CSHARP-5626: Add evergreen script to generate CycloneDX SBOM

evergreen/download-augmented-sbom.sh

@@ -21,4 +21,6 @@ echo "KONDUKTO_TOKEN=$kondukto_token" > ${PWD}/kondukto_credentials.env
 docker run --platform="linux/amd64" --rm -v ${PWD}:/pwd \
   --env-file ${PWD}/kondukto_credentials.env \
   artifactory.corp.mongodb.com/release-tools-container-registry-public-local/silkbomb:2.0 \
-  augment --repo mongodb/mongo-csharp-driver --branch main --sbom-in /pwd/sbom.json --sbom-out /pwd/${SSDLC_PATH}/augmented-sbom.json
+  augment --repo mongodb/mongo-csharp-driver --branch main --sbom-in /pwd/sbom.json --sbom-out /pwd/${SSDLC_PATH}/augmented-sbom.json
+
+cp /pwd/${SSDLC_PATH}/augmented-sbom.json ./vex.cdx.json

evergreen/evergreen.yml

@@ -250,6 +250,18 @@ functions:
       params:
         file: mo-expansion.yml
 
+  generate-sbom:
+    - command: shell.exec
+      params:
+        working_dir: "mongo-csharp-driver"
+        env:
+          GITHUB_USER: ${github_user}
+          GITHUB_APIKEY: ${github_apikey}
+          PACKAGE_VERSION: ${PACKAGE_VERSION}
+        script: |
+          ${PREPARE_SHELL}
+          ./evergreen/generate-sbom.sh
+
   download-and-promote-augmented-sbom-to-s3-bucket:
     - command: ec2.assume_role
       params:

evergreen/generate-sbom.sh

@@ -0,0 +1,87 @@
+#!/usr/bin/env bash
+set -o errexit # Exit the script with error if any of the commands fail
+
+# Accommodate Git Bash or MSYS2 on Windows
+export MSYS_NO_PATHCONV=1
+
+echo -e "\n************************************************"
+
+# Get Packages Version if variable is empty
+if [[ -z "$PACKAGE_VERSION" ]]; then
+  PACKAGE_VERSION=$(bash ./evergreen/get-version.sh)
+fi
+
+echo "Package Version: ${PACKAGE_VERSION}"
+
+# Get array of Package Names
+source ./evergreen/packages.sh
+echo "Packages: ${PACKAGES[*]}"
+
+# Run a restore that will set the package version in the Directory.Build.props file, otherwise it is set to "0.0.0-local"
+# This will also cause the Choose...When conditions in the .csproj files to use PackageReference instead of ProjectReference
+echo "Restoring solution with version set to ${PACKAGE_VERSION}"
+dotnet restore /p:Version=${PACKAGE_VERSION}
+
+# Install cyclonedx-dotnet using latest version tested with this script
+echo "Installing cyclonedx-dotnet"
+dotnet tool install --global CycloneDX --version 5.3.1 --allow-downgrade
+
+echo -e "\nGenerating SBOMs"
+echo "************************************************"
+
+# Track SBOM file paths for merging
+SBOM_FILES=""
+
+for package in ${PACKAGES[*]}; do
+  echo -e "\n+++++++++++++++++++++++++++++++++++++"
+  echo "Processing: ${package}"
+
+  SBOM_FILE="sbom.${package}.cdx.json"
+  SBOM_FILES="${SBOM_FILES} /pwd/${SBOM_FILE}"
+
+  echo "SBOM file: ${SBOM_FILE}"
+
+  # There are nuances to how cyclonedx-dotnet handles <PackageReference> items in Directory.Build.props that lead to private packages being included in SBOM
+  # results even when PrivateAssets is set to "All". As a safeguard, this command lists the PackageReferences and adds the references with PrivateAssets="All"
+  # to an exclusion filter variable to be fed into cyclonedx-dotnet
+  EXCLUDE_FILTER=$(dotnet msbuild ./src/${package}/${package}.csproj -getItem:PackageReference | jq -r '[.Items.PackageReference[] | select(.PrivateAssets != null) | select(.PrivateAssets | test ("All"; "i")) | .Identity + "@" + .Version] | join(",")')
+  echo "Excluded Private Package References: ${EXCLUDE_FILTER}"
+
+  # The ProjectReference items do not resolve as the Nuget packages they represent. This causes duplicate components when the SBOMs are merged. To address this
+  # we add the Nuget PURL to the JSON. This command lists the ProjectReferences for processing.
+  PURL_PATCHES=$(dotnet msbuild ./src/${package}/${package}.csproj -getItem:ProjectReference | jq -r '[.Items.ProjectReference[] | .Filename] | join(",")')
+  echo "Project References requiring added PURL: ${PURL_PATCHES}"
+
+  echo "+++++++++++++++++++++++++++++++++++++"
+
+  ## Run cyclonedx-dotnet
+  # Attempt GitHub license resolution only if GITHUB_USER and GITHUB_APIKEY are both set
+  if [[ -v GITHUB_USER && -v GITHUB_APIKEY ]]; then
+    github_options=(--enable-github-licenses --github-username ${GITHUB_USER} --github-token ${GITHUB_APIKEY})
+  fi
+
+  echo "dotnet-CycloneDX src/${package}/${package}.csproj --disable-package-restore --set-type library --set-nuget-purl --exclude-dev --include-project-references --set-name ${package} --set-version ${PACKAGE_VERSION} --filename ${SBOM_FILE} --exclude-filter ${EXCLUDE_FILTER} ${github_options[@]}"
+  dotnet-CycloneDX src/${package}/${package}.csproj \
+    --disable-package-restore --set-type library --set-nuget-purl --exclude-dev --include-project-references \
+    --set-name ${package} --set-version ${PACKAGE_VERSION} --filename ${SBOM_FILE} \
+    --exclude-filter "${EXCLUDE_FILTER}" \
+    "${github_options[@]}"
+
+  # Patch JSON file with PURLs, as needed
+  for patch in $PURL_PATCHES; do
+    echo "Patching ${patch} with Nuget PURL"
+    contents=$(jq --arg package "$patch" --arg version "$PACKAGE_VERSION" '.components |= map(if [.name | startswith("MongoDB.")] and has("purl") == false then .purl = "pkg:nuget/\($package)@\($version)" else . end)' ${SBOM_FILE})
+    echo -E "${contents}" >${SBOM_FILE}
+  done
+
+done
+
+echo -e "\n================================="
+echo "Merging SBOMs using cyclonedx-cli"
+echo "================================="
+
+# Use cyclonedx-cli to merge the SBOMs into 1 hierarchical SBOM
+docker run --platform="linux/amd64" --rm -v ${PWD}:/pwd \
+  cyclonedx/cyclonedx-cli:0.28.2 \
+  merge --input-files ${SBOM_FILES} --output-file /pwd/sbom.cdx.json \
+  --hierarchical --group mongodb --name mongo-csharp-driver --version ${PACKAGE_VERSION}