Main Page | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Class Members | File Members

ttmac.cpp

00001 // ttmac.cpp - written and placed in the public domain by Kevin Springle 00002 00003 #include "pch.h" 00004 #include "ttmac.h" 00005 #include "misc.h" 00006 00007 NAMESPACE_BEGIN(CryptoPP) 00008 00009 void TTMAC_Base::UncheckedSetKey(const byte *userKey, unsigned int keylength) 00010 { 00011 AssertValidKeyLength(keylength); 00012 00013 memcpy(m_key, userKey, KEYLENGTH); 00014 CorrectEndianess(m_key, m_key, KEYLENGTH); 00015 00016 Init(); 00017 } 00018 00019 void TTMAC_Base::Init() 00020 { 00021 m_digest[0] = m_digest[5] = m_key[0]; 00022 m_digest[1] = m_digest[6] = m_key[1]; 00023 m_digest[2] = m_digest[7] = m_key[2]; 00024 m_digest[3] = m_digest[8] = m_key[3]; 00025 m_digest[4] = m_digest[9] = m_key[4]; 00026 } 00027 00028 void TTMAC_Base::TruncatedFinal(byte *hash, unsigned int size) 00029 { 00030 PadLastBlock(BlockSize() - 2*sizeof(HashWordType)); 00031 CorrectEndianess(m_data, m_data, BlockSize() - 2*sizeof(HashWordType)); 00032 00033 m_data[m_data.size()-2] = GetBitCountLo(); 00034 m_data[m_data.size()-1] = GetBitCountHi(); 00035 00036 Transform(m_digest, m_data, true); 00037 00038 word32 t2 = m_digest[2]; 00039 word32 t3 = m_digest[3]; 00040 if (size != DIGESTSIZE) 00041 { 00042 switch (size) 00043 { 00044 case 16: 00045 m_digest[3] += m_digest[1] + m_digest[4]; 00046 00047 case 12: 00048 m_digest[2] += m_digest[0] + t3; 00049 00050 case 8: 00051 m_digest[0] += m_digest[1] + t3; 00052 m_digest[1] += m_digest[4] + t2; 00053 break; 00054 00055 case 4: 00056 m_digest[0] += 00057 m_digest[1] + 00058 m_digest[2] + 00059 m_digest[3] + 00060 m_digest[4]; 00061 break; 00062 00063 case 0: 00064 // Used by HashTransformation::Restart() 00065 break; 00066 00067 default: 00068 throw InvalidArgument("TTMAC_Base: can't truncate a Two-Track-MAC 20 byte digest to " + IntToString(size) + " bytes"); 00069 break; 00070 } 00071 } 00072 00073 CorrectEndianess(m_digest, m_digest, size); 00074 memcpy(hash, m_digest, size); 00075 00076 Restart(); // reinit for next use 00077 } 00078 00079 // RIPEMD-160 definitions used by Two-Track-MAC 00080 00081 #define F(x, y, z) (x ^ y ^ z) 00082 #define G(x, y, z) (z ^ (x & (y^z))) 00083 #define H(x, y, z) (z ^ (x | ~y)) 00084 #define I(x, y, z) (y ^ (z & (x^y))) 00085 #define J(x, y, z) (x ^ (y | ~z)) 00086 00087 #define k0 0 00088 #define k1 0x5a827999UL 00089 #define k2 0x6ed9eba1UL 00090 #define k3 0x8f1bbcdcUL 00091 #define k4 0xa953fd4eUL 00092 #define k5 0x50a28be6UL 00093 #define k6 0x5c4dd124UL 00094 #define k7 0x6d703ef3UL 00095 #define k8 0x7a6d76e9UL 00096 #define k9 0 00097 00098 void TTMAC_Base::Transform(word32 *digest, const word32 *X, bool last) 00099 { 00100 #define Subround(f, a, b, c, d, e, x, s, k) \ 00101 a += f(b, c, d) + x + k;\ 00102 a = rotlFixed((word32)a, s) + e;\ 00103 c = rotlFixed((word32)c, 10U) 00104 00105 word32 a1, b1, c1, d1, e1, a2, b2, c2, d2, e2; 00106 word32 *trackA, *trackB; 00107 00108 if (!last) 00109 { 00110 trackA = digest; 00111 trackB = digest+5; 00112 } 00113 else 00114 { 00115 trackB = digest; 00116 trackA = digest+5; 00117 } 00118 a1 = trackA[0]; 00119 b1 = trackA[1]; 00120 c1 = trackA[2]; 00121 d1 = trackA[3]; 00122 e1 = trackA[4]; 00123 a2 = trackB[0]; 00124 b2 = trackB[1]; 00125 c2 = trackB[2]; 00126 d2 = trackB[3]; 00127 e2 = trackB[4]; 00128 00129 Subround(F, a1, b1, c1, d1, e1, X[ 0], 11, k0); 00130 Subround(F, e1, a1, b1, c1, d1, X[ 1], 14, k0); 00131 Subround(F, d1, e1, a1, b1, c1, X[ 2], 15, k0); 00132 Subround(F, c1, d1, e1, a1, b1, X[ 3], 12, k0); 00133 Subround(F, b1, c1, d1, e1, a1, X[ 4], 5, k0); 00134 Subround(F, a1, b1, c1, d1, e1, X[ 5], 8, k0); 00135 Subround(F, e1, a1, b1, c1, d1, X[ 6], 7, k0); 00136 Subround(F, d1, e1, a1, b1, c1, X[ 7], 9, k0); 00137 Subround(F, c1, d1, e1, a1, b1, X[ 8], 11, k0); 00138 Subround(F, b1, c1, d1, e1, a1, X[ 9], 13, k0); 00139 Subround(F, a1, b1, c1, d1, e1, X[10], 14, k0); 00140 Subround(F, e1, a1, b1, c1, d1, X[11], 15, k0); 00141 Subround(F, d1, e1, a1, b1, c1, X[12], 6, k0); 00142 Subround(F, c1, d1, e1, a1, b1, X[13], 7, k0); 00143 Subround(F, b1, c1, d1, e1, a1, X[14], 9, k0); 00144 Subround(F, a1, b1, c1, d1, e1, X[15], 8, k0); 00145 00146 Subround(G, e1, a1, b1, c1, d1, X[ 7], 7, k1); 00147 Subround(G, d1, e1, a1, b1, c1, X[ 4], 6, k1); 00148 Subround(G, c1, d1, e1, a1, b1, X[13], 8, k1); 00149 Subround(G, b1, c1, d1, e1, a1, X[ 1], 13, k1); 00150 Subround(G, a1, b1, c1, d1, e1, X[10], 11, k1); 00151 Subround(G, e1, a1, b1, c1, d1, X[ 6], 9, k1); 00152 Subround(G, d1, e1, a1, b1, c1, X[15], 7, k1); 00153 Subround(G, c1, d1, e1, a1, b1, X[ 3], 15, k1); 00154 Subround(G, b1, c1, d1, e1, a1, X[12], 7, k1); 00155 Subround(G, a1, b1, c1, d1, e1, X[ 0], 12, k1); 00156 Subround(G, e1, a1, b1, c1, d1, X[ 9], 15, k1); 00157 Subround(G, d1, e1, a1, b1, c1, X[ 5], 9, k1); 00158 Subround(G, c1, d1, e1, a1, b1, X[ 2], 11, k1); 00159 Subround(G, b1, c1, d1, e1, a1, X[14], 7, k1); 00160 Subround(G, a1, b1, c1, d1, e1, X[11], 13, k1); 00161 Subround(G, e1, a1, b1, c1, d1, X[ 8], 12, k1); 00162 00163 Subround(H, d1, e1, a1, b1, c1, X[ 3], 11, k2); 00164 