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comparison libtomcrypt/src/ciphers/skipjack.c @ 1511:5916af64acd4 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Sat, 17 Feb 2018 19:29:51 +0800
parents 6dba84798cd5
children
comparison
equal deleted inserted replaced
1457:32f990cc96b1 1511:5916af64acd4
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 9
12 /** 10 /**
13 @file skipjack.c 11 @file skipjack.c
14 Skipjack Implementation by Tom St Denis 12 Skipjack Implementation by Tom St Denis
26 &skipjack_ecb_encrypt, 24 &skipjack_ecb_encrypt,
27 &skipjack_ecb_decrypt, 25 &skipjack_ecb_decrypt,
28 &skipjack_test, 26 &skipjack_test,
29 &skipjack_done, 27 &skipjack_done,
30 &skipjack_keysize, 28 &skipjack_keysize,
31 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 29 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
32 }; 30 };
33 31
34 static const unsigned char sbox[256] = { 32 static const unsigned char sbox[256] = {
35 0xa3,0xd7,0x09,0x83,0xf8,0x48,0xf6,0xf4,0xb3,0x21,0x15,0x78,0x99,0xb1,0xaf,0xf9, 33 0xa3,0xd7,0x09,0x83,0xf8,0x48,0xf6,0xf4,0xb3,0x21,0x15,0x78,0x99,0xb1,0xaf,0xf9,
36 0xe7,0x2d,0x4d,0x8a,0xce,0x4c,0xca,0x2e,0x52,0x95,0xd9,0x1e,0x4e,0x38,0x44,0x28, 34 0xe7,0x2d,0x4d,0x8a,0xce,0x4c,0xca,0x2e,0x52,0x95,0xd9,0x1e,0x4e,0x38,0x44,0x28,
73 71
74 if (keylen != 10) { 72 if (keylen != 10) {
75 return CRYPT_INVALID_KEYSIZE; 73 return CRYPT_INVALID_KEYSIZE;
76 } 74 }
77 75
78 if (num_rounds != 32 && num_rounds != 0) { 76 if (num_rounds != 32 && num_rounds != 0) {
79 return CRYPT_INVALID_ROUNDS; 77 return CRYPT_INVALID_ROUNDS;
80 } 78 }
81 79
82 /* make sure the key is in range for platforms where CHAR_BIT != 8 */ 80 /* make sure the key is in range for platforms where CHAR_BIT != 8 */
83 for (x = 0; x < 10; x++) { 81 for (x = 0; x < 10; x++) {
199 197
200 /** 198 /**
201 Decrypts a block of text with Skipjack 199 Decrypts a block of text with Skipjack
202 @param ct The input ciphertext (8 bytes) 200 @param ct The input ciphertext (8 bytes)
203 @param pt The output plaintext (8 bytes) 201 @param pt The output plaintext (8 bytes)
204 @param skey The key as scheduled 202 @param skey The key as scheduled
205 @return CRYPT_OK if successful 203 @return CRYPT_OK if successful
206 */ 204 */
207 #ifdef LTC_CLEAN_STACK 205 #ifdef LTC_CLEAN_STACK
208 static int _skipjack_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) 206 static int _skipjack_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
209 #else 207 #else
221 w1 = ((unsigned)ct[0]<<8)|ct[1]; 219 w1 = ((unsigned)ct[0]<<8)|ct[1];
222 w2 = ((unsigned)ct[2]<<8)|ct[3]; 220 w2 = ((unsigned)ct[2]<<8)|ct[3];
223 w3 = ((unsigned)ct[4]<<8)|ct[5]; 221 w3 = ((unsigned)ct[4]<<8)|ct[5];
224 w4 = ((unsigned)ct[6]<<8)|ct[7]; 222 w4 = ((unsigned)ct[6]<<8)|ct[7];
225 223
226 /* 8 rounds of RULE B^-1 224 /* 8 rounds of RULE B^-1
227 225
228 Note the value "kp = 8" comes from "kp = (32 * 4) mod 10" where 32*4 is 128 which mod 10 is 8 226 Note the value "kp = 8" comes from "kp = (32 * 4) mod 10" where 32*4 is 128 which mod 10 is 8
229 */ 227 */
230 for (x = 32, kp = 8; x > 24; x--) { 228 for (x = 32, kp = 8; x > 24; x--) {
231 RULE_B1; 229 RULE_B1;
271 */ 269 */
272 int skipjack_test(void) 270 int skipjack_test(void)
273 { 271 {
274 #ifndef LTC_TEST 272 #ifndef LTC_TEST
275 return CRYPT_NOP; 273 return CRYPT_NOP;
276 #else 274 #else
277 static const struct { 275 static const struct {
278 unsigned char key[10], pt[8], ct[8]; 276 unsigned char key[10], pt[8], ct[8];
279 } tests[] = { 277 } tests[] = {
280 { 278 {
281 { 0x00, 0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11 }, 279 { 0x00, 0x99, 0x88, 0x77, 0x66, 0x55, 0x44, 0x33, 0x22, 0x11 },
296 /* encrypt and decrypt */ 294 /* encrypt and decrypt */
297 skipjack_ecb_encrypt(tests[x].pt, buf[0], &key); 295 skipjack_ecb_encrypt(tests[x].pt, buf[0], &key);
298 skipjack_ecb_decrypt(buf[0], buf[1], &key); 296 skipjack_ecb_decrypt(buf[0], buf[1], &key);
299 297
300 /* compare */ 298 /* compare */
301 if (XMEMCMP(buf[0], tests[x].ct, 8) != 0 || XMEMCMP(buf[1], tests[x].pt, 8) != 0) { 299 if (compare_testvector(buf[0], 8, tests[x].ct, 8, "Skipjack Encrypt", x) != 0 ||
300 compare_testvector(buf[1], 8, tests[x].pt, 8, "Skipjack Decrypt", x) != 0) {
302 return CRYPT_FAIL_TESTVECTOR; 301 return CRYPT_FAIL_TESTVECTOR;
303 } 302 }
304 303
305 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ 304 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
306 for (y = 0; y < 8; y++) buf[0][y] = 0; 305 for (y = 0; y < 8; y++) buf[0][y] = 0;
311 310
312 return CRYPT_OK; 311 return CRYPT_OK;
313 #endif 312 #endif
314 } 313 }
315 314
316 /** Terminate the context 315 /** Terminate the context
317 @param skey The scheduled key 316 @param skey The scheduled key
318 */ 317 */
319 void skipjack_done(symmetric_key *skey) 318 void skipjack_done(symmetric_key *skey)
320 { 319 {
320 LTC_UNUSED_PARAM(skey);
321 } 321 }
322 322
323 /** 323 /**
324 Gets suitable key size 324 Gets suitable key size
325 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable. 325 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable.
336 return CRYPT_OK; 336 return CRYPT_OK;
337 } 337 }
338 338
339 #endif 339 #endif
340 340
341 /* $Source$ */ 341 /* ref: $Format:%D$ */
342 /* $Revision$ */ 342 /* git commit: $Format:%H$ */
343 /* $Date$ */ 343 /* commit time: $Format:%ai$ */