来自3GPP国际规范 sim卡鉴权 3GPP 鉴权的逻辑代码。 包括f1, f1*, f2, f3, f4, f5 和 f5*函数。 Algorithm f1 * Computes network authentication code MAC-A from key K, random * challenge RAND, sequence number SQN and authentication management * field AMF. Algorithms f2-f5 * Takes key K and random challenge RAND,