文件名称：3DES标准算法库方便实现加解密
文件大小：5KB
文件格式：RAR
更新时间：2014-06-22 08:19:19
DES
#ifdef __cplusplus extern "C" { #endif /** * \brief DES context structure */ typedef struct { unsigned long esk[32]; /*!< DES encryption subkeys */ unsigned long dsk[32]; /*!< DES decryption subkeys */ } des_context; /** * \brief Triple-DES context structure */ typedef struct { unsigned long esk[96]; /*!< Triple-DES encryption subkeys */ unsigned long dsk[96]; /*!< Triple-DES decryption subkeys */ } des3_context; /** * \brief DES key schedule (56-bit) * * \param ctx DES context to be initialized * \param key 8-byte secret key */ void my_des_set_key( des_context *ctx, unsigned char key[8] ); /** * \brief DES block encryption (ECB mode) * * \param ctx DES context * \param input plaintext block * \param output ciphertext block */ void des_encrypt( des_context *ctx, unsigned char input[8], unsigned char output[8] ); /** * \brief DES block decryption (ECB mode) * * \param ctx DES context * \param input ciphertext block * \param output plaintext block */ void des_decrypt( des_context *ctx, unsigned char input[8], unsigned char output[8] ); /** * \brief DES-CBC buffer encryption * * \param ctx DES context * \param iv initialization vector (modified after use) * \param input buffer holding the plaintext * \param output buffer holding the ciphertext * \param len length of the data to be encrypted */ void my_des_cbc_encrypt( des_context *ctx, unsigned char iv[8], unsigned char *input, unsigned char *output, int len ); /** * \brief DES-CBC buffer decryption * * \param ctx DES context * \param iv initialization vector (modified after use) * \param input buffer holding the ciphertext * \param output buffer holding the plaintext * \param len length of the data to be decrypted */ void my_des_cbc_decrypt( des_context *ctx, unsigned char iv[8], unsigned char *input, unsigned char *output, int len ); /** * \brief Triple-DES key schedule (112-bit) * * \param ctx 3DES context to be initialized * \param key 16-byte secret key */ void des3_set_2keys( des3_context *ctx, unsigned char key[16] ); /** * \brief Triple-DES key schedule (168-bit) * * \param ctx 3DES context to be initialized * \param key 24-byte secret key */ void des3_set_3keys( des3_context *ctx, unsigned char key[24] ); /** * \brief Triple-DES block encryption (ECB mode) * * \param ctx 3DES context * \param input plaintext block * \param output ciphertext block */ void des3_encrypt( des3_context *ctx, unsigned char input[8], unsigned char output[8] ); /** * \brief Triple-DES block decryption (ECB mode) * * \param ctx 3DES context * \param input ciphertext block * \param output plaintext block */ void des3_decrypt( des3_context *ctx, unsigned char input[8], unsigned char output[8] ); /** * \brief 3DES-CBC buffer encryption * * \param ctx 3DES context * \param iv initialization vector (modified after use) * \param input buffer holding the plaintext * \param output buffer holding the ciphertext * \param len length of the data to be encrypted */ void des3_cbc_encrypt( des3_context *ctx, unsigned char iv[8], unsigned char *input, unsigned char *output, int len ); /** * \brief 3DES-CBC buffer decryption * * \param ctx 3DES context * \param iv initialization vector (modified after use) * \param input buffer holding the ciphertext * \param output buffer holding the plaintext * \param len length of the data to be decrypted */ void des3_cbc_decrypt( des3_context *ctx, unsigned char iv[8], unsigned char *input, unsigned char *output, int len ); /* * \brief Checkup routine * * \return 0 if successful, or 1 if the test failed */ int des_self_test( void ); #ifdef __cplusplus } #endif #endif /* des.h */
【文件预览】：
3DES算法库
----des3.c(24KB)
----des3.h(4KB)