X-Git-Url: https://pd.if.org/git/?p=zpackage;a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fciphers%2Fmulti2.c;fp=libtomcrypt%2Fsrc%2Fciphers%2Fmulti2.c;h=0000000000000000000000000000000000000000;hp=86c181204bdf244afaedb83e85769066ffb59f62;hb=094fa8c1bc2e27a560833c6a829b1d9b60de7034;hpb=27410df6ded2d78850397c159cbccff1a78012f2 diff --git a/libtomcrypt/src/ciphers/multi2.c b/libtomcrypt/src/ciphers/multi2.c deleted file mode 100644 index 86c1812..0000000 --- a/libtomcrypt/src/ciphers/multi2.c +++ /dev/null @@ -1,319 +0,0 @@ -/* LibTomCrypt, modular cryptographic library -- Tom St Denis - * - * LibTomCrypt is a library that provides various cryptographic - * algorithms in a highly modular and flexible manner. - * - * The library is free for all purposes without any express - * guarantee it works. - */ - -/** - @file multi2.c - Multi-2 implementation (not public domain, hence the default disable) -*/ -#include "tomcrypt.h" - -#ifdef LTC_MULTI2 - -static void pi1(ulong32 *p) -{ - p[1] ^= p[0]; -} - -static void pi2(ulong32 *p, ulong32 *k) -{ - ulong32 t; - t = (p[1] + k[0]) & 0xFFFFFFFFUL; - t = (ROL(t, 1) + t - 1) & 0xFFFFFFFFUL; - t = (ROL(t, 4) ^ t) & 0xFFFFFFFFUL; - p[0] ^= t; -} - -static void pi3(ulong32 *p, ulong32 *k) -{ - ulong32 t; - t = p[0] + k[1]; - t = (ROL(t, 2) + t + 1) & 0xFFFFFFFFUL; - t = (ROL(t, 8) ^ t) & 0xFFFFFFFFUL; - t = (t + k[2]) & 0xFFFFFFFFUL; - t = (ROL(t, 1) - t) & 0xFFFFFFFFUL; - t = ROL(t, 16) ^ (p[0] | t); - p[1] ^= t; -} - -static void pi4(ulong32 *p, ulong32 *k) -{ - ulong32 t; - t = (p[1] + k[3]) & 0xFFFFFFFFUL; - t = (ROL(t, 2) + t + 1) & 0xFFFFFFFFUL; - p[0] ^= t; -} - -static void setup(ulong32 *dk, ulong32 *k, ulong32 *uk) -{ - int n, t; - ulong32 p[2]; - - p[0] = dk[0]; p[1] = dk[1]; - - t = 4; - n = 0; - pi1(p); - pi2(p, k); - uk[n++] = p[0]; - pi3(p, k); - uk[n++] = p[1]; - pi4(p, k); - uk[n++] = p[0]; - pi1(p); - uk[n++] = p[1]; - pi2(p, k+t); - uk[n++] = p[0]; - pi3(p, k+t); - uk[n++] = p[1]; - pi4(p, k+t); - uk[n++] = p[0]; - pi1(p); - uk[n++] = p[1]; -} - -static void encrypt(ulong32 *p, int N, ulong32 *uk) -{ - int n, t; - for (t = n = 0; ; ) { - pi1(p); if (++n == N) break; - pi2(p, uk+t); if (++n == N) break; - pi3(p, uk+t); if (++n == N) break; - pi4(p, uk+t); if (++n == N) break; - t ^= 4; - } -} - -static void decrypt(ulong32 *p, int N, ulong32 *uk) -{ - int n, t; - for (t = 4*(((N-1)>>2)&1), n = N; ; ) { - switch (n<=4 ? n : ((n-1)%4)+1) { - case 4: pi4(p, uk+t); --n; /* FALLTHROUGH */ - case 3: pi3(p, uk+t); --n; /* FALLTHROUGH */ - case 2: pi2(p, uk+t); --n; /* FALLTHROUGH */ - case 1: pi1(p); --n; break; - case 0: return; - } - t ^= 4; - } -} - -const struct ltc_cipher_descriptor multi2_desc = { - "multi2", - 22, - 40, 40, 8, 128, - &multi2_setup, - &multi2_ecb_encrypt, - &multi2_ecb_decrypt, - &multi2_test, - &multi2_done, - &multi2_keysize, - NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL -}; - -int multi2_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) -{ - ulong32 sk[8], dk[2]; - int x; - - LTC_ARGCHK(key != NULL); - LTC_ARGCHK(skey != NULL); - - if (keylen != 40) return CRYPT_INVALID_KEYSIZE; - if (num_rounds == 0) num_rounds = 128; - - skey->multi2.N = num_rounds; - for (x = 0; x < 8; x++) { - LOAD32H(sk[x], key + x*4); - } - LOAD32H(dk[0], key + 32); - LOAD32H(dk[1], key + 36); - setup(dk, sk, skey->multi2.uk); - - zeromem(sk, sizeof(sk)); - zeromem(dk, sizeof(dk)); - return CRYPT_OK; -} - -/** - Encrypts a block of text with multi2 - @param pt The input plaintext (8 