feat(auth): add new authenticator methods

Author: mamoonraja

Authentication/Authenticator.cs

@@ -0,0 +1,81 @@
+/**
+* Copyright 2019 IBM Corp. All Rights Reserved.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* 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.
+*
+*/
+
+using IBM.Cloud.SDK.Connection;
+
+namespace IBM.Cloud.SDK.Authentication
+{
+    public class Authenticator
+    {
+        /// <summary>
+        /// These are the valid authentication types.
+        /// </summary>
+        public const string AuthTypeBasic = "basic";
+        public const string AuthTypeNoAuth = "noAuth";
+        public const string AuthTypeIam = "iam";
+        public const string AuthTypeCp4d = "cp4d";
+        public const string AuthTypeBearer = "bearerToken";
+
+        /// <summary>
+        /// Constants which define the names of external config propreties (credential file, environment variable, etc.).
+        /// </summary>
+        public static string PropNameAuthType = "AUTH_TYPE";
+        public static string PropNameUsername = "USERNAME";
+        public static string PropNamePassword = "PASSWORD";
+        public static string PropNameBearerToken = "BEARER_TOKEN";
+        public static string PropNameUrl = "AUTH_URL";
+        public static string PropNameDisableSslVerification = "AUTH_DISABLE_SSL";
+        public static string PropNameApikey = "APIKEY";
+        public static string PropNameClientId = "CLIENT_ID";
+        public static string PropNameClientSecret = "CLIENT_SECRET";
+
+        public static string ErrorMessagePropMissing = "The {0} property is required but was not specified.";
+        public static string ErrorMessagePropInvalid = "The {0} property is invalid. Please remove any surrounding {{, }}, or \" characters.";
+        public static string ErrorMessageReqFailed = "Error while fetching access token from token service: ";
+
+        public string Url { get; set; }
+        public string Username { get; private set; }
+        public string Password { get; private set; }
+
+        /// <summary>
+        /// Returns the authentication type associated with the Authenticator instance.
+        /// </summary>
+        virtual public string AuthenticationType { get; }
+
+        /// <summary>
+        /// Check if token data is available.
+        /// </summary>
+        virtual public bool HasTokenData() {
+            return false;
+        }
+
+        /// <summary>
+        /// Perform the necessary authentication steps for the specified request.
+        /// </summary>
+        virtual public void Authenticate(RESTConnector connector) { }
+
+        /// <summary>
+        /// Perform the necessary authentication steps for the specified request.
+        /// </summary>
+        virtual public void Authenticate(WSConnector connector) { }
+
+        /// <summary>
+        /// Validates the current set of configuration information in the Authenticator.
+        /// </summary>
+        virtual public void Validate() { }
+    }
+}

Authentication/BasicAuthenticator.cs

@@ -0,0 +1,124 @@
+/**
+* Copyright 2019 IBM Corp. All Rights Reserved.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* 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.
+*
+*/
+
+using IBM.Cloud.SDK.Connection;
+using IBM.Cloud.SDK.Utilities;
+using System;
+using System.Collections.Generic;
+using Utility = IBM.Cloud.SDK.Utilities.Utility;
+
+namespace IBM.Cloud.SDK.Authentication.BasicAuth
+{
+    /// <summary>
+    /// This class implements support for Basic Authentication. The main purpose of this authenticator is to construct the
+    /// Authorization header and then add it to each outgoing REST API request.
+    /// </summary>
+    public class BasicAuthenticator : Authenticator
+    {
+        /// <summary>
+        /// The username configured on this authenticator
+        /// </summary>
+        public string Username { get; private set; }
+        /// <summary>
+        /// The password configured on this authenticator
+        /// </summary>
+        public string Password { get; private set; }
+
+        /// <summary>
+        /// Construct a BasicAuthenticator instance with the specified username and password.
+        /// These values are used to construct an Authorization header value that will be included
+        /// in outgoing REST API requests.
+        /// </summary>
+        /// <param name="username">The basic auth username</param>
+        /// <param name="password">The basic auth password</param>
+        public BasicAuthenticator(string username, string password)
+        {
+            Init(username, password);
+        }
+
+        /// <summary>
+        /// Construct a BasicAuthenticator using properties retrieved from the specified Map.
+        /// </summary>
+        /// <param name="config">A map containing the username and password values</param>
+        public BasicAuthenticator(Dictionary<string, string> config)
+        {
+            config.TryGetValue(PropNameUsername, out string username);
+            config.TryGetValue(PropNamePassword, out string password);
+            Init(username, password);
+        }
+
+        private void Init(string username, string password)
+        {
+            Username = username;
+            Password = password;
+
+            Validate();
+        }
+
+        public override string AuthenticationType
+        {
+            get { return AuthTypeBasic; }
+        }
+
+        /// <summary>
+        /// This method is called to authenticate an outgoing REST API request.
+        /// Here, we'll just set the Authorization header to provide the necessary authentication info.
+        /// </summary>
+        /// <param name="connector"></param>
+        public override void Authenticate(RESTConnector connector)
+        {
+            connector.Headers.Add("Authorization", Utility.CreateAuthorization(Username, Password));
+        }
+
+        /// <summary>
+        /// This method is called to authenticate an outgoing REST API request.
+        /// Here, we'll just set the Authorization header to provide the necessary authentication info.
+        /// </summary>
+        /// <param name="connector"></param>
+        public override void Authenticate(WSConnector connector)
+        {
+            if (connector.Headers == null)
+            {
+                connector.Headers = new Dictionary<string,string>();;
+            }
+            connector.Headers.Add("Authorization", Utility.CreateAuthorization(Username, Password));
+        }
+
+        public override void Validate()
+        {
+            if (string.IsNullOrEmpty(Username))
+            {
+                throw new ArgumentNullException(string.Format(ErrorMessagePropMissing, "Username"));
+            }
+
+            if (string.IsNullOrEmpty(Password))
+            {
+                throw new ArgumentNullException(string.Format(ErrorMessagePropMissing, "Password"));
+            }
+
+            if (Utility.HasBadFirstOrLastCharacter(Username))
+            {
+                throw new ArgumentException(string.Format(ErrorMessagePropInvalid, "Username"));
+            }
+
+            if (Utility.HasBadFirstOrLastCharacter(Password))
+            {
+                throw new ArgumentException(string.Format(ErrorMessagePropInvalid, "Password"));
+            }
+        }
+    }
+}

