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/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/


#include "system.h"

#include <osl/security.h>
#include <osl/diagnose.h>
#include <osl/module.h>

#include "osl/thread.h"
#include "osl/file.h"

#ifdef SOLARIS
#include <crypt.h>
#endif

#include "secimpl.h"

#ifndef PAM_BINARY_MSG
#define PAM_BINARY_MSG 6
#endif

extern oslModule SAL_CALL osl_psz_loadModule(const sal_Char *pszModuleName, sal_Int32 nRtldMode);
extern void* SAL_CALL osl_psz_getSymbol(oslModule hModule, const sal_Char* pszSymbolName);
extern oslSecurityError SAL_CALL
osl_psz_loginUser(const sal_Char* pszUserName, const sal_Char* pszPasswd,
                  oslSecurity* pSecurity);
sal_Bool SAL_CALL osl_psz_getUserIdent(oslSecurity Security, sal_Char *pszIdent, sal_uInt32 nMax);
sal_Bool SAL_CALL osl_psz_getUserName(oslSecurity Security, sal_Char* pszName, sal_uInt32  nMax);
sal_Bool SAL_CALL osl_psz_getHomeDir(oslSecurity Security, sal_Char* pszDirectory, sal_uInt32 nMax);
sal_Bool SAL_CALL osl_psz_getConfigDir(oslSecurity Security, sal_Char* pszDirectory, sal_uInt32 nMax);



oslSecurity SAL_CALL osl_getCurrentSecurity()
{

    oslSecurityImpl *pSecImpl = (oslSecurityImpl*) malloc(sizeof(oslSecurityImpl));
    struct passwd   *pPasswd  = getpwuid(getuid());

    if (pPasswd)
    {
        memcpy(&pSecImpl->m_pPasswd, pPasswd, sizeof(pSecImpl->m_pPasswd));
        pSecImpl->m_isValid = sal_True;
    }
    else
    {
        /* Some UNIX-OS don't implement getpwuid, e.g. NC OS (special NetBSD) 1.2.1 */
        /* so we have to catch this in this else branch */
        pSecImpl->m_pPasswd.pw_name     = getenv("USER");
        pSecImpl->m_pPasswd.pw_dir      = getenv("HOME");
        if (pSecImpl->m_pPasswd.pw_name && pSecImpl->m_pPasswd.pw_dir)
            pSecImpl->m_isValid             = sal_True;
        else
        {
            pSecImpl->m_pPasswd.pw_name     = "unknown";
            pSecImpl->m_pPasswd.pw_dir      = "/tmp";
            pSecImpl->m_isValid             = sal_False;
        }
        pSecImpl->m_pPasswd.pw_passwd   = NULL;
        pSecImpl->m_pPasswd.pw_uid      = getuid();
        pSecImpl->m_pPasswd.pw_gid      = getgid();
        pSecImpl->m_pPasswd.pw_gecos    = "unknown";
        pSecImpl->m_pPasswd.pw_shell    = "unknown";
    }


    return ((oslSecurity)pSecImpl);
}


oslSecurityError SAL_CALL osl_loginUser(
    rtl_uString *ustrUserName,
    rtl_uString *ustrPassword,
    oslSecurity *pSecurity
    )
{
    oslSecurityError ret;

    *pSecurity = osl_getCurrentSecurity();
    ret = osl_Security_E_None;

    return ret;
}



oslSecurityError SAL_CALL osl_loginUserOnFileServer(
    rtl_uString *strUserName,
    rtl_uString *strPasswd,
    rtl_uString *strFileServer,
    oslSecurity *pSecurity
    )
{
    oslSecurityError erg;
    return erg = osl_Security_E_UserUnknown;
}


oslSecurityError SAL_CALL osl_psz_loginUserOnFileServer( const sal_Char*  pszUserName,
                                                     const sal_Char*  pszPasswd,
                                                     const sal_Char*  pszFileServer,
                                                     oslSecurity*     pSecurity )
{
    oslSecurityError erg;
    return erg = osl_Security_E_UserUnknown;
}

sal_Bool SAL_CALL osl_getUserIdent(oslSecurity Security, rtl_uString **ustrIdent)
{
    sal_Bool bRet=sal_False;
    sal_Char pszIdent[1024];

    pszIdent[0] = '\0';

    bRet = osl_psz_getUserIdent(Security,pszIdent,sizeof(pszIdent));

    rtl_string2UString( ustrIdent, pszIdent, rtl_str_getLength( pszIdent ), osl_getThreadTextEncoding(), OUSTRING_TO_OSTRING_CVTFLAGS );
    OSL_ASSERT(*ustrIdent != NULL);

    return bRet;
}


sal_Bool SAL_CALL osl_psz_getUserIdent(oslSecurity Security, sal_Char *pszIdent, sal_uInt32 nMax)
{
    sal_Char  buffer[32];
    sal_Int32 nChr;

    oslSecurityImpl *pSecImpl = (oslSecurityImpl *)Security;

    if (pSecImpl == NULL)
        return sal_False;

    nChr = snprintf(buffer, sizeof(buffer), "%u", pSecImpl->m_pPasswd.pw_uid);
    if ( nChr < 0 || nChr >= sizeof(buffer) || nChr >= nMax )
        return sal_False; /* leave *pszIdent unmodified in case of failure */

