1 // SPDX-License-Identifier: BSD-2-Clause 2 /* LibTomCrypt, modular cryptographic library -- Tom St Denis 3 * 4 * LibTomCrypt is a library that provides various cryptographic 5 * algorithms in a highly modular and flexible manner. 6 * 7 * The library is free for all purposes without any express 8 * guarantee it works. 9 */ 10 /** 11 @file noekeon.c 12 Implementation of the Noekeon block cipher by Tom St Denis 13 */ 14 #include "tomcrypt_private.h" 15 16 #ifdef LTC_NOEKEON 17 18 const struct ltc_cipher_descriptor noekeon_desc = 19 { 20 "noekeon", 21 16, 22 16, 16, 16, 16, 23 &noekeon_setup, 24 &noekeon_ecb_encrypt, 25 &noekeon_ecb_decrypt, 26 &noekeon_test, 27 &noekeon_done, 28 &noekeon_keysize, 29 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 30 }; 31 32 static const ulong32 RC[] = { 33 0x00000080UL, 0x0000001bUL, 0x00000036UL, 0x0000006cUL, 34 0x000000d8UL, 0x000000abUL, 0x0000004dUL, 0x0000009aUL, 35 0x0000002fUL, 0x0000005eUL, 0x000000bcUL, 0x00000063UL, 36 0x000000c6UL, 0x00000097UL, 0x00000035UL, 0x0000006aUL, 37 0x000000d4UL 38 }; 39 40 #define kTHETA(a, b, c, d) \ 41 temp = a^c; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \ 42 b ^= temp; d ^= temp; \ 43 temp = b^d; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \ 44 a ^= temp; c ^= temp; 45 46 #define THETA(k, a, b, c, d) \ 47 temp = a^c; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \ 48 b ^= temp ^ k[1]; d ^= temp ^ k[3]; \ 49 temp = b^d; temp = temp ^ ROLc(temp, 8) ^ RORc(temp, 8); \ 50 a ^= temp ^ k[0]; c ^= temp ^ k[2]; 51 52 #define GAMMA(a, b, c, d) \ 53 b ^= ~(d|c); \ 54 a ^= c&b; \ 55 temp = d; d = a; a = temp;\ 56 c ^= a ^ b ^ d; \ 57 b ^= ~(d|c); \ 58 a ^= c&b; 59 60 #define PI1(a, b, c, d) \ 61 b = ROLc(b, 1); c = ROLc(c, 5); d = ROLc(d, 2); 62 63 #define PI2(a, b, c, d) \ 64 b = RORc(b, 1); c = RORc(c, 5); d = RORc(d, 2); 65 66 /** 67 Initialize the Noekeon block cipher 68 @param key The symmetric key you wish to pass 69 @param keylen The key length in bytes 70 @param num_rounds The number of rounds desired (0 for default) 71 @param skey The key in as scheduled by this function. 72 @return CRYPT_OK if successful 73 */ 74 int noekeon_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) 75 { 76 ulong32 temp; 77 78 LTC_ARGCHK(key != NULL); 79 LTC_ARGCHK(skey != NULL); 80 81 if (keylen != 16) { 82 return CRYPT_INVALID_KEYSIZE; 83 } 84 85 if (num_rounds != 16 && num_rounds != 0) { 86 return CRYPT_INVALID_ROUNDS; 87 } 88 89 LOAD32H(skey->noekeon.K[0],&key[0]); 90 LOAD32H(skey->noekeon.K[1],&key[4]); 91 