C++使用AES+Base64算法对文本进行加密

使用AES算法和Base64实现具体的文本加密。

采用AES算法的CBC模式，16位秘钥，PKCS7Padding填充方案对文本进行加解密。此方案可防止一些比较关键的文本暴露，也可以用于服务器通信间的加密，防止通信协议和信息的泄露。

Main.cpp

#include <iostream>#include "AES.h"#include "Base64.h"using namespace std;const char g_key[17] = "asdfwetyhjuytrfd";const char g_iv[17] = "gfdertfghjkuyrtg";string EncryptionAES(const string& strSrc) //AES加密{size_t length = strSrc.length();int block_num = length / BLOCK_SIZE + 1;//明文char* szDataIn = new char[block_num * BLOCK_SIZE + 1];memset(szDataIn, 0x00, block_num * BLOCK_SIZE + 1);strcpy(szDataIn, strSrc.c_str());//进行PKCS7Padding填充。int k = length % BLOCK_SIZE;int j = length / BLOCK_SIZE;int padding = BLOCK_SIZE - k;for (int i = 0; i < padding; i++){szDataIn[j * BLOCK_SIZE + k + i] = padding;}szDataIn[block_num * BLOCK_SIZE] = '\0';//加密后的密文char *szDataOut = new char[block_num * BLOCK_SIZE + 1];memset(szDataOut, 0, block_num * BLOCK_SIZE + 1);//进行进行AES的CBC模式加密AES aes;aes.MakeKey(g_key, g_iv, 16, 16);aes.Encrypt(szDataIn, szDataOut, block_num * BLOCK_SIZE, AES::CBC);string str = base64_encode((unsigned char*) szDataOut,block_num * BLOCK_SIZE);delete[] szDataIn;delete[] szDataOut;return str;}string DecryptionAES(const string& strSrc) //AES解密{string strData = base64_decode(strSrc);size_t length = strData.length();//密文char *szDataIn = new char[length + 1];memcpy(szDataIn, strData.c_str(), length+1);//明文char *szDataOut = new char[length + 1];memcpy(szDataOut, strData.c_str(), length+1);//进行AES的CBC模式解密AES aes;aes.MakeKey(g_key, g_iv, 16, 16);aes.Decrypt(szDataIn, szDataOut, length, AES::CBC);//去PKCS7Padding填充if (0x00 < szDataOut[length - 1] <= 0x16){int tmp = szDataOut[length - 1];for (int i = length - 1; i >= length - tmp; i--){if (szDataOut[i] != tmp){memset(szDataOut, 0, length);cout << "去填充失败！解密出错！！" << endl;break;}elseszDataOut[i] = 0;}}string strDest(szDataOut);delete[] szDataIn;delete[] szDataOut;return strDest;}int main(int argc, char **argv){string str1 = "qwertyuisfdlsajdxcvnkhsakfh1332487";cout << "加密前:" << str1 << endl;string str2 = EncryptionAES(str1);cout << "加密后:" << str2 << endl;string str3 = DecryptionAES(str2);cout << "解密后:" << str3 << endl;}

AES算法的C++实现

AES.h

//AES.h#ifndef _AES_H#define _AES_H#include <exception>#include <cstring>#include <string>#define BLOCK_SIZE 16using namespace std;class AES{public:enum{ECB = 0, CBC = 1, CFB = 2};private:enum{DEFAULT_BLOCK_SIZE = 16};enum{MAX_BLOCK_SIZE = 32, MAX_ROUNDS = 14, MAX_KC = 8, MAX_BC = 8};public:AES();virtual ~AES();private://Key Initialization Flagbool m_bKeyInit;//Encryption (m_Ke) round keyint m_Ke[MAX_ROUNDS + 1][MAX_BC];//Decryption (m_Kd) round keyint m_Kd[MAX_ROUNDS + 1][MAX_BC];//Key Lengthint m_keylength;//Block Sizeint m_blockSize;//Number of Roundsint m_iROUNDS;//Chain Blockchar m_chain0[MAX_BLOCK_SIZE];char m_chain[MAX_BLOCK_SIZE];//Auxiliary private use buffersint tk[MAX_KC];int a[MAX_BC];int t[MAX_BC];private:void Xor(char* buff, char const* chain);void DefEncryptBlock(char const* in, char* result);void DefDecryptBlock(char const* in, char* result);void EncryptBlock(char const* in, char* result);void DecryptBlock(char const* in, char* result);public:void MakeKey(char const* key, char const* chain, int keylength =DEFAULT_BLOCK_SIZE, int blockSize = DEFAULT_BLOCK_SIZE);void Encrypt(char const* in, char* result, size_t n, int iMode = ECB);void Decrypt(char const* in, char* result, size_t n, int iMode = ECB);};#endif // __RIJNDAEL_H__

