Stanislav Laznicka
61605d28d8
Previously, CSRs were handled as a Str parameter which brought trouble to Python 3 because of its more strict type requirements. We introduce a CertificateSigningRequest parameter which allows to use python-cryptography x509.CertificateSigningRequest to represent CSRs in the framework. https://pagure.io/freeipa/issue/7131
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
# Authors:
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# Rob Crittenden <rcritten@redhat.com>
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#
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# Copyright (C) 2010 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import print_function
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import binascii
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from cryptography.hazmat.backends import default_backend
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import cryptography.x509
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def strip_header(csr):
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"""
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Remove the header and footer (and surrounding material) from a CSR.
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"""
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headerlen = 40
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s = csr.find(b"-----BEGIN NEW CERTIFICATE REQUEST-----")
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if s == -1:
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headerlen = 36
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s = csr.find(b"-----BEGIN CERTIFICATE REQUEST-----")
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if s >= 0:
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e = csr.find(b"-----END")
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csr = csr[s + headerlen:e]
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return csr
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def load_certificate_request(data):
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"""
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Load a PEM or base64-encoded PKCS #10 certificate request.
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:return: a python-cryptography ``Certificate`` object.
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:raises: ``ValueError`` if unable to load the request
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"""
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data = strip_header(data)
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try:
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data = binascii.a2b_base64(data)
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except binascii.Error as e:
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raise ValueError(e)
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return cryptography.x509.load_der_x509_csr(data, default_backend())
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