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791 lines
26 KiB
C
791 lines
26 KiB
C
/* ====================================================================
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*
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* Apache FrontPage module.
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*
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* Copyright (c) 1996-1997 Microsoft Corporation -- All Rights Reserved.
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*
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* NO WARRANTIES. Microsoft expressly disclaims any warranty for this code and
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* information. This code and information and any related documentation is
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* provided "as is" without warranty of any kind, either express or implied,
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* including, without limitation, the implied warranties or merchantability,
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* fitness for a particular purpose, or noninfringement. The entire risk
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* arising out of use or performance of this code and information remains with
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* you.
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*
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* NO LIABILITY FOR DAMAGES. In no event shall Microsoft or its suppliers be
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* liable for any damages whatsoever (including, without limitation, damages
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* for loss of business profits, business interruption, loss of business
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* information, or any other pecuniary loss) arising out of the use of or
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* inability to use this Microsoft product, even if Microsoft has been advised
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* of the possibility of such damages. Because some states/jurisdictions do not
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* allow the exclusion or limitation of liability for consequential or
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* incidental damages, the above limitation may not apply to you.
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*
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* $Revision: 5 $
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* $Date: 6/19/98 5:25p $
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*
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*/
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/*
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* User configurable items. We will not run the server extensions with any
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* UID/GID less than LOWEST_VALID_UID/LOWEST_VALID_GID.
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*/
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#if defined(LINUX)
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#define LOWEST_VALID_UID 15
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#else
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#define LOWEST_VALID_UID 11
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#endif
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#if defined(HPUX) || defined(IRIX) || defined(SUNOS4)
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#define LOWEST_VALID_GID 20
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#else
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#if defined(SCO)
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#define LOWEST_VALID_GID 24
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#else
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#define LOWEST_VALID_GID 21 /* Solaris, AIX, Alpha, Bsdi, *BSD, etc. */
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#endif
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#endif
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/*
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* End of user configurable items
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*/
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#include "httpd.h"
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#include "http_config.h"
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#include "http_conf_globals.h"
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#include "http_log.h"
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#include <stdio.h>
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#include <sys/time.h>
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#if defined(UWARE7) || UW==700
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#define Vstat stat32
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#define Vlstat lstat32
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#else
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#define Vstat stat
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#define Vlstat lstat
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef MAXPATHLEN
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#define MAXPATHLEN 1024
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#endif
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#if (MAXPATHLEN < 1024)
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#undef MAXPATHLEN
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#define MAXPATHLEN 1024
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#endif
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#define KEYLEN 128 /* Should be a multiple of sizeof(int) */
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static char gszKeyVal[KEYLEN+1]; /* SUID key value used by this module */
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static int gfdKeyPipe[2]; /* Pipe to fpexe stub CGI */
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static int gbKeyPipeActive = FALSE;/* Pipe to fpexe stub CGI is active */
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static int gbEnabled = FALSE; /* TRUE when SUID scheme is enabled */
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#if !defined(SHARED_MODULE)
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static int giInitializeCount =0 /* FrontPageInit called previously */
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#endif
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static const char* FP =
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"/usr/local/frontpage/version4.0";
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static const char* FPKEYDIR =
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"/usr/local/frontpage/version4.0/apache-fp";
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static const char* KEYFILEXOR =
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"/usr/local/frontpage/version4.0/apache-fp/suidkey";
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static const char* KEYFILE =
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"/usr/local/frontpage/version4.0/apache-fp/suidkey.%d";
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static const char* FPSTUBDIR =
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"/usr/local/frontpage/version4.0/apache-fp/_vti_bin";
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static const char* FPSTUB =
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"/usr/local/frontpage/version4.0/apache-fp/_vti_bin/fpexe";
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static const char* SHTML =
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"/_vti_bin/shtml.exe";
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static const char* SHTML2 =
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"/_vti_bin/shtml.dll";
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static const char* VTI_BIN =
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"/_vti_bin";
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static const char* FPCOUNT =
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"/_vti_bin/fpcount.exe";
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static const char* AUTHOR =
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"/_vti_bin/_vti_aut/author.exe" ;
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static const char* ADMIN =
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"/_vti_bin/_vti_adm/admin.exe" ;
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MODULE_VAR_EXPORT module frontpage_module;
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/*
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* Print a descriptive error in the httpd's error_log. The format string
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* should be length limited so that it is no longer than 1800 bytes.
