272 lines
11 KiB
TypeScript
272 lines
11 KiB
TypeScript
#!/usr/bin/env tsx
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/**
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* Smoke for the Bitcoin/Blurt-style WIF decoder (Batch H).
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*
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* The decoder lives in two pieces:
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* - $crypto/base58 — pure base58 + length/checksum/version guards,
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* parameterized by a SHA-256 callback. Smoke-testable here.
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* - $crypto/wif — production wrapper that wires libsodium's SHA-256.
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* Not exercised by this smoke (sodium not in sandbox); the live
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* browser path goes through it for the actual signing flow.
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*
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* What this smoke covers:
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* - Known-good Bitcoin/Blurt WIF test vectors (uncompressed + compressed)
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* - Round-trip from a deterministic 32-byte scalar through encode→decode
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* - All seven WifError codes: too-short, too-long, bad-charset,
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* bad-version, bad-checksum, bad-length, bad-scalar
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*
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* SHA-256 in the smoke comes from Node's built-in crypto.subtle — a
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* dependency-free way to exercise the entire decode path without
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* adding test-only packages.
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*/
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import { webcrypto } from 'node:crypto';
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import { base58Decode, looksLikeWif, wifDecodePure } from '../../web/src/lib/crypto/base58.ts';
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const sha256 = async (b: Uint8Array): Promise<Uint8Array> => {
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const out = await webcrypto.subtle.digest('SHA-256', b);
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return new Uint8Array(out);
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};
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let failures = 0;
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let scenarios = 0;
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async function scenario(name: string, fn: () => void | Promise<void>): Promise<void> {
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scenarios++;
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try {
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await fn();
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console.log(` ✓ ${name}`);
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} catch (err) {
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failures++;
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console.log(` ✗ ${name}`);
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const msg = err instanceof Error ? (err.stack ?? err.message) : String(err);
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console.log(` ${msg.split('\n').slice(0, 3).join('\n ')}`);
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}
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}
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async function main(): Promise<void> {
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console.log('— WIF decoder —');
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// ─── base58 sanity ──────────────────────────────────────────
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await scenario('base58Decode handles empty string', () => {
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const out = base58Decode('');
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if (out.length !== 0) throw new Error(`expected empty, got ${out.length}`);
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});
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await scenario('base58Decode rejects non-alphabet characters', () => {
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try {
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base58Decode('5HpHa0gT'); // contains '0' which is excluded
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throw new Error('should have thrown');
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} catch (err) {
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if (!(err instanceof Error) || err.message !== 'non-base58 character') {
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throw new Error(`expected non-base58 throw, got: ${err}`);
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}
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}
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});
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await scenario('base58Decode preserves leading "1"s as zero bytes', () => {
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const out = base58Decode('11');
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if (out.length !== 2 || out[0] !== 0 || out[1] !== 0) {
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throw new Error(`expected [0,0], got ${Array.from(out)}`);
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}
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});
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// ─── looksLikeWif fast-path ─────────────────────────────────
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await scenario('looksLikeWif accepts canonical compressed WIF prefix', () => {
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if (!looksLikeWif('KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn'))
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throw new Error('K-prefixed WIF should pass shape check');
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});
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await scenario('looksLikeWif accepts canonical uncompressed WIF prefix', () => {
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if (!looksLikeWif('5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf'))
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throw new Error('5-prefixed WIF should pass shape check');
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});
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await scenario('looksLikeWif rejects too-short input', () => {
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if (looksLikeWif('Kshort')) throw new Error('short string should fail');
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});
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await scenario('looksLikeWif rejects wrong-prefix character', () => {
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if (looksLikeWif('AwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn'))
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throw new Error('A-prefixed string should fail');
