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545 lines
18 KiB
C
545 lines
18 KiB
C
/*-
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* HMAC-SHA-224/256/384/512 implementation
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* Last update: 06/15/2005
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* Issue date: 06/15/2005
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*
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* Copyright (C) 2005 Olivier Gay <olivier.gay@a3.epfl.ch>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <string.h>
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#include "hmac_sha2.h"
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/* HMAC-SHA-224 functions */
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void hmac_sha224_init(hmac_sha224_ctx *ctx, unsigned char *key,
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unsigned int key_size)
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{
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unsigned int fill;
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unsigned int num;
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unsigned char *key_used;
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unsigned char key_temp[SHA224_DIGEST_SIZE];
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int i;
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if (key_size == SHA224_BLOCK_SIZE) {
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key_used = key;
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num = SHA224_BLOCK_SIZE;
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} else {
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if (key_size > SHA224_BLOCK_SIZE){
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key_used = key_temp;
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num = SHA224_DIGEST_SIZE;
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sha224(key, key_size, key_used);
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} else { /* key_size > SHA224_BLOCK_SIZE */
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key_used = key;
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num = key_size;
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}
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fill = SHA224_BLOCK_SIZE - num;
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memset(ctx->block_ipad + num, 0x36, fill);
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memset(ctx->block_opad + num, 0x5c, fill);
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}
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for (i = 0; i < num; i++) {
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ctx->block_ipad[i] = key_used[i] ^ 0x36;
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ctx->block_opad[i] = key_used[i] ^ 0x5c;
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}
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sha224_init(&ctx->ctx_inside);
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sha224_update(&ctx->ctx_inside, ctx->block_ipad, SHA224_BLOCK_SIZE);
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sha224_init(&ctx->ctx_outside);
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sha224_update(&ctx->ctx_outside, ctx->block_opad,
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SHA224_BLOCK_SIZE);
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/* for hmac_reinit */
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memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside,
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sizeof(sha224_ctx));
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memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside,
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sizeof(sha224_ctx));
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}
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void hmac_sha224_reinit(hmac_sha224_ctx *ctx)
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{
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memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit,
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sizeof(sha224_ctx));
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memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit,
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sizeof(sha224_ctx));
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}
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void hmac_sha224_update(hmac_sha224_ctx *ctx, unsigned char *message,
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unsigned int message_len)
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{
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sha224_update(&ctx->ctx_inside, message, message_len);
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}
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void hmac_sha224_final(hmac_sha224_ctx *ctx, unsigned char *mac,
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unsigned int mac_size)
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{
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unsigned char digest_inside[SHA224_DIGEST_SIZE];
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unsigned char mac_temp[SHA224_DIGEST_SIZE];
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sha224_final(&ctx->ctx_inside, digest_inside);
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sha224_update(&ctx->ctx_outside, digest_inside, SHA224_DIGEST_SIZE);
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sha224_final(&ctx->ctx_outside, mac_temp);
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memcpy(mac, mac_temp, mac_size);
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}
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void hmac_sha224(unsigned char *key, unsigned int key_size,
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unsigned char *message, unsigned int message_len,
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unsigned char *mac, unsigned mac_size)
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{
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hmac_sha224_ctx ctx;
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hmac_sha224_init(&ctx, key, key_size);
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hmac_sha224_update(&ctx, message, message_len);
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hmac_sha224_final(&ctx, mac, mac_size);
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}
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/* HMAC-SHA-256 functions */
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void hmac_sha256_init(hmac_sha256_ctx *ctx, unsigned char *key,
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unsigned int key_size)
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{
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unsigned int fill;
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unsigned int num;
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unsigned char *key_used;
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unsigned char key_temp[SHA256_DIGEST_SIZE];
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int i;
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if (key_size == SHA256_BLOCK_SIZE) {
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key_used = key;
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num = SHA256_BLOCK_SIZE;
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} else {
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if (key_size > SHA256_BLOCK_SIZE){
