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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 03:10:21 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 03:10:21 -0500
commitc0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch)
tree5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/httpd-2.0.64/support/suexec.c
parentb6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff)
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2 Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/support/suexec.c')
-rw-r--r--rubbos/app/httpd-2.0.64/support/suexec.c619
1 files changed, 0 insertions, 619 deletions
diff --git a/rubbos/app/httpd-2.0.64/support/suexec.c b/rubbos/app/httpd-2.0.64/support/suexec.c
deleted file mode 100644
index 06e55c4d..00000000
--- a/rubbos/app/httpd-2.0.64/support/suexec.c
+++ /dev/null
@@ -1,619 +0,0 @@
-/* Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/*
- * suexec.c -- "Wrapper" support program for suEXEC behaviour for Apache
- *
- ***********************************************************************
- *
- * NOTE! : DO NOT edit this code!!! Unless you know what you are doing,
- * editing this code might open up your system in unexpected
- * ways to would-be crackers. Every precaution has been taken
- * to make this code as safe as possible; alter it at your own
- * risk.
- *
- ***********************************************************************
- *
- *
- */
-
-#include "apr.h"
-#include "ap_config.h"
-#include "suexec.h"
-
-#include <sys/param.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <string.h>
-#include <time.h>
-#if APR_HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
-#include <stdio.h>
-#include <stdarg.h>
-#include <stdlib.h>
-
-#ifdef HAVE_PWD_H
-#include <pwd.h>
-#endif
-
-#ifdef HAVE_GRP_H
-#include <grp.h>
-#endif
-
-/*
- ***********************************************************************
- * There is no initgroups() in QNX, so I believe this is safe :-)
- * Use cc -osuexec -3 -O -mf -DQNX suexec.c to compile.
- *
- * May 17, 1997.
- * Igor N. Kovalenko -- infoh@mail.wplus.net
- ***********************************************************************
- */
-
-#if defined(NEED_INITGROUPS)
-int initgroups(const char *name, gid_t basegid)
-{
- /* QNX and MPE do not appear to support supplementary groups. */
- return 0;
-}
-#endif
-
-#if defined(SUNOS4)
-extern char *sys_errlist[];
-#define strerror(x) sys_errlist[(x)]
-#endif
-
-#if defined(PATH_MAX)
-#define AP_MAXPATH PATH_MAX
-#elif defined(MAXPATHLEN)
-#define AP_MAXPATH MAXPATHLEN
-#else
-#define AP_MAXPATH 8192
-#endif
-
-#define AP_ENVBUF 256
-
-extern char **environ;
-static FILE *log = NULL;
-
-char *safe_env_lst[] =
-{
- /* variable name starts with */
- "HTTP_",
- "SSL_",
-
- /* variable name is */
- "AUTH_TYPE=",
- "CONTENT_LENGTH=",
- "CONTENT_TYPE=",
- "DATE_GMT=",
- "DATE_LOCAL=",
- "DOCUMENT_NAME=",
- "DOCUMENT_PATH_INFO=",
- "DOCUMENT_ROOT=",
- "DOCUMENT_URI=",
- "FILEPATH_INFO=",
- "GATEWAY_INTERFACE=",
- "HTTPS=",
- "LAST_MODIFIED=",
- "PATH_INFO=",
- "PATH_TRANSLATED=",
- "QUERY_STRING=",
- "QUERY_STRING_UNESCAPED=",
- "REMOTE_ADDR=",
- "REMOTE_HOST=",
- "REMOTE_IDENT=",
- "REMOTE_PORT=",
- "REMOTE_USER=",
- "REDIRECT_QUERY_STRING=",
- "REDIRECT_REMOTE_USER=",
- "REDIRECT_STATUS=",
- "REDIRECT_URL=",
- "REQUEST_METHOD=",
- "REQUEST_URI=",
- "SCRIPT_FILENAME=",
- "SCRIPT_NAME=",
- "SCRIPT_URI=",
- "SCRIPT_URL=",
- "SERVER_ADMIN=",
- "SERVER_NAME=",
- "SERVER_ADDR=",
- "SERVER_PORT=",
- "SERVER_PROTOCOL=",
- "SERVER_SIGNATURE=",
- "SERVER_SOFTWARE=",
- "UNIQUE_ID=",
- "USER_NAME=",
- "TZ=",
- NULL
-};
-
-
-static void err_output(const char *fmt, va_list ap)
-{
-#ifdef AP_LOG_EXEC
- time_t timevar;
- struct tm *lt;
-
- if (!log) {
- if ((log = fopen(AP_LOG_EXEC, "a")) == NULL) {
- fprintf(stderr, "failed to open log file\n");
- perror("fopen");
- exit(1);
- }
- }
-
- time(&timevar);
- lt = localtime(&timevar);
-
- fprintf(log, "[%d-%.2d-%.2d %.2d:%.2d:%.2d]: ",
- lt->tm_year + 1900, lt->tm_mon + 1, lt->tm_mday,
- lt->tm_hour, lt->tm_min, lt->tm_sec);
-
- vfprintf(log, fmt, ap);
-
- fflush(log);
-#endif /* AP_LOG_EXEC */
- return;
-}
-
-static void log_err(const char *fmt,...)
