sast-snyk-check: increased version to 0.3

In this version, the severity-threshold argument is introduced and enabled by default to high and the results are parsed with csgrep to be uploaded with the fingerprint. Also, results are filtered using the newly introduced csfilter-kfp and KFP_GIT_URL variable and known false positives won't be shown.

task/sast-snyk-check/0.3/MIGRATION.md

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+# Migration from 0.2 to 0.3
+
+Version 0.3:
+
+- The `--severity-threshold` argument has been introduced and enabled by default with "high" value. Only high or superior vulnerabilities will be shown. Possible values for this argument are: `low`, `medium` and `high`.
+- The results are parsed using `csgrep` and they are uploaded as results with a generated fingerprint.
+- There are no default arguments as "--all-projects --exclude=test*,vendor,deps" are ignored by Snyk Code
+- The results are uploaded as SARIF files to the registry
+- SARIF produced by Snyk Code is not included in the CI log.
+- The findings are filtered using the known-false-positives repository (https://gitlab.cee.redhat.com/osh/known-false-positives/)
+- The KFP_GIT_URL environment variable has been introduced to indicate the repository to filter false positives. If this variable is left empty, the results won't be filtered.
+
+## Action from users
+
+Renovate bot PR will be created with warning icon for a sast-snyk-check which is expected, no action from users are required.

task/sast-snyk-check/0.3/README.md

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+# sast-snyk-check task
+
+## Description:
+
+The sast-snyk-check task uses Snyk Code tool to perform Static Application Security Testing (SAST) for Snyk, a popular cloud-native application security platform.
+
+Snyk's SAST tool uses a combination of static analysis and machine learning techniques to scan an application's source code for potential security vulnerabilities, including common issues such as SQL injection, cross-site scripting (XSS), and code injection attacks.
+
+> NOTE: This task is executed only if the user provides a Snyk token stored in a secret in their namespace. The name of the secret then needs to be supplied in the `snyk-secret` pipeline parameter.
+
+## Params:
+
+| name               | description                                                                                                  |
+|--------------------|--------------------------------------------------------------------------------------------------------------|
+| SNYK_SECRET        | Name of secret which contains Snyk token.                                                                    |
+| ARGS               | Append arguments.                                                                                            |
+| SEVERITY_THRESHOLD | Only vulnerabilities of the specified level or higher are reported (Possible values are low, medium or high) |
+| KFP_GIT_URL        | Link to the known-false-positives repository. If left blank, results won't be filtered                       |
+
+## How to obtain a snyk-token and enable snyk task on the pipeline:
+
+Follow the steps given [here](https://redhat-appstudio.github.io/docs.appstudio.io/Documentation/main/how-to-guides/testing_applications/enable_snyk_check_for_a_product/)
+
+## Results:
+
+| name                  | description              |
+|-----------------------|--------------------------|
+| TEST_OUTPUT     | Tekton task test output. |
+
+## Source repository for image:
+
+https://github.com/konflux-ci/konflux-test
+
+## Additional links:
+
+* https://snyk.io/product/snyk-code/
+* https://snyk.io/

