key decoding functions

2 files changed, 18 insertions, 12 deletions

diff --git a/key/box.go b/key/box.go
index 05d8991..38997eb 100644
--- a/key/box.go
+++ b/key/box.go
@@ -60,18 +60,21 @@ func loadBoxKey(filename string) ([32]byte, error) {
 	}
 
 	// Decode key.
+	return decodeBoxKey(buf)
+}
+
+func (bpk1 BoxPublicKey) Compare(bpk2 BoxPublicKey) int {
+	return bytes.Compare(bpk1[:], bpk2[:])
+}
+
+func decodeBoxKey(buf []byte) ([32]byte, error) {
 	var key [32]byte
 	if hex.DecodedLen(len(buf)) != len(key) {
-		return [32]byte{}, fmt.Errorf("malformed key: expected %d bytes; got %d",
+		return [32]byte{}, fmt.Errorf("malformed box key: expected %d bytes; got %d",
 			len(key), hex.DecodedLen(len(buf)))
 	}
 	if _, err := hex.Decode(key[:], buf); err != nil {
 		return [32]byte{}, err
 	}
-
 	return key, nil
 }
-
-func (bpk1 BoxPublicKey) Compare(bpk2 BoxPublicKey) int {
-	return bytes.Compare(bpk1[:], bpk2[:])
-}
diff --git a/key/sig.go b/key/sig.go
index c0bc515..6be68f9 100644
--- a/key/sig.go
+++ b/key/sig.go
@@ -37,18 +37,21 @@ func LoadSigPublicKey() (SigPublicKey, error) {
 	}
 
 	// Decode key.
+	return decodeSigPublicKey(buf)
+}
+
+func (spk1 SigPublicKey) Compare(spk2 SigPublicKey) int {
+	return bytes.Compare(spk1[:], spk2[:])
+}
+
+func decodeSigPublicKey(buf []byte) (SigPublicKey, error) {
 	var key SigPublicKey
 	if hex.DecodedLen(len(buf)) != len(key) {
-		return SigPublicKey{}, fmt.Errorf("malformed key: expected %d bytes; got %d",
+		return SigPublicKey{}, fmt.Errorf("malformed signature verification key: expected %d bytes; got %d",
 			len(key), hex.DecodedLen(len(buf)))
 	}
 	if _, err := hex.Decode(key[:], buf); err != nil {
 		return SigPublicKey{}, err
 	}
-
 	return key, nil
 }
-
-func (spk1 SigPublicKey) Compare(spk2 SigPublicKey) int {
-	return bytes.Compare(spk1[:], spk2[:])
-}