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- /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 2000. */
- /* ====================================================================
- * Copyright (c) 2000-2005 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 <openssl/dsa.h>
-
- #include <assert.h>
-
- #include <openssl/bn.h>
- #include <openssl/bytestring.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
-
- #include "../bytestring/internal.h"
-
-
- static int parse_integer(CBS *cbs, BIGNUM **out) {
- assert(*out == NULL);
- *out = BN_new();
- if (*out == NULL) {
- return 0;
- }
- return BN_parse_asn1_unsigned(cbs, *out);
- }
-
- static int marshal_integer(CBB *cbb, BIGNUM *bn) {
- if (bn == NULL) {
- /* A DSA object may be missing some components. */
- OPENSSL_PUT_ERROR(DSA, ERR_R_PASSED_NULL_PARAMETER);
- return 0;
- }
- return BN_marshal_asn1(cbb, bn);
- }
-
- DSA_SIG *DSA_SIG_parse(CBS *cbs) {
- DSA_SIG *ret = DSA_SIG_new();
- if (ret == NULL) {
- return NULL;
- }
- CBS child;
- if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
- !parse_integer(&child, &ret->r) ||
- !parse_integer(&child, &ret->s) ||
- CBS_len(&child) != 0) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
- DSA_SIG_free(ret);
- return NULL;
- }
- return ret;
- }
-
- int DSA_SIG_marshal(CBB *cbb, const DSA_SIG *sig) {
- CBB child;
- if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
- !marshal_integer(&child, sig->r) ||
- !marshal_integer(&child, sig->s) ||
- !CBB_flush(cbb)) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
- return 0;
- }
- return 1;
- }
-
- DSA *DSA_parse_public_key(CBS *cbs) {
- DSA *ret = DSA_new();
- if (ret == NULL) {
- return NULL;
- }
- CBS child;
- if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
- !parse_integer(&child, &ret->pub_key) ||
- !parse_integer(&child, &ret->p) ||
- !parse_integer(&child, &ret->q) ||
- !parse_integer(&child, &ret->g) ||
- CBS_len(&child) != 0) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
- DSA_free(ret);
- return NULL;
- }
- return ret;
- }
-
- int DSA_marshal_public_key(CBB *cbb, const DSA *dsa) {
- CBB child;
- if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
- !marshal_integer(&child, dsa->pub_key) ||
- !marshal_integer(&child, dsa->p) ||
- !marshal_integer(&child, dsa->q) ||
- !marshal_integer(&child, dsa->g) ||
- !CBB_flush(cbb)) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
- return 0;
- }
- return 1;
- }
-
- DSA *DSA_parse_parameters(CBS *cbs) {
- DSA *ret = DSA_new();
- if (ret == NULL) {
- return NULL;
- }
- CBS child;
- if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
- !parse_integer(&child, &ret->p) ||
- !parse_integer(&child, &ret->q) ||
- !parse_integer(&child, &ret->g) ||
- CBS_len(&child) != 0) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
- DSA_free(ret);
- return NULL;
- }
- return ret;
- }
-
- int DSA_marshal_parameters(CBB *cbb, const DSA *dsa) {
- CBB child;
- if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
- !marshal_integer(&child, dsa->p) ||
- !marshal_integer(&child, dsa->q) ||
- !marshal_integer(&child, dsa->g) ||
- !CBB_flush(cbb)) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
- return 0;
- }
- return 1;
- }
-
- DSA *DSA_parse_private_key(CBS *cbs) {
- DSA *ret = DSA_new();
- if (ret == NULL) {
- return NULL;
- }
-
- CBS child;
- uint64_t version;