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*/
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static void LogFrontPageError(
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server_rec* s,
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const char* szFormat,
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const char* szFile,
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const char* szRoutine,
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int bIsDisabled)
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{
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char szBuf[MAXPATHLEN * 2];
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sprintf(szBuf, szFormat, szFile);
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strcat(szBuf, " in ");
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strcat(szBuf, szRoutine);
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strcat(szBuf, ".");
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if (bIsDisabled)
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{
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strcat(szBuf, " Until this problem is fixed, the FrontPage security patch is disabled and the FrontPage extensions may not work correctly.");
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gbEnabled = FALSE; /* Make double sure we're not enabled */
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}
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ap_log_error(APLOG_MARK, APLOG_ERR, s, szBuf);
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}
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/*
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* Clean up stale keyfiles. Failure to clean up stale keyfiles does not
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* stop the FrontPage SUID scheme.
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*/
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static void FrontPageCleanup(server_rec *s)
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{
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DIR *d;
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struct DIR_TYPE *dstruct;
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int myPid = getpid();
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if (!(d = opendir(FPKEYDIR)))
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{
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/*
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* This should be a rare occurrence, because we're running as root and
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* should have access to the directory. Stale key files can be
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* exploited. User recovery: Check that the directory exists and is
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* properly protected (owned by root, permissions rwx--x--x), and that
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* there are no stale key files in it (suidkey.*, where * is a
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* non-existant PID).
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*/
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LogFrontPageError(s, "Can't clean stale key files from directory \"%-.1024s\"",
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FPKEYDIR, "FrontPageCleanup()", FALSE);
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return;
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}
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while ((dstruct = readdir(d)))
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{
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if (strncmp("suidkey.", dstruct->d_name, 8) == 0)
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{
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/*
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* Make sure the key file contains a pid number - otherwise
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* it is harmless and you can ignore it.
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*/
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char* pEnd = 0;
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int pid = strtol(dstruct->d_name + 8, &pEnd, 10);
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if (!pEnd || *pEnd)
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continue;
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/*
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* Make sure there isn't some other server using this key file.
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* If the process group isn't alive, then the file is stale
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* and we want to remove it.
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*/
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if (pid == myPid || kill(pid, 0) == -1)
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{
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char szBuf[MAXPATHLEN];
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sprintf(szBuf, "%-.500s/%-.500s", FPKEYDIR, dstruct->d_name);
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if (unlink(szBuf) == -1)
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{
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/*
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* This should be a rare occurrence, because we're running
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* as root and should always have permission to delete the
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* file. Stale key files can be exploited. User recovery:
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* delete the offending file.
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*/
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LogFrontPageError(s, "Can't unlink stale key file \"%-.1024s\"",
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szBuf, "FrontPageCleanup()", FALSE);
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}
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}
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}
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}
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closedir(d);
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}
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/*
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* Checks that all the permissions are currently correct for the FrontPage
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* fpexe SUID stub to run correctly. If not, it logs an error and aborts
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* initialization, effectively disabling the FrontPage SUID scheme.
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* It checks both the file permissions (owned by root and not writable to
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* group, other) and that the directory is not writable.
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*/
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static int FrontPageCheckup(server_rec *s)
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{
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struct stat fs;
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if (geteuid() != 0)
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{
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/*
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* We need to be root to have the security scheme work correctly.
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* User recovery: run the server as root.
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*/
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LogFrontPageError(s, "Not running as root",
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0, "FrontPageCheckup()", TRUE);
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return (FALSE);
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}
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if (Vlstat(FPKEYDIR, &fs) == -1 || /* We can't stat the key dir */
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fs.st_uid || /* key dir not owned by root */
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(fs.st_mode & (S_IRGRP | S_IROTH)) || /* key dir is readable */
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(fs.st_mode & (S_IWGRP | S_IWOTH)) || /* key dir is writable */
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!(fs.st_mode & (S_IXGRP | S_IXOTH)) || /* key dir is not executable */
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!(S_ISDIR(fs.st_mode)))
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{
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/*
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* User recovery: set directory to be owned by by root with permissions
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* rwx--x--x. Note you need the execute bit for group and other so
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* that non-root programs can run apache-fp/_vti_bin/fpexe (even though
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* non-root cannot list the directory).