AES.cpp

#include <cstring>#include <exception>#include "AES.h"#include <iostream>using namespace std;const int sm_alog[256] ={ 1, 3, 5, 15, 17, 51, 85, 255, 26, 46, 114, 150, 161, 248, 19, 53, 95, 225, 56,72, 216, 115, 149, 164, 247, 2, 6, 10, 30, 34, 102, 170, 229, 52, 92,228, 55, 89, 235, 38, 106, 190, 217, 112, 144, 171, 230, 49, 83, 245, 4,12, 20, 60, 68, 204, 79, 209, 104, 184, 211, 110, 178, 205, 76, 212,103, 169, 224, 59, 77, 215, 98, 166, 241, 8, 24, 40, 120, 136, 131, 158,185, 208, 107, 189, 220, 127, 129, 152, 179, 206, 73, 219, 118, 154,181, 196, 87, 249, 16, 48, 80, 240, 11, 29, 39, 105, 187, 214, 97, 163,254, 25, 43, 125, 135, 146, 173, 236, 47, 113, 147, 174, 233, 32, 96,160, 251, 22, 58, 78, 210, 109, 183, 194, 93, 231, 50, 86, 250, 21, 63,65, 195, 94, 226, 61, 71, 201, 64, 192, 91, 237, 44, 116, 156, 191, 218,117, 159, 186, 213, 100, 172, 239, 42, 126, 130, 157, 188, 223, 122,142, 137, 128, 155, 182, 193, 88, 232, 35, 101, 175, 234, 37, 111, 177,200, 67, 197, 84, 252, 31, 33, 99, 165, 244, 7, 9, 27, 45, 119, 153,176, 203, 70, 202, 69, 207, 74, 222, 121, 139, 134, 145, 168, 227, 62,66, 198, 81, 243, 14, 18, 54, 90, 238, 41, 123, 141, 140, 143, 138, 133,148, 167, 242, 13, 23, 57, 75, 221, 124, 132, 151, 162, 253, 28, 36,108, 180, 199, 82, 246, 1 };const int sm_log[256] ={ 0, 0, 25, 1, 50, 2, 26, 198, 75, 199, 27, 104, 51, 238, 223, 3, 100, 4, 224,14, 52, 141, 129, 239, 76, 113, 8, 200, 248, 105, 28, 193, 125, 194, 29,181, 249, 185, 39, 106, 77, 228, 166, 114, 154, 201, 9, 120, 101, 47,138, 5, 33, 15, 225, 36, 18, 240, 130, 69, 53, 147, 218, 142, 150, 143,219, 189, 54, 208, 206, 148, 19, 92, 210, 241, 64, 70, 131, 56, 102,221, 253, 48, 191, 6, 139, 98, 179, 37, 226, 152, 34, 136, 145, 16, 126,110, 72, 195, 163, 182, 30, 66, 58, 107, 40, 84, 250, 133, 61, 186, 43,121, 10, 21, 155, 159, 94, 202, 78, 212, 172, 229, 243, 115, 167, 87,175, 88, 168, 80, 244, 234, 214, 116, 79, 174, 233, 213, 231, 230, 173,232, 44, 215, 117, 122, 235, 22, 11, 245, 89, 203, 95, 176, 156, 169,81, 160, 127, 12, 246, 111, 23, 196, 73, 236, 216, 67, 31, 45, 164, 118,123, 183, 204, 187, 62, 90, 251, 96, 177, 134, 59, 82, 161, 108, 170,85, 41, 157, 151, 178, 135, 144, 97, 190, 220, 252, 188, 149, 207, 205,55, 63, 91, 209, 83, 57, 132, 60, 65, 162, 109, 71, 20, 42, 158, 93, 86,242, 211, 171, 68, 17, 146, 217, 35, 32, 46, 137, 180, 124, 184, 38,119, 153, 227, 165, 103, 74, 237, 222, 197, 49, 254, 24, 13, 99, 140,128, 192, 247, 112, 7 };const char sm_S[256] ={ 99, 124, 119, 123, -14, 107, 111, -59, 48, 1, 103, 43, -2, -41, -85, 118, -54,-126, -55, 125, -6, 89, 71, -16, -83, -44, -94, -81, -100, -92, 114,-64, -73, -3, -109, 38, 54, 63, -9, -52, 52, -91, -27, -15, 113, -40,49, 21, 4, -57, 35, -61, 24, -106, 5, -102, 7, 18, -128, -30, -21, 39,-78, 117, 9, -125, 44, 26, 27, 110, 90, -96, 82, 59, -42, -77, 41, -29,47, -124, 83, -47, 0, -19, 32, -4, -79, 91, 106, -53, -66, 57, 74, 76,88, -49, -48, -17, -86, -5, 67, 77, 51, -123, 69, -7, 2, 127, 80, 60,-97, -88, 81, -93, 64, -113, -110, -99, 56, -11, -68, -74, -38, 33, 16,-1, -13, -46, -51, 12, 19, -20, 95, -105, 68, 23, -60, -89, 126, 61,100, 93, 25, 115, 96, -127, 79, -36, 34, 42, -112, -120, 70, -18, -72,20, -34, 94, 11, -37, -32, 50, 58, 10, 73, 6, 36, 92, -62, -45, -84, 98,-111, -107, -28, 121, -25, -56, 55, 109, -115, -43, 78, -87, 108, 86,-12, -22, 101, 122, -82, 8, -70, 120, 37, 46, 28, -90, -76, -58, -24,-35, 116, 31, 75, -67, -117, -118, 112, 62, -75, 102, 72, 3, -10, 14,97, 53, 87, -71, -122, -63, 29, -98, -31, -8, -104, 17, 105, -39, -114,-108, -101, 30, -121, -23, -50, 85, 40, -33, -116, -95, -119, 13, -65,-26, 66, 104, 65, -103, 45, 15, -80, 84, -69, 22 };const char sm_Si[256] ={ 82, 9, 106, -43, 48, 54, -91, 56, -65, 64, -93, -98, -127, -13, -41, -5, 124,-29, 57, -126, -101, 47, -1, -121, 52, -114, 67, 68, -60, -34, -23, -53,84, 123, -108, 50, -90, -62, 35, 61, -18, 76, -107, 11, 66, -6, -61, 78,8, 46, -95, 102, 40, -39, 36, -78, 118, 91, -94, 73, 109, -117, -47, 37,114, -8, -10, 100, -122, 104, -104, 22, -44, -92, 92, -52, 93, 101, -74,-110, 108, 112, 72, 80, -3, -19, -71, -38, 94, 21, 70, 87, -89, -115,-99, -124, -112, -40, -85, 0, -116, -68, -45, 10, -9, -28, 88, 5, -72,-77, 69, 6, -48, 44, 30, -113, -54, 63, 15, 2, -63, -81, -67, 3, 1, 19,-118, 107, 58, -111, 17, 65, 79, 103, -36, -22, -105, -14, -49, -50,-16, -76, -26, 115, -106, -84, 116, 34, -25, -83, 53, -123, -30, -7, 55,-24, 28, 117, -33, 110, 71, -15, 26, 113, 29, 41, -59, -119, 111, -73,98, 14, -86, 24, -66, 27, -4, 86, 62, 75, -58, -46, 121, 32, -102, -37,-64, -2, 120, -51, 90, -12, 31, -35, -88, 51, -120, 7, -57, 49, -79, 18,16, 89, 39, -128, -20, 95, 96, 81, 127, -87, 25, -75, 74, 13, 45, -27,122, -97, -109, -55, -100, -17, -96, -32, 59, 77, -82, 42, -11, -80,-56, -21, -69, 60, -125, 83, -103, 97, 23, 43, 4, 126, -70, 119, -42,38, -31, 105, 20, 99, 85, 33, 12, 125 };const int sm_T1[256] ={ -966564955, -126059388, -294160487, -159679603, -855539, -697603139,-563122255, -1849309868, 1613770832, 33620227, -832084055, 1445669757,-402719207, -1244145822, 1303096294, -327780710, -1882535355, 528646813,-1983264448, -92439161, -268764651, -1302767125, -1907931191, -68095989,1101901292, -1277897625, 1604494077, 1169141738, 597466303, 1403299063,-462261610, -1681866661, 1974974402, -503448292, 1033081774, 1277568618,1815492186, 2118074177, -168298750, -2083730353, 1748251740, 1369810420,-773462732, -101584632, -495881837, -1411852173, 1647391059, 706024767,134480908, -1782069422, 1176707941, -1648114850, 806885416, 932615841,168101135, 798661301, 235341577, 605164086, 461406363, -538779075,-840176858, 1311188841, 2142417613, -361400929, 302582043, 495158174,1479289972, 874125870, 907746093, -596742478, -1269146898, 1537253627,-1538108682, 1983593293, -1210657183, 2108928974, 1378429307,-572267714, 1580150641, 327451799, -1504488459, -1177431704, 0,-1041371860, 1075847264, -469959649, 2041688520, -1235526675,-731223362, -1916023994, 1740553945, 1916352843, -1807070498,-1739830060, -1336387352, -2049978550, -1143943061, -974131414,1336584933, -302253290, -2042412091, -1706209833, 1714631509, 293963156,-1975171633, -369493744, 67240454, -25198719, -1605349136, 2017213508,631218106, 1269344483, -1571728909, 1571005438, -2143272768, 93294474,1066570413, 563977660, 1882732616, -235539196, 1673313503, 2008463041,-1344611723, 1109467491, 537923632, -436207846, -34344178, -1076702611,-2117218996, 403442708, 638784309, -1007883217, -1101045791, 899127202,-2008791860, 773265209, -1815821225, 1437050866, -58818942, 2050833735,-932944724, -1168286233, 840505643, -428641387, -1067425632, 427917720,-1638969391, -1545806721, 1143087718, 1412049534, 999329963, 193497219,-1941551414, -940642775, 1807268051, 672404540, -1478566279,-1134666014, 369822493, -1378100362, -606019525, 1681011286, 1949973070,336202270, -1840690725, 201721354, 1210328172, -1201906460, -1614626211,-1110191250, 1135389935, -1000185178, 965841320, 831886756, -739974089,-226920053, -706222286, -1949775805, 1849112409, -630362697, 26054028,-1311386268, -1672589614, 1235855840, -663982924, -1403627782,-202050553, -806688219, -899324497, -193299826, 1202630377, 268961816,1874508501, -260540280, 1243948399, 1546530418, 941366308, 1470539505,1941222599, -1748580783, -873928669, -1579295364, -395021156,1042226977, -1773450275, 1639824860, 227249030, 260737669, -529502064,2084453954, 1907733956, -865704278, -1874310952, 100860677, -134810111,470683154, -1033805405, 1781871967, -1370007559, 1773779408, 394692241,-1715355304, 974986535, 664706745, -639508168, -336005101, 731420851,571543859, -764843589, -1445340816, 126783113, 865375399, 765172662,1008606754, 361203602, -907417312, -2016489911, -1437248001, 1344809080,-1512054918, 59542671, 1503764984, 160008576, 437062935, 1707065306,-672733647, -2076032314, -798463816, -2109652541, 697932208, 1512910199,504303377, 2075177163, -1470868228, 1841019862, 739644986 };const int sm_T2[256] ={ -1513725085, -2064089988, -1712425097, -1913226373, 234877682, -1110021269,-1310822545, 1418839493, 1348481072, 50462977, -1446090905, 2102799147,434634494, 1656084439, -431117397, -1695779210, 1167051466, -1658879358,1082771913, -2013627011, 368048890, -340633255, -913422521, 201060592,-331240019, 1739838676, -44064094, -364531793, -1088185188, -145513308,-1763413390, 1536934080, -1032472649, 484572669, -1371696237,1783375398, 1517041206, 1098792767, 49674231, 1334037708, 1550332980,-195975771, 886171109, 150598129, -1813876367, 1940642008, 1398944049,1059722517, 201851908, 1385547719, 1699095331, 1587397571, 674240536,-1590192490, 252314885, -1255171430, 151914247, 908333586, -1692696448,1038082786, 651029483, 1766729511, -847269198, -1612024459, 454166793,-1642232957, 1951935532, 775166490, 758520603, -1294176658, -290170278,-77881184, -157003182, 1299594043, 1639438038, -830622797, 2068982057,1054729187, 1901997871, -1760328572, -173649069, 1757008337, 0,750906861, 1614815264, 535035132, -931548751, -306816165, -1093375382,1183697867, -647512386, 1265776953, -560706998, -728216500, -391096232,1250283471, 