00001
00002
00003 #include "pch.h"
00004 #include "tiger.h"
00005
00006 #ifdef WORD64_AVAILABLE
00007
00008 NAMESPACE_BEGIN(CryptoPP)
00009
00010 void Tiger::Init()
00011 {
00012 digest[0] = W64LIT(0x0123456789ABCDEF);
00013 digest[1] = W64LIT(0xFEDCBA9876543210);
00014 digest[2] = W64LIT(0xF096A5B4C3B2E187);
00015 }
00016
00017 void Tiger::Final(byte *hash)
00018 {
00019 PadLastBlock(56, 0x01);
00020 CorrectEndianess(data, data, 56);
00021
00022 data[7] = countLo;
00023
00024 Transform(digest, data);
00025 CorrectEndianess(digest, digest, DigestSize());
00026 memcpy(hash, digest, DigestSize());
00027
00028 Reinit();
00029 }
00030
00031 #define t1 (table)
00032 #define t2 (table+256)
00033 #define t3 (table+256*2)
00034 #define t4 (table+256*3)
00035
00036 #define round(a,b,c,x,mul) \
00037 c ^= x; \
00038 a -= t1[GETBYTE(c,0)] ^ t2[GETBYTE(c,2)] ^ t3[GETBYTE(c,4)] ^ t4[GETBYTE(c,6)]; \
00039 b += t4[GETBYTE(c,1)] ^ t3[GETBYTE(c,3)] ^ t2[GETBYTE(c,5)] ^ t1[GETBYTE(c,7)]; \
00040 b *= mul
00041
00042 #define pass(a,b,c,mul,X) \
00043 round(a,b,c,X[0],mul); \
00044 round(b,c,a,X[1],mul); \
00045 round(c,a,b,X[2],mul); \
00046 round(a,b,c,X[3],mul); \
00047 round(b,c,a,X[4],mul); \
00048 round(c,a,b,X[5],mul); \
00049 round(a,b,c,X[6],mul); \
00050 round(b,c,a,X[7],mul)
00051
00052 #define key_schedule(Y,X) \
00053 Y[0] = X[0] - (X[7]^W64LIT(0xA5A5A5A5A5A5A5A5)); \
00054 Y[1] = X[1] ^ Y[0]; \
00055 Y[2] = X[2] + Y[1]; \
00056 Y[3] = X[3] - (Y[2] ^ ((~Y[1])<<19)); \
00057 Y[4] = X[4] ^ Y[3]; \
00058 Y[5] = X[5] + Y[4]; \
00059 Y[6] = X[6] - (Y[5] ^ ((~Y[4])>>23)); \
00060 Y[7] = X[7] ^ Y[6]; \
00061 Y[0] += Y[7]; \
00062 Y[1] -= Y[0] ^ ((~Y[7])<<19); \
00063 Y[2] ^= Y[1]; \
00064 Y[3] += Y[2]; \
00065 Y[4] -= Y[3] ^ ((~Y[2])>>23); \
00066 Y[5] ^= Y[4]; \
00067 Y[6] += Y[5]; \
00068 Y[7] -= Y[6] ^ W64LIT(0x0123456789ABCDEF)
00069
00070 void Tiger::Transform (word64 *digest, const word64 *X)
00071 {
00072 word64 a = digest[0];
00073 word64 b = digest[1];
00074 word64 c = digest[2];
00075 word64 Y[8];
00076
00077 pass(a,b,c,5,X);
00078 key_schedule(Y,X);
00079 pass(c,a,b,7,Y);
00080 key_schedule(Y,Y);
00081 pass(b,c,a,9,Y);
00082
00083 digest[0] = a ^ digest[0];
00084 digest[1] = b - digest[1];
00085 digest[2] = c + digest[2];
00086
00087 Y[0] = Y[1] = Y[2] = Y[3] = Y[4] = Y[5] = Y[6] = Y[7] = 0;
00088 }
00089
00090 NAMESPACE_END
00091
00092 #endif // WORD64_AVAILABLE
