" OPENSSL_VERSION_PTEXT;
+static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx);
-static DSA_METHOD *default_DSA_method;
-static int dsa_meth_num = 0;
-static STACK *dsa_meth = NULL;
+#ifndef FIPS_MODULE
-void DSA_set_default_method(DSA_METHOD *meth)
+int DSA_set_ex_data(DSA *d, int idx, void *arg)
{
- default_DSA_method = meth;
+ return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
}
-DSA_METHOD *DSA_get_default_method(void)
+void *DSA_get_ex_data(const DSA *d, int idx)
{
- if(!default_DSA_method) default_DSA_method = DSA_OpenSSL();
- return default_DSA_method;
+ return CRYPTO_get_ex_data(&d->ex_data, idx);
}
-DSA *DSA_new(void)
+# ifndef OPENSSL_NO_DH
+DH *DSA_dup_DH(const DSA *r)
{
- return DSA_new_method(NULL);
-}
-
-DSA_METHOD *DSA_set_method(DSA *dsa, DSA_METHOD *meth)
-{
- DSA_METHOD *mtmp;
- mtmp = dsa->meth;
- if (mtmp->finish) mtmp->finish(dsa);
- dsa->meth = meth;
- if (meth->init) meth->init(dsa);
- return mtmp;
-}
-
-
-DSA *DSA_new_method(DSA_METHOD *meth)
- {
- DSA *ret;
-
- ret=(DSA *)Malloc(sizeof(DSA));
- if (ret == NULL)
- {
- DSAerr(DSA_F_DSA_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- if(!default_DSA_method) default_DSA_method = DSA_OpenSSL();
- if(meth) ret->meth = meth;
- else ret->meth = default_DSA_method;
- ret->pad=0;
- ret->version=0;
- ret->write_params=1;
- ret->p=NULL;
- ret->q=NULL;
- ret->g=NULL;
-
- ret->pub_key=NULL;
- ret->priv_key=NULL;
-
- ret->kinv=NULL;
- ret->r=NULL;
- ret->method_mont_p=NULL;
-
- ret->references=1;
- ret->flags=ret->meth->flags;
- if ((ret->meth->init != NULL) && !ret->meth->init(ret))
- {
- Free(ret);
- ret=NULL;
- }
- else
- CRYPTO_new_ex_data(dsa_meth,(char *)ret,&ret->ex_data);
-
- return(ret);
- }
+ /*
+ * DSA has p, q, g, optional pub_key, optional priv_key.
+ * DH has p, optional length, g, optional pub_key,
+ * optional priv_key, optional q.
+ */
+ DH *ret = NULL;
+ BIGNUM *pub_key = NULL, *priv_key = NULL;
-void DSA_free(DSA *r)
- {
- int i;
+ if (r == NULL)
+ goto err;
+ ret = DH_new();
+ if (ret == NULL)
+ goto err;
- if (r == NULL) return;
+ if (!ossl_ffc_params_copy(ossl_dh_get0_params(ret), &r->params))
+ goto err;
- i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
-#ifdef REF_PRINT
- REF_PRINT("DSA",r);
-#endif
- if (i > 0) return;
-#ifdef REF_CHECK
- if (i < 0)
- {
- fprintf(stderr,"DSA_free, bad reference count\n");
- abort();
- }
+ if (r->pub_key != NULL) {
+ pub_key = BN_dup(r->pub_key);
+ if (pub_key == NULL)
+ goto err;
+ if (r->priv_key != NULL) {
+ priv_key = BN_dup(r->priv_key);
+ if (priv_key == NULL)
+ goto err;
+ }
+ if (!DH_set0_key(ret, pub_key, priv_key))
+ goto err;
+ } else if (r->priv_key != NULL) {
+ /* Shouldn't happen */
+ goto err;
+ }
+
+ return ret;
+
+ err:
+ BN_free(pub_key);
+ BN_free(priv_key);
+ DH_free(ret);
+ return NULL;
+}
+# endif /* OPENSSL_NO_DH */
+
+void DSA_clear_flags(DSA *d, int flags)
+{
+ d->flags &= ~flags;
+}
+
+int DSA_test_flags(const DSA *d, int flags)
+{
+ return d->flags & flags;
+}
+
+void DSA_set_flags(DSA *d, int flags)
+{
+ d->flags |= flags;
+}
+
+ENGINE *DSA_get0_engine(DSA *d)
+{
+ return d->engine;
+}
+
+int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
+{
+ /*
+ * NB: The caller is specifically setting a method, so it's not up to us
+ * to deal with which ENGINE it comes from.
