71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/* sha512.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <avr/pgmspace.h>
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#include "sha2_large_common.h"
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#include "sha512.h"
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void sha512_nextBlock (sha512_ctx_t *ctx, const void *block){
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sha2_large_common_nextBlock(ctx, block);
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}
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void sha512_lastBlock(sha512_ctx_t *ctx, const void *block, uint16_t length_b){
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sha2_large_common_lastBlock(ctx, block, length_b);
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}
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static const
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uint64_t sha512_init_values[8] PROGMEM = {
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0x6a09e667f3bcc908LL, 0xbb67ae8584caa73bLL, 0x3c6ef372fe94f82bLL, 0xa54ff53a5f1d36f1LL,
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0x510e527fade682d1LL, 0x9b05688c2b3e6c1fLL, 0x1f83d9abfb41bd6bLL, 0x5be0cd19137e2179LL
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};
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void sha512_init(sha512_ctx_t *ctx){
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ctx->length = 0;
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memcpy_P(ctx->h, sha512_init_values, 8*8);
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}
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void sha512_ctx2hash(void *dest, const sha512_ctx_t *ctx){
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uint8_t i=8, j, *s = (uint8_t*)(ctx->h);
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do{
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j=7;
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do{
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*((uint8_t*)dest) = s[j];
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dest = (uint8_t*)dest + 1;
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}while(j--);
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s += 8;
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}while(--i);
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}
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void sha512(void *dest, const void *msg, uint32_t length_b){
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sha512_ctx_t ctx;
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sha512_init(&ctx);
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while(length_b >= 1024){
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sha512_nextBlock(&ctx, msg);
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msg = (uint8_t*)msg + 1024/8;
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length_b -= 1024;
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}
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sha512_lastBlock(&ctx, msg, length_b);
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sha512_ctx2hash(dest, &ctx);
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}
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