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@tillstack/notary-core

v0.1.0

Published

TillNotary core — RFC 6962 Merkle transparency-log algebra (inclusion + consistency proofs over an insert-only node store), pure RFC 9162 proof verifiers, crypto-agility suites with hybrid Ed25519 + ML-DSA signatures (FIPS 204), signed checkpoint notes an

Vulnerabilities

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Links

Git

Maintainers

tillafricatillafrica

Keywords

tilldevtillnotarytransparency-logmerklerfc6962notarytimestampingpost-quantum

Readme

@tillstack/notary-core

The math behind TillNotary, as pure functions with no I/O. It runs on Node and Cloudflare Workers.

  • RFC 6962 Merkle tree: leaf/node hashing, inclusion and consistency paths
  • RFC 9162 proof verifiers that return false on anything malformed and never throw on hostile input
  • Hybrid signatures: Ed25519 and ML-DSA (FIPS 204). A forgery has to break both.
  • Signed checkpoint notes, witness cosignatures and refusals
  • Crypto-agility suites: sig-ed25519-mldsa65-sha256.v1 (default) and sig-ed25519-mldsa87-sha384.v1 (CNSA 2.0 floor)

Every primitive comes from the audited @noble/* libraries. Results are validated against an independent cross-implementation test-vector suite.

Most apps want @tillstack/sdk-notary-node, which uses this package to verify every server response. Use this package directly to verify proofs in your own code.

Install

npm install @tillstack/notary-core

Verify an inclusion proof

import { SHA256, hashLeaf, verifyInclusion } from '@tillstack/notary-core'

const ok = verifyInclusion(SHA256, hashLeaf(SHA256, leafBytes), leafIndex, treeSize, pathBytes, rootHashBytes)

Verify a log only grew

import { SHA256, verifyConsistency } from '@tillstack/notary-core'

const ok = verifyConsistency(SHA256, oldSize, oldRoot, newSize, newRoot, proofBytes)

Docs

https://tilldev.dev/docs/tillnotary/proofs

License

Apache-2.0