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ECDH tests: allow padded private keys

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This commit is contained in:
Paul Miller 2023-11-01 16:06:40 +00:00
parent a4abd8a202
commit c525356916
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GPG Key ID: 697079DA6878B89B
1 changed files with 9 additions and 1 deletions
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10
test/nist.test.js
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@ -100,10 +100,18 @@ should('fields', () => {
function verifyECDHVector(test, curve) {
if (test.flags.includes('InvalidAsn')) return; // Ignore invalid ASN
if (test.result === 'valid' || test.result === 'acceptable') {
const fnLen = curve.CURVE.nByteLength; // 32 for P256
const fpLen = curve.CURVE.Fp.BYTES; // 32 for P256
const encodedHexLen = fpLen * 2 * 2 + 2; // 130 (65 * 2) for P256
const privA = test.private;
const pubB = test.public.slice(-encodedHexLen); // slice(-130) for P256
let privA = test.private;
// Some wycheproof vectors are padded with 00:
// 00c6cafb74e2a50c83b3d232c4585237f44d4c5433c4b3f50ce978e6aeda3a4f5d
// instead of
// c6cafb74e2a50c83b3d232c4585237f44d4c5433c4b3f50ce978e6aeda3a4f5d
if (privA.length / 2 === fnLen + 1 && privA.startsWith('00')) privA = privA.slice(2);
if (!curve.utils.isValidPrivateKey(privA)) return; // Ignore invalid private key size
try {
curve.ProjectivePoint.fromHex(pubB);