X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;ds=sidebyside;f=skein%2Fskein512.c;fp=skein%2Fskein512.c;h=2558f340d6acea02889606dab16921fe66d2fc34;hb=4f50c75ee5a6cc88bf7ea71957ed509e298e6c25;hp=0000000000000000000000000000000000000000;hpb=7701e318e4e2bac7f84dbf6e368f1501814948fc;p=avr-crypto-lib.git
diff --git a/skein/skein512.c b/skein/skein512.c
new file mode 100644
index 0000000..2558f34
--- /dev/null
+++ b/skein/skein512.c
@@ -0,0 +1,94 @@
+/* skein512.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 .
+*/
+/*
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-03-12
+ * \license GPLv3 or later
+ *
+ */
+
+#include
+#include
+#include "ubi.h"
+#include "skein.h"
+
+
+void skein512_init(skein512_ctx_t* ctx, uint16_t outsize_b){
+ skein_config_t conf;
+ uint8_t null[UBI512_BLOCKSIZE_B];
+ memset(null, 0, UBI512_BLOCKSIZE_B);
+ memset(&conf, 0, sizeof(skein_config_t));
+ conf.schema[0] = 'S';
+ conf.schema[1] = 'H';
+ conf.schema[2] = 'A';
+ conf.schema[3] = '3';
+ conf.version = 1;
+ conf.out_length = outsize_b;
+ ctx->outsize_b = outsize_b;
+ ubi512_init(&(ctx->ubictx), null, UBI_TYPE_CFG);
+ ubi512_lastBlock(&(ctx->ubictx), &conf, 256);
+ ubi512_init(&(ctx->ubictx), ctx->ubictx.g, UBI_TYPE_MSG);
+}
+
+void skein512_nextBlock(skein512_ctx_t* ctx, const void* block){
+ ubi512_nextBlock(&(ctx->ubictx), block);
+}
+
+void skein512_lastBlock(skein512_ctx_t* ctx, const void* block, uint16_t length_b){
+ ubi512_lastBlock(&(ctx->ubictx), block, length_b);
+}
+
+void skein512_ctx2hash(void* dest, skein512_ctx_t* ctx){
+ ubi512_ctx_t uctx;
+ uint16_t outsize_b;
+
+ uint64_t counter=0;
+ uint8_t outbuffer[UBI512_BLOCKSIZE_B];
+ ubi512_init(&(ctx->ubictx), ctx->ubictx.g, UBI_TYPE_OUT);
+
+ outsize_b = ctx->outsize_b;
+ while(1){
+ memcpy(&uctx, &(ctx->ubictx), sizeof(ubi512_ctx_t));
+ ubi512_lastBlock(&uctx, &counter, 64);
+ ubi512_ctx2hash(outbuffer, &uctx);
+ if(outsize_b<=UBI512_BLOCKSIZE){
+ memcpy(dest, outbuffer, (ctx->outsize_b+7)/8);
+ break;
+ }else{
+ memcpy(dest, outbuffer, UBI512_BLOCKSIZE_B);
+ dest = (uint8_t*)dest + UBI512_BLOCKSIZE_B;
+ outsize_b -= UBI512_BLOCKSIZE;
+ counter++;
+ }
+ }
+}
+
+void skein512(void* dest, uint16_t outlength_b,const void* msg, uint32_t length_b){
+ skein512_ctx_t ctx;
+ skein512_init(&ctx, outlength_b);
+ while(length_b>SKEIN512_BLOCKSIZE){
+ skein512_nextBlock(&ctx, msg);
+ msg = (uint8_t*)msg + SKEIN512_BLOCKSIZE_B;
+ length_b -= SKEIN512_BLOCKSIZE;
+ }
+ skein512_lastBlock(&ctx, msg, length_b);
+ skein512_ctx2hash(dest, &ctx);
+}
+