des的C语言版本，带自检程序。ecb模式实现。,des of the C language version, with self-test procedures

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HashLib，在涉及到加密解密算法的时候，都使用到加密库，这里提供的算法常用的经典算法，源码有CB和Delphi-HashLib, when it comes to encryption and decryption algorithms, it also uses to encrypt the database, the algorithm used here are classic algorithms, and Delphi source code with CB