1807470800, 717615087, -447763798, 384695291, -981056701,-677753523, 1432761139, -1810791035, -813021883, 283769337, 100925954,-2114027649, -257929136, 1148730428, -1171939425, -481580888,-207466159, -27417693, -1065336768, -1979347057, -1388342638,-1138647651, 1215313976, 82966005, -547111748, -1049119050, 1974459098,1665278241, 807407632, 451280895, 251524083, 1841287890, 1283575245,337120268, 891687699, 801369324, -507617441, -1573546089, -863484860,959321879, 1469301956, -229267545, -2097381762, 1199193405, -1396153244,-407216803, 724703513, -1780059277, -1598005152, -1743158911,-778154161, 2141445340, 1715741218, 2119445034, -1422159728,-2096396152, -896776634, 700968686, -747915080, 1009259540, 2041044702,-490971554, 487983883, 1991105499, 1004265696, 1449407026, 1316239930,504629770, -611169975, 168560134, 1816667172, -457679780, 1570751170,1857934291, -280777556, -1497079198, -1472622191, -1540254315,936633572, -1947043463, 852879335, 1133234376, 1500395319, -1210421907,-1946055283, 1689376213, -761508274, -532043351, -1260884884, -89369002,133428468, 634383082, -1345690267, -1896580486, -381178194, 403703816,-714097990, -1997506440, 1867130149, 1918643758, 607656988, -245913946,-948718412, 1368901318, 600565992, 2090982877, -1662487436, 557719327,-577352885, -597574211, -2045932661, -2062579062, -1864339344,1115438654, -999180875, -1429445018, -661632952, 84280067, 33027830,303828494, -1547542175, 1600795957, -106014889, -798377543, -1860729210,1486471617, 658119965, -1188585826, 953803233, 334231800, -1288988520,857870609, -1143838359, 1890179545, -1995993458, -1489791852,-1238525029, 574365214, -1844082809, 550103529, 1233637070, -5614251,2018519080, 2057691103, -1895592820, -128343647, -2146858615, 387583245,-630865985, 836232934, -964410814, -1194301336, -1014873791,-1339450983, 2002398509, 287182607, -881086288, -56077228, -697451589,975967766 };const int sm_T3[256] ={ 1671808611, 2089089148, 2006576759, 2072901243, -233963534, 1807603307,1873927791, -984313403, 810573872, 16974337, 1739181671, 729634347,-31856642, -681396777, -1410970197, 1989864566, -901410870, -2103631998,-918517303, 2106063485, -99225606, 1508618841, 1204391495, -267650064,-1377025619, -731401260, -1560453214, -1343601233, -1665195108,-1527295068, 1922491506, -1067738176, -1211992649, -48438787,-1817297517, 644500518, 911895606, 1061256767, -150800905, -867204148,878471220, -1510714971, -449523227, -251069967, 1905517169, -663508008,827548209, 356461077, 67897348, -950889017, 593839651, -1017209405,405286936, -1767819370, 84871685, -1699401830, 118033927, 305538066,-2137318528, -499261470, -349778453, 661212711, -1295155278, 1973414517,152769033, -2086789757, 745822252, 439235610, 455947803, 1857215598,1525593178, -1594139744, 1391895634, 994932283, -698239018, -1278313037,695947817, -482419229, 795958831, -2070473852, 1408607827, -781665839,0, -315833875, 543178784, -65018884, -1312261711, 1542305371,1790891114, -884568629, -1093048386, 961245753, 1256100938, 1289001036,1491644504, -817199665, -798245936, -282409489, -1427812438, -82383365,1137018435, 1305975373, 861234739, -2053893755, 1171229253, -116332039,33948674, 2139225727, 1357946960, 1011120188, -1615190625, -1461498968,1374921297, -1543610973, 1086357568, -1886780017, -1834139758,-1648615011, 944271416, -184225291, -1126210628, -1228834890,-629821478, 560153121, 271589392, -15014401, -217121293, -764559406,-850624051, 202643468, 322250259, -332413972, 1608629855, -1750977129,1154254916, 389623319, -1000893500, -1477290585, 2122513534, 1028094525,1689045092, 1575467613, 422261273, 1939203699, 1621147744, -2120738431,1339137615, -595614756, 577127458, 712922154, -1867826288, -2004677752,1187679302, -299251730, -1194103880, 339486740, -562452514, 1591917662,186455563, -612979237, -532948000, 844522546, 978220090, 169743370,1239126601, 101321734, 611076132, 1558493276, -1034051646, -747717165,-1393605716, 1655096418, -1851246191, -1784401515, -466103324,2039214713, -416098841, -935097400, 928607799, 1840765549, -1920204403,-714821163, 1322425422, -1444918871, 1823791212, 1459268694, -200805388,-366620694, 1706019429, 2056189050, -1360443474, 135794696, -1160417350,2022240376, 628050469, 779246638, 472135708, -1494132826, -1261997132,-967731258, -400307224, -579034659, 1956440180, 522272287, 1272813131,-1109630531, -1954148981, -1970991222, 1888542832, 1044544574,-1245417035, 1722469478, 1222152264, 50660867, -167643146, 236067854,1638122081, 895445557, 1475980887, -1177523783, -2037311610,-1051158079, 489110045, -1632032866, -516367903, -132912136,-1733088360, 288563729, 1773916777, -646927911, -1903622258,-1800981612, -1682559589, 505560094, -2020469369, -383727127,-834041906, 1442818645, 678973480, -545610273, -1936784500, -1577559647,-1988097655, 219617805, -1076206145, -432941082, 1120306242, 1756942440,1103331905, -1716508263, 762796589, 252780047, -1328841808, 1425844308,-1143575109, 372911126 };const int sm_T4[256] ={ 1667474886, 2088535288, 2004326894, 2071694838, -219017729, 1802223062,1869591006, -976923503, 808472672, 16843522, 1734846926, 724270422,-16901657, -673750347, -1414797747, 1987484396, -892713585, -2105369313,-909557623, 2105378810, -84273681, 1499065266, 1195886990, -252703749,-1381110719, -724277325, -1566376609, -1347425723, -1667449053,-1532692653, 1920112356, -1061135461, -1212693899, -33743647,-1819038147, 640051788, 909531756, 1061110142, -134806795, -859025533,875846760, -1515850671, -437963567, -235861767, 1903268834, -656903253,825316194, 353713962, 67374088, -943238507, 589522246, -1010606435,404236336, -1768513225, 84217610, -1701137105, 117901582, 303183396,-2139055333, -488489505, -336910643, 656894286, -1296904833, 1970642922,151591698, -2088526307, 741110872, 437923380, 454765878, 1852748508,1515908788, -1600062629, 1381168804, 993742198, -690593353, -1280061827,690584402, -471646499, 791638366, -2071685357, 1398011302, -774805319,0, -303223615, 538992704, -50585629, -1313748871, 1532751286,1785380564, -875870579, -1094788761, 960056178, 1246420628, 1280103576,1482221744, -808498555, -791647301, -269538619, -1431640753, -67430675,1128514950, 1296947098, 859002214, -2054843375, 1162203018, -101117719,33687044, 2139062782, 1347481760, 1010582648, -1616922075, -1465326773,1364325282, -1549533603, 1077985408, -1886418427, -1835881153,-1650607071, 943212656, -168491791, -1128472733, -1229536905,-623217233, 555836226, 269496352, -58651, -202174723, -757961281,-842183551, 202118168, 320025894, -320065597, 1600119230, -1751670219,1145359496, 387397934, -993765485, -1482165675, 2122220284, 1027426170,1684319432, 1566435258, 421079858, 1936954854, 1616945344, -2122213351,1330631070, -589529181, 572679748, 707427924, -1869567173, -2004319477,1179044492, -286381625, -1195846805, 336870440, -555845209, 1583276732,185277718, -606374227, -522175525, 842159716, 976899700, 168435220,1229577106, 101059084, 606366792, 1549591736, -1027449441, -741118275,-1397952701, 1650632388, -1852725191, -1785355215, -454805549,2038008818, -404278571, -926399605, 926374254, 1835907034, -1920103423,-707435343, 1313788572, -1448484791, 1819063512, 1448540844, -185333773,-353753649, 1701162954, 2054852340, -1364268729, 134748176, -1162160785,2021165296, 623210314, 774795868, 471606328, -1499008681, -1263220877,-960081513, -387439669, -572687199, 1953799400, 522133822, 1263263126,-1111630751, -1953790451, -1970633457, 1886425312, 1044267644,-1246378895, 1718004428, 1212733584, 50529542, -151649801, 235803164,1633788866, 892690282, 1465383342, -1179004823, -2038001385,-1044293479, 488449850, -1633765081, -505333543, -117959701,-1734823125, 286339874, 1768537042, -640061271, -1903261433,-1802197197, -1684294099, 505291324, -2021158379, -370597687,-825341561, 1431699370, 673740880, -539002203, -1936945405, -1583220647,-1987477495, 218961690, -1077945755, -421121577, 1111672452, 1751693520,1094828930, -1717981143, 757954394, 252645662, -1330590853, 1414855848,-1145317779, 370555436 };const int sm_T5[256] ={ 1374988112, 2118214995, 437757123, 975658646, 1001089995, 530400753,-1392879445, 1273168787, 540080725, -1384747530, -1999866223,-184398811, 1340463100, -987051049, 641025152, -1251826801, -558802359,632953703, 1172967064, 1576976609, -1020300030, -2125664238,-1924753501, 1809054150, 59727847, 361929877, -1083344149, -1789765158,-725712083, 1484005843, 1239443753, -1899378620, 1975683434, -191989384,-1722270101, 666464733, -1092530250, -259478249, -920605594, 2110667444,1675577880, -451268222, -1756286112, 1649639237, -1318815776,-1150570876, -25059300, -116905068, 1883793496, -1891238631,-1797362553, 1383856311, -1418472669, 1917518562, -484470953,1716890410, -1293211641, 800440835, -2033878118, -751368027, 807962610,599762354, 33778362, -317291940, -1966138325, -1485196142, -217582864,1315562145, 1708848333, 101039829, -785096161, -995688822, 875451293,-1561111136, 92987698, -1527321739, 193195065, 1080094634, 1584504582,-1116860335, 1042385657, -1763899843, -583137874, 1306967366,-1856729675, 1908694277, 67556463, 