grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, &c->partial_buffer, &c->c.buffer);
for (i = 0; i < lasted; i++) {
currentOutputBlock->b[i] = c->partial_buffer.b[i] ^ currentInputBlock->b[i];
}
grasshopper_encrypt_block(&c->c.encrypt_round_keys, &c->iv_buffer, &c->partial_buffer, &c->c.buffer);
for (i = 0; i < lasted; i++) {
currentOutputBlock->b[i] = c->partial_buffer.b[i] ^ currentInputBlock->b[i];
}