Data Structures | Functions | Variables

include/beecrypt/aes.h File Reference

AES block cipher, as specified by NIST FIPS 197. More...

#include "beecrypt/beecrypt.h"
#include "beecrypt/aesopt.h"
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Data Structures

struct  aesParam
 Holds all the parameters necessary for the AES cipher. More...

Functions

int aesSetup (aesParam *ap, const byte *key, size_t keybits, cipherOperation op)
 This function performs the cipher's key expansion.
int aesSetIV (aesParam *ap, const byte *iv)
 This function sets the Initialization Vector.
int aesSetCTR (aesParam *ap, const byte *nivz, size_t counter)
 This function sets the CTR mode counter.
int aesEncrypt (aesParam *ap, uint32_t *dst, const uint32_t *src)
 This function performs the raw AES encryption; it encrypts one block of 128 bits.
int aesDecrypt (aesParam *ap, uint32_t *dst, const uint32_t *src)
 This function performs the raw AES decryption; it decrypts one block of 128 bits.
uint32_t * aesFeedback (aesParam *ap)

Variables

const blockCipher aes
 Holds the full API description of the AES algorithm.

Detailed Description

AES block cipher, as specified by NIST FIPS 197.

Author:
Bob Deblier <bob.deblier@telenet.be>

Function Documentation

aesDecrypt ( aesParam ap,
uint32_t *  dst,
const uint32_t *  src 
)

This function performs the raw AES decryption; it decrypts one block of 128 bits.

Parameters:
ap The cipher's parameter block.
dst The cleartext; should be aligned on 32-bit boundary.
src The ciphertext; should be aligned on 32-bit boundary.
Return values:
0 on success.
aesEncrypt ( aesParam ap,
uint32_t *  dst,
const uint32_t *  src 
)

This function performs the raw AES encryption; it encrypts one block of 128 bits.

Parameters:
ap The cipher's parameter block.
dst The ciphertext; should be aligned on 32-bit boundary.
src The cleartext; should be aligned on 32-bit boundary.
Return values:
0 on success.
uint32_t* aesFeedback ( aesParam ap  ) 
int aesSetCTR ( aesParam ap,
const byte nivz,
size_t  counter 
)

This function sets the CTR mode counter.

Note:
This function is only useful in CTR modes.
Parameters:
ap The cipher's parameter block.
nivz The concatenation of Nonce, IV, and padding Zeroes.
counter The counter.
Return values:
0 on success.
int aesSetIV ( aesParam ap,
const byte iv 
)

This function sets the Initialization Vector.

Note:
This function is only useful in block chaining or feedback modes.
Parameters:
ap The cipher's parameter block.
iv The initialization vector; may be null.
Return values:
0 on success.
int aesSetup ( aesParam ap,
const byte key,
size_t  keybits,
cipherOperation  op 
)

This function performs the cipher's key expansion.

Parameters:
ap The cipher's parameter block.
key The key value.
keybits The number of bits in the key; legal values are: 128, 192 and 256.
op ENCRYPT or DECRYPT.
Return values:
0 on success.
-1 on failure.

Variable Documentation

aes

Holds the full API description of the AES algorithm.