make logo look better

Reviewed-on: #4

backend/.env

@@ -1,18 +1,6 @@
-PORT=3001
-DB_HOST=nw.sgcode.cn
-DB_PORT=21434
-DB_USER=root
-DB_PASSWORD=root
-DB_NAME=opencoze
-PORT=3000
-DB_HOST=nw.sgcode.cn
-DB_PORT=21434
-DB_USER=root
-DB_PASSWORD=root
-DB_NAME=opencoze
-PORT=3000
 DB_HOST=nw.sgcode.cn
 DB_PORT=21434
 DB_USER=root
 DB_PASSWORD=root
 DB_NAME=opencoze
+COZE_HOST=http://localhost:8888

backend/.env.example

@@ -21,3 +21,9 @@ DB_NAME=opencoze
 DB_USER=root
 DB_PASSWORD=your_real_password_here
 DB_TABLE_USER=user
+
+# Coze SSO integration
+# Shared secret used to sign SSO JWTs (must match Coze backend SSO_SHARED_SECRET)
+SSO_SHARED_SECRET=change-this-sso-secret
+# Base URL of your Coze host (including scheme and port)
+COZE_HOST=http://localhost:8888

backend/auth-api.js

@@ -4,11 +4,13 @@ import cors from 'cors';
 import mysql from 'mysql2/promise';
 import bcrypt from 'bcryptjs';
 import argon2 from 'argon2';
+import jwt from 'jsonwebtoken';
 
 dotenv.config();
 
 const app = express();
 const port = 3010;
+const cozeHost = (process.env.COZE_HOST || 'http://localhost:8888').replace(/\/+$/, '');
 
 app.use(
   cors({
@@ -65,6 +67,7 @@ app.get('/api/health', async (_req, res) => {
 });
 
 app.post('/api/register', async (req, res) => {
+  let connection;
   try {
     const { email, password, confirmPassword } = req.body ?? {};
 
@@ -96,19 +99,64 @@ app.post('/api/register', async (req, res) => {
       return;
     }
 
-    const passwordHash = await bcrypt.hash(String(password), 10);
+    // New users are stored with Argon2id hashes.
+    const passwordHash = await argon2.hash(String(password), { type: argon2.argon2id });
     const uniqueName = trimmedEmail;
     const displayName = trimmedEmail.split('@')[0];
     const now = Date.now();
-    await pool.query(
+
+    const defaultIconUri = 'default_icon/user_default_icon.png';
+    const personalSpaceName = 'Personal Space';
+    const personalSpaceDescription = 'This is your personal space';
+
+    connection = await pool.getConnection();
+    await connection.beginTransaction();
+
+    await connection.query(
       'INSERT INTO `user` (name, unique_name, email, password, description, icon_uri, user_verified, locale, session_key, created_at, updated_at, deleted_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)',
-      [displayName, uniqueName, trimmedEmail, passwordHash, '', '', 0, 'zh-CN', '', now, now, null]
+      [displayName, uniqueName, trimmedEmail, passwordHash, '', defaultIconUri, 0, 'zh-CN', '', now, now, null]
     );
 
+    const [createdUserRows] = await connection.query('SELECT CAST(id AS CHAR) AS id FROM `user` WHERE email = ? LIMIT 1', [
+      trimmedEmail
+    ]);
+    const userId = createdUserRows[0]?.id;
+    if (!userId) {
+      throw new Error('Failed to resolve created user ID');
+    }
+
+    await connection.query(
+      'INSERT INTO `space` (owner_id, name, description, icon_uri, creator_id, created_at, updated_at, deleted_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
+      [userId, personalSpaceName, personalSpaceDescription, defaultIconUri, userId, now, now, null]
+    );
+
+    const [createdSpaceRows] = await connection.query(
+      'SELECT CAST(id AS CHAR) AS id FROM `space` WHERE owner_id = ? ORDER BY created_at DESC, id DESC LIMIT 1',
+      [userId]
+    );
+    const spaceId = createdSpaceRows[0]?.id;
+    if (!spaceId) {
+      throw new Error('Failed to resolve created space ID');
+    }
+
+    await connection.query(
+      'INSERT INTO `space_user` (space_id, user_id, role_type, created_at, updated_at) VALUES (?, ?, ?, ?, ?)',
+      [spaceId, userId, 1, now, now]
+    );
+
+    await connection.commit();
+
     res.status(201).json({ message: 'Registered successfully' });
   } catch (error) {
+    if (connection) {
+      await connection.rollback();
+    }
     console.error('Register failed:', error);
     res.status(500).json({ message: 'Register failed' });
+  } finally {
+    if (connection) {
+      connection.release();
+    }
   }
 });
 
