void blake_small_lastBlock(blake_small_ctx_t* ctx, const void* msg, uint16_t length_b){
while(length_b>=BLAKE_SMALL_BLOCKSIZE){
blake_small_nextBlock(ctx, msg);
msg = (uint8_t*)msg + BLAKE_SMALL_BLOCKSIZE_B;
length_b -= BLAKE_SMALL_BLOCKSIZE;
}
uint8_t buffer[64];
uint32_t v[16];
union {
uint64_t v64;
uint32_t v32[2];
}ctr;
ctr.v64 = ctx->counter*512+length_b;
memset(buffer, 0, 64);
memcpy(buffer, msg, (length_b+7)/8);
buffer[length_b/8] |= 0x80 >> (length_b&0x7);
blake_small_changeendian(buffer, buffer);
blake_small_expand(v, ctx);
if(length_b>512-64-2){
v[12] ^= ctr.v32[0];
v[13] ^= ctr.v32[0];
v[14] ^= ctr.v32[1];
v[15] ^= ctr.v32[1];
blake_small_compress(v, buffer);
blake_small_collapse(ctx, v);
memset(buffer, 0, 64-8);
blake_small_expand(v, ctx);
}else{
if(length_b){
v[12] ^= ctr.v32[0];
v[13] ^= ctr.v32[0];
v[14] ^= ctr.v32[1];
v[15] ^= ctr.v32[1];
}
}
if(ctx->appendone)
buffer[64-8-4] |= 0x01;
*((uint32_t*)(&(buffer[64-8]))) = ctr.v32[1];
*((uint32_t*)(&(buffer[64-4]))) = ctr.v32[0];
blake_small_compress(v, buffer);
blake_small_collapse(ctx, v);
}
void blake_small_nextBlock(blake_small_ctx_t *ctx, const void *msg)
{
uint32_t v[16];
uint32_t m[16];
union {
uint64_t v64;
uint32_t v32[2];
} ctr;
blake_small_expand(v, ctx);
ctx->counter++;
ctr.v64 = ctx->counter * 512;
v[12] ^= ctr.v32[0];
v[13] ^= ctr.v32[0];
v[14] ^= ctr.v32[1];
v[15] ^= ctr.v32[1];
blake_small_changeendian(m, msg);
blake_small_compress(v, m);
blake_small_collapse(ctx, v);
}
