From 9e03c7557f0e32ed377724af66ed73878d57370c Mon Sep 17 00:00:00 2001
From: jeffreyc-splunk <jeffreyc@splunk.com>
Date: Wed, 26 Jun 2024 18:33:03 -0400
Subject: [PATCH] fips: otelcol binaries for linux and windows

---
 .github/workflows/otelcol-fips.yml        | 81 +++++++++++++++++++++++
 .gitlab-ci.yml                            | 39 ++++++++++-
 CHANGELOG.md                              |  8 +++
 Makefile                                  | 30 ++++++++-
 cmd/otelcol/fips/build/Dockerfile.linux   | 39 +++++++++++
 cmd/otelcol/fips/build/Dockerfile.windows | 35 ++++++++++
 cmd/otelcol/main_fipsonly.go              | 20 ++++++
 7 files changed, 250 insertions(+), 2 deletions(-)
 create mode 100644 .github/workflows/otelcol-fips.yml
 create mode 100644 cmd/otelcol/fips/build/Dockerfile.linux
 create mode 100644 cmd/otelcol/fips/build/Dockerfile.windows
 create mode 100644 cmd/otelcol/main_fipsonly.go

diff --git a/.github/workflows/otelcol-fips.yml b/.github/workflows/otelcol-fips.yml
new file mode 100644
index 0000000000..c1d6097b8d
--- /dev/null
+++ b/.github/workflows/otelcol-fips.yml
@@ -0,0 +1,81 @@
+name: "otelcol-fips"
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    paths:
+      - '.github/workflows/otelcol-fips.yml'
+      - 'cmd/otelcol/**'
+      - 'internal/**'
+      - 'pkg/**'
+      - 'tests/**'
+      - 'Makefile'
+      - 'Makefile.Common'
+      - 'go.mod'
+      - 'go.sum'
+      - '!**.md'
+      - '!internal/buildscripts/**'
+
+concurrency:
+  group: otelcol-fips-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  GO_VERSION: "1.22.7"
+
+jobs:
+  otelcol-fips:
+    runs-on: ${{ fromJSON('["ubuntu-20.04", "otel-arm64"]')[matrix.GOARCH == 'arm64'] }}
+    strategy:
+      matrix:
+        include:
+          - GOOS: linux
+            GOARCH: amd64
+          - GOOS: linux
+            GOARCH: arm64
+          - GOOS: windows
+            GOARCH: amd64
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache-dependency-path: '**/go.sum'
+      - run: make otelcol-fips
+        env:
+          GOOS: ${{ matrix.GOOS }}
+          GOARCH: ${{ matrix.GOARCH }}
+      - uses: actions/upload-artifact@v4
+        with:
+          name: otelcol-fips-${{ matrix.GOOS }}-${{ matrix.GOARCH }}
+          path: ./bin/*
+
+  win-binary-test:
+    runs-on: windows-2022
+    needs: [ otelcol-fips ]
+    strategy:
+      matrix:
+        FIPSMODE: [ "1", "0" ]
+      fail-fast: false
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: otelcol-fips-windows-amd64
+          path: ./bin
+      - run: Set-ItemProperty -Path HKLM:\System\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy -Name Enabled -Value ${{ matrix.FIPSMODE }}
+      - run: ./bin/otelcol-fips_windows_amd64.exe --version
+        id: run-otelcol
+        continue-on-error: true
+      - run: echo "FIPS enabled, started successfully"
+        if: matrix.FIPSMODE == '1' && steps.run-otelcol.outcome == 'success'
+      - run: throw "FIPS enabled, should not have failed"
+        if: matrix.FIPSMODE == '1' && steps.run-otelcol.outcome == 'failure'
+      - run: echo "FIPS disabled, failed successfully"
+        if: matrix.FIPSMODE == '0' && steps.run-otelcol.outcome == 'failure'
+      - run: throw "FIPS disabled, should have failed"
+        if: matrix.FIPSMODE == '0' && steps.run-otelcol.outcome == 'success'
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7cb43d53cd..cb81c6cc46 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -311,6 +311,40 @@ compile:
       - bin/otelcol_*
       - bin/migratecheckpoint_*
 
