mbedtls/include/polarssl/des.h
2009-01-03 21:22:43 +00:00

150 lines
3.8 KiB
C

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