public static void TestCreateEncryptedDataStreamErrorChecks()
{
using (MemoryStream inputStream = new MemoryStream())
{
using (AxCryptReader axCryptReader = new AxCryptStreamReader(inputStream))
{
Assert.Throws<ArgumentNullException>(() =>
{
axCryptReader.CreateEncryptedDataStream(null, 0, new ProgressContext());
}, "A non-null HMAC key must be specified.");
Assert.Throws<ArgumentNullException>(() =>
{
axCryptReader.CreateEncryptedDataStream(new AesKey(), 0, null);
}, "A non-null ProgresContext must be specified.");
Assert.Throws<InvalidOperationException>(() =>
{
axCryptReader.CreateEncryptedDataStream(new AesKey(), 0, new ProgressContext());
}, "The reader is not positioned properly to read encrypted data.");
axCryptReader.Dispose();
Assert.Throws<ObjectDisposedException>(() =>
{
axCryptReader.CreateEncryptedDataStream(new AesKey(), 0, new ProgressContext());
}, "The reader is disposed.");
}
}
}
public static void TestHmac()
{
using (Stream inputStream = FakeRuntimeFileInfo.ExpandableMemoryStream(Resources.helloworld_key_a_txt))
{
using (AxCryptReader axCryptReader = new AxCryptStreamReader(inputStream))
{
Assert.Throws<InvalidOperationException>(() =>
{
if (axCryptReader.Hmac == null) { }
}, "The reader is not positioned properly to get the HMAC.");
Passphrase passphrase = new Passphrase("a");
DocumentHeaders documentHeaders = new DocumentHeaders(passphrase.DerivedPassphrase);
bool keyIsOk = documentHeaders.Load(axCryptReader);
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (Stream encrypedDataStream = axCryptReader.CreateEncryptedDataStream(documentHeaders.HmacSubkey.Key, documentHeaders.CipherTextLength, new ProgressContext()))
{
Assert.Throws<InvalidOperationException>(() =>
{
if (axCryptReader.Hmac == null) { }
}, "We have not read the encrypted data yet.");
Assert.That(axCryptReader.Read(), Is.False, "The reader should be at end of stream now, and Read() should return false.");
encrypedDataStream.CopyTo(Stream.Null, 4096);
Assert.That(documentHeaders.Hmac, Is.EqualTo(axCryptReader.Hmac), "The HMAC should be correct.");
axCryptReader.Dispose();
Assert.Throws<ObjectDisposedException>(() =>
{
DataHmac disposedHmac = axCryptReader.Hmac;
Object.Equals(disposedHmac, null);
}, "The reader is disposed.");
}
}
}
}
