RE: [openpgpjs] How to get public key length from openpgp.key.readArmored

[Barry de Graaff]

Thanks Pawel!
@tuanta can you add this?

Date: Thu, 26 Feb 2015 13:44:27 +0100
From: pa...@pawelgorny.com
To: list@openpgpjs.org
Subject: Re: [openpgpjs] How to get public key length from      
openpgp.key.readArmored



var publicKey = openpgp.key.readArmored(data);

var publicKeyPacket = publicKey.keys[0].primaryKey;

if (publicKeyPacket != null) {
strength=getBitLength(publicKeyPacket));

}

getBitLength: function(publicKeyPacket) {
 var result = -1;

if (publicKeyPacket.mpi.length > 0) {
 result = (publicKeyPacket.mpi[0].byteLength() * 8);
 }

return result;
 }

 

W dniu 2015-02-26 13:04, Barry de Graaff napisał(a):



Hi Folks,
 
What is the way to get the public key length using openpgp.key.readArmored
 
I have this code:

      var publicKeys = openpgp.key.readArmored(pubkey);
      console.log(publicKeys);
//is a key object
 
 userid = publicKeys.keys[0].users[0].userId.userid;
 

How do I get the Public Key length (1024, 4096 etc)??
 
The answer may be somewhere in here:
https://github.com/openpgpjs/openpgpjs/blob/master/src/packet/public_key.js
 
/**
 * Returns bit size of key
 * @return {int} Number of bits
 */
PublicKey.prototype.getBitSize = function () {
  return this.mpi[0].byteLength() * 8;
};
 
Not sure how to invoke this though, 
 
 
What am I missing?
 
 
Thanks
 
 
 
 Barry
 



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