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/*
* Copyright 2002-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* Copyright (C) 2019-2020 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*-
* HMAC-SHA-224/256/384/512 implementation
* Last update: 06/15/2005
* Issue date: 06/15/2005
*
* Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
* All rights reserved.
*
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
*/
#include "ogs-crypt.h"
void ogs_hmac_sha1_init(ogs_hmac_sha1_ctx *ctx, const uint8_t *key,
uint32_t key_size)
{
uint32_t fill;
uint32_t num;
uint8_t key_temp[OGS_SHA1_DIGEST_SIZE];
int i;
if (key_size == OGS_SHA1_BLOCK_SIZE) {
memcpy(key_temp, key, sizeof(key_temp));
num = OGS_SHA1_BLOCK_SIZE;
} else {
if (key_size > OGS_SHA1_BLOCK_SIZE){
num = OGS_SHA1_DIGEST_SIZE;
ogs_sha1(key, key_size, key_temp);
} else { /* key_size > SHA1_BLOCK_SIZE */
memcpy(key_temp, key, sizeof(key_temp));
num = key_size;
}
fill = OGS_SHA1_BLOCK_SIZE - num;
memset(ctx->block_ipad + num, 0x36, fill);
memset(ctx->block_opad + num, 0x5c, fill);
}
for (i = 0; i < num; i++) {
ctx->block_ipad[i] = key_temp[i] ^ 0x36;
ctx->block_opad[i] = key_temp[i] ^ 0x5c;
}
ogs_sha1_init(&ctx->ctx_inside);
ogs_sha1_update(&ctx->ctx_inside, ctx->block_ipad, OGS_SHA1_BLOCK_SIZE);
ogs_sha1_init(&ctx->ctx_outside);
ogs_sha1_update(&ctx->ctx_outside, ctx->block_opad,
OGS_SHA1_BLOCK_SIZE);
/* for hmac_reinit */
memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside,
sizeof(ogs_sha1_ctx));
memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside,
sizeof(ogs_sha1_ctx));
}
void ogs_hmac_sha1_reinit(ogs_hmac_sha1_ctx *ctx)
{
memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit,
sizeof(ogs_sha1_ctx));
memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit,
sizeof(ogs_sha1_ctx));
}
void ogs_hmac_sha1_update(ogs_hmac_sha1_ctx *ctx, const uint8_t *message,
uint32_t message_len)
{
ogs_sha1_update(&ctx->ctx_inside, message, message_len);
}
void ogs_hmac_sha1_final(ogs_hmac_sha1_ctx *ctx, uint8_t *mac,
uint32_t mac_size)
{
uint8_t digest_inside[OGS_SHA1_DIGEST_SIZE];
uint8_t mac_temp[OGS_SHA1_DIGEST_SIZE];
ogs_sha1_final(&ctx->ctx_inside, digest_inside);
ogs_sha1_update(&ctx->ctx_outside, digest_inside, OGS_SHA1_DIGEST_SIZE);
ogs_sha1_final(&ctx->ctx_outside, mac_temp);
memcpy(mac, mac_temp, mac_size);
}
void ogs_hmac_sha1(const uint8_t *key, uint32_t key_size,
const uint8_t *message, uint32_t message_len,
uint8_t *mac, uint32_t mac_size)
{
ogs_hmac_sha1_ctx ctx;
ogs_hmac_sha1_init(&ctx, key, key_size);
ogs_hmac_sha1_update(&ctx, message, message_len);
ogs_hmac_sha1_final(&ctx, mac, mac_size);
}
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