test loading publisher id from concat, validating messages with it

test/resources/fixtures/concat-message-signature.js

@@ -0,0 +1,6 @@
+module.exports = {
+  publisherIdB58: '4XTTM4JKrrBeAK6qXmo8FoKmT5RkfjeXfZrnWjJNw9fKvPnEs',
+  privateKeyB58: 'K3TgUMffighKb23qdfq8oyJM4ByiG3nMgKMHNQeTFEKtfDJzGaTeEzJzp1BUmPYikTtzrgyiEg8DGSfWXemtWh5APs2a8K8hpfHYwhmvxh35YdGrrYHgMEpxFxCEEiaRkN7oDt7q',
+  message: Buffer.from('This message was signed with a key generated by concat', 'utf-8'),
+  signature: Buffer.from('Id02py5k9yGJBYQ6/W1qOThAdF9Y5LQySQGbCQdV+pYou+xNeRG26sIJQCZ3B/9SQ/CpJfZjwr+QjwydNWg6Ag==', 'base64')
+}

test/resources/publisher_ids/concat/4XTTM4JKrrBeAK6qXmo8FoKmT5RkfjeXfZrnWjJNw9fKvPnEs.privateKey

@@ -0,0 +1 @@
+
`~K'��^�h��I�$
p�ˎ���M.�%2��+=.�l^�$s�V#����������;No�P�U�.�l^�$s�V#����������;No�P�U�

test/signature_test.js

@@ -3,11 +3,17 @@
 
 const assert = require('assert')
 const { before, describe, it } = require('mocha')
+const path = require('path')
 
-const { PublisherId } = require('../src/peer/identity')
+const { PublisherId, PrivateSigningKey } = require('../src/peer/identity')
 const { makeSimpleStatement } = require('../src/metadata/statement')
 const { signStatement, verifyStatement } = require('../src/metadata/signatures')
 
+const CONCAT_PUBLISHER_ID_PUB58 = '4XTTM4JKrrBeAK6qXmo8FoKmT5RkfjeXfZrnWjJNw9fKvPnEs'
+const CONCAT_PUBLISHER_ID_PATH = path.join(__dirname, 'resources', 'publisher_ids', 'concat',
+  `${CONCAT_PUBLISHER_ID_PUB58}.privateKey`)
+const CONCAT_MESSAGE_FIXTURES = require('./resources/fixtures/concat-message-signature')
+
 describe('Signature verification', () => {
   let publisherId
 
@@ -69,4 +75,29 @@ describe('Signature verification', () => {
         assert(!valid, 'incorrectly validated an altered statement')
       })
   })
+
+  it('loads a publisher id from a file generated by concat', () => {
+    return PublisherId.load(CONCAT_PUBLISHER_ID_PATH)
+      .then(id => {
+        assert.notEqual(id, null, 'publisher id did not load')
+        assert.equal(CONCAT_PUBLISHER_ID_PUB58, id.privateKey.publicKey.toB58String(),
+        'base58-encoded public key does not match fixture')
+      })
+  })
+
+  it('generates the same signature as concat using the same publisher id', () => {
+    let privateKey
+    return PrivateSigningKey.fromB58String(CONCAT_MESSAGE_FIXTURES.privateKeyB58)
+      .then(key => {
+        privateKey = key
+        assert.equal(privateKey.publicKey.toB58String(), CONCAT_MESSAGE_FIXTURES.publisherIdB58,
+        'base58-encoded public key does not match fixture')
+
+        return privateKey.sign(CONCAT_MESSAGE_FIXTURES.message)
+      })
+      .then(sig => {
+        assert.deepEqual(sig, CONCAT_MESSAGE_FIXTURES.signature,
+        'signatures did not match')
+      })
+  })
 })