-{
-#ifdef AP_LOG_EXEC
- va_list ap;
-
- va_start(ap, fmt);
- err_output(fmt, ap);
- va_end(ap);
-#endif /* AP_LOG_EXEC */
- return;
-}
-
-static void clean_env(void)
-{
- char pathbuf[512];
- char **cleanenv;
- char **ep;
- int cidx = 0;
- int idx;
-
- /* While cleaning the environment, the environment should be clean.
- * (e.g. malloc() may get the name of a file for writing debugging info.
- * Bad news if MALLOC_DEBUG_FILE is set to /etc/passwd. Sprintf() may be
- * susceptible to bad locale settings....)
- * (from PR 2790)
- */
- char **envp = environ;
- char *empty_ptr = NULL;
-
- environ = &empty_ptr; /* VERY safe environment */
-
- if ((cleanenv = (char **) calloc(AP_ENVBUF, sizeof(char *))) == NULL) {
- log_err("failed to malloc memory for environment\n");
- exit(120);
- }
-
- sprintf(pathbuf, "PATH=%s", AP_SAFE_PATH);
- cleanenv[cidx] = strdup(pathbuf);
- cidx++;
-
- for (ep = envp; *ep && cidx < AP_ENVBUF-1; ep++) {
- for (idx = 0; safe_env_lst[idx]; idx++) {
- if (!strncmp(*ep, safe_env_lst[idx],
- strlen(safe_env_lst[idx]))) {
- cleanenv[cidx] = *ep;
- cidx++;
- break;
- }
- }
- }
-
- cleanenv[cidx] = NULL;
-
- environ = cleanenv;
-}
-
-int main(int argc, char *argv[])
-{
- int userdir = 0; /* ~userdir flag */
- uid_t uid; /* user information */
- gid_t gid; /* target group placeholder */
- char *target_uname; /* target user name */
- char *target_gname; /* target group name */
- char *target_homedir; /* target home directory */
- char *actual_uname; /* actual user name */
- char *actual_gname; /* actual group name */
- char *prog; /* name of this program */
- char *cmd; /* command to be executed */
- char cwd[AP_MAXPATH]; /* current working directory */
- char dwd[AP_MAXPATH]; /* docroot working directory */
- struct passwd *pw; /* password entry holder */
- struct group *gr; /* group entry holder */
- struct stat dir_info; /* directory info holder */
- struct stat prg_info; /* program info holder */
-
- /*
- * Start with a "clean" environment
- */
- clean_env();
-
- prog = argv[0];
- /*
- * Check existence/validity of the UID of the user
- * running this program. Error out if invalid.
- */
- uid = getuid();
- if ((pw = getpwuid(uid)) == NULL) {
- log_err("crit: invalid uid: (%ld)\n", uid);
- exit(102);
- }
- /*
- * See if this is a 'how were you compiled' request, and
- * comply if so.
