Return an error when data is corrupt

util/cryp/cryp.go

@@ -17,6 +17,7 @@ package cryp
 import (
 	"crypto/aes"
 	"crypto/cipher"
+	"errors"
 	"github.com/abcum/surreal/util/rand"
 )
 
@@ -53,7 +54,7 @@ func Decrypt(key []byte, src []byte) (dst []byte, err error) {
 
 	// Corrupt
 	if len(src) < 12 {
-		return src, nil
+		return src, errors.New("Invalid data")
 	}
 
 	// Initiate AES

util/cryp/cryp_test.go

@@ -62,8 +62,9 @@ func TestCorrupt(t *testing.T) {
 	enc := []byte("corrupt")
 
 	Convey("Cryptography should fail", t, func() {
-		dec, _ := Decrypt(key, enc)
+		dec, err := Decrypt(key, enc)
 		Convey("Decrypt", func() {
+			So(err, ShouldNotBeNil)
 			So(dec, ShouldResemble, enc)
 		})
 	})