// Static Methods
/// <summary>
/// Generates an "Authenticator" value used in a RADIUS request packet sent by the client to server.
/// </summary>
/// <param name="sharedSecret">The shared secret to be used in generating the output.</param>
/// <returns>A byte array.</returns>
public static byte[] CreateRequestAuthenticator(string sharedSecret)
{
// We create a input buffer that'll be used to create a 16-byte value using the RSA MD5 algorithm.
// Since the output value (The Authenticator) has to be unique over the life of the shared secret,
// we prepend a randomly generated "salt" text to ensure the uniqueness of the output value.
byte[] randomBuffer = new byte[16];
byte[] secretBuffer = Encoding.GetBytes(sharedSecret);
Random.GetBytes(randomBuffer);
return(new MD5CryptoServiceProvider().ComputeHash(randomBuffer.Combine(secretBuffer)));
}
private string IssueAuthenticationToken(string username, string password)
{
byte[] buffer = new byte[9];
// Generate the selector for the token
Random.GetBytes(buffer);
string selector = Convert.ToBase64String(buffer);
// Generate the validator for the token
Random.GetBytes(buffer);
string validator = Convert.ToBase64String(buffer);
// Determine where the credential cache is located
ConfigurationFile configFile = ConfigurationFile.Current;
CategorizedSettingsElementCollection systemSettings = configFile.Settings["systemSettings"];
string configurationCachePath = systemSettings["ConfigurationCachePath"].Value;
string credentialCachePath = Path.Combine(configurationCachePath, "CredentialCache.bin");
// Open the credential cache
lock (s_credentialCacheLock)
{
using (FileBackedDictionary <string, Credential> credentialCache = new FileBackedDictionary <string, Credential>(credentialCachePath))
{
// Clean out expired credentials before issuing a new one
DateTime now = DateTime.UtcNow;
List <string> expiredSelectors = credentialCache
.Where(kvp => now >= kvp.Value.Expiration)
.Select(kvp => kvp.Key)
.ToList();
foreach (string expiredSelector in expiredSelectors)
{
credentialCache.Remove(expiredSelector);
}
credentialCache.Compact();
// Enter the new token into the credential cache
credentialCache[selector] = new Credential
{
Validator = validator,
Username = username,
Password = password,
Expiration = DateTime.UtcNow.AddDays(30.0D)
};
}
}
return($"{selector}:{validator}");
}
private static byte[] GenerateNewToken(int bitLength)
{
byte[] data = new byte[bitLength / 8];
Random.GetBytes(data);
return(data);
}
public void DataSetSerialization_ValidCase()
{
const int RowCount = ushort.MaxValue; // * 10;// * 20;
//Act
StringBuilder results = new StringBuilder();
Ticks stopTime, startTime;
DataSet sourceDataSet = new DataSet("source");
DataTable table = sourceDataSet.Tables.Add("table1");
table.Columns.Add("col0", typeof(string));
table.Columns.Add("col1", typeof(int));
table.Columns.Add("col2", typeof(bool));
table.Columns.Add("col3", typeof(Guid));
table.Columns.Add("col4", typeof(DateTime));
table.Columns.Add("col5", typeof(TimeSpan));
table.Columns.Add("col6", typeof(byte[]));
startTime = DateTime.UtcNow.Ticks;
for (int i = 0; i < RowCount; i++)
{
DataRow row = table.NewRow();
if (Random.Boolean || Random.Boolean)
{
row[0] = new string((char)Random.Int16Between(32, 128), Random.Int16Between(5, 30));
}
else
{
row[0] = DBNull.Value;
}
row[1] = Random.Int32;
row[2] = Random.Boolean;
if (Random.Boolean || Random.Boolean)
{
row[3] = Guid.NewGuid();
}
else
{
row[3] = DBNull.Value;
}
row[4] = DateTime.UtcNow;
row[5] = new TimeSpan(Random.Int64Between(Ticks.PerSecond, Ticks.PerHour));
byte[] bytes = null;
if (Random.Boolean || Random.Boolean)
{
bytes = new byte[Random.Int16Between(0, 1000)];
Random.GetBytes(bytes);
}
row[6] = bytes;
table.Rows.Add(row);
}
table = sourceDataSet.Tables.Add("table2");
table.Columns.Add("col0", typeof(ulong));
table.Columns.Add("col1", typeof(double));
table.Columns.Add("col2", typeof(byte));
table.Columns.Add("col3", typeof(char));
table.Columns.Add("col4", typeof(object));
for (int i = 0; i < Random.Int32Between(100, 500); i++)
{
DataRow row = table.NewRow();
if (Random.Boolean || Random.Boolean)
{
row[0] = Random.UInt64;
}
else
{
