Add hash option to getFingerprint function

`getFingerprint(certificate, [hash,] callback)`
Dexus · Feb 24, 2015 · d8556de · d8556de
1 parent 9f16c23
commit d8556de
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Showing 2 changed files with 13 additions and 3 deletions.
diff --git a/README.md b/README.md
@@ -142,13 +142,14 @@ Where
 
 ### Get fingerprint
 
-Use `getFingerprint` to get the SHA1 fingerprint for a certificate
+Use `getFingerprint` to get the default SHA1 fingerprint for a certificate
 
-    pem.getFingerprint(certificate, callback)
+    pem.getFingerprint(certificate, [hash,] callback)
 
 Where
 
   * **certificate** is a PEM encoded certificate
+  * **hash** is a hash function to use (either `md5`, `sha1` or `sha256`, defaults to `sha1`)
   * **callback** is a callback function with an error object and `{fingerprint}`
 
 ### Get modulus

diff --git a/lib/pem.js b/lib/pem.js
@@ -411,12 +411,21 @@ function config(options) {
  * @param {String} PEM encoded certificate
  * @param {Function} callback Callback function with an error object and {fingerprint}
  */
-function getFingerprint(certificate, callback) {
+function getFingerprint(certificate, hash, callback) {
+
+	if (!callback && typeof hash === 'function') {
+        callback = hash;
+        hash = undefined;
+    }
+
+	hash = hash || 'sha1';
+
     var params = ['x509',
         '-in',
         '--TMPFILE--',
         '-fingerprint',
         '-noout'
+		'-'+hash
     ];
 
     spawnWrapper(params, certificate, function(err, code, stdout) {