#include "tomcrypt.h"
#ifdef NOEKEON
const
struct
ltc_cipher_descriptor noekeon_desc =
{
"noekeon"
,
16,
16, 16, 16, 16,
&noekeon_setup,
&noekeon_ecb_encrypt,
&noekeon_ecb_decrypt,
&noekeon_test,
&noekeon_done,
&noekeon_keysize,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
static
const
ulong32 RC[] = {
0x00000080UL, 0x0000001bUL, 0x00000036UL, 0x0000006cUL,
0x000000d8UL, 0x000000abUL, 0x0000004dUL, 0x0000009aUL,
0x0000002fUL, 0x0000005eUL, 0x000000bcUL, 0x00000063UL,
0x000000c6UL, 0x00000097UL, 0x00000035UL, 0x0000006aUL,
0x000000d4UL
};
#define kTHETA(a, b, c, d) \
temp = a^c; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \
b ^= temp; d ^= temp; \
temp = b^d; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \
a ^= temp; c ^= temp;
#define THETA(k, a, b, c, d) \
temp = a^c; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \
b ^= temp ^ k[1]; d ^= temp ^ k[3]; \
temp = b^d; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \
a ^= temp ^ k[0]; c ^= temp ^ k[2];
#define GAMMA(a, b, c, d) \
b ^= ~(d|c); \
a ^= c&b; \
temp = d; d = a; a = temp;\
c ^= a ^ b ^ d; \
b ^= ~(d|c); \
a ^= c&b;
#define PI1(a, b, c, d) \
a = ROLc(a, 1); c = ROLc(c, 5); d = ROLc(d, 2);
#define PI2(a, b, c, d) \
a = RORc(a, 1); c = RORc(c, 5); d = RORc(d, 2);
int
noekeon_setup(
const
unsigned
char
*key,
int
keylen,
int
num_rounds, symmetric_key *skey)
{
ulong32 temp;
LTC_ARGCHK(key != NULL);
LTC_ARGCHK(skey != NULL);
if
(keylen != 16) {
return
CRYPT_INVALID_KEYSIZE;
}
if
(num_rounds != 16 && num_rounds != 0) {
return
CRYPT_INVALID_ROUNDS;
}
LOAD32H(skey->noekeon.K[0],&key[0]);
LOAD32H(skey->noekeon.K[1],&key[4]);
LOAD32H(skey->noekeon.K[2],&key[8]);
LOAD32H(skey->noekeon.K[3],&key[12]);
LOAD32H(skey->noekeon.dK[0],&key[0]);
LOAD32H(skey->noekeon.dK[1],&key[4]);
LOAD32H(skey->noekeon.dK[2],&key[8]);
LOAD32H(skey->noekeon.dK[3],&key[12]);
kTHETA(skey->noekeon.dK[0], skey->noekeon.dK[1], skey->noekeon.dK[2], skey->noekeon.dK[3]);
return
CRYPT_OK;
}
#ifdef LTC_CLEAN_STACK
static
int
_noekeon_ecb_encrypt(
const
unsigned
char
*pt, unsigned
char
*ct, symmetric_key *skey)
#else
int
noekeon_ecb_encrypt(
const
unsigned
char
*pt, unsigned
char
*ct, symmetric_key *skey)
#endif
{
ulong32 a,b,c,d,temp;
int
r;
LTC_ARGCHK(skey != NULL);
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
LOAD32H(a,&pt[0]); LOAD32H(b,&pt[4]);
LOAD32H(c,&pt[8]); LOAD32H(d,&pt[12]);
#define ROUND(i) \
a ^= RC[i]; \
THETA(skey->noekeon.K, a,b,c,d); \
PI1(a,b,c,d); \
GAMMA(a,b,c,d); \
PI2(a,b,c,d);
for
(r = 0; r < 16; ++r) {
ROUND(r);
}
#undef ROUND
a ^= RC[16];
THETA(skey->noekeon.K, a, b, c, d);
STORE32H(a,&ct[0]); STORE32H(b,&ct[4]);
STORE32H(c,&ct[8]); STORE32H(d,&ct[12]);
return
CRYPT_OK;
}
#ifdef LTC_CLEAN_STACK
