70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
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* Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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/** @file
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*
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* Digest self-tests
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*
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*/
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#include <string.h>
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#include <ipxe/crypto.h>
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#include "digest_test.h"
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/**
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* Test digest algorithm
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*
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* @v digest Digest algorithm
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* @v fragments Digest test fragment list, or NULL
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* @v data Test data
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* @v len Length of test data
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* @v expected Expected digest value
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* @ret ok Digest value is as expected
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*/
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int digest_test ( struct digest_algorithm *digest,
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struct digest_test_fragments *fragments,
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void *data, size_t len, void *expected ) {
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uint8_t ctx[digest->ctxsize];
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uint8_t out[digest->digestsize];
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size_t frag_len = 0;
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unsigned int i;
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/* Initialise digest */
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digest_init ( digest, ctx );
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/* Update digest fragment-by-fragment */
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for ( i = 0 ; len && ( i < ( sizeof ( fragments->len ) /
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sizeof ( fragments->len[0] ) ) ) ; i++ ) {
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if ( fragments )
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frag_len = fragments->len[i];
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if ( ( frag_len == 0 ) || ( frag_len < len ) )
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frag_len = len;
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digest_update ( digest, ctx, data, frag_len );
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data += frag_len;
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len -= frag_len;
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}
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/* Finalise digest */
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digest_final ( digest, ctx, out );
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/* Compare against expected output */
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return ( memcmp ( expected, out, sizeof ( out ) ) == 0 );
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}
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