aes-internal.c File Reference

AES (Rijndael) cipher. More...

#include "includes.h"
#include "common.h"
#include "crypto.h"
#include "aes_i.h"

Functions
int	rijndaelKeySetupEnc (u32 rk[], const u8 cipherKey[], int keyBits)
	Expand the cipher key into the encryption key schedule. More...

Variables
const u32	Te0 [256]
const u32	Td0 [256]
const u8	Td4s [256]
const u8	rcons []

Detailed Description

AES (Rijndael) cipher.

Modifications to public domain implementation:

• cleanup
• use C pre-processor to make it easier to change S table access
• added option (AES_SMALL_TABLES) for reducing code size by about 8 kB at cost of reduced throughput (quite small difference on Pentium 4, 10-25% when using -O1 or -O2 optimization)

Function Documentation

int rijndaelKeySetupEnc	(	u32	rk[],
		const u8	cipherKey[],
		int	keyBits
	)

Expand the cipher key into the encryption key schedule.

Parameters

return

the number of rounds for the given cipher key size.

Variable Documentation

const u8 rcons[]

Initial value:

= {
        0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1B, 0x36
        
}