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Python: Minor cleanup in regex.qll

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This commit is contained in:
Rasmus Wriedt Larsen
2020-03-10 14:00:30 +01:00
parent 2e7807718f
commit 5439059b0d
1 changed files with 13 additions and 15 deletions
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28
python/ql/src/semmle/python/regex.qll
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@@ -19,22 +19,20 @@ private predicate re_module_function(string name, int flags) {
predicate used_as_regex(Expr s, string mode) {
(s instanceof Bytes or s instanceof Unicode)
and
exists(ModuleValue re | re = Module::named("re") |
/* Call to re.xxx(regex, ... [mode]) */
exists(CallNode call, string name |
call.getArg(0).refersTo(_, _, s.getAFlowNode()) and
call.getFunction().pointsTo(re.attr(name)) |
mode = "None"
or
exists(Value obj |
mode = mode_from_mode_object(obj) |
exists(int flags_arg |
re_module_function(name, flags_arg) and
call.getArg(flags_arg).pointsTo(obj)
)
or
call.getArgByName("flags").pointsTo(obj)
/* Call to re.xxx(regex, ... [mode]) */
exists(CallNode call, string name |
call.getArg(0).refersTo(_, _, s.getAFlowNode()) and
call.getFunction().pointsTo(Module::named("re").attr(name)) |
mode = "None"
or
exists(Value obj |
mode = mode_from_mode_object(obj) |
exists(int flags_arg |
re_module_function(name, flags_arg) and
call.getArg(flags_arg).pointsTo(obj)
)
or
call.getArgByName("flags").pointsTo(obj)
)
)
}