row[0] = DBNull.Value;
}
row[1] = Random.Number;
row[2] = Random.Byte;
if (Random.Boolean || Random.Boolean)
{
row[3] = (char)Random.Int16Between(32, 1024);
}
else
{
row[3] = DBNull.Value;
}
row[4] = Guid.NewGuid().ToString();
table.Rows.Add(row);
}
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Initial random sample dataset created with {0} rows. ({1})\r\n", RowCount, (stopTime - startTime).ToElapsedTimeString(4));
results.AppendLine();
FileStream stream;
string path = FilePath.GetApplicationDataFolder();
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
string fileName = Path.Combine(path, "DataSet.bin");
startTime = DateTime.UtcNow.Ticks;
stream = new FileStream(fileName, FileMode.Create);
sourceDataSet.SerializeToStream(stream);
stream.Flush();
stream.Close();
stream.Dispose();
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Dataset binary serialization time: {0}\r\n", (stopTime - startTime).ToElapsedTimeString(4));
string xmlFileName = Path.Combine(path, "DataSet.xml");
startTime = DateTime.UtcNow.Ticks;
sourceDataSet.WriteXml(xmlFileName, XmlWriteMode.WriteSchema);
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Dataset XML serialization time: {0}\r\n", (stopTime - startTime).ToElapsedTimeString(4));
results.AppendLine();
DataSet destinationDataSet;
startTime = DateTime.UtcNow.Ticks;
stream = new FileStream(fileName, FileMode.Open);
destinationDataSet = stream.DeserializeToDataSet();
stream.Close();
stream.Dispose();
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Dataset binary deserialization time: {0}\r\n", (stopTime - startTime).ToElapsedTimeString(4));
DataSet tempDataSet;
startTime = DateTime.UtcNow.Ticks;
tempDataSet = new DataSet();
tempDataSet.ReadXml(xmlFileName);
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Dataset XML deserialization time: {0}\r\n", (stopTime - startTime).ToElapsedTimeString(4));
results.AppendLine();
startTime = DateTime.UtcNow.Ticks;
// Validate that source and destination dataset are the same
Assert.AreEqual(sourceDataSet.DataSetName, destinationDataSet.DataSetName);
Assert.AreEqual(sourceDataSet.Tables.Count, destinationDataSet.Tables.Count);
foreach (DataTable sourceTable in sourceDataSet.Tables)
{
bool tableExists = destinationDataSet.Tables.Contains(sourceTable.TableName);
Assert.IsTrue(tableExists);
DataTable destinationTable = destinationDataSet.Tables[sourceTable.TableName];
Assert.AreEqual(sourceTable.Columns.Count, destinationTable.Columns.Count);
foreach (DataColumn sourceColumn in sourceTable.Columns)
{
bool columnExists = destinationTable.Columns.Contains(sourceColumn.ColumnName);
Assert.IsTrue(columnExists);
DataColumn destinationColumn = destinationTable.Columns[sourceColumn.ColumnName];
Assert.IsTrue(sourceColumn.DataType == destinationColumn.DataType ||
(sourceColumn.DataType == typeof(object) && destinationColumn.DataType == typeof(string)));
}
Assert.AreEqual(sourceTable.Rows.Count, destinationTable.Rows.Count);
for (int i = 0; i < sourceTable.Rows.Count; i++)
{
DataRow sourceRow = sourceTable.Rows[i];
DataRow destinationRow = destinationTable.Rows[i];
for (int j = 0; j < sourceTable.Columns.Count; j++)
{
if (sourceRow[j] != DBNull.Value && destinationRow[j] != DBNull.Value)
{
byte[] bytes = sourceRow[j] as byte[];
if ((object)bytes != null)
{
Assert.IsTrue(bytes.CompareTo((byte[])destinationRow[j]) == 0);
}
else
{
Assert.AreEqual(sourceRow[j], destinationRow[j]);
}
}
}
}
}
stopTime = DateTime.UtcNow.Ticks;
results.AppendFormat("Dataset validation time: {0}\r\n", (stopTime - startTime).ToElapsedTimeString(4));
results.AppendLine();
FileInfo xmlFile = new FileInfo(xmlFileName);
FileInfo binFile = new FileInfo(fileName);
results.AppendFormat("Binary serialization size = {0}\r\n", SI2.ToScaledString(binFile.Length, "B"));
results.AppendFormat("XML serialization size = {0}\r\n", SI2.ToScaledString(xmlFile.Length, "B"));
results.AppendFormat("Size Improvement = {0:0.00%}\r\n", (xmlFile.Length - binFile.Length) / (double)xmlFile.Length);
System.Console.WriteLine(results.ToString());
}
static CryptoSystem()
{
// Added entropy makes tokens unique to AppDomain instance of this class
Random.GetBytes(s_entropy);
}
