150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
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/**
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* \file des.h
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*/
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#ifndef XYSSL_DES_H
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#define XYSSL_DES_H
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#define DES_ENCRYPT 1
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#define DES_DECRYPT 0
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/**
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* \brief DES context structure
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*/
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typedef struct
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{
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int mode; /*!< encrypt/decrypt */
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unsigned long sk[32]; /*!< DES subkeys */
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}
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des_context;
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/**
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* \brief Triple-DES context structure
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*/
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typedef struct
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{
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int mode; /*!< encrypt/decrypt */
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unsigned long sk[96]; /*!< 3DES subkeys */
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}
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des3_context;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief DES key schedule (56-bit, encryption)
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*
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* \param ctx DES context to be initialized
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* \param key 8-byte secret key
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*/
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void des_setkey_enc( des_context *ctx, unsigned char key[8] );
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/**
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* \brief DES key schedule (56-bit, decryption)
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*
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* \param ctx DES context to be initialized
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* \param key 8-byte secret key
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*/
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void des_setkey_dec( des_context *ctx, unsigned char key[8] );
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/**
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* \brief Triple-DES key schedule (112-bit, encryption)
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*
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* \param ctx 3DES context to be initialized
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* \param key 16-byte secret key
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*/
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void des3_set2key_enc( des3_context *ctx, unsigned char key[16] );
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/**
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* \brief Triple-DES key schedule (112-bit, decryption)
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*
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* \param ctx 3DES context to be initialized
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* \param key 16-byte secret key
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*/
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void des3_set2key_dec( des3_context *ctx, unsigned char key[16] );
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/**
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* \brief Triple-DES key schedule (168-bit, encryption)
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*
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* \param ctx 3DES context to be initialized
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* \param key 24-byte secret key
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*/
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void des3_set3key_enc( des3_context *ctx, unsigned char key[24] );
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/**
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* \brief Triple-DES key schedule (168-bit, decryption)
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*
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* \param ctx 3DES context to be initialized
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* \param key 24-byte secret key
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*/
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void des3_set3key_dec( des3_context *ctx, unsigned char key[24] );
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/**
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* \brief DES-ECB block encryption/decryption
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*
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* \param ctx DES context
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* \param input 64-bit input block
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* \param output 64-bit output block
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*/
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void des_crypt_ecb( des_context *ctx,
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unsigned char input[8],
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unsigned char output[8] );
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/**
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* \brief DES-CBC buffer encryption/decryption
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*
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* \param ctx DES context
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* \param mode DES_ENCRYPT or DES_DECRYPT
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* \param length length of the input data
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* \param iv initialization vector (updated after use)
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* \param input buffer holding the input data
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* \param output buffer holding the output data
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*/
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void des_crypt_cbc( des_context *ctx,
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int mode,
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int length,
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unsigned char iv[8],
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unsigned char *input,
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unsigned char *output );
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/**
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* \brief 3DES-ECB block encryption/decryption
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*
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* \param ctx 3DES context
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* \param input 64-bit input block
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* \param output 64-bit output block
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*/
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void des3_crypt_ecb( des3_context *ctx,
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unsigned char input[8],
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unsigned char output[8] );
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/**
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* \brief 3DES-CBC buffer encryption/decryption
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*
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* \param ctx 3DES context
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* \param mode DES_ENCRYPT or DES_DECRYPT
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* \param length length of the input data
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* \param iv initialization vector (updated after use)
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* \param input buffer holding the input data
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* \param output buffer holding the output data
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*/
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void des3_crypt_cbc( des3_context *ctx,
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int mode,
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int length,
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unsigned char iv[8],
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unsigned char *input,
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unsigned char *output );
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/*
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int des_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* des.h */
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