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'use strict';
const common = require('../common');
if (!common.hasCrypto)
common.skip('missing crypto');
const assert = require('assert');
const { subtle } = require('crypto').webcrypto;
const dsa = require('../fixtures/crypto/dsa');
async function testVerify({
algorithm,
hash,
publicKeyBuffer,
privateKeyBuffer,
signature,
plaintext }) {
const [
publicKey,
noVerifyPublicKey,
privateKey,
hmacKey,
wrongKeys
] = await Promise.all([
subtle.importKey(
'spki',
publicKeyBuffer,
{ name: algorithm.name, hash },
false,
['verify']),
subtle.importKey(
'spki',
publicKeyBuffer,
{ name: algorithm.name, hash },
false,
[ /* No usages */ ]),
subtle.importKey(
'pkcs8',
privateKeyBuffer,
{ name: algorithm.name, hash },
false,
['sign']),
subtle.generateKey(
{ name: 'HMAC', hash: 'SHA-256' },
false,
['sign']),
subtle.generateKey(
{
name: 'ECDSA',
namedCurve: 'P-521',
hash: 'SHA-256',
},
false,
['sign'])
]);
assert(await subtle.verify(algorithm, publicKey, signature, plaintext));
// Test verification with altered buffers
const copy = Buffer.from(plaintext);
const sigcopy = Buffer.from(signature);
const p = subtle.verify(algorithm, publicKey, sigcopy, copy);
copy[0] = 255 - copy[0];
sigcopy[0] = 255 - sigcopy[0];
assert(await p);
// Test failure when using wrong key
await assert.rejects(
subtle.verify(algorithm, privateKey, signature, plaintext), {
message: /Unable to use this key to verify/
});
await assert.rejects(
subtle.verify(algorithm, noVerifyPublicKey, signature, plaintext), {
message: /Unable to use this key to verify/
});
// Test failure when using the wrong algorithms
await assert.rejects(
subtle.verify(algorithm, hmacKey, signature, plaintext), {
message: /Unable to use this key to verify/
});
await assert.rejects(
subtle.verify(algorithm, wrongKeys.publicKey, signature, plaintext), {
message: /Unable to use this key to verify/
});
// Test failure when signature is altered
{
const copy = Buffer.from(signature);
copy[0] = 255 - copy[0];
assert(!(await subtle.verify(algorithm, publicKey, copy, plaintext)));
assert(!(await subtle.verify(
algorithm,
publicKey,
copy.slice(1),
plaintext)));
}
// Test failure when data is altered
{
const copy = Buffer.from(plaintext);
copy[0] = 255 - copy[0];
assert(!(await subtle.verify(algorithm, publicKey, signature, copy)));
}
// Test failure when wrong hash is used
{
const otherhash = hash === 'SHA-1' ? 'SHA-256' : 'SHA-1';
assert(!(await subtle.verify({
...algorithm,
hash: otherhash
}, publicKey, signature, copy)));
}
await assert.rejects(
subtle.verify(
{ ...algorithm, hash: 'sha256' },
publicKey,
signature,
copy),
{ message: /Unrecognized name/ });
}
async function testSign({
algorithm,
hash,
publicKeyBuffer,
privateKeyBuffer,
signature,
plaintext }) {
const [
publicKey,
noSignPrivateKey,
privateKey,
hmacKey,
wrongKeys,
] = await Promise.all([
subtle.importKey(
'spki',
publicKeyBuffer,
{ name: algorithm.name, hash },
false,
['verify']),
subtle.importKey(
'pkcs8',
privateKeyBuffer,
{ name: algorithm.name, hash },
false,
[ /* No usages */ ]),
subtle.importKey(
'pkcs8',
privateKeyBuffer,
{ name: algorithm.name, hash },
false,
['sign']),
subtle.generateKey(
{ name: 'HMAC', hash: 'SHA-256' },
false,
['sign']),
subtle.generateKey(
{
name: 'ECDSA',
namedCurve: 'P-521',
hash: 'SHA-256',
},
false,
['sign'])
]);
{
const sig = await subtle.sign(algorithm, privateKey, plaintext);
assert(await subtle.verify(algorithm, publicKey, sig, plaintext));
}
{
const copy = Buffer.from(plaintext);
const p = subtle.sign(algorithm, privateKey, copy);
copy[0] = 255 - copy[0];
const sig = await p;
assert(await subtle.verify(algorithm, publicKey, sig, plaintext));
}
// Test failure when using wrong key
await assert.rejects(
subtle.sign(algorithm, publicKey, plaintext), {
message: /Unable to use this key to sign/
});
// Test failure when no sign usage
await assert.rejects(
subtle.sign(algorithm, noSignPrivateKey, plaintext), {
message: /Unable to use this key to sign/
});
// Test failure when using the wrong algorithms
await assert.rejects(
subtle.sign(algorithm, hmacKey, plaintext), {
message: /Unable to use this key to sign/
});
await assert.rejects(
subtle.sign(algorithm, wrongKeys.privateKey, plaintext), {
message: /Unable to use this key to sign/
});
}
(async function() {
const variations = [];
dsa().forEach((vector) => {
variations.push(testVerify(vector));
variations.push(testSign(vector));
});
await Promise.all(variations);
})().then(common.mustCall());
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