Convert PKCS#12 certificate and key files to PEM

p12_to_pem.py

#!/usr/bin/env python
"""
Quick, dirty and insecure tool to extract certificate info and private key
from the PKCS#12 certicate and dump it to separate files in PEM format
(because openssl command-line tool is a mess)


Usage: p12_to_pem path/to/file.p12 password
"""
import os
import sys
from OpenSSL.crypto import load_pkcs12, dump_certificate, dump_privatekey, FILETYPE_PEM

try:
    password = sys.argv[2]
    p12_file = sys.argv[1]
except IndexError:
    raise SystemExit(__doc__)

cert_file = '%s.pem' % os.path.splitext(p12_file)[0]
key_file = '%s.key' % os.path.splitext(p12_file)[0]

p12 = load_pkcs12(open(p12_file, 'rb').read(), password)
with open(cert_file, 'wb') as fd:
    fd.write(dump_certificate(FILETYPE_PEM, p12.get_certificate()))
print cert_file

with open(key_file, 'wb') as fd:
    fd.write(dump_privatekey(FILETYPE_PEM, p12.get_privatekey()))
print key_file