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key_used = key_temp;
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num = SHA256_DIGEST_SIZE;
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sha256(key, key_size, key_used);
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} else { /* key_size > SHA256_BLOCK_SIZE */
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key_used = key;
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num = key_size;
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}
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fill = SHA256_BLOCK_SIZE - num;
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memset(ctx->block_ipad + num, 0x36, fill);
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memset(ctx->block_opad + num, 0x5c, fill);
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}
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for (i = 0; i < num; i++) {
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ctx->block_ipad[i] = key_used[i] ^ 0x36;
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ctx->block_opad[i] = key_used[i] ^ 0x5c;
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}
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sha256_init(&ctx->ctx_inside);
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sha256_update(&ctx->ctx_inside, ctx->block_ipad, SHA256_BLOCK_SIZE);
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sha256_init(&ctx->ctx_outside);
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sha256_update(&ctx->ctx_outside, ctx->block_opad,
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SHA256_BLOCK_SIZE);
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/* for hmac_reinit */
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memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside,
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sizeof(sha256_ctx));
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memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside,
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sizeof(sha256_ctx));
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}
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void hmac_sha256_reinit(hmac_sha256_ctx *ctx)
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{
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memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit,
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sizeof(sha256_ctx));
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memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit,
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sizeof(sha256_ctx));
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}
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void hmac_sha256_update(hmac_sha256_ctx *ctx, unsigned char *message,
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unsigned int message_len)
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{
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sha256_update(&ctx->ctx_inside, message, message_len);
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}
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void hmac_sha256_final(hmac_sha256_ctx *ctx, unsigned char *mac,
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unsigned int mac_size)
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{
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unsigned char digest_inside[SHA256_DIGEST_SIZE];
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unsigned char mac_temp[SHA256_DIGEST_SIZE];
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sha256_final(&ctx->ctx_inside, digest_inside);
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sha256_update(&ctx->ctx_outside, digest_inside, SHA256_DIGEST_SIZE);
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sha256_final(&ctx->ctx_outside, mac_temp);
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memcpy(mac, mac_temp, mac_size);
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}
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void hmac_sha256(unsigned char *key, unsigned int key_size,
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unsigned char *message, unsigned int message_len,
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unsigned char *mac, unsigned mac_size)
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{
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hmac_sha256_ctx ctx;
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hmac_sha256_init(&ctx, key, key_size);
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hmac_sha256_update(&ctx, message, message_len);
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hmac_sha256_final(&ctx, mac, mac_size);
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}
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/* HMAC-SHA-384 functions */
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void hmac_sha384_init(hmac_sha384_ctx *ctx, unsigned char *key,
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unsigned int key_size)
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{
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unsigned int fill;
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unsigned int num;
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unsigned char *key_used;
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unsigned char key_temp[SHA384_DIGEST_SIZE];
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int i;
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if (key_size == SHA384_BLOCK_SIZE) {
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key_used = key;
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num = SHA384_BLOCK_SIZE;
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} else {
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if (key_size > SHA384_BLOCK_SIZE){
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key_used = key_temp;
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num = SHA384_DIGEST_SIZE;
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sha384(key, key_size, key_used);
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} else { /* key_size > SHA384_BLOCK_SIZE */
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key_used = key;
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num = key_size;
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}
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fill = SHA384_BLOCK_SIZE - num;
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memset(ctx->block_ipad + num, 0x36, fill);
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memset(ctx->block_opad + num, 0x5c, fill);
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}
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for (i = 0; i < num; i++) {
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ctx->block_ipad[i] = key_used[i] ^ 0x36;
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ctx->block_opad[i] = key_used[i] ^ 0x5c;
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}
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sha384_init(&ctx->ctx_inside);
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sha384_update(&ctx->ctx_inside, ctx->block_ipad, SHA384_BLOCK_SIZE);
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sha384_init(&ctx->ctx_outside);
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sha384_update(&ctx->ctx_outside, ctx->block_opad,
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SHA384_BLOCK_SIZE);
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/* for hmac_reinit */
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memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside,