task/sast-snyk-check/0.3/sast-snyk-check.yaml

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+apiVersion: tekton.dev/v1
+kind: Task
+metadata:
+  labels:
+    app.kubernetes.io/version: "0.3"
+  annotations:
+    tekton.dev/pipelines.minVersion: "0.12.1"
+    tekton.dev/tags: "konflux"
+  name: sast-snyk-check
+spec:
+  description: >-
+    Scans source code for security vulnerabilities, including common issues such as SQL injection, cross-site scripting (XSS), and code injection attacks using Snyk Code, a Static Application Security Testing (SAST) tool.
+  results:
+    - description: Tekton task test output.
+      name: TEST_OUTPUT
+  params:
+    - name: SNYK_SECRET
+      description: Name of secret which contains Snyk token.
+      default: snyk-secret
+    - name: ARGS
+      type: string
+      description: Append arguments.
+      default: ""
+    - description: Image URL.
+      name: image-url
+      type: string
+      # In a future 0.4 version of the task, drop the default to make this required
+      default: ""
+    - description: Image digest to report findings for.
+      name: image-digest
+      type: string
+      # In a future 0.4 version of the task, drop the default to make this required
+      default: ""
+    - name: SEVERITY_THRESHOLD
+      type: string
+      description: Report only vulnerabilities at the specified level or higher (Options are low, medium or high).
+      default: "high"
+    - name: KFP_GIT_URL
+      type: string
+      description: URL from repository to download known false positives files
+      default: "https://gitlab.cee.redhat.com/osh/known-false-positives.git"
+
+  volumes:
+    - name: snyk-secret
+      secret:
+        secretName: $(params.SNYK_SECRET)
+        optional: true
+  steps:
+    - name: sast-snyk-check
+      image: quay.io/redhat-appstudio/konflux-test:v1.4.6@sha256:5f298d8d990dfa82023e50029b71b08e19c3c9cedb181dfc4bc86c9ecad8700c
+      # per https://kubernetes.io/docs/concepts/containers/images/#imagepullpolicy-defaulting
+      # the cluster will set imagePullPolicy to IfNotPresent
+      workingDir: $(workspaces.workspace.path)/hacbs/$(context.task.name)
+      volumeMounts:
+        - name: snyk-secret
+          mountPath: "/etc/secrets"
+          readOnly: true
+      env:
+        - name: SNYK_SECRET
+          value: $(params.SNYK_SECRET)
+        - name: ARGS
+          value: $(params.ARGS)
+        - name: SEVERITY_THRESHOLD
+          value: $(params.SEVERITY_THRESHOLD)
+        - name: KFP_GIT_URL
+          value: $(params.KFP_GIT_URL)
+      script: |
+        #!/usr/bin/env bash
+        set -euo pipefail
+        . /utils.sh
+        trap 'handle_error $(results.TEST_OUTPUT.path)' EXIT
+
+        # Installation of Red Hat certificates for cloning Red Hat internal repositories
+        curl -sS https://certs.corp.redhat.com/certs/2015-IT-Root-CA.pem > /etc/pki/ca-trust/source/anchors/2015-RH-IT-Root-CA.crt
+        curl -sS https://certs.corp.redhat.com/certs/2022-IT-Root-CA.pem > /etc/pki/ca-trust/source/anchors/2022-IT-Root-CA.pem
+        update-ca-trust
+        
+        SNYK_TOKEN_PATH="/etc/secrets/snyk_token"
+
+        if [ -f "${SNYK_TOKEN_PATH}" ] && [ -s "${SNYK_TOKEN_PATH}" ]; then
+          # SNYK token is provided
+          SNYK_TOKEN="$(cat ${SNYK_TOKEN_PATH})"
+          export SNYK_TOKEN
+        else
+          to_enable_snyk='[here](https://redhat-appstudio.github.io/docs.appstudio.io/Documentation/main/how-to-guides/testing_applications/enable_snyk_check_for_a_product/)'
+          note="Task $(context.task.name) skipped: If you wish to use the Snyk code SAST task, please create a secret name snyk-secret with the key "snyk_token" containing the Snyk token by following the steps given ${to_enable_snyk}"
+          TEST_OUTPUT=$(make_result_json -r SKIPPED -t "$note")
+          echo "${TEST_OUTPUT}" | tee "$(results.TEST_OUTPUT.path)"
+          exit 0
+        fi
+
