configure fuzzing for fips203 (#13092)

works locally

---------

Co-authored-by: Vitor Guidi <[email protected]>

Author: integritychain

projects/fips203/Dockerfile

@@ -0,0 +1,22 @@
+# Copyright 2025 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-rust
+RUN apt-get update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/integritychain/fips203     # or use other version control
+WORKDIR fips203
+ENV FUZZING_LANGUAGE=rust
+COPY build.sh $SRC/

projects/fips203/build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash -eu
+# Copyright 2025 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.
+#
+################################################################################
+
+# build fuzzers, zip corpus
+
+cd $SRC/fips203
+cargo fuzz build -O --debug-assertions
+cp fuzz/target/x86_64-unknown-linux-gnu/release/ml_kem_fuzz $OUT/
+zip -q $OUT/ml_kem_fuzz_seed_corpus.zip fuzz/corpus/ml_kem_fuzz/*
+
+

projects/fips203/project.yaml

@@ -4,3 +4,8 @@ language: rust
 primary_contact: "[email protected]"
 auto_ccs:
   - "[email protected]"
+file_github_issue: true
+sanitizers:
+  - address
+fuzzing_engines:
+  - libfuzzer