私はC#、VB.net、VC ++(VS 2008)に暗号化復号化コードを持っており、これによって暗号化されたファイルは誰でも復号化できます。
ここでの要件は、VC ++6.0でVC++(VS 2008)静的libファイルを使用する必要があるということです。
または、これを行うための他の代替案を提案します(dllなし)
namespace RijndaelEncDec
{
void Rijndael::LN_EncryptFile(String^ fileSource, String^ fileDestination, String^ password)
{
// Declare the streams used
// to encrypt to an in memory
// array of bytes.
CryptoStream^ cryptoStream;
FileStream^ fsIn;
FileStream^ fsOut ;
// Declare the RijndaelManaged object
// used to encrypt the data.
RijndaelManaged^ RijndaelCipher;
try
{
fsIn=gcnew FileStream(fileSource, FileMode::Open, FileAccess::Read);
fsOut = gcnew FileStream(fileDestination, FileMode::Create, FileAccess::Write);
array<Byte>^ salt = gcnew array<Byte>(13){ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0xF1, 0xF0, 0xEE, 0x21, 0x22, 0x45 };
Rfc2898DeriveBytes ^secretKey =gcnew Rfc2898DeriveBytes(password,salt);
RijndaelCipher = gcnew RijndaelManaged();
RijndaelCipher->Padding = PaddingMode::PKCS7;
RijndaelCipher->Mode=CipherMode::CBC;
RijndaelCipher->BlockSize=128;
RijndaelCipher->Key = secretKey->GetBytes(32);
RijndaelCipher->IV = secretKey->GetBytes(16);
ICryptoTransform^ encryptor = RijndaelCipher->CreateEncryptor();
cryptoStream = gcnew CryptoStream(fsOut, encryptor, CryptoStreamMode::Write);
int ByteData;
while ((ByteData=fsIn->ReadByte()) != -1)
{
cryptoStream->WriteByte(ByteData);
}
cryptoStream->FlushFinalBlock();
}
catch (FileNotFoundException^ ex)
{
if ((ex->FileName->CompareTo(fileSource) == 0) && (GlobalVariableClass::logPermission == true))
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message);
writer->Close();
}
if ((ex->FileName->CompareTo(fileDestination) == 0) && GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " i.e. Input file for Encryption");
writer->Close();
}
}
catch (Exception^ ex)
{
if(GlobalVariableClass::logPermission==true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " During Encrypting File");
writer->Close();
}
}
finally
{
// Close the streams.
if (cryptoStream)
cryptoStream->Close();
if(fsIn)
fsIn->Close();
if(fsOut)
fsOut->Close();
// Clear the RijndaelManaged object.
if (RijndaelCipher)
RijndaelCipher->Clear();
}
// Return the encrypted bytes from the memory stream.
return ;//msEncrypt->ToArray();
}
void Rijndael::DecryptFile(String^ fileSource, String^ fileDestination, String^ password)
{
array<Byte>^ salt = gcnew array<Byte>(13) { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0xF1, 0xF0, 0xEE, 0x21, 0x22, 0x45 };
Rfc2898DeriveBytes ^secretKey =gcnew Rfc2898DeriveBytes(password,salt);
CryptoStream^ csDecrypt;
StreamReader^ srDecrypt;
FileStream^ fsIn;
FileStream^ fsOut;
// Declare the RijndaelManaged object
// used to decrypt the data.
RijndaelManaged^ RijndaelCipher;
try
{
fsIn = gcnew FileStream(fileSource, FileMode::Open, FileAccess::Read);
fsOut = gcnew FileStream(fileDestination, FileMode::Create, FileAccess::Write);
RijndaelCipher = gcnew RijndaelManaged();
RijndaelCipher->Padding = PaddingMode::PKCS7;
RijndaelCipher->Key = secretKey->GetBytes(32);
RijndaelCipher->IV = secretKey->GetBytes(16);
// Create a decrytor to perform the stream transform.
ICryptoTransform^ decryptor = RijndaelCipher->CreateDecryptor();
// Create the streams used for decryption.
csDecrypt = gcnew CryptoStream(fsOut, decryptor, CryptoStreamMode::Write);
int ByteData;
while ((ByteData=fsIn->ReadByte()) != -1)
{
csDecrypt->WriteByte(ByteData);
}
}
catch (FileNotFoundException^ ex)
{
if ((ex->FileName->CompareTo(fileSource) == 0) && (GlobalVariableClass::logPermission == true))
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " i.e. Input file for decryption");
writer->Close();
}
if ((ex->FileName->CompareTo(fileDestination) == 0) && GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " i.e. Output file while decryption");
writer->Close();
}
}
catch (Exception^ ex)
{
if (GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " During Decrypting File");
writer->Close();
}
}
finally
{
// Clean things up.