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*/
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LogFrontPageError(s, "Incorrect permissions on key directory \"%-.1024s\", needs root ownership and permissions rwx--x--x",
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FPKEYDIR, "FrontPageCheckup()", TRUE);
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return (FALSE);
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}
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if (Vlstat(FPSTUBDIR, &fs) == -1 || /* We can't stat the stub dir */
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fs.st_uid || /* stub dir not owned by root */
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(fs.st_mode & (S_IWGRP | S_IWOTH)) || /* stub dir is writable */
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(!S_ISDIR(fs.st_mode)))
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{
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/*
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* User recovery: set directory to be owned by by root with permissions
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* r*x*-x*-x.
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*/
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LogFrontPageError(s, "Incorrect permissions on stub directory \"%-.1024s\", needs root ownership and permissions r*x*-x*-x",
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FPSTUBDIR, "FrontPageCheckup()", TRUE);
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return (FALSE);
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}
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if (Vstat(FPSTUB, &fs) == -1 || /* We can't stat the stub */
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fs.st_uid || /* stub not owned by root */
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!(fs.st_mode & S_ISUID) || /* stub is not set-uid */
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(fs.st_mode & S_ISGID) || /* stub is set-gid */
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(fs.st_mode & (S_IWGRP | S_IWOTH)) || /* stub is writable */
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!(fs.st_mode & (S_IXGRP | S_IXOTH))) /* stub is not executable */
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{
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/*
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* User recovery: set stub to be owned by by root with permissions
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* r*s*-x*-x.
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*/
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LogFrontPageError(s, "Incorrect permissions on stub \"%-.1024s\", needs root ownership and permissions r*s*-x*-x",
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FPSTUB, "FrontPageCheckup()", TRUE);
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return (FALSE);
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}
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return (TRUE);
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}
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/*
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* Module-initializer: Create the suidkey file and local value.
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* Everything needs to be just right, or we don't create the key file, and
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* therefore, the fpexe SUID stub refuses to run.
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*/
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static void FrontPageInit(server_rec *s, pool *p)
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{
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int fdPipe[2];
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pid_t pid;
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FILE *f;
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struct stat fs;
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int fd;
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char szKeyFile[MAXPATHLEN];
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int iRandom[5];
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char* szRandom = (char*)iRandom;
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struct timeval tp;
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struct timezone tz;
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(void)p; /* p is unused */
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#if !defined(SHARED_MODULE)
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/*
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* Standalone servers call initialization twice: once in main() and again
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* in standalone_main(). The fully initializing on the the first call is a
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* waste of time, and a race condition can leave a stale suidkey.pgrpid
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* file around.
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*/
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if (ap_standalone && !giInitializeCount++)
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return;
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#endif
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/*
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* Disable the suid scheme until everything falls perfectly into place.
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*/
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gbEnabled = FALSE;
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gbKeyPipeActive = FALSE;
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/*
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* Clean up old key files before we start
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*/
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FrontPageCleanup(s);
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if (!FrontPageCheckup(s))
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return;
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if (pipe(fdPipe) == -1)
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{
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/*
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* This should be a rare occurrence. User recovery: check to see why
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* the system cannot allocate a pipe (is the file table full from
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* run-away processes?), and fix the problem or reboot, then try again.
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*/
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LogFrontPageError(s, "pipe() failed", 0, "FrontPageInit()", TRUE);
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return;
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}
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gettimeofday(&tp, &tz);
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iRandom[0] = tp.tv_sec;
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iRandom[1] = tp.tv_usec | tp.tv_usec << 20;
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pid = fork();
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if (pid == -1)
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{
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/*
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* This should be a rare occurrence. User recovery: check to see why
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* the system cannot allocate a process (is the process table full from
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* run-away processes?), and fix the problem or reboot, then try again.
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*/
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LogFrontPageError(s, "fork() failed", 0, "FrontPageInit()", TRUE);
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return;
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}
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if (pid)
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{
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/*
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* I am the parent process. Try to read a random number from the
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* child process.
