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Python script that will generate a x.509 certificate
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#!/usr/bin/env python | |
from OpenSSL import crypto | |
from os.path import exists, join | |
CERT_FILE = "myapp.crt" | |
KEY_FILE = "myapp.key" | |
def create_self_signed_cert(cert_dir): | |
""" | |
If datacard.crt and datacard.key don't exist in cert_dir, create a new | |
self-signed cert and keypair and write them into that directory. | |
""" | |
if not exists(join(cert_dir, CERT_FILE)) \ | |
or not exists(join(cert_dir, KEY_FILE)): | |
# create a key pair | |
k = crypto.PKey() | |
k.generate_key(crypto.TYPE_RSA, 1024) | |
# create a self-signed cert | |
cert = crypto.X509() | |
cert.get_subject().C = "US" | |
cert.get_subject().ST = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" | |
cert.get_subject().L = "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB" | |
cert.get_subject().O = "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC" | |
# XD | |
cert.get_subject().OU = "bunny corp" | |
cert.get_subject().CN = "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD" | |
cert.set_serial_number(1000) | |
cert.gmtime_adj_notBefore(0) | |
cert.gmtime_adj_notAfter(10 * 365 * 24 * 60 * 60) | |
cert.set_issuer(cert.get_subject()) | |
cert.set_pubkey(k) | |
cert.sign(k, 'sha256') | |
with open(join(cert_dir, CERT_FILE), "wb") as f: | |
f.write(crypto.dump_certificate(crypto.FILETYPE_PEM, cert)) | |
with open(join(cert_dir, KEY_FILE), "wb") as f: | |
f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, k)) | |
create_self_signed_cert(".") |
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