+ */
+ const DSA_METHOD *mtmp;
+ mtmp = dsa->meth;
+ if (mtmp->finish)
+ mtmp->finish(dsa);
+#ifndef OPENSSL_NO_ENGINE
+ ENGINE_finish(dsa->engine);
+ dsa->engine = NULL;
#endif
+ dsa->meth = meth;
+ if (meth->init)
+ meth->init(dsa);
+ return 1;
+}
+#endif /* FIPS_MODULE */
+
+
+const DSA_METHOD *DSA_get_method(DSA *d)
+{
+ return d->meth;
+}
- CRYPTO_free_ex_data(dsa_meth, (char *)r, &r->ex_data);
-
- if(r->meth->finish) r->meth->finish(r);
-
- if (r->p != NULL) BN_clear_free(r->p);
- if (r->q != NULL) BN_clear_free(r->q);
- if (r->g != NULL) BN_clear_free(r->g);
- if (r->pub_key != NULL) BN_clear_free(r->pub_key);
- if (r->priv_key != NULL) BN_clear_free(r->priv_key);
- if (r->kinv != NULL) BN_clear_free(r->kinv);
- if (r->r != NULL) BN_clear_free(r->r);
- Free(r);
- }
-
-int DSA_size(DSA *r)
- {
- int ret,i;
- ASN1_INTEGER bs;
- unsigned char buf[4];
-
- i=BN_num_bits(r->q);
- bs.length=(i+7)/8;
- bs.data=buf;
- bs.type=V_ASN1_INTEGER;
- /* If the top bit is set the asn1 encoding is 1 larger. */
- buf[0]=0xff;
-
- i=i2d_ASN1_INTEGER(&bs,NULL);
- i+=i; /* r and s */
- ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
- return(ret);
- }
-
-int DSA_get_ex_new_index(long argl, char *argp, int (*new_func)(),
- int (*dup_func)(), void (*free_func)())
- {
- dsa_meth_num++;
- return(CRYPTO_get_ex_new_index(dsa_meth_num-1,
- &dsa_meth,argl,argp,new_func,dup_func,free_func));
+static DSA *dsa_new_intern(ENGINE *engine, OSSL_LIB_CTX *libctx)
+{
+ DSA *ret = OPENSSL_zalloc(sizeof(*ret));
+
+ if (ret == NULL)
+ return NULL;
+
+ ret->lock = CRYPTO_THREAD_lock_new();
+ if (ret->lock == NULL) {
+ ERR_raise(ERR_LIB_DSA, ERR_R_CRYPTO_LIB);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ if (!CRYPTO_NEW_REF(&ret->references, 1)) {
+ CRYPTO_THREAD_lock_free(ret->lock);
+ OPENSSL_free(ret);
+ return NULL;
+ }
+
+ ret->libctx = libctx;
+ ret->meth = DSA_get_default_method();
+#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
+ ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW; /* early default init */
+ if (engine) {
+ if (!ENGINE_init(engine)) {
+ ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB);
+ goto err;
+ }
+ ret->engine = engine;
+ } else
+ ret->engine = ENGINE_get_default_DSA();
+ if (ret->engine) {
+ ret->meth = ENGINE_get_DSA(ret->engine);
+ if (ret->meth == NULL) {
+ ERR_raise(ERR_LIB_DSA, ERR_R_ENGINE_LIB);
+ goto err;
}
+ }
+#endif
-int DSA_set_ex_data(DSA *d, int idx, char *arg)
- {
- return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
- }
-
-char *DSA_get_ex_data(DSA *d, int idx)
- {
- return(CRYPTO_get_ex_data(&d->ex_data,idx));
- }
-
-#ifndef NO_DH
-DH *DSA_dup_DH(DSA *r)
- {
- /* DSA has p, q, g, optional pub_key, optional priv_key.
- * DH has p, optional length, g, optional pub_key, optional priv_key.
