void sha256_lastBlock(sha256_ctx_t *state, void* block, uint16_t length);
void sha256_ctx2hash(sha256_hash_t *dest, sha256_ctx_t *state);
void sha256_lastBlock(sha256_ctx_t *state, void* block, uint16_t length);
void sha256_ctx2hash(sha256_hash_t *dest, sha256_ctx_t *state);