public void PackingAndUnpackingResultsInOriginal()
{
CryptoHeader header = new CryptoHeader
{
PackageName = "MyAppName",
AlgorithmName = "Twofish",
KdfName = "PBKDF2",
Cost = "10",
Nonce = CommonMocksAndStubs.FilledByteArray(8, 66),
Salt = CommonMocksAndStubs.FilledByteArray(8, 77),
Compression = "gzip",
};
byte[] cipher = CommonMocksAndStubs.FilledByteArray(16, 88);
byte[] packedHeader = CryptoHeaderPacker.PackHeaderAndCypher(header, cipher);
CryptoHeaderPacker.UnpackHeaderAndCipher(packedHeader, "MyAppName", out CryptoHeader unpackedHeader, out byte[] unpackedCipher);
Assert.AreEqual(header.PackageName, unpackedHeader.PackageName);
Assert.AreEqual(header.AlgorithmName, unpackedHeader.AlgorithmName);
Assert.AreEqual(header.KdfName, unpackedHeader.KdfName);
Assert.AreEqual(header.Cost, unpackedHeader.Cost);
Assert.AreEqual(header.Nonce, unpackedHeader.Nonce);
Assert.AreEqual(header.Salt, unpackedHeader.Salt);
Assert.AreEqual(cipher, unpackedCipher);
Assert.AreEqual(header.Compression, unpackedHeader.Compression);
}
public void PackingAndUnpackingWorksWithKeyOnly()
{
// If the encryption is started with a key instead of a password, there are not all parametes set.
CryptoHeader header = new CryptoHeader
{
PackageName = "MyAppName",
AlgorithmName = "Twofish",
KdfName = null,
Cost = null,
Nonce = CommonMocksAndStubs.FilledByteArray(8, 66),
Salt = null,
Compression = "gzip",
};
byte[] cipher = CommonMocksAndStubs.FilledByteArray(16, 88);
byte[] packedHeader = CryptoHeaderPacker.PackHeaderAndCypher(header, cipher);
CryptoHeaderPacker.UnpackHeaderAndCipher(packedHeader, "MyAppName", out CryptoHeader unpackedHeader, out byte[] unpackedCipher);
Assert.AreEqual(header.PackageName, unpackedHeader.PackageName);
Assert.AreEqual(header.AlgorithmName, unpackedHeader.AlgorithmName);
Assert.AreEqual(header.KdfName, unpackedHeader.KdfName);
Assert.AreEqual(header.Cost, unpackedHeader.Cost);
Assert.AreEqual(header.Nonce, unpackedHeader.Nonce);
Assert.AreEqual(header.Salt, unpackedHeader.Salt);
Assert.AreEqual(cipher, unpackedCipher);
Assert.AreEqual(header.Compression, unpackedHeader.Compression);
}
public void HasMatchingHeaderHandlesNullAndEmpty()
{
byte[] array = null;
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
array = new byte[0];
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
}
public void EnsureBackwardsCompatibility()
{
// Ensure that a once stored packed header can always be unpacked even after changes in the liberary
string packedBase64Header = "TXlBcHBOYW1lJFR3b2Zpc2gkUWtKQ1FrSkNRa0k9JFBCS0RGMiRUVTFOVFUxTlRVMD0kMTAkWFhYWFhYWFhYWFhYWFhYWA==";
byte[] packedHeader = CryptoUtils.Base64StringToBytes(packedBase64Header);
CryptoHeaderPacker.UnpackHeaderAndCipher(packedHeader, "MyAppName", out CryptoHeader unpackedHeader, out byte[] unpackedCipher);
Assert.AreEqual("MyAppName", unpackedHeader.PackageName);
Assert.AreEqual("Twofish", unpackedHeader.AlgorithmName);
Assert.AreEqual("PBKDF2", unpackedHeader.KdfName);
Assert.AreEqual("10", unpackedHeader.Cost);
Assert.AreEqual(CommonMocksAndStubs.FilledByteArray(8, 66), unpackedHeader.Nonce);
Assert.AreEqual(CommonMocksAndStubs.FilledByteArray(8, 77), unpackedHeader.Salt);
Assert.AreEqual(CommonMocksAndStubs.FilledByteArray(16, 88), unpackedCipher);
}
public void HasMatchingHeaderRecognizesOldHeaderWithoutRevision()
{
byte[] array = CryptoUtils.StringToBytes("MyAppName$");
int revision;
Assert.IsTrue(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out revision));
Assert.AreEqual(1, revision);
array = CryptoUtils.StringToBytes("MyAppName$1234");
Assert.IsTrue(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out revision));
Assert.AreEqual(1, revision);
array = CryptoUtils.StringToBytes("MyAppName");
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
array = CryptoUtils.StringToBytes("YourAppName$");
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
}
public void HasMatchingHeaderRecognizesValidHeader()
{
byte[] array = CryptoUtils.StringToBytes("MyAppName v=8$");
int revision;
Assert.IsTrue(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out revision));
Assert.AreEqual(8, revision);
array = CryptoUtils.StringToBytes("MyAppName v=88$1234");
Assert.IsTrue(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out revision));
Assert.AreEqual(88, revision);
array = CryptoUtils.StringToBytes("MyAppName v=8");
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
array = CryptoUtils.StringToBytes("MyAppName v=8e$");
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
array = CryptoUtils.StringToBytes("YourAppName v=8$");
Assert.IsFalse(CryptoHeaderPacker.HasMatchingHeader(array, "MyAppName", out _));
}