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sizeof(sha384_ctx));
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memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside,
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sizeof(sha384_ctx));
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}
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void hmac_sha384_reinit(hmac_sha384_ctx *ctx)
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{
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memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit,
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sizeof(sha384_ctx));
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memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit,
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sizeof(sha384_ctx));
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}
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void hmac_sha384_update(hmac_sha384_ctx *ctx, unsigned char *message,
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unsigned int message_len)
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{
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sha384_update(&ctx->ctx_inside, message, message_len);
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}
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void hmac_sha384_final(hmac_sha384_ctx *ctx, unsigned char *mac,
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unsigned int mac_size)
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{
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unsigned char digest_inside[SHA384_DIGEST_SIZE];
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unsigned char mac_temp[SHA384_DIGEST_SIZE];
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sha384_final(&ctx->ctx_inside, digest_inside);
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sha384_update(&ctx->ctx_outside, digest_inside, SHA384_DIGEST_SIZE);
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sha384_final(&ctx->ctx_outside, mac_temp);
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memcpy(mac, mac_temp, mac_size);
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}
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void hmac_sha384(unsigned char *key, unsigned int key_size,
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unsigned char *message, unsigned int message_len,
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unsigned char *mac, unsigned mac_size)
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{
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hmac_sha384_ctx ctx;
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hmac_sha384_init(&ctx, key, key_size);
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hmac_sha384_update(&ctx, message, message_len);
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hmac_sha384_final(&ctx, mac, mac_size);
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}
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/* HMAC-SHA-512 functions */
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void hmac_sha512_init(hmac_sha512_ctx *ctx, unsigned char *key,
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unsigned int key_size)
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{
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unsigned int fill;
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unsigned int num;
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unsigned char *key_used;
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unsigned char key_temp[SHA512_DIGEST_SIZE];
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int i;
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if (key_size == SHA512_BLOCK_SIZE) {
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key_used = key;
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num = SHA512_BLOCK_SIZE;
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} else {
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if (key_size > SHA512_BLOCK_SIZE){
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key_used = key_temp;
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num = SHA512_DIGEST_SIZE;
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sha512(key, key_size, key_used);
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} else { /* key_size > SHA512_BLOCK_SIZE */
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key_used = key;
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num = key_size;
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}
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fill = SHA512_BLOCK_SIZE - num;
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memset(ctx->block_ipad + num, 0x36, fill);
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memset(ctx->block_opad + num, 0x5c, fill);
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}
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for (i = 0; i < num; i++) {
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ctx->block_ipad[i] = key_used[i] ^ 0x36;
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ctx->block_opad[i] = key_used[i] ^ 0x5c;
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}
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sha512_init(&ctx->ctx_inside);
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sha512_update(&ctx->ctx_inside, ctx->block_ipad, SHA512_BLOCK_SIZE);
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sha512_init(&ctx->ctx_outside);
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sha512_update(&ctx->ctx_outside, ctx->block_opad,
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SHA512_BLOCK_SIZE);
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/* for hmac_reinit */
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memcpy(&ctx->ctx_inside_reinit, &ctx->ctx_inside,
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sizeof(sha512_ctx));
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memcpy(&ctx->ctx_outside_reinit, &ctx->ctx_outside,
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sizeof(sha512_ctx));
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}
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void hmac_sha512_reinit(hmac_sha512_ctx *ctx)
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{
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memcpy(&ctx->ctx_inside, &ctx->ctx_inside_reinit,
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sizeof(sha512_ctx));
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memcpy(&ctx->ctx_outside, &ctx->ctx_outside_reinit,
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sizeof(sha512_ctx));
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}
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void hmac_sha512_update(hmac_sha512_ctx *ctx, unsigned char *message,
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unsigned int message_len)
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{
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sha512_update(&ctx->ctx_inside, message, message_len);
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}
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void hmac_sha512_final(hmac_sha512_ctx *ctx, unsigned char *mac,
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unsigned int mac_size)
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{
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unsigned char digest_inside[SHA512_DIGEST_SIZE];
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unsigned char mac_temp[SHA512_DIGEST_SIZE];
