public void TestFileMegabyte()
{
var testEncryptionHandler = new AesCryptoManager();
var iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8 };
var key = new byte[32];
AesCryptoManager.FillWithSecureValues(key);
testEncryptionHandler.EncryptFileBytes(_assetsFolder + "TestFile.txt", _assetsFolder + "EncryptedTestFile.txt", key, iv);
testEncryptionHandler.DecryptFileBytes(_assetsFolder + "EncryptedTestFile.txt", _assetsFolder + "DecryptedTestFile.txt", key, iv);
using (var unencryptedFileReader = new BinaryReader(File.OpenRead(_assetsFolder + "TestFile.txt")))
using (var decryptedFileReader = new BinaryReader(File.OpenRead(_assetsFolder + "DecryptedTestFile.txt")))
{
Debug.Assert(new FileInfo(_assetsFolder + "TestFile.txt").Length == new FileInfo(_assetsFolder + "DecryptedTestFile.txt").Length);
while (true)
{
try
{
Debug.Assert(unencryptedFileReader.ReadByte() == decryptedFileReader.ReadByte(), "Failed decrypting - file corrupted");
}
catch (EndOfStreamException)
{
break;
}
}
}
}
public void TestBadFile()
{
var testEncryptionHandler = new AesCryptoManager();
var iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8 };
var key = new byte[32];
AesCryptoManager.FillWithSecureValues(key);
var data = new byte[1024 * 1024 * 4];
var rng = new Random();
rng.NextBytes(data);
File.WriteAllBytes(_assetsFolder + "EncryptedTestFile.txt", data);
void Fail() => testEncryptionHandler.DecryptFileBytes(_assetsFolder + "EncryptedTestFile.txt",
_assetsFolder + "DecryptedTestFile.txt", key, iv);
Assert.Throws <CryptographicException>((Action)Fail);
}
public void TestBadKey()
{
var testEncryptionHandler = new AesCryptoManager();
var iv = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 1, 2, 3, 4, 5, 6, 7, 8 };
var key = new byte[32];
var badKey = new byte[32];
AesCryptoManager.FillWithSecureValues(key);
AesCryptoManager.FillWithSecureValues(badKey);
if (key.SequenceEqual(badKey))
{
throw new ExternalException("What the $@#%");
}
testEncryptionHandler.EncryptFileBytes(_assetsFolder + "testFile.txt",
_assetsFolder + "EncryptedTestFile.txt", key, iv);
void Fail() => testEncryptionHandler.DecryptFileBytes(_assetsFolder + "EncryptedTestFile.txt", _assetsFolder + "DecryptedTestFile.txt", badKey, iv);
Assert.Throws <CryptographicException>((Action)Fail);
}