1615861247, 429456164, -692196969,-1992277044, 1742315127, -1326955843, 126454664, -417768648, 2043211483,-1585706425, 2084704233, -125559095, 0, 159417987, 841739592, 504459436,1817866830, -49348613, 260388950, 1034867998, 908933415, 168810852,1750902305, -1688513327, 607530554, 202008497, -1822955761, -1259432238,463180190, -2134850225, 1641816226, 1517767529, 470948374, -493635062,-1063245083, 1008918595, 303765277, 235474187, -225720403, 766945465,337553864, 1475418501, -1351284916, -291906117, -1551933187, -150919521,1551037884, 1147550661, 1543208500, -1958532746, -886847780,-1225917336, -1192955549, -684598070, 1113818384, 328671808,-2067394272, -2058738563, -759480840, -1359400431, -953573011,496906059, -592301837, 226906860, 2009195472, 733156972, -1452230247,294930682, 1206477858, -1459843900, -1594867942, 1451044056, 573804783,-2025238841, -650587711, -1932877058, -1730933962, -1493859889,-1518674392, -625504730, 1068351396, 742039012, 1350078989, 1784663195,1417561698, -158526526, -1864845080, 775550814, -2101104651,-1621262146, 1775276924, 1876241833, -819653965, -928212677, 270040487,-392404114, -616842373, -853116919, 1851332852, -325404927, -2091935064,-426414491, -1426069890, 566021896, -283776794, -1159226407, 1248802510,-358676012, 699432150, 832877231, 708780849, -962227152, 899835584,1951317047, -58537306, -527380304, 866637845, -251357110, 1106041591,2144161806, 395441711, 1984812685, 1139781709, -861254316, -459930401,-1630423581, 1282050075, -1054072904, 1181045119, -1654724092, 25965917,-91786125, -83148498, -1285087910, -1831087534, -384805325, 1842759443,-1697160820, 933301370, 1509430414, -351060855, -827774994, -1218328267,-518199827, 2051518780, -1663901863, 1441952575, 404016761, 1942435775,1408749034, 1610459739, -549621996, 2017778566, -894438527, -1184316354,941896748, -1029488545, 371049330, -1126030068, 675039627, -15887039,967311729, 135050206, -659233636, 1683407248, 2076935265, -718096784,1215061108, -793225406 };const int sm_T6[256] ={ 1347548327, 1400783205, -1021700188, -1774573730, -885281941, -249586363,-1414727080, -1823743229, 1428173050, -156404115, -1853305738,636813900, -61872681, -674944309, -2144979644, -1883938141, 1239331162,1730525723, -1740248562, -513933632, 46346101, 310463728, -1551022441,-966011911, -419197089, -1793748324, -339776134, -627748263, 768917123,-749177823, 692707433, 1150208456, 1786102409, 2029293177, 1805211710,-584599183, -1229004465, 401639597, 1724457132, -1266823622, 409198410,-2098914767, 1620529459, 1164071807, -525245321, -2068091986, 486441376,-1795618773, 1483753576, 428819965, -2020286868, -1219331080, 598438867,-495826174, 1474502543, 711349675, 129166120, 53458370, -1702443653,-1512884472, -231724921, -1306280027, -1174273174, 1559041666,730517276, -1834518092, -252508174, -1588696606, -848962828, -721025602,533804130, -1966823682, -1657524653, -1599933611, 839224033, 1973745387,957055980, -1438621457, 106852767, 1371368976, -113368694, 1033297158,-1361232379, 1179510461, -1248766835, 91341917, 1862534868, -10465259,605657339, -1747534359, -863420349, 2003294622, -1112479678,-2012771957, 954669403, -612775698, 1201765386, -377732593, -906460130,0, -2096529274, 1211247597, -1407315600, 1315723890, -67301633,1443857720, 507358933, 657861945, 1678381017, 560487590, -778347692,975451694, -1324610969, 261314535, -759894378, -1642357871, 1333838021,-1570644960, 1767536459, 370938394, 182621114, -440360918, 1128014560,487725847, 185469197, -1376613433, -1188186456, -938205527, -2057834215,1286567175, -1141990947, -39616672, -1611202266, -1134791947,-985373125, 878443390, 1988838185, -590666810, 1756818940, 1673061617,-891866660, 272786309, 1075025698, 545572369, 2105887268, -120407235,296679730, 1841768865, 1260232239, -203640272, -334657966, -797457949,1814803222, -1716948807, -99511224, 575138148, -995558260, 446754879,-665420500, -282971248, -947435186, -1042728751, -24327518, 915985419,-811141759, 681933534, 651868046, -1539330625, -466863459, 223377554,-1687527476, 1649704518, -1024029421, -393160520, 1580087799,-175979601, -1096852096, 2087309459, -1452288723, -1278270190,1003007129, -1492117379, 1860738147, 2077965243, 164439672, -194094824,32283319, -1467789414, 1709610350, 2125135846, 136428751, -420538904,-642062437, -833982666, -722821367, -701910916, -1355701070, 824852259,818324884, -1070226842, 930369212, -1493400886, -1327460144, 355706840,1257309336, -146674470, 243256656, 790073846, -1921626666, 1296297904,1422699085, -538667516, -476130891, 457992840, -1195299809, 2135319889,77422314, 1560382517, 1945798516, 788204353, 1521706781, 1385356242,870912086, 325965383, -1936009375, 2050466060, -1906706412, -1981082820,-288446169, 901210569, -304014107, 1014646705, 1503449823, 1062597235,2031621326, -1082931401, -363595827, 1533017514, 350174575, -2038938405,-2117423117, 1052338372, 741876788, 1606591296, 1914052035, 213705253,-1960297399, 1107234197, 1899603969, -569897805, -1663519516,-1872472383, 1635502980, 1893020342, 1950903388, 1120974935 };const int sm_T7[256] ={ -1487908364, 1699970625, -1530717673, 1586903591, 1808481195, 1173430173,1487645946, 59984867, -95084496, 1844882806, 1989249228, 1277555970,-671330331, -875051734, 1149249077, -1550863006, 1514790577, 459744698,244860394, -1058972162, 1963115311, -267222708, -1750889146, -104436781,1608975247, -1667951214, 2062270317, 1507497298, -2094148418, 567498868,1764313568, -935031095, -1989511742, 2037970062, 1047239000, 1910319033,1337376481, -1390940024, -1402549984, 984907214, 1243112415, 830661914,861968209, 2135253587, 2011214180, -1367032981, -1608712575, 731183368,1750626376, -48656571, 1820824798, -122203525, -752637069, 48394827,-1890065633, -1423284651, 671593195, -1039978571, 2073724613, 145085239,-2014171096, -1515052097, 1790575107, -2107839210, 472615631,-1265457287, -219090169, -492745111, -187865638, -1093335547,1646252340, -24460122, 1402811438, 1436590835, -516815478, -344611594,-331805821, -274055072, -1626972559, 273792366, -1963377119, 104699613,95345982, -1119466010, -1917480620, 1560637892, -730921978, 369057872,-81520232, -375925059, 1137477952, -1636341799, 1119727848, -1954019447,1530455833, -287606328, 172466556, 266959938, 516552836, 0, -2038232704,-314035669, 1890328081, 1917742170, -262898, 945164165, -719438418,958871085, -647755249, -1507760036, 1423022939, 775562294, 1739656202,-418409641, -1764576018, -1851909221, -984645440, 547512796, 1265195639,437656594, -1173691757, 719700128, -532464606, 387781147, 218828297,-944901493, -1464259146, -1446505442, 428169201, 122466165, -574886247,1627235199, 648017665, -172204942, 1002783846, 2117360635, 695634755,-958608605, -60246291, -245122844, -590686415, -2062531997, 574624663,287343814, 612205898, 1039717051, 840019705, -1586641111, 793451934,821288114, 1391201670, -472877119, 376187827, -1181111952, 1224348052,1679968233, -1933268740, 1058709744, 752375421, -1863376333, 1321699145,-775825096, -1560376118, 188127444, -2117097739, -567761542,-1910056265, -1079754835, -1645990854, -1844621192, -862229921,1180849278, 331544205, -1192718120, -144822727, -1342864701,-2134991011, -1820562992, 766078933, 313773861, -1724135252, 2108100632,1668212892, -1149510853, 2013908262, 418672217, -1224610662,-1700232369, 1852171925, -427906305, -821550660, -387518699,-1680229657, 919489135, 164948639, 2094410160, -1297141340, 590424639,-1808742747, 1723872674, -1137216434, -895026046, -793714544,-669699161, -1739919100, -621329940, 1343127501, -164685935, -695372211,-1337113617, 1297403050, 81781910, -1243373871, -2011476886, 532201772,1367295589, -368796322, 895287692, 1953757831, 1093597963, 492483431,-766340389, 1446242576, 1192455638, 1636604631, 209336225, 344873464,1015671571, 669961897, -919226527, -437395172, -1321436601, -547775278,1933530610, -830924780, 935293895, -840281097, -1436852227, 1863638845,-611944380, -209597777, -1002522264, 875313188, 1080017571, -1015933411,621591778, 1233856572, -1790836979, 24197544, -1277294580, -459482956,-1047501738, -2073986101, -1234119374, 1551124588, 1463996600 };const int sm_T8[256] ={ -190361519, 1097159550, 396673818, 660510266, -1418998981, -1656360673,-94852180, -486304949, 821712160, 1986918061, -864644728, 38544885,-438830001, 718002117, 893681702, 1654886325, -1319482914, -1172609243,-368142267, -20913827, 796197571, 1290801793, 1184342925, -738605461,-1889540349, -1835231979, 1836772287, 1381620373, -1098699308,1948373848, -529979063, -909622130, -1031181707, -1904641804,1480485785, -1183720153, -514869570, -2001922064, 548169417, -835013507,-548792221, 439452389, 1362321559, 1400849762, 1685577905, 1806599355,-2120213250, 137073913, 1214797936, 1174215055, -563312748, 2079897426,1943217067, 1258480242, 529487843, 1437280870, -349698126, -1245576401,-981755258, 923313619, 679998000, -1079659997, 57326082, 377642221,-820237430, 2041877159, 133361907, 1776460110, -621490843, 96392454,878845905, -1493267772, 777231668, -212492126, -1964953083, -152341084,-2081670901, 1626319424, 1906247262, 1846563261, 