@@ -138,6 +186,7 @@ app.post('/api/login', async (req, res) => {
     } else if (storedPassword.startsWith('$2')) {
       isPasswordValid = await bcrypt.compare(rawPassword, storedPassword);
     }
+
     if (!isPasswordValid) {
       res.status(401).json({ message: 'Invalid email or password' });
       return;
@@ -156,13 +205,85 @@ app.post('/api/login', async (req, res) => {
   }
 });
 
+app.get('/api/coze/space-url', async (req, res) => {
+  try {
+    const rawUser = String(req.query.user || req.query.email || '').trim().toLowerCase();
+    if (!rawUser) {
+      res.status(400).json({ message: 'user is required' });
+      return;
+    }
+
+    const [userRows] = await pool.query(
+      'SELECT CAST(id AS CHAR) AS id, email, unique_name, name FROM `user` WHERE email = ? OR unique_name = ? OR LOWER(name) = ? LIMIT 1',
+      [rawUser, rawUser, rawUser]
+    );
+    const user = userRows[0];
+    if (!user) {
+      res.status(404).json({ message: 'User not found' });
+      return;
+    }
+
+    const [spaceRows] = await pool.query(
+      'SELECT CAST(s.id AS CHAR) AS id FROM `space` s INNER JOIN `space_user` su ON su.space_id = s.id WHERE su.user_id = ? AND (s.deleted_at IS NULL OR s.deleted_at = 0) ORDER BY su.role_type ASC, su.id DESC LIMIT 1',
+      [user.id]
+    );
+    const space = spaceRows[0];
+    if (!space) {
+      res.status(404).json({ message: 'No space found for user' });
+      return;
+    }
+
+    const url = `${cozeHost}/space/${space.id}/develop`;
+    res.json({ url, spaceId: space.id, user: user.email || user.unique_name || user.name });
+  } catch (error) {
+    console.error('Resolve Coze space URL failed:', error);
+    res.status(500).json({ message: 'Failed to resolve Coze space URL' });
+  }
+});
+
+// Coze SSO: issue short-lived JWT and redirect to Coze SSO exchange endpoint
+app.get('/api/coze/sso-login', (req, res) => {
+  try {
+    const email = String(req.query.email || req.query.user || '').trim().toLowerCase();
+    if (!email) {
+      res.status(400).json({ message: 'email is required' });
+      return;
+    }
+
+    const secret = process.env.SSO_SHARED_SECRET;
+
+    if (!secret) {
+      res.status(500).json({ message: 'SSO is not configured on server (missing SSO_SHARED_SECRET)' });
+      return;
+    }
+
+    const token = jwt.sign(
+      { email },
+      secret,
+      { algorithm: 'HS256', expiresIn: 300 } // 5 minutes
+    );
+
+    const nextPath = encodeURIComponent('/space');
+    const redirectUrl = `${cozeHost}/api/passport/web/sso/exchange/?token=${encodeURIComponent(
+      token
+    )}&next=${nextPath}`;
+
+    res.redirect(302, redirectUrl);
+  } catch (error) {
+    console.error('Coze SSO login failed:', error);
+    res.status(500).json({ message: 'Coze SSO login failed' });
+  }
+});
+
 ensureUsersTable()
   .then(() => {
+    console.log('Database initialization completed.');
+  })
+  .catch((error) => {
+    console.error('Failed to initialize database (server will still start):', error);
+  })
+  .finally(() => {
     app.listen(port, () => {
       console.log(`Auth API running at http://localhost:${port}`);
     });
-  })
-  .catch((error) => {
-    console.error('Failed to initialize database:', error);
-    process.exit(1);
   });

backend/node_modules/.bin/semver

@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../semver/bin/semver.js" "$@"
+else 
+  exec node  "$basedir/../semver/bin/semver.js" "$@"
+fi

backend/node_modules/.bin/semver.cmd

@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\semver\bin\semver.js" %*

backend/node_modules/.bin/semver.ps1

@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../semver/bin/semver.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../semver/bin/semver.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../semver/bin/semver.js" $args
+  } else {
+    & "node$exe"  "$basedir/../semver/bin/semver.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret

