Add support for password safes

A password safe (PWS) stores names, logins and passwords in slots.  PWS
are supported both by the Nitrokey Pro and the Nitrokey Storage.  They
are implemented as a struct wrapping a device as the device may not be
disconnected while the password safe is alive.  The creation of a
password safe is handled by the GetPasswordSafe trait, implemented by
DeviceWrapper, Pro and Storage.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/device.rs b/src/device.rs
index 1201540..7d69df8 100644
--- a/src/device.rs
+++ b/src/device.rs
@@ -3,6 +3,7 @@ use libc;
 use nitrokey_sys;
 use std::ffi::CString;
 use otp::GenerateOtp;
+use pws::GetPasswordSafe;
 use util::{get_last_error, result_from_string, CommandError, CommandStatus};
 
 /// Available Nitrokey models.
@@ -147,7 +148,7 @@ pub struct Storage {}
 ///
 /// This trait provides the commands that can be executed without authentication and that are
 /// present on all supported Nitrokey devices.
-pub trait Device: GenerateOtp {
+pub trait Device: GetPasswordSafe + GenerateOtp {
     /// Returns the serial number of the Nitrokey device.  The serial number is the string
     /// representation of a hex number.
     ///