add new getCertificateInfo() function

lib/openssl.js

@@ -4,17 +4,63 @@
 var spawn = require('child_process').spawn;
 
 module.exports = {
-  checkCertificateExpiration: function (cert, cb) {
-  	var openssl = spawn('openssl', ['x509', '-noout', '-enddate']);
+  getCertificateInfo: function (cert, cb) {
+    var infoObject = {},
+        issuerElements = [],
+        subjectElements = [],
+        err;
+
+  	var openssl = spawn('openssl', ['x509', '-noout', '-issuer', '-subject', '-dates']);
   	openssl.stdout.on('data', function (out) {
-  		var data = out.toString().trim();
-  		var certExpiry, err;
-  		try {
-  			certExpiry = new Date(data.split('=')[1]);
-  		} catch (_er) {
-  			err = _er;
-  		}
-  		cb(err, certExpiry);
+      var data = out.toString();
+
+      // Put each line into an array
+      var lineArray = data.split('\n');
+      // Filter out empty ones
+      lineArray = lineArray.filter(function(n){ return n !== undefined && n !== '' });
+
+      // Check if output is exact four lines
+      if (lineArray.length !== 4) {
+        err = new Error('Couldn\'t read certificate');
+      }
+
+      /* Construct infoObject */
+
+      // Certificate
+      infoObject.certificate = cert;
+
+      // Issuer
+      infoObject.issuer = {};
+      // Split by "/" prefix
+      issuerElements = lineArray[0].split('/');
+      // ... and get rid of first array element
+      issuerElements.shift();
+      // For each elements
+      for (var iI = 0; iI < issuerElements.length; iI++) {
+        // Split keys and values by "=" separator
+        var issuerKeyValue = issuerElements[iI].split('=');
+        infoObject.issuer[issuerKeyValue[0]] = issuerKeyValue[1];
+      }
+
+      // Subject
+      infoObject.subject = {};
+      // Split by "/" prefix
+      subjectElements = lineArray[1].split('/');
+      // ... and get rid of first array element
+      subjectElements.shift();
+      // For each elements
+      for (var iS = 0; iS < subjectElements.length; iS++) {
+        // Split keys and values by "=" separator
+        var subjectKeyValue = subjectElements[iS].split('=');
+        infoObject.subject[subjectKeyValue[0]] = subjectKeyValue[1];
+      }
+
+      // Dates
+      infoObject.validFrom = new Date(lineArray[2].split('=')[1]);
+      infoObject.validTo = new Date(lineArray[3].split('=')[1]);
+
+      // Callback and return array
+  		cb(err, infoObject);
   	});
   	openssl.stdin.write(cert);
   	openssl.stdin.end();