- */
-
- DH *ret = NULL;
-
- if (r == NULL)
- goto err;
- ret = DH_new();
- if (ret == NULL)
- goto err;
- if (r->p != NULL)
- if ((ret->p = BN_dup(r->p)) == NULL)
- goto err;
- if (r->q != NULL)
- ret->length = BN_num_bits(r->q);
- if (r->g != NULL)
- if ((ret->g = BN_dup(r->g)) == NULL)
- goto err;
- if (r->pub_key != NULL)
- if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
- goto err;
- if (r->priv_key != NULL)
- if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
- goto err;
-
- return ret;
+ ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
+
+#ifndef FIPS_MODULE
+ if (!ossl_crypto_new_ex_data_ex(libctx, CRYPTO_EX_INDEX_DSA, ret,
+ &ret->ex_data))
+ goto err;
+#endif
+
+ ossl_ffc_params_init(&ret->params);
+
+ if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
+ ERR_raise(ERR_LIB_DSA, ERR_R_INIT_FAIL);
+ goto err;
+ }
+
+ return ret;
err:
- if (ret != NULL)
- DH_free(ret);
- return NULL;
- }
+ DSA_free(ret);
+ return NULL;
+}
+
+DSA *DSA_new_method(ENGINE *engine)
+{
+ return dsa_new_intern(engine, NULL);
+}
+
+DSA *ossl_dsa_new(OSSL_LIB_CTX *libctx)
+{
+ return dsa_new_intern(NULL, libctx);
+}
+
+#ifndef FIPS_MODULE
+DSA *DSA_new(void)
+{
+ return dsa_new_intern(NULL, NULL);
+}
#endif
+
+void DSA_free(DSA *r)
+{
+ int i;
+
+ if (r == NULL)
+ return;
+
+ CRYPTO_DOWN_REF(&r->references, &i);
+ REF_PRINT_COUNT("DSA", r);
+ if (i > 0)
+ return;
+ REF_ASSERT_ISNT(i < 0);
+
+ if (r->meth != NULL && r->meth->finish != NULL)
+ r->meth->finish(r);
+#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
+ ENGINE_finish(r->engine);
+#endif
+
+#ifndef FIPS_MODULE
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
+#endif
+
+ CRYPTO_THREAD_lock_free(r->lock);
+ CRYPTO_FREE_REF(&r->references);
+
+ ossl_ffc_params_cleanup(&r->params);
+ BN_clear_free(r->pub_key);
+ BN_clear_free(r->priv_key);
+ OPENSSL_free(r);
+}
+
+int DSA_up_ref(DSA *r)
+{
+ int i;
+
+ if (CRYPTO_UP_REF(&r->references, &i) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("DSA", r);
+ REF_ASSERT_ISNT(i < 2);
+ return ((i > 1) ? 1 : 0);
+}
+
+void ossl_dsa_set0_libctx(DSA *d, OSSL_LIB_CTX *libctx)
+{
+ d->libctx = libctx;
+}
+
+void DSA_get0_pqg(const DSA *d,
+ const BIGNUM **p, const BIGNUM **q, const BIGNUM **g)
+{
+ ossl_ffc_params_get0_pqg(&d->params, p, q, g);
+}
+
+int DSA_set0_pqg(DSA *d, BIGNUM *p, BIGNUM *q, BIGNUM *g)
+{
+ /* If the fields p, q and g in d are NULL, the corresponding input
+ * parameters MUST be non-NULL.
+ */
+ if ((d->params.p == NULL && p == NULL)
+ || (d->params.q == NULL && q == NULL)
+ || (d->params.g == NULL && g == NULL))
+ return 0;
+
+ ossl_ffc_params_set0_pqg(&d->params, p, q, g);
+ d->dirty_cnt++;
+
+ return 1;
+}
+
+const BIGNUM *DSA_get0_p(const DSA *d)
+{
+ return d->params.p;
+}
+
+const BIGNUM *DSA_get0_q(const DSA *d)
+{
+ return d->params.q;
+}
+
+const BIGNUM *DSA_get0_g(const DSA *d)
+{
+ return d->params.g;
+}
+
+const BIGNUM *DSA_get0_pub_key(const DSA *d)
+{
+ return d->pub_key;
+}
+
+const BIGNUM *DSA_get0_priv_key(const DSA *d)
+{
+ return d->priv_key;
+}
+
+void DSA_get0_key(const DSA *d,
+ const BIGNUM **pub_key, const BIGNUM **priv_key)
+{
+ if (pub_key != NULL)
+ *pub_key = d->pub_key;
+ if (priv_key != NULL)
+ *priv_key = d->priv_key;
+}
+
+int DSA_set0_key(DSA *d, BIGNUM *pub_key, BIGNUM *priv_key)
+{
+ if (pub_key != NULL) {
+ BN_free(d->pub_key);
+ d->pub_key = pub_key;
+ }
+ if (priv_key != NULL) {
+ BN_free(d->priv_key);
+ d->priv_key = priv_key;
+ }
+ d->dirty_cnt++;
+
+ return 1;
+}
+
+int DSA_security_bits(const DSA *d)
+{
+ if (d->params.p != NULL && d->params.q != NULL)
+ return BN_security_bits(BN_num_bits(d->params.p),
+ BN_num_bits(d->params.q));
+ return -1;
+}
+
+int DSA_bits(const DSA *dsa)
+{
+ if (dsa->params.p != NULL)
+ return BN_num_bits(dsa->params.p);
+ return -1;
+}
+
+FFC_PARAMS *ossl_dsa_get0_params(DSA *dsa)
+{
+ return &dsa->params;
+}
+
+int ossl_dsa_ffc_params_fromdata(DSA *dsa, const OSSL_PARAM params[])
+{
+ int ret;
+ FFC_PARAMS *ffc = ossl_dsa_get0_params(dsa);
+
+ ret = ossl_ffc_params_fromdata(ffc, params);
+ if (ret)
+ dsa->dirty_cnt++;
+ return ret;
+}
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