public void TestDecryptWithoutLoadFirstFromEmptyFile()
{
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
using (MemoryStream plaintextStream = new MemoryStream())
{
Assert.Throws <InternalErrorException>(() => { document.DecryptTo(plaintextStream); });
}
}
}
public void TestHmacCalculationFromSimpleFile()
{
Passphrase passphrase = new Passphrase("a");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.helloworld_key_a_txt));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
document.DecryptTo(Stream.Null);
}
}
public void TestFailedHmacCalculationFromSimpleFile()
{
Passphrase passphrase = new Passphrase("a");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.helloworld_key_a_txt));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
document.DocumentHeaders.Headers.Hmac = new V1Hmac(new byte[V1Hmac.RequiredLength]);
Assert.Throws <Axantum.AxCrypt.Core.Runtime.IncorrectDataException>(() =>
{
document.DecryptTo(Stream.Null);
});
}
}
public void TestDecryptWithKeyFileImageFile()
{
Passphrase passphrase = Passphrase.Create("a", Resources.My_Key_File);
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.Foto_2015_05_19_23_19_08__a____My_Keyfile_jpg));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
Assert.That(plaintextStream.Length, Is.EqualTo(260053), "Wrong length of decrypted JPG");
}
}
}
public void TestDecryptWithKeyFilePdfFile()
{
Passphrase passphrase = Passphrase.Create("b", Resources.My_Key_File);
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources._2003_05_28_PcWorld_AxCrypt__b____My_Keyfile_pdf));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
Assert.That(plaintextStream.Length, Is.EqualTo(132498), "Wrong length of decrypted PDF");
}
}
}
public void TestReaderNotPositionedAtData()
{
MemoryStream encryptedFile = new MemoryStream(Resources.david_copperfield_key__aa_ae_oe__ulu_txt);
Headers headers = new Headers();
AxCryptReader reader = headers.CreateReader(new LookAheadStream(encryptedFile));
using (V1AxCryptDocument document = new V1AxCryptDocument(reader))
{
Passphrase key = new Passphrase("Å ä Ö");
bool keyIsOk = document.Load(key, new V1Aes128CryptoFactory().CryptoId, headers);
Assert.That(keyIsOk, Is.True);
reader.SetStartOfData();
Assert.Throws <InvalidOperationException>(() => document.DecryptTo(Stream.Null));
}
}
public void TestDecryptWithKeyFileShortTextFile()
{
Passphrase passphrase = Passphrase.Create("p", Resources.My_Key_File);
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.Passphrase__p____My_Keyfile_txt));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
string text = Encoding.UTF8.GetString(plaintextStream.GetBuffer(), 0, (int)plaintextStream.Length);
Assert.That(text, Is.EqualTo("asdfasdfasdf"), "Unexpected content of file.");
}
}
}
public void TestDecryptUncompressedFromSimpleFile()
{
Passphrase passphrase = new Passphrase("a");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.helloworld_key_a_txt));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
Assert.That(Encoding.ASCII.GetString(plaintextStream.GetBuffer(), 0, (int)plaintextStream.Length), Is.EqualTo("HelloWorld"), "Unexpected result of decryption.");
Assert.That(document.DocumentHeaders.PlaintextLength, Is.EqualTo(10), "'HelloWorld' should be 10 bytes uncompressed plaintext.");
}
}
}
public void TestDecryptAfterFailedLoad()
{
using (Stream testStream = new MemoryStream())
{
AxCrypt1Guid.Write(testStream);
testStream.Position = 0;
Passphrase passphrase = new Passphrase("Å ä Ö");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
Assert.Throws <FileFormatException>(() => { document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, testStream); });
using (MemoryStream plaintextStream = new MemoryStream())
{
Assert.Throws <InternalErrorException>(() => { document.DecryptTo(plaintextStream); });
}
}
}
}
public void TestDecryptCompressedFromLegacy0B6()
{
Passphrase passphrase = new Passphrase("åäö");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.tst_0_0b6_key__aaaeoe__medium_html));
Assert.That(keyIsOk, Is.True, "A correct passphrase was provided, but it was not accepted.");
Assert.That(document.DocumentHeaders.IsCompressed, Is.True, "The file is compressed.");
Assert.That(document.DocumentHeaders.FileName, Is.EqualTo("readme.html"), "The file name should be 'readme.html'.");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
Assert.That(document.DocumentHeaders.PlaintextLength, Is.EqualTo(3736), "The compressed content should be recorded as 3736 bytes in the headers.");
Assert.That(plaintextStream.Length, Is.EqualTo(9528), "The file should be 9528 bytes uncompressed plaintext in actual fact.");
}
}
}
public void TestDecryptCompressedFromLargerFile()
{
Passphrase passphrase = new Passphrase("Å ä Ö");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, FakeDataStore.ExpandableMemoryStream(Resources.david_copperfield_key__aa_ae_oe__ulu_txt));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
string text = Encoding.UTF8.GetString(plaintextStream.GetBuffer(), 0, (int)plaintextStream.Length);
Assert.That(text.StartsWith("The Project Gutenberg EBook of David Copperfield, by Charles Dickens"), "Unexpected start of David Copperfield.");
Assert.That(text.EndsWith("subscribe to our email newsletter to hear about new eBooks." + (Char)13 + (Char)10), "Unexpected end of David Copperfield.");
