Create azure-ad-odp-managed.cs

Author: alexkeh

samples/azure-active-directory/azure-ad-odp-managed.cs

@@ -0,0 +1,97 @@
+// This is a simple ODP.NET, Managed Driver application that connects to an Oracle Autonomous Database
+// using a token obtained from Azure Active Directory (Azure AD).
+
+// Azure.Identity can be obtained through NuGet Gallery.
+// It will include the Azure.Core and Azure.Identity namespaces.
+using System;
+using System.Threading;
+using Azure.Core;
+using Azure.Identity;
+using Oracle.ManagedDataAccess.Client;
+
+namespace ConnectToOracleUsingAccessToken
+{
+  class Program
+  {
+    static void Main()
+    {
+      try
+      {
+        // Retrieve an access token from Azure AD.
+        string token = GetAccessToken();
+
+        // Create an instance of an OracleAccessToken.  The access token needs to
+        // be passed to the OracleAccessToken constructor as array of characters.
+        var oracleAccessToken = new OracleAccessToken(token.ToCharArray());
+
+        // Create an instance of an OracleConnection object.
+        // The developer must provide the appropriate data source setting.
+        var connection = new OracleConnection("User Id=/;Data Source=<oracle>");
+
+        // tnsnames.ora, sqlnet.ora, and cwallet.sso must reside in the same
+        // directory as the application executable.  These files can be downloaded
+        // from Oracle Cloud for the Oracle Autonomous DB instance.
+        connection.TnsAdmin = @".\";
+
+        // Assign the OracleAccessToken to the AccessToken property on the
+        // OracleConnection object.
+        connection.AccessToken = oracleAccessToken;
+
+        // Open the connection.
+        connection.Open();
+
+        // If Open() fails, it will throw an exception.
+        Console.WriteLine("Open success.");
+
+        // Dispose the OracleConnection object.
+        connection.Dispose();
+      }
+      catch (Exception ex)
+      {
+        Console.WriteLine(ex);
+      }
+    }
+
+    // Retrieves an Azure AD access token through the
+    // Service Principal Auth flow using a client secret.
+    static string GetAccessToken()
+    {
+      // The developer must configure the Azure AD parameters below.
+      string clientId = "<client Id of app registration in Azure AD>";
+      string tenantId = "<tenant Id of Azure AD>";
+      string clientSecret = "<secret value of app registration in Azure AD>";
+      string scope = "<scope of DB registration in Azure AD>";
+
+      // Create a TokenRequestContext object.
+      var tokenRequestContext = new TokenRequestContext(new[] { scope });
+
+      // Create a ClientSecretCredential object.
+      var credentials = new ClientSecretCredential(tenantId, clientId, clientSecret);
+
+      // Get the access token from Azure AD.
+      AccessToken accessToken = credentials.GetToken(tokenRequestContext, default(CancellationToken));
+
+      // Return the access token.
+      return accessToken.Token;
+    }
+  }
+}
+
+/* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved. */
+
+/******************************************************************************
+ *
+ * You may not use the identified files except in compliance with The MIT
+ * License (the "License.")
+ *
+ * You may obtain a copy of the License at
+ * https://github.com/oracle/Oracle.NET/blob/master/LICENSE
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *****************************************************************************/