backend/node_modules/buffer-equal-constant-time/.npmignore

@@ -0,0 +1,2 @@
+.*.sw[mnop]
+node_modules/

backend/node_modules/buffer-equal-constant-time/.travis.yml

@@ -0,0 +1,4 @@
+language: node_js
+node_js:
+- "0.11"
+- "0.10"

backend/node_modules/buffer-equal-constant-time/LICENSE.txt

@@ -0,0 +1,12 @@
+Copyright (c) 2013, GoInstant Inc., a salesforce.com company
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+* Neither the name of salesforce.com, nor GoInstant, nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

backend/node_modules/buffer-equal-constant-time/README.md

@@ -0,0 +1,50 @@
+# buffer-equal-constant-time
+
+Constant-time `Buffer` comparison for node.js.  Should work with browserify too.
+
+[![Build Status](https://travis-ci.org/goinstant/buffer-equal-constant-time.png?branch=master)](https://travis-ci.org/goinstant/buffer-equal-constant-time)
+
+```sh
+  npm install buffer-equal-constant-time
+```
+
+# Usage
+
+```js
+  var bufferEq = require('buffer-equal-constant-time');
+
+  var a = new Buffer('asdf');
+  var b = new Buffer('asdf');
+  if (bufferEq(a,b)) {
+    // the same!
+  } else {
+    // different in at least one byte!
+  }
+```
+
+If you'd like to install an `.equal()` method onto the node.js `Buffer` and
+`SlowBuffer` prototypes:
+
+```js
+  require('buffer-equal-constant-time').install();
+
+  var a = new Buffer('asdf');
+  var b = new Buffer('asdf');
+  if (a.equal(b)) {
+    // the same!
+  } else {
+    // different in at least one byte!
+  }
+```
+
+To get rid of the installed `.equal()` method, call `.restore()`:
+
+```js
+  require('buffer-equal-constant-time').restore();
+```
+
+# Legal
+
+© 2013 GoInstant Inc., a salesforce.com company
+
+Licensed under the BSD 3-clause license.

backend/node_modules/buffer-equal-constant-time/index.js

@@ -0,0 +1,41 @@
+/*jshint node:true */
+'use strict';
+var Buffer = require('buffer').Buffer; // browserify
+var SlowBuffer = require('buffer').SlowBuffer;
+
+module.exports = bufferEq;
+
+function bufferEq(a, b) {
+
+  // shortcutting on type is necessary for correctness
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    return false;
+  }
+
+  // buffer sizes should be well-known information, so despite this
+  // shortcutting, it doesn't leak any information about the *contents* of the
+  // buffers.
+  if (a.length !== b.length) {
+    return false;
+  }
+
+  var c = 0;
+  for (var i = 0; i < a.length; i++) {
+    /*jshint bitwise:false */
+    c |= a[i] ^ b[i]; // XOR
+  }
+  return c === 0;
+}
+
+bufferEq.install = function() {
+  Buffer.prototype.equal = SlowBuffer.prototype.equal = function equal(that) {
+    return bufferEq(this, that);
+  };
+};
+
+var origBufEqual = Buffer.prototype.equal;
+var origSlowBufEqual = SlowBuffer.prototype.equal;
+bufferEq.restore = function() {
+  Buffer.prototype.equal = origBufEqual;
+  SlowBuffer.prototype.equal = origSlowBufEqual;
+};

backend/node_modules/buffer-equal-constant-time/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "buffer-equal-constant-time",
+  "version": "1.0.1",
+  "description": "Constant-time comparison of Buffers",
+  "main": "index.js",
+  "scripts": {
+    "test": "mocha test.js"
+  },
+  "repository": "git@github.com:goinstant/buffer-equal-constant-time.git",
+  "keywords": [
+    "buffer",
+    "equal",
+    "constant-time",
+    "crypto"
+  ],
+  "author": "GoInstant Inc., a salesforce.com company",
+  "license": "BSD-3-Clause",
+  "devDependencies": {
+    "mocha": "~1.15.1"
+  }
+}

