зеркало из https://github.com/github/ruby.git
128 строки
2.2 KiB
C
128 строки
2.2 KiB
C
/**********************************************************************
|
|
|
|
safe.c -
|
|
|
|
$Author$
|
|
created at: Tue Sep 23 09:44:32 JST 2008
|
|
|
|
Copyright (C) 2008 Yukihiro Matsumoto
|
|
|
|
**********************************************************************/
|
|
|
|
/* safe-level:
|
|
0 - strings from streams/environment/ARGV are tainted (default)
|
|
1 - no dangerous operation by tainted value
|
|
*/
|
|
|
|
#define SAFE_LEVEL_MAX RUBY_SAFE_LEVEL_MAX
|
|
|
|
#include "ruby/ruby.h"
|
|
#include "vm_core.h"
|
|
|
|
/* $SAFE accessor */
|
|
|
|
#undef rb_secure
|
|
#undef rb_set_safe_level
|
|
#undef ruby_safe_level_2_warning
|
|
|
|
int
|
|
ruby_safe_level_2_warning(void)
|
|
{
|
|
return 2;
|
|
}
|
|
|
|
int
|
|
rb_safe_level(void)
|
|
{
|
|
return GET_VM()->safe_level_;
|
|
}
|
|
|
|
void
|
|
rb_set_safe_level_force(int safe)
|
|
{
|
|
GET_VM()->safe_level_ = safe;
|
|
}
|
|
|
|
void
|
|
rb_set_safe_level(int level)
|
|
{
|
|
rb_vm_t *vm = GET_VM();
|
|
|
|
if (level > SAFE_LEVEL_MAX) {
|
|
rb_raise(rb_eArgError, "$SAFE=2 to 4 are obsolete");
|
|
}
|
|
else if (level < 0) {
|
|
rb_raise(rb_eArgError, "$SAFE should be >= 0");
|
|
}
|
|
else {
|
|
int line;
|
|
const char *path = rb_source_location_cstr(&line);
|
|
|
|
if (0) fprintf(stderr, "%s:%d $SAFE %d -> %d\n",
|
|
path ? path : "-", line, vm->safe_level_, level);
|
|
|
|
vm->safe_level_ = level;
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
safe_getter(void)
|
|
{
|
|
return INT2NUM(rb_safe_level());
|
|
}
|
|
|
|
static void
|
|
safe_setter(VALUE val)
|
|
{
|
|
int level = NUM2INT(val);
|
|
rb_set_safe_level(level);
|
|
}
|
|
|
|
void
|
|
rb_secure(int level)
|
|
{
|
|
if (level <= rb_safe_level()) {
|
|
ID caller_name = rb_frame_callee();
|
|
if (caller_name) {
|
|
rb_raise(rb_eSecurityError, "Insecure operation `%"PRIsVALUE"' at level %d",
|
|
rb_id2str(caller_name), rb_safe_level());
|
|
}
|
|
else {
|
|
rb_raise(rb_eSecurityError, "Insecure operation at level %d",
|
|
rb_safe_level());
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_secure_update(VALUE obj)
|
|
{
|
|
}
|
|
|
|
void
|
|
rb_insecure_operation(void)
|
|
{
|
|
ID caller_name = rb_frame_callee();
|
|
if (caller_name) {
|
|
rb_raise(rb_eSecurityError, "Insecure operation - %"PRIsVALUE,
|
|
rb_id2str(caller_name));
|
|
}
|
|
else {
|
|
rb_raise(rb_eSecurityError, "Insecure operation: -r");
|
|
}
|
|
}
|
|
|
|
void
|
|
rb_check_safe_obj(VALUE x)
|
|
{
|
|
if (rb_safe_level() > 0 && OBJ_TAINTED(x)) {
|
|
rb_insecure_operation();
|
|
}
|
|
}
|
|
|
|
void
|
|
Init_safe(void)
|
|
{
|
|
rb_define_virtual_variable("$SAFE", safe_getter, safe_setter);
|
|
}
|