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*/
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unsigned int npos = (unsigned int)-1;
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unsigned int v1 = npos, v2 = npos, v3 = npos, v4 = npos;
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int stat;
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int iCount;
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close(fdPipe[1]);
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if (waitpid(pid, &stat, 0) == -1 ||
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(!WIFEXITED(stat) || WIFEXITED(stat) && WEXITSTATUS(stat)))
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{
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/*
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* This should be a rare occurrence. User recovery: Make sure you
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* have a /bin/sh, or change the shell location in the execl
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* command below. Try the commands defined in RAND_CMD in a
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* /bin/sh session to make sure they work properly. Rebuild this
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* module and your httpd with the proper commands.
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*/
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LogFrontPageError(s, "Random number generator exited abnormally", 0,
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"FrontPageInit()", TRUE);
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return;
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}
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iCount = read(fdPipe[0], gszKeyVal, KEYLEN);
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close(fdPipe[0]);
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if (iCount < 0)
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{
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/*
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* This should be a rare occurrence. See the above comment under
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* the waitpid failure condition for user recovery steps.
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*/
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LogFrontPageError(s, "Could not read random numbers", 0,
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"FrontPageInit()", TRUE);
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return;
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}
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gszKeyVal[iCount] = 0;
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sscanf(gszKeyVal, "%u %u %u %u", &v2, &v1, &v4, &v3);
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if (v1 == npos || v2 == npos || v3 == npos || v4 == npos)
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{
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/*
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* This should be a rare occurrence. See the above comment under
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* the waitpid failure condition for user recovery steps.
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*/
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LogFrontPageError(s, "Could not scan random numbers", 0,
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"FrontPageInit()", TRUE);
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return;
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}
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iRandom[2] = (v1 << 16) + v2 + (v4 << 12) + v3;
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}
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else
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{
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/*
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* I am the child process. Create a random number which shouldn't
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* be easily duplicated.
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*/
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if (dup2(fdPipe[1], 1) == -1)
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exit(1); /* Parent picks up the error */
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close(fdPipe[0]);
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#ifdef LINUX
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#define RAND_CMD "/bin/ps laxww | /usr/bin/sum ; /bin/ps laxww | /usr/bin/sum"
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#else
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#if defined ( bsdi ) || ( defined ( BSD ) && ( BSD >= 199103 ))
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#define RAND_CMD "/bin/ps laxww | /usr/bin/cksum -o 1 ; /bin/ps laxww | /usr/bin/cksum -o 1"
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#else
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#define RAND_CMD "/bin/ps -ea | /bin/sum ; /bin/ps -ea | /bin/sum"
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#endif
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#endif
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execl("/bin/sh", "/bin/sh", "-c", RAND_CMD, NULL);
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exit(1);
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}
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gettimeofday(&tp, &tz);
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iRandom[3] = tp.tv_sec;
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iRandom[4] = tp.tv_usec | tp.tv_usec << 20;
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/*
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* See if there is an 'suidkey' file to merge into our key.
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*/
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if (Vstat(KEYFILEXOR, &fs) == -1)
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{
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/*
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* It's a security violation if the key file is not present. User
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* recovery: Make sure the key file is present and properly protected
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* (owned by root, permissions r**------).
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*/
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LogFrontPageError(s, "The key file \"%-.1024s\" does not exist",
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KEYFILEXOR, "FrontPageInit()", TRUE);
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return;
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}
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else
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{
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int i, iCount;
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char szBuf[KEYLEN];
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if ((fs.st_mode & (S_IRWXG | S_IRWXO)) || fs.st_uid)
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{
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/*
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* It's a security violation if the key file is not owned by root,
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* and is not protected from all other group. User recovery: Make
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* sure the key file is properly protected (owned by root,
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* permissions r**------).
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*/
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LogFrontPageError(s, "The key file \"%-.1024s\" must be owned by root and have permissions r**------",
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KEYFILEXOR, "FrontPageInit()", TRUE);
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return;
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}
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if ((fd = open(KEYFILEXOR, O_RDONLY)) == -1)
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{
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/*
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* This should be a rare occurrence. User recovery: Make sure
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* the key file exists, is properly owned and protected, and is
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* readable.
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*/
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LogFrontPageError(s, "Cannot open key file \"%-.1024s\"",
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KEYFILEXOR, "FrontPageInit()", TRUE);
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return;
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}
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iCount = read(fd, szBuf, KEYLEN);
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if (iCount < 8)
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{
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/*
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* The keyfile must be at least 8 bytes. If it longer than 128
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* bytes, only the first 128 bytes will be used. Any character
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* value from 0-255 is fine. User recovery: Make sure the key file
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* is at least 8 bytes long.
