aes_ctr_setkey
int aes_ctr_setkey(void *, u_int8_t *, int);
error = aes_ctr_setkey(&ctx, (u_int8_t *)key, klen);
aes_ctr_setkey,
aes_ctr_setkey,
int aes_ctr_setkey(void *, u_int8_t *, int);