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sha512_final(&ctx->ctx_inside, digest_inside);
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sha512_update(&ctx->ctx_outside, digest_inside, SHA512_DIGEST_SIZE);
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sha512_final(&ctx->ctx_outside, mac_temp);
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memcpy(mac, mac_temp, mac_size);
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}
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void hmac_sha512(unsigned char *key, unsigned int key_size,
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unsigned char *message, unsigned int message_len,
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unsigned char *mac, unsigned mac_size)
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{
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hmac_sha512_ctx ctx;
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hmac_sha512_init(&ctx, key, key_size);
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hmac_sha512_update(&ctx, message, message_len);
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hmac_sha512_final(&ctx, mac, mac_size);
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}
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#ifdef TEST_VECTORS
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/* IETF Validation tests */
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#include <stdio.h>
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#include <stdlib.h>
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void test(unsigned char *vector, unsigned char *digest,
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unsigned int digest_size)
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{
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unsigned char output[2 * SHA512_DIGEST_SIZE + 1];
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int i;
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output[2 * digest_size] = '\0';
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for (i = 0; i < digest_size ; i++) {
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sprintf((char *) output + 2*i, "%02x", digest[i]);
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}
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printf("H: %s\n", output);
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if (strcmp((char *) vector, (char *) output)) {
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fprintf(stderr, "Test failed.\n");
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exit(1);
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}
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}
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int main()
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{
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static unsigned char *vectors[] =
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{
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/* HMAC-SHA-224 */
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"896fb1128abbdf196832107cd49df33f47b4b1169912ba4f53684b22",
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"a30e01098bc6dbbf45690f3a7e9e6d0f8bbea2a39e6148008fd05e44",
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"7fb3cb3588c6c1f6ffa9694d7d6ad2649365b0c1f65d69d1ec8333ea",
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"6c11506874013cac6a2abc1bb382627cec6a90d86efc012de7afec5a",
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"0e2aea68a90c8d37c988bcdb9fca6fa8",
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"95e9a0db962095adaebe9b2d6f0dbce2d499f112f2d2b7273fa6870e",
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"3a854166ac5d9f023f54d517d0b39dbd946770db9c2b95c9f6f565d1",
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/* HMAC-SHA-256 */
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"b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7",
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"5bdcc146bf60754e6a042426089575c75a003f089d2739839dec58b964ec3843",
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"773ea91e36800e46854db8ebd09181a72959098b3ef8c122d9635514ced565fe",
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"82558a389a443c0ea4cc819899f2083a85f0faa3e578f8077a2e3ff46729665b",
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"a3b6167473100ee06e0c796c2955552b",
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"60e431591ee0b67f0d8a26aacbf5b77f8e0bc6213728c5140546040f0ee37f54",
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"9b09ffa71b942fcb27635fbcd5b0e944bfdc63644f0713938a7f51535c3a35e2",
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/* HMAC-SHA-384 */
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"afd03944d84895626b0825f4ab46907f15f9dadbe4101ec682aa034c7cebc59c"
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"faea9ea9076ede7f4af152e8b2fa9cb6",
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"af45d2e376484031617f78d2b58a6b1b9c7ef464f5a01b47e42ec3736322445e"
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"8e2240ca5e69e2c78b3239ecfab21649",
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"88062608d3e6ad8a0aa2ace014c8a86f0aa635d947ac9febe83ef4e55966144b"
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"2a5ab39dc13814b94e3ab6e101a34f27",
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"3e8a69b7783c25851933ab6290af6ca77a9981480850009cc5577c6e1f573b4e"
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"6801dd23c4a7d679ccf8a386c674cffb",
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"3abf34c3503b2a23a46efc619baef897",
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"4ece084485813e9088d2c63a041bc5b44f9ef1012a2b588f3cd11f05033ac4c6"
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"0c2ef6ab4030fe8296248df163f44952",
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"6617178e941f020d351e2f254e8fd32c602420feb0b8fb9adccebb82461e99c5"
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"a678cc31e799176d3860e6110c46523e",
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/* HMAC-SHA-512 */
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"87aa7cdea5ef619d4ff0b4241a1d6cb02379f4e2ce4ec2787ad0b30545e17cde"
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"daa833b7d6b8a702038b274eaea3f4e4be9d914eeb61f1702e696c203a126854",
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"164b7a7bfcf819e2e395fbe73b56e0a387bd64222e831fd610270cd7ea250554"
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"9758bf75c05a994a6d034f65f8f0e6fdcaeab1a34d4a6b4b636e070a38bce737",
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"fa73b0089d56a284efb0f0756c890be9b1b5dbdd8ee81a3655f83e33b2279d39"
|
|
"bf3e848279a722c806b485a47e67c807b946a337bee8942674278859e13292fb",
|
|
"b0ba465637458c6990e5a8c5f61d4af7e576d97ff94b872de76f8050361ee3db"
|
|
"a91ca5c11aa25eb4d679275cc5788063a5f19741120c4f2de2adebeb10a298dd",
|
|
"415fad6271580a531d4179bc891d87a6",
|
|
"80b24263c7c1a3ebb71493c1dd7be8b49b46d1f41b4aeec1121b013783f8f352"
|
|
"6b56d037e05f2598bd0fd2215d6a1e5295e64f73f63f0aec8b915a985d786598",
|
|
"e37b6a775dc87dbaa4dfa9f96e5e3ffddebd71f8867289865df5a32d20cdc944"
|
|
"b6022cac3c4982b10d5eeb55c3e4de15134676fb6de0446065c97440fa8c6a58"
|
|
};
|
|
|
|
static unsigned char *messages[] =
|
|
{
|
|
"Hi There",
|
|
"what do ya want for nothing?",
|
|
NULL,
|
|
NULL,
|
|
"Test With Truncation",
|
|
"Test Using Larger Than Block-Size Key - Hash Key First",
|
|
"This is a test using a larger than block-size key "
|
|
"and a larger than block-size data. The key needs"
|
|
" to be hashed before being used by the HMAC algorithm."
