public static string GetAuthenticationHeader()

in ServiceSamples/AuthenticationUtility/OAuthHelper.cs [21:78]
48 lines of code
6 McCabe index (conditional complexity)

        public static string GetAuthenticationHeader(bool useWebAppAuthentication = false)
        {
            string aadTenant = ClientConfiguration.Default.ActiveDirectoryTenant;
            string aadClientAppId = ClientConfiguration.Default.ActiveDirectoryClientAppId;
            string aadClientAppSecret = ClientConfiguration.Default.ActiveDirectoryClientAppSecret;
            string aadResource = ClientConfiguration.Default.ActiveDirectoryResource;

            AuthenticationContext authenticationContext = new AuthenticationContext(aadTenant, false);
            AuthenticationResult authenticationResult;

            if (useWebAppAuthentication)
            {
                if (string.IsNullOrEmpty(aadClientAppSecret))
                {
                    Console.WriteLine("Please fill AAD application secret in ClientConfiguration if you choose authentication by the application.");
                    throw new Exception("Failed OAuth by empty application secret.");
                }

                try
                {
                    // OAuth through application by application id and application secret.
                    var creadential = new ClientCredential(aadClientAppId, aadClientAppSecret);
                    authenticationResult = authenticationContext.AcquireTokenAsync(aadResource, creadential).Result;
                }
                catch (Exception ex)
                {
                    Console.WriteLine(string.Format("Failed to authenticate with AAD by application with exception {0} and the stack trace {1}", ex.ToString(), ex.StackTrace));
                    throw new Exception("Failed to authenticate with AAD by application.");
                }
            }
            else
            {
                // OAuth through username and password.
                string username = ClientConfiguration.Default.UserName;
                string password = ClientConfiguration.Default.Password;

                if (string.IsNullOrEmpty(password))
                {
                    Console.WriteLine("Please fill user password in ClientConfiguration if you choose authentication by the credential.");
                    throw new Exception("Failed OAuth by empty password.");
                }

                try
                {
                    // Get token object
                    var userCredential = new UserPasswordCredential(username, password); ;
                    authenticationResult = authenticationContext.AcquireTokenAsync(aadResource, aadClientAppId, userCredential).Result;
                }
                catch (Exception ex)
                {
                    Console.WriteLine(string.Format("Failed to authenticate with AAD by the credential with exception {0} and the stack trace {1}", ex.ToString(), ex.StackTrace));
                    throw new Exception("Failed to authenticate with AAD by the credential.");
                }
            }

            // Create and get JWT token
            return authenticationResult.CreateAuthorizationHeader();
        }