Assert.That(text.Length, Is.EqualTo(1992490), "Wrong length of full text of David Copperfield.");
Assert.That(document.DocumentHeaders.PlaintextLength, Is.EqualTo(795855), "Wrong expected length of compressed text of David Copperfield.");
}
}
}
public void TestDecryptCompressedWithTruncatedFile()
{
Passphrase passphrase = new Passphrase("Å ä Ö");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
using (MemoryStream encryptedFile = FakeDataStore.ExpandableMemoryStream(Resources.david_copperfield_key__aa_ae_oe__ulu_txt))
{
encryptedFile.SetLength(encryptedFile.Length / 2);
encryptedFile.Position = 0;
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, encryptedFile);
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
Assert.That(() => { document.DecryptTo(plaintextStream); }, Throws.InstanceOf <Exception>());
}
}
}
}
public void TestDecryptCompressedWithCancel()
{
Passphrase passphrase = new Passphrase("Å ä Ö");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
IProgressContext progress = new CancelProgressContext(new ProgressContext(new TimeSpan(0, 0, 0, 0, 100)));
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, new ProgressStream(FakeDataStore.ExpandableMemoryStream(Resources.david_copperfield_key__aa_ae_oe__ulu_txt), progress));
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
progress.Progressing += (object sender, ProgressEventArgs e) =>
{
progress.Cancel = true;
};
FakeRuntimeEnvironment environment = (FakeRuntimeEnvironment)OS.Current;
environment.CurrentTiming.CurrentTiming = new TimeSpan(0, 0, 0, 0, 100);
Assert.Throws <OperationCanceledException>(() => { document.DecryptTo(plaintextStream); });
}
}
}
public void TestSimpleEncryptToWithoutCompression()
{
DateTime creationTimeUtc = new DateTime(2012, 1, 1, 1, 2, 3, DateTimeKind.Utc);
DateTime lastAccessTimeUtc = creationTimeUtc + new TimeSpan(1, 0, 0);
DateTime lastWriteTimeUtc = creationTimeUtc + new TimeSpan(2, 0, 0);;
using (Stream inputStream = FakeDataStore.ExpandableMemoryStream(Encoding.UTF8.GetBytes("AxCrypt is Great!")))
{
using (Stream outputStream = new MemoryStream())
{
Passphrase passphrase = new Passphrase("a");
using (V1AxCryptDocument document = new V1AxCryptDocument(passphrase, 53))
{
document.DocumentHeaders.FileName = "MyFile.txt";
document.DocumentHeaders.CreationTimeUtc = creationTimeUtc;
document.DocumentHeaders.LastAccessTimeUtc = lastAccessTimeUtc;
document.DocumentHeaders.LastWriteTimeUtc = lastWriteTimeUtc;
document.EncryptTo(inputStream, outputStream, AxCryptOptions.EncryptWithoutCompression);
}
outputStream.Position = 0;
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, outputStream);
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
Assert.That(document.DocumentHeaders.FileName, Is.EqualTo("MyFile.txt"));
Assert.That(document.DocumentHeaders.CreationTimeUtc, Is.EqualTo(creationTimeUtc));
Assert.That(document.DocumentHeaders.LastAccessTimeUtc, Is.EqualTo(lastAccessTimeUtc));
Assert.That(document.DocumentHeaders.LastWriteTimeUtc, Is.EqualTo(lastWriteTimeUtc));
using (MemoryStream plaintextStream = new MemoryStream())
{
document.DecryptTo(plaintextStream);
Assert.That(document.DocumentHeaders.UncompressedLength, Is.EqualTo(-1), "'AxCrypt is Great!' should not return a value at all for uncompressed, since it was not compressed.");
Assert.That(document.DocumentHeaders.PlaintextLength, Is.EqualTo(17), "'AxCrypt is Great!' is 17 bytes plaintext length.");
Assert.That(Encoding.ASCII.GetString(plaintextStream.GetBuffer(), 0, (int)plaintextStream.Length), Is.EqualTo("AxCrypt is Great!"), "Unexpected result of decryption.");
}
}
}
}
}
public void TestDecryptUncompressedWithPaddingError()
{
Passphrase passphrase = new Passphrase("a");
using (V1AxCryptDocument document = new V1AxCryptDocument())
{
using (MemoryStream encryptedFile = FakeDataStore.ExpandableMemoryStream((byte[])Resources.helloworld_key_a_txt.Clone()))
{
encryptedFile.Seek(-1, SeekOrigin.End);
byte lastByte = (byte)encryptedFile.ReadByte();
++lastByte;
encryptedFile.Seek(-1, SeekOrigin.End);
encryptedFile.WriteByte(lastByte);
encryptedFile.Position = 0;
bool keyIsOk = document.Load(passphrase, new V1Aes128CryptoFactory().CryptoId, encryptedFile);
Assert.That(keyIsOk, Is.True, "The passphrase provided is correct!");
using (MemoryStream plaintextStream = new MemoryStream())
{
Assert.Throws <CryptoException>(() => { document.DecryptTo(plaintextStream); });
}
}
}
}
public void TestHmacThrowsWhenTooLittleData()
{
using (MemoryStream plaintext = new MemoryStream(Resources.uncompressable_zip))
{
MemoryStream encryptedFile = new MemoryStream();
using (V1AxCryptDocument encryptingDocument = new V1AxCryptDocument(new Passphrase("a"), 10))
{
encryptingDocument.EncryptTo(plaintext, encryptedFile, AxCryptOptions.EncryptWithoutCompression);
}
encryptedFile.Position = 0;
Headers headers = new Headers();
AxCryptReader reader = headers.CreateReader(new LookAheadStream(encryptedFile));
using (V1AxCryptDocument document = new V1AxCryptDocument(reader))
{
Passphrase key = new Passphrase("a");
bool keyIsOk = document.Load(key, new V1Aes128CryptoFactory().CryptoId, headers);
Assert.That(keyIsOk, Is.True);
reader.InputStream.Read(new byte[16], 0, 16);
Assert.Throws <InvalidOperationException>(() => document.DecryptTo(Stream.Null));
}
}
}