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@tmjvonboss
Forked from ril3y/create_x.509_cert.py
Last active March 6, 2018 20:24
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Python script that will generate a x.509 certificate
#!/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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