562755902, -586793578,1040559837, -423803315, 1418573201, -1000536719, 114585348, 1343618912,-1728371687, -1108764714, 1078185097, -643926169, -398279248,-1987344377, 425408743, -923870343, 2081048481, 1108339068, -2078357000,0, -2138668279, 736970802, 292596766, 1517440620, 251657213,-2059905521, -1361764803, 758720310, 265905162, 1554391400, 1532285339,908999204, 174567692, 1474760595, -292105548, -1684955621, -1060810880,-601841055, 2001430874, 303699484, -1816524062, -1607801408, 585122620,454499602, 151849742, -1949848078, -1230456531, 514443284, -249985705,1963412655, -1713521682, 2137062819, 19308535, 1928707164, 1715193156,-75615141, 1126790795, 600235211, -302225226, -453942344, 836553431,1669664834, -1759363053, -971956092, 1243905413, -1153566510,-114159186, 698445255, -1641067747, -1305414692, -2041385971,-1042034569, -1290376149, 1891211689, -1807156719, -379313593,-57883480, -264299872, 2100090966, 865136418, 1229899655, 953270745,-895287668, -737462632, -176042074, 2061379749, -1215420710,-1379949505, 983426092, 2022837584, 1607244650, 2118541908, -1928084746,-658970480, 972512814, -1011878526, 1568718495, -795640727, -718427793,621982671, -1399243832, 410887952, -1671205144, 1002142683, 645401037,1494807662, -1699282452, 1335535747, -1787927066, -1671510, -1127282655,367585007, -409216582, 1865862730, -1626745622, -1333995991,-1531793615, 1059270954, -1517014842, -1570324427, 1320957812,-2100648196, -1865371424, -1479011021, 77089521, -321194175, -850391425,-1846137065, 1305906550, -273658557, -1437772596, -1778065436,-776608866, 1787304780, 740276417, 1699839814, 1592394909, -1942659839,-2022411270, 188821243, 1729977011, -606973294, 274084841, -699985043,-681472870, -1593017801, -132870567, 322734571, -1457000754, 1640576439,484830689, 1202797690, -757114468, -227328171, 349075736, -952647821,-137500077, -39167137, 1030690015, 1155237496, -1342996022, 1757691577,607398968, -1556062270, 499347990, -500888388, 1011452712, 227885567,-1476300487, 213114376, -1260086056, 1455525988, -880516741, 850817237,1817998408, -1202240816 };const int sm_U1[256] ={ 0, 235474187, 470948374, 303765277, 941896748, 908933415, 607530554,708780849, 1883793496, 2118214995, 1817866830, 1649639237, 1215061108,1181045119, 1417561698, 1517767529, -527380304, -291906117, -58537306,-225720403, -659233636, -692196969, -995688822, -894438527, -1864845080,-1630423581, -1932877058, -2101104651, -1459843900, -1493859889,-1259432238, -1159226407, -616842373, -718096784, -953573011,-920605594, -484470953, -317291940, -15887039, -251357110, -1418472669,-1518674392, -1218328267, -1184316354, -1822955761, -1654724092,-1891238631, -2125664238, 1001089995, 899835584, 666464733, 699432150,59727847, 226906860, 530400753, 294930682, 1273168787, 1172967064,1475418501, 1509430414, 1942435775, 2110667444, 1876241833, 1641816226,-1384747530, -1551933187, -1318815776, -1083344149, -1789765158,-1688513327, -1992277044, -2025238841, -583137874, -751368027,-1054072904, -819653965, -451268222, -351060855, -116905068, -150919521,1306967366, 1139781709, 1374988112, 1610459739, 1975683434, 2076935265,1775276924, 1742315127, 1034867998, 866637845, 566021896, 800440835,92987698, 193195065, 429456164, 395441711, 1984812685, 2017778566,1784663195, 1683407248, 1315562145, 1080094634, 1383856311, 1551037884,101039829, 135050206, 437757123, 337553864, 1042385657, 807962610,573804783, 742039012, -1763899843, -1730933962, -1966138325,-2067394272, -1359400431, -1594867942, -1293211641, -1126030068,-426414491, -392404114, -91786125, -191989384, -558802359, -793225406,-1029488545, -861254316, 1106041591, 1340463100, 1576976609, 1408749034,2043211483, 2009195472, 1708848333, 1809054150, 832877231, 1068351396,766945465, 599762354, 159417987, 126454664, 361929877, 463180190,-1585706425, -1351284916, -1116860335, -1285087910, -1722270101,-1756286112, -2058738563, -1958532746, -785096161, -549621996,-853116919, -1020300030, -384805325, -417768648, -184398811, -83148498,-1697160820, -1797362553, -2033878118, -1999866223, -1561111136,-1392879445, -1092530250, -1326955843, -358676012, -459930401,-158526526, -125559095, -759480840, -592301837, -827774994, -1063245083,2051518780, 1951317047, 1716890410, 1750902305, 1113818384, 1282050075,1584504582, 1350078989, 168810852, 67556463, 371049330, 404016761,841739592, 1008918595, 775550814, 540080725, -325404927, -493635062,-259478249, -25059300, -725712083, -625504730, -928212677, -962227152,-1663901863, -1831087534, -2134850225, -1899378620, -1527321739,-1426069890, -1192955549, -1225917336, 202008497, 33778362, 270040487,504459436, 875451293, 975658646, 675039627, 641025152, 2084704233,1917518562, 1615861247, 1851332852, 1147550661, 1248802510, 1484005843,1451044056, 933301370, 967311729, 733156972, 632953703, 260388950,25965917, 328671808, 496906059, 1206477858, 1239443753, 1543208500,1441952575, 2144161806, 1908694277, 1675577880, 1842759443, -684598070,-650587711, -886847780, -987051049, -283776794, -518199827, -217582864,-49348613, -1485196142, -1452230247, -1150570876, -1251826801,-1621262146, -1856729675, -2091935064, -1924753501 };const int sm_U2[256] ={ 0, 185469197, 370938394, 487725847, 741876788, 657861945, 975451694,824852259, 1483753576, 1400783205, 1315723890, 1164071807, 1950903388,2135319889, 1649704518, 1767536459, -1327460144, -1141990947,-1493400886, -1376613433, -1663519516, -1747534359, -1966823682,-2117423117, -393160520, -476130891, -24327518, -175979601, -995558260,-811141759, -759894378, -642062437, 2077965243, 1893020342, 1841768865,1724457132, 1474502543, 1559041666, 1107234197, 1257309336, 598438867,681933534, 901210569, 1052338372, 261314535, 77422314, 428819965,310463728, -885281941, -1070226842, -584599183, -701910916, -419197089,-334657966, -249586363, -99511224, -1823743229, -1740248562,-2057834215, -1906706412, -1082931401, -1266823622, -1452288723,-1570644960, -156404115, -39616672, -525245321, -339776134, -627748263,-778347692, -863420349, -947435186, -1361232379, -1512884472,-1195299809, -1278270190, -2098914767, -1981082820, -1795618773,-1611202266, 1179510461, 1296297904, 1347548327, 1533017514, 1786102409,1635502980, 2087309459, 2003294622, 507358933, 355706840, 136428751,53458370, 839224033, 957055980, 605657339, 790073846, -1921626666,-2038938405, -1687527476, -1872472383, -1588696606, -1438621457,-1219331080, -1134791947, -721025602, -569897805, -1021700188,-938205527, -113368694, -231724921, -282971248, -466863459, 1033297158,915985419, 730517276, 545572369, 296679730, 446754879, 129166120,213705253, 1709610350, 1860738147, 1945798516, 2029293177, 1239331162,1120974935, 1606591296, 1422699085, -146674470, -61872681, -513933632,-363595827, -612775698, -797457949, -848962828, -966011911, -1355701070,-1539330625, -1188186456, -1306280027, -2096529274, -2012771957,-1793748324, -1642357871, 1201765386, 1286567175, 1371368976,1521706781, 1805211710, 1620529459, 2105887268, 1988838185, 533804130,350174575, 164439672, 46346101, 870912086, 954669403, 636813900,788204353, -1936009375, -2020286868, -1702443653, -1853305738,-1599933611, -1414727080, -1229004465, -1112479678, -722821367,-538667516, -1024029421, -906460130, -120407235, -203640272, -288446169,-440360918, 1014646705, 930369212, 711349675, 560487590, 272786309,457992840, 106852767, 223377554, 1678381017, 1862534868, 1914052035,2031621326, 1211247597, 1128014560, 1580087799, 1428173050, 32283319,182621114, 401639597, 486441376, 768917123, 651868046, 1003007129,818324884, 1503449823, 1385356242, 1333838021, 1150208456, 1973745387,2125135846, 1673061617, 1756818940, -1324610969, -1174273174,-1492117379, -1407315600, -1657524653, -1774573730, -1960297399,-2144979644, -377732593, -495826174, -10465259, -194094824, -985373125,-833982666, -749177823, -665420500, 2050466060, 1899603969, 1814803222,1730525723, 1443857720, 1560382517, 1075025698, 1260232239, 575138148,692707433, 878443390, 1062597235, 243256656, 91341917, 409198410,325965383, -891866660, -1042728751, -590666810, -674944309, -420538904,-304014107, -252508174, -67301633, -1834518092, -1716948807,-2068091986, -1883938141, -1096852096, -1248766835, -1467789414,-1551022441, };const int sm_U3[256] ={ 0, 218828297, 437656594, 387781147, 875313188, 958871085, 775562294,590424639, 1750626376, 1699970625, 1917742170, 2135253587, 1551124588,1367295589, 1180849278, 1265195639, -793714544, -574886247, -895026046,-944901493, -459482956, -375925059, -24460122, -209597777, -1192718120,-1243373871, -1560376118, -1342864701, -1933268740, -2117097739,-1764576018, -1680229657, -1149510853, -1234119374, -1586641111,-1402549984, -1890065633, -2107839210, -1790836979, -1739919100,-752637069, -567761542, -919226527, -1002522264, -418409641, -368796322,-48656571, -267222708, 1808481195, 1723872674, 1910319033, 2094410160,1608975247, 1391201670, 1173430173, 1224348052, 59984867, 244860394,428169201, 344873464, 935293895, 984907214, 766078933, 547512796,1844882806, 1627235199, 2011214180, 2062270317, 1507497298, 1423022939,1137477952, 1321699145, 95345982, 145085239, 