backend/node_modules/buffer-equal-constant-time/test.js

@@ -0,0 +1,42 @@
+/*jshint node:true */
+'use strict';
+
+var bufferEq = require('./index');
+var assert = require('assert');
+
+describe('buffer-equal-constant-time', function() {
+  var a = new Buffer('asdfasdf123456');
+  var b = new Buffer('asdfasdf123456');
+  var c = new Buffer('asdfasdf');
+
+  describe('bufferEq', function() {
+    it('says a == b', function() {
+      assert.strictEqual(bufferEq(a, b), true);
+    });
+
+    it('says a != c', function() {
+      assert.strictEqual(bufferEq(a, c), false);
+    });
+  });
+
+  describe('install/restore', function() {
+    before(function() {
+      bufferEq.install();
+    });
+    after(function() {
+      bufferEq.restore();
+    });
+
+    it('installed an .equal method', function() {
+      var SlowBuffer = require('buffer').SlowBuffer;
+      assert.ok(Buffer.prototype.equal);
+      assert.ok(SlowBuffer.prototype.equal);
+    });
+
+    it('infected existing Buffers', function() {
+      assert.strictEqual(a.equal(b), true);
+      assert.strictEqual(a.equal(c), false);
+    });
+  });
+
+});

backend/node_modules/ecdsa-sig-formatter/CODEOWNERS

@@ -0,0 +1 @@
+* @omsmith

backend/node_modules/ecdsa-sig-formatter/LICENSE

@@ -0,0 +1,201 @@
+Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
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+
+      "Object" form shall mean any form resulting from mechanical
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "{}"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2015 D2L Corporation
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

backend/node_modules/ecdsa-sig-formatter/README.md

@@ -0,0 +1,65 @@
+# ecdsa-sig-formatter
+
+[![Build Status](https://travis-ci.org/Brightspace/node-ecdsa-sig-formatter.svg?branch=master)](https://travis-ci.org/Brightspace/node-ecdsa-sig-formatter) [![Coverage Status](https://coveralls.io/repos/Brightspace/node-ecdsa-sig-formatter/badge.svg)](https://coveralls.io/r/Brightspace/node-ecdsa-sig-formatter)
+
+Translate between JOSE and ASN.1/DER encodings for ECDSA signatures
+
+## Install
+```sh
+npm install ecdsa-sig-formatter --save
+```
+
+## Usage
+```js
+var format = require('ecdsa-sig-formatter');
+
+var derSignature = '..'; // asn.1/DER encoded ecdsa signature
+
+var joseSignature = format.derToJose(derSignature);
+
+```
+
+### API
+
+---
+
+#### `.derToJose(Buffer|String signature, String alg)` -> `String`
+
+Convert the ASN.1/DER encoded signature to a JOSE-style concatenated signature.
+Returns a _base64 url_ encoded `String`.
+
+* If _signature_ is a `String`, it should be _base64_ encoded
+* _alg_ must be one of _ES256_, _ES384_ or _ES512_
+
+---
+
+#### `.joseToDer(Buffer|String signature, String alg)` -> `Buffer`
+
+Convert the JOSE-style concatenated signature to an ASN.1/DER encoded
+signature. Returns a `Buffer`
+
+* If _signature_ is a `String`, it should be _base64 url_ encoded
+* _alg_ must be one of _ES256_, _ES384_ or _ES512_
+
+## Contributing
+
+1. **Fork** the repository. Committing directly against this repository is
+   highly discouraged.
+
+2. Make your modifications in a branch, updating and writing new unit tests
+   as necessary in the `spec` directory.
+
+3. Ensure that all tests pass with `npm test`
+
+4. `rebase` your changes against master. *Do not merge*.
+
+5. Submit a pull request to this repository. Wait for tests to run and someone
+   to chime in.
+
+### Code Style
+
+This repository is configured with [EditorConfig][EditorConfig] and
+[ESLint][ESLint] rules.
+
+[EditorConfig]: http://editorconfig.org/
+[ESLint]: http://eslint.org

backend/node_modules/ecdsa-sig-formatter/package.json

@@ -0,0 +1,46 @@
+{
+  "name": "ecdsa-sig-formatter",
+  "version": "1.0.11",
+  "description": "Translate ECDSA signatures between ASN.1/DER and JOSE-style concatenation",
+  "main": "src/ecdsa-sig-formatter.js",
+  "scripts": {
+    "check-style": "eslint .",
+    "pretest": "npm run check-style",
+    "test": "istanbul cover --root src _mocha -- spec",
+    "report-cov": "cat ./coverage/lcov.info | coveralls"
+  },
+  "typings": "./src/ecdsa-sig-formatter.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/Brightspace/node-ecdsa-sig-formatter.git"
+  },
+  "keywords": [
+    "ecdsa",
+    "der",
+    "asn.1",
+    "jwt",
+    "jwa",
+    "jsonwebtoken",
+    "jose"
+  ],
+  "author": "D2L Corporation",
+  "license": "Apache-2.0",
+  "bugs": {
+    "url": "https://github.com/Brightspace/node-ecdsa-sig-formatter/issues"
+  },
+  "homepage": "https://github.com/Brightspace/node-ecdsa-sig-formatter#readme",
+  "dependencies": {
+    "safe-buffer": "^5.0.1"
+  },
+  "devDependencies": {
+    "bench": "^0.3.6",
+    "chai": "^3.5.0",
+    "coveralls": "^2.11.9",
+    "eslint": "^2.12.0",
+    "eslint-config-brightspace": "^0.2.1",
+    "istanbul": "^0.4.3",
+    "jwk-to-pem": "^1.2.5",
+    "mocha": "^2.5.3",
+    "native-crypto": "^1.7.0"
+  }
+}

backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.d.ts

@@ -0,0 +1,17 @@
+/// <reference types="node" />
+
+declare module "ecdsa-sig-formatter" {
+	/**
+	 * Convert the ASN.1/DER encoded signature to a JOSE-style concatenated signature. Returns a base64 url encoded String.
+	 *    If signature is a String, it should be base64 encoded
+	 *    alg must be one of ES256, ES384 or ES512
+	 */
+	export function derToJose(signature: Buffer | string, alg: string): string;
+
+	/**
+	 * Convert the JOSE-style concatenated signature to an ASN.1/DER encoded signature. Returns a Buffer
+	 *     If signature is a String, it should be base64 url encoded
+	 *     alg must be one of ES256, ES384 or ES512
+	 */
+	export function joseToDer(signature: Buffer | string, alg: string): Buffer
+}

backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.js

@@ -0,0 +1,187 @@
+'use strict';
+
+var Buffer = require('safe-buffer').Buffer;
+
+var getParamBytesForAlg = require('./param-bytes-for-alg');
+
+var MAX_OCTET = 0x80,
+	CLASS_UNIVERSAL = 0,
+	PRIMITIVE_BIT = 0x20,
+	TAG_SEQ = 0x10,
+	TAG_INT = 0x02,
+	ENCODED_TAG_SEQ = (TAG_SEQ | PRIMITIVE_BIT) | (CLASS_UNIVERSAL << 6),
+	ENCODED_TAG_INT = TAG_INT | (CLASS_UNIVERSAL << 6);
+
+function base64Url(base64) {
+	return base64
+		.replace(/=/g, '')
+		.replace(/\+/g, '-')
+		.replace(/\//g, '_');
+}
+
+function signatureAsBuffer(signature) {
+	if (Buffer.isBuffer(signature)) {
+		return signature;
+	} else if ('string' === typeof signature) {
+		return Buffer.from(signature, 'base64');
+	}
+
+	throw new TypeError('ECDSA signature must be a Base64 string or a Buffer');
+}
+
+function derToJose(signature, alg) {
+	signature = signatureAsBuffer(signature);
+	var paramBytes = getParamBytesForAlg(alg);
+
+	// the DER encoded param should at most be the param size, plus a padding
+	// zero, since due to being a signed integer
+	var maxEncodedParamLength = paramBytes + 1;
+
+	var inputLength = signature.length;
+
+	var offset = 0;
+	if (signature[offset++] !== ENCODED_TAG_SEQ) {
+		throw new Error('Could not find expected "seq"');
+	}
+
+	var seqLength = signature[offset++];
+	if (seqLength === (MAX_OCTET | 1)) {
+		seqLength = signature[offset++];
+	}
+
+	if (inputLength - offset < seqLength) {
+		throw new Error('"seq" specified length of "' + seqLength + '", only "' + (inputLength - offset) + '" remaining');
+	}
+
+	if (signature[offset++] !== ENCODED_TAG_INT) {
+		throw new Error('Could not find expected "int" for "r"');
+	}
+
+	var rLength = signature[offset++];
+
+	if (inputLength - offset - 2 < rLength) {
+		throw new Error('"r" specified length of "' + rLength + '", only "' + (inputLength - offset - 2) + '" available');
+	}
+
+	if (maxEncodedParamLength < rLength) {
+		throw new Error('"r" specified length of "' + rLength + '", max of "' + maxEncodedParamLength + '" is acceptable');
+	}
+
+	var rOffset = offset;
+	offset += rLength;
+
+	if (signature[offset++] !== ENCODED_TAG_INT) {
+		throw new Error('Could not find expected "int" for "s"');
+	}
+
+	var sLength = signature[offset++];
+
+	if (inputLength - offset !== sLength) {
+		throw new Error('"s" specified length of "' + sLength + '", expected "' + (inputLength - offset) + '"');
+	}
+
+	if (maxEncodedParamLength < sLength) {