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*/
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LogFrontPageError(s, "Key file \"%-.1024s\" is unreadable or is too short (must be at least 8 bytes)",
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KEYFILEXOR, "FrontPageInit()", TRUE);
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close(fd);
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return;
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}
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/*
|
|
* Now generate the effective key we'll be using by XORing your key
|
|
* with 5 "random" 32-bit integers. The primary security of this
|
|
* scheme is your key; properly setting it and changing it often keeps
|
|
* the FrontPage SUID scheme secure. All this work above to generate 5
|
|
* random 32-bit integers is soley to make your key somewhat harder to
|
|
* crack (assuming the key files are properly protected). If you don't
|
|
* like the algorithm used to generate the 5 random integers, feel free
|
|
* to substitute as appropriate (check out SGI's Lavarand (TM) at
|
|
* lavarand.sgi.com).
|
|
*/
|
|
for (i = 0; i < KEYLEN; i++)
|
|
gszKeyVal[i] = szBuf[i % iCount] ^ szRandom[i % sizeof(iRandom)];
|
|
|
|
/*
|
|
* Thanks to A.Mayrhofer@Austria.EU.net 980130
|
|
*/
|
|
close(fd);
|
|
}
|
|
|
|
#if defined(SUNOS4)
|
|
pid = getpgrp(0);
|
|
#else
|
|
pid = getpgrp();
|
|
#endif
|
|
sprintf(szKeyFile, KEYFILE, (int)pid);
|
|
|
|
fd = creat(szKeyFile, 0600);
|
|
if (fd < 0)
|
|
{
|
|
/*
|
|
* This should be a rare occurrence, because we're running as root and
|
|
* should always have permission to create the file. User recovery:
|
|
* check that you are not out of disk space, or that the file is not
|
|
* NFS-mounted on a share where you do not have permissions.
|
|
*/
|
|
LogFrontPageError(s, "Could not create key file \"%-.1024s\"",
|
|
szKeyFile, "FrontPageInit()", TRUE);
|
|
return;
|
|
}
|
|
|
|
if (write(fd, gszKeyVal, 128) != 128)
|
|
{
|
|
/*
|
|
* This should be a rare occurrence. User recovery: check that you are
|
|
* not out of disk space.
|
|
*/
|
|
close(fd);
|
|
unlink(szKeyFile);
|
|
LogFrontPageError(s, "Could not write to key file \"%-.1024s\"",
|
|
szKeyFile, "FrontPageInit()", TRUE);
|
|
return;
|
|
}
|
|
|
|
close(fd);
|
|
|
|
/*
|
|
* Everything looks OK enough to start the suid scheme.
|
|
*/
|
|
gbEnabled = TRUE;
|
|
|
|
/*
|
|
* Thanks to Scot Hetzel (hetzels@westbend.net)
|
|
*/
|
|
ap_add_version_component("FrontPage/4.0.4.3");
|
|
}
|
|
|
|
|
|
/*
|
|
* Look for a valid FrontPage extensions scenario and fake a scriptalias if
|
|
* appropriate. If there are any problems, we silently decline.
|
|
*/
|
|
static int FrontPageAlias(
|
|
request_rec* r,
|
|
char* szCgi,
|
|
const char* szFpexe)
|
|
{
|
|
int iLen;
|
|
struct stat webroot;
|
|
struct stat vti_pvt;
|
|
struct stat stub;
|
|
char szBuf[MAXPATHLEN];
|
|
char chSave;
|
|
char szFormat[MAXPATHLEN * 2];
|
|
|
|
/*
|
|
* Decline if we cannot run the stub, or it is writable.
|
|
*/
|
|
if (Vstat(FPSTUB, &stub) == -1 || !(stub.st_mode & S_IXOTH) ||
|
|
stub.st_mode & (S_IWGRP | S_IWOTH))
|
|
{
|
|
/*
|
|
* The stub used to be correctly permissioned; what happened? User
|
|
* recovery: set stub to be owned by by root with permissions
|
|
* r*s*-x*-x.
