Added AddCredentials.

Author: tyranid

NtApiDotNet/Win32/Security/Authentication/CredentialHandle.cs

@@ -231,6 +231,37 @@ public IServerAuthenticationContext CreateServer(AcceptContextReqFlags req_attri
             return ServerAuthenticationContext.Create(this, req_attributes, channel_binding, data_rep, owns_credentials);
         }
 
+        /// <summary>
+        /// Add credentials to the handle.
+        /// </summary>
+        /// <param name="principal">User principal.</param>
+        /// <param name="package">The package name.</param>
+        /// <param name="cred_use_flag">Credential user flags.</param>
+        /// <param name="auth_data">Optional authentication data.</param>
+        public void AddCredentials(string principal, string package, SecPkgCredFlags cred_use_flag, SafeBuffer auth_data)
+        {
+            LargeInteger timestamp = new LargeInteger();
+            SecurityNativeMethods.AddCredentials(CredHandle, principal, package, cred_use_flag, auth_data, IntPtr.Zero, IntPtr.Zero, timestamp).CheckResult();
+        }
+
+        /// <summary>
+        /// Add credentials to the handle.
+        /// </summary>
+        /// <param name="principal">User principal.</param>
+        /// <param name="package">The package name.</param>
+        /// <param name="cred_use_flag">Credential user flags.</param>
+        /// <param name="credentials">Optional credentials.</param>
+        public void AddCredentials(string principal, string package, SecPkgCredFlags cred_use_flag, AuthenticationCredentials credentials)
+        {
+            using (var list = new DisposableList())
+            {
+                using (var buffer = credentials.ToBuffer(list, package))
+                {
+                    AddCredentials(principal, package, cred_use_flag, buffer);
+                }
+            }
+        }
+
         /// <summary>
         /// Finalizer.
         /// </summary>

NtApiDotNet/Win32/Security/Native/SecurityNativeMethods.cs

@@ -61,6 +61,18 @@ [Out] LargeInteger ptsExpiry
         [DllImport("Secur32.dll", CharSet = CharSet.Unicode)]
         internal static extern SecStatusCode FreeCredentialsHandle([In, Out] SecHandle phCredential);
 
+        [DllImport("Secur32.dll", CharSet = CharSet.Unicode)]
+        internal static extern SecStatusCode AddCredentials(
+            [In] SecHandle hCredentials,
+            string pszPrincipal,
+            string pszPackage,
+            SecPkgCredFlags fCredentialUse,
+            SafeBuffer pAuthData,
+            IntPtr pGetKeyFn,
+            IntPtr pvGetKeyArgument,
+            [Out] LargeInteger ptsExpiry
+        );
+
         [DllImport("Secur32.dll", CharSet = CharSet.Unicode)]
         internal static extern SecStatusCode InitializeSecurityContext(
             [In] SecHandle phCredential,