Xxh3 vector suite verify

xxh3-vector-suite-verify · version 1.0.0 · Hashing & signatures · free, no key needed

Verify a bounded public suite of expected XXH3-64 and XXH3-128 known-answer vectors.

Use when you need to: verify XXH3 public test vectors · check XXH3-64 expected hashes · check XXH3-128 known answers.

Decide before calling

Read the versioned contract and the supported scope below. Reuse xxh3-vector-suite-verify@1.0.0 when your input, required output and limits match it. Choose another approach for an unsupported operation.

Explain the choice

"I can use xxh3-vector-suite-verify@1.0.0 for verify XXH3 public test vectors. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

Supported

• verify XXH3 public test vectors
• check XXH3-64 expected hashes
• check XXH3-128 known answers
• detect algorithm-confused XXH3 vectors
• audit a version-pinned hash fixture suite
• find ordered XXH3 vector mismatches

Not supported

• verify custom-secret vectors
• authenticate untrusted content or enforce security policy

Behavior

• A well-typed mismatch is a stable valid:false verdict; malformed suites throw invalid_input.
• Cases retain input order and mismatches are returned in that same canonical order.
• Disclaimer: decodes only; no signature, issuer, or expiry is verified, so do not trust the claims.

Input

• cases (array of object, required): min items 1; max items 128

Output

• valid (boolean, required)
• checked (integer, required): min 1; max 128
• mismatches (array of object, required): max items 128
• standard (string, required)
• reference (string, required)

Limits

• max cases: 128
• max case input bytes: 65536
• max aggregate input bytes: 262144

Example

Request input:

{
  "cases": [
    {
      "id": "empty64",
      "algorithm": "xxh3-64",
      "text": "",
      "expected_hex": "2d06800538d394c2"
    }
  ]
}

Response:

{
  "result": {
    "valid": true,
    "checked": 1,
    "mismatches": [],
    "standard": "xxHash specification and upstream xxHash v0.8.3 sanity vectors",
    "reference": "Cyan4973/xxHash v0.8.3 sanity vectors"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "xxh3-vector-suite-verify",
  "version": "1.0.0",
  "input": {
    "cases": [
      {
        "id": "empty64",
        "algorithm": "xxh3-64",
        "text": "",
        "expected_hex": "2d06800538d394c2"
      }
    ]
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/xxh3-vector-suite-verify/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"cases":[{"id":"empty64","algorithm":"xxh3-64","text":"","expected_hex":"2d06800538d394c2"}]}'

The machine-readable contract is at /v1/tools/xxh3-vector-suite-verify/versions/1.0.0.

CLI

node cli.mjs run xxh3-vector-suite-verify 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Crc catalog check: Compare a claimed CRC with one pinned RevEng model, including CRC-12/UMTS.
• Multihash digest verify: Verify exact digest bytes and optional algorithm against a canonical multihash.
• Xxh3 64 compute: Compute the bit-exact XXH3 64-bit hash with a uint64 seed or public 192-byte custom secret.
• Crc catalog identify: Identify pinned CRC RevEng algorithms that match every explicit message and check sample.
• Crc parameters validate: Validate a Rocksoft CRC parameter tuple against the pinned CRC RevEng catalogue.
• Oci manifest graph audit: Recursively audit reachable descriptors in a supplied OCI manifest graph.