From 639a5379e9abf4a3f0d88464d1a229f8d5df14ae Mon Sep 17 00:00:00 2001
From: Gibheer <gibheer@gmail.com>
Date: Wed, 18 Feb 2015 22:55:29 +0100
Subject: add sign and verification to ecdsa

This commit adds support to sign and verify messages using ecdsa.
---
 types.go | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

(limited to 'types.go')

diff --git a/types.go b/types.go
index b05bd40..22c35d4 100644
--- a/types.go
+++ b/types.go
@@ -14,8 +14,10 @@ type (
   PrivateKey interface {
     // derive a public key from the private key
     Public() PublicKey
-    // sign a message with the private key
-    Sign(message []byte) ([]byte, error)
+    // Sign a message using the public key and the given hash method.
+    // To use a hash method, include the package
+    //   import _ "crypto/sha512"
+    Sign(message []byte, hash crypto.Hash) ([]byte, error)
 
     // return the private key structure
     privateKey() crypto.PrivateKey
@@ -25,7 +27,7 @@ type (
   PublicKey interface {
     Pemmer
     // use the public key to verify a message against a signature
-    Verify(message []byte, signature []byte) (bool, error)
+    Verify(message []byte, signature []byte, hash crypto.Hash) (bool, error)
   }
 
   Pemmer interface {
-- 
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