    memcpy(pszIdent, buffer, nChr+1);
    return sal_True;
}

sal_Bool SAL_CALL osl_getUserName(oslSecurity Security, rtl_uString **ustrName)
{
    sal_Bool bRet=sal_False;
    sal_Char pszName[1024];

    pszName[0] = '\0';

    bRet = osl_psz_getUserName(Security,pszName,sizeof(pszName));

    rtl_string2UString( ustrName, pszName, rtl_str_getLength( pszName ), osl_getThreadTextEncoding(), OUSTRING_TO_OSTRING_CVTFLAGS );
    OSL_ASSERT(*ustrName != NULL);

    return bRet;
}



sal_Bool SAL_CALL osl_psz_getUserName(oslSecurity Security, sal_Char* pszName, sal_uInt32  nMax)
{
    oslSecurityImpl *pSecImpl = (oslSecurityImpl *)Security;

    if ((pSecImpl == NULL) || (! pSecImpl->m_isValid))
        return sal_False;

    strncpy(pszName, pSecImpl->m_pPasswd.pw_name, nMax);

    return sal_True;
}

sal_Bool SAL_CALL osl_getHomeDir(oslSecurity Security, rtl_uString **pustrDirectory)
{
    sal_Bool bRet=sal_False;
    sal_Char pszDirectory[PATH_MAX];

    pszDirectory[0] = '\0';

    bRet = osl_psz_getHomeDir(Security,pszDirectory,sizeof(pszDirectory));

    if ( bRet == sal_True )
    {
        rtl_string2UString( pustrDirectory, pszDirectory, rtl_str_getLength( pszDirectory ), osl_getThreadTextEncoding(), OUSTRING_TO_OSTRING_CVTFLAGS );
        OSL_ASSERT(*pustrDirectory != NULL);
        osl_getFileURLFromSystemPath( *pustrDirectory, pustrDirectory );
    }

    return bRet;
}


sal_Bool SAL_CALL osl_psz_getHomeDir(oslSecurity Security, sal_Char* pszDirectory, sal_uInt32 nMax)
{
    oslSecurityImpl *pSecImpl = (oslSecurityImpl *)Security;

    if (pSecImpl == NULL)
        return sal_False;

    /* if current user, check also environment for HOME */
    if (getuid() == pSecImpl->m_pPasswd.pw_uid)
    {
        sal_Char *pStr = NULL;
#ifdef SOLARIS
        char    buffer[8192];

        struct passwd pwd;
        struct passwd *ppwd;

#ifdef _POSIX_PTHREAD_SEMANTICS
        if ( 0 != getpwuid_r(getuid(), &pwd, buffer, sizeof(buffer), &ppwd ) )
            ppwd = NULL;
#else
        ppwd = getpwuid_r(getuid(), &pwd, buffer, sizeof(buffer) );
#endif

        if ( ppwd )
            pStr = ppwd->pw_dir;
#else
        pStr = getenv("HOME");
#endif

        if ((pStr != NULL) && (strlen(pStr) > 0) &&
            (access(pStr, 0) == 0))
            strncpy(pszDirectory, pStr, nMax);
        else
            if (pSecImpl->m_isValid)
                strncpy(pszDirectory, pSecImpl->m_pPasswd.pw_dir, nMax);
            else
                return sal_False;
    }
    else
        strncpy(pszDirectory, pSecImpl->m_pPasswd.pw_dir, nMax);

    return sal_True;
}

sal_Bool SAL_CALL osl_getConfigDir(oslSecurity Security, rtl_uString **pustrDirectory)
{
    sal_Bool bRet = sal_False;
    sal_Char pszDirectory[PATH_MAX];

    pszDirectory[0] = '\0';

    bRet = osl_psz_getConfigDir(Security,pszDirectory,sizeof(pszDirectory));

    if ( bRet == sal_True )
    {
        rtl_string2UString( pustrDirectory, pszDirectory, rtl_str_getLength( pszDirectory ), osl_getThreadTextEncoding(), OUSTRING_TO_OSTRING_CVTFLAGS );
        OSL_ASSERT(*pustrDirectory != NULL);
        osl_getFileURLFromSystemPath( *pustrDirectory, pustrDirectory );
    }

    return bRet;
}


sal_Bool SAL_CALL osl_psz_getConfigDir(oslSecurity Security, sal_Char* pszDirectory, sal_uInt32 nMax)
{
    return (osl_psz_getHomeDir(Security, pszDirectory, nMax));
}

sal_Bool SAL_CALL osl_isAdministrator(oslSecurity Security)
{
    oslSecurityImpl *pSecImpl = (oslSecurityImpl *)Security;

    if (pSecImpl == NULL)
        return sal_False;

    if (pSecImpl->m_pPasswd.pw_uid != 0)
        return (sal_False);

    return (sal_True);
}

void SAL_CALL osl_freeSecurityHandle(oslSecurity Security)
{
    if (Security)
        free ((oslSecurityImpl*)Security);
}


sal_Bool SAL_CALL osl_loadUserProfile(oslSecurity Security)
{
    return sal_False;
}

void SAL_CALL osl_unloadUserProfile(oslSecurity Security)
{
    return;
}