DES算法,头文件自己改写过，请指教 #ifndef __DES_H #define __DES_H class DES { public: // Encrypt/decrypt the data in "data", according to the "key". // Caller is responsible for confirming the buffer size of "data" // points to is 8*"blocks" bytes. // The data encrypted/decrypted is stored in data. // The return code is 1:success, other:failed. int encrypt ( char key[8], char* data, int blocks = 1 ); int decrypt ( char key[8], char* data, int blocks = 1 ); // Encrypt/decrypt any size data,according to a special method. // Before calling yencrypt, copy data to a new buffer with size // calculated by extend. int yencrypt ( char key[8], char* data, int size ); int ydecrypt ( char key[8], char* in, int blocks, int* size = 0 ); int extend ( int size ) { return (size/8+1)*8; }; private: void des(unsigned char* in, unsigned char* out, int blocks); void des_block(unsigned char* in, unsigned char* out); private: unsigned long KnL[32]; enum Mode { ENCRYPT, DECRYPT }; void deskey(unsigned char key[8], Mode md); void usekey(unsigned long *); void cookey(unsigned long *); private: void scrunch(unsigned char *, unsigned long *); void unscrun(unsigned long *, unsigned char *); void desfunc(unsigned long *, unsigned long *); private: static unsigned char Df_Key[24]; static unsigned short bytebit[8]; static unsigned long bigbyte[24]; static unsigned char pc1[56]; static unsigned char totrot[16]; static unsigned char pc2[48]; static unsigned long SP1[64]; static unsigned long SP2[64]; static unsigned long SP3[64]; static unsigned long SP4[64]; static unsigned long SP5[64]; static unsigned long SP6[64]; static unsigned long SP7[64]; static unsigned long SP8[64]; }; #endif 中华技术网整理发布 http://www.asfocus.com http://www.netqu.com
