1 | #include <QCoreApplication> |
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2 | |
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3 | #include <QTime> |
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4 | #include <QElapsedTimer> |
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5 | #include <QFile> |
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6 | #include <QTextStream> |
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7 | |
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8 | #include <iostream> |
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9 | |
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10 | #include "crypto++/rsa.h" |
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11 | #include "crypto++/elgamal.h" |
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12 | #include "crypto++/osrng.h" |
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13 | #include <crypto++/files.h> |
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14 | |
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15 | |
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16 | |
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17 | /** |
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18 | * Programa de Cryptopp para realizar estimaciones de ejecuciones del |
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19 | * algoritmo EL GAMAL |
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20 | * |
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21 | * https://www.cryptopp.com/wiki/ElGamal |
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22 | * |
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23 | * |
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24 | * Es necesario instalar los siguientes paquetes: |
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25 | * libcrypto++9 y libcrypto++-dev |
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26 | * |
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27 | */ |
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28 | |
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29 | using namespace CryptoPP; |
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30 | |
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31 | int main(int argc, char *argv[]) |
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32 | { |
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33 | QCoreApplication a(argc, argv); |
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34 | //return a.exec(); |
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35 | |
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36 | |
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37 | /////////////////////////////////////// |
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38 | // Pseudo Random Number Generator |
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39 | AutoSeededRandomPool rng; |
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40 | |
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41 | |
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42 | //QTime timer; |
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43 | QElapsedTimer timer; |
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44 | |
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45 | //int runtime = timer.elapsed(); //gets the runtime in ms |
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46 | |
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47 | // prefijo del nombre del archivo con el texto a cifrar |
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48 | QString messageFile = "message"; |
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49 | |
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50 | |
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51 | //////////////////////////////////////////////// |
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52 | // Secret to protect |
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53 | //static const int SECRET_SIZE = 16; |
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54 | //SecByteBlock plaintext( SECRET_SIZE ); |
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55 | //memset( plaintext, 'A', SECRET_SIZE ); |
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56 | |
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57 | std::string s; |
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58 | //CryptoPP::FileSource file( "message.txt", true, new StringSink( s ) ); |
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59 | |
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60 | std::cout << s << std::endl; |
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61 | std::cout << s.size() << std::endl; |
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62 | |
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63 | SecByteBlock plaintext( (const unsigned char *) s.data(), s.size() ); |
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64 | |
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65 | |
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66 | // iterar por el número de archivos (10) |
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67 | for (int i = 1; i <= 2; i++) |
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68 | { |
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69 | messageFile.append(QString::number(i)); |
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70 | |
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71 | qDebug("generar archivo..."); |
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72 | // generar registros en archivo de texto |
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73 | QString fileName = "registro-elgamal-"; |
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74 | fileName.append(messageFile+"-"); |
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75 | fileName.append(QDateTime::currentDateTime().toString("dd.MM.yy.hh.mm.ss")); |
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76 | fileName.append(".txt"); |
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77 | |
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78 | messageFile.append(".txt"); |
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79 | |
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80 | std::string s; |
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81 | //CryptoPP::FileSource file( qPrintable(messageFile), true, new StringSink( s ) ); |
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82 | |
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83 | //std::cout << s ;//<< std::endl; |
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84 | //std::cout << s.size() << std::endl; |
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85 | |
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86 | // archivo de salida de resultados |
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87 | QFile registerFile(fileName); |
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88 | if (registerFile.open(QFile::WriteOnly)) |
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89 | { |
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90 | // flujo para el archivo de salida de resultados |
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91 | QTextStream outFile(®isterFile); |
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92 | |
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93 | |
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94 | // linea que mantiene los valores de tiempo |
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95 | QString line; |
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96 | |
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97 | // iterar 50 veces el proceso de cifrado y descifrado del texto |
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98 | for (int j = 0; j < 1; j++) |
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99 | { |
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100 | |
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101 | qDebug("*************************************************"); |
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102 | std::cout << "Generating private key. This may take some time..." << std::endl; |
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103 | timer.start(); |
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104 | ElGamal::Decryptor gamalDecryptor; |
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105 | gamalDecryptor.AccessKey().GenerateRandomWithKeySize(rng, 2048); |
