public void EncryptDecryptBasic()
{
Substitution sub = new Substitution(new Alphabet("PHQGIUMEAYLNOFDXJKRCVSTZWB"));
var encrypted = sub.Encrypt(TextExample);
Assert.AreEqual("GIUIFGCEIIPRCTPNN", encrypted);
var decrypted = sub.Decrypt(encrypted);
Assert.AreEqual(TextExample, decrypted);
}
public IActionResult EncryptMessage([FromBody] VigenereModel message)
{
var plainText = message.Message;
var alphabet = message.Alphabet;
var password = message.Password;
Substitution cipher = new Substitution(alphabet);
message.Message = cipher.Encrypt(plainText, password);
return(Json(message));
}
/// <summary>
/// Converts a missiong information into a password.
/// </summary>
/// <param name="info">Mission to convert.</param>
/// <returns>The password.</returns>
public static string Convert(WonderSMail info)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
// Serialize the structure into a bit stream
DataStream stream = new DataStream();
BitWriter writer = new BitWriter(stream);
writer.Write(info.MailType, 4);
writer.Write(info.MissionType, 4);
writer.Write(info.MissionSubType, 4);
writer.Write(info.SourceClientId, 11);
writer.Write(info.TargetClientId, 11);
writer.Write(info.TargetClientFemale, 11);
writer.Write(info.RewardObjectId, 10);
writer.Write(info.RewardType, 4);
writer.Write(info.RewardId, 11);
writer.Write(info.RestrictionType, 1);
writer.Write(info.RestrictionParam, 11);
writer.Write(info.Random, 24);
writer.Write(info.LocationId, 8);
writer.Write(info.FloorNumber, 8);
writer.Write(info.Requirement, 8);
// Write the stream into an array for the rounds.
// We allocate an extra space for the checksum (first uint)
// and the null terminator (last byte).
byte[] binary = new byte[stream.Length + 5];
stream.Position = 0;
stream.Read(binary, 4, (int)stream.Length);
// Create checksum
uint crc32 = Crc32.Calculate(binary, 4, binary.Length - 5);
byte[] crc32Bytes = BitConverter.GetBytes(crc32);
binary[0] = crc32Bytes[0];
binary[1] = crc32Bytes[1];
binary[2] = crc32Bytes[2];
binary[3] = crc32Bytes[3];
// Do encryption rounds
// The key is the checksum, we don't encrypt the null terminator.
Scramble.Encrypt(crc32Bytes[0], binary, 4, binary.Length - 5);
string password = Substitution.Encrypt(binary, PasswordLength);
password = Permutation.Encrypt(password, false);
return(password);
}
/// <summary>
/// Converts a missiong information into a password.
/// </summary>
/// <param name="info">Mission to convert.</param>
/// <returns>The password.</returns>
public static string Convert(MissionMail info)
{
if (info == null)
{
throw new ArgumentNullException(nameof(info));
}
// Serialize the structure into a bit stream
DataStream stream = new DataStream();
BitWriter writer = new BitWriter(stream);
writer.Write((byte)info.Type, 4);
writer.Write(info.LocationId, 7);
writer.Write(info.FloorNumber, 7);
if (info.Type == MissionState.Sos)
{
writer.Write(info.Random, 24);
}
writer.Write(info.UID, 64);
writer.Write((byte)info.ClientLanguage, 4);
writer.Write(info.ClientName, 80, EncodingName);
if (info.Type != MissionState.Sos)
{
writer.Write(info.ObjectID1, 10);
writer.Write(info.ObjectID2, 10);
}
writer.Write(info.RescuerUID, 64);
writer.Write((byte)info.GameType, 2);
// Write the stream into an array for the rounds.
// We allocate an extra space for the checksum (first byte)
// and the null terminator (last byte).
byte[] binary = new byte[stream.Length + 2];
stream.Position = 0;
stream.Read(binary, 1, binary.Length - 2);
// Create checksum
byte checksum = Checksum.Calculate(binary, 1, binary.Length - 1);
binary[0] = checksum;
// Do encryption rounds
// The key is the checksum, we don't encrypt the null terminator.
Scramble.Encrypt(checksum, binary, 1, binary.Length - 2);
string password = Substitution.Encrypt(binary, PasswordLength);
password = Permutation.Encrypt(password, true);
return(password);
}
public void Multigraph_SubstitutionTest()
{
Substitution substitution = new Substitution(Utility.KeyedEnglishAlphabet("KRYPTOS").ToStringArray());
for (int i = 0; i < 25; i++)
{
substitution.Key = substitution.ScrambledAlphabet();
generated = substitution.GenerateRandomLetters();
cipher = substitution.Encrypt(generated);
clear = substitution.Decrypt(cipher);
CollectionAssert.AreEqual(generated, clear);
}
}
public void Unigraph_SubstitutionTest()
{
Substitution substitution = new Substitution(Utility.KeyedEnglishAlphabet("KRYPTOS"));
cipher = "";
clear = "";
generated = "";
for (int i = 0; i < 25; i++)
{
substitution.Key = substitution.ScrambledAlphabet();
generated = substitution.GenerateRandomString();
cipher = substitution.Encrypt(generated);
clear = substitution.Decrypt(cipher);
Assert.AreEqual(generated, clear);
}
}