pymysql: initial integration (#9295)

Signed-off-by: David Korczynski <david@adalogics.com>

Signed-off-by: David Korczynski <david@adalogics.com>

projects/pymysql/Dockerfile

@@ -0,0 +1,19 @@
+#!/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.
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN pip3 install --upgrade pip mock
+RUN git clone https://github.com/PyMySQL/PyMySQL pymysql
+COPY *.sh *py $SRC/
+WORKDIR $SRC/pymysql

projects/pymysql/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 .
+
+# Build fuzzers in $OUT.
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/pymysql/fuzz_connection.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 sys
+import atheris
+import threading
+import socket
+import time
+
+import configparser
+import pymysql
+from pymysql import connections
+
+
+fuzzed_input = b""
+
+# somehow ugly as fuzzing cannot be run in parallel
+def SetFuzzedInput(input_bytes):
+ global fuzzed_input
+ fuzzed_input = input_bytes
+
+class ServerThread(threading.Thread):
+  def __init__(self):
+    self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    self.s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+    self.s.bind(("127.0.0.1", 8001))
+    self.s.listen(1)
+
+    threading.Thread.__init__(self)
+
+  def run(self):
+    global fuzzed_input
+    conn, addr = self.s.accept()
+    conn.settimeout(0.3)
+    try:
+      conn.recv(1024)
+    except:
+      pass
+    conn.send(fuzzed_input)
+    time.sleep(0.005)
+    conn.close()
+    self.s.shutdown(1)
+    self.s.close()
+    time.sleep(0.01)
+
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  local_config_file = "/tmp/my.cnf"
+  with open(local_config_file, "w") as cfg:
+    cfg.write(fdp.ConsumeUnicodeNoSurrogates(1024))
+
+  # Catch config parser errors
+  try:
+    c = connections.Connection(
+      db=None,
+      read_default_file=local_config_file,
+      ssl_disabled=True,
+      defer_connect=True
+    )
+  except configparser.Error:
+    return
+  c.port = 8001
+  c.host = "127.0.0.1"
+
+  SetFuzzedInput(fdp.ConsumeBytes(512))
+  t1 = ServerThread()
+  t1.start()
+
+  try:
+    c.connect(sock=None)
+  except pymysql.err.MySQLError:
+    pass
+  t1.join()
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/pymysql/project.yaml

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