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106 | qDebug("gamalDecryptor.AccessKey().GenerateRandomWithKeySize(rng, 2048);"); |
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107 | |
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108 | int runtime = timer.elapsed(); //gets the runtime in ms |
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109 | qDebug(qPrintable("key generation: "+QString::number(runtime)+" ms")); |
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110 | |
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111 | line.append(QString::number(runtime)); |
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112 | line.append(" "); |
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113 | |
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114 | const ElGamalKeys::PrivateKey& gamalPrivateKey = gamalDecryptor.AccessKey(); |
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115 | |
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116 | ElGamal::Encryptor gamalEncryptor(gamalDecryptor); |
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117 | const PublicKey& gamalPublicKey = gamalEncryptor.AccessKey(); |
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118 | qDebug("const PublicKey& gamalPublicKey = gamalEncryptor.AccessKey();"); |
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119 | //////////////////////////////////////////////// |
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120 | // Secret to protect |
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121 | //static const int SECRET_SIZE = 16; |
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122 | //SecByteBlock plaintext( SECRET_SIZE ); |
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123 | //memset( plaintext, 'A', SECRET_SIZE ); |
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124 | |
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125 | //////////////////////////////////////////////// |
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126 | // Encrypt |
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127 | |
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128 | // Now that there is a concrete object, we can validate |
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129 | assert( 0 != gamalEncryptor.FixedMaxPlaintextLength() ); |
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130 | qDebug("gamalEncryptor.FixedMaxPlaintextLength(): %zu", gamalEncryptor.FixedMaxPlaintextLength()); |
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131 | // para ElGamal mas de 253 bytes hace que el asser que sigue falle |
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132 | |
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133 | assert( plaintext.size() <= gamalEncryptor.FixedMaxPlaintextLength() ); |
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134 | |
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135 | // Create cipher text space |
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136 | //size_t ecl = gamalEncryptor.CiphertextLength( plaintext.size() ); |
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137 | size_t ecl2 = gamalEncryptor.CiphertextLength( plaintext.size() ); |
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138 | assert( 0 != ecl2 ); |
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139 | SecByteBlock ciphertext2( ecl2 ); |
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140 | |
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141 | timer.start(); |
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142 | gamalEncryptor.Encrypt( rng, plaintext, plaintext.size(), ciphertext2 ); |
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143 | runtime = timer.elapsed(); //gets the runtime in ms |
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144 | qDebug(qPrintable("ElGamal encryption time: "+QString::number(runtime)+" ms")); |
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145 | line.append(QString::number(runtime)); |
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146 | line.append(" "); |
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147 | |
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148 | //////////////////////////////////////////////// |
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149 | // Decrypt |
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150 | |
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151 | // Now that there is a concrete object, we can check sizes |
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152 | assert( 0 != gamalDecryptor.FixedCiphertextLength() ); |
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153 | assert( ciphertext2.size() <= gamalDecryptor.FixedCiphertextLength() ); |
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154 | |
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155 | // Create recovered text space |
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156 | //size_t dpl = gamalDecryptor.MaxPlaintextLength( ciphertext2.size() ); |
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157 | size_t dpl2 = gamalDecryptor.MaxPlaintextLength( ciphertext2.size() ); |
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158 | assert( 0 != dpl2 ); |
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159 | SecByteBlock recovered2( dpl2 ); |
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160 | |
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161 | timer.start(); |
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162 | //DecodingResult result = gamalDecryptor.Decrypt( rng, ciphertext, ciphertext.size(), recovered ); |
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163 | DecodingResult result2 = gamalDecryptor.Decrypt( rng, ciphertext2, ciphertext2.size(), recovered2 ); |
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164 | runtime = timer.elapsed(); //gets the runtime in ms |
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165 | qDebug(qPrintable("ElGamal decryption time: "+QString::number(runtime)+" ms")); |
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166 | line.append(QString::number(runtime)); |
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167 | line.append(" "); |
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168 | |
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169 | |
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170 | // More sanity checks |
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171 | assert( result2.isValidCoding ); |
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172 | assert( result2.messageLength <= gamalDecryptor.MaxPlaintextLength( ciphertext2.size() ) ); |
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173 | |
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174 | // At this point, we can set the size of the recovered |
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175 | // data. Until decryption occurs (successfully), we |
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176 | // only know its maximum size |
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177 | recovered2.resize( result2.messageLength ); |
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178 | |
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179 | // SecByteBlock is overloaded for proper results below |
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180 | assert( plaintext == recovered2 ); |
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181 | |
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182 | // If the assert fires, we won't get this far. |
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183 | if(plaintext == recovered2) |
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184 | std::cout << "Recovered plain text" << std::endl; |
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185 | else |
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186 | std::cout << "Failed to recover plain text" << std::endl; |
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187 | |
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188 | } |
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189 | } |
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190 | } |
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191 | qDebug("exit"); |
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192 | } |
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193 | |
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194 | |
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