设置RSA结构中的method，当用户实现了一个RSA_METHOD时，调用此函数来设置，使RSA运算采用用户的方法。-very good you could make it,please hit it,you have no problem ,Are you ok? maybe we could mak it later.

本程序实现了RSA密钥的产生，可以产生多个密钥，值得学习-This procedure implements the RSA key generation, can generate multiple keys, it is worth learning

Meet in the middle (not ok)