- if (!CBS_get_asn1(cbs, &child, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1_uint64(&child, &version)) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
- goto err;
- }
-
- if (version != 0) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_BAD_VERSION);
- goto err;
- }
-
- if (!parse_integer(&child, &ret->p) ||
- !parse_integer(&child, &ret->q) ||
- !parse_integer(&child, &ret->g) ||
- !parse_integer(&child, &ret->pub_key) ||
- !parse_integer(&child, &ret->priv_key) ||
- CBS_len(&child) != 0) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_DECODE_ERROR);
- goto err;
- }
- return ret;
-
- err:
- DSA_free(ret);
- return NULL;
- }
-
- int DSA_marshal_private_key(CBB *cbb, const DSA *dsa) {
- CBB child;
- if (!CBB_add_asn1(cbb, &child, CBS_ASN1_SEQUENCE) ||
- !CBB_add_asn1_uint64(&child, 0 /* version */) ||
- !marshal_integer(&child, dsa->p) ||
- !marshal_integer(&child, dsa->q) ||
- !marshal_integer(&child, dsa->g) ||
- !marshal_integer(&child, dsa->pub_key) ||
- !marshal_integer(&child, dsa->priv_key) ||
- !CBB_flush(cbb)) {
- OPENSSL_PUT_ERROR(DSA, DSA_R_ENCODE_ERROR);
- return 0;
- }
- return 1;
- }
-
- DSA_SIG *d2i_DSA_SIG(DSA_SIG **out_sig, const uint8_t **inp, long len) {
- if (len < 0) {
- return NULL;
- }
- CBS cbs;
- CBS_init(&cbs, *inp, (size_t)len);
- DSA_SIG *ret = DSA_SIG_parse(&cbs);
- if (ret == NULL) {
- return NULL;
- }
- if (out_sig != NULL) {
- DSA_SIG_free(*out_sig);
- *out_sig = ret;
- }
- *inp = CBS_data(&cbs);
- return ret;
- }
-
- int i2d_DSA_SIG(const DSA_SIG *in, uint8_t **outp) {
- CBB cbb;
- if (!CBB_init(&cbb, 0) ||
- !DSA_SIG_marshal(&cbb, in)) {
- CBB_cleanup(&cbb);
- return -1;
- }
- return CBB_finish_i2d(&cbb, outp);
- }
-
- DSA *d2i_DSAPublicKey(DSA **out, const uint8_t **inp, long len) {
- if (len < 0) {
- return NULL;
- }
- CBS cbs;
- CBS_init(&cbs, *inp, (size_t)len);
- DSA *ret = DSA_parse_public_key(&cbs);
- if (ret == NULL) {
- return NULL;
- }
- if (out != NULL) {
- DSA_free(*out);
- *out = ret;
- }
- *inp = CBS_data(&cbs);
- return ret;
- }
-
- int i2d_DSAPublicKey(const DSA *in, uint8_t **outp) {
- CBB cbb;
- if (!CBB_init(&cbb, 0) ||
- !DSA_marshal_public_key(&cbb, in)) {
- CBB_cleanup(&cbb);
- return -1;
- }
- return CBB_finish_i2d(&cbb, outp);
- }
-
- DSA *d2i_DSAPrivateKey(DSA **out, const uint8_t **inp, long len) {
- if (len < 0) {
- return NULL;
- }
- CBS cbs;
- CBS_init(&cbs, *inp, (size_t)len);
- DSA *ret = DSA_parse_private_key(&cbs);
- if (ret == NULL) {
- return NULL;
- }
- if (out != NULL) {
- DSA_free(*out);
- *out = ret;
- }
- *inp = CBS_data(&cbs);
- return ret;
- }
-
- int i2d_DSAPrivateKey(const DSA *in, uint8_t **outp) {
- CBB cbb;
- if (!CBB_init(&cbb, 0) ||
- !DSA_marshal_private_key(&cbb, in)) {
- CBB_cleanup(&cbb);
- return -1;
- }
- return CBB_finish_i2d(&cbb, outp);
- }
-
- DSA *d2i_DSAparams(DSA **out, const uint8_t **inp, long len) {
- if (len < 0) {
- return NULL;
- }
- CBS cbs;
- CBS_init(&cbs, *inp, (size_t)len);
- DSA *ret = DSA_parse_parameters(&cbs);
- if (ret == NULL) {
- return NULL;
- }
- if (out != NULL) {
- DSA_free(*out);
- *out = ret;
- }
- *inp = CBS_data(&cbs);
- return ret;
- }
-
- int i2d_DSAparams(const DSA *in, uint8_t **outp) {
- CBB cbb;
- if (!CBB_init(&cbb, 0) ||
- !DSA_marshal_parameters(&cbb, in)) {
- CBB_cleanup(&cbb);
- return -1;
- }
- return CBB_finish_i2d(&cbb, outp);
- }
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