+small jh

[avr-crypto-lib.git] / jh / jh_simple_aux.c

diff --git a/jh/jh_simple_aux.c b/jh/jh_simple_aux.c
new file mode 100644 (file)
index 0000000..c48fa63
--- /dev/null
+++ b/jh/jh_simple_aux.c
@@ -0,0 +1,114 @@
+/* jh_simple_speed.c */
+/*
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdint.h>
+#include <avr/pgmspace.h>
+#include <stdlib.h>
+#include <string.h>
+#include "memxor.h"
+#include "jh_simple.h"
+
+#define DEBUG 0
+
+#if DEBUG
+#include "cli.h"
+#endif
+
+
+void jh_init(uint16_t hashlen_b, jh_ctx_t* ctx){
+       memset(ctx->a, 0, 128);
+       ctx->a[0] = hashlen_b>>8;
+       ctx->a[1] = hashlen_b&0xff;
+       jh_encrypt(ctx->a);
+       ctx->block_hashed=0;
+}
+
+void jh_nextBlock(jh_ctx_t* ctx, void* block){
+       memxor(ctx->a, block, 64);
+       jh_encrypt(ctx->a);
+       memxor(ctx->a+64, block, 64);
+       ctx->block_hashed++;
+}
+
+void jh_lastBlock(jh_ctx_t* ctx, void* block, uint16_t length_b){
+       while(length_b>=64*8){
+               jh_nextBlock(ctx, block);
+               block = (uint8_t*)block + 64;
+               length_b -= 64*8;
+       }
+       uint8_t buffer[64];
+       uint64_t total_length;
+       memset(buffer, 0, 64);
+       memcpy(buffer, block, (length_b+7)/8);
+       buffer[length_b/8] |= 0x80>>(length_b%8);
+       total_length=ctx->block_hashed*512+length_b;
+       if(length_b==0){
+
+       }else{
+               jh_nextBlock(ctx, buffer);
+               buffer[0]=0;
+       }
+       memset(buffer+1, 0, 64-8-1);
+       buffer[63] = total_length&0xff;
+       buffer[62] = (total_length>> 8)&0xff;
+       buffer[61] = (total_length>>16)&0xff;
+       buffer[60] = (total_length>>24)&0xff;
+       buffer[59] = (total_length>>32)&0xff;
+       buffer[58] = (total_length>>40)&0xff;
+       buffer[57] = (total_length>>48)&0xff;
+       buffer[56] = (total_length>>56)&0xff;
+       jh_nextBlock(ctx, buffer);
+}
+
+void jh_ctx2hash(void* dest, uint16_t length_b, jh_ctx_t* ctx){
+       memcpy(dest, ctx->a+128-(length_b+7)/8, (length_b+7)/8);
+}
+
+
+void jh224_init(jh_ctx_t* ctx){
+       jh_init(224, ctx);
+}
+
+void jh224_ctx2hash(void* dest, jh_ctx_t* ctx){
+       jh_ctx2hash(dest, 224, ctx);
+}
+
+void jh256_init(jh_ctx_t* ctx){
+       jh_init(256, ctx);
+}
+
+void jh256_ctx2hash(void* dest, jh_ctx_t* ctx){
+       jh_ctx2hash(dest, 256, ctx);
+}
+
+void jh384_init(jh_ctx_t* ctx){
+       jh_init(384, ctx);
+}
+
+void jh384_ctx2hash(void* dest, jh_ctx_t* ctx){
+       jh_ctx2hash(dest, 384, ctx);
+}
+
+void jh512_init(jh_ctx_t* ctx){
+       jh_init(512, ctx);
+}
+
+void jh512_ctx2hash(void* dest, jh_ctx_t* ctx){
+       jh_ctx2hash(dest, 512, ctx);
+}