Gnuk - software for GPG USB Token 

							    Version 0.0
							     2010-09-06
						           Niibe Yutaka
				      Free Software Initiative of Japan

What's Gnuk
===========

Gnuk is software implementation of a USB token for GNU privacy guard.
Gnuk supports OpenPGP card protocol version 2, and it runs on STM32
processor.


Release notes
=============

This is initial release of Gnuk, and it is experimental.

Tested features are:

	* Personalization of the card

	  * Changing Login name, URL, Name, Sex, Language, etc.

	* Password handling (PW1, RC, PW3)

	* Key import for signature only.

	* PSO: Digital Signature


It is known not-working:

	* Multiple key import

	* PSO: Decipher


Targets
=======

We use Olimex STM32-H103 board.

I think that it runs on Olimex STM32-P103, STBee, or STBee mini too.
Besides, we are porting it to STM32 Primer 2.


Souce code
==========

Gnuk source code is under src/ directory.


License
=======

It is distributed under GNU General Public Licence version 3 or later
(GPLv3+).


External source code
====================

Gnuk is distributed with external source code.

* ChibiOS_2.0.2/  -- ChibiOS/RT 2.0.2

  Taken from http://chibios.sourceforge.net/
  Note that CRLF is converted to LF in this repository.
  We use ChibiOS/RT as the kernel for Gnuk.

* polarssl-0.14.0/  -- PolarSSL 0.14.0

  Taken from http://polarssl.org/
  We use PolarSSL for RSA computation.

* STM32_USB-FS-Device_Driver/ -- a part of USB-FS-Device_Lib
* Virtual_COM_Port/ -- a part of USB-FS-Device_Lib

  STM32F10x USB Full Speed Device Library (USB-FS-Device_Lib)
  is a STM32F10x library for USB functionality.

  I took Libraries/STM32_USB-FS-Device_Driver and a part of
  Project/ in STM32_USB-FS-Device_Lib distribution.
  See http://www.st.com for detail.


How to compile
==============

You need GNU toolchain and newlib for 'arm-none-eabi' target.

See http://github.com/esden/summon-arm-toolchain/ for preparation of
GNU Toolchain for 'arm-none-eabi' target.

  $ cd gnuk-VERSION/src

Edit the Makefile.  Comment out the line:
----------------
ENABLE_DEBUG=1
----------------

if you don't want to debug Gnuk.

Type:

  $ make

In the make process, it takes time for the command of

   dd if=/dev/random bs=1 of=random_bits count=1024

Don't just wait, but do some other work on your PC.
/dev/random needs entropy to finish.

Then, we will have "gnuk.elf".


How to run
==========

If you are using Olimex JTAG-Tiny, type following to invoke OpenOCD:

  $ openocd -f interface/olimex-jtag-tiny.cfg -f board/olimex_stm32_h103.cfg

Then, with another terminal, type following to write "gnuk.elf" to Flash ROM:

  $ telnet localhost 4444
  > reset halt
  > flash write_image erase gnuk.elf
  > reset
  > exit
  $ 

If you compiled with ENABLE_DEBUG=1, Gnuk has two interfaces
(one is CCID/ICCD device and another is virtual COM port).  Open
virtual COM port by:

  $ cu -l /dev/ttyACM0

and you will see debug output of Gnuk.

For libccid, we need following change:

--- /etc/libccid_Info.plist.dpkg-dist	2009-07-29 06:50:20.000000000 +0900
+++ /etc/libccid_Info.plist	2010-09-05 09:09:49.000000000 +0900
@@ -104,6 +104,7 @@
 
 	<key>ifdVendorID</key>
 	<array>
+		<string>0x234B</string>
 		<string>0x08E6</string>
 		<string>0x08E6</string>
 		<string>0x08E6</string>
@@ -237,6 +238,7 @@
 
 	<key>ifdProductID</key>
 	<array>
+		<string>0x0000</string>
 		<string>0x2202</string>
 		<string>0x3437</string>
 		<string>0x3438</string>
@@ -370,6 +372,7 @@
 
 	<key>ifdFriendlyName</key>
 	<array>
+		<string>FSIJ USB Token</string>
 		<string>Gemplus Gem e-Seal Pro</string>
 		<string>Gemplus GemPC Twin</string>
 		<string>Gemplus GemPC Key</string>
------------------


Then, try following to see Gnuk runs:

  $ gpg --card-status


For more, see doc/DEMO.



How to debug
============

We can use GDB.

  $ arm-none-eabi-gdb gnuk.elf


Inside GDB, we can connect OpenOCD by:

  (gdb) target remote localhost:3333



Development history
===================

Initially, the development was started with a copy of the files in
ChibiOS_2.0.2/demos/ARMCM3-STM32F103-GCC/*, Makefile, linker script,
and header files (chconf.h, halconf.h, and mcuconf.h).

Since this is the initial release, some garbages may still remain.
--