|
|
*/
|
|
LogFrontPageError(r->server, "Incorrect permissions on stub \"%-.1024s\", must be owned by root with permissions r*s*-x*-x",
|
|
FPSTUB, "FrontPageAlias()", FALSE);
|
|
return DECLINED;
|
|
}
|
|
|
|
chSave = szCgi[1];
|
|
szCgi[1] = '\0';
|
|
ap_translate_name(r);
|
|
szCgi[1] = chSave;
|
|
|
|
/*
|
|
* Zap trailing slash that confuses some OSes.
|
|
*/
|
|
iLen = strlen(r->filename);
|
|
r->filename[--iLen] = 0;
|
|
|
|
if (iLen > MAXPATHLEN - 10)
|
|
return DECLINED;
|
|
sprintf(szBuf, "%s/_vti_pvt", r->filename);
|
|
|
|
/*
|
|
* Decline if webroot and webroot/_vti_pvt don't have the same
|
|
* user and group or uid < LOWEST_VALID_UID or gid < LOWEST_VALID_GID.
|
|
*/
|
|
if (Vstat(szBuf, &vti_pvt) == -1 ||
|
|
vti_pvt.st_uid < LOWEST_VALID_UID ||
|
|
vti_pvt.st_gid < LOWEST_VALID_GID ||
|
|
Vstat(r->filename, &webroot) != 0 ||
|
|
webroot.st_uid != vti_pvt.st_uid ||
|
|
webroot.st_gid != vti_pvt.st_gid)
|
|
{
|
|
/*
|
|
* The webroot and webroot/_vti_pvt don't match. User recovery: fix
|
|
* the owners and groups of both directories to match, and have both a
|
|
* uid and gid in the allowable range.
|
|
*/
|
|
sprintf(szFormat, "Incorrect permissions on webroot \"\%-.0124s\" and webroot's _vti_pvt directory, the owners and groups must match and have a uid >= %d and gid >= %d", LOWEST_VALID_UID, LOWEST_VALID_GID);
|
|
|
|
LogFrontPageError(r->server, szFormat,
|
|
szBuf, "FrontPageAlias()", FALSE);
|
|
return DECLINED;
|
|
}
|
|
|
|
/*
|
|
* If the pipe is active, it was because we previously executed a CGI.
|
|
* That CGI must have finished by now (otherwise we wouldn't be processing
|
|
* this next request), so we can and should close the pipe to avoid a
|
|
* resource leak.
|
|
*/
|
|
if (gbKeyPipeActive)
|
|
{
|
|
close(gfdKeyPipe[0]);
|
|
gbKeyPipeActive = FALSE;
|
|
}
|
|
|
|
/*
|
|
* If we can't get a pipe, that's really bad. We'll log an error, and
|
|
* decline. This should be a rare occurrence. User recovery: check to see
|
|
* why the system cannot allocate a pipe (is the file table full from
|
|
* run-away processes?), and fix the problem or reboot, then try again.
|
|
*/
|
|
if (pipe(gfdKeyPipe) == -1)
|
|
{
|
|
LogFrontPageError(r->server, "pipe() failed", 0,
|
|
"FrontPageAlias()", FALSE);
|
|
return DECLINED;
|
|
}
|
|
|
|
/*
|
|
* Note: ap_pstrdup allocates memory, but it checks for out of memory
|
|
* conditions - it will not return if out of memory.
|
|
*/
|
|
r->handler = ap_pstrdup(r->pool, "cgi-script");
|
|
ap_table_set(r->notes, "alias-forced-type", r->handler);
|
|
|
|
ap_table_set(r->subprocess_env, "FPEXE", ap_pstrdup(r->pool, szFpexe));
|
|
sprintf(szBuf, "%d", webroot.st_uid );
|
|
ap_table_set(r->subprocess_env, "FPUID", ap_pstrdup(r->pool, szBuf));
|
|
sprintf(szBuf, "%d", webroot.st_gid );
|
|
ap_table_set(r->subprocess_env, "FPGID", ap_pstrdup(r->pool, szBuf));
|
|
sprintf(szBuf, "%d", gfdKeyPipe[0]);
|
|
ap_table_set(r->subprocess_env, "FPFD", ap_pstrdup(r->pool, szBuf));
|
|
|
|
r->execfilename = ap_pstrcat(r->pool, FPSTUB, szCgi+strlen(szFpexe), NULL);
|
|
r->filename = ap_pstrcat(r->pool, r->filename, szCgi, NULL);
|
|
|
|
if (write(gfdKeyPipe[1], gszKeyVal, 128) != 128)
|
|
{
|
|
/*
|
|
* If we can't write to the pipe, that's really bad. We'll log an
|
|
* error, and decline. This should be a rare occurrence. User
|
|
* recovery: check to see why the system cannot write to the pipe (is
|
|
* the system being choked with too much load?), and fix the problem or
|
|
* reboot, then try again.
