juretta / ruby fork watch download tarball
public
Description: ruby lang (www.ruby-lang.org) svn mirror
Homepage: http://svn.ruby-lang.org/repos/ruby/
Clone URL: git://github.com/juretta/ruby.git
Search Repo: 
* ext/win32ole/win32ole.c (add_event_call_back): remove unused
suke (author)
Fri Jul 25 15:48:25 -0700 2008
commit  a605087642da85b5b9021fd51bcde2f3e97aafb1
tree    fb47d2d73eb990a69dda4b35a1a01da49acd7a5c
parent  14ce1b683141df8253a91284770e40f70755ed1c
ruby / eval_safe.c
100644 112 lines (97 sloc) 2.076 kb
raw history 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112

/* -*-c-*- */
/*
 * This file is included by eval.c
 */
 
/* safe-level:
   0 - strings from streams/environment/ARGV are tainted (default)
   1 - no dangerous operation by tainted value
   2 - process/file operations prohibited
   3 - all generated objects are tainted
   4 - no global (non-tainted) variable modification/no direct output
*/
 
#define SAFE_LEVEL_MAX 4
 
/* $SAFE accessor */
 
int
rb_safe_level(void)
{
    return GET_THREAD()->safe_level;
}
 
void
rb_set_safe_level_force(int safe)
{
    GET_THREAD()->safe_level = safe;
}
 
void
rb_set_safe_level(int level)
{
    rb_thread_t *th = GET_THREAD();
 
    if (level > th->safe_level) {
  if (level > SAFE_LEVEL_MAX) {
      level = SAFE_LEVEL_MAX;
  }
  th->safe_level = level;
    }
}
 
static VALUE
safe_getter(void)
{
    return INT2NUM(rb_safe_level());
}
 
static void
safe_setter(VALUE val)
{
    int level = NUM2INT(val);
    rb_thread_t *th = GET_THREAD();
 
    if (level < th->safe_level) {
  rb_raise(rb_eSecurityError,
     "tried to downgrade safe level from %d to %d",
     th->safe_level, level);
    }
    if (level > SAFE_LEVEL_MAX) {
  level = SAFE_LEVEL_MAX;
    }
    th->safe_level = level;
}
 
void
rb_secure(int level)
{
    if (level <= rb_safe_level()) {
  if (rb_frame_callee()) {
      rb_raise(rb_eSecurityError, "Insecure operation `%s' at level %d",
         rb_id2name(rb_frame_callee()), rb_safe_level());
  }
  else {
      rb_raise(rb_eSecurityError, "Insecure operation at level %d",
         rb_safe_level());
  }
    }
}
 
void
rb_secure_update(VALUE obj)
{
    if (!OBJ_TAINTED(obj))
  rb_secure(4);
}
 
void
rb_check_safe_obj(VALUE x)
{
    if (rb_safe_level() > 0 && OBJ_TAINTED(x)) {
  if (rb_frame_callee()) {
      rb_raise(rb_eSecurityError, "Insecure operation - %s",
         rb_id2name(rb_frame_callee()));
  }
  else {
      rb_raise(rb_eSecurityError, "Insecure operation: -r");
  }
    }
    rb_secure(4);
}
 
void
rb_check_safe_str(VALUE x)
{
    rb_check_safe_obj(x);
    if (TYPE(x) != T_STRING) {
  rb_raise(rb_eTypeError, "wrong argument type %s (expected String)",
     rb_obj_classname(x));
    }
}