From eb9fd652d270ec9c5195531b5fc406f43bb5c88b Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Fri, 18 Jul 2014 00:16:31 -0700
Subject: [PATCH] paypro: potentially stop using jsrsasign in node.

---
 lib/PayPro.js | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/lib/PayPro.js b/lib/PayPro.js
index 3aa0079..13f79c6 100644
--- a/lib/PayPro.js
+++ b/lib/PayPro.js
@@ -220,6 +220,7 @@ PayPro.prototype.sign = function(key) {
     var trusted = [].concat(pki_data).every(function(cert) {
       var der = cert.toString('hex');
       var pem = KJUR.asn1.ASN1Util.getPEMStringFromHex(der, 'CERTIFICATE');
+      // var pem = DERtoPEM(der, 'CERTIFICATE');
       return !!RootCerts[pem.replace(/\s+/g, '')];
     });
 
@@ -264,6 +265,7 @@ PayPro.prototype.verify = function() {
     return [].concat(pki_data).every(function(cert) {
       var der = cert.toString('hex');
       var pem = KJUR.asn1.ASN1Util.getPEMStringFromHex(der, 'CERTIFICATE');
+      // var pem = DERtoPEM(der, 'CERTIFICATE');
 
       if (!RootCerts[pem.replace(/\s+/g, '')]) {
         // throw new Error('Unstrusted certificate.');
@@ -293,4 +295,58 @@ PayPro.prototype.sinVerify = function() {
   return Message.verifyWithPubKey(pubkey, buf, sig);
 };
 
+// Helpers
+
+function PEMtoDER(pem) {
+  pem = pem.replace(/^-----END [^-]+-----$/gmi/, '');
+  var parts = pem.split(/-----BEGIN [^-]+-----/);
+  return parts.map(function(part) {
+    part = part.replace(/\s+/g, '');
+    return new Buffer(part, 'base64');
+  });
+}
+
+function PEMtoDERParam(pem, param) {
+  var start = new RegExp('(?=-----BEGIN ' + param + '-----)', 'i');
+  var end = new RegExp('^-----END ' + param + '-----$', 'gmi');
+  pem = pem.replace(end, '');
+  var parts = pem.split(start);
+  return parts.map(function(part) {
+    part = part.replace(/\s+/g, '');
+    var type = /-----BEGIN ([^-]+)-----/.exec(part)[1];
+    part = part.replace(/-----BEGIN ([^-]+)-----/g, '');
+    if (type !== param) return;
+    return new Buffer(part, 'base64');
+  }).filter(Boolean);
+}
+
+function wrapText(text, cols) {
+  var j = 0;
+  var part = '';
+  var parts = [];
+  for (var i = 0; i < text.length; i++) {
+    if (j === cols) {
+      parts.push(part);
+      j = 0;
+      part = ''
+      continue;
+    }
+    part += text[i];
+    j++;
+  }
+  var total = parts.join('').length;
+  if (total < text.length) {
+    parts.push(text.slice(-(text.length - total)));
+  }
+  return parts.join('\n');
+}
+
+function DERtoPEM(der, type) {
+  var type = type || 'UNKNOWN';
+  return ''
+    + '-----BEGIN ' + type + '-----'
+    + wrapText(der.toString('base64'), 64)
+    + '-----END ' + type + '-----';
+}
+
 module.exports = PayPro;