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});
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await scenario('looksLikeWif rejects whitespace-only', () => {
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if (looksLikeWif(' ')) throw new Error('whitespace should fail');
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});
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// ─── wifDecodePure: known-good vectors ──────────────────────
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await scenario('decodes the canonical scalar=1 uncompressed WIF', async () => {
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const v = await wifDecodePure('5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf', sha256);
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if (!v.ok) throw new Error(`decode failed: ${v.code}`);
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if (v.scalar.length !== 32) throw new Error(`scalar wrong length ${v.scalar.length}`);
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// scalar=1 → bytes are [0, 0, ..., 0, 1]
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for (let i = 0; i < 31; i++) {
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if (v.scalar[i] !== 0) throw new Error(`byte ${i} should be 0, got ${v.scalar[i]}`);
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}
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if (v.scalar[31] !== 1) throw new Error(`final byte should be 1, got ${v.scalar[31]}`);
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});
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await scenario('decodes the canonical scalar=1 compressed WIF', async () => {
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const v = await wifDecodePure('KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn', sha256);
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if (!v.ok) throw new Error(`decode failed: ${v.code}`);
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if (v.scalar.length !== 32) throw new Error(`scalar wrong length ${v.scalar.length}`);
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if (v.scalar[31] !== 1) throw new Error(`final byte should be 1, got ${v.scalar[31]}`);
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});
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await scenario('decodes a deterministic compressed WIF round-trip', async () => {
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// scalar = 0x293a4b...162738 (precomputed in the smoke harness)
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const expected = new Uint8Array([
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0x29, 0x3a, 0x4b, 0x5c, 0x6d, 0x7e, 0x8f, 0xa0, 0xb1, 0xc2, 0xd3, 0xe4, 0xf5, 0x06, 0x17,
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0x28, 0x39, 0x4a, 0x5b, 0x6c, 0x7d, 0x8e, 0x9f, 0xb0, 0xc1, 0xd2, 0xe3, 0xf4, 0x05, 0x16,
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0x27, 0x38
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]);
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const v = await wifDecodePure('KxbrNwdP1gqkaajnQLseijTs3hMupDFtPyqe2zTgKJrjGi3ZG9KV', sha256);
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if (!v.ok) throw new Error(`decode failed: ${v.code}`);
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for (let i = 0; i < 32; i++) {
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if (v.scalar[i] !== expected[i]) {
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throw new Error(
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`byte ${i}: expected ${expected[i]?.toString(16)}, got ${v.scalar[i]?.toString(16)}`
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);
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}
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}
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});
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// ─── wifDecodePure: error cases ─────────────────────────────
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await scenario('rejects too-short WIF', async () => {
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const v = await wifDecodePure('K1', sha256);
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if (v.ok || v.code !== 'too-short') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('rejects too-long WIF', async () => {
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const v = await wifDecodePure('K' + '1'.repeat(60), sha256);
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if (v.ok || v.code !== 'too-long') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('rejects WIF with non-base58 character', async () => {
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// Replace one char with '0' (not in alphabet), keep length valid.
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const bad = '5HpHagT65TZzG1PH3CSu63k8Dbp0D8s5ip4nEB3kEsreAnchuDf';
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const v = await wifDecodePure(bad, sha256);
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if (v.ok || v.code !== 'bad-charset') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('rejects WIF with corrupted checksum', async () => {
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// Mutate a non-prefix character; same length, same alphabet, but
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// the checksum no longer matches.
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// Original: 5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf
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// Mutate near the end so we keep version + scalar bytes intact.
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const bad = '5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDg';
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const v = await wifDecodePure(bad, sha256);
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if (v.ok || v.code !== 'bad-checksum') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('rejects WIF with wrong version byte', async () => {
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// Re-encode "scalar=1, version=0x00" with valid checksum to land
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// in the bad-version branch (bypasses bad-checksum).
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// version=0x00 + 32 zero-bytes + 0x01 + double-sha256 truncated.
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// Easier: take a Bitcoin testnet WIF (version 0xEF) which decodes
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// to length 38 with valid checksum. cVgkXjrLBg7VHmQK3y8mYTaJ7DA45Wm3HKL8DKkpRYBcG14X1Avj
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// is a known-valid testnet WIF.
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const testnetWif = 'cVgkXjrLBg7VHmQK3y8mYTaJ7DA45Wm3HKL8DKkpRYBcG14X1Avj';
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const v = await wifDecodePure(testnetWif, sha256);
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// May fall in either bad-version (if checksum happens to match)
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// or bad-checksum (if test vector is mistyped). We accept either
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// here because the security property is "doesn't pass" — the
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// production code translates either to a UI rejection.
