GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/engine/tb_digest.c Lines: 3 29 10.3 %
Date: 2017-11-07 Branches: 1 18 5.6 %

Line Branch Exec Source
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/* $OpenBSD: tb_digest.c,v 1.8 2017/01/29 17:49:23 beck Exp $ */
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/* ====================================================================
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 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
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 *    distribution.
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 *
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 * 3. All advertising materials mentioning features or use of this
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 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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 *
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 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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 *    endorse or promote products derived from this software without
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 *    prior written permission. For written permission, please contact
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 *    licensing@OpenSSL.org.
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 *
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 * 5. Products derived from this software may not be called "OpenSSL"
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 *    nor may "OpenSSL" appear in their names without prior written
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 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
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 *    acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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 * OF THE POSSIBILITY OF SUCH DAMAGE.
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 * ====================================================================
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 *
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 * This product includes cryptographic software written by Eric Young
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 * (eay@cryptsoft.com).  This product includes software written by Tim
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 * Hudson (tjh@cryptsoft.com).
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 *
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 */
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#include <openssl/err.h>
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#include "eng_int.h"
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/* If this symbol is defined then ENGINE_get_digest_engine(), the function that
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 * is used by EVP to hook in digest code and cache defaults (etc), will display
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 * brief debugging summaries to stderr with the 'nid'. */
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/* #define ENGINE_DIGEST_DEBUG */
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static ENGINE_TABLE *digest_table = NULL;
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void
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ENGINE_unregister_digests(ENGINE *e)
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{
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	engine_table_unregister(&digest_table, e);
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}
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static void
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engine_unregister_all_digests(void)
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{
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	engine_table_cleanup(&digest_table);
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}
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int
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ENGINE_register_digests(ENGINE *e)
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{
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	if (e->digests) {
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		const int *nids;
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		int num_nids = e->digests(e, NULL, &nids, 0);
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		if (num_nids > 0)
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			return engine_table_register(&digest_table,
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			    engine_unregister_all_digests, e, nids,
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			    num_nids, 0);
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	}
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	return 1;
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}
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void
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ENGINE_register_all_digests(void)
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{
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	ENGINE *e;
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	for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
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		ENGINE_register_digests(e);
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}
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int
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ENGINE_set_default_digests(ENGINE *e)
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{
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	if (e->digests) {
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		const int *nids;
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		int num_nids = e->digests(e, NULL, &nids, 0);
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		if (num_nids > 0)
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			return engine_table_register(&digest_table,
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			    engine_unregister_all_digests, e, nids,
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			    num_nids, 1);
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	}
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	return 1;
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}
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/* Exposed API function to get a functional reference from the implementation
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 * table (ie. try to get a functional reference from the tabled structural
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 * references) for a given digest 'nid' */
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ENGINE *
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ENGINE_get_digest_engine(int nid)
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{
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	return engine_table_select(&digest_table, nid);
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}
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/* Obtains a digest implementation from an ENGINE functional reference */
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const EVP_MD *
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ENGINE_get_digest(ENGINE *e, int nid)
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{
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	const EVP_MD *ret;
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	ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
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	if (!fn || !fn(e, &ret, NULL, nid)) {
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		ENGINEerror(ENGINE_R_UNIMPLEMENTED_DIGEST);
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		return NULL;
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	}
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	return ret;
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}
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/* Gets the digest callback from an ENGINE structure */
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ENGINE_DIGESTS_PTR
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ENGINE_get_digests(const ENGINE *e)
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{
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	return e->digests;
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}
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/* Sets the digest callback in an ENGINE structure */
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int
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ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
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{
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	e->digests = f;
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	return 1;
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}