Clientruntime/sanitize request header (#28169)

* fix(ClientRuntime): sanitize request headers

1. add `HttpRequestSanitizer` to sanitize headers
2. update `HttpRequestMessageWrapper` to sanitive headers during headers copy
3. add test cases

* prepare release notes of 2.3.24

sdk/mgmtcommon/ClientRuntime/ClientRuntime/HttpRequestMessageWrapper.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using Microsoft.Rest.Utilities;
 using System;
 using System.Collections.Generic;
 using System.Net.Http;
@@ -26,6 +27,7 @@ public HttpRequestMessageWrapper(HttpRequestMessage httpRequest, string content)
 
             this.CopyHeaders(httpRequest.Headers);
             this.CopyHeaders(httpRequest.GetContentHeaders());
+            HttpRequestSanitizer.SanitizerHeaders(Headers);
 
             this.Content = content;
             this.Method = httpRequest.Method;

sdk/mgmtcommon/ClientRuntime/ClientRuntime/Microsoft.Rest.ClientRuntime.csproj

@@ -3,12 +3,13 @@
     <Description>Infrastructure for error handling, tracing, and HttpClient pipeline configuration. Required by client libraries generated using AutoRest.</Description>
     <AssemblyName>Microsoft.Rest.ClientRuntime</AssemblyName>
     <AssemblyTitle>Client Runtime Library for Microsoft AutoRest Generated Clients</AssemblyTitle>
-    <Version>2.3.23</Version>
+    <Version>2.3.24</Version>
     <PackageId>Microsoft.Rest.ClientRuntime</PackageId>
     <PackageTags>Microsoft AutoRest ClientRuntime $(NugetCommonTags) $(NugetCommonProfileTags)</PackageTags>
     <PackageReleaseNotes>
       <![CDATA[
-      Added support for specifying MaxRetries in RetryAfterDelegatingHandler.
+		    - Improving sanitization of exception messages. For details, see "CVE-2022-26907 - Security Update Guide - Microsoft - Azure SDK for .NET Information Disclosure Vulnerability": https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26907
+		    - Optimize performance of parsing JSON content
       ]]>
     </PackageReleaseNotes>
   </PropertyGroup>

sdk/mgmtcommon/ClientRuntime/ClientRuntime/Utilities/HttpRequestSanitizer.cs

@@ -0,0 +1,65 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Microsoft.Rest.Utilities
+{
+    /// <summary>
+    /// Sanitizer used internall by <see cref="HttpRequestMessageWrapper"/>.
+    /// </summary>
+    internal class HttpRequestSanitizer
+    {
+        private readonly static string _redactedPlaceholder = "REDACTED";
+        private readonly static HashSet<string> _allowedHeaders = new HashSet<string>(new string[]
+        {
+            "x-ms-request-id",
+            "x-ms-client-request-id",
+            "x-ms-return-client-request-id",
+            "traceparent",
+            "MS-CV",
+
+            "Accept",
+            "Cache-Control",
+            "Connection",
+            "Content-Length",
+            "Content-Type",
+            "Date",
+            "ETag",
+            "Expires",
+            "If-Match",
+            "If-Modified-Since",
+            "If-None-Match",
+            "If-Unmodified-Since",
+            "Last-Modified",
+            "Pragma",
+            "Request-Id",
+            "Retry-After",
+            "Server",
+            "Transfer-Encoding",
+            "User-Agent",
+            "WWW-Authenticate" // OAuth Challenge header.
+            }, StringComparer.OrdinalIgnoreCase);
+
+        /// <summary>
+        /// Sanitize value of sensitive headers in the given <paramref name="headers"/>.
+        /// </summary>
+        /// <param name="headers">A collection of headers to sanitize.</param>
+        public static void SanitizerHeaders(IDictionary<string, IEnumerable<string>> headers)
+        {
+            if (headers == null)
+            {
+                return;
+            }
+
+            var namesOfHeaderToSanitize = headers.Keys.Except(_allowedHeaders, StringComparer.OrdinalIgnoreCase).ToList();
+
+            foreach (string name in namesOfHeaderToSanitize)
+            {
+                headers[name] = new string[] { _redactedPlaceholder };
+            }
+        }
+    }
+}

sdk/mgmtcommon/ClientRuntime/Tests/ClientRuntime.NetCore.Tests/HttpRequestSanitizerTest.cs

