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fixed bug #60116 escapeshellcmd() cannot escape the dangerous quotes.

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This commit is contained in:
Rui Hirokawa 2011-10-23 13:49:54 +00:00
parent 71a94c2225
commit f17a215493
3 changed files with 45 additions and 9 deletions
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1
ext/standard/basic_functions.c
View File

@ -3614,6 +3614,7 @@ PHP_MINIT_FUNCTION(basic) /* {{{ */
#endif
register_phpinfo_constants(INIT_FUNC_ARGS_PASSTHRU);
register_exec_constants(INIT_FUNC_ARGS_PASSTHRU);
register_html_constants(INIT_FUNC_ARGS_PASSTHRU);
register_string_constants(INIT_FUNC_ARGS_PASSTHRU);

49
ext/standard/exec.c
View File

@ -50,6 +50,16 @@
#include <unistd.h>
#endif
/* {{{ register_exec_constants
* */
void register_exec_constants(INIT_FUNC_ARGS)
{
REGISTER_LONG_CONSTANT("ESCAPE_CMD_PAIR", ESCAPE_CMD_PAIR, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ESCAPE_CMD_END", ESCAPE_CMD_END, CONST_PERSISTENT|CONST_CS);
REGISTER_LONG_CONSTANT("ESCAPE_CMD_ALL", ESCAPE_CMD_ALL, CONST_PERSISTENT|CONST_CS);
}
/* }}} */
/* {{{ php_exec
* If type==0, only last line of output is returned (exec)
* If type==1, all lines will be printed and last lined returned (system)
@ -238,7 +248,7 @@ PHP_FUNCTION(passthru)
*NOT* safe for binary strings
*/
PHPAPI char *php_escape_shell_cmd(char *str)
PHPAPI char *php_escape_shell_cmd_ex(char *str, int flag)
{
register int x, y, l = strlen(str);
char *cmd;
@ -266,14 +276,26 @@ PHPAPI char *php_escape_shell_cmd(char *str)
#ifndef PHP_WIN32
case '"':
case '\'':
if (!p && (p = memchr(str + x + 1, str[x], l - x - 1))) {
/* noop */
} else if (p && *p == str[x]) {
p = NULL;
} else {
if (flag == ESCAPE_CMD_ALL) {
cmd[y++] = '\\';
cmd[y++] = str[x];
} else if (flag == ESCAPE_CMD_END) {
if (x == 0 || x == l - 1) {
cmd[y++] = str[x];
} else {
cmd[y++] = '\\';
cmd[y++] = str[x];
}
} else { /* ESCAPE_CMD_PAIR */
if (!p && (p = memchr(str + x + 1, str[x], l - x - 1))) {
/* noop */
} else if (p && *p == str[x]) {
p = NULL;
} else {
cmd[y++] = '\\';
}
cmd[y++] = str[x];
}
cmd[y++] = str[x];
break;
#else
/* % is Windows specific for enviromental variables, ^%PATH% will
@ -327,6 +349,14 @@ PHPAPI char *php_escape_shell_cmd(char *str)
}
/* }}} */
/* {{{ php_escape_shell_cmd
*/
PHPAPI char *php_escape_shell_cmd(char *str)
{
return php_escape_shell_cmd_ex(str, ESCAPE_CMD_PAIR);
}
/* }}} */
/* {{{ php_escape_shell_arg
*/
PHPAPI char *php_escape_shell_arg(char *str)
@ -397,14 +427,15 @@ PHP_FUNCTION(escapeshellcmd)
{
char *command;
int command_len;
long flag = ESCAPE_CMD_PAIR;
char *cmd = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &command, &command_len) == FAILURE) {
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &command, &command_len, &flag) == FAILURE) {
return;
}
if (command_len) {
cmd = php_escape_shell_cmd(command);
cmd = php_escape_shell_cmd_ex(command, flag);
RETVAL_STRING(cmd, 0);
} else {
RETVAL_EMPTY_STRING();

4
ext/standard/exec.h
View File

@ -21,6 +21,10 @@
#ifndef EXEC_H
#define EXEC_H
#define ESCAPE_CMD_PAIR 0
#define ESCAPE_CMD_END 1
#define ESCAPE_CMD_ALL 2
PHP_FUNCTION(system);
PHP_FUNCTION(exec);
PHP_FUNCTION(escapeshellcmd);