public void TestLoadWithInvalidPassphrase()
{
Headers headers = new Headers();
V2Aes256CryptoFactory cryptoFactory = new V2Aes256CryptoFactory();
headers.HeaderBlocks.Add(new PreambleHeaderBlock());
headers.HeaderBlocks.Add(new VersionHeaderBlock(new byte[] { 4, 0, 2, 0, 0 }));
V2KeyWrapHeaderBlock originalKeyWrapBlock = new V2KeyWrapHeaderBlock(cryptoFactory, new V2DerivedKey(new Passphrase("RealKey"), 256), 10);
V2KeyWrapHeaderBlock headerKeyWrapBlock = new V2KeyWrapHeaderBlock(originalKeyWrapBlock.GetDataBlockBytes());
headers.HeaderBlocks.Add(headerKeyWrapBlock);
headers.HeaderBlocks.Add(new FileInfoEncryptedHeaderBlock(new byte[0]));
headers.HeaderBlocks.Add(new V2CompressionEncryptedHeaderBlock(new byte[1]));
headers.HeaderBlocks.Add(new V2UnicodeFileNameInfoEncryptedHeaderBlock(new byte[0]));
headers.HeaderBlocks.Add(new DataHeaderBlock());
IDerivedKey key;
key = cryptoFactory.RestoreDerivedKey(new Passphrase("WrongKey"), headerKeyWrapBlock.DerivationSalt, headerKeyWrapBlock.DerivationIterations);
headerKeyWrapBlock.SetDerivedKey(cryptoFactory, key);
V2DocumentHeaders documentHeaders = new V2DocumentHeaders(headerKeyWrapBlock);
Assert.That(documentHeaders.Load(headers), Is.False);
key = cryptoFactory.RestoreDerivedKey(new Passphrase("AnotherWrongKey"), headerKeyWrapBlock.DerivationSalt, headerKeyWrapBlock.DerivationIterations);
headerKeyWrapBlock.SetDerivedKey(cryptoFactory, key);
documentHeaders = new V2DocumentHeaders(headerKeyWrapBlock);
Assert.That(documentHeaders.Load(headers), Is.False);
key = cryptoFactory.RestoreDerivedKey(new Passphrase("RealKey"), headerKeyWrapBlock.DerivationSalt, headerKeyWrapBlock.DerivationIterations);
headerKeyWrapBlock.SetDerivedKey(cryptoFactory, key);
documentHeaders = new V2DocumentHeaders(headerKeyWrapBlock);
Assert.That(documentHeaders.Load(headers), Is.True);
}
public static void TestGetCryptoFromHeaders(CryptoImplementation cryptoImplementation)
{
SetupAssembly.AssemblySetupCrypto(cryptoImplementation);
Headers headers = new Headers();
V2DocumentHeaders documentHeaders = new V2DocumentHeaders(new EncryptionParameters(new V2Aes256CryptoFactory().CryptoId, new Passphrase("passphrase")), 10);
using (V2HmacStream <MemoryStream> stream = V2HmacStream.Create <MemoryStream>(new V2HmacCalculator(new SymmetricKey(new byte[0])), new MemoryStream()))
{
documentHeaders.WriteStartWithHmac(stream);
stream.Flush();
stream.Chained.Position = 0;
using (V2AxCryptReader reader = new V2AxCryptReader(new LookAheadStream(stream.Chained)))
{
while (reader.Read())
{
if (reader.CurrentItemType == AxCryptItemType.HeaderBlock)
{
headers.HeaderBlocks.Add(reader.CurrentHeaderBlock);
}
}
SymmetricKey dataEncryptingKey = documentHeaders.Headers.FindHeaderBlock <V2KeyWrapHeaderBlock>().MasterKey;
V2KeyWrapHeaderBlock keyWrap = headers.FindHeaderBlock <V2KeyWrapHeaderBlock>();
IDerivedKey key = new V2Aes256CryptoFactory().RestoreDerivedKey(new Passphrase("passphrase"), keyWrap.DerivationSalt, keyWrap.DerivationIterations);
keyWrap.SetDerivedKey(new V2Aes256CryptoFactory(), key);
Assert.That(dataEncryptingKey, Is.EqualTo(keyWrap.MasterKey));
key = new V2Aes256CryptoFactory().RestoreDerivedKey(new Passphrase("wrong"), keyWrap.DerivationSalt, keyWrap.DerivationIterations);
keyWrap.SetDerivedKey(new V2Aes256CryptoFactory(), key);
Assert.That(dataEncryptingKey, Is.Not.EqualTo(keyWrap.MasterKey));
}
}
}
