Add back IsRecoverableException methods.

src/Microsoft.IdentityModel.Tokens/TokenUtilities.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
 using System;
@@ -243,6 +243,17 @@ internal static IEnumerable<Claim> MergeClaims(IEnumerable<Claim> claims, IEnume
             return result;
         }
 
+        /// <summary>
+        /// Should not be used. Exists only for backwards compatibility.
+        /// Check whether the given exception type is recoverable by LKG.
+        /// </summary>
+        /// <param name="exception">The exception to check.</param>
+        /// <returns><c>true</c> if the exception is certain types of exceptions otherwise, <c>false</c>.</returns>
+        internal static bool IsRecoverableException(Exception exception)
+        {
+            return IsRecoverableException(exception, false);
+        }
+
         /// <summary>
         /// Check whether the given exception type is recoverable by LKG.
         /// Decryption error is only recoverable, if the configuration has decryption keys in it.
@@ -291,6 +302,17 @@ internal static bool IsRecoverableConfiguration(string kid, BaseConfiguration cu
             return false;
         }
 
+        /// <summary>
+        /// Should not be used. Exists only for backwards compatibility.
+        /// Check whether the given exception type is recoverable by LKG.
+        /// </summary>
+        /// <param name="exceptionType">The exception type to check</param>
+        /// <returns><c>true</c> if the exception is certain types of exceptions otherwise, <c>false</c>.</returns>
+        internal static bool IsRecoverableExceptionType(Type exceptionType)
+        {
+            return IsRecoverableExceptionType(exceptionType, false);
+        }
+
         /// <summary>
         /// Check whether the given exception type is recoverable by LKG.
         /// </summary>

test/Microsoft.IdentityModel.Tokens.Tests/TokenUtilitiesTests.cs

@@ -0,0 +1,74 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using Xunit;
+
+namespace Microsoft.IdentityModel.Tokens.Tests
+{
+    public class TokenUtilitiesTests
+    {
+        [Theory]
+        [InlineData(typeof(SecurityTokenInvalidSignatureException), false, true)]
+        [InlineData(typeof(SecurityTokenInvalidIssuerException), false, true)]
+        [InlineData(typeof(SecurityTokenSignatureKeyNotFoundException), false, true)]
+        [InlineData(typeof(SecurityTokenDecryptionFailedException), false, false)]
+        [InlineData(typeof(SecurityTokenDecryptionFailedException), true, true)]
+        [InlineData(typeof(ArgumentNullException), false, false)]
+        [InlineData(typeof(ArgumentException), false, false)]
+        [InlineData(typeof(SecurityTokenValidationException), false, false)]
+        public void IsRecoverableException_ReturnsExpectedResult(Type exceptionType, bool configContainsDecryptionKeys, bool expected)
+        {
+            Exception exception = (Exception)Activator.CreateInstance(exceptionType);
+
+            bool result = TokenUtilities.IsRecoverableException(exception, configContainsDecryptionKeys);
+
+            Assert.Equal(expected, result);
+        }
+
+        [Fact]
+        public void IsRecoverableException_WithoutDecryptionKeysParameter_ReturnsFalse()
+        {
+            var exception = new SecurityTokenDecryptionFailedException();
+
+            bool result = TokenUtilities.IsRecoverableException(exception);
+
+            Assert.False(result);
+        }
+
+        [Fact]
+        public void IsRecoverableException_WithNullException_ReturnsFalse()
+        {
+            bool result = TokenUtilities.IsRecoverableException(null);
+
+            Assert.False(result);
+        }
+
+        [Theory]
+        [InlineData(typeof(SecurityTokenInvalidSignatureException), false, true)]
+        [InlineData(typeof(SecurityTokenInvalidIssuerException), false, true)]
+        [InlineData(typeof(SecurityTokenSignatureKeyNotFoundException), false, true)]
+        [InlineData(typeof(SecurityTokenDecryptionFailedException), false, false)]
+        [InlineData(typeof(SecurityTokenDecryptionFailedException), true, true)]
+        [InlineData(typeof(ArgumentNullException), false, false)]
+        [InlineData(typeof(ArgumentException), false, false)]
+        [InlineData(typeof(SecurityTokenValidationException), false, false)]
+        [InlineData(null, false, false)]
+        public void IsRecoverableExceptionType_ReturnsExpectedResult(Type exceptionType, bool configContainsDecryptionKeys, bool expected)
+        {
+            bool result = TokenUtilities.IsRecoverableExceptionType(exceptionType, configContainsDecryptionKeys);
+
+            Assert.Equal(expected, result);
+        }
+
+        [Fact]
+        public void IsRecoverableExceptionType_WithoutDecryptionKeysParameter_ReturnsFalse()
+        {
+            var exceptionType = typeof(SecurityTokenDecryptionFailedException);
+
+            bool result = TokenUtilities.IsRecoverableExceptionType(exceptionType);
+
+            Assert.False(result);
+        }
+    }
+}