--- /dev/null
+/* 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);
+}