SLSA Verification Summary Attestation (VSA)
A VSA — the attestation a verifier issues so downstream consumers do not have to re-verify the whole chain — recording a PASSED result against a fictional SLSA L3 policy and the level distribution of dependencies. Every package, version, hash and licence is fictional — the tree describes nothing real.
{
"_type": "https://in-toto.io/Statement/v1",
"subject": [
{
"name": "orchard-gateway-4.2.0.tgz",
"digest": {
"sha256": "06af88e316cf889e0b72645f235f77c900d48972456b1ff6ba4df49ae24be734"
}
}
],
"predicateType": "https://slsa.dev/verification_summary/v1",
"predicate": {
"verifier": {
"id": "https://verify.orchard.example/sample-verifier"
},
"timeVerified": "2026-01-01T00:00:00Z",
"resourceUri": "pkg:npm/orchard-gateway@4.2.0",
"policy": {
"uri": "https://policy.orchard.example/sample/slsa-l3.yaml",
"digest": {
"sha256": "300c9b4e8860f45ccf2c81c4b1c09520eab361181d89f8e18c560019135bc5c1"
}
},
"inputAttestations": [
{
"uri": "https://build.orchard.example/attestations/8814",
"digest": {
"sha256": "be16c79bedc4033e7d425083a67d5a8f50460757adda59ed299ac32b5aba6700"
}
}
],
"verificationResult": "PASSED",
"verifiedLevels": [
"SLSA_BUILD_LEVEL_3"
],
"dependencyLevels": {
"SLSA_BUILD_LEVEL_3": 4,
"SLSA_BUILD_LEVEL_2": 3,
"SLSA_BUILD_LEVEL_0": 2
},
"slsaVersion": "1.0"
},
"novus_sample_note": "SAMPLE — fictional supply-chain data. Every package, registry, version, hash, licence, advisory identifier and signature in this document is invented."
}
Specifications
- Seed
- 51200
- Sample Only
- true
- Predicate Type
- slsa.dev/verification_summary/v1
- Verification Result
- PASSED
- Verified Levels
- SLSA_BUILD_LEVEL_3
- Dependency Level Buckets
- 3
- Line Endings
- LF
Testing contract
Expected to pass- Scenario
- Consume a verification summary instead of re-running policy evaluation.
- Expected result
- Consumer reads verificationResult PASSED and SLSA_BUILD_LEVEL_3, and sees that 2 of 9 dependencies are still at level 0.
What is a .json file?
JSON (JavaScript Object Notation) is a lightweight, text-based data-interchange format representing objects, arrays, strings, numbers, booleans, and null. It is language-independent, human-readable, and the dominant format for web APIs and configuration. It requires a single well-formed root value.
How to use this file
Use an example JSON file to test parsers and serializers, schema validation, Unicode and number-precision handling, and API request or response processing.
How to use this file for testing
“SLSA Verification Summary Attestation (VSA)” is a deterministic Novus Examples fixture for JSON parsing, Schema validation, Conversion testing. Flat, deeply nested, JSON Lines, and intentionally invalid JSON for testing parsers and error handling.
Documented properties for this file: seed 51200 · LF. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
SBOM, lockfile, provenance, and advisory fixtures describe the same fabricated component tree across formats, so a converter or scanner can be diffed against a known answer. Every package name, version, hash, and advisory ID is invented — never treat a finding here as real.
Feed the file to your parser and assert it handles the documented quirks — quoted delimiters, embedded newlines, ragged rows, or invalid syntax; the valid↔invalid distinction is labelled in the title.
Code examples
import json
with open("slsa-verification-summary.json") as f:
data = json.load(f)
print(type(data), len(data))Related files
- jsonSBOM Attestation Envelope (cosign Shape)An attestation that binds an SBOM to an artifact digest rather than shipping the SBOM loose — the pattern keyless signing produces, complete with the empty keyid that identity-based signing leaves behind. Signatures, key ids and certificates here are SAMPLE placeholders — the base64 decodes to the words 'SAMPLE SIGNATURE', so verification must fail. Nothing here is cryptographically valid and no key material is real.
- jsoncargo-audit Report (JSON)A cargo-audit report that shows three findings while a fourth is on the ignore list, plus an unmaintained-crate warning — so a gate must decide whether warnings count against it. Advisory identifiers use the invented NOVUS-SAMPLE namespace with SAMPLE-CVE aliases; no identifier here refers to a published CVE, GHSA or OSV record, and no package named exists.
- jsonCSAF 2.0 VEX DocumentA CSAF 2.0 VEX advisory with the nested product tree that CSAF requires — vendor, product name, product version — and product_status buckets rather than a per-statement status field. Advisory identifiers use the invented NOVUS-SAMPLE namespace with SAMPLE-CVE aliases; no identifier here refers to a published CVE, GHSA or OSV record, and no package named exists.
- jsonCycloneDX 1.5 Application SBOM (JSON)A CycloneDX 1.5 SBOM of the same fictional tree, useful for spec-version migration tests: 1.5 introduced the object form of metadata.tools and this file uses it, while dropping the 1.6-only external references. Every package, version, hash and licence is fictional — the tree describes nothing real.
- jsonCycloneDX 1.6 Application SBOM (JSON)A complete CycloneDX 1.6 SBOM in JSON for a fictional application and its nine dependencies, with purls, SHA-256 hashes, supplier records, external references and an explicit dependency graph. Every package, version, hash and licence is fictional — the tree describes nothing real.
- jsonCycloneDX SBOM With Embedded SAMPLE VulnerabilitiesA CycloneDX 1.6 SBOM that carries its own vulnerabilities array — four clearly-marked SAMPLE advisories in the invented NOVUS-SAMPLE namespace, with CVSS v3.1 vectors, CWE classes and affected version ranges. Every package, version, hash and licence is fictional — the tree describes nothing real.
Generated by generation/supply_chain.py. Free for any use, no attribution required — license.