/*
* Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "wolfssl_common.h"
#include "wolfssl_hasher.h"
#include "wolfssl_util.h"
#include <wolfssl/wolfcrypt/hash.h>
typedef struct private_wolfssl_hasher_t private_wolfssl_hasher_t;
/**
* Private data of wolfssl_hasher_t
*/
struct private_wolfssl_hasher_t {
/**
* Public interface
*/
wolfssl_hasher_t public;
/**
* The hasher to use
*/
wc_HashAlg hasher;
/**
* The hash algorithm
*/
enum wc_HashType type;
};
METHOD(hasher_t, get_hash_size, size_t,
private_wolfssl_hasher_t *this)
{
return wc_HashGetDigestSize(this->type);
}
METHOD(hasher_t, reset, bool,
private_wolfssl_hasher_t *this)
{
return wc_HashInit(&this->hasher, this->type) == 0;
}
METHOD(hasher_t, get_hash, bool,
private_wolfssl_hasher_t *this, chunk_t chunk, uint8_t *hash)
{
int ret;
ret = wc_HashUpdate(&this->hasher, this->type, chunk.ptr, chunk.len);
if (ret == 0 && hash)
{
ret = wc_HashFinal(&this->hasher, this->type, hash);
if (ret == 0)
{
return reset(this);
}
}
return ret == 0;
}
METHOD(hasher_t, allocate_hash, bool,
private_wolfssl_hasher_t *this, chunk_t chunk, chunk_t *hash)
{
if (hash)
{
*hash = chunk_alloc(get_hash_size(this));
return get_hash(this, chunk, hash->ptr);
}
return get_hash(this, chunk, NULL);
}
METHOD(hasher_t, destroy, void,
private_wolfssl_hasher_t *this)
{
wc_HashFree(&this->hasher, this->type);
free(this);
}
/*
* Described in header
*/
wolfssl_hasher_t *wolfssl_hasher_create(hash_algorithm_t algo)
{
private_wolfssl_hasher_t *this;
enum wc_HashType type;
if (!wolfssl_hash2type(algo, &type))
{
return NULL;
}
INIT(this,
.public = {
.hasher = {
.get_hash = _get_hash,
.allocate_hash = _allocate_hash,
.get_hash_size = _get_hash_size,
.reset = _reset,
.destroy = _destroy,
},
},
.type = type,
);
/* initialization */
if (!reset(this))
{
destroy(this);
return NULL;
}
return &this->public;
}
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