Subround(H, c1, d1, e1, a1, b1, X[10], 13, k2); 00165 Subround(H, b1, c1, d1, e1, a1, X[14], 6, k2); 00166 Subround(H, a1, b1, c1, d1, e1, X[ 4], 7, k2); 00167 Subround(H, e1, a1, b1, c1, d1, X[ 9], 14, k2); 00168 Subround(H, d1, e1, a1, b1, c1, X[15], 9, k2); 00169 Subround(H, c1, d1, e1, a1, b1, X[ 8], 13, k2); 00170 Subround(H, b1, c1, d1, e1, a1, X[ 1], 15, k2); 00171 Subround(H, a1, b1, c1, d1, e1, X[ 2], 14, k2); 00172 Subround(H, e1, a1, b1, c1, d1, X[ 7], 8, k2); 00173 Subround(H, d1, e1, a1, b1, c1, X[ 0], 13, k2); 00174 Subround(H, c1, d1, e1, a1, b1, X[ 6], 6, k2); 00175 Subround(H, b1, c1, d1, e1, a1, X[13], 5, k2); 00176 Subround(H, a1, b1, c1, d1, e1, X[11], 12, k2); 00177 Subround(H, e1, a1, b1, c1, d1, X[ 5], 7, k2); 00178 Subround(H, d1, e1, a1, b1, c1, X[12], 5, k2); 00179 00180 Subround(I, c1, d1, e1, a1, b1, X[ 1], 11, k3); 00181 Subround(I, b1, c1, d1, e1, a1, X[ 9], 12, k3); 00182 Subround(I, a1, b1, c1, d1, e1, X[11], 14, k3); 00183 Subround(I, e1, a1, b1, c1, d1, X[10], 15, k3); 00184 Subround(I, d1, e1, a1, b1, c1, X[ 0], 14, k3); 00185 Subround(I, c1, d1, e1, a1, b1, X[ 8], 15, k3); 00186 Subround(I, b1, c1, d1, e1, a1, X[12], 9, k3); 00187 Subround(I, a1, b1, c1, d1, e1, X[ 4], 8, k3); 00188 Subround(I, e1, a1, b1, c1, d1, X[13], 9, k3); 00189 Subround(I, d1, e1, a1, b1, c1, X[ 3], 14, k3); 00190 Subround(I, c1, d1, e1, a1, b1, X[ 7], 5, k3); 00191 Subround(I, b1, c1, d1, e1, a1, X[15], 6, k3); 00192 Subround(I, a1, b1, c1, d1, e1, X[14], 8, k3); 00193 Subround(I, e1, a1, b1, c1, d1, X[ 5], 6, k3); 00194 Subround(I, d1, e1, a1, b1, c1, X[ 6], 5, k3); 00195 Subround(I, c1, d1, e1, a1, b1, X[ 2], 12, k3); 00196 00197 Subround(J, b1, c1, d1, e1, a1, X[ 4], 9, k4); 00198 Subround(J, a1, b1, c1, d1, e1, X[ 0], 15, k4); 00199 Subround(J, e1, a1, b1, c1, d1, X[ 5], 5, k4); 00200 Subround(J, d1, e1, a1, b1, c1, X[ 9], 11, k4); 00201 Subround(J, c1, d1, e1, a1, b1, X[ 7], 6, k4); 00202 Subround(J, b1, c1, d1, e1, a1, X[12], 8, k4); 00203 Subround(J, a1, b1, c1, d1, e1, X[ 2], 13, k4); 00204 Subround(J, e1, a1, b1, c1, d1, X[10], 12, k4); 00205 Subround(J, d1, e1, a1, b1, c1, X[14], 5, k4); 00206 Subround(J, c1, d1, e1, a1, b1, X[ 1], 12, k4); 00207 Subround(J, b1, c1, d1, e1, a1, X[ 3], 13, k4); 00208 Subround(J, a1, b1, c1, d1, e1, X[ 8], 14, k4); 00209 Subround(J, e1, a1, b1, c1, d1, X[11], 11, k4); 00210 Subround(J, d1, e1, a1, b1, c1, X[ 6], 8, k4); 00211 Subround(J, c1, d1, e1, a1, b1, X[15], 5, k4); 00212 Subround(J, b1, c1, d1, e1, a1, X[13], 6, k4); 00213 00214 Subround(J, a2, b2, c2, d2, e2, X[ 5], 8, k5); 00215 