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codeql/python/ql
Rasmus Wriedt Larsen b083c01520 Python: Deprecate StringDictKind
This QL

```codeql
import python
import semmle.python.dataflow.TaintTracking
import semmle.python.security.strings.Untrusted

from CollectionKind ck
where
    ck.(DictKind).getMember() instanceof StringKind
    or
    ck.getMember().(DictKind).getMember() instanceof StringKind
select ck, ck.getAQlClass(), ck.getMember().getAQlClass()
```

generates these 6 results.

```
1	{externally controlled string}          ExternalStringDictKind	UntrustedStringKind
2	{externally controlled string}	        StringDictKind	        UntrustedStringKind
3	[{externally controlled string}]	SequenceKind	        ExternalStringDictKind
4	[{externally controlled string}]	SequenceKind	        StringDictKind
5	{{externally controlled string}}	DictKind	        ExternalStringDictKind
6	{{externally controlled string}}	DictKind	        StringDictKind
```

StringDictKind was only used in *one* place in our library code. As illustrated
above, it pollutes our set of TaintKinds. Effectively, every time we make a
flow-step for dictionaries with tainted strings as values, we do it TWICE --
once for ExternalStringDictKind, and once for StringDictKind... that is just a
waste.
2020-05-29 12:06:57 +02:00
..
2020-05-25 13:17:32 +02:00
2020-05-29 12:06:57 +02:00