Initial OSS release of Willow

PiperOrigin-RevId: 820724106

Co-authored-by: James Bell-Clark <jhbell@google.com>
Co-authored-by: Baiyu Li <baiyuli@google.com>
Co-authored-by: Adria Gascon <adriag@google.com>
Co-authored-by: Phillipp Schoppmann <schoppmann@google.com>
Co-authored-by: Pierre Tholoniat <ptholoniat@google.com>

Author: 6 people

.bazelrc

@@ -0,0 +1,5 @@
+# compile with clang on all platforms
+build --action_env=CC=clang
+build --action_env=CXX=clang++
+build --host_action_env=CC=clang
+build --host_action_env=CXX=clang++

.github/workflows/presubmit.yml

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+# 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.
+
+name: Secure Aggregation
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on:
+      labels: ubuntu-24.04
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # pin@v3
+
+      - name: Cache bazel build artifacts
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # pin@v4.2.0
+        with:
+          path: |
+            ~/.cache/bazel
+          key: ${{ runner.os }}-${{ hashFiles('.bazelrc', 'MODULE.bazel') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ hashFiles('.bazelrc', 'MODULE.bazel') }}
+
+      - name: "Run `bazel build`"
+        run: |
+          bazel build -c opt //...
+
+      - name: "Run `bazel test`"
+        run: |
+          bazel test -c opt //...

BUILD

@@ -0,0 +1,40 @@
+# Copyright 2024 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.
+
+load("@rules_license//rules:license.bzl", "license")
+
+package(
+    default_applicable_licenses = [
+    ],
+    default_visibility = [":allowlist"],
+)
+
+license(
+    name = "license",
+    package_name = "secure_aggregation",
+)
+
+package_group(
+    name = "internal",
+    packages = [
+        "//shell_wrapper/...",
+        "//willow/...",
+    ],
+)
+
+licenses(["notice"])
+
+exports_files(
+    ["LICENSE"],
+)

MODULE.bazel

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+"Secure Aggregation"
+
+module(
+    name = "secure_aggregation",
+    version = "0.0.0",
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "rules_rust", version = "0.65.0")
+bazel_dep(name = "rules_cc", version = "0.2.9")
+bazel_dep(name = "rules_license", version = "1.0.0")
+bazel_dep(name = "protobuf", version = "33.0-rc1")
+archive_override(
+    # Patches protobuf to make the Rust libraries visible. See
+    # https://github.com/protocolbuffers/protobuf/issues/23866.
+    module_name = "protobuf",
+    integrity = "sha256-n7r7YMeWhML9K/XhzBWVMXW30fErl3Hfp2hoxLNy+fs=",
+    strip_prefix = "protobuf-b53a3ab3602e5863861589daa2bc48232af330ad",
+    urls = ["https://github.com/google/protobuf/archive/b53a3ab3602e5863861589daa2bc48232af330ad.zip"],
+)
+
+bazel_dep(name = "abseil-cpp", version = "20250814.1")
+bazel_dep(name = "googletest", version = "1.17.0.bcr.1")
+bazel_dep(name = "tink_cc", version = "2.4.0")
+bazel_dep(name = "shell-encryption", version = "0.0.0")
+archive_override(
+    module_name = "shell-encryption",
+    integrity = "sha256-qPgdzLiDGXZwj/p5xOuZRQKvqU/qrS0mI8DLhiBWyi0=",
+    strip_prefix = "shell-encryption-259ce90fdd021d035d237be3dce5ec5a17ff0367",
+    urls = [
+        "https://github.com/google/shell-encryption/archive/259ce90fdd021d035d237be3dce5ec5a17ff0367.zip",
+    ],
+)
+
+bazel_dep(name = "cxx.rs", version = "1.0.186")
+
+crate = use_extension("@rules_rust//crate_universe:extensions.bzl", "crate")
+crate.spec(
+    features = [
+        "alloc",
+        "default",
+        "getrandom",
+        "libc",
+        "small_rng",
+        "std",
+        "std_rng",
+    ],
+    package = "rand",
+    version = "0.8.5",
+)
+crate.spec(
+    features = [
+        "anyhow",
+    ],
+    package = "googletest",
+    version = "0.14.2",
+)
+crate.spec(
+    features = [
+        "alloc",
+        "group",
+        "digest",
+        "precomputed-tables",
+        "rand_core",
+        "zeroize",
+        "serde",
+    ],
+    package = "curve25519-dalek",
+    version = "4.1.3",
+)
+crate.spec(
+    features = [
+        "color",
+        "default",
+        "derive",
+        "env",
+        "error-context",
+        "help",
+        "std",
+        "string",
+        "suggestions",
+        "unstable-ext",
+        "usage",
+        "wrap_help",
+    ],
+    package = "clap",
+    version = "4.5.38",
+)
+crate.spec(
+    features = [],
+    package = "thiserror",
+    version = "1.0.69",
+)
+crate.spec(
+    features = [
+        "default",
+        "std",
+    ],
+    package = "merlin",
+    version = "3.0.0",
+)
+crate.spec(
+    features = [
+        "default",
+        "std",
+    ],
+    package = "sha3",
+    version = "0.10.8",
+)
+crate.from_specs()
+use_repo(crate, crate_index = "crates")