- */
- if ((argc > 1)
- && (! strcmp(argv[1], "-V"))
- && ((uid == 0)
-#ifdef _OSD_POSIX
- /* User name comparisons are case insensitive on BS2000/OSD */
- || (! strcasecmp(AP_HTTPD_USER, pw->pw_name)))
-#else /* _OSD_POSIX */
- || (! strcmp(AP_HTTPD_USER, pw->pw_name)))
-#endif /* _OSD_POSIX */
- ) {
-#ifdef AP_DOC_ROOT
- fprintf(stderr, " -D AP_DOC_ROOT=\"%s\"\n", AP_DOC_ROOT);
-#endif
-#ifdef AP_GID_MIN
- fprintf(stderr, " -D AP_GID_MIN=%d\n", AP_GID_MIN);
-#endif
-#ifdef AP_HTTPD_USER
- fprintf(stderr, " -D AP_HTTPD_USER=\"%s\"\n", AP_HTTPD_USER);
-#endif
-#ifdef AP_LOG_EXEC
- fprintf(stderr, " -D AP_LOG_EXEC=\"%s\"\n", AP_LOG_EXEC);
-#endif
-#ifdef AP_SAFE_PATH
- fprintf(stderr, " -D AP_SAFE_PATH=\"%s\"\n", AP_SAFE_PATH);
-#endif
-#ifdef AP_SUEXEC_UMASK
- fprintf(stderr, " -D AP_SUEXEC_UMASK=%03o\n", AP_SUEXEC_UMASK);
-#endif
-#ifdef AP_UID_MIN
- fprintf(stderr, " -D AP_UID_MIN=%d\n", AP_UID_MIN);
-#endif
-#ifdef AP_USERDIR_SUFFIX
- fprintf(stderr, " -D AP_USERDIR_SUFFIX=\"%s\"\n", AP_USERDIR_SUFFIX);
-#endif
- exit(0);
- }
- /*
- * If there are a proper number of arguments, set
- * all of them to variables. Otherwise, error out.
- */
- if (argc < 4) {
- log_err("too few arguments\n");
- exit(101);
- }
- target_uname = argv[1];
- target_gname = argv[2];
- cmd = argv[3];
-
- /*
- * Check to see if the user running this program
- * is the user allowed to do so as defined in
- * suexec.h. If not the allowed user, error out.
- */
-#ifdef _OSD_POSIX
- /* User name comparisons are case insensitive on BS2000/OSD */
- if (strcasecmp(AP_HTTPD_USER, pw->pw_name)) {
- log_err("user mismatch (%s instead of %s)\n", pw->pw_name, AP_HTTPD_USER);
- exit(103);
- }
-#else /*_OSD_POSIX*/
- if (strcmp(AP_HTTPD_USER, pw->pw_name)) {
- log_err("user mismatch (%s instead of %s)\n", pw->pw_name, AP_HTTPD_USER);
- exit(103);
- }
-#endif /*_OSD_POSIX*/
-
- /*
- * Check for a leading '/' (absolute path) in the command to be executed,
- * or attempts to back up out of the current directory,
- * to protect against attacks. If any are
- * found, error out. Naughty naughty crackers.
- */
- if ((cmd[0] == '/') || (!strncmp(cmd, "../", 3))
- || (strstr(cmd, "/../") != NULL)) {
- log_err("invalid command (%s)\n", cmd);
- exit(104);
- }
-
- /*
- * Check to see if this is a ~userdir request. If
- * so, set the flag, and remove the '~' from the
- * target username.
- */
- if (!strncmp("~", target_uname, 1)) {
- target_uname++;
- userdir = 1;
- }
-
- /*
- * Error out if the target username is invalid.
- */
- if (strspn(target_uname, "1234567890") != strlen(target_uname)) {
- if ((pw = getpwnam(target_uname)) == NULL) {
- log_err("invalid target user name: (%s)\n", target_uname);
- exit(105);
- }
- }
- else {
- if ((pw = getpwuid(atoi(target_uname))) == NULL) {
- log_err("invalid target user id: (%s)\n", target_uname);
- exit(121);
- }
- }
-
- /*
- * Error out if the target group name is invalid.
