implemented crypto polyfills for ms edge

test/frontend/index.js

@@ -7,7 +7,7 @@ function kv(f) {
 
 module.exports = function() {
   const files = fs.readdirSync(path.join(__dirname, 'tests'));
-  const code = files.map(kv).join(';\n');
+  const code = "require('fast-text-encoding');\n" + files.map(kv).join(';\n');
   return {
     code,
     dependencies: files.map(f => require.resolve('./tests/' + f)),

test/frontend/routes.js

@@ -29,6 +29,7 @@ module.exports = function(app) {
           })
           </script>
           <script src="/jsconfig.js"></script>
+          <script src="${assets.get('cryptofill.js')}"></script>
           <script src="${assets.get('runtime.js')}"></script>
           <script src="${assets.get('vendor.js')}"></script>
           <script src="${assets.get('tests.js')}"></script>

test/frontend/tests/crypto-tests.js

@@ -0,0 +1,122 @@
+import assert from 'assert';
+import { arrayToB64, b64ToArray } from '../../../app/utils';
+
+describe('webcrypto', function() {
+  it('can do it', async function() {
+    const encoder = new TextEncoder();
+    const x = b64ToArray('SPIfAlwbnncIFw3hEHYihw');
+    const a = await crypto.subtle.importKey('raw', x, 'PBKDF2', false, [
+      'deriveKey'
+    ]);
+
+    const ad = await crypto.subtle.deriveKey(
+      {
+        name: 'PBKDF2',
+        salt: encoder.encode('metadata'),
+        iterations: 100,
+        hash: 'SHA-256'
+      },
+      a,
+      {
+        name: 'AES-GCM',
+        length: 128
+      },
+      false,
+      ['encrypt', 'decrypt']
+    );
+
+    const ae = await crypto.subtle.encrypt(
+      {
+        name: 'AES-GCM',
+        iv: new Uint8Array(12),
+        tagLength: 128
+      },
+      ad,
+      encoder.encode('hello world!')
+    );
+
+    assert.equal(
+      arrayToB64(new Uint8Array(ae)),
+      'UXQQ4yVf55TRk9AZtz5QCwFofRvh-HdWJyxSCQ'
+    );
+
+    const ah = await crypto.subtle.deriveKey(
+      {
+        name: 'PBKDF2',
+        salt: encoder.encode('authentication'),
+        iterations: 100,
+        hash: 'SHA-256'
+      },
+      a,
+      {
+        name: 'HMAC',
+        hash: { name: 'SHA-256' }
+      },
+      true,
+      ['sign']
+    );
+    const ahx = await crypto.subtle.exportKey('raw', ah);
+    assert.equal(
+      arrayToB64(new Uint8Array(ahx)),
+      'wxXDmHgmMgrcDVD8zbDLRl2yNa8jSAQgsaeIBZ4vueygpxzaTK6ZE_6X-XHvllBly6pSuFNbSxcve0ZHhVdcEA'
+    );
+    // const jwk = await crypto.subtle.exportKey('jwk', ah)
+    // console.error(jwk)
+    const as = await crypto.subtle.sign(
+      {
+        name: 'HMAC'
+      },
+      ah,
+      encoder.encode('test')
+    );
+    assert.equal(
+      arrayToB64(new Uint8Array(as)),
+      'AOi4HcoCJxQ4nUYxlmHB1rlcxQBn-zVjrSHz-VW7S-I'
+    );
+
+    const b = await crypto.subtle.importKey('raw', x, 'HKDF', false, [
+      'deriveKey'
+    ]);
+    const bd = await crypto.subtle.deriveKey(
+      {
+        name: 'HKDF',
+        salt: new Uint8Array(),
+        info: encoder.encode('encryption'),
+        hash: 'SHA-256'
+      },
+      b,
+      {
+        name: 'AES-GCM',
+        length: 128
+      },
+      true,
+      ['encrypt', 'decrypt']
+    );
+    const bdx = await crypto.subtle.exportKey('raw', bd);
+
+    assert.equal(arrayToB64(new Uint8Array(bdx)), 'g7okjWWO9yueDz16-owShQ');
+
+    const bh = await crypto.subtle.deriveKey(
+      {
+        name: 'HKDF',
+        salt: new Uint8Array(),
+        info: encoder.encode('authentication'),
+        hash: 'SHA-256'
+      },
+      b,
+      {
+        name: 'HMAC',
+        hash: { name: 'SHA-256' }
+      },
+      true,
+      ['sign']
+    );
+
+    const bhx = await crypto.subtle.exportKey('raw', bh);
+
+    assert.equal(
+      arrayToB64(new Uint8Array(bhx)),
+      'TQOGtmQ8-ZfnWu6Iq-U1IAVBVREFuI17xqsW1shiC8eMCa-a5qeYTvoX3-5kCoCha8R59ycnPDnTz75clLBmbQ'
+    );
+  });
+});