LOAD32H(skey->noekeon.K[2],&key[8]); 92 LOAD32H(skey->noekeon.K[3],&key[12]); 93 94 LOAD32H(skey->noekeon.dK[0],&key[0]); 95 LOAD32H(skey->noekeon.dK[1],&key[4]); 96 LOAD32H(skey->noekeon.dK[2],&key[8]); 97 LOAD32H(skey->noekeon.dK[3],&key[12]); 98 99 kTHETA(skey->noekeon.dK[0], skey->noekeon.dK[1], skey->noekeon.dK[2], skey->noekeon.dK[3]); 100 101 return CRYPT_OK; 102 } 103 104 /** 105 Encrypts a block of text with Noekeon 106 @param pt The input plaintext (16 bytes) 107 @param ct The output ciphertext (16 bytes) 108 @param skey The key as scheduled 109 @return CRYPT_OK if successful 110 */ 111 #ifdef LTC_CLEAN_STACK 112 static int _noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, const symmetric_key *skey) 113 #else 114 int noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, const symmetric_key *skey) 115 #endif 116 { 117 ulong32 a,b,c,d,temp; 118 int r; 119 120 LTC_ARGCHK(skey != NULL); 121 LTC_ARGCHK(pt != NULL); 122 LTC_ARGCHK(ct != NULL); 123 124 LOAD32H(a,&pt[0]); LOAD32H(b,&pt[4]); 125 LOAD32H(c,&pt[8]); LOAD32H(d,&pt[12]); 126 127 #define ROUND(i) \ 128 a ^= RC[i]; \ 129 THETA(skey->noekeon.K, a,b,c,d); \ 130 PI1(a,b,c,d); \ 131 GAMMA(a,b,c,d); \ 132 PI2(a,b,c,d); 133 134 for (r = 0; r < 16; ++r) { 135 ROUND(r); 136 } 137 138 #undef ROUND 139 140 a ^= RC[16]; 141 THETA(skey->noekeon.K, a, b, c, d); 142 143 STORE32H(a,&ct[0]); STORE32H(b,&ct[4]); 144 STORE32H(c,&ct[8]); STORE32H(d,&ct[12]); 145 146 return CRYPT_OK; 147 } 148 149 #ifdef LTC_CLEAN_STACK 150 int noekeon_ecb_encrypt(const unsigned char *pt, unsigned char *ct, const symmetric_key *skey) 151 { 152 int err = _noekeon_ecb_encrypt(pt, ct, skey); 153 burn_stack(sizeof(ulong32) * 5 + sizeof(int)); 154 return err; 155 } 156 #endif 157 158 /** 159 Decrypts a block of text with Noekeon 160 @param ct The input ciphertext (16 bytes) 161 @param pt The output plaintext (16 bytes) 162 @param skey The key as scheduled 163 @return CRYPT_OK if successful 164 */ 165 #ifdef LTC_CLEAN_STACK 166 static int _noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, const symmetric_key *skey) 167 #else 168 int noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, const symmetric_key *skey) 169 #endif 170 { 171 ulong32 a,b,c,d, temp; 172 int r; 173 174 LTC_ARGCHK(skey != NULL); 175 LTC_ARGCHK(pt != NULL); 176 LTC_ARGCHK(ct != NULL); 177 178 LOAD32H(a,&ct[0]); LOAD32H(b,&ct[4]); 179 LOAD32H(c,&ct[8]); LOAD32H(d,&ct[12]); 180 181 182 #define ROUND(i) \ 183 THETA(skey->noekeon.dK, a,b,c,d); \ 184 a ^= RC[i]; \ 185 PI1(a,b,c,d); \ 186 GAMMA(a,b,c,d); \ 187 