@@ -0,0 +1,96 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+namespace Microsoft.Rest.ClientRuntime.Tests
+{
+    using System.Net;
+    using System.Net.Http;
+    using System.Collections.Generic;
+    using Xunit;
+    using System.Linq;
+
+    public class HttpRequestSanitizerTest
+    {
+        [Theory]
+        [InlineData("authorization")]
+        [InlineData("Authorization")]
+        [InlineData("AUTHORIZATION")]
+        public void SanitizeAuthorizationHeader(string headerName)
+        {
+            var request = CreateRequestWrapper(headerName, "test");
+
+            Assert.True(request.Headers.TryGetValue(HttpRequestHeader.Authorization.ToString(), out IEnumerable<string> sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.NotEqual("test", sanitizedValues.First());
+            Assert.Equal("REDACTED", sanitizedValues.First());
+        }
+
+        [Theory]
+        [InlineData("custom")]
+        [InlineData("foo")]
+        [InlineData("x-ms-secret")]
+        public void SanitizeCustomHeader(string headerName)
+        {
+            var request = CreateRequestWrapper(headerName, "test");
+
+            Assert.True(request.Headers.TryGetValue(headerName, out IEnumerable<string> sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.NotEqual("test", sanitizedValues.First());
+            Assert.Equal("REDACTED", sanitizedValues.First());
+        }
+
+        [Theory]
+        [InlineData("Accept", "application/json")]
+        [InlineData("User-Agent", "azure-sdk")]
+        [InlineData("Pragma", "foo")]
+        public void KeepAllowedHeaders(string headerName, string headerValue)
+        {
+            var request = CreateRequestWrapper(headerName, headerValue);
+
+            Assert.True(request.Headers.TryGetValue(headerName, out IEnumerable<string> sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.Equal(headerValue, sanitizedValues.First());
+        }
+
+        [Theory]
+        [InlineData("accept", "Accept", "application/json")]
+        [InlineData("user-agent", "User-Agent", "azure-sdk")]
+        [InlineData("pragma", "Pragma", "foo")]
+        public void AllowedHeaderNamesAreCaseInsensitive(string headerName, string standardName, string headerValue)
+        {
+            var request = CreateRequestWrapper(headerName, headerValue);
+
+            Assert.True(request.Headers.TryGetValue(standardName, out IEnumerable<string> sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.Equal(headerValue, sanitizedValues.First());
+        }
+
+        [Fact]
+        public void OnlySanitizeNotAllowedHeader()
+        {
+            var request = CreateRequestWrapper("Authorization", "test");
+            request.Headers.Add("Pragma", new string[] { "foo" });
+            request.Headers.Add("User-Agent", new string[] { "azure-sdk" });
+
+            Assert.True(request.Headers.TryGetValue(HttpRequestHeader.Authorization.ToString(), out IEnumerable<string> sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.NotEqual("test", sanitizedValues.First());
+            Assert.Equal("REDACTED", sanitizedValues.First());
+
+            Assert.True(request.Headers.TryGetValue("Pragma", out sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.Equal("foo", sanitizedValues.First());
+
+            Assert.True(request.Headers.TryGetValue("User-Agent", out sanitizedValues));
+            Assert.Single(sanitizedValues);
+            Assert.Equal("azure-sdk", sanitizedValues.First());
+        }
+
+        private HttpRequestMessageWrapper CreateRequestWrapper(string headerName, string headerValue)
+        {
+            var request = new HttpRequestMessage();
+            request.Headers.Add(headerName, headerValue);
+            return new HttpRequestMessageWrapper(request, "");
+        }
+    }
+}

sdk/mgmtcommon/ClientRuntime/Tests/ClientRuntime.NetCore.Tests/ServiceClientTests.cs

@@ -206,7 +206,7 @@ public void HeadersAndPayloadAreNotDisposed()
                 GC.Collect();
                 Assert.NotNull(ex.Request);
                 Assert.NotNull(ex.Response);
-                Assert.Equal("2013-11-01", ex.Request.Headers["x-ms-version"].First());
+                Assert.Equal("REDACTED", ex.Request.Headers["x-ms-version"].First());
                 Assert.Equal("Text", ex.Response.Content);
             }
         }