66 lines
1.8 KiB
JavaScript
66 lines
1.8 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var test = require('tape');
|
||
|
|
var crypto = require('../');
|
||
|
|
var randomBytes = require('randombytes');
|
||
|
|
var entries = require('object.entries');
|
||
|
|
|
||
|
|
var randomBytesFunctions = {
|
||
|
|
randomBytes: randomBytes,
|
||
|
|
pseudoRandomBytes: crypto.pseudoRandomBytes
|
||
|
|
};
|
||
|
|
|
||
|
|
// Both randomBytes and pseudoRandomBytes should provide the same interface
|
||
|
|
entries(randomBytesFunctions).forEach(function (entry) {
|
||
|
|
var randomBytesName = entry[0];
|
||
|
|
var randomBytesFn = entry[1];
|
||
|
|
|
||
|
|
test('get error message', function (t) {
|
||
|
|
try {
|
||
|
|
var b = randomBytesFn(10);
|
||
|
|
t.ok(Buffer.isBuffer(b));
|
||
|
|
t.end();
|
||
|
|
} catch (err) {
|
||
|
|
t.ok((/not supported/).test(err.message), '"not supported" is in error message');
|
||
|
|
t.end();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
test(randomBytesName, function (t) {
|
||
|
|
t.plan(5);
|
||
|
|
t.equal(randomBytesFn(10).length, 10);
|
||
|
|
t.ok(Buffer.isBuffer(randomBytesFn(10)));
|
||
|
|
randomBytesFn(10, function (ex, bytes) {
|
||
|
|
t.error(ex);
|
||
|
|
t.equal(bytes.length, 10);
|
||
|
|
t.ok(Buffer.isBuffer(bytes));
|
||
|
|
t.end();
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
test(randomBytesName + ' seem random', function (t) {
|
||
|
|
var L = 1000;
|
||
|
|
var buffer = randomBytesFn(L);
|
||
|
|
|
||
|
|
var mean = Array.prototype.reduce.call(buffer, function (a, b) { return a + b; }, 0) / L;
|
||
|
|
|
||
|
|
// test that the random numbers are plausably random.
|
||
|
|
// Math.random() will pass this, but this will catch
|
||
|
|
// terrible mistakes such as this blunder:
|
||
|
|
// https://github.com/browserify/crypto-browserify/commit/3267955e1df7edd1680e52aeede9a89506ed2464#commitcomment-7916835
|
||
|
|
|
||
|
|
// this doesn't check that the bytes are in a random *order*
|
||
|
|
// but it's better than nothing.
|
||
|
|
|
||
|
|
var expected = 256 / 2;
|
||
|
|
var smean = Math.sqrt(mean);
|
||
|
|
|
||
|
|
// console.log doesn't work right on testling, *grumble grumble*
|
||
|
|
console.log(JSON.stringify([expected - smean, mean, expected + smean]));
|
||
|
|
t.ok(mean < expected + smean);
|
||
|
|
t.ok(mean > expected - smean);
|
||
|
|
|
||
|
|
t.end();
|
||
|
|
});
|
||
|
|
});
|