From f7e15669c89e1af164b673c6fc51e2fb8e82c6a8 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Thu, 6 Jul 2017 08:40:58 +0100
Subject: [PATCH] Added Commit.ExtractSignature to wrap
 git_commit_extract_signature

---
 commit.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/commit.go b/commit.go
index 07b7c37..fc2815a 100644
--- a/commit.go
+++ b/commit.go
@@ -26,6 +26,27 @@ func (c Commit) RawMessage() string {
 	return C.GoString(C.git_commit_message_raw(c.cast_ptr))
 }
 
+func (c Commit) ExtractSignature() (string, string, error) {
+
+	var c_signed C.git_buf
+	defer C.git_buf_free(&c_signed)
+
+	var c_signature C.git_buf
+	defer C.git_buf_free(&c_signature)
+
+	oid := c.Id()
+	
+	repo := C.git_commit_owner(c.cast_ptr)
+	ret := C.git_commit_extract_signature(&c_signature, &c_signed, repo, oid.toC(), nil)
+	
+	if ret < 0 {
+		return "", "", MakeGitError(ret) 
+	} else {
+		return C.GoString(c_signature.ptr), C.GoString(c_signed.ptr), nil
+	}
+	
+}
+
 func (c Commit) Summary() string {
 	return C.GoString(C.git_commit_summary(c.cast_ptr))
 }