|
|
*/
|
|
LogFrontPageError(r->server, "Write to pipe failed", 0,
|
|
"FrontPageAlias()", FALSE);
|
|
close (gfdKeyPipe[0]);
|
|
close (gfdKeyPipe[1]);
|
|
return DECLINED;
|
|
}
|
|
close(gfdKeyPipe[1]);
|
|
|
|
gbKeyPipeActive = TRUE;
|
|
return OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* This routine looks for shtml.exe, fpcount.exe, author.exe and admin.exe
|
|
* in a URI, and if found we call FrontPageAlias() to check for a valid
|
|
* FrontPage scenario.
|
|
*
|
|
* The return value is OK or DECLINED.
|
|
*/
|
|
static int FrontPageXlate(
|
|
request_rec *r)
|
|
{
|
|
char *szVti;
|
|
char *szCgi;
|
|
|
|
/*
|
|
* Decline if we're improperly initialized.
|
|
*/
|
|
if (!gbEnabled)
|
|
return DECLINED;
|
|
|
|
/*
|
|
* Check once for anything with _vti_bin. This is much faster than
|
|
* checking all four paths, because anything without this is definitely
|
|
* not a FrontPage scenario.
|
|
*/
|
|
if (!(szVti = strstr(r->uri, VTI_BIN)))
|
|
return DECLINED;
|
|
|
|
/*
|
|
* Test for FrontPage server extenders:
|
|
* .../_vti_bin/shtml.exe...
|
|
* .../_vti_bin/shtml.dll...
|
|
* .../_vti_bin/fpcount.exe...
|
|
* .../_vti_bin/_vti_aut/author.exe...
|
|
* .../_vti_bin/_vti_adm/admin.exe...
|
|
*/
|
|
if (szCgi = strstr(szVti, AUTHOR ))
|
|
return FrontPageAlias(r, szCgi, AUTHOR);
|
|
/*
|
|
* Convert inadvertent shtml.dll to shtml.exe
|
|
* Thanks for the idea to Scot Hetzel (hetzels@westbend.net)
|
|
*/
|
|
if (szCgi = strstr(szVti, SHTML2 ))
|
|
{
|
|
int iShtmlExtPos = strlen(SHTML2) - 3;
|
|
strncpy(szCgi + iShtmlExtPos, SHTML + iShtmlExtPos, 3);
|
|
}
|
|
if (szCgi = strstr(szVti, SHTML ))
|
|
return FrontPageAlias(r, szCgi, SHTML);
|
|
if (szCgi = strstr(szVti, ADMIN ))
|
|
return FrontPageAlias(r, szCgi, ADMIN);
|
|
if (szCgi = strstr(szVti, FPCOUNT))
|
|
return FrontPageAlias(r, szCgi, FPCOUNT);
|
|
|
|
return DECLINED;
|
|
}
|
|
|
|
|
|
/*
|
|
* Declare ourselves so the configuration routines can find us.
|
|
*/
|
|
module MODULE_VAR_EXPORT frontpage_module =
|
|
{
|
|
STANDARD_MODULE_STUFF,
|
|
FrontPageInit, /* initializer */
|
|
NULL, /* per-directory config creater */
|
|
NULL, /* dir config merger - default is to override */
|
|
NULL, /* server config creator */
|
|
NULL, /* server config merger */
|
|
NULL, /* command table */
|
|
NULL, /* [6] list of handlers */
|
|
FrontPageXlate, /* [1] filename-to-URI translation */
|
|
NULL, /* [4] check/validate HTTP user_id */
|
|
NULL, /* [5] check HTTP user_id is valid *here* */
|
|
NULL, /* [3] check access by host address, etc. */
|
|
NULL, /* [6] MIME type checker/setter */
|
|
NULL, /* [7] fixups */
|
|
NULL, /* [9] logger */
|
|
NULL, /* [2] header parser */
|
|
NULL, /* child_init */
|
|
NULL, /* child_exit */
|
|
NULL /* post read-request */
|
|
};
|