paramiko: initial integration (#8288)

projects/paramiko/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 pip3 install --upgrade pip
+RUN git clone --depth 1 https://github.com/paramiko/paramiko
+WORKDIR paramiko
+COPY build.sh *.py $SRC/

projects/paramiko/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 .
+cd tests
+cp -rf $SRC/fuzz_*.py .
+for fuzzer in $(find . -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer --add-data loop.py:.
+done

projects/paramiko/fuzz_packetizer.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.
+"""Fuzzer for Packetizer"""
+
+import os
+import sys
+import atheris
+
+from hashlib import sha1
+
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives.ciphers import algorithms, Cipher, modes
+
+from paramiko import Message, Packetizer
+from paramiko.common import byte_chr, zero_byte, asbytes
+
+# Extract path of fuzzer so we can include loop.py
+if getattr(sys, 'frozen', False):
+    app_path = os.path.dirname(sys.executable)
+elif __file__:
+    app_path = os.path.dirname(__file__)
+else:
+    raise Exception("Could not extract path needed to import loop.py")
+sys.path.append(app_path)
+from loop import LoopSocket
+
+def TestOneInput(data):
+    fdp = atheris.FuzzedDataProvider(data)
+
+    rsock = LoopSocket()
+    wsock = LoopSocket()
+    rsock.link(wsock)
+    p = Packetizer(wsock)
+    encryptor = Cipher(
+        algorithms.AES(zero_byte * 16),
+        modes.CBC(byte_chr(fdp.ConsumeIntInRange(0, 255)) * 16),
+        backend=default_backend(),
+    ).encryptor()
+    p.set_outbound_cipher(
+        encryptor,
+        16,
+        sha1,
+        12,
+        byte_chr(fdp.ConsumeIntInRange(0, 255)) * 20
+    )
+
+    m = Message()
+    # Messages need to be at least 16 bytes long, so we'll include
+    # at least 16 items.
+    for i in range(fdp.ConsumeIntInRange(16, 32)):
+        op = fdp.ConsumeIntInRange(0,5)
+        if op == 0:
+            m.add(fdp.ConsumeUnicodeNoSurrogates(20))
+        elif op == 1:
+            m.add(fdp.ConsumeIntInRange(0, 4294967295))
+        elif op == 2:
+            m.add(fdp.ConsumeBool())
+        elif op == 3:
+            l1 = list()
+            for i in range(1, 10):
+                l1.append(fdp.ConsumeUnicodeNoSurrogates(20))
+            m.add(l1)
+        elif op == 4:
+            m.add_bytes(fdp.ConsumeBytes(20))
+        elif op == 5:
+            m.add_byte(byte_chr(fdp.ConsumeIntInRange(0,255)))
+    p.send_message(m)
+    rsock.recv(sys.maxsize)
+
+
+def main():
+    atheris.instrument_all()
+    atheris.Setup(sys.argv, TestOneInput, enable_python_coverage=True)
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    main()

projects/paramiko/project.yaml

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