Exemplo n.º 1
0
        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}");
        }