- */
- if (strspn(target_gname, "1234567890") != strlen(target_gname)) {
- if ((gr = getgrnam(target_gname)) == NULL) {
- log_err("invalid target group name: (%s)\n", target_gname);
- exit(106);
- }
- gid = gr->gr_gid;
- actual_gname = strdup(gr->gr_name);
- }
- else {
- gid = atoi(target_gname);
- actual_gname = strdup(target_gname);
- }
-
-#ifdef _OSD_POSIX
- /*
- * Initialize BS2000 user environment
- */
- {
- pid_t pid;
- int status;
-
- switch (pid = ufork(target_uname)) {
- case -1: /* Error */
- log_err("failed to setup bs2000 environment for user %s: %s\n",
- target_uname, strerror(errno));
- exit(150);
- case 0: /* Child */
- break;
- default: /* Father */
- while (pid != waitpid(pid, &status, 0))
- ;
- /* @@@ FIXME: should we deal with STOP signals as well? */
- if (WIFSIGNALED(status)) {
- kill (getpid(), WTERMSIG(status));
- }
- exit(WEXITSTATUS(status));
- }
- }
-#endif /*_OSD_POSIX*/
-
- /*
- * Save these for later since initgroups will hose the struct
- */
- uid = pw->pw_uid;
- actual_uname = strdup(pw->pw_name);
- target_homedir = strdup(pw->pw_dir);
-
- /*
- * Log the transaction here to be sure we have an open log
- * before we setuid().
- */
- log_err("uid: (%s/%s) gid: (%s/%s) cmd: %s\n",
- target_uname, actual_uname,
- target_gname, actual_gname,
- cmd);
-
- /*
- * Error out if attempt is made to execute as root or as
- * a UID less than AP_UID_MIN. Tsk tsk.
- */
- if ((uid == 0) || (uid < AP_UID_MIN)) {
- log_err("cannot run as forbidden uid (%d/%s)\n", uid, cmd);
- exit(107);
- }
-
- /*
- * Error out if attempt is made to execute as root group
- * or as a GID less than AP_GID_MIN. Tsk tsk.
- */
- if ((gid == 0) || (gid < AP_GID_MIN)) {
- log_err("cannot run as forbidden gid (%d/%s)\n", gid, cmd);
- exit(108);
- }
-
- /*
- * Change UID/GID here so that the following tests work over NFS.
- *
- * Initialize the group access list for the target user,
- * and setgid() to the target group. If unsuccessful, error out.
- */
- if (((setgid(gid)) != 0) || (initgroups(actual_uname, gid) != 0)) {
- log_err("failed to setgid (%ld: %s)\n", gid, cmd);
- exit(109);
- }
-
- /*
- * setuid() to the target user. Error out on fail.
- */
- if ((setuid(uid)) != 0) {
- log_err("failed to setuid (%ld: %s)\n", uid, cmd);
- exit(110);
- }
-
- /*
- * Get the current working directory, as well as the proper
- * document root (dependant upon whether or not it is a
- * ~userdir request). Error out if we cannot get either one,
- * or if the current working directory is not in the docroot.
- * Use chdir()s and getcwd()s to avoid problems with symlinked
- * directories. Yuck.
- */
- if (getcwd(cwd, AP_MAXPATH) == NULL) {
- log_err("cannot get current working directory\n");
- exit(111);
- }
-
- if (userdir) {
- if (((chdir(target_homedir)) != 0) ||
- ((chdir(AP_USERDIR_SUFFIX)) != 0) ||
- ((getcwd(dwd, AP_MAXPATH)) == NULL) ||
- ((chdir(cwd)) != 0)) {
- log_err("cannot get docroot information (%s)\n", target_homedir);
- exit(112);
- }
- }
- else {
- if (((chdir(AP_DOC_ROOT)) != 0) ||
- ((getcwd(dwd, AP_MAXPATH)) == NULL) ||
- ((chdir(cwd)) != 0)) {
- log_err("cannot get docroot information (%s)\n", AP_DOC_ROOT);
- exit(113);
- }
- }
-
- if ((strncmp(cwd, dwd, strlen(dwd))) != 0) {
- log_err("command not in docroot (%s/%s)\n", cwd, cmd);
- exit(114);
- }
-
- /*
- * Stat the cwd and verify it is a directory, or error out.
