cardkey          1178 dev/ic/rln.c   rln_crypt(userkey, cardkey)
cardkey          1180 dev/ic/rln.c   	u_int8_t *cardkey;	/* 20 bits (3 bytes) */
cardkey          1218 dev/ic/rln.c           cardkey[0] = (key >> 16) & 0xff;
cardkey          1219 dev/ic/rln.c           cardkey[1] = (key >> 8) & 0xff;
cardkey          1220 dev/ic/rln.c           cardkey[2] = key & 0xff;
cardkey          1222 dev/ic/rln.c   	cardkey[0] |= 0x03; 	/* Restrict key space by 2 bits. */