在流星中使用Crypto.js

Question

I am trying to include some crypto.js libraries in a meteor js app (meteor version 0.6.4.1).

• http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/hmac-sha256.js
• http://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/enc-base64-min.js

When I copy and paste the contents into the server/main.js file it works fine, but this makes it very un-readable.

When I put the libraries in separate files in the server directory (I also tried placing them in the lib directory) I get the error ReferenceError: CryptoJS is not defined .

gist of server/main.js:

Meteor.methods({
    encrypt:function(bundleID){
        return CryptoJS.HmacSHA256(string, 'something');
    }
});

I also tried changing the first line of the hmac-sha256.js file from

var CryptoJS=CryptoJS||function(h,s){...

to:

CryptoJS=CryptoJS||function(h,s){...

to make it global, but this also did not work. How do I include this library properly?

Answer 1

In your application dir create folder 'packages/cryptojs' and put there files:

• hmac-sha256.js
• enc-base64-min.js
• package.js

packages / cryptojs / package.js :

Package.describe({
  summary: "CryptoJS"
});

Package.on_use(function (api, where) {
  api.add_files(['hmac-sha256.js'], ['client','server']);
  api.add_files(['enc-base64-min.js'], ['client','server']);
});

You need to modify hmac-sha256.js by changing beginning of line 7 from:

var CryptoJS=CryptoJS||function(h,s){

to:

CryptoJS=function(h,s){

After that, you can use it:

var hash = CryptoJS.HmacSHA256("Message", "secret");
var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);    
console.log(hashInBase64)

Example source

Answer 2

I followed as parhelium's guide, but still not work, then I found new way to fix this issue: Just replace line 7 in hmac-sha512.js to this one to globalize CryptoJS object:

this.CryptoJS=this.CryptoJS

Fix the same for other cryptojs. To use with Base64, you must make sure the base64.js is loaded after other libraries.

Answer 3

The reason this is happening is due to the variable scoping in meteor. Try putting the cryptojs library files in /server/compatibility . This way the cryptojs library can be accessed in other files.

You could also get it working without putting it in /compatibility by removing the var used in the cryptojs source files. The thing is if you do this its harder to keep the files up to date.