Subround(J, e2, a2, b2, c2, d2, X[14], 9, k5); 00216 Subround(J, d2, e2, a2, b2, c2, X[ 7], 9, k5); 00217 Subround(J, c2, d2, e2, a2, b2, X[ 0], 11, k5); 00218 Subround(J, b2, c2, d2, e2, a2, X[ 9], 13, k5); 00219 Subround(J, a2, b2, c2, d2, e2, X[ 2], 15, k5); 00220 Subround(J, e2, a2, b2, c2, d2, X[11], 15, k5); 00221 Subround(J, d2, e2, a2, b2, c2, X[ 4], 5, k5); 00222 Subround(J, c2, d2, e2, a2, b2, X[13], 7, k5); 00223 Subround(J, b2, c2, d2, e2, a2, X[ 6], 7, k5); 00224 Subround(J, a2, b2, c2, d2, e2, X[15], 8, k5); 00225 Subround(J, e2, a2, b2, c2, d2, X[ 8], 11, k5); 00226 Subround(J, d2, e2, a2, b2, c2, X[ 1], 14, k5); 00227 Subround(J, c2, d2, e2, a2, b2, X[10], 14, k5); 00228 Subround(J, b2, c2, d2, e2, a2, X[ 3], 12, k5); 00229 Subround(J, a2, b2, c2, d2, e2, X[12], 6, k5); 00230 00231 Subround(I, e2, a2, b2, c2, d2, X[ 6], 9, k6); 00232 Subround(I, d2, e2, a2, b2, c2, X[11], 13, k6); 00233 Subround(I, c2, d2, e2, a2, b2, X[ 3], 15, k6); 00234 Subround(I, b2, c2, d2, e2, a2, X[ 7], 7, k6); 00235 Subround(I, a2, b2, c2, d2, e2, X[ 0], 12, k6); 00236 Subround(I, e2, a2, b2, c2, d2, X[13], 8, k6); 00237 Subround(I, d2, e2, a2, b2, c2, X[ 5], 9, k6); 00238 Subround(I, c2, d2, e2, a2, b2, X[10], 11, k6); 00239 Subround(I, b2, c2, d2, e2, a2, X[14], 7, k6); 00240 Subround(I, a2, b2, c2, d2, e2, X[15], 7, k6); 00241 Subround(I, e2, a2, b2, c2, d2, X[ 8], 12, k6); 00242 Subround(I, d2, e2, a2, b2, c2, X[12], 7, k6); 00243 Subround(I, c2, d2, e2, a2, b2, X[ 4], 6, k6); 00244 Subround(I, b2, c2, d2, e2, a2, X[ 9], 15, k6); 00245 Subround(I, a2, b2, c2, d2, e2, X[ 1], 13, k6); 00246 Subround(I, e2, a2, b2, c2, d2, X[ 2], 11, k6); 00247 00248 Subround(H, d2, e2, a2, b2, c2, X[15], 9, k7); 00249 Subround(H, c2, d2, e2, a2, b2, X[ 5], 7, k7); 00250 Subround(H, b2, c2, d2, e2, a2, X[ 1], 15, k7); 00251 Subround(H, a2, b2, c2, d2, e2, X[ 3], 11, k7); 00252 Subround(H, e2, a2, b2, c2, d2, X[ 7], 8, k7); 00253 Subround(H, d2, e2, a2, b2, c2, X[14], 6, k7); 00254 Subround(H, c2, d2, e2, a2, b2, X[ 6], 6, k7); 00255 Subround(H, b2, c2, d2, e2, a2, X[ 9], 14, k7); 00256 Subround(H, a2, b2, c2, d2, e2, X[11], 12, k7); 00257 Subround(H, e2, a2, b2, c2, d2, X[ 8], 13, k7); 00258 Subround(H, d2, e2, a2, b2, c2, X[12], 5, k7); 00259 Subround(H, c2, d2, e2, a2, b2, X[ 2], 14, k7); 00260 Subround(H, b2, c2, d2, e2, a2, X[10], 13, k7); 00261 Subround(H, a2, b2, c2, d2, e2, X[ 0], 13, k7); 00262 Subround(H, e2, a2, b2, c2, d2, X[ 4], 7, k7); 00263 Subround(H, d2, e2, a2, b2, c2, X[13], 5, k7); 00264 00265 Subround(G, c2, d2, e2, a2, b2, X[ 8], 15, k8); 00266 