From 5c7ffdde0b9642a42e8f5987e06eb01220ff7776 Mon Sep 17 00:00:00 2001
From: Adam Frisby
Date: Wed, 11 Jul 2007 08:02:47 +0000
Subject: * Wiping trunk in prep for Sugilite
---
Common/OpenSim.Framework/Remoting.cs | 137 -----------------------------------
1 file changed, 137 deletions(-)
delete mode 100644 Common/OpenSim.Framework/Remoting.cs
(limited to 'Common/OpenSim.Framework/Remoting.cs')
diff --git a/Common/OpenSim.Framework/Remoting.cs b/Common/OpenSim.Framework/Remoting.cs
deleted file mode 100644
index 660cdde..0000000
--- a/Common/OpenSim.Framework/Remoting.cs
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
-* Copyright (c) Contributors, http://www.openmetaverse.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 OpenSim 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.Text;
-using System.Security.Cryptography;
-
-namespace OpenSim.Framework
-{
- ///
- /// NEEDS AUDIT.
- ///
- ///
- /// Suggested implementation
- /// Store two digests for each foreign host. A local copy of the local hash using the local challenge (when issued), and a local copy of the remote hash using the remote challenge.
- /// When sending data to the foreign host - run 'Sign' on the data and affix the returned byte[] to the message.
- /// When recieving data from the foreign host - run 'Authenticate' against the data and the attached byte[].
- /// Both hosts should be performing these operations for this to be effective.
- ///
- class RemoteDigest
- {
- private byte[] currentHash;
- private byte[] secret;
-
- private SHA512Managed SHA512;
-
- ///
- /// Initialises a new RemoteDigest authentication mechanism
- ///
- /// Needs an audit by a cryptographic professional - was not "roll your own"'d by choice but rather a serious lack of decent authentication mechanisms in .NET remoting
- /// The shared secret between systems (for inter-sim, this is provided in encrypted form during connection, for grid this is input manually in setup)
- /// Binary salt - some common value - to be decided what
- /// The challenge key provided by the third party
- public RemoteDigest(string sharedSecret, byte[] salt, string challenge)
- {
- SHA512 = new SHA512Managed();
- Rfc2898DeriveBytes RFC2898 = new Rfc2898DeriveBytes(sharedSecret,salt);
- secret = RFC2898.GetBytes(512);
- ASCIIEncoding ASCII = new ASCIIEncoding();
-
- currentHash = SHA512.ComputeHash(AppendArrays(secret, ASCII.GetBytes(challenge)));
- }
-
- ///
- /// Authenticates a piece of incoming data against the local digest. Upon successful authentication, digest string is incremented.
- ///
- /// The incoming data
- /// The remote digest
- ///
- public bool Authenticate(byte[] data, byte[] digest)
- {
- byte[] newHash = SHA512.ComputeHash(AppendArrays(AppendArrays(currentHash, secret), data));
- if (digest == newHash)
- {
- currentHash = newHash;
- return true;
- }
- else
- {
- throw new Exception("Hash comparison failed. Key resync required.");
- }
- }
-
- ///
- /// Signs a new bit of data with the current hash. Returns a byte array which should be affixed to the message.
- /// Signing a piece of data will automatically increment the hash - if you sign data and do not send it, the
- /// hashes will get out of sync and throw an exception when validation is attempted.
- ///
- /// The outgoing data
- /// The local digest
- public byte[] Sign(byte[] data)
- {
- currentHash = SHA512.ComputeHash(AppendArrays(AppendArrays(currentHash, secret), data));
- return currentHash;
- }
-
- ///
- /// Generates a new challenge string to be issued to a foreign host. Challenges are 1024-bit (effective strength of less than 512-bits) messages generated using the Crytographic Random Number Generator.
- ///
- /// A 128-character hexadecimal string containing the challenge.
- public static string GenerateChallenge()
- {
- RNGCryptoServiceProvider RNG = new RNGCryptoServiceProvider();
- byte[] bytes = new byte[64];
- RNG.GetBytes(bytes);
-
- StringBuilder sb = new StringBuilder(bytes.Length * 2);
- foreach (byte b in bytes)
- {
- sb.AppendFormat("{0:x2}", b);
- }
- return sb.ToString();
- }
-
- ///
- /// Helper function, merges two byte arrays
- ///
- /// Sourced from MSDN Forum
- /// A
- /// B
- /// C
- private byte[] AppendArrays(byte[] a, byte[] b)
- {
- byte[] c = new byte[a.Length + b.Length];
- Buffer.BlockCopy(a, 0, c, 0, a.Length);
- Buffer.BlockCopy(b, 0, c, a.Length, b.Length);
- return c;
- }
-
- }
-}
--
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