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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreHash
*
* @brief This source file the implementation of _Hash_Finalize().
*/
/*
* Copyright (C) 2021 embedded brains GmbH & Co. KG
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/hash.h>
#include <rtems/score/assert.h>
#include <rtems/base64.h>
#include <limits.h>
static void _Hash_Put_char( int c, void *arg )
{
Hash_Context *context;
size_t index;
context = arg;
index = context->index;
_Assert( index < sizeof( context->hash->chars ) );
context->hash->chars[ context->index ] = (char) c;
context->index = index + 1;
}
void _Hash_Finalize( Hash_Context *context, Hash_Control *hash )
{
unsigned char digest[ 32 ];
int n;
SHA256_Final( digest, &context->Context );
context->hash = hash;
context->index = 0;
hash->chars[ sizeof( *hash ) - 1 ] = '\0';
n = _Base64url_Encode(
_Hash_Put_char,
context,
digest,
sizeof( digest ),
NULL,
INT_MAX
);
_Assert_Unused_variable_equals( n, sizeof( *hash ) - 1 );
}
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