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Redesign the IAuthenticationService interface to use PKI. Sessioning is 

now in the domain of the presence module where it belongs.
remotes/origin/0.6.7-post-fixes
Melanie 2009-08-29 17:37:41 +01:00
parent 1a6b30e092
commit dce04df4f2
2 changed files with 70 additions and 350 deletions
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312
OpenSim/Services/AuthenticationService/AuthenticationService.cs
View File

@ -1,312 +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.Reflection;
using Nini.Config;
using log4net;
using OpenSim.Framework;
using OpenSim.Data;
using OpenSim.Services.Base;
using OpenSim.Services.Interfaces;
using OpenMetaverse;
namespace OpenSim.Services.AuthenticationService
{
/// <summary>
/// Simple authentication service implementation dealing only with users.
/// It uses the user DB directly to access user information.
/// It takes two config vars:
/// - Authenticate = {true|false} : to do or not to do authentication
/// - Authority = string like "osgrid.org" : this identity authority
/// that will be called back for identity verification
/// </summary>
public class HGAuthenticationService : ServiceBase, IAuthenticationService
{
private static readonly ILog m_log
= LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
protected IUserDataPlugin m_Database;
protected string m_AuthorityURL;
protected bool m_PerformAuthentication;
protected Dictionary<UUID, List<string>> m_UserKeys = new Dictionary<UUID, List<string>>();
public HGAuthenticationService(IConfigSource config) : base(config)
{
string dllName = String.Empty;
string connString = String.Empty;
//
// Try reading the [DatabaseService] section first, if it exists
//
IConfig dbConfig = config.Configs["DatabaseService"];
if (dbConfig != null)
{
dllName = dbConfig.GetString("StorageProvider", String.Empty);
connString = dbConfig.GetString("ConnectionString", String.Empty);
}
//
// Try reading the more specific [InventoryService] section, if it exists
//
IConfig authConfig = config.Configs["AuthenticationService"];
if (authConfig != null)
{
dllName = authConfig.GetString("StorageProvider", dllName);
connString = authConfig.GetString("ConnectionString", connString);
m_PerformAuthentication = authConfig.GetBoolean("Authenticate", true);
m_AuthorityURL = "http://" + authConfig.GetString("Authority", "localhost");
if (!m_AuthorityURL.EndsWith("/"))
m_AuthorityURL += "/";
}
//
// We tried, but this doesn't exist. We can't proceed.
//
if (dllName.Equals(String.Empty))
throw new Exception("No InventoryService configuration");
m_Database = LoadPlugin<IUserDataPlugin>(dllName);
if (m_Database == null)
throw new Exception("Could not find a storage interface in the given module");
m_Database.Initialise(connString);
}
public UUID AuthenticateKey(UUID principalID, string key)
{
bool writeAgentData = false;
UserAgentData agent = m_Database.GetAgentByUUID(principalID);
if (agent == null)
{
agent = new UserAgentData();
agent.ProfileID = principalID;
agent.SessionID = UUID.Random();
agent.SecureSessionID = UUID.Random();
agent.AgentIP = "127.0.0.1";
agent.AgentPort = 0;
agent.AgentOnline = false;
writeAgentData = true;
}
if (!m_PerformAuthentication)
{
if (writeAgentData)
m_Database.AddNewUserAgent(agent);
return agent.SessionID;
}
if (!VerifyKey(principalID, key))
return UUID.Zero;
if (writeAgentData)
m_Database.AddNewUserAgent(agent);
return agent.SessionID;
}
/// <summary>
/// This implementation only authenticates users.
/// </summary>
/// <param name="principalID"></param>
/// <param name="password"></param>
/// <returns></returns>
public UUID AuthenticatePassword(UUID principalID, string password)
{
bool writeAgentData = false;
UserAgentData agent = m_Database.GetAgentByUUID(principalID);
if (agent == null)
{
agent = new UserAgentData();
agent.ProfileID = principalID;
agent.SessionID = UUID.Random();
agent.SecureSessionID = UUID.Random();
agent.AgentIP = "127.0.0.1";
agent.AgentPort = 0;
agent.AgentOnline = false;
writeAgentData = true;
}
if (!m_PerformAuthentication)
{
if (writeAgentData)
m_Database.AddNewUserAgent(agent);
return agent.SessionID;
}
UserProfileData profile = m_Database.GetUserByUUID(principalID);
bool passwordSuccess = false;
m_log.InfoFormat("[AUTH]: Authenticating {0} {1} ({2})", profile.FirstName, profile.SurName, profile.ID);
// we do this to get our hash in a form that the server password code can consume
// when the web-login-form submits the password in the clear (supposed to be over SSL!)
