/* $OpenBSD: ts_verify_ctx.c,v 1.6 2014/07/10 13:58:23 jsing Exp $ */
/* Written by Zoltan Glozik (zglozik@stones.com) for the OpenSSL
 * project 2003.
 */
/* ====================================================================
 * Copyright (c) 2006 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 <string.h>

#include <openssl/err.h>
#include <openssl/objects.h>
#include <openssl/ts.h>

TS_VERIFY_CTX *
TS_VERIFY_CTX_new(void)
{
	TS_VERIFY_CTX *ctx = calloc(1, sizeof(TS_VERIFY_CTX));

	if (!ctx)
		TSerr(TS_F_TS_VERIFY_CTX_NEW, ERR_R_MALLOC_FAILURE);

	return ctx;
}

void
TS_VERIFY_CTX_init(TS_VERIFY_CTX *ctx)
{
	OPENSSL_assert(ctx != NULL);
	memset(ctx, 0, sizeof(TS_VERIFY_CTX));
}

void
TS_VERIFY_CTX_free(TS_VERIFY_CTX *ctx)
{
	if (!ctx)
		return;

	TS_VERIFY_CTX_cleanup(ctx);
	free(ctx);
}

void
TS_VERIFY_CTX_cleanup(TS_VERIFY_CTX *ctx)
{
	if (!ctx)
		return;

	X509_STORE_free(ctx->store);
	sk_X509_pop_free(ctx->certs, X509_free);

	ASN1_OBJECT_free(ctx->policy);

	X509_ALGOR_free(ctx->md_alg);
	free(ctx->imprint);

	BIO_free_all(ctx->data);

	ASN1_INTEGER_free(ctx->nonce);

	GENERAL_NAME_free(ctx->tsa_name);

	TS_VERIFY_CTX_init(ctx);
}

TS_VERIFY_CTX *
TS_REQ_to_TS_VERIFY_CTX(TS_REQ *req, TS_VERIFY_CTX *ctx)
{
	TS_VERIFY_CTX *ret = ctx;
	ASN1_OBJECT *policy;
	TS_MSG_IMPRINT *imprint;
	X509_ALGOR *md_alg;
	ASN1_OCTET_STRING *msg;
	const ASN1_INTEGER *nonce;

	OPENSSL_assert(req != NULL);
	if (ret)
		TS_VERIFY_CTX_cleanup(ret);
	else if (!(ret = TS_VERIFY_CTX_new()))
		return NULL;

	/* Setting flags. */
	ret->flags = TS_VFY_ALL_IMPRINT & ~(TS_VFY_TSA_NAME | TS_VFY_SIGNATURE);

	/* Setting policy. */
	if ((policy = TS_REQ_get_policy_id(req)) != NULL) {
		if (!(ret->policy = OBJ_dup(policy)))
			goto err;
	} else
		ret->flags &= ~TS_VFY_POLICY;

	/* Setting md_alg, imprint and imprint_len. */
	imprint = TS_REQ_get_msg_imprint(req);
	md_alg = TS_MSG_IMPRINT_get_algo(imprint);
	if (!(ret->md_alg = X509_ALGOR_dup(md_alg)))
		goto err;
	msg = TS_MSG_IMPRINT_get_msg(imprint);
	ret->imprint_len = ASN1_STRING_length(msg);
	if (!(ret->imprint = malloc(ret->imprint_len)))
		goto err;
	memcpy(ret->imprint, ASN1_STRING_data(msg), ret->imprint_len);

	/* Setting nonce. */
	if ((nonce = TS_REQ_get_nonce(req)) != NULL) {
		if (!(ret->nonce = ASN1_INTEGER_dup(nonce)))
			goto err;
	} else
		ret->flags &= ~TS_VFY_NONCE;

	return ret;

err:
	if (ctx)
		TS_VERIFY_CTX_cleanup(ctx);
	else
		TS_VERIFY_CTX_free(ret);
	return NULL;
}