143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/* ====================================================================
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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 "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 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 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 ENGINE_register_digests(ENGINE *e)
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{
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if(e->digests)
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{
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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 ENGINE_register_all_digests()
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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 ENGINE_set_default_digests(ENGINE *e)
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{
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if(e->digests)
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{
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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 *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 *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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{
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ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST,
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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 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 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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}
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