//%2006////////////////////////////////////////////////////////////////////////
//
// 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.
// Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
// EMC Corporation; Symantec 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.
//
//==============================================================================
//
//%/////////////////////////////////////////////////////////////////////////////

#include <Pegasus/Common/AuditLogger.h>
#include <Pegasus/Common/Logger.h>
#include <Pegasus/Common/Tracer.h>

#include "SecureLocalAuthenticator.h"
#include "LocalAuthenticationHandler.h"

#ifdef PEGASUS_ZOS_SECURITY
// This include file will not be provided in the OpenGroup CVS for now.
// Do NOT try to include it in your compile
#include <Pegasus/Common/safCheckzOS_inline.h>
#endif

PEGASUS_USING_STD;

PEGASUS_NAMESPACE_BEGIN


LocalAuthenticationHandler::LocalAuthenticationHandler()
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION, 
       "LocalAuthenticationHandler::LocalAuthenticationHandler()");

    _localAuthenticator.reset((LocalAuthenticator*) new SecureLocalAuthenticator());

    PEG_METHOD_EXIT();
}

LocalAuthenticationHandler::~LocalAuthenticationHandler()
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION, 
        "LocalAuthenticationHandler::~LocalAuthenticationHandler()");

    PEG_METHOD_EXIT();
}

Boolean LocalAuthenticationHandler::authenticate(    
    const String& authHeader,
    AuthenticationInfo* authInfo)
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION, 
        "LocalAuthenticationHandler::authenticate()");

    // Look for ':' seperator
    Uint32 colon1 = authHeader.find(':');

    if ( colon1 == PEG_NOT_FOUND )
    {
        PEG_METHOD_EXIT();
        return false;
    }

    String userName = authHeader.subString(0, colon1);

    // Look for another ':' seperator
    Uint32 colon2 = authHeader.find(colon1 + 1, ':');

    String filePath;

    String secretReceived;

    if ( colon2 == PEG_NOT_FOUND )
    {
        filePath = String::EMPTY;

        secretReceived = authHeader.subString( colon1 + 1 );    
    }
    else
    {
        filePath = authHeader.subString( colon1 + 1, (colon2 - colon1 - 1) );

        secretReceived = authHeader.subString( colon2 + 1 );    
    }

    //
    // Check for the expected file path in the authentication header
    //
    if (filePath != authInfo->getLocalAuthFilePath())
    {
        PEG_METHOD_EXIT();
        return false;
    }

    //
    // Check if the authentication information is present
    //
    if (secretReceived.size() == 0 || userName.size() == 0)
    {
        PEG_METHOD_EXIT();
        return false;
    }

    String authenticatedUsername = authInfo->getAuthenticatedUser();

    // 
    // If this connection has been previously authenticated then ensure 
    // the username passed with the current request matches the 
    // username previously authenticated.
    //
    if (authenticatedUsername.size() != 0 &&
        userName != authenticatedUsername)
    {
        PEG_METHOD_EXIT();
        return false;
    }

    //
    // Check if the user is a valid system user
    //
    if ( !System::isSystemUser( userName.getCString() ) )
    {
        PEG_METHOD_EXIT();
        return false;
    }

    // Check if the user is authorized to CIMSERV
#ifdef PEGASUS_ZOS_SECURITY
    if ( !CheckProfileCIMSERVclassWBEM(userName, __READ_RESOURCE) )
    {
        Logger::put_l(Logger::TRACE_LOG, ZOS_SECURITY_NAME, Logger::WARNING,
            "Security.Authentication.LocalAuthenticationHandler"
            ".NOREAD_CIMSERV_ACCESS.PEGASUS_OS_ZOS",
            "Request UserID $0 doesn't have READ permission to profile CIMSERV CL(WBEM).",
            userName);
        return false;
    }
#endif

    // It is not necessary to check remote privileged user access for local
    // connections; set the flag to "check done"
    authInfo->setRemotePrivilegedUserAccessChecked();

    // Authenticate
    Boolean authenticated = _localAuthenticator->authenticate(
        filePath, secretReceived, authInfo->getLocalAuthSecret());

    if (authenticated)
    {
        authInfo->setAuthenticatedUser(userName);
        // For Privilege Separation, remember the secret on subsequent requests
        authInfo->setLocalAuthSecret(secretReceived);
    }

    PEG_AUDIT_LOG(logLocalAuthentication(
                     userName,
                     authenticated));

    PEG_METHOD_EXIT();

    return ( authenticated );
}

Boolean LocalAuthenticationHandler::validateUser(const String& userName)
{
    return _localAuthenticator->validateUser(userName);
}

String LocalAuthenticationHandler::getAuthResponseHeader(
    const String& authType,
    const String& userName,
    AuthenticationInfo* authInfo)
{
    PEG_METHOD_ENTER(TRC_AUTHENTICATION, 
        "LocalAuthenticationHandler::getAuthResponseHeader()");

    String secret;
    String filePath;
    String authResp;

    //
    // Check if the user is a valid system user
    //
    if ( !System::isSystemUser( userName.getCString() ) )
    {
        PEG_METHOD_EXIT();
        return ( authResp );
    }

    authResp = _localAuthenticator->getAuthResponseHeader(
        authType, userName, filePath, secret);

    authInfo->setLocalAuthFilePath(filePath);
    authInfo->setLocalAuthSecret(secret);

    PEG_METHOD_EXIT();

    return ( authResp );
}

PEGASUS_NAMESPACE_END