added types and fixed an error

- The wrong signature header was used for leaves
- Added SigIdent marshalling
- Added a wrapper that uses the log's hash function

1 files changed, 13 insertions, 0 deletions

diff --git a/types/util.go b/types/util.go
new file mode 100644
index 0000000..dc8ccba
--- /dev/null
+++ b/types/util.go
@@ -0,0 +1,13 @@
+package types
+
+import (
+	"crypto/sha256"
+)
+
+func Hash(buf []byte) *[HashSize]byte {
+	var ret [HashSize]byte
+	hash := sha256.New()
+	hash.Write(buf)
+	copy(ret[:], hash.Sum(nil))
+	return &ret
+}