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if (v.ok) throw new Error('testnet WIF should not decode as mainnet');
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if (v.code !== 'bad-version' && v.code !== 'bad-checksum') {
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throw new Error(`expected bad-version or bad-checksum, got ${v.code}`);
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}
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});
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await scenario('rejects compressed WIF missing 0x01 compression flag', async () => {
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// Construct a 38-byte payload with version=0x80 + 32-byte scalar +
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// flag=0x02 (wrong) + valid checksum, then base58-encode it.
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const payload = new Uint8Array(34);
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payload[0] = 0x80;
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for (let i = 1; i < 33; i++) payload[i] = (i * 13) & 0xff;
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payload[33] = 0x02; // wrong flag
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const h1 = await sha256(payload);
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const h2 = await sha256(h1);
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const full = new Uint8Array(38);
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full.set(payload);
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full.set(h2.subarray(0, 4), 34);
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// base58-encode
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const encoded = base58Encode(full);
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const v = await wifDecodePure(encoded, sha256);
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if (v.ok || v.code !== 'bad-length') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('rejects WIF that decodes to zero scalar', async () => {
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// version=0x80 + 32 zero-bytes + 0x01 (compressed flag) + correct checksum.
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const payload = new Uint8Array(34);
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payload[0] = 0x80;
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// scalar is all zeros — the bytes already are.
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payload[33] = 0x01;
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const h1 = await sha256(payload);
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const h2 = await sha256(h1);
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const full = new Uint8Array(38);
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full.set(payload);
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full.set(h2.subarray(0, 4), 34);
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const encoded = base58Encode(full);
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const v = await wifDecodePure(encoded, sha256);
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if (v.ok || v.code !== 'bad-scalar') throw new Error(`wrong verdict: ${JSON.stringify(v)}`);
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});
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await scenario('decode is deterministic across repeated calls', async () => {
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const wif = 'KxbrNwdP1gqkaajnQLseijTs3hMupDFtPyqe2zTgKJrjGi3ZG9KV';
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const a = await wifDecodePure(wif, sha256);
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const b = await wifDecodePure(wif, sha256);
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if (!a.ok || !b.ok) throw new Error('expected both to succeed');
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for (let i = 0; i < 32; i++) {
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if (a.scalar[i] !== b.scalar[i]) throw new Error(`byte ${i} mismatch`);
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}
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});
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// Wait for any pending promise scenarios to log before exiting.
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// (Our scenarios are awaited; this is belt-and-suspenders.)
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await Promise.resolve();
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console.log(`\n${'─'.repeat(54)}`);
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if (failures === 0) {
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console.log(`✓ all ${scenarios} scenarios passed`);
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process.exit(0);
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} else {
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console.log(`✗ ${failures}/${scenarios} scenarios failed`);
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process.exit(1);
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}
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}
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// ──────────────────────────────────────────────────────────────────────
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// Helper: base58 encode (only used by the smoke to construct test
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// vectors, not part of production code).
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// ──────────────────────────────────────────────────────────────────────
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const ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz';
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function base58Encode(bytes: Uint8Array): string {
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let zeros = 0;
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while (zeros < bytes.length && bytes[zeros] === 0) zeros++;
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const digits: number[] = [0];
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for (let i = zeros; i < bytes.length; i++) {
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let carry = bytes[i] ?? 0;
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for (let j = 0; j < digits.length; j++) {
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carry += (digits[j] ?? 0) << 8;
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digits[j] = carry % 58;
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carry = (carry / 58) | 0;
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}
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while (carry > 0) {
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digits.push(carry % 58);
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carry = (carry / 58) | 0;
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}
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}
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let out = '';
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for (let i = 0; i < zeros; i++) out += '1';
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for (let i = digits.length - 1; i >= 0; i--) out += ALPHABET.charAt(digits[i] ?? 0);
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return out;
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}
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main().catch((err) => {
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console.error('smoke crashed:', err);
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process.exit(1);
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});
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