SignXML: XML Signature in Python

SignXML is an implementation of the W3C XML Signature standard in Python (both “Second Edition” and Version 1.1). This standard (also known as XMLDSig and RFC 3275) is used to provide payload security in SAML 2.0, among other uses. SignXML implements all of the required components of the standard, and most recommended ones. Its features are:

Use of defusedxml.lxml to defend against common XML-based attacks when verifying signatures
Extensions to allow signing with and verifying X.509 certificate chains, including hostname/CN validation
Support for exclusive XML canonicalization with inclusive prefixes (InclusiveNamespaces PrefixList, required to verify signatures generated by some SAML implementations)
Modern Python compatibility (2.7-3.4+ and PyPy)
Well-supported, portable, reliable dependencies: lxml, defusedxml, cryptography, eight, pyOpenSSL
Comprehensive testing (including the XMLDSig interoperability suite) and continuous integration
Simple interface with useful defaults
Compactness, readability, and extensibility

Installation

pip install signxml

Synopsis

SignXML uses the ElementTree API (also supported by lxml) to work with XML data.

from signxml import xmldsig

cert = open("example.pem").read()
key = open("example.key").read()
root = ElementTree.fromstring(signature_data)
xmldsig(root).sign(key=key, cert=cert)
xmldsig(root).verify()

Verifying SAML assertions

Assuming metadata.xml contains SAML metadata for the assertion source:

from lxml import etree
from base64 import b64decode
from signxml import xmldsig

with open("metadata.xml", "rb") as fh:
    cert = etree.parse(fh).find("//ds:X509Certificate").text

root = etree.parse(b64decode(assertion)).getroot()
xmldsig(root).verify(x509_cert=cert)

See the API documentation for more.

Authors

Andrey Kislyuk

License

Licensed under the terms of the Apache License, Version 2.0.

https://travis-ci.org/kislyuk/signxml.png

https://coveralls.io/repos/kislyuk/signxml/badge.png?branch=master

https://readthedocs.org/projects/signxml/badge/?version=latest

Metadata

Release files for signxml 0.3.5

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for signxml 0.3.5
File	Size	Uploaded
signxml-0.3.5.tar.gz	129.0 kB	Dec 23, 2014	Details

Release files / signxml-0.3.5.tar.gz

Download URL	signxml-0.3.5.tar.gz
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Uploaded using Trusted Publishing? What is trusted publishing?	No

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signxml 0.3.5

SignXML: XML Signature in Python

Installation

Synopsis

Verifying SAML assertions

Authors

Links

Bugs

License

Project links

Key dates

1 maintainer

Credits

License

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Metadata

Project links

Key dates

1 maintainer

Credits

License

Classifiers

Release files for signxml 0.3.5

Source distribution (sdist)

Release files / signxml-0.3.5.tar.gz

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