1 /* Implementation of the Noekeon block cipher by Tom St Denis */
6 const struct _cipher_descriptor noekeon_desc =
18 static const unsigned long RC[] = {
19 0x00000080UL, 0x0000001bUL, 0x00000036UL, 0x0000006cUL,
20 0x000000d8UL, 0x000000abUL, 0x0000004dUL, 0x0000009aUL,
21 0x0000002fUL, 0x0000005eUL, 0x000000bcUL, 0x00000063UL,
22 0x000000c6UL, 0x00000097UL, 0x00000035UL, 0x0000006aUL,
26 static const unsigned long zero[] = { 0, 0, 0, 0 };
28 #define THETA(k, a, b, c, d) \
29 temp = a^c; temp = temp ^ ROL(temp, 8) ^ ROR(temp, 8); \
30 b ^= temp; d ^= temp; \
31 a ^= k[0]; b ^= k[1]; \
32 c ^= k[2]; d ^= k[3]; \
33 temp = b^d; temp = temp ^ ROL(temp, 8) ^ ROR(temp, 8); \
36 #define GAMMA(a, b, c, d) \
39 temp = d; d = a; a = temp;\
44 #define PI1(a, b, c, d) \
45 a = ROL(a, 1); c = ROL(c, 5); d = ROL(d, 2);
47 #define PI2(a, b, c, d) \
48 a = ROR(a, 1); c = ROR(c, 5); d = ROR(d, 2);
50 int noekeon_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey)
55 _ARGCHK(skey != NULL);
58 return CRYPT_INVALID_KEYSIZE;
61 if (num_rounds != 16 && num_rounds != 0) {
62 return CRYPT_INVALID_ROUNDS;
65 LOAD32L(skey->noekeon.K[0],&key[0]);
66 LOAD32L(skey->noekeon.K[1],&key[4]);
67 LOAD32L(skey->noekeon.K[2],&key[8]);
68 LOAD32L(skey->noekeon.K[3],&key[12]);
70 LOAD32L(skey->noekeon.dK[0],&key[0]);
71 LOAD32L(skey->noekeon.dK[1],&key[4]);
72 LOAD32L(skey->noekeon.dK[2],&key[8]);
73 LOAD32L(skey->noekeon.dK[3],&key[12]);
75 THETA(zero, skey->noekeon.dK[0], skey->noekeon.dK[1], skey->noekeon.dK[2], skey->noekeon.dK[3]);
81 static void _noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key)
83 void noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key)
86 unsigned long a,b,c,d,temp;
93 LOAD32L(a,&pt[0]); LOAD32L(b,&pt[4]);
94 LOAD32L(c,&pt[8]); LOAD32L(d,&pt[12]);
98 THETA(key->noekeon.K, a,b,c,d); \
103 for (r = 0; r < 16; r += 2) {
111 THETA(key->noekeon.K, a, b, c, d);
113 STORE32L(a,&ct[0]); STORE32L(b,&ct[4]);
114 STORE32L(c,&ct[8]); STORE32L(d,&ct[12]);
118 void noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *key)
120 _noekeon_ecb_encrypt(pt, ct, key);
121 burn_stack(sizeof(unsigned long) * 5 + sizeof(int));
126 static void _noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key)
128 void noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key)
131 unsigned long a,b,c,d, temp;
134 _ARGCHK(key != NULL);
138 LOAD32L(a,&ct[0]); LOAD32L(b,&ct[4]);
139 LOAD32L(c,&ct[8]); LOAD32L(d,&ct[12]);
142 THETA(key->noekeon.dK, a,b,c,d); \
149 for (r = 16; r > 0; r -= 2) {
156 THETA(key->noekeon.dK, a,b,c,d);
158 STORE32L(a,&pt[0]); STORE32L(b, &pt[4]);
159 STORE32L(c,&pt[8]); STORE32L(d, &pt[12]);
163 void noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *key)
165 _noekeon_ecb_decrypt(ct, pt, key);
166 burn_stack(sizeof(unsigned long) * 5 + sizeof(int));
170 int noekeon_test(void)
175 static const unsigned char
177 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
179 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
181 { 0x57, 0x9a, 0x6c, 0xe8, 0x91, 0x16, 0x52, 0x53,
182 0x32, 0x00, 0xca, 0x0a, 0x17, 0x5d, 0x28, 0x0e };
183 unsigned char tmp[2][16];
187 if ((err = noekeon_setup(key, 16, 0, &skey)) != CRYPT_OK) {
191 noekeon_ecb_encrypt(pt, tmp[0], &skey);
192 noekeon_ecb_decrypt(tmp[0], tmp[1], &skey);
194 if (memcmp(tmp[0], ct, 16) != 0 || memcmp(tmp[1], pt, 16) != 0) {
195 return CRYPT_FAIL_TESTVECTOR;
202 int noekeon_keysize(int *desired_keysize)
204 _ARGCHK(desired_keysize != NULL);
205 if (*desired_keysize < 16) {
206 return CRYPT_INVALID_KEYSIZE;
208 *desired_keysize = 16;