public void DecryptPartial_TransformFinalBlock_2Pass ()
{
byte[] key = {0, 1, 2, 3, 4, 5, 6, 7};
byte[] iv = {0, 1, 2, 3, 4, 5, 6, 7};
DES des = DES.Create ();
byte[] data = Encoding.Unicode.GetBytes ("ximian"); // 12 bytes, 1.5 DES block size
DebugStream encrypted = new DebugStream ();
cs = new CryptoStream (encrypted, des.CreateEncryptor (key, iv), CryptoStreamMode.Write);
cs.Write (data, 0, data.Length);
cs.Close ();
data = encrypted.ToArray ();
DebugStream decrypted = new DebugStream (data);
cs = new CryptoStream (decrypted, des.CreateDecryptor (key, iv), CryptoStreamMode.Read);
int len = cs.Read (data, 0, 6);
Assert.AreEqual (6, len, "Length (1st pass)");
Assert.AreEqual ("xim", Encoding.Unicode.GetString (data, 0, len), "Partial DES Roundtrip");
len += cs.Read (data, 6, 8);
Assert.AreEqual (12, len, "Length (1st+2nd)");
Assert.AreEqual ("ximian", Encoding.Unicode.GetString (data, 0, len), "Full DES Roundtrip");
cs.Close ();
}
public void WriteByteReadByte ()
{
DebugStream original = new DebugStream (Encoding.Unicode.GetBytes ("ximian"));
DebugStream encrypted = new DebugStream ();
byte[] key = {0, 1, 2, 3, 4, 5, 6, 7};
byte[] iv = {0, 1, 2, 3, 4, 5, 6, 7};
DES des = DES.Create ();
cs = new CryptoStream (encrypted, des.CreateEncryptor (key, iv), CryptoStreamMode.Write);
int data;
while ((data = original.ReadByte ()) != -1)
cs.WriteByte((byte) data);
cs.Close ();
byte[] result = encrypted.ToArray ();
Assert.AreEqual ("18-EA-93-3F-20-86-D2-AA-78-02-D7-6F-E4-47-17-9C", BitConverter.ToString (result), "Encrypted");
encrypted = new DebugStream (result);
DebugStream decrypted = new DebugStream ();
cs = new CryptoStream (encrypted, des.CreateDecryptor (key, iv), CryptoStreamMode.Read);
while ((data = cs.ReadByte ()) != -1)
decrypted.WriteByte((byte) data);
cs.Close ();
decrypted.Close ();
Assert.AreEqual ("ximian", Encoding.Unicode.GetString (decrypted.ToArray ()), "W/R Byte Roundtrip");
}
// Adapted from Subba Rao Thirumoorthy email on mono-devel-list (december 2003)
private byte[] NonMultipleOfBlockSize_Encrypt (ICryptoTransform ct, byte[] data)
{
DebugStream stream = new DebugStream ();
CryptoStream CryptStream = new CryptoStream (stream, ct, CryptoStreamMode.Write);
int len = 0;
long myLength = 0;
byte[] Buffer = new byte [1024];
DebugStream fout = new DebugStream (data);
while (myLength < data.Length) {
len = fout.Read (Buffer, 0, 1023);
if (len == 0)
break;
CryptStream.Write (Buffer, 0, len);
CryptStream.Flush ();
myLength = myLength + len;
}
CryptStream.FlushFinalBlock ();
// we must ensure that the result is correct
Assert.AreEqual (64, len, "Length(final)");
byte[] result = stream.ToArray ();
string end = BitConverter.ToString (result, 65520, 16);
Assert.AreEqual ("04-70-19-1D-28-C5-BD-9A-23-C6-60-E2-28-96-38-65", end, "End part");
CryptStream.Close();
stream.Close();
return result;
}
private byte[] NonMultipleOfBlockSize_Decrypt (ICryptoTransform ct, byte[] data)
{
DebugStream stream = new DebugStream (data);
CryptoStream CryptStream = new CryptoStream (stream, ct, CryptoStreamMode.Read);
int len = 0;
long myLength = 0;
byte[] Buffer = new Byte [1024];
DebugStream fout = new DebugStream ();
// each returned block must be 1023 bytes long
// even if this isn't a multiple of the block size
while ((len = CryptStream.Read (Buffer, 0, 1023)) != 0) {
fout.Write (Buffer, 0, len);
fout.Flush ();
myLength = myLength + len;
}
byte[] result = fout.ToArray ();
CryptStream.Close ();
stream.Close ();
return result;
}
public void PartialRoundtripRead ()
