Support p12 file format natively

[erlichmen]

Since Google provides the private key natively in p12 format I think it will be best to support that format out of the box (including password) without the need to convert the file into PEM format.

[bsphere]

If you can extract the key from the PKCS#12 file, simply pass it as the key parameter to https://github.com/bsphere/node-gapitoken.

I tried unsuccessfully to extract the key with both https://github.com/digitalbazaar/forge and http://nodejs.org/api/crypto.html#crypto_crypto_createcredentials_details

[objectiveSee]

+1 not sure why this was closed.

[Mr0grog]

This worked for me with node-forge:

var forge = require("node-forge");
var p12Buffer = fs.readFileSync("thekey.p12");
var p12Base64 = p12Buffer.toString("base64");
var p12Der = forge.util.decode64(p12Base64);
var p12Asn1 = forge.asn1.fromDer(p12Der);
var p12 = forge.pkcs12.pkcs12FromAsn1(p12Asn1, 'notasecret');
var keyData = p12.getBags({friendlyName: 'privatekey'}).friendlyName[0].key;
var key = forge.pki.privateKeyToPem(keyData);