fixtures/rsa-2048-key

Purpose

Real 2048-bit RSA keypair generated once at module-load time and exposed as canonical RsaPublicKey / RsaPrivateKey shapes for Stage 2+ tests (sign / verify / encrypt / decrypt). The 16-bit synthetic TINY_PRIVATE_KEY fixture in test-keys.ts cannot host a SHA-256 EM (32 bytes is wider than its 2-byte modulus), so signature tests need a real-sized key.

Features

Real 2048-bit keypair via node:crypto.generateKeyPairSync
Decoded into canonical bigint form via finalisePrivateKey / finalisePublicKey
Stable within a single test run (deterministic across all tests in the same process); not deterministic across processes
Re-run cost amortised across the entire Stage 2+ suite (≈ 50 ms once)

Usage

import {
    RSA_2048_PRIVATE_KEY,
    RSA_2048_PUBLIC_KEY,
} from "../__fixtures__/rsa-2048-key.js";

API Reference

`RSA_2048_PUBLIC_KEY: RsaPublicKey`

`RSA_2048_PRIVATE_KEY: RsaPrivateKey`

Implementation Notes

Tests that need byte-exact reference vectors must use one of the RFC 8017 Appendix C / Wycheproof / CAVP fixture files (added incrementally ).
The fixture is not committed bytes-on-disk; regeneration on every test process amortises down to noise once the rest of the suite runs.

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