PI2(a,b,c,d); 188 189 for (r = 16; r > 0; --r) { 190 ROUND(r); 191 } 192 193 #undef ROUND 194 195 THETA(skey->noekeon.dK, a,b,c,d); 196 a ^= RC[0]; 197 STORE32H(a,&pt[0]); STORE32H(b, &pt[4]); 198 STORE32H(c,&pt[8]); STORE32H(d, &pt[12]); 199 return CRYPT_OK; 200 } 201 202 #ifdef LTC_CLEAN_STACK 203 int noekeon_ecb_decrypt(const unsigned char *ct, unsigned char *pt, const symmetric_key *skey) 204 { 205 int err = _noekeon_ecb_decrypt(ct, pt, skey); 206 burn_stack(sizeof(ulong32) * 5 + sizeof(int)); 207 return err; 208 } 209 #endif 210 211 /** 212 Performs a self-test of the Noekeon block cipher 213 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled 214 */ 215 int noekeon_test(void) 216 { 217 #ifndef LTC_TEST 218 return CRYPT_NOP; 219 #else 220 static const struct { 221 int keylen; 222 unsigned char key[16], pt[16], ct[16]; 223 } tests[] = { 224 { 225 16, 226 { 0xAA, 0x3C, 0x8C, 0x86, 0xD9, 0x8B, 0xF8, 0xBE, 0x21, 0xE0, 0x36, 0x09, 0x78, 0xFB, 0xE4, 0x90 }, 227 { 0xE4, 0x96, 0x6C, 0xD3, 0x13, 0xA0, 0x6C, 0xAF, 0xD0, 0x23, 0xC9, 0xFD, 0x45, 0x32, 0x23, 0x16 }, 228 { 0xA6, 0xEC, 0xB8, 0xA8, 0x61, 0xFD, 0x62, 0xD9, 0x13, 0x02, 0xFE, 0x9E, 0x47, 0x01, 0x3F, 0xC3 } 229 }, 230 { 231 16, 232 { 0xED, 0x43, 0xD1, 0x87, 0x21, 0x7E, 0xE0, 0x97, 0x3D, 0x76, 0xC3, 0x37, 0x2E, 0x7D, 0xAE, 0xD3 }, 233 { 0xE3, 0x38, 0x32, 0xCC, 0xF2, 0x2F, 0x2F, 0x0A, 0x4A, 0x8B, 0x8F, 0x18, 0x12, 0x20, 0x17, 0xD3 }, 234 { 0x94, 0xA5, 0xDF, 0xF5, 0xAE, 0x1C, 0xBB, 0x22, 0xAD, 0xEB, 0xA7, 0x0D, 0xB7, 0x82, 0x90, 0xA0 } 235 }, 236 { 237 16, 238 { 0x6F, 0xDC, 0x23, 0x38, 0xF2, 0x10, 0xFB, 0xD3, 0xC1, 0x8C, 0x02, 0xF6, 0xB4, 0x6A, 0xD5, 0xA8 }, 239 { 0xDB, 0x29, 0xED, 0xB5, 0x5F, 0xB3, 0x60, 0x3A, 0x92, 0xA8, 0xEB, 0x9C, 0x6D, 0x9D, 0x3E, 0x8F }, 240 { 0x78, 0xF3, 0x6F, 0xF8, 0x9E, 0xBB, 0x8C, 0x6A, 0xE8, 0x10, 0xF7, 0x00, 0x22, 0x15, 0x30, 0x3D } 241 }, 242 { 243 16, 244 { 0x2C, 0x0C, 0x02, 0xEF, 0x6B, 0xC4, 0xF2, 0x0B, 0x2E, 0xB9, 0xE0, 0xBF, 0xD9, 0x36, 0xC2, 0x4E }, 245 { 0x84, 0xE2, 0xFE, 0x64, 0xB1, 0xB9, 0xFE, 0x76, 0xA8, 0x3F, 0x45, 0xC7, 0x40, 0x7A, 0xAF, 0xEE }, 246 { 0x2A, 0x08, 0xD6, 0xA2, 0x1C, 0x63, 0x08, 0xB0, 0xF8, 0xBC, 0xB3, 0xA1, 0x66, 0xF7, 0xAE, 0xCF } 247 }, 248 { 249 16, 250 { 0x6F, 0x30, 0xF8, 0x9F, 0xDA, 0x6E, 0xA0, 0x91, 0x04, 0x0F, 0x6C, 0x8B, 0x7D, 0xF7, 0x2A, 0x4B }, 251 { 0x65, 0xB6, 0xA6, 0xD0, 0x42, 0x14, 0x08, 0x60, 0x34, 0x8D, 0x37, 0x2F, 0x01, 0xF0, 0x46, 0xBE }, 252 { 0x66, 0xAC, 0x0B, 0x62, 0x1D, 0x68, 0x11, 0xF5, 0x27, 0xB1, 0x13, 0x5D, 0xF3, 0x2A, 0xE9, 0x18 } 253 }, 254 { 255 16, 256 { 0xCA, 0xA4, 0x16, 