aes.h File Reference


Detailed Description

Copyright (C) 2006-2009, Paul Bakker <polarssl_maintainer at polarssl.org> All rights reserved.

Joined copyright on original XySSL code with: Christophe Devine

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.

Definition in file aes.h.

Go to the source code of this file.

Data Structures

struct  aes_context
 AES context structure. More...

Defines

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

Functions

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


Define Documentation

#define AES_DECRYPT   0

Definition at line 27 of file aes.h.

#define AES_ENCRYPT   1

Definition at line 26 of file aes.h.

#define POLARSSL_ERR_AES_INVALID_KEY_LENGTH   -0x0800

Definition at line 29 of file aes.h.


Function Documentation

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

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

Parameters:
ctx AES context
mode AES_ENCRYPT or AES_DECRYPT
length length of the input data
iv initialization vector (updated after use)
input buffer holding the input data
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 
)

AES-CFB128 buffer encryption/decryption.

Parameters:
ctx AES context
mode AES_ENCRYPT or AES_DECRYPT
length length of the input data
iv_off offset in IV (updated after use)
iv initialization vector (updated after use)
input buffer holding the input data
output buffer holding the output data

void aes_crypt_ecb ( aes_context ctx,
int  mode,
unsigned char  input[16],
unsigned char  output[16] 
)

AES-ECB block encryption/decryption.

Parameters:
ctx AES context
mode AES_ENCRYPT or AES_DECRYPT
input 16-byte input block
output 16-byte output block

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,
unsigned char *  key,
int  keysize 
)

AES key schedule (decryption).

Parameters:
ctx AES context to be initialized
key decryption key
keysize must be 128, 192 or 256
Returns:
0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH

int aes_setkey_enc ( aes_context ctx,
unsigned char *  key,
int  keysize 
)

AES key schedule (encryption).

Parameters:
ctx AES context to be initialized
key encryption key
keysize must be 128, 192 or 256
Returns:
0 if successful, or POLARSSL_ERR_AES_INVALID_KEY_LENGTH


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