61 lines
1.7 KiB
JavaScript
Vendored
61 lines
1.7 KiB
JavaScript
Vendored
var test = require('tape')
|
|
var crypto = require('../')
|
|
|
|
var randomBytesFunctions = {
|
|
randomBytes: require('randombytes'),
|
|
pseudoRandomBytes: crypto.pseudoRandomBytes
|
|
}
|
|
|
|
for (var randomBytesName in randomBytesFunctions) {
|
|
// Both randomBytes and pseudoRandomBytes should provide the same interface
|
|
var randomBytes = randomBytesFunctions[randomBytesName]
|
|
|
|
test('get error message', function (t) {
|
|
try {
|
|
var b = randomBytes(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(randomBytes(10).length, 10)
|
|
t.ok(Buffer.isBuffer(randomBytes(10)))
|
|
randomBytes(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 b = randomBytes(L)
|
|
|
|
var mean = [].reduce.call(b, 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/dominictarr/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()
|
|
})
|
|
}
|