DES.7z_DES 加密_Des加密解密

#include "pch.h" #include "CDES.h" // initial permutation IP const static char IP_Table[64] = { 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 }; // final permutation IP^-1 const static char IPR_Table[64] = { 40, 8, 48, 16, 56, 24, 64, 32, 39, 7, 47, 15, 55, 23, 63, 31, 38, 6, 46, 14, 54, 22, 62, 30, 37, 5, 45, 13, 53, 21, 61, 29, 36, 4, 44, 12, 52, 20, 60, 28, 35, 3, 43, 11, 51, 19, 59, 27, 34, 2, 42, 10, 50, 18, 58, 26, 33, 1, 41, 9, 49, 17, 57, 25 }; // expansion operation matrix static const char E_Table[48] = { 32, 1, 2, 3, 4, 5, 4, 5, 6, 7, 8, 9, 8, 9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17, 16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25, 24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32, 1 }; // 32-bit permutation function P used on the output of the S-boxes const static char P_Table[32] = { 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 }; // permuted choice table (key) const static char PC1_Table[56] = { 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 }; // permuted choice key (table) const static char PC2_Table[48] = { 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 }; // number left rotations of pc1 const static char LOOP_Table[16] = { 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1 }; // The (in)famous S-boxes const static char S_Box[8][4][16] = { // S1 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0, 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13, // S2 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5, 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15, 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9, // S3 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1, 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7, 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12, // S4 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9, 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4, 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14, // S5 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6, 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14, 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3, // S6 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8, 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6, 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13, // S7 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6, 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2, 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12, // S8 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2, 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8, 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 }; void CDES::_enBase64Help(unsigned char chasc[3], unsigned char chuue[4]) { int i, k = 2; unsigned char t = 0; for (i = 0; i < 3; i++) { *(chuue + i) = *(chasc + i) >> k; *(chuue + i) |= t; t = *(chasc + i) << (8 - k); t >>= 2; k += 2; } *(chuue + 3) = *(chasc + 2) & 63; for (i = 0; i < 4; i++) { if ((*(chuue + i) <= 128) && (*(chuue + i) <= 25)) { *(chuue + i) += 65; // 'A'-'Z' } else if ((*(chuue + i) >= 26) && (*(chuue + i) <= 51)) { *(chuue + i) += 71; // 'a'-'z' } else if ((*(chuue + i) >= 52) && (*(chuue + i) <= 61)) { *(chuue + i) -= 4; // 0-9 } else if (*(chuue + i) == 62) { *(chuue + i) = 43; // + } else if (*(chuue + i) == 63) { *(chuue + i) = 47; // / } } } void CDES::_deBase64Help(unsigned char chuue[4], unsigned char chasc[3]) { int i, k = 2; unsigned char t = 0; for (i = 0; i < 4; i++) { if ((*(chuue + i) >= 65) && (*(chuue + i) <= 90)) *(chuue + i) -= 65; // 'A'-'Z' -> 0-25 else if ((*(chuue + i) >= 97) && (*(chuue + i) <= 122)) *(chuue + i) -= 71; // 'a'-'z' -> 26-51 else if ((*(chuue + i) >= 48) && (*(chuue + i) <= 57)) *(chuue + i) += 4; // '0'-'9' -> 52-61 else if (*(chuue + i) == 43) *(chuue + i) = 62; // + -> 62 else if (*(chuue + i) == 47) *(chuue + i) = 63; // / -> 63 else if (*(chuue + i) == 61) *(chuue + i) = 0; // = -> 0 Note: 'A'和'='都对应了0 } for (i = 0; i < 3; i++) { *(chasc + i) = *(chuue + i) << k; k += 2; t = *(chuue + i + 1) >> (8 - k); *(chasc + i) |= t; } } string CDES::enBase64(const char* inbuf, size_t inbufLen) { string outStr; unsigned char in[8]; unsigned char out[8]; out[4] = 0; size_t blocks = inbufLen / 3; for (size_t i = 0; i < blocks; i++) { in[0] = inbuf[i * 3]; in[1] = inbuf[i * 3 + 1]; in[2] = inbuf[i * 3 + 2]; _enBase64Help(in, out); outStr += out[0]; outStr += out[1]; outStr += out[2]; outStr += out[3]; } if (inbufLen % 3 == 1) { in[0] = inbuf[inbufLen - 1]; in[1] = 0; in[2] = 0; _enBase64Help(in, out); outStr += out[0]; outStr += out[1]; outStr += '='; outStr += '='; } else if (inbufLen % 3 == 2) { in[0] = inbuf[inbufLen - 2]; in[1] = inbuf[inbufLen - 1]; in[2] = 0; _enBase64Help(in, out); outStr += out[0]; outStr += out[1]; outStr += out[2]; outStr += '='; } return string(outStr); } string CDES::enBase64(const string& inbuf) { return enBase64(inbuf.c_str(), inbuf.size()); } int CDES::deBase64(string src, char* outbuf) { // Break when the incoming base6 4 coding is wrong if ((src.size() % 4) != 0) { return 0; } unsigned char in[4]; unsigned char out[3]; size_t blocks = s