0xB7, 0x1C, 0x92, 0x2E, 0xAD, 0xEB, 0xA7, 0xDB, 0x69, 0x92, 0xCB, 0x35, 0xEF }, 257 { 0x81, 0x6F, 0x8E, 0x4D, 0x96, 0xC6, 0xB3, 0x67, 0x83, 0xF5, 0x63, 0xC7, 0x20, 0x6D, 0x40, 0x23 }, 258 { 0x44, 0xF7, 0x63, 0x62, 0xF0, 0x43, 0xBB, 0x67, 0x4A, 0x75, 0x12, 0x42, 0x46, 0x29, 0x28, 0x19 } 259 }, 260 { 261 16, 262 { 0x6B, 0xCF, 0x22, 0x2F, 0xE0, 0x1B, 0xB0, 0xAA, 0xD8, 0x3C, 0x91, 0x99, 0x18, 0xB2, 0x28, 0xE8 }, 263 { 0x7C, 0x37, 0xC7, 0xD0, 0xAC, 0x92, 0x29, 0xF1, 0x60, 0x82, 0x93, 0x89, 0xAA, 0x61, 0xAA, 0xA9 }, 264 { 0xE5, 0x89, 0x1B, 0xB3, 0xFE, 0x8B, 0x0C, 0xA1, 0xA6, 0xC7, 0xBE, 0x12, 0x73, 0x0F, 0xC1, 0x19 } 265 }, 266 { 267 16, 268 { 0xE6, 0xD0, 0xF1, 0x03, 0x2E, 0xDE, 0x70, 0x8D, 0xD8, 0x9E, 0x36, 0x5C, 0x05, 0x52, 0xE7, 0x0D }, 269 { 0xE2, 0x42, 0xE7, 0x92, 0x0E, 0xF7, 0x82, 0xA2, 0xB8, 0x21, 0x8D, 0x26, 0xBA, 0x2D, 0xE6, 0x32 }, 270 { 0x1E, 0xDD, 0x75, 0x22, 0xB9, 0x36, 0x8A, 0x0F, 0x32, 0xFD, 0xD4, 0x48, 0x65, 0x12, 0x5A, 0x2F } 271 } 272 }; 273 symmetric_key key; 274 unsigned char tmp[2][16]; 275 int err, i, y; 276 277 for (i = 0; i < (int)(sizeof(tests)/sizeof(tests[0])); i++) { 278 zeromem(&key, sizeof(key)); 279 if ((err = noekeon_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) { 280 return err; 281 } 282 283 noekeon_ecb_encrypt(tests[i].pt, tmp[0], &key); 284 noekeon_ecb_decrypt(tmp[0], tmp[1], &key); 285 if (compare_testvector(tmp[0], 16, tests[i].ct, 16, "Noekeon Encrypt", i) || 286 compare_testvector(tmp[1], 16, tests[i].pt, 16, "Noekeon Decrypt", i)) { 287 return CRYPT_FAIL_TESTVECTOR; 288 } 289 290 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ 291 for (y = 0; y < 16; y++) tmp[0][y] = 0; 292 for (y = 0; y < 1000; y++) noekeon_ecb_encrypt(tmp[0], tmp[0], &key); 293 for (y = 0; y < 1000; y++) noekeon_ecb_decrypt(tmp[0], tmp[0], &key); 294 for (y = 0; y < 16; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR; 295 } 296 return CRYPT_OK; 297 #endif 298 } 299 300 /** Terminate the context 301 @param skey The scheduled key 302 */ 303 void noekeon_done(symmetric_key *skey) 304 { 305 LTC_UNUSED_PARAM(skey); 306 } 307 308 /** 309 Gets suitable key size 310 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable. 311 @return CRYPT_OK if the input key size is acceptable. 312 */ 313 int noekeon_keysize(int *keysize) 314 { 315 LTC_ARGCHK(keysize != NULL); 316 if (*keysize < 16) { 317 return CRYPT_INVALID_KEYSIZE; 318 } 319 *keysize = 16; 320 return CRYPT_OK; 321 } 322 323 #endif 324 325 326 /* ref: $Format:%D$ */ 327 /* git commit: $Format:%H$ */ 328 /* commit time: $Format:%ai$ */ 329