// Close the streams.
if (srDecrypt)
srDecrypt->Close();
if (csDecrypt)
csDecrypt->Close();
fsIn->Close();
fsOut->Close();
// Clear the RijndaelManaged object.
if (RijndaelCipher)
RijndaelCipher->Clear();
}
return ;
}
String^ Rijndael:: ReadEncryptFileToBuffer(String^ fileSource,[System::Runtime::InteropServices::OutAttribute] String ^% buffer,String^ password)
{
FileStream^ fsIn;
MemoryStream^ memoryStream;
CryptoStream^ cryptoStream;
StreamReader^ fileReader,^streamReader;
RijndaelManaged^ RijndaelCipher;
String^ decryptText;
// First we are going to open the file streams
try
{
RijndaelCipher = gcnew RijndaelManaged();
RijndaelCipher->Mode = CipherMode::CBC;
RijndaelCipher->KeySize = 256;
RijndaelCipher->BlockSize = 128;
RijndaelCipher->Padding = PaddingMode::PKCS7;
fsIn = gcnew FileStream(fileSource, FileMode::Open, FileAccess::Read);
fileReader = gcnew StreamReader(fsIn,System::Text::Encoding::Default);
String^ cipherText = fileReader->ReadToEnd();
array<Byte>^ cipherByte = System::Text::Encoding::Default->GetBytes(cipherText);
array<Byte>^ salt = gcnew array<Byte>(13) { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0xF1, 0xF0, 0xEE, 0x21, 0x22, 0x45 };
Rfc2898DeriveBytes^ secretKey = gcnew Rfc2898DeriveBytes(password, salt);
ICryptoTransform^ Decryptor = RijndaelCipher->CreateDecryptor(secretKey->GetBytes(32), secretKey->GetBytes(16));
memoryStream = gcnew MemoryStream(cipherByte);
cryptoStream = gcnew CryptoStream(memoryStream, Decryptor, CryptoStreamMode::Read);
streamReader = gcnew StreamReader(cryptoStream);
decryptText = streamReader->ReadToEnd();
buffer = decryptText;
Console::WriteLine(decryptText);
}
catch (FileNotFoundException^ ex)
{
if (ex->FileName->CompareTo(fileSource) == 0 && GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " i.e. Input file for decryption Buffer");
writer->Close();
}
}
catch (Exception^ ex)
{
if (GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + "i.e. During Reading Encrypting File to Decrypted Buffer");
writer->Close();
}
}
finally
{
if(fsIn)
fsIn->Close();
if(memoryStream)
memoryStream->Close();
if(cryptoStream)
cryptoStream->Close();
if(streamReader)
streamReader->Close();
}
return decryptText;
}
void Rijndael::WriteEncFileFromDecBuffer(String^ buffer, String^ fileDestination, String^ password)
{
FileStream^ fsOut;
CryptoStream^ cryptoStream;
StreamReader^ streamReader;
try
{
RijndaelManaged^ RijndaelCipher = gcnew RijndaelManaged();
RijndaelCipher->Mode = CipherMode::CBC;
RijndaelCipher->KeySize = 256;
RijndaelCipher->BlockSize = 128;
RijndaelCipher->Padding = PaddingMode::PKCS7;
FileStream^ fsOut = gcnew FileStream(fileDestination, FileMode::Create, FileAccess::Write);
array<Byte>^ salt = gcnew array<Byte>(13) { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0xF1, 0xF0, 0xEE, 0x21, 0x22, 0x45 };
array<Byte>^ plainText = System::Text::Encoding::Default->GetBytes(buffer);
Rfc2898DeriveBytes^ secretKey = gcnew Rfc2898DeriveBytes(password, salt);
ICryptoTransform^ Encryptor = RijndaelCipher->CreateEncryptor(secretKey->GetBytes(32), secretKey->GetBytes(16));
cryptoStream = gcnew CryptoStream(fsOut, Encryptor, CryptoStreamMode::Write);
cryptoStream->Write(plainText, 0, plainText->Length);
cryptoStream->FlushFinalBlock();
cryptoStream->Close();
fsOut->Close();
}
catch(FileNotFoundException^ ex)
{
if ( GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " i.e. Output file from Dencrypted Buffer");
writer->Close();
}
}
catch(Exception^ ex)
{
if (GlobalVariableClass::logPermission == true)
{
StreamWriter^ writer = gcnew StreamWriter(GlobalVariableClass::logFileLocation);
writer->WriteLine(ex->Message + " During Writing Encrypting File from Decrypted Buffer");
writer->Close();
}
}
finally
{
fsOut->Close();
cryptoStream->Close();
streamReader->Close();
}
}
}