bytes) - @param ct The output ciphertext (8 bytes) - @param skey The key as scheduled - @return CRYPT_OK if successful -*/ -int multi2_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) -{ - ulong32 p[2]; - LTC_ARGCHK(pt != NULL); - LTC_ARGCHK(ct != NULL); - LTC_ARGCHK(skey != NULL); - LOAD32H(p[0], pt); - LOAD32H(p[1], pt+4); - encrypt(p, skey->multi2.N, skey->multi2.uk); - STORE32H(p[0], ct); - STORE32H(p[1], ct+4); - return CRYPT_OK; -} - -/** - Decrypts a block of text with multi2 - @param ct The input ciphertext (8 bytes) - @param pt The output plaintext (8 bytes) - @param skey The key as scheduled - @return CRYPT_OK if successful -*/ -int multi2_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) -{ - ulong32 p[2]; - LTC_ARGCHK(pt != NULL); - LTC_ARGCHK(ct != NULL); - LTC_ARGCHK(skey != NULL); - LOAD32H(p[0], ct); - LOAD32H(p[1], ct+4); - decrypt(p, skey->multi2.N, skey->multi2.uk); - STORE32H(p[0], pt); - STORE32H(p[1], pt+4); - return CRYPT_OK; -} - -/** - Performs a self-test of the multi2 block cipher - @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled -*/ -int multi2_test(void) -{ - static const struct { - unsigned char key[40]; - unsigned char pt[8], ct[8]; - int rounds; - } tests[] = { -{ - { - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, - - 0x01, 0x23, 0x45, 0x67, - 0x89, 0xAB, 0xCD, 0xEF - }, - { - 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x01, - }, - { - 0xf8, 0x94, 0x40, 0x84, - 0x5e, 0x11, 0xcf, 0x89 - }, - 128, -}, -{ - { - 0x35, 0x91, 0x9d, 0x96, - 0x07, 0x02, 0xe2, 0xce, - 0x8d, 0x0b, 0x58, 0x3c, - 0xc9, 0xc8, 0x9d, 0x59, - 0xa2, 0xae, 0x96, 0x4e, - 0x87, 0x82, 0x45, 0xed, - 0x3f, 0x2e, 0x62, 0xd6, - 0x36, 0x35, 0xd0, 0x67, - - 0xb1, 0x27, 0xb9, 0x06, - 0xe7, 0x56, 0x22, 0x38, - }, - { - 0x1f, 0xb4, 0x60, 0x60, - 0xd0, 0xb3, 0x4f, 0xa5 - }, - { - 0xca, 0x84, 0xa9, 0x34, - 0x75, 0xc8, 0x60, 0xe5 - }, - 216, -} -}; - unsigned char buf[8]; - symmetric_key skey; - int err, x; - - for (x = 1; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) { - if ((err = multi2_setup(tests[x].key, 40, tests[x].rounds, &skey)) != CRYPT_OK) { - return err; - } - if ((err = multi2_ecb_encrypt(tests[x].pt, buf, &skey)) != CRYPT_OK) { - return err; - } - - if (compare_testvector(buf, 8, tests[x].ct, 8, "Multi2 Encrypt", x)) { - return CRYPT_FAIL_TESTVECTOR; - } - - if ((err = multi2_ecb_decrypt(buf, buf, &skey)) != CRYPT_OK) { - return err; - } - if (compare_testvector(buf, 8, tests[x].pt, 8, "Multi2 Decrypt", x)) { - return CRYPT_FAIL_TESTVECTOR; - } - } - - for (x = 128; x < 256; ++x) { - unsigned char ct[8]; - - if ((err = multi2_setup(tests[0].key, 40, x, &skey)) != CRYPT_OK) { - return err; - } - if ((err = multi2_ecb_encrypt(tests[0].pt, ct, &skey)) != CRYPT_OK) { - return err; - } - if ((err = multi2_ecb_decrypt(ct, buf, &skey)) != CRYPT_OK) { - return err; - } - if (compare_testvector(buf, 8, tests[0].pt, 8, "Multi2 Rounds", x)) { - return CRYPT_FAIL_TESTVECTOR; - } - } - - return CRYPT_OK; -} - -/** Terminate the context - @param skey The scheduled key -*/ -void multi2_done(symmetric_key *skey) -{ - LTC_UNUSED_PARAM(skey); -} - -/** - Gets suitable key size - @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable. - @return CRYPT_OK if the input key size is acceptable. -*/ -int multi2_keysize(int *keysize) -{ - LTC_ARGCHK(keysize != NULL); - if (*keysize >= 40) { - *keysize = 40; - } else { - return CRYPT_INVALID_KEYSIZE; - } - return CRYPT_OK; -} - -#endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */