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'use strict'
const { test } = require('tap')
const sinon = require('sinon')
const crypto = require('crypto')
const { Signer, sign, unsign } = require('../signer')
test('default', t => {
t.plan(5)
const secret = 'my-secret'
const signer = Signer(secret)
t.test('signer.sign should throw if there is no value provided', (t) => {
t.plan(1)
t.throws(() => signer.sign(undefined), 'Cookie value must be provided as a string.')
})
t.test('signer.sign', (t) => {
t.plan(2)
const input = 'some-value'
const result = signer.sign(input)
t.equal(result, sign(input, secret))
t.throws(() => sign(undefined), 'Cookie value must be provided as a string.')
})
t.test('sign', (t) => {
t.plan(3)
const input = 'some-value'
const result = signer.sign(input)
t.equal(result, sign(input, secret))
t.equal(result, sign(input, [secret]))
t.throws(() => sign(undefined), 'Cookie value must be provided as a string.')
})
t.test('signer.unsign', (t) => {
t.plan(4)
const input = signer.sign('some-value', secret)
const result = signer.unsign(input)
t.equal(result.valid, true)
t.equal(result.renew, false)
t.equal(result.value, 'some-value')
t.throws(() => signer.unsign(undefined), 'Signed cookie string must be provided.')
})
t.test('unsign', (t) => {
t.plan(6)
const input = sign('some-value', secret)
const result = unsign(input, secret)
t.equal(result.valid, true)
t.equal(result.renew, false)
t.equal(result.value, 'some-value')
t.same(result, unsign(input, [secret]))
t.throws(() => unsign(undefined), 'Secret key must be a string.')
t.throws(() => unsign(undefined, secret), 'Signed cookie string must be provided.')
})
})
test('key rotation', (t) => {
t.plan(3)
const secret1 = 'my-secret-1'
const secret2 = 'my-secret-2'
const secret3 = 'my-secret-3'
const signer = Signer([secret1, secret2, secret3])
const signSpy = sinon.spy(crypto, 'createHmac')
t.beforeEach(() => {
signSpy.resetHistory()
})
t.test('signer.sign always signs using first key', (t) => {
t.plan(1)
const input = 'some-value'
const result = signer.sign(input)
t.equal(result, sign(input, secret1))
})
t.test('signer.unsign tries to decode using all keys till it finds', (t) => {
t.plan(4)
const input = sign('some-value', secret2)
signSpy.resetHistory()
const result = signer.unsign(input)
t.equal(result.valid, true)
t.equal(result.renew, true)
t.equal(result.value, 'some-value')
t.equal(signSpy.callCount, 2) // should have returned early when the right key was found
})
t.test('signer.unsign failure response', (t) => {
t.plan(4)
const input = sign('some-value', 'invalid-secret')
signSpy.resetHistory()
const result = signer.unsign(input)
t.equal(result.valid, false)
t.equal(result.renew, false)
t.equal(result.value, null)
t.equal(signSpy.callCount, 3) // should have tried all 3
})
})
test('Signer', t => {
t.plan(2)
t.test('Signer needs a string as secret', (t) => {
t.plan(4)
t.throws(() => Signer(1), 'Secret key must be a string.')
t.throws(() => Signer(undefined), 'Secret key must be a string.')
t.doesNotThrow(() => Signer('secret'))
t.doesNotThrow(() => Signer(['secret']))
})
t.test('Signer handles algorithm properly', (t) => {
t.plan(3)
t.throws(() => Signer('secret', 'invalid'), 'Algorithm invalid not supported.')
t.doesNotThrow(() => Signer('secret', 'sha512'))
t.doesNotThrow(() => Signer('secret', 'sha256'))
})
})