|
|
};
|
|
|
|
unsigned char mac[SHA512_DIGEST_SIZE];
|
|
unsigned char *keys[7];
|
|
unsigned int keys_len[7] = {20, 4, 20, 25, 20, 131, 131};
|
|
unsigned int messages2and3_len = 50;
|
|
unsigned int mac_224_size, mac_256_size, mac_384_size, mac_512_size;
|
|
int i;
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
keys[i] = malloc(keys_len[i]);
|
|
if (keys[i] == NULL) {
|
|
fprintf(stderr, "Can't allocate memory\n");
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
memset(keys[0], 0x0b, keys_len[0]);
|
|
strcpy(keys[1], "Jefe");
|
|
memset(keys[2], 0xaa, keys_len[2]);
|
|
for (i = 0; i < keys_len[3]; i++)
|
|
keys[3][i] = (unsigned char) i + 1;
|
|
memset(keys[4], 0x0c, keys_len[4]);
|
|
memset(keys[5], 0xaa, keys_len[5]);
|
|
memset(keys[6], 0xaa, keys_len[6]);
|
|
|
|
messages[2] = malloc(messages2and3_len + 1);
|
|
messages[3] = malloc(messages2and3_len + 1);
|
|
|
|
if (messages[2] == NULL || messages[3] == NULL) {
|
|
fprintf(stderr, "Can't allocate memory\n");
|
|
return 1;
|
|
}
|
|
|
|
messages[2][messages2and3_len] = '\0';
|
|
messages[3][messages2and3_len] = '\0';
|
|
|
|
memset(messages[2], 0xdd, messages2and3_len);
|
|
memset(messages[3], 0xcd, messages2and3_len);
|
|
|
|
printf("HMAC-SHA-2 IETF Validation tests\n\n");
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
if (i != 4) {
|
|
mac_224_size = SHA224_DIGEST_SIZE;
|
|
mac_256_size = SHA256_DIGEST_SIZE;
|
|
mac_384_size = SHA384_DIGEST_SIZE;
|
|
mac_512_size = SHA512_DIGEST_SIZE;
|
|
} else {
|
|
mac_224_size = 128 / 8; mac_256_size = 128 / 8;
|
|
mac_384_size = 128 / 8; mac_512_size = 128 / 8;
|
|
}
|
|
|
|
printf("Test %d:\n", i + 1);
|
|
|
|
hmac_sha224(keys[i], keys_len[i], messages[i], strlen(messages[i]),
|
|
mac, mac_224_size);
|
|
test(vectors[i], mac, mac_224_size );
|
|
hmac_sha256(keys[i], keys_len[i], messages[i], strlen(messages[i]),
|
|
mac, mac_256_size);
|
|
test(vectors[7 + i], mac, mac_256_size);
|
|
hmac_sha384(keys[i], keys_len[i], messages[i], strlen(messages[i]),
|
|
mac, mac_384_size);
|
|
test(vectors[14 + i], mac, mac_384_size);
|
|
hmac_sha512(keys[i], keys_len[i], messages[i], strlen(messages[i]),
|
|
mac, mac_512_size);
|
|
test(vectors[21 + i], mac, mac_512_size);
|
|
}
|
|
|
|
printf("All tests passed.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* TEST_VECTORS */
|
|
|