public static byte[] Decode(string encodedData, MachineKeyProtection protectionOption)
{
if (encodedData == null)
{
throw new ArgumentNullException("encodedData");
}
if ((encodedData.Length % 2) != 0)
{
throw new ArgumentException(null, "encodedData");
}
byte[] buf = null;
try
{
buf = MachineKeySection.HexStringToByteArray(encodedData);
}
catch
{
throw new ArgumentException(null, "encodedData");
}
if ((buf == null) || (buf.Length < 1))
{
throw new ArgumentException(null, "encodedData");
}
if ((protectionOption == MachineKeyProtection.All) || (protectionOption == MachineKeyProtection.Encryption))
{
buf = MachineKeySection.EncryptOrDecryptData(false, buf, null, 0, buf.Length, false, false, IVType.Random, !AppSettings.UseLegacyMachineKeyEncryption);
if (buf == null)
{
return(null);
}
}
if ((protectionOption == MachineKeyProtection.All) || (protectionOption == MachineKeyProtection.Validation))
{
if (buf.Length < MachineKeySection.HashSize)
{
return(null);
}
byte[] src = buf;
buf = new byte[src.Length - MachineKeySection.HashSize];
Buffer.BlockCopy(src, 0, buf, 0, buf.Length);
byte[] buffer3 = MachineKeySection.HashData(buf, null, 0, buf.Length);
if ((buffer3 == null) || (buffer3.Length != MachineKeySection.HashSize))
{
return(null);
}
for (int i = 0; i < buffer3.Length; i++)
{
if (buffer3[i] != src[buf.Length + i])
{
return(null);
}
}
}
return(buf);
}
public static FormsAuthenticationTicket Decrypt(string encryptedTicket)
{
if (string.IsNullOrEmpty(encryptedTicket) || (encryptedTicket.Length > 0x1000))
{
throw new ArgumentException(System.Web.SR.GetString("InvalidArgumentValue", new object[] { "encryptedTicket" }));
}
Initialize();
byte[] buf = null;
if ((encryptedTicket.Length % 2) == 0)
{
try
{
buf = MachineKeySection.HexStringToByteArray(encryptedTicket);
}
catch
{
}
}
if (buf == null)
{
buf = HttpServerUtility.UrlTokenDecode(encryptedTicket);
}
if ((buf == null) || (buf.Length < 1))
{
throw new ArgumentException(System.Web.SR.GetString("InvalidArgumentValue", new object[] { "encryptedTicket" }));
}
if ((_Protection == FormsProtectionEnum.All) || (_Protection == FormsProtectionEnum.Encryption))
{
buf = MachineKeySection.EncryptOrDecryptData(false, buf, null, 0, buf.Length, false, false, IVType.Random);
if (buf == null)
{
return(null);
}
}
int length = buf.Length;
if ((_Protection == FormsProtectionEnum.All) || (_Protection == FormsProtectionEnum.Validation))
{
if (!MachineKeySection.VerifyHashedData(buf))
{
return(null);
}
length -= MachineKeySection.HashSize;
}
if (!AppSettings.UseLegacyFormsAuthenticationTicketCompatibility)
{
return(FormsAuthenticationTicketSerializer.Deserialize(buf, length));
}
int capacity = (length > 0x1000) ? 0x1000 : length;
StringBuilder szName = new StringBuilder(capacity);
StringBuilder szData = new StringBuilder(capacity);
StringBuilder szPath = new StringBuilder(capacity);
byte[] pBytes = new byte[4];
long[] pDates = new long[2];
if (System.Web.UnsafeNativeMethods.CookieAuthParseTicket(buf, length, szName, capacity, szData, capacity, szPath, capacity, pBytes, pDates) != 0)
{
return(null);
}
DateTime issueDate = DateTime.FromFileTime(pDates[0]);
return(new FormsAuthenticationTicket(pBytes[0], szName.ToString(), issueDate, DateTime.FromFileTime(pDates[1]), pBytes[1] != 0, szData.ToString(), szPath.ToString()));
}