- */
- if (((lstat(cwd, &dir_info)) != 0) || !(S_ISDIR(dir_info.st_mode))) {
- log_err("cannot stat directory: (%s)\n", cwd);
- exit(115);
- }
-
- /*
- * Error out if cwd is writable by others.
- */
- if ((dir_info.st_mode & S_IWOTH) || (dir_info.st_mode & S_IWGRP)) {
- log_err("directory is writable by others: (%s)\n", cwd);
- exit(116);
- }
-
- /*
- * Error out if we cannot stat the program.
- */
- if (((lstat(cmd, &prg_info)) != 0) || (S_ISLNK(prg_info.st_mode))) {
- log_err("cannot stat program: (%s)\n", cmd);
- exit(117);
- }
-
- /*
- * Error out if the program is writable by others.
- */
- if ((prg_info.st_mode & S_IWOTH) || (prg_info.st_mode & S_IWGRP)) {
- log_err("file is writable by others: (%s/%s)\n", cwd, cmd);
- exit(118);
- }
-
- /*
- * Error out if the file is setuid or setgid.
- */
- if ((prg_info.st_mode & S_ISUID) || (prg_info.st_mode & S_ISGID)) {
- log_err("file is either setuid or setgid: (%s/%s)\n", cwd, cmd);
- exit(119);
- }
-
- /*
- * Error out if the target name/group is different from
- * the name/group of the cwd or the program.
- */
- if ((uid != dir_info.st_uid) ||
- (gid != dir_info.st_gid) ||
- (uid != prg_info.st_uid) ||
- (gid != prg_info.st_gid)) {
- log_err("target uid/gid (%ld/%ld) mismatch "
- "with directory (%ld/%ld) or program (%ld/%ld)\n",
- uid, gid,
- dir_info.st_uid, dir_info.st_gid,
- prg_info.st_uid, prg_info.st_gid);
- exit(120);
- }
- /*
- * Error out if the program is not executable for the user.
- * Otherwise, she won't find any error in the logs except for
- * "[error] Premature end of script headers: ..."
- */
- if (!(prg_info.st_mode & S_IXUSR)) {
- log_err("file has no execute permission: (%s/%s)\n", cwd, cmd);
- exit(121);
- }
-
-#ifdef AP_SUEXEC_UMASK
- /*
- * umask() uses inverse logic; bits are CLEAR for allowed access.
- */
- if ((~AP_SUEXEC_UMASK) & 0022) {
- log_err("notice: AP_SUEXEC_UMASK of %03o allows "
- "write permission to group and/or other\n", AP_SUEXEC_UMASK);
- }
- umask(AP_SUEXEC_UMASK);
-#endif /* AP_SUEXEC_UMASK */
-
- /*
- * Be sure to close the log file so the CGI can't
- * mess with it. If the exec fails, it will be reopened
- * automatically when log_err is called. Note that the log
- * might not actually be open if AP_LOG_EXEC isn't defined.
- * However, the "log" cell isn't ifdef'd so let's be defensive
- * and assume someone might have done something with it
- * outside an ifdef'd AP_LOG_EXEC block.
- */
- if (log != NULL) {
- fclose(log);
- log = NULL;
- }
-
- /*
- * Execute the command, replacing our image with its own.
- */
-#ifdef NEED_HASHBANG_EMUL
- /* We need the #! emulation when we want to execute scripts */
- {
- extern char **environ;
-
- ap_execve(cmd, &argv[3], environ);
- }
-#else /*NEED_HASHBANG_EMUL*/
- execv(cmd, &argv[3]);
-#endif /*NEED_HASHBANG_EMUL*/
-
- /*
- * (I can't help myself...sorry.)
- *
- * Uh oh. Still here. Where's the kaboom? There was supposed to be an
- * EARTH-shattering kaboom!
- *
- * Oh well, log the failure and error out.
- */
- log_err("(%d)%s: exec failed (%s)\n", errno, strerror(errno), cmd);
- exit(255);
-}