[24aa974] | 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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