optigatrust

A ctypes based Python wrapper to work with the OPTIGA™ Trust security solutions.

Features
Dependencies
Required Hardware
Installation
License
Documentation
Testing
Development

Features

Function	Module
Elliptic Curves Cryptograpy	`optigatrust.pk.ecc`
ECDSA	`optigatrust.pk.ecdsa`
RSA	`optigatrust.pk.rsa`
RSA PKCS#1 Ver1.5	`optigatrust.pk.rsassa`
Certificate Signing Request	`optigatrust.x509.csr`
Certificate handling	`optigatrust.x509.cert`
Random Number Generation	`optigatrust.rand`
Write/Read General Purpose Data	`optigatrust.util.io`

Dependencies

Python 3.7+
asn1crypto
oscrypto

Required Hardware

Either of the following: * OPTIGA™ Trust Personalisation Board * any FTDI USB-HID/I2C Converter board * Embedded Linux with open I2C lines; e.g. RPi3
OPTIGA™ Trust X/M sample

Connection details for the RPi3 and OPTIGA™ Trust X Security Shield 2Go

Installation

$ pip install optigatrust

License

optigatrust is licensed under the terms of the MIT license. See the LICENSE file for the exact license text.

Documentation

The documentation for optigatrust is composed of tutorials on basic usage and links to the source for the various pre-defined type classes.

Examples

from optigatrust.util.types import *
from optigatrust.rand import *
from optigatrust.pk import *
from optigatrust.x509 import *
import base64

print("Rand size 8 bytes: {0}\n".format(list(get_random_bytes(8))))
print("Rand size 16 bytes: {0}\n".format(list(get_random_bytes(16))))
print("Rand size 255 bytes: {0}\n".format(list(get_random_bytes(255))))

ecc_key = ecc.generate_keypair()
print("Generate NIST-P256 Keypair: {0}\n".format(list(ecc_key.pkey)))

ecdsa_signature = ecdsa.sign(ecc_key, b'Hello World')
print("Generate ECDSA Signature using the keypair: {0}\n".format(list(ecdsa_signature.signature)))

rsa_key = rsa.generate_keypair()
print("Generate RSA1k Keypair: {0}\n".format(list(rsa_key.pkey)))

rsassa_signature = rsassa.sign(rsa_key, b'Hello World')
print("Generate RSASSA Signature using the keypair: {0}\n".format(list(rsassa_signature.signature)))

csr_key = ecc.generate_keypair(curve='secp256r1', keyid=KeyId.USER_PRIVKEY_3)
print("Generate NIST-P256 Keypair for a new certificate: {0}\n".format(list(csr_key.pkey)))

builder = csr.Builder(
	{
		'country_name': 'DE',
		'state_or_province_name': 'Bayern',
		'organization_name': 'Infineon Technologies AG',
		'common_name': 'OPTIGA(TM) Trust IoT',
	},
	csr_key
)

request = builder.build(csr_key)
csr = base64.b64encode(request.dump())
print("A new CSR {0}\n".format(csr))

Testing

Tests are written using pytest and oscrypto and require these packages to be installed:

$ pip3 install pytest oscrypto
$ git clone --recurse-submodules https://github.com/Infineon/python-optiga-trust
...
$ cd python-optiga-trust
$ cd tests
$ pytest

To run only some tests, pass a regular expression as a parameter to tests.

$ pytest test_rand.py

Add support for you own Embedded Linux

You need to build the shared library for your platform for this you need to have cmake and build-essential packages installed in your system

Then you can do the following

$ cd cd python-optiga-trust/lib/optigatrust/csrc
$ mkdir build && cd build
$ cmake ..
$ make

Sample output

pi@raspberrypi:~/git/python-optiga-trust/lib/optigatrust/csrc/build $ make
Scanning dependencies of target optigatrust-libusb-linux-armv7l
[  1%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/crypt/optiga_crypt.c.o
[  3%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/util/optiga_util.c.o
[  4%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/cmd/CommandLib.c.o
[  6%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/common/Logger.c.o
[  8%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/common/Util.c.o
[  9%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c.c.o
[ 11%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_config.c.o
[ 13%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_data_link_layer.c.o
[ 14%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_physical_layer.c.o
[ 16%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_transport_layer.c.o
[ 18%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/AlertProtocol.c.o
[ 19%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsFlightHandler.c.o
[ 21%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsHandshakeProtocol.c.o
[ 22%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsRecordLayer.c.o
[ 24%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsTransportLayer.c.o
[ 26%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsWindowing.c.o
[ 27%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/HardwareCrypto.c.o
[ 29%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/MessageLayer.c.o
[ 31%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/OCP.c.o
[ 32%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga/dtls/OCPConfig.c.o
[ 34%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/optiga_trust_init.c.o
[ 36%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/optiga_comms_ifx_i2c_usb.c.o
[ 37%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_common.c.o
[ 39%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal.c.o
[ 40%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_gpio.c.o
[ 42%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_i2c.c.o
[ 44%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_ifx_usb_config.c.o
[ 45%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_os_event.c.o
[ 47%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_os_lock.c.o
[ 49%] Building C object CMakeFiles/optigatrust-libusb-linux-armv7l.dir/optiga-trust-x/pal/libusb/pal_os_timer.c.o
[ 50%] Linking C shared library ../lib/liboptigatrust-libusb-linux-armv7l.so
[ 50%] Built target optigatrust-libusb-linux-armv7l
Scanning dependencies of target optigatrust-i2c-linux-armv7l
[ 52%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/crypt/optiga_crypt.c.o
[ 54%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/util/optiga_util.c.o
[ 55%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/cmd/CommandLib.c.o
[ 57%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/common/Logger.c.o
[ 59%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/common/Util.c.o
[ 60%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c.c.o
[ 62%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_config.c.o
[ 63%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_data_link_layer.c.o
[ 65%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_physical_layer.c.o
[ 67%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/ifx_i2c/ifx_i2c_transport_layer.c.o
[ 68%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/AlertProtocol.c.o
[ 70%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsFlightHandler.c.o
[ 72%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsHandshakeProtocol.c.o
[ 73%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsRecordLayer.c.o
[ 75%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsTransportLayer.c.o
[ 77%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/DtlsWindowing.c.o
[ 78%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/HardwareCrypto.c.o
[ 80%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/MessageLayer.c.o
[ 81%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/OCP.c.o
[ 83%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/dtls/OCPConfig.c.o
[ 85%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga_trust_init.c.o
[ 86%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/optiga/comms/optiga_comms.c.o
[ 88%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal.c.o
[ 90%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal_gpio.c.o
[ 91%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal_i2c.c.o
[ 93%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/target/rpi3/pal_ifx_i2c_config.c.o
[ 95%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal_os_event.c.o
[ 96%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal_os_lock.c.o
[ 98%] Building C object CMakeFiles/optigatrust-i2c-linux-armv7l.dir/optiga-trust-x/pal/linux/pal_os_timer.c.o
[100%] Linking C shared library ../lib/liboptigatrust-i2c-linux-armv7l.so
[100%] Built target optigatrust-i2c-linux-armv7l

Development

Existing releases can be found at https://pypi.org/project/optigatrust/.

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