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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 kWrappingData = {
'RSA-OAEP': {
generate: {
modulusLength: 4096,
publicExponent: new Uint8Array([1, 0, 1]),
hash: 'SHA-256',
},
wrap: { label: new Uint8Array(8) },
pair: true
},
'AES-CTR': {
generate: { length: 128 },
wrap: { counter: new Uint8Array(16), length: 64 },
pair: false
},
'AES-CBC': {
generate: { length: 128 },
wrap: { iv: new Uint8Array(16) },
pair: false
},
'AES-GCM': {
generate: { length: 128 },
wrap: {
iv: new Uint8Array(16),
additionalData: new Uint8Array(16),
tagLength: 64
},
pair: false
},
'AES-KW': {
generate: { length: 128 },
wrap: { },
pair: false
}
};
function generateWrappingKeys() {
return Promise.all(Object.keys(kWrappingData).map(async (name) => {
const keys = await subtle.generateKey(
{ name, ...kWrappingData[name].generate },
true,
['wrapKey', 'unwrapKey']);
if (kWrappingData[name].pair) {
kWrappingData[name].wrappingKey = keys.publicKey;
kWrappingData[name].unwrappingKey = keys.privateKey;
} else {
kWrappingData[name].wrappingKey = keys;
kWrappingData[name].unwrappingKey = keys;
}
}));
}
async function generateKeysToWrap() {
const parameters = [
{
algorithm: {
name: 'RSASSA-PKCS1-V1_5',
modulusLength: 1024,
publicExponent: new Uint8Array([1, 0, 1]),
hash: 'SHA-256'
},
privateUsages: ['sign'],
publicUsages: ['verify'],
pair: true,
},
{
algorithm: {
name: 'RSA-PSS',
modulusLength: 1024,
publicExponent: new Uint8Array([1, 0, 1]),
hash: 'SHA-256'
},
privateUsages: ['sign'],
publicUsages: ['verify'],
pair: true,
},
{
algorithm: {
name: 'RSA-OAEP',
modulusLength: 1024,
publicExponent: new Uint8Array([1, 0, 1]),
hash: 'SHA-256'
},
privateUsages: ['decrypt'],
publicUsages: ['encrypt'],
pair: true,
},
{
algorithm: {
name: 'ECDSA',
namedCurve: 'P-384'
},
privateUsages: ['sign'],
publicUsages: ['verify'],
pair: true,
},
{
algorithm: {
name: 'ECDH',
namedCurve: 'P-384'
},
privateUsages: ['deriveBits'],
publicUsages: [],
pair: true,
},
{
algorithm: {
name: 'AES-CTR',
length: 128
},
usages: ['encrypt', 'decrypt'],
pair: false,
},
{
algorithm: {
name: 'AES-CBC',
length: 128
},
usages: ['encrypt', 'decrypt'],
pair: false,
},
{
algorithm: {
name: 'AES-GCM', length: 128
},
usages: ['encrypt', 'decrypt'],
pair: false,
},
{
algorithm: {
name: 'AES-KW',
length: 128
},
usages: ['wrapKey', 'unwrapKey'],
pair: false,
},
{
algorithm: {
name: 'HMAC',
length: 128,
hash: 'SHA-256'
},
usages: ['sign', 'verify'],
pair: false,
}
];
const allkeys = await Promise.all(parameters.map(async (params) => {
const usages = 'usages' in params ?
params.usages :
params.publicUsages.concat(params.privateUsages);
const keys = await subtle.generateKey(params.algorithm, true, usages);
if (params.pair) {
return [
{
algorithm: params.algorithm,
usages: params.publicUsages,
key: keys.publicKey,
},
{
algorithm: params.algorithm,
usages: params.privateUsages,
key: keys.privateKey,
}
];
}
return [{
algorithm: params.algorithm,
usages: params.usages,
key: keys }];
}));
return allkeys.flat();
}
function getFormats(key) {
switch (key.key.type) {
case 'secret': return ['raw', 'jwk'];
case 'public': return ['spki', 'jwk'];
case 'private': return ['pkcs8', 'jwk'];
}
}
// If the wrapping algorithm is AES-KW, the exported key
// material length must be a multiple of 8.
// If the wrapping algorithm is RSA-OAEP, the exported key
// material maximum length is a factor of the modulusLength
async function wrappingIsPossible(name, exported) {
if ('byteLength' in exported) {
switch (name) {
case 'AES-KW':
return exported.byteLength % 8 === 0;
case 'RSA-OAEP':
return exported.byteLength <= 446;
}
} else if ('kty' in exported) {
switch (name) {
case 'AES-KW':
return JSON.stringify(exported).length % 8 === 0;
case 'RSA-OAEP':
return JSON.stringify(exported).length <= 478;
}
}
return true;
}
async function testWrap(wrappingKey, unwrappingKey, key, wrap, format) {
const exported = await subtle.exportKey(format, key.key);
if (!(await wrappingIsPossible(wrappingKey.algorithm.name, exported)))
return;
const wrapped =
await subtle.wrapKey(
format,
key.key,
wrappingKey,
{ name: wrappingKey.algorithm.name, ...wrap });
const unwrapped =
await subtle.unwrapKey(
format,
wrapped,
unwrappingKey,
{ name: wrappingKey.algorithm.name, ...wrap },
key.algorithm,
true,
key.usages);
assert(unwrapped.extractable);
const exportedAgain = await subtle.exportKey(format, unwrapped);
assert.deepStrictEqual(exported, exportedAgain);
}
async function testWrapping(name, keys, ecdhPeerKey) {
const variations = [];
const {
wrappingKey,
unwrappingKey,
wrap
} = kWrappingData[name];
keys.forEach((key) => {
getFormats(key).forEach((format) => {
variations.push(testWrap(wrappingKey, unwrappingKey, key, wrap, format));
});
});
return Promise.all(variations);
}
(async function() {
await generateWrappingKeys();
const keys = await generateKeysToWrap();
const ecdhPeerKey = await subtle.generateKey({
name: 'ECDH',
namedCurve: 'P-384'
}, true, ['deriveBits']);
const variations = [];
Object.keys(kWrappingData).forEach((name) => {
return testWrapping(name, keys, ecdhPeerKey);
});
await Promise.all(variations);
})().then(common.mustCall());
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