Microchip Zero Touch Secure Provisioning Kit for AWS IoT

This package contains all the files to run the Microchip Zero Touch Secure Provisioning Kit for AWS IoT.

Latest product information can be found at http://www.microchip.com/developmenttools/productdetails.aspx?partno=at88ckecc-aws-xstk-b

The full user guide can be found at http://microchipdeveloper.com/iot:ztpk

Quick Setup

This section serves as a quick reference for the setup required. The full user manual referenced above will give more detailed instructions.

Software Setup

1. Clone or Download the AWS IOT Zero-Touch Secure Provisioning kit software.

   Note- CryptoAuthLib is a submodule and is not automatically included and will need to be cloned recursively or downloaded separately from the kit software. If downloaded separately, the files will need to be placed in firmware\SAMG55\AWS_IoT_Zero_Touch_SAMG55\src\cryptoauthlib folder

2. Install AWS CLI. Used to configure AWS credentials for the python scripts.

3. Install serial terminal emulator, like PuTTY. Used to view status/debug information from the SAMG55.

4. Install Python 3. Make sure to include pip and tcl/tk. PC side work is all done from python scripts.

5. Install Python packages (pip install –r requirements.txt) required for the kit python scripts.

6. Maybe install Visual C++ 2017 Build Tools. Microsoft Visual C++ Build Tools 14.0 may be required for the hidapi python package. This is a big download/install and it is not needed if the previous step completed without error.

AWS Setup

Automated Setup

See AWS CloudFormation templates and documentation in the cloud-formation-templates folder.

Manual Setup

1. Log into the AWS Console for your account and select the region you want to run the kit from.

2. Create an IAM user to demo/run the kit from:

   • User name: ZTUser
   • Enable Programmatic access and AWS Management Console access
   • Add AWS managed policies AWSIoTFullAccess and AWSLambdaFullAccess
   • Run aws configure from the command line on your PC to configure the AWS credentials for the ZTUser account. Make sure the enter the same region as selected in the previous step.

3. Create JITR Lambda Function Policy

   • Name: ZTLambdaJITRPolicy

   • Policy Document:

     {
         "Version": "2012-10-17",
         "Statement": [
             {
                 "Effect": "Allow",
                 "Action": [
                     "iot:UpdateCertificate",
                     "iot:CreatePolicy",
                     "iot:AttachPrincipalPolicy",
                     "iot:CreateThing",
                     "iot:CreateThingType",
                     "iot:DescribeCertificate",
                     "iot:DescribeCaCertificate",
                     "iot:DescribeThing",
                     "iot:DescribeThingType",
                     "iot:GetPolicy"
                 ],
                 "Resource": "*"
             }
         ]
     }

4. Create JITR Lambda Function Role

   • Role type: AWS Service Role > AWS Lambda
   • Name: ZTLambdaJITRRole
   • Add policies AWSLambdaBasicExecutionRole, AWSXrayWriteOnlyAccess, and ZTLambdaJITRPolicy.

AWS Configuration

1. Once AWS has been configured successfully, Run aws configure from the command line. (part of the AWS CLI download)
2. Enter the AWS Access Key ID from AWS and press enter.
3. Enter the Secret Access Key from AWS and press enter.
4. Ensure that the defualt region name matches the AWS account.
5. Press enter for the Default output format[None]: prompt.

Hardware Setup

The central hub of the kit is the SAMG55 Xplained Pro board.