int
noekeon_ecb_encrypt(
const
unsigned
char
*pt, unsigned
char
*ct, symmetric_key *skey)
{
int
err = _noekeon_ecb_encrypt(pt, ct, skey);
burn_stack(
sizeof
(ulong32) * 5 +
sizeof
(
int
));
return
CRYPT_OK;
}
#endif
#ifdef LTC_CLEAN_STACK
static
int
_noekeon_ecb_decrypt(
const
unsigned
char
*ct, unsigned
char
*pt, symmetric_key *skey)
#else
int
noekeon_ecb_decrypt(
const
unsigned
char
*ct, unsigned
char
*pt, symmetric_key *skey)
#endif
{
ulong32 a,b,c,d, temp;
int
r;
LTC_ARGCHK(skey != NULL);
LTC_ARGCHK(pt != NULL);
LTC_ARGCHK(ct != NULL);
LOAD32H(a,&ct[0]); LOAD32H(b,&ct[4]);
LOAD32H(c,&ct[8]); LOAD32H(d,&ct[12]);
#define ROUND(i) \
THETA(skey->noekeon.dK, a,b,c,d); \
a ^= RC[i]; \
PI1(a,b,c,d); \
GAMMA(a,b,c,d); \
PI2(a,b,c,d);
for
(r = 16; r > 0; --r) {
ROUND(r);
}
#undef ROUND
THETA(skey->noekeon.dK, a,b,c,d);
a ^= RC[0];
STORE32H(a,&pt[0]); STORE32H(b, &pt[4]);
STORE32H(c,&pt[8]); STORE32H(d, &pt[12]);
return
CRYPT_OK;
}
#ifdef LTC_CLEAN_STACK
int
noekeon_ecb_decrypt(
const
unsigned
char
*ct, unsigned
char
*pt, symmetric_key *skey)
{
int
err = _noekeon_ecb_decrypt(ct, pt, skey);
burn_stack(
sizeof
(ulong32) * 5 +
sizeof
(
int
));
return
err;
}
#endif
int
noekeon_test(
void
)
{
#ifndef LTC_TEST
return
CRYPT_NOP;
#else
static
const
struct
{
int
keylen;
unsigned
char
key[16], pt[16], ct[16];
} tests[] = {
{
16,
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 0x18, 0xa6, 0xec, 0xe5, 0x28, 0xaa, 0x79, 0x73,
0x28, 0xb2, 0xc0, 0x91, 0xa0, 0x2f, 0x54, 0xc5}
}
};
symmetric_key key;
unsigned
char
tmp[2][16];
int
err, i, y;
for
(i = 0; i < (
int
)(
sizeof
(tests)/
sizeof
(tests[0])); i++) {
zeromem(&key,
sizeof
(key));
if
((err = noekeon_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) {
return
err;
}
noekeon_ecb_encrypt(tests[i].pt, tmp[0], &key);
noekeon_ecb_decrypt(tmp[0], tmp[1], &key);
if
(XMEMCMP(tmp[0], tests[i].ct, 16) || XMEMCMP(tmp[1], tests[i].pt, 16)) {
#if 0
printf
(
"\n\nTest %d failed\n"
, i);
if
(XMEMCMP(tmp[0], tests[i].ct, 16)) {
printf
(
"CT: "
);
for
(i = 0; i < 16; i++) {
printf
(
"%02x "
, tmp[0][i]);
}
printf
(
"\n"
);
}
else
{
printf
(
"PT: "
);
for
(i = 0; i < 16; i++) {
printf
(
"%02x "
, tmp[1][i]);
}
printf
(
"\n"
);
}
#endif
return
CRYPT_FAIL_TESTVECTOR;
}
for
(y = 0; y < 16; y++) tmp[0][y] = 0;
for
(y = 0; y < 1000; y++) noekeon_ecb_encrypt(tmp[0], tmp[0], &key);
for
(y = 0; y < 1000; y++) noekeon_ecb_decrypt(tmp[0], tmp[0], &key);
for
(y = 0; y < 16; y++)
if
(tmp[0][y] != 0)
return
CRYPT_FAIL_TESTVECTOR;
}
return
CRYPT_OK;
#endif
}
void
noekeon_done(symmetric_key *skey)
{
}
int
noekeon_keysize(
int
*keysize)
{
LTC_ARGCHK(keysize != NULL);
if
(*keysize < 16) {
return
CRYPT_INVALID_KEYSIZE;
}
else
{
*keysize = 16;
return
CRYPT_OK;
}
}
#endif