| /** |
| * \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 */ |