165 lines
3.6 KiB
C
165 lines
3.6 KiB
C
/*
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* Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "wolfssl_common.h"
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#ifndef NO_SHA
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#include "wolfssl_sha1_prf.h"
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#include <wolfssl/wolfcrypt/sha.h>
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#include <crypto/hashers/hasher.h>
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typedef struct private_wolfssl_sha1_prf_t private_wolfssl_sha1_prf_t;
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/**
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* Private data of an wolfssl_sha1_prf_t object.
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*/
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struct private_wolfssl_sha1_prf_t {
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/**
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* Public wolfssl_sha1_prf_t interface
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*/
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wolfssl_sha1_prf_t public;
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/**
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* SHA1 context
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*/
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wc_Sha sha1;
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};
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METHOD(prf_t, get_bytes, bool,
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private_wolfssl_sha1_prf_t *this, chunk_t seed, uint8_t *bytes)
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{
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if (wc_ShaUpdate(&this->sha1, seed.ptr, seed.len) != 0)
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{
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return FALSE;
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}
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if (bytes)
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{
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uint32_t *hash = (uint32_t*)bytes;
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hash[0] = htonl(this->sha1.digest[0]);
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hash[1] = htonl(this->sha1.digest[1]);
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hash[2] = htonl(this->sha1.digest[2]);
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hash[3] = htonl(this->sha1.digest[3]);
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hash[4] = htonl(this->sha1.digest[4]);
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}
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return TRUE;
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}
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METHOD(prf_t, get_block_size, size_t,
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private_wolfssl_sha1_prf_t *this)
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{
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return HASH_SIZE_SHA1;
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}
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METHOD(prf_t, allocate_bytes, bool,
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private_wolfssl_sha1_prf_t *this, chunk_t seed, chunk_t *chunk)
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{
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if (chunk)
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{
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*chunk = chunk_alloc(HASH_SIZE_SHA1);
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return get_bytes(this, seed, chunk->ptr);
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}
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return get_bytes(this, seed, NULL);
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}
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METHOD(prf_t, get_key_size, size_t,
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private_wolfssl_sha1_prf_t *this)
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{
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return HASH_SIZE_SHA1;
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}
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METHOD(prf_t, set_key, bool,
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private_wolfssl_sha1_prf_t *this, chunk_t key)
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{
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if (wc_InitSha(&this->sha1) != 0)
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{
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return FALSE;
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}
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if (key.len % 4)
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{
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return FALSE;
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}
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if (key.len >= 4)
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{
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this->sha1.digest[0] ^= untoh32(key.ptr);
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}
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if (key.len >= 8)
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{
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this->sha1.digest[1] ^= untoh32(key.ptr + 4);
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}
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if (key.len >= 12)
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{
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this->sha1.digest[2] ^= untoh32(key.ptr + 8);
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}
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if (key.len >= 16)
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{
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this->sha1.digest[3] ^= untoh32(key.ptr + 12);
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}
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if (key.len >= 20)
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{
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this->sha1.digest[4] ^= untoh32(key.ptr + 16);
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}
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return TRUE;
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}
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METHOD(prf_t, destroy, void,
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private_wolfssl_sha1_prf_t *this)
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{
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wc_ShaFree(&this->sha1);
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free(this);
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}
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/*
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* Described in header
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*/
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wolfssl_sha1_prf_t *wolfssl_sha1_prf_create(pseudo_random_function_t algo)
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{
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private_wolfssl_sha1_prf_t *this;
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INIT(this,
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.public = {
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.prf = {
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.get_block_size = _get_block_size,
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.get_bytes = _get_bytes,
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.allocate_bytes = _allocate_bytes,
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.get_key_size = _get_key_size,
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.set_key = _set_key,
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.destroy = _destroy,
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},
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},
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);
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if (wc_InitSha(&this->sha1) != 0)
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{
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free(this);
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return NULL;
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}
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return &this->public;
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}
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#endif /* NO_SHA */
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