aes-internal.c File Reference

AES (Rijndael) cipher. More...

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

Functions
void	rijndaelKeySetupEnc (u32 rk[], const u8 cipherKey[])
	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:

• support only 128-bit keys
• 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

rijndaelKeySetupEnc()

void rijndaelKeySetupEnc	(	u32	rk[],
		const u8	cipherKey[]
	)

Expand the cipher key into the encryption key schedule.

Returns

the number of rounds for the given cipher key size.

References GETU32, RCON, TE414, TE421, TE432, and TE443.

Referenced by aes_encrypt_init().

Variable Documentation

rcons

const u8 rcons[]

Initial value:

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

Td0

const u32 Td0[256]

Td4s

const u8 Td4s[256]

Te0

const u32 Te0[256]