Atmel Software Framework

aes.h File Reference

Copyright (C) 2006-2010, Brainspark B.V.

This file is part of PolarSSL (http://www.polarssl.org) Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>

All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Data Structures

struct  aes_context
 AES context structure. More...
 

Macros

#define AES_DECRYPT   0
 
#define AES_ENCRYPT   1
 
#define POLARSSL_ERR_AES_INVALID_INPUT_LENGTH   -0x0810
 
#define POLARSSL_ERR_AES_INVALID_KEY_LENGTH   -0x0800
 

Functions

int aes_crypt_cbc (aes_context *ctx, int mode, int length, unsigned char iv[16], const unsigned char *input, unsigned char *output)
 AES-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes) More...
 
int aes_crypt_cfb128 (aes_context *ctx, int mode, int length, int *iv_off, unsigned char iv[16], const unsigned char *input, unsigned char *output)
 AES-CFB128 buffer encryption/decryption. More...
 
int aes_crypt_ecb (aes_context *ctx, int mode, const unsigned char input[16], unsigned char output[16])
 AES-ECB block encryption/decryption. More...
 
int aes_self_test (int verbose)
 Checkup routine. More...
 
int aes_setkey_dec (aes_context *ctx, const unsigned char *key, int keysize)
 AES key schedule (decryption) More...
 
int aes_setkey_enc (aes_context *ctx, const unsigned char *key, int keysize)
 AES key schedule (encryption) More...
 

#define AES_DECRYPT   0
#define AES_ENCRYPT   1

Referenced by main().

#define POLARSSL_ERR_AES_INVALID_INPUT_LENGTH   -0x0810
#define POLARSSL_ERR_AES_INVALID_KEY_LENGTH   -0x0800

int aes_crypt_cbc ( aes_context ctx,
int  mode,
int  length,
unsigned char  iv[16],
const unsigned char *  input,
unsigned char *  output 
)

AES-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes)

Parameters
ctxAES context
modeAES_ENCRYPT or AES_DECRYPT
lengthlength of the input data
ivinitialization vector (updated after use)
inputbuffer holding the input data
outputbuffer holding the output data
Returns
0 if successful, or POLARSSL_ERR_AES_INVALID_INPUT_LENGTH

Referenced by main().

int aes_crypt_cfb128 ( aes_context ctx,
int  mode,
int  length,
int *  iv_off,
unsigned char  iv[16],
const unsigned char *  input,
unsigned char *  output 
)

AES-CFB128 buffer encryption/decryption.

Parameters
ctxAES context
modeAES_ENCRYPT or AES_DECRYPT
lengthlength of the input data
iv_offoffset in IV (updated after use)
ivinitialization vector (updated after use)
inputbuffer holding the input data
outputbuffer holding the output data
Returns
0 if successful
int aes_crypt_ecb ( aes_context ctx,
int  mode,
const unsigned char  input[16],
unsigned char  output[16] 
)

AES-ECB block encryption/decryption.

Parameters
ctxAES context
modeAES_ENCRYPT or AES_DECRYPT
input16-byte input block
output16-byte output block
Returns
0 if successful
int aes_self_test ( int  verbose)

Checkup routine.

Returns
0 if successful, or 1 if the test failed

Referenced by main().

int aes_setkey_dec ( aes_context ctx,
const unsigned char *  key,
int  keysize 
)

AES key schedule (decryption)

Parameters
ctxAES context to be initialized
keydecryption key
keysizemust be 128, 192 or 256
Returns
0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH
int aes_setkey_enc ( aes_context ctx,
const unsigned char *  key,
int  keysize 
)

AES key schedule (encryption)

Parameters
ctxAES context to be initialized
keyencryption key
keysizemust be 128, 192 or 256
Returns
0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH

Referenced by main().