+otelcol-fips:
+  image: '${DOCKER_CICD_REPO}/ci-container/golang-1.22:3.4.0'
+  extends:
+    - .trigger-filter
+  stage: build
+  needs: []
+  parallel:
+    matrix:
+      - GOOS: linux
+        GOARCH: amd64
+        TAG: main
+      - GOOS: linux
+        GOARCH: arm64
+        TAG: arm
+      - GOOS: windows
+        GOARCH: amd64
+        TAG: main
+  tags:
+    - $TAG
+  id_tokens:  # http://go/gitlab-17
+    CI_JOB_JWT:
+      aud: $CICD_VAULT_ADDR
+  script:
+    - *docker-reader-role
+    - |
+      if [[ -n "${CI_COMMIT_TAG:-}" ]]; then
+        make otelcol-fips VERSION=${CI_COMMIT_TAG} DOCKER_REPO=${DOCKER_HUB_REPO}
+      else
+        make otelcol-fips DOCKER_REPO=${DOCKER_HUB_REPO}
+      fi
+  artifacts:
+    paths:
+      - bin/otelcol-fips_*
+
 libsplunk:
   extends: .trigger-filter
   stage: build
@@ -437,9 +471,10 @@ sign-exe:
   retry: 2
   needs:
     - compile
+    - otelcol-fips
   parallel:
     matrix:
-      - TARGET: [otelcol]
+      - TARGET: [otelcol, otelcol-fips]
   variables:
     ARTIFACT: bin/${TARGET}_windows_amd64.exe
     SIGN_TYPE: WIN
@@ -1299,6 +1334,7 @@ github-release:
   stage: github-release
   dependencies:
     - compile
+    - otelcol-fips
     - libsplunk
     - sign-exe
     - sign-osx
@@ -1312,6 +1348,7 @@ github-release:
   script:
     - mkdir -p dist/assets
     - cp bin/otelcol_linux_* dist/assets/
+    - cp bin/otelcol-fips_linux_* dist/assets/
     - cp instrumentation/dist/libsplunk_*.so dist/assets/
     - cp dist/signed/* dist/assets/
     - |
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 48481e46ae..ce3c322483 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@
 
 - (Splunk) Deprecate the jaegergrpc monitor ([#5428](https://github.com/signalfx/splunk-otel-collector/pull/5428))
 
+### 💡 Enhancements 💡
+
+- (Splunk) Initial release of standalone collector binaries for Linux (amd64/arm64) and Windows (amd64) with FIPS 140-2 support. These are experimental (alpha) binaries, and it is not suitable to use them in production environments. ([#5378](https://github.com/signalfx/splunk-otel-collector/pull/5378)):
+  - `otelcol-fips_linux_<amd64|arm64>`: Built with [`GOEXPERIMENT=boringcrypto`](https://go.dev/src/crypto/internal/boring/README) and [`crypto/tls/fipsonly`](https://go.dev/src/crypto/tls/fipsonly/fipsonly.go).
+  - `otelcol-fips_windows_amd64.exe`: Built with [`GOEXPERIMENT=cngcrypto`](https://github.com/microsoft/go/blob/microsoft/main/eng/doc/fips/README.md) and [`requirefips`](https://github.com/microsoft/go/blob/microsoft/main/eng/doc/fips/README.md#build-option-to-require-fips-mode) (the collector will panic if FIPS is not enabled on the Windows host).
+  - Smart Agent components are not currently supported.
+  - Download the binaries from the list of assets below.
+
 ## v0.110.0
 
 This Splunk OpenTelemetry Collector release includes changes from the [opentelemetry-collector v0.110.0](https://github.com/open-telemetry/opentelemetry-collector/releases/tag/v0.110.0) and the [opentelemetry-collector-contrib v0.110.0](https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.110.0) releases where appropriate.
diff --git a/Makefile b/Makefile
index cb361c1a6c..24efeb957b 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,7 @@ BUILD_X1=-X $(BUILD_INFO_IMPORT_PATH).Version=$(VERSION)
 BUILD_X2=-X $(BUILD_INFO_IMPORT_PATH_CORE).Version=$(VERSION)
 BUILD_INFO=-ldflags "${BUILD_X1} ${BUILD_X2}"
 BUILD_INFO_TESTS=-ldflags "-X $(BUILD_INFO_IMPORT_PATH_TESTS).Version=$(VERSION)"
+CGO_ENABLED?=0
 
