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

104 lines
2.7 KiB
C

/**
* \file aes.h
*/
#ifndef XYSSL_AES_H
#define XYSSL_AES_H
#define AES_ENCRYPT 1
#define AES_DECRYPT 0
/**
* \brief AES context structure
*/
typedef struct
{
int nr; /*!< number of rounds */
unsigned long *rk; /*!< AES round keys */
unsigned long buf[68]; /*!< unaligned data */
}
aes_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief AES key schedule (encryption)
*
* \param ctx AES context to be initialized
* \param key encryption key
* \param keysize must be 128, 192 or 256
*/
void aes_setkey_enc( aes_context *ctx, unsigned char *key, int keysize );
/**
* \brief AES key schedule (decryption)
*
* \param ctx AES context to be initialized
* \param key decryption key
* \param keysize must be 128, 192 or 256
*/
void aes_setkey_dec( aes_context *ctx, unsigned char *key, int keysize );
/**
* \brief AES-ECB block encryption/decryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param input 16-byte input block
* \param output 16-byte output block
*/
void aes_crypt_ecb( aes_context *ctx,
int mode,
unsigned char input[16],
unsigned char output[16] );
/**
* \brief AES-CBC buffer encryption/decryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_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 aes_crypt_cbc( aes_context *ctx,
int mode,
int length,
unsigned char iv[16],
unsigned char *input,
unsigned char *output );
/**
* \brief AES-CFB128 buffer encryption/decryption
*
* \param ctx AES context
* \param mode AES_ENCRYPT or AES_DECRYPT
* \param length length of the input data
* \param iv_off offset in IV (updated after use)
* \param iv initialization vector (updated after use)
* \param input buffer holding the input data
* \param output buffer holding the output data
*/
void aes_crypt_cfb128( aes_context *ctx,
int mode,
int length,
int *iv_off,
unsigned char iv[16],
unsigned char *input,
unsigned char *output );
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int aes_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* aes.h */