AES(2)AES(2)NAME
setupAESstate, aesCBCencrypt, aesCBCdecrypt, aesCTRencrypt, aesCTRde‐
crypt, setupAESXCBCstate, aesXCBCmac - 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 aesCTRencrypt(uchar *p, int len, AESstate *s)
void aesCTRdecrypt(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. AesCTRencrypt and aesC‐
TRdecrypt implement counter mode, per RFC 3686; they are identical
operations. setupAESXCBCstate and aesXCBCmac implement AES XCBC mes‐
sage 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 cryptographically strongly unpre‐
dictable.
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, aesCTRencrypt, aesCTRdecrypt,
setupAESXCBCstate, and aesXCBCmac have not yet been verified by running
test vectors through them.
AES(2)