532201772, 313773861,830661914, 1015671571, 731183368, 648017665, -1119466010, -1337113617,-1487908364, -1436852227, -1989511742, -2073986101, -1820562992,-1636341799, -719438418, -669699161, -821550660, -1039978571,-516815478, -331805821, -81520232, -164685935, -695372211, -611944380,-862229921, -1047501738, -492745111, -274055072, -122203525, -172204942,-1093335547, -1277294580, -1530717673, -1446505442, -1963377119,-2014171096, -1863376333, -1645990854, 104699613, 188127444, 472615631,287343814, 840019705, 1058709744, 671593195, 621591778, 1852171925,1668212892, 1953757831, 2037970062, 1514790577, 1463996600, 1080017571,1297403050, -621329940, -671330331, -1058972162, -840281097, -287606328,-472877119, -187865638, -104436781, -1297141340, -1079754835,-1464259146, -1515052097, -2038232704, -1954019447, -1667951214,-1851909221, 172466556, 122466165, 273792366, 492483431, 1047239000,861968209, 612205898, 695634755, 1646252340, 1863638845, 2013908262,1963115311, 1446242576, 1530455833, 1277555970, 1093597963, 1636604631,1820824798, 2073724613, 1989249228, 1436590835, 1487645946, 1337376481,1119727848, 164948639, 81781910, 331544205, 516552836, 1039717051,821288114, 669961897, 719700128, -1321436601, -1137216434, -1423284651,-1507760036, -2062531997, -2011476886, -1626972559, -1844621192,-647755249, -730921978, -1015933411, -830924780, -314035669, -532464606,-144822727, -95084496, -1224610662, -1173691757, -1390940024,-1608712575, -2094148418, -1910056265, -1724135252, -1808742747,-547775278, -766340389, -984645440, -935031095, -344611594, -427906305,-245122844, -60246291, 1739656202, 1790575107, 2108100632, 1890328081,1402811438, 1586903591, 1233856572, 1149249077, 266959938, 48394827,369057872, 418672217, 1002783846, 919489135, 567498868, 752375421,209336225, 24197544, 376187827, 459744698, 945164165, 895287692,574624663, 793451934, 1679968233, 1764313568, 2117360635, 1933530610,1343127501, 1560637892, 1243112415, 1192455638, -590686415, -775825096,-958608605, -875051734, -387518699, -437395172, -219090169, -262898,-1265457287, -1181111952, -1367032981, -1550863006, -2134991011,-1917480620, -1700232369, -1750889146 };const int sm_U4[256] ={ 0, 151849742, 303699484, 454499602, 607398968, 758720310, 908999204,1059270954, 1214797936, 1097159550, 1517440620, 1400849762, 1817998408,1699839814, 2118541908, 2001430874, -1865371424, -1713521682,-2100648196, -1949848078, -1260086056, -1108764714, -1493267772,-1342996022, -658970480, -776608866, -895287668, -1011878526, -57883480,-176042074, -292105548, -409216582, 1002142683, 850817237, 698445255,548169417, 529487843, 377642221, 227885567, 77089521, 1943217067,2061379749, 1640576439, 1757691577, 1474760595, 1592394909, 1174215055,1290801793, -1418998981, -1570324427, -1183720153, -1333995991,-1889540349, -2041385971, -1656360673, -1807156719, -486304949,-368142267, -249985705, -132870567, -952647821, -835013507, -718427793,-601841055, 1986918061, 2137062819, 1685577905, 1836772287, 1381620373,1532285339, 1078185097, 1229899655, 1040559837, 923313619, 740276417,621982671, 439452389, 322734571, 137073913, 19308535, -423803315,-273658557, -190361519, -39167137, -1031181707, -880516741, -795640727,-643926169, -1361764803, -1479011021, -1127282655, -1245576401,-1964953083, -2081670901, -1728371687, -1846137065, 1305906550,1155237496, 1607244650, 1455525988, 1776460110, 1626319424, 2079897426,1928707164, 96392454, 213114376, 396673818, 514443284, 562755902,679998000, 865136418, 983426092, -586793578, -737462632, -820237430,-971956092, -114159186, -264299872, -349698126, -500888388, -1787927066,-1671205144, -2022411270, -1904641804, -1319482914, -1202240816,-1556062270, -1437772596, -321194175, -438830001, -20913827, -137500077,-923870343, -1042034569, -621490843, -738605461, -1531793615,-1379949505, -1230456531, -1079659997, -2138668279, -1987344377,-1835231979, -1684955621, 2081048481, 1963412655, 1846563261,1729977011, 1480485785, 1362321559, 1243905413, 1126790795, 878845905,1030690015, 645401037, 796197571, 274084841, 425408743, 38544885,188821243, -681472870, -563312748, -981755258, -864644728, -212492126,-94852180, -514869570, -398279248, -1626745622, -1778065436,-1928084746, -2078357000, -1153566510, -1305414692, -1457000754,-1607801408, 1202797690, 1320957812, 1437280870, 1554391400, 1669664834,1787304780, 1906247262, 2022837584, 265905162, 114585348, 499347990,349075736, 736970802, 585122620, 972512814, 821712160, -1699282452,-1816524062, -2001922064, -2120213250, -1098699308, -1215420710,-1399243832, -1517014842, -757114468, -606973294, -1060810880,-909622130, -152341084, -1671510, -453942344, -302225226, 174567692,57326082, 410887952, 292596766, 777231668, 660510266, 1011452712,893681702, 1108339068, 1258480242, 1343618912, 1494807662, 1715193156,1865862730, 1948373848, 2100090966, -1593017801, -1476300487,-1290376149, -1172609243, -2059905521, -1942659839, -1759363053,-1641067747, -379313593, -529979063, -75615141, -227328171, -850391425,-1000536719, -548792221, -699985043, 836553431, 953270745, 600235211,718002117, 367585007, 484830689, 133361907, 251657213, 2041877159,1891211689, 1806599355, 1654886325, 1568718495, 1418573201, 1335535747,1184342925 };const char sm_rcon[30] ={ 1, 2, 4, 8, 16, 32, 64, -128, 27, 54, 108, -40, -85, 77, -102, 47, 94, -68,99, -58, -105, 53, 106, -44, -77, 125, -6, -17, -59, -111 };const int sm_shifts[3][4][2] ={{{ 0, 0 },{ 1, 3 },{ 2, 2 },{ 3, 1 } },{{ 0, 0 },{ 1, 5 },{ 2, 4 },{ 3, 3 } },{{ 0, 0 },{ 1, 7 },{ 3, 5 },{ 4, 4 } } };//Error Messageschar const* sm_szErrorMsg1 = "Object not Initialized";char const* sm_szErrorMsg2 = "Data not multiple of Block Size";//Null chainchar const* sm_chain0 ="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";static int Mul(int a, int b){return (a != 0 && b != 0) ?sm_alog[(sm_log[a & 0xFF] + sm_log[b & 0xFF]) % 255] : 0;}//Convenience method used in generating Transposition Boxesstatic int Mul4(int a, char b[]){if (a == 0)return 0;a = sm_log[a & 0xFF];int a0 = (b[0] != 0) ? sm_alog[(a + sm_log[b[0] & 0xFF]) % 255] & 0xFF : 0;int a1 = (b[1] != 0) ? sm_alog[(a + sm_log[b[1] & 0xFF]) % 255] & 0xFF : 0;int a2 = (b[2] != 0) ? sm_alog[(a + sm_log[b[2] & 0xFF]) % 255] & 0xFF : 0;int a3 = (b[3] != 0) ? sm_alog[(a + sm_log[b[3] & 0xFF]) % 255] & 0xFF : 0;return a0 << 24 | a1 << 16 | a2 << 8 | a3;}//CONSTRUCTORAES::AES() :m_bKeyInit(false), m_keylength(0), m_blockSize(0), m_iROUNDS(0){}//DESTRUCTORAES::~AES(){}void AES::Xor(char* buff, char const* chain){if (false == m_bKeyInit)return;for (int i = 0; i < m_blockSize; i++)*(buff++) ^= *(chain++);}void AES::DefEncryptBlock(char const* in, char* result){if (false == m_bKeyInit)return;int* Ker = m_Ke[0];int t0 = ((unsigned char) *(in++) << 24);t0 |= ((unsigned char) *(in++) << 16);t0 |= ((unsigned char) *(in++) << 8);(t0 |= (unsigned char) *(in++)) ^= Ker[0];int t1 = ((unsigned char) *(in++) << 24);t1 |= ((unsigned char) *(in++) << 16);t1 |= ((unsigned char) *(in++) << 8);(t1 |= (unsigned char) *(in++)) ^= Ker[1];int t2 = ((unsigned char) *(in++) << 24);t2 |= ((unsigned char) *(in++) << 16);t2 |= ((unsigned char) *(in++) << 8);(t2 |= (unsigned char) *(in++)) ^= Ker[2];int t3 = ((unsigned char) *(in++) << 24);t3 |= ((unsigned char) *(in++) << 16);t3 |= ((unsigned char) *(in++) << 8);(t3 |= (unsigned char) *(in++)) ^= Ker[3];int a0, a1, a2, a3;//Apply Round Transformsfor (int r = 1; r < m_iROUNDS; r++){Ker = m_Ke[r];a0 = (sm_T1[(t0 >> 24) & 0xFF] ^ sm_T2[(t1 >> 16) & 0xFF]^ sm_T3[(t2 >> 8) & 0xFF] ^ sm_T4[t3 & 0xFF]) ^ Ker[0];a1 = (sm_T1[(t1 >> 24) & 0xFF] ^ sm_T2[(t2 >> 16) & 0xFF]^ sm_T3[(t3 >> 8) & 0xFF] ^ sm_T4[t0 & 0xFF]) ^ Ker[1];a2 = (sm_T1[(t2 >> 24) & 0xFF] ^ sm_T2[(t3 >> 16) & 0xFF]^ sm_T3[(t0 >> 8) & 0xFF] ^ sm_T4[t1 & 0xFF]) ^ Ker[2];a3 = (sm_T1[(t3 >> 24) & 0xFF] ^ sm_T2[(t0 >> 16) & 0xFF]^ sm_T3[(t1 >> 8) & 0xFF] ^ sm_T4[t2 & 0xFF]) ^ Ker[3];t0 = a0;t1 = a1;t2 = a2;t3 = a3;}//Last Round is specialKer = m_Ke[m_iROUNDS];int tt = Ker[0];result[0] = sm_S[(t0 >> 24) & 0xFF] ^ (tt >> 24);result[1] = sm_S[(t1 >> 16) & 0xFF] ^ (tt >> 16);result[2] = sm_S[(t2 >> 8) & 0xFF] ^ (tt >> 8);result[3] = sm_S[t3 & 0xFF] ^ tt;tt = Ker[1];result[4] = sm_S[(t1 >> 24) & 0xFF] ^ (tt >> 24);result[5] = sm_S[(t2 >> 16) & 0xFF] ^ (tt >> 16);result[6] = sm_S[(t3 >> 8) & 0xFF] ^ (tt >> 8);result[7] = sm_S[t0 & 0xFF] ^ tt;tt = Ker[2];result[8] = sm_S[(t2 >> 24) & 0xFF] ^ (tt >> 24);result[9] = sm_S[(t3 >> 16) & 0xFF] ^ (tt >> 16);result[10] = sm_S[(t0 >> 8) & 0xFF] ^ (tt >> 8);result[11] = sm_S[t1 & 0xFF] ^ tt;tt = Ker[3];result[12] = sm_S[(t3 >> 24) & 0xFF] ^ (tt >> 24);result[13] = sm_S[(t0 >> 16) & 0xFF] ^ (tt >> 16);result[14] = sm_S[(t1 >> 8) & 0xFF] ^ (tt >> 8);result[15] = sm_S[t2 & 0xFF] ^ tt;}//Convenience method to decrypt exactly one block of plaintext, assuming//Rijndael's default block size (128-bit).// in         - The ciphertext.