private string DecodePassword(string dbpassword, string salt, MembershipPasswordFormat?format)
{
switch (format ?? this.PasswordFormat)
{
case MembershipPasswordFormat.Clear:
case MembershipPasswordFormat.Hashed:
return(dbpassword);
case MembershipPasswordFormat.Encrypted:
{
string result = string.Empty;
if (this.EncryptionAlgorithm.ToUpper() == "DPAPI")
{
result = EncryptionManager.DecryptDPAPI(dbpassword);
}
else
{
if (!Enum.IsDefined(typeof(RijndaelSimpleHashAlgorithm), this.EncryptionAlgorithm))
{
throw new ProviderException("Encryption algorithm not valid. Possible values are " + DebugUtility.GetDebugString(typeof(RijndaelSimpleHashAlgorithm)) + " and DPAPI");
}
result = EncryptionManager.AES_Simple_Decrypt(dbpassword, this.PasswordPassphrase, salt, this.PasswordInitVector, (RijndaelSimpleHashAlgorithm)Enum.Parse(typeof(RijndaelSimpleHashAlgorithm), this.EncryptionAlgorithm), RijndaelSimpleKeySize.Medium, 3);
}
return(result);
}
default:
throw new NotImplementedException(("MembershipPasswordFormat " + format) ?? (this.PasswordFormat + " not implemented."));
}
}