--- /dev/null
+/* ubi1024.c */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2009 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/>.
+*/
+/*
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-03-12
+ * \license GPLv3 or later
+ *
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include "threefish.h"
+#include "memxor.h"
+#include "ubi.h"
+
+void ubi1024_init(ubi1024_ctx_t* ctx, const void* g, uint8_t type){
+ memset(ctx->tweak, 0, 15);
+ ctx->tweak[15] = 0x40+type;
+ memcpy(ctx->g, g, UBI1024_BLOCKSIZE_B);
+}
+
+void ubi1024_nextBlock(ubi1024_ctx_t* ctx, const void* block){
+ threefish1024_ctx_t tfctx;
+ ((uint64_t*)(ctx->tweak))[0] += UBI1024_BLOCKSIZE_B;
+ threefish1024_init(ctx->g, ctx->tweak, &tfctx);
+ memcpy(ctx->g, block, UBI1024_BLOCKSIZE_B);
+ threefish1024_enc(ctx->g, &tfctx);
+ memxor(ctx->g, block, UBI1024_BLOCKSIZE_B);
+ ctx->tweak[15] &= (uint8_t)~0x40;
+}
+
+
+void ubi1024_lastBlock(ubi1024_ctx_t* ctx, const void* block, uint16_t length_b){
+ threefish1024_ctx_t tfctx;
+ while(length_b>UBI1024_BLOCKSIZE){
+ ubi1024_nextBlock(ctx, block);
+ block = (uint8_t*)block + UBI1024_BLOCKSIZE_B;
+ length_b -= UBI1024_BLOCKSIZE;
+ }
+ ctx->tweak[15] |= 0x80;
+ ((uint64_t*)(ctx->tweak))[0] += (length_b+7)/8;
+ if(length_b & 0x07)
+ ctx->tweak[14] |= 0x80;
+ threefish1024_init(ctx->g, ctx->tweak, &tfctx);
+ memset(ctx->g, 0, UBI1024_BLOCKSIZE_B);
+ memcpy(ctx->g, block, (length_b+7)/8);
+ if(length_b & 0x07)
+ ctx->g[(length_b+7)/8-1] |= 0x80>>(length_b&7);
+ threefish1024_enc(ctx->g, &tfctx);
+ memxor(ctx->g, block, (length_b+7)/8);
+ if(length_b & 0x07){
+ ctx->g[((length_b+7)/8)-1] ^= 0x80>>(length_b&7);
+ }
+}
+
+void ubi1024_ctx2hash(void* dest, const ubi1024_ctx_t* ctx){
+ memcpy(dest, ctx->g, UBI1024_BLOCKSIZE_B);
+}
+