// result     - The plaintext generated from a ciphertext using the session key.void AES::DefDecryptBlock(char const* in, char* result){if (false == m_bKeyInit)return;int* Kdr = m_Kd[0];int t0 = ((unsigned char) *(in++) << 24);t0 = t0 | ((unsigned char) *(in++) << 16);t0 |= ((unsigned char) *(in++) << 8);(t0 |= (unsigned char) *(in++)) ^= Kdr[0];int t1 = ((unsigned char) *(in++) << 24);t1 |= ((unsigned char) *(in++) << 16);t1 |= ((unsigned char) *(in++) << 8);(t1 |= (unsigned char) *(in++)) ^= Kdr[1];int t2 = ((unsigned char) *(in++) << 24);t2 |= ((unsigned char) *(in++) << 16);t2 |= ((unsigned char) *(in++) << 8);(t2 |= (unsigned char) *(in++)) ^= Kdr[2];int t3 = ((unsigned char) *(in++) << 24);t3 |= ((unsigned char) *(in++) << 16);t3 |= ((unsigned char) *(in++) << 8);(t3 |= (unsigned char) *(in++)) ^= Kdr[3];int a0, a1, a2, a3;for (int r = 1; r < m_iROUNDS; r++) // apply round transforms{Kdr = m_Kd[r];a0 = (sm_T5[(t0 >> 24) & 0xFF] ^ sm_T6[(t3 >> 16) & 0xFF]^ sm_T7[(t2 >> 8) & 0xFF] ^ sm_T8[t1 & 0xFF]) ^ Kdr[0];a1 = (sm_T5[(t1 >> 24) & 0xFF] ^ sm_T6[(t0 >> 16) & 0xFF]^ sm_T7[(t3 >> 8) & 0xFF] ^ sm_T8[t2 & 0xFF]) ^ Kdr[1];a2 = (sm_T5[(t2 >> 24) & 0xFF] ^ sm_T6[(t1 >> 16) & 0xFF]^ sm_T7[(t0 >> 8) & 0xFF] ^ sm_T8[t3 & 0xFF]) ^ Kdr[2];a3 = (sm_T5[(t3 >> 24) & 0xFF] ^ sm_T6[(t2 >> 16) & 0xFF]^ sm_T7[(t1 >> 8) & 0xFF] ^ sm_T8[t0 & 0xFF]) ^ Kdr[3];t0 = a0;t1 = a1;t2 = a2;t3 = a3;}//Last Round is specialKdr = m_Kd[m_iROUNDS];int tt = Kdr[0];result[0] = sm_Si[(t0 >> 24) & 0xFF] ^ (tt >> 24);result[1] = sm_Si[(t3 >> 16) & 0xFF] ^ (tt >> 16);result[2] = sm_Si[(t2 >> 8) & 0xFF] ^ (tt >> 8);result[3] = sm_Si[t1 & 0xFF] ^ tt;tt = Kdr[1];result[4] = sm_Si[(t1 >> 24) & 0xFF] ^ (tt >> 24);result[5] = sm_Si[(t0 >> 16) & 0xFF] ^ (tt >> 16);result[6] = sm_Si[(t3 >> 8) & 0xFF] ^ (tt >> 8);result[7] = sm_Si[t2 & 0xFF] ^ tt;tt = Kdr[2];result[8] = sm_Si[(t2 >> 24) & 0xFF] ^ (tt >> 24);result[9] = sm_Si[(t1 >> 16) & 0xFF] ^ (tt >> 16);result[10] = sm_Si[(t0 >> 8) & 0xFF] ^ (tt >> 8);result[11] = sm_Si[t3 & 0xFF] ^ tt;tt = Kdr[3];result[12] = sm_Si[(t3 >> 24) & 0xFF] ^ (tt >> 24);result[13] = sm_Si[(t2 >> 16) & 0xFF] ^ (tt >> 16);result[14] = sm_Si[(t1 >> 8) & 0xFF] ^ (tt >> 8);result[15] = sm_Si[t0 & 0xFF] ^ tt;}//Encrypt exactly one block of plaintext.// in           - The plaintext.// result       - The ciphertext generated from a plaintext using the key.void AES::EncryptBlock(char const* in, char* result){if (false == m_bKeyInit)return;if (DEFAULT_BLOCK_SIZE == m_blockSize){DefEncryptBlock(in, result);return;}int BC = m_blockSize / 4;int SC = (BC == 4) ? 0 : (BC == 6 ? 1 : 2);int s1 = sm_shifts[SC][1][0];int s2 = sm_shifts[SC][2][0];int s3 = sm_shifts[SC][3][0];//Temporary Work Arraysint i;int tt;int* pi = t;for (i = 0; i < BC; i++){*pi = ((unsigned char) *(in++) << 24);*pi |= ((unsigned char) *(in++) << 16);*pi |= ((unsigned char) *(in++) << 8);(*(pi++) |= (unsigned char) *(in++)) ^= m_Ke[0][i];}//Apply Round Transformsfor (int r = 1; r < m_iROUNDS; r++){for (i = 0; i < BC; i++)a[i] = (sm_T1[(t[i] >> 24) & 0xFF]^ sm_T2[(t[(i + s1) % BC] >> 16) & 0xFF]^ sm_T3[(t[(i + s2) % BC] >> 8) & 0xFF]^ sm_T4[t[(i + s3) % BC] & 0xFF]) ^ m_Ke[r][i];memcpy(t, a, 4 * BC);}int j;//Last Round is Specialfor (i = 0, j = 0; i < BC; i++){tt = m_Ke[m_iROUNDS][i];result[j++] = sm_S[(t[i] >> 24) & 0xFF] ^ (tt >> 24);result[j++] = sm_S[(t[(i + s1) % BC] >> 16) & 0xFF] ^ (tt >> 16);result[j++] = sm_S[(t[(i + s2) % BC] >> 8) & 0xFF] ^ (tt >> 8);result[j++] = sm_S[t[(i + s3) % BC] & 0xFF] ^ tt;}}//Decrypt exactly one block of ciphertext.// in         - The ciphertext.// result     - The plaintext generated from a ciphertext using the session key.void AES::DecryptBlock(char const* in, char* result){if (false == m_bKeyInit)return;if (DEFAULT_BLOCK_SIZE == m_blockSize){DefDecryptBlock(in, result);return;}int BC = m_blockSize / 4;int SC = BC == 4 ? 0 : (BC == 6 ? 1 : 2);int s1 = sm_shifts[SC][1][1];int s2 = sm_shifts[SC][2][1];int s3 = sm_shifts[SC][3][1];//Temporary Work Arraysint i;int tt;int* pi = t;for (i = 0; i < BC; i++){*pi = ((unsigned char) *(in++) << 24);*pi |= ((unsigned char) *(in++) << 16);*pi |= ((unsigned char) *(in++) << 8);(*(pi++) |= (unsigned char) *(in++)) ^= m_Kd[0][i];}//Apply Round Transformsfor (int r = 1; r < m_iROUNDS; r++){for (i = 0; i < BC; i++)a[i] = (sm_T5[(t[i] >> 24) & 0xFF]^ sm_T6[(t[(i + s1) % BC] >> 16) & 0xFF]^ sm_T7[(t[(i + s2) % BC] >> 8) & 0xFF]^ sm_T8[t[(i + s3) % BC] & 0xFF]) ^ m_Kd[r][i];memcpy(t, a, 4 * BC);}int j;//Last Round is Specialfor (i = 0, j = 0; i < BC; i++){tt = m_Kd[m_iROUNDS][i];result[j++] = sm_Si[(t[i] >> 24) & 0xFF] ^ (tt >> 24);result[j++] = sm_Si[(t[(i + s1) % BC] >> 16) & 0xFF] ^ (tt >> 16);result[j++] = sm_Si[(t[(i + s2) % BC] >> 8) & 0xFF] ^ (tt >> 8);result[j++] = sm_Si[t[(i + s3) % BC] & 0xFF] ^ tt;}}//Expand a user-supplied key material into a session key.// key        - The 128/192/256-bit user-key to use.// chain      - initial chain block for CBC and CFB modes.// keylength  - 16, 24 or 32 bytes// blockSize  - The block size in bytes of this Rijndael (16, 24 or 32 bytes).void AES::MakeKey(char const* key, char const* chain, int keylength,int blockSize){if (NULL == key)return;if (!(16 == keylength || 24 == keylength || 32 == keylength))return;if (!(16 == blockSize || 24 == blockSize || 32 == blockSize))return;m_keylength = keylength;m_blockSize = blockSize;//Initialize the chainmemcpy(m_chain0, chain, m_blockSize);memcpy(m_chain, chain, m_blockSize);//Calculate Number of Roundsswitch (m_keylength){case 16:m_iROUNDS = (m_blockSize == 16) ? 10 : (m_blockSize == 24 ? 12 : 14);break;case 24:m_iROUNDS = (m_blockSize != 32) ? 12 : 14;break;default: // 32 bytes = 256 bitsm_iROUNDS = 14;}int BC = m_blockSize / 4;int i, j;for (i = 0; i <= m_iROUNDS; i++){for (j = 0; j < BC; j++)m_Ke[i][j] = 0;}for (i = 0; i <= m_iROUNDS; i++){for (j = 0; j < BC; j++)m_Kd[i][j] = 0;}int ROUND_KEY_COUNT = (m_iROUNDS + 1) * BC;int KC = m_keylength / 4;//Copy user material bytes into temporary intsint* pi = tk;char const* pc = key;for (i = 0; i < KC; i++){*pi = (unsigned char) *(pc++) << 24;*pi |= (unsigned char) *(pc++) << 16;*pi |= (unsigned char) *(pc++) << 8;*(pi++) |= (unsigned char) *(pc++);}//Copy values into round key arraysint t = 0;for (j = 0; (j < KC) && (t < ROUND_KEY_COUNT); j++, t++){m_Ke[t / BC][t % BC] = tk[j];m_Kd[m_iROUNDS - (t / BC)][t % BC] = tk[j];}int tt, rconpointer = 0;while (t < ROUND_KEY_COUNT){//Extrapolate using phi (the round key evolution function)tt = tk[KC - 1];tk[0] ^= (sm_S[(tt >> 16) & 0xFF] & 0xFF) << 24^ (sm_S[(tt >> 8) & 0xFF] & 0xFF) << 16^ (sm_S[tt & 0xFF] & 0xFF) << 8^ (sm_S[(tt >> 24) & 0xFF] & 0xFF)^ (sm_rcon[rconpointer++] & 0xFF) << 24;if (KC != 8)for (i = 1, j = 0; i < KC;)tk[i++] ^= tk[j++];else{for (i = 1, j = 0; i < KC / 2;)tk[i++] ^= tk[j++];tt = tk[KC / 2 - 1];tk[KC / 2] ^= (sm_S[tt & 0xFF] & 0xFF)^ (sm_S[(tt >> 8) & 0xFF] & 0xFF) << 8^ (sm_S[(tt >> 16) & 0xFF] & 0xFF) << 16^ (sm_S[(tt >> 24) & 0xFF] & 0xFF) << 24;for (j = KC / 2, i = j + 1; i < KC;)tk[i++] ^= tk[j++];}//Copy values into round key arraysfor (j = 0; (j < KC) && (t < ROUND_KEY_COUNT); j++, t++){m_Ke[t / BC][t % BC] = tk[j];m_Kd[m_iROUNDS - (t / BC)][t % BC] = tk[j];}}//Inverse MixColumn where neededfor (int r = 1; r < m_iROUNDS; r++)for (j = 0; j < BC; j++){tt = m_Kd[r][j];m_Kd[r][j] = sm_U1[(tt >> 24) & 0xFF] ^ sm_U2[(tt >> 16) & 0xFF]^ sm_U3[(tt >> 8) & 0xFF] ^ sm_U4[tt & 0xFF];}m_bKeyInit = true;}void AES::Encrypt(char const* in, char* result, size_t n, int iMode){if (false == m_bKeyInit)return;//n should be > 0 and multiple of m_blockSizeif (0 == n || n % m_blockSize != 0)return;int i;char const* pin;char* presult;if (CBC == iMode) //CBC mode, using the Chain{for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){Xor(m_chain, pin);EncryptBlock(m_chain, presult);memcpy(m_chain, presult, m_blockSize);pin += m_blockSize;presult += m_blockSize;}}else if (CFB == iMode) //CFB mode, using the Chain{for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){EncryptBlock(m_chain, presult);Xor(presult, pin);memcpy(m_chain, presult, m_blockSize);pin += m_blockSize;presult += m_blockSize;}}else //ECB mode, not using the Chain{for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){EncryptBlock(pin, presult);pin += m_blockSize;presult += m_blockSize;}}}void AES::Decrypt(char const* in, char* result, size_t n, int iMode){if (false == m_bKeyInit)return;//n should be > 0 and multiple of m_blockSizeif (0 == n || n % m_blockSize != 0)return;int i;char const* pin;char* presult;if (CBC == iMode) //CBC mode, using the Chain{for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){DecryptBlock(pin, presult);Xor(presult, m_chain);memcpy(m_chain, pin, m_blockSize);pin += m_blockSize;presult += m_blockSize;}}else if (CFB == iMode) //CFB mode, using the Chain, not using Decrypt(){for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){EncryptBlock(m_chain, presult);//memcpy(presult, pin, m_blockSize);Xor(presult, pin);memcpy(m_chain, pin, m_blockSize);pin += m_blockSize;presult += m_blockSize;}}else //ECB mode, not using the Chain{for (i = 0, pin = in, presult = result; i < n / m_blockSize; i++){DecryptBlock(pin, presult);pin += m_blockSize;presult += m_blockSize;}}}

