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Python: Regexp: Handle repetions {n} (with no ,)

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Rasmus Lerchedahl Petersen
2020-05-18 14:44:11 +02:00
parent 8d41ce1630
commit b56545b236
5 changed files with 12 additions and 5 deletions
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4
python/ql/src/semmle/python/regex.qll
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@@ -472,8 +472,12 @@ abstract class RegexString extends Expr {
this.getChar(endin) = "}" and
end > start and
exists(string multiples | multiples = this.getText().substring(start + 1, endin) |
multiples.regexpMatch("0+") and maybe_empty = true
or
multiples.regexpMatch("0*,[0-9]*") and maybe_empty = true
or
multiples.regexpMatch("0*[1-9][0-9]*") and maybe_empty = false
or
multiples.regexpMatch("0*[1-9][0-9]*,[0-9]*") and maybe_empty = false
) and
not exists(int mid |