From 80bfe1321c946192e154dd5d03d28bee88b57622 Mon Sep 17 00:00:00 2001
From: Andrew Ayer <agwa@andrewayer.name>
Date: Sat, 26 Mar 2016 18:04:22 -0700
Subject: [PATCH] Add helpers to get fingerprint/hashes in byte form

---
 helpers.go | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/helpers.go b/helpers.go
index 6d8e209..d8a6a73 100644
--- a/helpers.go
+++ b/helpers.go
@@ -71,9 +71,13 @@ func formatSerialNumber (serial *big.Int) string {
 	}
 }
 
-func sha256hex (data []byte) string {
+func sha256sum (data []byte) []byte {
 	sum := sha256.Sum256(data)
-	return hex.EncodeToString(sum[:])
+	return sum[:]
+}
+
+func sha256hex (data []byte) string {
+	return hex.EncodeToString(sha256sum(data))
 }
 
 type EntryInfo struct {
@@ -173,6 +177,10 @@ func (info *CertInfo) PubkeyHash () string {
 	return sha256hex(info.TBS.GetRawPublicKey())
 }
 
+func (info *CertInfo) PubkeyHashBytes () []byte {
+	return sha256sum(info.TBS.GetRawPublicKey())
+}
+
 func (info *CertInfo) Environ () []string {
 	env := make([]string, 0, 10)
 
@@ -232,6 +240,14 @@ func (info *EntryInfo) Fingerprint () string {
 	}
 }
 
+func (info *EntryInfo) FingerprintBytes () []byte {
+	if len(info.FullChain) > 0 {
+		return sha256sum(info.FullChain[0])
+	} else {
+		return []byte{}
+	}
+}
+
 func (info *EntryInfo) typeString () string {
 	if info.IsPrecert {
 		return "precert"