Remove long unused UntrustedWebRequest class

This purports to check web requests but doesn't appear to actually do that.

1 files changed, 0 insertions, 230 deletions

diff --git a/OpenSim/Framework/UntrustedWebRequest.cs b/OpenSim/Framework/UntrustedWebRequest.cs
deleted file mode 100644
index e6411cc..0000000
--- a/OpenSim/Framework/UntrustedWebRequest.cs
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * Copyright (c) Contributors, http://opensimulator.org/
- * See CONTRIBUTORS.TXT for a full list of copyright holders.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the OpenSimulator Project nor the
- *       names of its contributors may be used to endorse or promote products
- *       derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Net;
-using System.Net.Security;
-using System.Text;
-using log4net;
-
-namespace OpenSim.Framework
-{
-    /// <summary>
-    /// Used for requests to untrusted endpoints that may potentially be
-    /// malicious
-    /// </summary>
-    public static class UntrustedHttpWebRequest
-    {
-        /// <summary>Setting this to true will allow HTTP connections to localhost</summary>
-        private const bool DEBUG = true;
-
-        private static readonly ILog m_log =
-                LogManager.GetLogger(
-                System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
-
-        private static readonly ICollection<string> allowableSchemes = new List<string> { "http", "https" };
-
-        /// <summary>
-        /// Creates an HttpWebRequest that is hardened against malicious
-        /// endpoints after ensuring the given Uri is safe to retrieve
-        /// </summary>
-        /// <param name="uri">Web location to request</param>
-        /// <returns>A hardened HttpWebRequest if the uri was determined to be safe</returns>
-        /// <exception cref="ArgumentNullException">If uri is null</exception>
-        /// <exception cref="ArgumentException">If uri is unsafe</exception>
-        public static HttpWebRequest Create(Uri uri)
-        {
-            return Create(uri, DEBUG, 1000 * 5, 1000 * 20, 10);
-        }
-
-        /// <summary>
-        /// Creates an HttpWebRequest that is hardened against malicious
-        /// endpoints after ensuring the given Uri is safe to retrieve
-        /// </summary>
-        /// <param name="uri">Web location to request</param>
-        /// <param name="allowLoopback">True to allow connections to localhost, otherwise false</param>
-        /// <param name="readWriteTimeoutMS">Read write timeout, in milliseconds</param>
-        /// <param name="timeoutMS">Connection timeout, in milliseconds</param>
-        /// <param name="maximumRedirects">Maximum number of allowed redirects</param>
-        /// <returns>A hardened HttpWebRequest if the uri was determined to be safe</returns>
-        /// <exception cref="ArgumentNullException">If uri is null</exception>
-        /// <exception cref="ArgumentException">If uri is unsafe</exception>
-        public static HttpWebRequest Create(Uri uri, bool allowLoopback, int readWriteTimeoutMS, int timeoutMS, int maximumRedirects)
-        {
-            if (uri == null)
-                throw new ArgumentNullException("uri");
-
-            if (!IsUriAllowable(uri, allowLoopback))
-                throw new ArgumentException("Uri " + uri + " was rejected");
-
-            HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(uri);
-            httpWebRequest.MaximumAutomaticRedirections = maximumRedirects;
-            httpWebRequest.ReadWriteTimeout = readWriteTimeoutMS;
-            httpWebRequest.Timeout = timeoutMS;
-            httpWebRequest.KeepAlive = false;
-
-            return httpWebRequest;
-        }
-
-        public static string PostToUntrustedUrl(Uri url, string data)
-        {
-            try
-            {
-                byte[] requestData = System.Text.Encoding.UTF8.GetBytes(data);
-
-                HttpWebRequest request = Create(url);
-                request.Method = "POST";
-                request.ContentLength = requestData.Length;
-                request.ContentType = "application/x-www-form-urlencoded";
-
-                using (Stream requestStream = request.GetRequestStream())
-                    requestStream.Write(requestData, 0, requestData.Length);
-
-                using (WebResponse response = request.GetResponse())
-                {
-                    using (Stream responseStream = response.GetResponseStream())
-                        return responseStream.GetStreamString();
-                }
-            }
-            catch (Exception ex)
-            {
-                m_log.Warn("POST to untrusted URL " + url + " failed: " + ex.Message);
