public void SecureFile_Stream_Validate()
{
string privateKey = AsymmetricCrypto.CreatePrivateKey(CryptoAlgorithm.RSA, 1024);
string publicKey = AsymmetricCrypto.GetPublicKey(CryptoAlgorithm.RSA, privateKey);
EnhancedMemoryStream original = new EnhancedMemoryStream();
EnhancedMemoryStream encrypted = new EnhancedMemoryStream();
SecureFile secure = null;
byte b;
for (int i = 0; i < 100; i++)
{
original.WriteByte((byte)i);
}
secure = new SecureFile(original, SecureFileMode.Encrypt, publicKey);
original.Position = 0;
secure.EncryptTo(encrypted, CryptoAlgorithm.AES, 256);
secure.Close();
secure = null;
encrypted.Position = 0;
Assert.IsTrue(SecureFile.Validate(encrypted, privateKey));
encrypted.Position = encrypted.Length - 1;
b = (byte)encrypted.ReadByte();
encrypted.Position = encrypted.Length - 1;
encrypted.WriteByte((byte)(~b));
encrypted.Position = 0;
Assert.IsFalse(SecureFile.Validate(encrypted, privateKey));
}
public void SecureFile_File_Validate()
{
string originalName = Path.GetTempFileName();
string encryptName = Path.GetTempFileName();
string privateKey = AsymmetricCrypto.CreatePrivateKey(CryptoAlgorithm.RSA, 1024);
string publicKey = AsymmetricCrypto.GetPublicKey(CryptoAlgorithm.RSA, privateKey);
EnhancedStream original = null;
EnhancedStream encrypted = null;
SecureFile secure = null;
byte b;
try
{
original = new EnhancedFileStream(originalName, FileMode.Create, FileAccess.ReadWrite);
for (int i = 0; i < 100; i++)
{
original.WriteByte((byte)i);
}
original.Close();
original = null;
secure = new SecureFile(originalName, SecureFileMode.Encrypt, publicKey);
secure.EncryptTo(encryptName, CryptoAlgorithm.AES, 256);
secure.Close();
secure = null;
Assert.IsTrue(SecureFile.Validate(encryptName, privateKey));
encrypted = new EnhancedFileStream(encryptName, FileMode.Open, FileAccess.ReadWrite);
encrypted.Position = encrypted.Length - 1;
b = (byte)encrypted.ReadByte();
encrypted.Position = encrypted.Length - 1;
encrypted.WriteByte((byte)(~b));
encrypted.Close();
Assert.IsFalse(SecureFile.Validate(encryptName, privateKey));
}
finally
{
if (original != null)
{
original.Close();
}
if (encrypted != null)
{
encrypted.Close();
}
System.IO.File.Delete(originalName);
System.IO.File.Delete(encryptName);
}
}