public void HelixFile_IllegalFileNameChar()
{
//Delete("original1.txt", "encr1.hx", "decrypted1.txt");
if (File.Exists("encr1.hx"))
{
File.Delete("encr1.hx");
}
File.WriteAllText("original1.txt", "hello world");
HelixFile.Encrypt("original1.txt", "encr1.hx", "password", new FileEncryptOptions
{
BeforeWriteHeader = (header) =>
{
header.FileName = "./original1.txt";
},
FileVersion = HelixFileVersion.UnitTest,
});
try
{
HelixFile.Decrypt("encr1.hx", "decrypted1.txt", "password");
Assert.IsTrue(false, "Failed to detect file name curruption");
}
catch (HeaderCorruptionException) { }
}
public void HelixFile_EncryptDecrypt()
{
if (File.Exists("encr1.hx"))
{
File.Delete("encr1.hx");
}
File.WriteAllText("original1.txt", "hello world");
HelixFile.Encrypt("original1.txt", "encr1.hx", "password", new FileEncryptOptions {
FileVersion = HelixFileVersion.UnitTest
});
HelixFile.Decrypt("encr1.hx", "decrypted1.txt", "password");
Assert.AreEqual("hello world", File.ReadAllText("decrypted1.txt"));
}
public void HelixFile_LargerFile()
{
byte[] b = new byte[50000];
System.Security.Cryptography.RandomNumberGenerator.Create().GetBytes(b);
string file1 = nameof(HelixFile_LargerFile);
string encrFile = file1 + ".hx";
string file2 = file1 + "_2";
Delete(file1, encrFile, file2);
File.WriteAllBytes(file1, b);
HelixFile.Encrypt(file1, encrFile, "password", new FileEncryptOptions {
FileVersion = HelixFileVersion.UnitTest
});
HelixFile.Decrypt(encrFile, file2, "password");
byte[] b2 = File.ReadAllBytes(file2);
Assert.IsTrue(Util.BytesEqual(b, b2));
Delete(file1, encrFile, file2);
}
private static byte TestRandomCurruption(string inp, int pos, byte adj)
{
Delete("temp.txt", "temp.decr", "temp.hx");
File.WriteAllText("temp.txt", inp);
HelixFile.Encrypt("temp.txt", "temp.hx", "password", new FileEncryptOptions {
FileVersion = HelixFileVersion.UnitTest
});
try
{
if (adj == 0)
{
adj = 1;
}
using (var file = File.Open("temp.hx", FileMode.Open, FileAccess.ReadWrite))
{
byte[] content = new byte[1];
file.Seek(pos % file.Length, SeekOrigin.Begin);
file.Read(content, 0, 1);
file.Seek(pos % file.Length, SeekOrigin.Begin);
unchecked
{
content[0] = (byte)(content[0] + adj);
}
file.Write(content, 0, 1);
}
HelixFile.Decrypt("temp.hx", "temp.decr", "password");
throw new Exception("Expected to see curruption none present");
}
catch (HelixException)
{
}
Assert.IsFalse(File.Exists("temp.decr"), "File temp.decr expected to have been deleted however has not");
Delete("temp.txt", "temp.decr", "temp.hx");
return(adj);
}
public void HelixFile_LargerFileTruncate()
{
byte[] b = new byte[50000];
System.Security.Cryptography.RandomNumberGenerator.Create().GetBytes(b);
string file1 = nameof(HelixFile_LargerFileTruncate);
string encrFile = file1 + ".hx";
string file2 = file1 + "_2";
Delete(file1, encrFile, file2);
File.WriteAllBytes(file1, b);
HelixFile.Encrypt(file1, encrFile, "password", new FileEncryptOptions {
FileVersion = HelixFileVersion.UnitTest
});
//Truncates File by 10 bytes
byte[] encryptBytes = File.ReadAllBytes(encrFile);
Assert.IsTrue(encryptBytes.Length > 50000);
Delete(encrFile);
Array.Resize(ref encryptBytes, encryptBytes.Length - 10);
File.WriteAllBytes(encrFile, encryptBytes);
try
{
HelixFile.Decrypt(encrFile, file2, "password");
Assert.IsTrue(false, "Expected FileCurruptionException");
}
catch (FileCorruptionException)
{
}
Assert.IsFalse(File.Exists(file2));
Delete(file1, encrFile, file2);
}
