+ HashFunctionAbstractionLayer (hfal) for skein +some bug fixes

[avr-crypto-lib.git] / ubi512.c

diff --git a/ubi512.c b/ubi512.c
index c5e6f51abc160ed653da74461210663be828effe..d6bab2d30e151464eea38cb9ed29918c45ecd52c 100644 (file)
--- a/ubi512.c
+++ b/ubi512.c
@@ -30,13 +30,13 @@
 #include "memxor.h"
 #include "ubi.h"
 
-void ubi512_init(ubi512_ctx_t* ctx, void* g, uint8_t type){
+void ubi512_init(ubi512_ctx_t* ctx, const void* g, uint8_t type){
        memset(ctx->tweak, 0, 15);
        ctx->tweak[15] = 0x40+type;
        memcpy(ctx->g, g, UBI512_BLOCKSIZE_B);
 }
 
-void ubi512_nextBlock(ubi512_ctx_t* ctx, void* block){
+void ubi512_nextBlock(ubi512_ctx_t* ctx, const void* block){
        threefish512_ctx_t tfctx;
        ((uint64_t*)(ctx->tweak))[0] += UBI512_BLOCKSIZE_B;
        threefish512_init(ctx->g, ctx->tweak, &tfctx);
@@ -47,7 +47,7 @@ void ubi512_nextBlock(ubi512_ctx_t* ctx, void* block){
 } 
 
 
-void ubi512_lastBlock(ubi512_ctx_t* ctx, void* block, uint16_t length_b){
+void ubi512_lastBlock(ubi512_ctx_t* ctx, const void* block, uint16_t length_b){
        threefish512_ctx_t tfctx;
        while(length_b>UBI512_BLOCKSIZE){
                ubi512_nextBlock(ctx, block);
@@ -65,9 +65,12 @@ void ubi512_lastBlock(ubi512_ctx_t* ctx, void* block, uint16_t length_b){
                ctx->g[(length_b+7)/8-1] |= 0x80>>(length_b&7);
        threefish512_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 ubi512_ctx2hash(void* dest, ubi512_ctx_t* ctx){
+void ubi512_ctx2hash(void* dest, const ubi512_ctx_t* ctx){
        memcpy(dest, ctx->g, UBI512_BLOCKSIZE_B);
 }