Connection Quick-Start

1. Install Python and Dependancies

   Windows:

   • Install Python distribution (such as WinPython), see Installing_WinPython

   • Using the Python Command Prompt, use pip to install the following:

     pip install pyside
     pip install configobj
     pip install pyusb
     pip install pyqtgraph 

   What is included in releases varies. If you get a message saying it is already installed you can simply continue with this tutorial.

   Linux:

   • Python should come pre-installed. If so you'll also need to install the following from your package manager:

     • pyside
     • configobj
     • scipy
     • numpy

     For example the following shows the install command for Ubuntu:

     sudo apt-get install python2.7 python2.7-dev python2.7-libs python-numpy python-scipy python-pyside python-configobj python-setuptools python-pip

   • Some packages may require installation via 'pip', as they are not always in your package manager repo:

     $pip install pyusb
     $pip install pyqtgraph         

   Mac OS-X:

   • Install homebrew, pyside, libusb, along with required Python modules.
   • See MacOSX_Installation for full details.

2. Download and install ChipWhisperer

   • Download the latest release linked from ChipWhisperer.com
   • Unzip the file somewhere. Generally 'somewhere' will become your ChipWhisperer working directory. These examples assume you've chosen C:\chipwhisperer as your working directory.

   • Open a Python terminal (again if using WinPython be sure to run the specific Python command prompt), and run the following, adjusting paths as needed to refelct your working directory:

     cd c:\chipwhisperer\openadc\controlsw\python
     python setup.py develop
     cd c:\chipwhisperer\software
     python setup.py develop

   If you wish to confirm the installation worked, you can run ChipWhispererAnalyzer in the same terminal:

   cd c:\chipwhisperer\software\chipwhisperer
   python CWAnalyzer.pyw

3. Connect ChipWhisperer-Lite, install USB Drivers:

   Windows:

   • Plug micro-USB cable into ChipWhisperer-Lite
   • If the "New Hardware Found" wizard doesn't prompt you for drivers, go to the control panel and find the "ChipWhisperer-Lite" device, and select "Update Drivers".
   • You can find drivers in c:\chipwhisperer\hardware\capture\chipwhisperer-lite\. You will likely need to extract them from the cwlite_usb_driver.zip file. If so simply extract them somewhere (i.e. your desktop), and then point the new hardware found wizard to that location.

   Linux:

   • Driver installation is not required, but if you do not update the 'udev' system, you will be unable to run ChipWhisperer-Capture as a regular user. To update the udev system, first make sure the ChipWhisperer-Lite is Make a file called /etc/udev/rules.d/99-cwlite.rules . The contents of this file should be:

     # allow users to claim the device
     SUBSYSTEM=="usb", ATTRS{idVendor}=="2b3e", ATTRS{idProduct}=="ace2", MODE="0664", GROUP="plugdev"

   • Add your username to the plugdev group:

     $ sudo usermod -a -G plugdev YOUR-USERNAME

   • And reset the udev system:

     $ sudo udevadm control --reload-rules

   • Finally log out & in again for the group change to take effect.
   • Connect the micro-USB cable

   MAC:

   • No special installation required - must ensure you have installed libusb via homebrew (see instructions at MacOSX_Installation).

4. Run ChipWhisperer-Capture. This can be done from one of three ways:

   • Double-click on CWCapture.pyw in the chipwhisperer\software folder. You must have installed Python into your path for this to work.
   • run python CWCapture.pyw from the chipwhisperer\software folder using a command prompt with Python in the path.
   • run python CWCaptureGUI.py from the chipwhisperer\software\chipwhisperer\capture\ui directory.

   The last option is the most reliable, in that it should always work on all platforms. If it doesn't start look for possible missing modules or other useful errors.

   hint

   The first time you run ChipWhisperer-Capture or -Analyzer, the default setup of the screen is somewhat insane. You can drag windows around or close them to make it look more like the demos here. See the Video quickstart guide as well for details of that.

5. From the "Scripts" directory, run the ChipWhisperer-Lite: AES SimpleSerial on XMEGA script:

   

   This should connect to the ChipWhisperer-Lite, program the FPGA, and run a few captures. Your screen should look something like this now:

   

6. If the previous step fails, you may need to set the path for the "firmware". This is done by going to the "Tools" menu and selecting the "Config CW Firmware" option. Note on MAC OS X a special command is required instead sometimes, see MacOSX_Installation.

   From there, hit the "FIND" button beside the "FPGA .zip (Release)" option. Point it to the file located at chipwhisperer/hardware/capture/chipwhisperer-lite/cwlite_firmware.zip on your filesystem.

7. Your ChipWhisperer-Lite is now connected. See the next section for details of the demo attack.

Capture and Attack Quickstart

1. See Tutorial_B5_Breaking_AES_(Straightforward)for details. Note the hardware setup is slightly different -- but you can skip to step 5.5.3, and should be able to pick up from there. Be sure to use the ChipWhisperer-Lite: AES SimpleSerial on XMEGA script instead of the one referenced in step 5.5.3.

Important Bugs/Caveats

The following includes various things that might trip you up:

1. If you save the project before running the capture, you can specify any directory. Traces will be copied to the appropriate location during capture.
2. If you save the project after running the capture, you must save the project to the same directory that "default-data-dir" exists in. This is normally the folder from where you invoked the Python GUI.
3. There are a few warnings/exceptions that come up (i.e. divide-by-zero). Generally just keep going and see if things are still working. A number of those are on the TODO list to fix but I didn't get around to it yet.
4. The "Total Ops" window which checks for proper AES operation requires PyCrypto to be installed.
5. By default the XMEGA device was programmed with a partial AES implementation only. This is done to avoid any crypto export issues. This does not affect your side-channel analysis, but be aware the returned value might not appear to be correct (since only the first couple rounds of AES occurred).

