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In the dogtag-ipa-ca-renew-agent-submit certmonger renewal helper, we currently use our hand-rolled PKCS #10 pyasn1 specification to parse the friendlyName out of CSRs generated by certmonger (it contains the NSSDB nickname of the cert). Use other information from the renewal helper process environment to determine the nickname and remove our PKCS #10 pyasn1 spec. Part of: https://fedorahosted.org/freeipa/ticket/6398 Reviewed-By: Jan Cholasta <jcholast@redhat.com> Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
67 lines
1.9 KiB
Python
67 lines
1.9 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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import sys
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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 from a CSR.
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"""
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headerlen = 40
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s = csr.find("-----BEGIN NEW CERTIFICATE REQUEST-----")
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if s == -1:
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headerlen = 36
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s = csr.find("-----BEGIN CERTIFICATE REQUEST-----")
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if s >= 0:
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e = csr.find("-----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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if __name__ == '__main__':
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# Read PEM request from stdin and print out its components
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csrlines = sys.stdin.readlines()
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csr = ''.join(csrlines)
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print(load_certificate_request(csr))
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