pyparsing: initial integration (#8266)

projects/pyparsing/Dockerfile

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+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN apt-get update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/pyparsing/pyparsing pyparsing
+WORKDIR pyparsing
+COPY build.sh *.py $SRC/

projects/pyparsing/build.sh

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+#!/bin/bash -eu
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+pip3 install .
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/pyparsing/fuzz_parse.py

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+#!/usr/bin/python3
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import sys
+import atheris
+
+from pyparsing import (
+    Literal,
+    Word,
+    ZeroOrMore,
+    Group,
+    Dict,
+    Suppress,
+    ParseException,
+)
+
+def dict_parse_generator(fdp):
+    """Generate random parser"""
+    curr = Literal("f")
+    special_chars="[]{}/|\<>:;-="
+    op_count = fdp.ConsumeIntInRange(2, 15)
+    for i in range(op_count):
+        operation = fdp.ConsumeIntInRange(0,4)
+        if operation == 0:
+            l1 = Literal(fdp.PickValueInList(list(special_chars)))
+            l2 = Literal(fdp.PickValueInList(list(special_chars)))
+            word = Word(fdp.ConsumeUnicodeNoSurrogates(10))
+            curr = Group(Dict(ZeroOrMore(word)) + curr)
+        elif operation == 1:
+            word1 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
+            word2 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
+            curr = Group(Dict(OneOrMore(word1, word2)) + curr)
+        elif operation == 2:
+            curr = curr + Word(fdp.ConsumeUnicodeNoSurrogates(10))
+        elif operation == 3:
+            curr = curr + Suppress(fdp.ConsumeUnicodeNoSurrogates(2))
+        else:
+            word1 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
+            word2 = Word(fdp.ConsumeUnicodeNoSurrogates(10))
+            curr = Group(Dict(OneOrMore(word1, word2)) + curr)
+    return Dict(curr)
+
+
+def TestOneInput(data):
+    fdp = atheris.FuzzedDataProvider(data)
+    try:
+        bnf = dict_parse_generator(fdp)
+    except:
+        return
+    
+    try:
+        tokens = bnf.parseString(fdp.ConsumeUnicodeNoSurrogates(1024))
+    except ParseException:
+        pass
+    except TypeError as e:
+        # Catch the TypeError exception from here:
+        # https://github.com/pyparsing/pyparsing/blob/d93930308f7fe79f2290812074f62a472c83db59/pyparsing/core.py#L5674
+        if "could not extract dict values from parsed results" in str(e): 
+            pass
+        else:
+            raise e
+
+
+def main():
+    atheris.instrument_all()
+    atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    main()

projects/pyparsing/project.yaml

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+homepage: "https://github.com/pyparsing/pyparsing"
+language: python
+main_repo: "https://github.com/pyparsing/pyparsing"
+fuzzing_engines:
+- libfuzzer
+sanitizers:
+- address
+- undefined
+vendor_ccs:
+- david@adalogics.com
+- adam@adalogics.com