 JMX_METRIC_GATHERER_RELEASE=$(shell cat internal/buildscripts/packaging/jmx-metric-gatherer-release.txt)
 SKIP_COMPILE=false
@@ -135,13 +136,14 @@ generate-metrics:
 .PHONY: otelcol
 otelcol:
 	go generate ./...
-	GO111MODULE=on CGO_ENABLED=0 go build -trimpath -o ./bin/otelcol_$(GOOS)_$(GOARCH)$(EXTENSION) $(BUILD_INFO) ./cmd/otelcol
+	GO111MODULE=on CGO_ENABLED=$(CGO_ENABLED) go build -trimpath -o ./bin/otelcol_$(GOOS)_$(GOARCH)$(EXTENSION) $(BUILD_INFO) ./cmd/otelcol
 ifeq ($(OS), Windows_NT)
 	$(LINK_CMD) .\bin\otelcol$(EXTENSION) .\bin\otelcol_$(GOOS)_$(GOARCH)$(EXTENSION)
 else
 	$(LINK_CMD) otelcol_$(GOOS)_$(GOARCH)$(EXTENSION) ./bin/otelcol$(EXTENSION)
 endif
 
+
 .PHONY: migratecheckpoint
 migratecheckpoint:
 	go generate ./...
@@ -241,3 +243,29 @@ install-test-tools:
 integration-test-split: install-test-tools
 	@set -e; cd tests && gotesplit --total=$(GOTESPLIT_TOTAL) --index=$(GOTESPLIT_INDEX) ./... -- -p 1 $(BUILD_INFO_TESTS) --tags=integration -v -timeout 5m -count 1
 
