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BUG#: 3280
TITLE: Certificate based authentication should perform additional authentication checks

DESCRIPTION: Added a validateUser interface to the AuthenticationManager and Authenticator interfaces. Updated the Authentication handlers to implement the validateUser interface. Updated the PAM StandAlone Process to also support this interface. Updated the HTTPAuthenticatorDelegator to invoke the validateUser interface before setting the user name in the Identity Container during Certificate based authentication.

//%2005////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
// Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
// Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation, The Open Group.
// Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
// IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
// Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; VERITAS Software Corporation; The Open Group.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// THE ABOVE COPYRIGHT NOTICE AND THIS PERMISSION NOTICE SHALL BE INCLUDED IN
// ALL COPIES OR SUBSTANTIAL PORTIONS OF THE SOFTWARE. THE SOFTWARE IS PROVIDED
// "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//==============================================================================
//
// Author: Nag Boranna, Hewlett-Packard Company(nagaraja_boranna@hp.com)
//
// Modified By:
//
//%/////////////////////////////////////////////////////////////////////////////


#include <Pegasus/Common/FileSystem.h>
#include <Pegasus/Common/Tracer.h>

#include "LocalAuthFile.h"
#include "SecureLocalAuthenticator.h"

PEGASUS_USING_STD;

PEGASUS_NAMESPACE_BEGIN


/**
    Constant representing the pegasus authentication challenge header.
*/
static const String PEGASUS_CHALLENGE_HEADER = "WWW-Authenticate: ";


/* constructor. */
SecureLocalAuthenticator::SecureLocalAuthenticator() 
{ 
    PEG_METHOD_ENTER(TRC_AUTHENTICATION,
        "SecureLocalAuthenticator::SecureLocalAuthenticator()");

    PEG_METHOD_EXIT();

}

/* destructor. */
SecureLocalAuthenticator::~SecureLocalAuthenticator() 
{ 
    PEG_METHOD_ENTER(TRC_AUTHENTICATION,
        "SecureLocalAuthenticator::~SecureLocalAuthenticator()");

    PEG_METHOD_EXIT();

}

//
// Does local authentication
//
Boolean SecureLocalAuthenticator::authenticate
(
   const String& filePath, 
   const String& secretReceived, 
   const String& secretKept
)
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION,
        "SecureLocalAuthenticator::authenticate()");

    Boolean authenticated = false;


    if ((!String::equal(secretReceived, String::EMPTY)) &&
        (!String::equal(secretKept, String::EMPTY)))
    {
        if (String::equal(secretKept, secretReceived))
        {
            authenticated = true;
        }
    }

    //
    // remove the auth file created for this user request
    //
    if (filePath.size())
    {
        if (FileSystem::exists(filePath))
        {
            FileSystem::removeFile(filePath);
        }
    }

    PEG_METHOD_EXIT();

    return (authenticated);
}


Boolean SecureLocalAuthenticator::validateUser (const String& userName)
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION,
        "SecureLocalAuthenticator::validateUser()");

    Boolean authenticated = false;

    if (System::isSystemUser(userName.getCString()))
    {
        authenticated = true;
    }

    PEG_METHOD_EXIT();
    return (authenticated);
}

//
// Create authentication response header
//
String SecureLocalAuthenticator::getAuthResponseHeader(
    const String& authType, 
    const String& userName, 
    String& challenge)
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION,
        "SecureLocalAuthenticator::getAuthResponseHeader()");

    String responseHeader = PEGASUS_CHALLENGE_HEADER;
    responseHeader.append(authType);
    responseHeader.append(" \"");

    //
    // create a file using user name and write a random number in it.
    //
    LocalAuthFile localAuthFile(userName);
    String filePath  = localAuthFile.create();

    //
    // get the challenge string
    //
    String temp = localAuthFile.getChallengeString();
    challenge = temp;

    // 
    // build response header with file path and challenge string.
    //
    responseHeader.append(filePath);
    responseHeader.append("\"");

    PEG_METHOD_EXIT();

    return (responseHeader);
}


PEGASUS_NAMESPACE_END