+        SNYK_EXIT_CODE=0
+        SOURCE_CODE_DIR=$(workspaces.workspace.path)
+        # shellcheck disable=SC2086
+        # We do want to expand ARGS (it can be multiple CLI flags, not just one)
+        snyk code test $ARGS --severity-threshold=$SEVERITY_THRESHOLD "$SOURCE_CODE_DIR" --max-depth=1 --sarif-file-output=sast_snyk_check_out.json 1>&2>> stdout.txt || SNYK_EXIT_CODE=$?
+        test_not_skipped=0
+        SKIP_MSG="We found 0 supported files"
+        grep -q "$SKIP_MSG" stdout.txt || test_not_skipped=$?
+
+        # In order to generate csdiff/v1, we need to add the whole path of the source code as Snyk only provides an URI to embed the context
+        set -x
+        csgrep --mode=json --prepend-path-prefix="$SOURCE_CODE_DIR"/ sast_snyk_check_out.json | csgrep --mode=json --embed-context 3 | csgrep --mode=json --strip-path-prefix="$SOURCE_CODE_DIR"/source/  > sast_snyk_check_out_all_findings.json
+        set +x
+        
+        # We check if the KFP_GIT_URL variable is set to apply the filters or not
+        if [[ -z "${KFP_GIT_URL}" ]]; then
+          echo "KFP_GIT_URL variable not defined. False positives won't be filtered"
+          mv sast_snyk_check_out_all_findings.json filtered_sast_snyk_check_out.json
+        else
+          echo "Filtering false positives in results files using csfilter-kfp..."
+          csfilter-kfp --verbose --kfp-git-url=$KFP_GIT_URL sast_snyk_check_out_all_findings.json > filtered_sast_snyk_check_out.json
+        fi
+
+        csgrep --mode=sarif filtered_sast_snyk_check_out.json > sast_snyk_check_out.sarif
+        
+        if [[ "$SNYK_EXIT_CODE" -eq 0 ]] || [[ "$SNYK_EXIT_CODE" -eq 1 ]]; then
+          cat sast_snyk_check_out.json
+          TEST_OUTPUT=
+          parse_test_output $(context.task.name) sarif sast_snyk_check_out.sarif  || true
+
+        # When the test is skipped, the "SNYK_EXIT_CODE" is 3 and it can also be 3 in some other situation
+        elif [[ "$test_not_skipped" -eq 0 ]]; then
+          note="Task $(context.task.name) success: Snyk code test found zero supported files."
+          ERROR_OUTPUT=$(make_result_json -r SUCCESS -t "$note")
+        else
+          echo "sast-snyk-check test failed because of the following issues:"
+          cat stdout.txt
+          note="Task $(context.task.name) failed: For details, check Tekton task log."
+          ERROR_OUTPUT=$(make_result_json -r ERROR -t "$note")
+        fi
+        echo "${TEST_OUTPUT:-${ERROR_OUTPUT}}" | tee $(results.TEST_OUTPUT.path)
+
+    - name: upload
+      image: quay.io/konflux-ci/oras:latest@sha256:f4b891ee3038a5f13cd92ff4f473faad5601c2434d1c6b9bccdfc134d9d5f820
+      workingDir: $(workspaces.workspace.path)/hacbs/$(context.task.name)
+      env:
+        - name: IMAGE_URL
+          value: $(params.image-url)
+        - name: IMAGE_DIGEST
+          value: $(params.image-digest)
+      script: |
+        #!/usr/bin/env bash
+
+        UPLOAD_FILE=sast_snyk_check_out.sarif
+        MEDIA_TYPE=application/sarif+json
+
+        if [ -z "${IMAGE_URL}" ] || [ -z "${IMAGE_DIGEST}"  ]; then
+          echo 'No image-url or image-digest param provided. Skipping upload.'
+          exit 0;
+        fi
+
+        if [ ! -f "${UPLOAD_FILE}" ]; then
+          echo "No ${UPLOAD_FILE} exists. Skipping upload."
+          exit 0;
+        fi
+
+        echo "Selecting auth"
+        select-oci-auth $IMAGE_URL > $HOME/auth.json
+        echo "Attaching to ${IMAGE_URL} via the OCI 1.1 Referrers API"
+        oras attach --no-tty --registry-config "$HOME/auth.json" --distribution-spec v1.1-referrers-api --artifact-type "${MEDIA_TYPE}" "${IMAGE_URL}" "${UPLOAD_FILE}:${MEDIA_TYPE}"
+        echo "Attaching to ${IMAGE_URL} via the OCI 1.1 Referrers Tag"
+        oras attach --no-tty --registry-config "$HOME/auth.json" --distribution-spec v1.1-referrers-tag --artifact-type "${MEDIA_TYPE}" "${IMAGE_URL}" "${UPLOAD_FILE}:${MEDIA_TYPE}"
+  workspaces:
+  - name: workspace