+		throw new Error('"s" specified length of "' + sLength + '", max of "' + maxEncodedParamLength + '" is acceptable');
+	}
+
+	var sOffset = offset;
+	offset += sLength;
+
+	if (offset !== inputLength) {
+		throw new Error('Expected to consume entire buffer, but "' + (inputLength - offset) + '" bytes remain');
+	}
+
+	var rPadding = paramBytes - rLength,
+		sPadding = paramBytes - sLength;
+
+	var dst = Buffer.allocUnsafe(rPadding + rLength + sPadding + sLength);
+
+	for (offset = 0; offset < rPadding; ++offset) {
+		dst[offset] = 0;
+	}
+	signature.copy(dst, offset, rOffset + Math.max(-rPadding, 0), rOffset + rLength);
+
+	offset = paramBytes;
+
+	for (var o = offset; offset < o + sPadding; ++offset) {
+		dst[offset] = 0;
+	}
+	signature.copy(dst, offset, sOffset + Math.max(-sPadding, 0), sOffset + sLength);
+
+	dst = dst.toString('base64');
+	dst = base64Url(dst);
+
+	return dst;
+}
+
+function countPadding(buf, start, stop) {
+	var padding = 0;
+	while (start + padding < stop && buf[start + padding] === 0) {
+		++padding;
+	}
+
+	var needsSign = buf[start + padding] >= MAX_OCTET;
+	if (needsSign) {
+		--padding;
+	}
+
+	return padding;
+}
+
+function joseToDer(signature, alg) {
+	signature = signatureAsBuffer(signature);
+	var paramBytes = getParamBytesForAlg(alg);
+
+	var signatureBytes = signature.length;
+	if (signatureBytes !== paramBytes * 2) {
+		throw new TypeError('"' + alg + '" signatures must be "' + paramBytes * 2 + '" bytes, saw "' + signatureBytes + '"');
+	}
+
+	var rPadding = countPadding(signature, 0, paramBytes);
+	var sPadding = countPadding(signature, paramBytes, signature.length);
+	var rLength = paramBytes - rPadding;
+	var sLength = paramBytes - sPadding;
+
+	var rsBytes = 1 + 1 + rLength + 1 + 1 + sLength;
+
+	var shortLength = rsBytes < MAX_OCTET;
+
+	var dst = Buffer.allocUnsafe((shortLength ? 2 : 3) + rsBytes);
+
+	var offset = 0;
+	dst[offset++] = ENCODED_TAG_SEQ;
+	if (shortLength) {
+		// Bit 8 has value "0"
+		// bits 7-1 give the length.
+		dst[offset++] = rsBytes;
+	} else {
+		// Bit 8 of first octet has value "1"
+		// bits 7-1 give the number of additional length octets.
+		dst[offset++] = MAX_OCTET	| 1;
+		// length, base 256
+		dst[offset++] = rsBytes & 0xff;
+	}
+	dst[offset++] = ENCODED_TAG_INT;
+	dst[offset++] = rLength;
+	if (rPadding < 0) {
+		dst[offset++] = 0;
+		offset += signature.copy(dst, offset, 0, paramBytes);
+	} else {
+		offset += signature.copy(dst, offset, rPadding, paramBytes);
+	}
+	dst[offset++] = ENCODED_TAG_INT;
+	dst[offset++] = sLength;
+	if (sPadding < 0) {
+		dst[offset++] = 0;
+		signature.copy(dst, offset, paramBytes);
+	} else {
+		signature.copy(dst, offset, paramBytes + sPadding);
+	}
+
+	return dst;
+}
+
+module.exports = {
+	derToJose: derToJose,
+	joseToDer: joseToDer
+};

backend/node_modules/ecdsa-sig-formatter/src/param-bytes-for-alg.js

@@ -0,0 +1,23 @@
+'use strict';
+
+function getParamSize(keySize) {
+	var result = ((keySize / 8) | 0) + (keySize % 8 === 0 ? 0 : 1);
+	return result;
+}
+
+var paramBytesForAlg = {
+	ES256: getParamSize(256),
+	ES384: getParamSize(384),
+	ES512: getParamSize(521)
+};
+
+function getParamBytesForAlg(alg) {
+	var paramBytes = paramBytesForAlg[alg];
+	if (paramBytes) {
+		return paramBytes;
+	}
+
+	throw new Error('Unknown algorithm "' + alg + '"');
+}
+
+module.exports = getParamBytesForAlg;