#include <rsa.h>
#include <randpool.h>
#include <filters.h>void GenerateRSAKey(byte seed[], size_t seedLen, size_t keyLen,byte privateKey[], size_t &privateKeyLen,byte publicKey[], size_t &publicKeyLen)
{CryptoPP::RandomPool randomPool;randomPool.Put(seed, seedLen);CryptoPP::RSAES_OAEP_SHA_Decryptor decryptor(randomPool, 1024);CryptoPP::ArraySink decArr(privateKey, privateKeyLen);decryptor.DEREncode(decArr);decArr.MessageEnd();privateKeyLen = decArr.TotalPutLength();CryptoPP::RSAES_OAEP_SHA_Encryptor encryptor(decryptor);CryptoPP::ArraySink encArr(publicKey, publicKeyLen);encryptor.DEREncode(encArr);encArr.MessageEnd();publicKeyLen = encArr.TotalPutLength();
}void RSAEncryptData(byte seed[], size_t seedLen, byte publicKey[], size_t publicKeyLen,byte plainData[], size_t plainDataLen, byte cipherData[], size_t &cipherDataLen)
{CryptoPP::ArraySource keyArr(publicKey, publicKeyLen, true);CryptoPP::RSAES_OAEP_SHA_Encryptor enc;enc.AccessKey().Load(keyArr);CryptoPP::RandomPool randomPool;randomPool.Put(seed, seedLen);size_t putLen = 0;size_t fixedLen = enc.FixedMaxPlaintextLength();for (size_t i = 0; i < plainDataLen; i += fixedLen){size_t len = fixedLen < (plainDataLen - i) ? fixedLen : (plainDataLen - i);CryptoPP::ArraySink *dstArr = new CryptoPP::ArraySink(cipherData + putLen, cipherDataLen - putLen);CryptoPP::ArraySource source(plainData + i, len, true, new CryptoPP::PK_EncryptorFilter(randomPool, enc, dstArr));putLen += dstArr->TotalPutLength();}cipherDataLen = putLen;
}void RSADecryptData(byte seed[], size_t seedLen, byte privateKey[], size_t privateKeyLen,byte cipherData[], size_t cipherDataLen, byte plainData[], size_t &plainDataLen)
{CryptoPP::ArraySource keyArr(privateKey, privateKeyLen, true);CryptoPP::RSAES_OAEP_SHA_Decryptor dec;dec.AccessKey().Load(keyArr);CryptoPP::RandomPool randomPool;randomPool.Put(seed, seedLen);size_t putLen = 0;size_t fixedLen = dec.FixedCiphertextLength();for (size_t i = 0; i < cipherDataLen; i += fixedLen){size_t len = fixedLen < (cipherDataLen - i) ? fixedLen : (cipherDataLen - i);CryptoPP::ArraySink *dstArr = new CryptoPP::ArraySink(plainData + putLen, plainDataLen - putLen);CryptoPP::ArraySource source(cipherData + i, len, true, new CryptoPP::PK_DecryptorFilter(randomPool, dec, dstArr));putLen += dstArr->TotalPutLength();}plainDataLen = putLen;
}

#include <iostream>
#include <string>
#include "CryptRsa.h"using namespace std;
using namespace CryptoPP;int main(int argc, char *argv)
{try{string plaintext = "{0FA152B4-D176-4D95-8363-BA9DFC787651}";cout << plaintext << endl;cout << plaintext.length() << endl;byte seed[] = { 0xCA, 0xDA, 0x63, 0xEC, 0x9B, 0x89, 0x40, 0xDE, 0x8E, 0x64, 0x94, 0xE8, 0x79, 0xEA, 0x32, 0x9E };size_t privateKeyLen = 2048;byte *privateKey = new byte[privateKeyLen];size_t publicKeyLen = 2048;byte *publicKey = new byte[publicKeyLen];GenerateRSAKey(seed, sizeof(seed), 1024, privateKey, privateKeyLen, publicKey, publicKeyLen);size_t cipherDataLen = 2048;byte *cipherData = new byte[cipherDataLen];RSAEncryptData(seed, sizeof(seed), publicKey, publicKeyLen,(byte*)plaintext.c_str(), plaintext.length(), cipherData, cipherDataLen);size_t plainDataLen = plaintext.length() * 2;byte *plainData = new byte[plainDataLen];RSADecryptData(seed, sizeof(seed), privateKey, privateKeyLen,cipherData, cipherDataLen, plainData, plainDataLen);plainData[plainDataLen] = '\0';cout << (char*)plainData << endl;cout << plainDataLen << endl;delete[] plainData;delete[] cipherData;delete[] publicKey;delete[] privateKey;}catch (std::exception &e){cout << e.what() << endl;}cin.get();return 0;
}