some fixes, mainly at rsaes-pkcs1v15

[avr-crypto-lib.git] / md5 / md5.c

diff --git a/md5/md5.c b/md5/md5.c
index 003699e5ef4ae65486bece16d9cdfbe21a4cca2b..3feddd6881b17d2e80b7c33b7ce33951435e7161 100644 (file)
--- a/md5/md5.c
+++ b/md5/md5.c
@@ -139,32 +139,35 @@ void md5_nextBlock(md5_ctx_t *state, const void* block){
 
 void md5_lastBlock(md5_ctx_t *state, const void* block, uint16_t length_b){
        uint16_t l;
-       uint8_t b[64];
+       union {
+               uint8_t   v8[64];
+               uint64_t v64[ 8];
+       } buffer;
        while (length_b >= 512){
                md5_nextBlock(state, block);
                length_b -= 512;
                block = ((uint8_t*)block) + 512/8;
        }
-       memset(b, 0, 64);
-       memcpy(b, block, length_b/8);
+       memset(buffer.v8, 0, 64);
+       memcpy(buffer.v8, block, length_b/8);
        /* insert padding one */
        l=length_b/8;
        if(length_b%8){
                uint8_t t;
                t = ((uint8_t*)block)[l];
                t |= (0x80>>(length_b%8));
-               b[l]=t;
+               buffer.v8[l]=t;
        }else{
-               b[l]=0x80;
+               buffer.v8[l]=0x80;
        }
        /* insert length value */
        if(l+sizeof(uint64_t) >= 512/8){
-               md5_nextBlock(state, b);
+               md5_nextBlock(state, buffer.v8);
                state->counter--;
-               memset(b, 0, 64-8);
+               memset(buffer.v8, 0, 64-8);
        }
-       *((uint64_t*)&b[64-sizeof(uint64_t)]) = (state->counter * 512) + length_b;
-       md5_nextBlock(state, b);
+       buffer.v64[7] = (state->counter * 512) + length_b;
+       md5_nextBlock(state, buffer.v8);
 }
 
 void md5_ctx2hash(md5_hash_t* dest, const md5_ctx_t* state){