Authentication/BearerTokenAuthenticator.cs

@@ -0,0 +1,93 @@
+/**
+* Copyright 2019 IBM Corp. All Rights Reserved.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* 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.
+*
+*/
+
+using IBM.Cloud.SDK.Connection;
+using IBM.Cloud.SDK.Utilities;
+using System;
+using System.Collections.Generic;
+using Utility = IBM.Cloud.SDK.Utilities.Utility;
+
+namespace IBM.Cloud.SDK.Authentication.Bearer
+{
+    /// <summary>
+    /// This class implements support for Bearer Token Authentication. The main purpose of this authenticator is to construct the
+    /// Authorization header and then add it to each outgoing REST API request.
+    /// </summary>
+    public class BearerTokenAuthenticator : Authenticator
+    {
+        /// <summary>
+        /// The access token configured for this authenticator
+        /// </summary>
+        public string BearerToken { get; set; }
+
+        /// <summary>
+        /// Construct a BearerTokenAuthenticator instance with the specified access token.
+        /// The token value will be used to construct an Authorization header that will be included
+        /// in outgoing REST API requests.
+        /// </summary>
+        /// <param name="bearerToken">The access token value</param>
+        public BearerTokenAuthenticator(string bearerToken)
+        {
+            Init(bearerToken);
+        }
+
+        /// <summary>
+        /// Construct a BearerTokenAuthenticator using properties retrieved from the specified Map.
+        /// </summary>
+        /// <param name="config">Config a map containing the access token value</param>
+        public BearerTokenAuthenticator(Dictionary<string, string> config)
+        {
+            config.TryGetValue(PropNameBearerToken, out string bearerToken);
+            Init(bearerToken);
+        }
+
+        private void Init(string bearerToken)
+        {
+            BearerToken = bearerToken;
+
+            Validate();
+        }
+
+        public override string AuthenticationType
+        {
+            get { return AuthTypeBearer; }
+        }
+
+        /// <summary>
+        /// This method is called to authenticate an outgoing REST API request.
+        /// Here, we'll just set the Authorization header to provide the necessary authentication info.
+        /// </summary>
+        /// <param name="connector"></param>
+        public override void Authenticate(RESTConnector connector)
+        {
+            connector.Headers.Add("Authorization", string.Format("Bearer {0}", BearerToken));
+        }
+
+        public override void Validate()
+        {
+            if (string.IsNullOrEmpty(BearerToken))
+            {
+                throw new ArgumentNullException(string.Format(ErrorMessagePropMissing, "BearerToken"));
+            }
+
+            if (Utility.HasBadFirstOrLastCharacter(BearerToken))
+            {
+                throw new ArgumentException(string.Format(ErrorMessagePropInvalid, "BearerToken"));
+            }
+        }
+    }
+}