1. Plug WINC1500 Xplained Pro into EXT1 on the SAMG55 Xplained Pro.
2. Plug OLED1 Xplained Pro into EXT3 on the SAMG55 Xplained Pro.
3. Plug CryptoAuth Xplained Pro into EXT4 on the SAMG55 Xplained Pro. Please note, depending on when you purchased your kit, your kit may have come with CryptoAuth Xplained Pro Rev A boards or Rev B boards. Rev B boards have an ATECC608A device attached and do not come pre-configured. Extra steps need to be followed to initialize the ATECC CryptoAuthentication device on the board. Begin the initialization process by running the firmware without the WINC1500 Xplained Pro board attached. The firmware will automatically guide you through this process with instructions from EDBG serial port output messages.
4. Plug USB cable from PC into Target USB port on the SAMG55 Xplained Pro. Once the firmware is loaded, the board communicates with the scripts on the PC via this port as an HID device.
5. Plug USB cable from PC into EDBG USB port on the SAMG55 Xplained Pro. This port is how the firmware is loaded/updated and also exposes a serial port (COM port) that outputs debug/status information (115200 baud).

Firmware Setup

While the revision B kit comes with the appropriate firmware loaded, the original (rev A) kit will need firmware updates to work. Additionally, new firmware updates may be released.

1. Update the WINC1500 firmware to 19.5.2. Use Atmel Studio to find create a new ASF Example Project for the WINC1500 Firmware Update Project (v19.5.2) - SAMG55 Xplained Pro. Run the samg55_xplained_pro_firmware_update.bat batch script from the src folder to update.
2. Update the SAMG55 firmware to the latest version in the firmware folder of this package.
3. Once the firmware has been successfully downloaded open a serial terminal and press the reset button on the SAMG55. There should be instructions on how to proceed.

Quick Demo

This section serves as a quick reference for the steps required. The full user manual referenced above will give more detailed instructions.

Configure AWS for Just In Time Registration (JITR)

These steps will be performed from the IAM user, ZTUser, created for demonstrating this kit.

Note - If the AWS CloudFormation template was used these two steps can be skipped.

1. Create the Just In Time Registration (JITR) Lambda Function

   • Name: ZTLambdaJITR
   • Runtime: Python 3.6
   • Copy and paste the code found in ZTLambdaJITR/lambda_function.py into the code entry area.
   • Existing Role: ZTLambdaJITRRole

2. Create IoT Rules Engine Rule for triggering the JITR lambda function.

   • Name: ZeroTouchJustInTimeRegistration
   • SQL version: 2016-03-23
   • Rule query statement: SELECT * FROM '$aws/events/certificates/registered/#'
   • Add action to invoke the ZTLambdaJITR lambda function.

Create and Register the Certificate Authorities (CAs)

1. Run python ca_create_root.py to create a root CA.
2. Run python ca_create_signer_csr.py to create a CSR for a signer.
3. Run python ca_create_signer.py to sign the signer CSR with the root CA.
4. Run python aws_register_signer.py to register the signer with AWS IoT.

Provision the ATECCx08A on the kit

1. Run python kit_set_wifi.py --ssid wifi-name --password wifi-password to configure wifi settings on the board. This network must have internet access with ports 123 (UDP, time server) and 8883 (TCP, secure MQTT) open.

2. Run python kit_provision.py to provision the ATECCx08A on the board for AWS IoT. After this command, the board will automatically attempt to connect to AWS IoT.

Interact with the Board via AWS

1. Run python aws_interact_gui.py to interact with the board and toggle LEDs. Pressing the buttons on the board will also update their state in the GUI.

Releases

2019-06-21

• Updated firmware to v2.2.5
• Updated CryptoAuthLib to 20190517
• Updated ASF to 3.40.0
• Minor bugs fixes around USB communication and date handling

2018-03-19

• Updated aws_register_signer.py to account for new datetime fields from AWS

2017-12-19

• Updated CA scripts to use fixed set of extensions for CSR and certificate
• Set fixed version of pyasn1_modules as new version broke cert2certdef.py

2017-11-17

• Updated firmware to v2.2.4 to bring in ATECC608A support with CryptoAuthLib release 3.
• Firmware now supports automatic pre-configuration of new ATECC508A and ATECC608A devices.
• Fixed a memory leak in the JSON parsing.

2017-9-26

• Updated firmware to v2.2.2 to resolve DNS lookup issue

2017-9-18

• Initial release of software and firmware v2.2.1