if (!password.StartsWith("$1$"))
password = "$1$" + Util.Md5Hash(password);
password = password.Remove(0, 3); //remove $1$
string s = Util.Md5Hash(password + ":" + profile.PasswordSalt);
// Testing...
//m_log.Info("[LOGIN]: SubHash:" + s + " userprofile:" + profile.passwordHash);
//m_log.Info("[LOGIN]: userprofile:" + profile.passwordHash + " SubCT:" + password);
passwordSuccess = (profile.PasswordHash.Equals(s.ToString(), StringComparison.InvariantCultureIgnoreCase)
|| profile.PasswordHash.Equals(password, StringComparison.InvariantCulture));
if (!passwordSuccess)
return UUID.Zero;
if (writeAgentData)
m_Database.AddNewUserAgent(agent);
return agent.SessionID;
}
/// <summary>
/// This generates authorization keys in the form
/// http://authority/uuid
/// after verifying that the caller is, indeed, authorized to request a key
/// </summary>
/// <param name="userID">The principal ID requesting the new key</param>
/// <param name="authToken">The original authorization token for that principal, obtained during login</param>
/// <returns></returns>
public string GetKey(UUID principalID, string authToken)
{
UserProfileData profile = m_Database.GetUserByUUID(principalID);
string newKey = string.Empty;
if (profile != null)
{
m_log.DebugFormat("[AUTH]: stored auth token is {0}. Given token is {1}", profile.WebLoginKey.ToString(), authToken);
// I'm overloading webloginkey for this, so that no changes are needed in the DB
// The uses of webloginkey are fairly mutually exclusive
if (profile.WebLoginKey.ToString().Equals(authToken))
{
newKey = UUID.Random().ToString();
List<string> keys;
lock (m_UserKeys)
{
if (m_UserKeys.ContainsKey(principalID))
{
keys = m_UserKeys[principalID];
}
else
{
keys = new List<string>();
m_UserKeys.Add(principalID, keys);
}
keys.Add(newKey);
}
m_log.InfoFormat("[AUTH]: Successfully generated new auth key for {0}", principalID);
}
else
m_log.Warn("[AUTH]: Unauthorized key generation request. Denying new key.");
}
else
m_log.Warn("[AUTH]: Principal not found.");
return m_AuthorityURL + newKey;
}
/// <summary>
/// This verifies the uuid portion of the key given out by GenerateKey
/// </summary>
/// <param name="userID"></param>
/// <param name="key"></param>
/// <returns></returns>
public bool VerifyKey(UUID userID, string key)
{
lock (m_UserKeys)
{
if (m_UserKeys.ContainsKey(userID))
{
List<string> keys = m_UserKeys[userID];
if (keys.Contains(key))
{
// Keys are one-time only, so remove it
keys.Remove(key);
return true;
}
return false;
}
else
return false;
}
}
public UUID CreateUserSession(UUID userID, UUID oldSessionID)
{
UserAgentData agent = m_Database.GetAgentByUUID(userID);
if (agent == null)
return UUID.Zero;
agent.SessionID = UUID.Random();
m_Database.AddNewUserAgent(agent);
return agent.SessionID;
}
public bool VerifyUserSession(UUID userID, UUID sessionID)
{
UserProfileData userProfile = m_Database.GetUserByUUID(userID);
if (userProfile != null && userProfile.CurrentAgent != null)
{
m_log.DebugFormat("[AUTH]: Verifying session {0} for {1}; current session {2}", sessionID, userID, userProfile.CurrentAgent.SessionID);
if (userProfile.CurrentAgent.SessionID == sessionID)
{
return true;
}
}
return false;
}
public bool DestroyUserSession(UUID userID, UUID sessionID)
{
if (!VerifyUserSession(userID, sessionID))
return false;
UserAgentData agent = m_Database.GetAgentByUUID(userID);
if (agent == null)
return false;
agent.SessionID = UUID.Zero;
m_Database.AddNewUserAgent(agent);
return true;
}
}
}

108
OpenSim/Services/Interfaces/IAuthenticationService.cs
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@ -38,57 +38,89 @@ namespace OpenSim.Services.Interfaces
//
public interface IAuthenticationService
{
//////////////////////////////////////////////////
// Web login key portion
//////////////////////////////////////////////////////
// PKI Zone!