-                return null;
-            }
-        }
-
-        public static string GetUntrustedUrl(Uri url)
-        {
-            try
-            {
-                HttpWebRequest request = Create(url);
-
-                using (WebResponse response = request.GetResponse())
-                {
-                    using (Stream responseStream = response.GetResponseStream())
-                        return responseStream.GetStreamString();
-                }
-            }
-            catch (Exception ex)
-            {
-                m_log.Warn("GET from untrusted URL " + url + " failed: " + ex.Message);
-                return null;
-            }
-        }
-
-        /// <summary>
-        /// Determines whether a URI is allowed based on scheme and host name.
-        /// No requireSSL check is done here
-        /// </summary>
-        /// <param name="allowLoopback">True to allow loopback addresses to be used</param>
-        /// <param name="uri">The URI to test for whether it should be allowed.</param>
-        /// <returns>
-        ///     <c>true</c> if [is URI allowable] [the specified URI]; otherwise, <c>false</c>.
-        /// </returns>
-        private static bool IsUriAllowable(Uri uri, bool allowLoopback)
-        {
-            if (!allowableSchemes.Contains(uri.Scheme))
-            {
-                m_log.WarnFormat("Rejecting URL {0} because it uses a disallowed scheme.", uri);
-                return false;
-            }
-
-            // Try to interpret the hostname as an IP address so we can test for internal
-            // IP address ranges.  Note that IP addresses can appear in many forms 
-            // (e.g. http://127.0.0.1, http://2130706433, http://0x0100007f, http://::1
-            // So we convert them to a canonical IPAddress instance, and test for all
-            // non-routable IP ranges: 10.*.*.*, 127.*.*.*, ::1
-            // Note that Uri.IsLoopback is very unreliable, not catching many of these variants.
-            IPAddress hostIPAddress;
-            if (IPAddress.TryParse(uri.DnsSafeHost, out hostIPAddress))
-            {
-                byte[] addressBytes = hostIPAddress.GetAddressBytes();
-
-                // The host is actually an IP address.
-                switch (hostIPAddress.AddressFamily)
-                {
-                    case System.Net.Sockets.AddressFamily.InterNetwork:
-                        if (!allowLoopback && (addressBytes[0] == 127 || addressBytes[0] == 10))
-                        {
-                            m_log.WarnFormat("Rejecting URL {0} because it is a loopback address.", uri);
-                            return false;
-                        }
-                        break;
-                    case System.Net.Sockets.AddressFamily.InterNetworkV6:
-                        if (!allowLoopback && IsIPv6Loopback(hostIPAddress))
-                        {
-                            m_log.WarnFormat("Rejecting URL {0} because it is a loopback address.", uri);
-                            return false;
-                        }
-                        break;
-                    default:
-                        m_log.WarnFormat("Rejecting URL {0} because it does not use an IPv4 or IPv6 address.", uri);
-                        return false;
-                }
-            }
-            else
-            {
-                // The host is given by name.  We require names to contain periods to
-                // help make sure it's not an internal address.
-                if (!allowLoopback && !uri.Host.Contains("."))
-                {
-                    m_log.WarnFormat("Rejecting URL {0} because it does not contain a period in the host name.", uri);
-                    return false;
-                }
-            }
-
-            return true;
-        }
-
-        /// <summary>
-        /// Determines whether an IP address is the IPv6 equivalent of "localhost/127.0.0.1".
-        /// </summary>
-        /// <param name="ip">The ip address to check.</param>
-        /// <returns>
-        ///     <c>true</c> if this is a loopback IP address; <c>false</c> otherwise.
-        /// </returns>
-        private static bool IsIPv6Loopback(IPAddress ip)
-        {
-            if (ip == null)
-                throw new ArgumentNullException("ip");
-
-            byte[] addressBytes = ip.GetAddressBytes();
-            for (int i = 0; i < addressBytes.Length - 1; i++)
-            {
-                if (addressBytes[i] != 0)
-                    return false;
-            }
-
-            if (addressBytes[addressBytes.Length - 1] != 1)
-                return false;
-
-            return true;
-        }
-    }
-}