term% cat index.txt AES(2) System Calls Manual AES(2)
NAME
setupAESstate, aesCBCencrypt, aesCBCdecrypt, setupAESXCBCstate, aesX‐
CBCmac - advanced encryption standard (rijndael)
SYNOPSIS
#include <u.h>
#include <libc.h>
#include <mp.h>
#include <libsec.h>
void aes_encrypt(ulong rk[], int Nr, uchar pt[16], uchar ct[16]);
void aes_decrypt(ulong rk[], int Nr, uchar ct[16], uchar pt[16]);
void setupAESstate(AESstate *s, uchar key[], int keybytes, uchar *ivec)
void aesCBCencrypt(uchar *p, int len, AESstate *s)
void aesCBCdecrypt(uchar *p, int len, AESstate *s)
void setupAESXCBCstate(AESstate *s)
void aesXCBCmac(uchar *p, int len, AESstate *s)
DESCRIPTION
AES (a.k.a. Rijndael) has replaced DES as the preferred block cipher.
Aes_encrypt and aes_decrypt are the block ciphers, corresponding to
des(2)'s block_cipher. SetupAESstate, aesCBCencrypt, and aesCBCdecrypt
implement cipher-block-chaining encryption. setupAESXCBCstate and
aesXCBCmac implement AES XCBC message authentication, per RFC 3566.
All ciphering is performed in place. Keybytes should be 16, 24, or 32.
The initialization vector ivec of AESbsize bytes should be random
enough to be unlikely to be reused but does not need to be cryptograph‐
ically strongly unpredictable.
SOURCE
/sys/src/libsec
SEE ALSO
aescbc in secstore(1), mp(2), blowfish(2), des(2), dsa(2), elgamal(2),
rc4(2), rsa(2), sechash(2), prime(2), rand(2)
http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
BUGS
The functions aes_encrypt, aes_decrypt, setupAESXCBCstate, and aesXCBC‐
mac have not yet been verified by running test vectors through them.
AES(2)