CW-Lite: Programming AVR/XMEGA Device

The CW1173 has built-in support for programming either Atmel AVR or Atmel XMEGA device. This is designed to allow you to program our target boards (either the built-in XMEGA target, or the Multi-Target board).

Note this programmer is fairly simple, and does not provide all the features of a stand-alone programmer.

Using Glitch Port

The "GLITCH" port is used for voltage glitching. It's connected to two MOSFET elements, as the following figure shows:

The CW1173 glitch output can be commanded to turn on either of those MOSFETs via the "Glitch Out Enable" checkboxes:

Be careful using this feature, as you don't want to short the MOSFETs for too long. It's also possible to damage the ChipWhisperer-Lite by burning these MOSFETs up if used incorrectly. See tutorial #A3 for more information on using this feature.

Using Measure Port

The "MEASURE" port is the input to the low-noise amplifier and ADC.

20-Pin Connector

The pinout is as follows:

8-Pin SmartCard Connector

The CW1173 contains two 8-pin connectors, which use our standard 8-pin Smart-Card header pinout. One header connects to the SAM3U device (which has ISO-7816 drivers), one header connects to the FPGA. Note there is currently no firmware support for these devices, but the hardware is designed for any of the following:

• Emulating a smart card (use interposer board), or fuzzing a smart card reader
• Communicating to a smart card
• Sniffing traffic between a legitimate reader and smart card
• Side-channel analysis of smart card device

Header J7 (Connects to SAM3U):

Header J6 (Connects to FPGA):

Upgrading SAM3U Firmware

When talking about the ChipWhisperer-Lite's firmware, there is really two parts to this:

1. The FPGA Bitstream file.
2. The SAM3U USB interface chip firmware.

The FPGA bitstream alone is what is normally configured by the ChipWhisperer-Capture software. This bitstream is always the most up-to-date, since it's automatically reloaded by the computer every time you power cycle the ChipWhisperer-Capture. The SAM3U firmware however is not automatically updated, but it tends to change less frequently.

Found CW-Lite, Serial Number = 442031204630xxxxxxxxxxx
SAM3U Firmware version = 0.11 b0
Programmed FPGA

Manual Update

If the above instructions fail, there is no big problem. The SAM3U chip contains a hardware-resident bootloader. You may need to follow instructions on the Manual SAM3U Firmware Update page (including using BOSSA) if you are unable to use the automatic system that is part of ChipWhisperer-Capture.

Breaking Target Section Apart

You may wish to break the target section apart from the main capture board. This can easily be accomplished by following these instructions:

1. Using a sharp knife (such as Xacto knife or retractable safety knife), cut the traces on the bottom side of the board along the cut line. Pass the knife back and forth several times. Scoring the board deeply will make the breaking process easier and less stressful on the PCB:

   

2. Score the board on the top side:

3. Select a surface to break the board over. It is suggested to have a piece of cardboard or boxboard down to protect components on the bottom side of the ChipWhisperer:

4. Hold the main board section flat, apply even pressure to the target board section. It should snap downward:

5. Separate the two sections:

You can see a Video of the process here:

Applying even pressure will help prevent damage to the ChipWhisperer-Lite main section. Flexing the PCB too much may cause damage to solder joints, but by holding the entire board flat against the edge this is prevented.

Advanced Usage

Mounting Jumpers

Note the ChipWhisperer-Lite main board and target section contain a number of jumper options. By default these are not mounted, and solder jumper bridges on the PCB have been bridged to select the appropriate options when required. Some options are only solder jumpers, which to move the jumper requires a soldering iron to bridge or clear the appropriate connections.

The following lists jumpers on the ChipWhisperer-Lite / Target Section:

Capture Section Jumpers

• JP4 is the "RESET" net for the SAM3U processor.
• JP2 causes the SAM3U processor flash memory to be erased. When the chip is erased a rom-resident bootloader takes over. See section XXXXX for bootloader details.
• JP5 selects the IO voltage for the FPGA bank which connects to the 20-pin target. By default SJ6 selects this to be 3.3V. It is not recommended to change this, as it is easy to damage the FPGA by feeding an out-of-range voltage in.
• SJ1 selects if the power supply comes from the Micro-USB connector (default) or an external 5V supply at the +5VIN pin.

Target Section Jumpers

• JP7 connects the "MEASURE" SMA to the XMEGA VCC Rail. Shorted by default with SJ4.
• JP6 connects the "GLITCH" SMA to the XMEGA VCC Rail. Shorted by default with SJ5.
• JP12 can be used to feed an external voltage into the XMEGA VCC Rail. By default SJ3 connects this to 3.3V.
• SJ2 selects if the 3.3V rail comes from the 20-pin IDC connector (i.e. ChipWhisperer-Lite board), or via an optional LDO and USB connector.

Old Hardware (see RTFM.NEWAE.COM for new)

3rd Party Targets	SAKURA-G Target • SASEBO-W Target
Test Equipment	PicoScope (USB Scope) • VISA Connected Oscilloscope
Obsolete	CW1002 ChipWhisperer Capture Rev2 • CW301 Multi-Target