}
void bmw_large_lastBlock(bmw_large_ctx_t* ctx, const void* block, uint16_t length_b){
- uint8_t buffer[128];
+ union {
+ uint8_t v8[128];
+ uint64_t v64[ 16];
+ } buffer;
while(length_b >= BMW_LARGE_BLOCKSIZE){
bmw_large_nextBlock(ctx, block);
length_b -= BMW_LARGE_BLOCKSIZE;
block = (uint8_t*)block + BMW_LARGE_BLOCKSIZE_B;
}
- memset(buffer, 0, 128);
- memcpy(buffer, block, (length_b+7)/8);
- buffer[length_b>>3] |= 0x80 >> (length_b&0x07);
+ memset(buffer.v8, 0, 128);
+ memcpy(buffer.v8, block, (length_b+7)/8);
+ buffer.v8[length_b>>3] |= 0x80 >> (length_b&0x07);
if(length_b+1>128*8-64){
- bmw_large_nextBlock(ctx, buffer);
- memset(buffer, 0, 128-8);
+ bmw_large_nextBlock(ctx, buffer.v8);
+ memset(buffer.v8, 0, 128-8);
ctx->counter -= 1;
}
- *((uint64_t*)&(buffer[128-8])) = (uint64_t)(ctx->counter*1024LL)+(uint64_t)length_b;
- bmw_large_nextBlock(ctx, buffer);
+ buffer.v64[15] = (uint64_t)(ctx->counter*1024LL)+(uint64_t)length_b;
+ bmw_large_nextBlock(ctx, buffer.v8);
#if TWEAK
uint8_t i;
uint64_t q[32];
- memset(buffer, 0xaa, 128);
+ memset(buffer.v8, 0xaa, 128);
for(i=0; i<16; ++i){
- buffer[8*i] = i + 0xa0;
+ buffer.v8[8*i] = i + 0xa0;
}
- bmw_large_f0(q, (uint64_t*)buffer, ctx->h);
- bmw_large_f1(q, ctx->h, (uint64_t*)buffer);
- bmw_large_f2((uint64_t*)buffer, q, ctx->h);
- memcpy(ctx->h, buffer, 128);
+ bmw_large_f0(q, buffer.v64, ctx->h);
+ bmw_large_f1(q, ctx->h, buffer.v64);
+ bmw_large_f2(buffer.v64, q, ctx->h);
+ memcpy(ctx->h, buffer.v8, 128);
#endif
}