{
byte[] encrypted;
using (DebugStream mem1 = new DebugStream ()) {
byte[] toEncrypt = Encoding.Unicode.GetBytes ("Please encode me!");
using (CryptoStream crypt = new CryptoStream (mem1, aes.CreateEncryptor (), CryptoStreamMode.Write)) {
crypt.Write (toEncrypt, 0, toEncrypt.Length);
crypt.FlushFinalBlock ();
}
encrypted = mem1.ToArray ();
}
using (DebugStream mem2 = new DebugStream (encrypted)) {
byte[] buffer = new byte [1024];
CryptoStream cr = new CryptoStream (mem2, aes.CreateDecryptor (), CryptoStreamMode.Read);
int len = cr.Read (buffer, 0, 20);
cr.Clear ();
cr.Close ();
Assert.AreEqual (20, len, "Partial Length Read");
Assert.AreEqual ("Please enc", Encoding.Unicode.GetString (buffer, 0, len), "Partial Block Read");
}
}
public void CascadedCryptoStream_Write ()
{
DebugStream debug = new DebugStream ();
// calculate both the hash (before encryption) and encrypt in one Write operation
byte[] key = {0, 1, 2, 3, 4, 5, 6, 7};
byte[] iv = {0, 1, 2, 3, 4, 5, 6, 7};
DES des = DES.Create ();
CryptoStream cse = new CryptoStream (debug, des.CreateEncryptor (key, iv), CryptoStreamMode.Write);
MD5 hash = MD5.Create ();
CryptoStream csh = new CryptoStream (cse, hash, CryptoStreamMode.Write);
byte[] data = Encoding.UTF8.GetBytes ("http://www.go-mono.com/");
csh.Write (data, 0, data.Length);
csh.FlushFinalBlock ();
byte[] result = debug.ToArray ();
Assert.AreEqual ("8C-24-76-74-09-79-2B-D3-47-C3-32-F5-F3-1A-5E-57-04-33-2E-B8-50-77-B2-A1", BitConverter.ToString (result), "Encrypted");
byte[] digest = hash.Hash;
Assert.AreEqual ("71-04-12-D1-95-01-CF-F9-8D-8F-F8-0D-F9-AA-11-7D", BitConverter.ToString (digest), "Hash");
}
public void ToBase64_Write ()
{
byte[] data = Encoding.UTF8.GetBytes ("http://www.go-mono.com/");
DebugStream debug = new DebugStream ();
ICryptoTransform base64 = new ToBase64Transform ();
cs = new CryptoStream (debug, base64, CryptoStreamMode.Write);
cs.Write (data, 0, data.Length);
cs.FlushFinalBlock ();
byte[] encoded = debug.ToArray ();
string result = Encoding.UTF8.GetString (encoded);
Assert.AreEqual ("aHR0cDovL3d3dy5nby1tb25vLmNvbS8=", result, "ToBase64_Write");
}
public void FromBase64_Write ()
{
string expected = "http://www.go-mono.com/";
byte[] data = Encoding.UTF8.GetBytes (expected);
string temp = Convert.ToBase64String (data, 0, data.Length);
data = Encoding.UTF8.GetBytes (temp);
DebugStream debug = new DebugStream ();
ICryptoTransform base64 = new FromBase64Transform ();
cs = new CryptoStream (debug, base64, CryptoStreamMode.Write);
cs.Write (data, 0, data.Length);
cs.FlushFinalBlock ();
byte[] encoded = debug.ToArray ();
string result = Encoding.UTF8.GetString (encoded);
Assert.AreEqual (expected, result, "FromBase64_Write");
}
public void DecryptPartial_TransformFinalBlock_required ()
{
byte[] key = {0, 1, 2, 3, 4, 5, 6, 7};
byte[] iv = {0, 1, 2, 3, 4, 5, 6, 7};
DES des = DES.Create ();
byte[] data = Encoding.Unicode.GetBytes ("ximian"); // 12 bytes, 1.5 DES block size
DebugStream encrypted = new DebugStream ();
cs = new CryptoStream (encrypted, des.CreateEncryptor (key, iv), CryptoStreamMode.Write);
cs.Write (data, 0, data.Length);
cs.Close ();
data = encrypted.ToArray ();
DebugStream decrypted = new DebugStream (data);
cs = new CryptoStream (decrypted, des.CreateDecryptor (key, iv), CryptoStreamMode.Read);
int len = cs.Read (data, 0, data.Length);
cs.Close ();
AssertEquals ("Length", 12, len);
AssertEquals ("Unicode DES Roundtrip", "ximian", Encoding.Unicode.GetString (data, 0, len));
}
