Function randomNonce

lib/protocol/encryption.go:519–525

randomNonce is a normal, cryptographically random nonce

()

// randomNonce is a normal, cryptographically random nonce
func randomNonce() *[nonceSize]byte {
	var nonce [nonceSize]byte
	if _, err := rand.Read(nonce[:]); err != nil {
		panic("catastrophic randomness failure: " + err.Error())
	}
	return &nonce
}

// keysFromPasswords converts a set of folder ID to password into a set of
// folder ID to encryption key, using our key derivation function.