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){