//
// HG2 authentication works by using a cryptographic
// exchange.
// This method must provide a public key, the other
// crypto methods must understand hoow to deal with
// messages encrypted to it.
//
// If the public key is of zero length, you will
// get NO encryption and NO security.
//
// For non-HG installations, this is not relevant
//
// Implementors who are not using PKI can treat the
// cyphertext as a string and provide a zero-length
// key. Encryptionless implementations will not
// interoperate with implementations using encryption.
// If one side uses encryption, both must do so.
//
byte[] GetPublicKey();
// Get a service key given that principal's
// authentication token (master key).
//////////////////////////////////////////////////////
// Authentication
//
string GetKey(UUID principalID, string authToken);
// These methods will return a token, which can be used to access
// various services.
//
// The encrypted versions take the received cyphertext and
// the public key of the peer, which the connector must have
// obtained using a remote GetPublicKey call.
//
string AuthenticatePassword(UUID principalID, string password);
byte[] AuthenticatePasswordEncrypted(byte[] cyphertext, byte[] key);
// Verify that a principal key is valid
//
bool VerifyKey(UUID principalID, string key);
string AuthenticateWebkey(UUID principalID, string webkey);
byte[] AuthenticateWebkeyEncrypted(byte[] cyphertext, byte[] key);
//////////////////////////////////////////////////
// Password auth portion
//////////////////////////////////////////////////////
// Verification
//
// Allows to verify the authenticity of a token
//
// Tokens expire after 30 minutes and can be refreshed by
// re-verifying.
//
// If encrypted authentication was used, encrypted verification
// must be used to refresh. Unencrypted verification is still
// performed, but doesn't refresh token lifetime.
//
bool Verify(UUID principalID, string token);
bool VerifyEncrypted(byte[] cyphertext, byte[] key);
// Here's how thos works, and why.
//////////////////////////////////////////////////////
// Teardown
//
// The authentication methods will return the existing session,
// or UUID.Zero if authentication failed. If there is no session,
// they will create one.
// The CreateUserSession method will unconditionally create a session
// and invalidate the prior session.
// Grid login uses this method to make sure that the session is
// fresh and new. Other software, like management applications,
// can obtain this existing session if they have a key or password
// for that account, this allows external apps to obtain credentials
// and use authenticating interface methods.
// A token can be returned before the timeout. This
// invalidates it and it can not subsequently be used
// or refreshed.
//
// Check the pricipal's password
// Tokens created by encrypted authentication must
// be returned by encrypted release calls;
//
UUID AuthenticatePassword(UUID principalID, string password);
bool Release(UUID principalID, string token);
bool ReleaseEncrypted(byte[] cyphertext, byte[] key);
// Check the principal's key
//////////////////////////////////////////////////////
// Grid
//
UUID AuthenticateKey(UUID principalID, string password);
// We no longer need a shared secret between grid
// servers. Anything a server requests from another
// server is either done on behalf of a user, in which
// case there is a token, or on behalf of a region,
// which has a session. So, no more keys.
// If sniffing on the local lan is an issue, admins
// need to take approriate action (IPSec is recommended)
// to secure inter-server traffic.
// Create a new session, invalidating the old ones
//////////////////////////////////////////////////////
// NOTE
//
UUID CreateUserSession(UUID principalID, UUID oldSessionID);
// Verify that a user session ID is valid. A session ID is
// considered valid when a user has successfully authenticated
// at least one time inside that session.
//
bool VerifyUserSession(UUID principalID, UUID sessionID);
// Deauthenticate user
//
bool DestroyUserSession(UUID principalID, UUID sessionID);
// Session IDs are not handled here. After obtaining
// a token, the session ID regions use can be
// obtained from the presence service.
}
}