+.PHONY: otelcol-fips
+otelcol-fips:
+ifeq ($(GOOS), linux)
+    ifeq ($(filter $(GOARCH), amd64 arm64),)
+		$(error GOOS=$(GOOS) GOARCH=$(GOARCH) not supported)
+    endif
+	$(eval BUILD_INFO = -ldflags "${BUILD_X1} ${BUILD_X2} -linkmode=external -extldflags=-static")
+else ifeq ($(GOOS), windows)
+    ifeq ($(filter $(GOARCH), amd64),)
+		$(error GOOS=$(GOOS) GOARCH=$(GOARCH) not supported)
+    endif
+	$(eval EXTENSION = .exe)
+else
+	$(error GOOS=$(GOOS) GOARCH=$(GOARCH) not supported)
+endif
+	docker buildx build --pull \
+		--tag otelcol-fips-builder-$(GOOS)-$(GOARCH) \
+		--platform linux/$(GOARCH) \
+		--build-arg DOCKER_REPO=$(DOCKER_REPO) \
+		--build-arg BUILD_INFO='$(BUILD_INFO)' \
+		--file cmd/otelcol/fips/build/Dockerfile.$(GOOS) ./
+	@docker rm -f otelcol-fips-builder-$(GOOS)-$(GOARCH) >/dev/null 2>&1 || true
+	@mkdir -p ./bin
+	docker create --platform linux/$(GOARCH) --name otelcol-fips-builder-$(GOOS)-$(GOARCH) otelcol-fips-builder-$(GOOS)-$(GOARCH) true >/dev/null
+	docker cp otelcol-fips-builder-$(GOOS)-$(GOARCH):/src/bin/otelcol_$(GOOS)_$(GOARCH)$(EXTENSION) ./bin/otelcol-fips_$(GOOS)_$(GOARCH)$(EXTENSION)
+	@docker rm -f otelcol-fips-builder-$(GOOS)-$(GOARCH) >/dev/null
diff --git a/cmd/otelcol/fips/build/Dockerfile.linux b/cmd/otelcol/fips/build/Dockerfile.linux
new file mode 100644
index 0000000000..51862af477
--- /dev/null
+++ b/cmd/otelcol/fips/build/Dockerfile.linux
@@ -0,0 +1,39 @@
+ARG DOCKER_REPO=docker.io
+ARG GO_VERSION=1.22.7
+FROM ${DOCKER_REPO}/golang:${GO_VERSION}
+
+# https://splunk.atlassian.net/wiki/x/qYqRDfs
+ENV BORING_SHA="c1dd71f0ea77e385796db11102c461896ee0824825c773979751983e2bf49912"
+ENV BORING_PATH="src/crypto/internal/boring/syso/goboringcrypto_linux_amd64.syso"
+RUN echo "$BORING_SHA" "$( go env GOROOT )/${BORING_PATH}" | sha256sum --check || ( echo "$BORING_PATH SHA256 doesn't match $BORING_SHA" && exit 1 )
+
+# install toolchain to build a statically linked binary with cgo enabled
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends file musl-dev musl-tools
+
+COPY cmd /src/cmd
+COPY internal /src/internal
+COPY pkg /src/pkg
+COPY Makefile /src/
+COPY Makefile.Common /src/
+COPY go.mod /src/
+COPY go.sum /src/
+
+ARG TARGETARCH
+ARG BUILD_INFO
+ENV GOOS=linux
+ENV GOARCH=${TARGETARCH}
+ENV GOEXPERIMENT=boringcrypto
+ENV GOMODCACHE=/go/pkg/mod
+ENV CGO_ENABLED=1
+ENV CC=musl-gcc
+
+WORKDIR /src
+RUN --mount=type=cache,target=${GOMODCACHE} make otelcol BUILD_INFO="${BUILD_INFO}"
+
+# check the binary
+RUN file ./bin/otelcol_${GOOS}_${GOARCH} | grep -i "statically linked" || ( echo "the binary is not statically linked" && exit 1 )
+RUN go version ./bin/otelcol_${GOOS}_${GOARCH} | grep "X:${GOEXPERIMENT}"
+RUN go tool nm ./bin/otelcol_${GOOS}_${GOARCH} > symbols
+RUN grep -i "fipsonly" symbols
+RUN grep -m5 "_Cfunc__goboringcrypto" symbols
diff --git a/cmd/otelcol/fips/build/Dockerfile.windows b/cmd/otelcol/fips/build/Dockerfile.windows
new file mode 100644
index 0000000000..1bda629500
--- /dev/null
+++ b/cmd/otelcol/fips/build/Dockerfile.windows
@@ -0,0 +1,35 @@
+ARG GO_VERSION=1.22.7
+FROM mcr.microsoft.com/oss/go/microsoft/golang:${GO_VERSION}
+
+ARG TARGETARCH
+
+# install toolchain for cgo
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends gcc-mingw-w64
+
+COPY cmd /src/cmd
+COPY internal /src/internal
+COPY pkg /src/pkg
+COPY Makefile /src/
+COPY Makefile.Common /src/
+COPY go.mod /src/
+COPY go.sum /src/
+
+ARG BUILD_INFO
+ENV GOOS=windows
+ENV GOARCH=${TARGETARCH}
+ENV GOEXPERIMENT=cngcrypto
+ENV GOMODCACHE=/go/pkg/mod
+ENV CGO_ENABLED=1
+ENV CC=x86_64-w64-mingw32-gcc
+ENV CXX=x86_64-w64-mingw32-g++
+ENV GOFLAGS="-tags=requirefips"
+ENV EXTENSION=.exe
+
+WORKDIR /src
+RUN --mount=type=cache,target=${GOMODCACHE} make otelcol BUILD_INFO="${BUILD_INFO}"
+
+# check the binary
+RUN go version ./bin/otelcol_${GOOS}_${GOARCH}${EXTENSION} | grep "X:${GOEXPERIMENT}"
+RUN go tool nm ./bin/otelcol_${GOOS}_${GOARCH}${EXTENSION} > symbols
+RUN grep -m5 "github.com/microsoft/go-crypto-winnative" symbols
diff --git a/cmd/otelcol/main_fipsonly.go b/cmd/otelcol/main_fipsonly.go
new file mode 100644
index 0000000000..ec447b0106
--- /dev/null
+++ b/cmd/otelcol/main_fipsonly.go
@@ -0,0 +1,20 @@
+// Copyright Splunk, Inc.
+// Copyright The OpenTelemetry Authors
+//
+// 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.
+
+//go:build linux && boringcrypto && cgo && (amd64 || arm64)
+
+package main
+
+import _ "crypto/tls/fipsonly"