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+++ This bug was initially created as a clone of Bug #796293 +++
Description of problem:
I have a CA cert and I'm trying to pick out its constraints and parsing it is failing in python-nss with:
$ python ~rcrit/python_nss/doc/examples/cert_dump.py /etc/ipa/ca.crt
Traceback (most recent call last):
File "/home/rcrit/cert_dump.py", line 183, in <module>
print_extension(2, extension)
File "/home/rcrit/cert_dump.py", line 101, in print_extension
bc = nss.BasicConstraints(extension.value)
nss.error.NSPRError: [Errno -8183] (SEC_ERROR_BAD_DER) security library: improperly formatted DER-encoded message.: 'cannot decode Basic Constraints'
Version-Release number of selected component (if applicable):
python-nss-0.12-1.fc16.x86_64
--- Additional comment from rcritten on 2012-02-22 11:08:09 EST ---
Created attachment 565031[details]
The failing CA PEM file
Fails differently in RHEL 6.2, may be due to older version in RHEL.
$ python cert_dump.py /etc/ipa/ca.crt
certificate filename=/etc/ipa/ca.crt
Certificate:
Data:
Version: 3 (0x2)
Serial Number: 1000 (0x3e8)
Signature Algorithm:
Traceback (most recent call last):
File "cert_dump.py", line 171, in <module>
print nss.indented_format(cert.signature_algorithm.format_lines(3))
AttributeError: 'nss.nss.SignatureAlgorithm' object has no attribute 'format_lines'
The format specifier for PyArg_ParseTupleAndKeywords in BasicConstraints_init()
was wrong, instead of "O|i" it should have been "O!", looks like it was a
cut-n-paste bug.
< if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|i:BasicConstraints",
kwlist,
---
> if (!PyArg_ParseTupleAndKeywords(args, kwds, "O!:BasicConstraints", kwlist,
As for SignatureAlgorithm not having a format_lines method, that's due to version skew between the example code and the library, that was a change between 0.11 and 0.12, RHEL6 is still back at 0.11. That difference will not affect your use of
BasicConstaints.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
http://rhn.redhat.com/errata/RHBA-2013-0405.html