switch to go vendoring

vendor/github.com/longsleep/rndm/byte.go

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017 Kopano
+ *
+ * Use of this source code is governed by a MIT license
+ * that can be found in the LICENSE.txt file.
+ *
+ */
+
+package rndm
+
+import (
+	"crypto/rand"
+)
+
+// GenerateRandomBytes returns securely generated random bytes. It will panic
+// when the system fails to provide enough secure random data.
+func GenerateRandomBytes(n int) []byte {
+	b := make([]byte, n)
+	_, err := ReadRandomBytes(b)
+	if err != nil {
+		panic("unable to read enough random bytes")
+	}
+
+	return b
+}
+
+// ReadRandomBytes is a helper function that reads random data into the provided
+// []byte. Tt returns the number of random bytes read and an error if fewer
+// bytes were read.
+func ReadRandomBytes(b []byte) (n int, err error) {
+	return rand.Read(b)
+}