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using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Diagnostics;
using namespace System::Collections::Generic;
using namespace System::Text;
namespace myapplication {
/// <summary>
/// Summary for Class1
/// </summary>
public ref class Class1 : public System::ComponentModel::Component
{
public:
Class1(void)
{
InitializeComponent();
//
//TODO: Add the constructor code here
//
}
Class1(System::ComponentModel::IContainer ^container)
{
/// <summary>
/// Required for Windows.Forms Class Composition Designer support
/// </summary>
container->Add(this);
InitializeComponent();
}
protected:
/// <summary>
/// Clean up any resources being used.
/// </summary>
~Class1()
{
if (components)
{
delete components;
}
}
private:
/// <summary>
/// Required designer variable.
/// </summary>
System::ComponentModel::Container ^components;
#pragma region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
components = gcnew System::ComponentModel::Container();
}
#pragma endregion
public: void PolyAES()
{
this->algo = gcnew System::Security::Cryptography::RijndaelManaged();
this->algo->Mode = System::Security::Cryptography::CipherMode::CBC;
this->rngAlgo = gcnew System::Security::Cryptography::RNGCryptoServiceProvider();
}
private:
literal int saltSize = 32;
System::Security::Cryptography::SymmetricAlgorithm ^algo;
System::Security::Cryptography::RNGCryptoServiceProvider ^rngAlgo;
array<Byte> ^salt;
private:
void InitializeSecureParameters(array<Byte> ^key)
{
// init rijndael IV
this->algo->GenerateIV();
salt = gcnew array<Byte>(saltSize);
rngAlgo->GetBytes(salt);
System::Security::Cryptography::Rfc2898DeriveBytes ^pwDeriveAlg = gcnew System::Security::Cryptography::Rfc2898DeriveBytes(key, salt, 2000);
this->algo->Key = pwDeriveAlg->GetBytes(32);
}
void LoadSecureParameters(array<Byte> ^key, array<Byte> ^encIv, array<Byte> ^encSalt)
{
this->algo->IV = encIv;
this->salt = encSalt;
System::Security::Cryptography::Rfc2898DeriveBytes ^pwDeriveAlg = gcnew System::Security::Cryptography::Rfc2898DeriveBytes(key, salt, 2000);
this->algo->Key = pwDeriveAlg->GetBytes(32);
}
public:
String ^Encrypt(String ^plainText, String ^key)
{
return Convert::ToBase64String(this->Encrypt(UnicodeEncoding::UTF8->GetBytes(plainText), UnicodeEncoding::UTF8->GetBytes(key)));
}
String ^Decrypt(String ^cipherText, String ^key)
{
return UnicodeEncoding::UTF8->GetString(this->Decrypt(Convert::FromBase64String(cipherText), UnicodeEncoding::UTF8->GetBytes(key)));
}
array<Byte> ^Encrypt(array<Byte> ^plainText, array<Byte> ^key)
{
InitializeSecureParameters(key);
System::Security::Cryptography::ICryptoTransform ^encTransform = algo->CreateEncryptor();
return ConcatDataToCipherText(ConcatDataToCipherText(encTransform->TransformFinalBlock(plainText, 0, plainText->Length), salt), algo->IV);
}
array<Byte> ^Decrypt(array<Byte> ^cipherText, array<Byte> ^key)
{
array<Byte> ^cipherTextWithSalt = gcnew array<Byte>(1);
array<Byte> ^encSalt = gcnew array<Byte>(1);
array<Byte> ^origCipherText = gcnew array<Byte>(1);
array<Byte> ^encIv = gcnew array<Byte>(1);
SliceCipherTextIntoParts(cipherText, 16, cipherTextWithSalt, encIv);
SliceCipherTextIntoParts(cipherTextWithSalt, saltSize, origCipherText, encSalt);
LoadSecureParameters(key, encIv, encSalt);
System::Security::Cryptography::ICryptoTransform ^decTransform = algo->CreateDecryptor();
array<Byte> ^plainText = decTransform->TransformFinalBlock(origCipherText, 0, origCipherText->Length);
return plainText;
}
private:
array<Byte> ^ConcatDataToCipherText(array<Byte> ^cipherText, array<Byte> ^iv)
{
int origLength = cipherText->Length;
Array::Resize(cipherText, cipherText->Length + iv->Length);
Buffer::BlockCopy(iv, 0, cipherText, origLength, iv->Length);
return cipherText;
}
void SliceCipherTextIntoParts(array<Byte> ^cipherText, int secondPartLen, array<Byte> ^%origCipherText, array<Byte> ^%iv)
{
Array::Resize(iv, secondPartLen);
Buffer::BlockCopy(cipherText, Convert::ToInt32(cipherText->Length - secondPartLen), iv, 0, secondPartLen);
Array::Resize(origCipherText, Convert::ToInt32(cipherText->Length - secondPartLen));
Buffer::BlockCopy(cipherText, 0, origCipherText, 0, Convert::ToInt32(cipherText->Length - secondPartLen));
}
};
}
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