trsfile 0.1.2

Library to read and create Riscure Inspector trace set files (.trs)

Inspector Trace Set .trs file support in Python

Riscure Inspector uses the .trs file format to save and read traces from disk. To better assist reading and writing trace set files from third parties, Riscure published this Python library.

Quick start

This library supports reading and writing of .trs files, but it does not (yet) support modifying existing .trs files. Both the TrcFile and the Trace class emulate all the functionality of a list, so slice to your heart's content!

Installation

This library is available on PyPi for Python 3 and up. Just add trsfile to your requirements.txt or install it via the command line:

pip install trsfile

Reading .trs files

import trsfile

with trsfile.open('new.trs') as trs_file:
	# Show all headers
	for header, value in trs_file.headers.items():
		print(header, '=', value)
	print()

	# Iterate over the first 25 traces
	for i, trace in enumerate(trs_file[0:25]):
		print('Trace {0:d} contains {1:d} samples'.format(i, len(trace)))
		print('  - minimum value in trace: {0:f}'.format(min(trace)))
		print('  - maximum value in trace: {0:f}'.format(max(trace)))

Creating .trs files

import random, os
from trsfile import trs_create, Trace, SampleCoding, TracePadding, Header

with trs_create('new.trs', TracePadding.PAD, force_overwrite = True) as trs_file:
	# Extend the trace file with 100 traces with each 1000 samples
	trs_file.extend([
		Trace(
			SampleCoding.FLOAT,
			[random.uniform(-255, 255) for _ in range(0, 1000)],
			data = os.urandom(16)
		)
		for _ in range(0, 100)]
	)

	# Replace 5 traces (the slice [0:10:2]) with random length traces.
	# Because we are creating using the TracePadding.PAD mode, all traces
	# will be padded to the trace with the biggest length.
	trs_file[0:10:2] = [
		Trace(
			SampleCoding.FLOAT,
			[random.uniform(0, 255) for _ in range(0, random.randrange(1000))],
			data = os.urandom(16),
			title = 'Clipped trace'
		)
		for _ in range(0, 5)
	]

	# Lets delete 10 traces as they are supposedly malformed :)
	del trs_file[40:50]

	# Finally, change some headers, all available headers are defined in the Header class
	trs_file.headers[Header.LABEL_X] = 'Time'
	trs_file.headers[Header.LABEL_Y] = 'Voltage'
	trs_file.headers[Header.DESCRIPTION] = 'Traces created for some purpose!'

	print('Total length of new trace set: {0:d}'.format(len(trs_file)))

Documentation

The full documentation is available in the doc folder with a readable version on readthedocs.

Testing

The library supports Python unittest module and the tests can be executed with the following command:

python -m unittest

License

BSD 3-Clause Clear License