问题
In Apple's Doc, generateIdentityVerificationSignatureWithCompletionHandler, you are to concatenate into a data buffer 4 parameters, one of which being "The timestamp parameter in Big-Endian UInt-64 format", and then generate a SHA-1 hash value for verification.
Has anyone accomplished this successfully in Node.js/Javascript? The main issue I am having is that Javascript/Node.js does not seem to have any support 64-bit unsigned big endian integers; it seems to max out at 32-bit, unsigned.
PS: I know there the following related questions, but they do not tackle this particular javascript issue.
- How to authenticate the GKLocalPlayer on my 'third party server'?: the solutions are for ruby, python, and obj-c; all having native support for producing the 64-bit BE hex for the timestamp.
- How to authenticate Game Center User from 3rd party node.js
server: the code relies on the client sending the server a
timestamp already in the form of a hex string (see
json.hexTimestamp, around ln 22)
Is it even possible to reliably create the hex representation of a 64-bit unsigned big endian ... in javascript? I'm considering executing ruby/python via Node.js as a possible workaround.
回答1:
The easier way is to use ref
var ref = require('ref');
var buf = ref.alloc('uint64');
ref.writeUInt64BE(buf, 0, '1401893400733');
after that you could use the buffer to update the verifier.
来源：https://stackoverflow.com/questions/23223266/how-to-authenticate-the-gklocalplayer-on-my-node-js-server