Base64算法的C++实现

Base64.h

#ifndef BASE_64_H#define BASE_64_H#include <string>std::string base64_encode(unsigned char const* , unsigned int len);std::string base64_decode(std::string const& s);#endif

Base64.cpp

#include "base64.h"#include <iostream>#include <ctype.h>static const std::string base64_chars =             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"             "abcdefghijklmnopqrstuvwxyz"             "0123456789+/";static inline bool is_base64(unsigned char c) {  return (isalnum(c) || (c == '+') || (c == '/'));}std::string base64_encode(unsigned char const* bytes_to_encode, unsigned int in_len) {  std::string ret;  int i = 0;  int j = 0;  unsigned char char_array_3[3];  unsigned char char_array_4[4];  while (in_len--) {    char_array_3[i++] = *(bytes_to_encode++);    if (i == 3) {      char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;      char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);      char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);      char_array_4[3] = char_array_3[2] & 0x3f;      for(i = 0; (i <4) ; i++)        ret += base64_chars[char_array_4[i]];      i = 0;    }  }  if (i)  {    for(j = i; j < 3; j++)      char_array_3[j] = '\0';    char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;    char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);    char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);    char_array_4[3] = char_array_3[2] & 0x3f;    for (j = 0; (j < i + 1); j++)      ret += base64_chars[char_array_4[j]];    while((i++ < 3))      ret += '=';  }  return ret;}std::string base64_decode(std::string const& encoded_string) {  int in_len = encoded_string.size();  int i = 0;  int j = 0;  int in_ = 0;  unsigned char char_array_4[4], char_array_3[3];  std::string ret;  while (in_len-- && ( encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {    char_array_4[i++] = encoded_string[in_]; in_++;    if (i ==4) {      for (i = 0; i <4; i++)        char_array_4[i] = base64_chars.find(char_array_4[i]);      char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);      char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);      char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];      for (i = 0; (i < 3); i++)        ret += char_array_3[i];      i = 0;    }  }  if (i) {    for (j = i; j <4; j++)      char_array_4[j] = 0;    for (j = 0; j <4; j++)      char_array_4[j] = base64_chars.find(char_array_4[j]);    char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);    char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);    char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];    for (j = 0; (j < i - 1); j++) ret += char_array_3[j];  }  return ret;}

说明:本文算法代码是参考网络上的代码，自身进行优化和封装完成的。