added signed cert methods

Author: debonair

lib/pem.js

@@ -18,6 +18,8 @@ module.exports.readCertificateInfo = readCertificateInfo;
 module.exports.getPublicKey = getPublicKey;
 module.exports.getFingerprint = getFingerprint;
 module.exports.getModulus = getModulus;
+module.exports.getModulusOfSignedCert = getModulusOfSignedCert;
+module.exports.getModulusOfCertificate = getModulusOfCertificate;
 module.exports.config = config;
 
 // PUBLIC API
@@ -56,9 +58,9 @@ function createPrivateKey(keyBitsize, options, callback) {
         params.push( '-passout' );
         params.push( 'file:' + clientKeyPassword );
     }
-    
+
     params.push(keyBitsize);
-    
+
     execOpenSSL(params, 'RSA PRIVATE KEY', function(error, key) {
         if(clientKeyPassword) {
             fs.unlink(clientKeyPassword);
@@ -426,6 +428,49 @@ function getModulus(certificate, callback) {
     });
 }
 
+function getModulusOfCertificate(certificate, password, callback)
+{
+    if (password && password !== '' && password !== null) {
+        getModulusOfSignedCert(certificate,password,callback);
+    } else {
+        getModulus(certificate,callback);
+    }
+}
+
+function getModulusOfSignedCert(certificate, password, callback){
+    certificate = Buffer.isBuffer(certificate) && certificate.toString() || certificate;
+
+    var type = '';
+    if (certificate.match(/BEGIN(\sNEW)? CERTIFICATE REQUEST/)) {
+        type = 'req';
+    } else if (certificate.match(/BEGIN RSA PRIVATE KEY/)) {
+        type = 'rsa';
+    } else {
+        type = 'x509';
+    }
+    var params = [type,
+        '-noout',
+        '-modulus',
+        '-in',
+        '--TMPFILE--',
+        '-passin',
+        'pass:' + password
+    ];
+    spawnWrapper(params, certificate, function(err, code, stdout) {
+        if (err) {
+            return callback(err);
+        }
+        var match = stdout.match(/Modulus=([0-9a-fA-F]+)$/m);
+        if (match) {
+            return callback(null, {
+                modulus: match[1]
+            });
+        } else {
+            return callback(new Error('No modulus'));
+        }
+    });
+}
+
 /**
  * config the pem module
  * @param {Object} options