Subround(G, b2, c2, d2, e2, a2, X[ 6], 5, k8); 00267 Subround(G, a2, b2, c2, d2, e2, X[ 4], 8, k8); 00268 Subround(G, e2, a2, b2, c2, d2, X[ 1], 11, k8); 00269 Subround(G, d2, e2, a2, b2, c2, X[ 3], 14, k8); 00270 Subround(G, c2, d2, e2, a2, b2, X[11], 14, k8); 00271 Subround(G, b2, c2, d2, e2, a2, X[15], 6, k8); 00272 Subround(G, a2, b2, c2, d2, e2, X[ 0], 14, k8); 00273 Subround(G, e2, a2, b2, c2, d2, X[ 5], 6, k8); 00274 Subround(G, d2, e2, a2, b2, c2, X[12], 9, k8); 00275 Subround(G, c2, d2, e2, a2, b2, X[ 2], 12, k8); 00276 Subround(G, b2, c2, d2, e2, a2, X[13], 9, k8); 00277 Subround(G, a2, b2, c2, d2, e2, X[ 9], 12, k8); 00278 Subround(G, e2, a2, b2, c2, d2, X[ 7], 5, k8); 00279 Subround(G, d2, e2, a2, b2, c2, X[10], 15, k8); 00280 Subround(G, c2, d2, e2, a2, b2, X[14], 8, k8); 00281 00282 Subround(F, b2, c2, d2, e2, a2, X[12], 8, k9); 00283 Subround(F, a2, b2, c2, d2, e2, X[15], 5, k9); 00284 Subround(F, e2, a2, b2, c2, d2, X[10], 12, k9); 00285 Subround(F, d2, e2, a2, b2, c2, X[ 4], 9, k9); 00286 Subround(F, c2, d2, e2, a2, b2, X[ 1], 12, k9); 00287 Subround(F, b2, c2, d2, e2, a2, X[ 5], 5, k9); 00288 Subround(F, a2, b2, c2, d2, e2, X[ 8], 14, k9); 00289 Subround(F, e2, a2, b2, c2, d2, X[ 7], 6, k9); 00290 Subround(F, d2, e2, a2, b2, c2, X[ 6], 8, k9); 00291 Subround(F, c2, d2, e2, a2, b2, X[ 2], 13, k9); 00292 Subround(F, b2, c2, d2, e2, a2, X[13], 6, k9); 00293 Subround(F, a2, b2, c2, d2, e2, X[14], 5, k9); 00294 Subround(F, e2, a2, b2, c2, d2, X[ 0], 15, k9); 00295 Subround(F, d2, e2, a2, b2, c2, X[ 3], 13, k9); 00296 Subround(F, c2, d2, e2, a2, b2, X[ 9], 11, k9); 00297 Subround(F, b2, c2, d2, e2, a2, X[11], 11, k9); 00298 00299 a1 -= trackA[0]; 00300 b1 -= trackA[1]; 00301 c1 -= trackA[2]; 00302 d1 -= trackA[3]; 00303 e1 -= trackA[4]; 00304 a2 -= trackB[0]; 00305 b2 -= trackB[1]; 00306 c2 -= trackB[2]; 00307 d2 -= trackB[3]; 00308 e2 -= trackB[4]; 00309 00310 if (!last) 00311 { 00312 trackA[0] = (b1 + e1) - d2; 00313 trackA[1] = c1 - e2; 00314 trackA[2] = d1 - a2; 00315 trackA[3] = e1 - b2; 00316 trackA[4] = a1 - c2; 00317 trackB[0] = d1 - e2; 00318 trackB[1] = (e1 + c1) - a2; 00319 trackB[2] = a1 - b2; 00320 trackB[3] = b1 - c2; 00321 trackB[4] = c1 - d2; 00322 } 00323 else 00324 { 00325 trackB[0] = a2 - a1; 00326 trackB[1] = b2 - b1; 00327 trackB[2] = c2 - c1; 00328 trackB[3] = d2 - d1; 00329 trackB[4] = e2 - e1; 00330 trackA[0] = 0; 00331 trackA[1] = 0; 00332 trackA[2] = 0; 00333 trackA[3] = 0; 00334 trackA[4] = 0; 00335 } 00336 } 00337 00338 NAMESPACE_END

Generated on Wed Jul 21 19:15:35 2004 for Crypto++ by doxygen 1.3.7-20040704