protected override SecurityToken ReadTokenCore(XmlReader reader, SecurityTokenResolver tokenResolver)
{
if (reader == null) throw new ArgumentNullException("reader");
if (reader.IsStartElement(Constants.CreditCardTokenName, Constants.CreditCardTokenNamespace))
{
string id = reader.GetAttribute(Constants.Id, Constants.WsUtilityNamespace);
reader.ReadStartElement();
// read the credit card number
string creditCardNumber = reader.ReadElementString(Constants.CreditCardNumberElementName, Constants.CreditCardTokenNamespace);
// read the expiration date
string expirationTimeString = reader.ReadElementString(Constants.CreditCardExpirationElementName, Constants.CreditCardTokenNamespace);
DateTime expirationTime = XmlConvert.ToDateTime(expirationTimeString, XmlDateTimeSerializationMode.Utc);
// read the issuer of the credit card
string creditCardIssuer = reader.ReadElementString(Constants.CreditCardIssuerElementName, Constants.CreditCardTokenNamespace);
reader.ReadEndElement();
CreditCardInfo cardInfo = new CreditCardInfo(creditCardNumber, creditCardIssuer, expirationTime);
return new CreditCardToken(cardInfo, id);
}
else
{
return WSSecurityTokenSerializer.DefaultInstance.ReadToken(reader, tokenResolver);
}
}
/// <summary>
/// Helper method to check if a given credit card entry is present in the User DB
/// </summary>
private bool IsCardNumberAndExpirationValid(CreditCardInfo cardInfo)
{
try
{
using (StreamReader myStreamReader = new StreamReader(this.creditCardsFile))
{
string line = "";
while ((line = myStreamReader.ReadLine()) != null)
{
string[] splitEntry = line.Split('#');
if (splitEntry[0] == cardInfo.CardNumber)
{
string expirationDateString = splitEntry[1].Trim();
DateTime expirationDateOnFile = DateTime.Parse(expirationDateString, System.Globalization.DateTimeFormatInfo.InvariantInfo, System.Globalization.DateTimeStyles.AdjustToUniversal);
if (cardInfo.ExpirationDate == expirationDateOnFile)
{
string issuer = splitEntry[2];
return issuer.Equals(cardInfo.CardIssuer, StringComparison.InvariantCultureIgnoreCase);
}
else
{
return false;
}
}
}
return false;
}
}
catch (Exception e)
{
throw new Exception("BookStoreService: Error while retrieving credit card information from User DB " + e.ToString());
}
}
public CreditCardClientCredentials(CreditCardInfo creditCardInfo)
: base()
{
if (creditCardInfo == null)
throw new ArgumentNullException("creditCardInfo");
this.creditCardInfo = creditCardInfo;
}
public CreditCardTokenProvider(CreditCardInfo creditCardInfo)
: base()
{
if (creditCardInfo == null)
{
throw new ArgumentNullException("creditCardInfo");
}
this.creditCardInfo = creditCardInfo;
}
public CreditCardToken(CreditCardInfo cardInfo, string id)
{
if (cardInfo == null)
throw new ArgumentNullException("cardInfo");
if (id == null)
throw new ArgumentNullException("id");
this.cardInfo = cardInfo;
this.id = id;
// the credit card token is not capable of any crypto
this.securityKeys = new ReadOnlyCollection<SecurityKey>(new List<SecurityKey>());
}
public CreditCardToken(CreditCardInfo cardInfo)
: this(cardInfo, Guid.NewGuid().ToString())
{
}
public CreditCardToken(CreditCardInfo cardInfo) : this(cardInfo, Guid.NewGuid().ToString())
{
}
