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#!/usr/bin/env python
#
# Create test certificates:
#
# ca.pem
# server.pem
# recipient.pem
# signer.pem
# x509.pem
#
from __future__ import print_function
import hashlib
import os
import os.path
import sys
import time
from M2Crypto import ASN1, EC, EVP, RSA, X509, m2, util
t = int(time.time() + time.timezone)
before = ASN1.ASN1_TIME()
before.set_time(t)
after = ASN1.ASN1_TIME()
after.set_time(t + 60 * 60 * 24 * 365 * 10) # 10 years
serial = 1
def callback(self, *args):
return ' '
def gen_identifier(cert, dig='sha256'):
instr = cert.get_pubkey().get_rsa().as_pem()
h = hashlib.new(dig)
h.update(instr)
digest = h.hexdigest().upper()
return ":".join(digest[pos: pos + 2] for pos in range(0, 40, 2))
def make_subject(cn=None, email=None):
sub = X509.X509_Name()
sub.C = 'US'
sub.ST = 'California'
sub.O = 'M2Crypto'
if cn is not None:
sub.CN = cn
else:
sub.CN = 'Heikki Toivonen'
if email is not None:
sub.Email = email
return sub
def req(name):
rsa = RSA.load_key(name + '_key.pem')
pk = EVP.PKey()
pk.assign_rsa(rsa)
reqqed = X509.Request()
reqqed.set_pubkey(pk)
reqqed.set_subject(make_subject())
reqqed.sign(pk, 'sha256')
return reqqed, pk
def save_text_pem_key(cert, name, with_key=True):
with open(name + '.pem', 'wb') as f:
for line in cert.as_text():
f.write(line.encode("ascii"))
f.write(cert.as_pem())
if with_key:
with open(name + '_key.pem', 'rb') as key_f:
for line in key_f:
f.write(line)
def issue(request, ca, capk):
global serial
pkey = request.get_pubkey()
sub = request.get_subject()
cert = X509.X509()
cert.set_version(2)
cert.set_subject(sub)
cert.set_serial_number(serial)
serial += 1
issuer = ca.get_subject()
cert.set_issuer(issuer)
cert.set_pubkey(pkey)
cert.set_not_before(before)
cert.set_not_after(after)
ext = X509.new_extension('basicConstraints', 'CA:FALSE')
cert.add_ext(ext)
ext = X509.new_extension('subjectKeyIdentifier',
gen_identifier(cert))
cert.add_ext(ext)
# auth = X509.load_cert('ca.pem')
# auth_id = auth.get_ext('subjectKeyIdentifier').get_value()
# ext = X509.new_extension('authorityKeyIdentifier', 'keyid:%s' % auth_id)
# # cert.add_ext(ext)
cert.sign(capk, 'sha256')
assert cert.verify(capk)
return cert
def mk_ca():
r, pk = req('ca')
pkey = r.get_pubkey()
sub = r.get_subject()
cert = X509.X509()
cert.set_version(2)
cert.set_subject(sub)
cert.set_serial_number(0)
issuer = X509.X509_Name()
issuer.C = sub.C
issuer.ST = sub.ST
issuer.O = sub.O
issuer.CN = sub.CN
cert.set_issuer(issuer)
cert.set_pubkey(pkey)
cert.set_not_before(before)
cert.set_not_after(after)
ext = X509.new_extension('basicConstraints', 'CA:TRUE')
cert.add_ext(ext)
ski = gen_identifier(cert)
ext = X509.new_extension('subjectKeyIdentifier', ski)
cert.add_ext(ext)
# ext = X509.new_extension('authorityKeyIdentifier', 'keyid:%s' % ski)
# cert.add_ext(ext)
cert.sign(pk, 'sha256')
save_text_pem_key(cert, 'ca')
return cert, pk
def mk_server(ca, capk):
r, _ = req('server')
r.set_subject(make_subject(cn='localhost'))
cert = issue(r, ca, capk)
save_text_pem_key(cert, 'server')
def mk_x509(ca, capk):
r, _ = req('x509')
r.set_subject(make_subject(cn='X509'))
cert = issue(r, ca, capk)
save_text_pem_key(cert, 'x509')
with open('x509.der', 'wb') as derf:
derf.write(cert.as_der())
def mk_signer(ca, capk):
r, _ = req('signer')
r.set_subject(make_subject(cn='Signer', email='signer@example.com'))
cert = issue(r, ca, capk)
save_text_pem_key(cert, 'signer', with_key=False)
def mk_recipient(ca, capk):
r, _ = req('recipient')
r.set_subject(make_subject(cn='Recipient', email='recipient@example.com'))
cert = issue(r, ca, capk)
save_text_pem_key(cert, 'recipient')
def mk_ec_pair():
priv_key = EC.gen_params(EC.NID_secp384r1)
priv_key.gen_key()
priv_key.save_key('ec.priv.pem',
callback=util.no_passphrase_callback)
pub_key = priv_key.pub()
pub_key.save_pub_key('ec.pub.pem')
if __name__ == '__main__':
names = ['ca', 'server', 'recipient', 'signer', 'x509']
os.chdir(os.path.dirname(sys.argv[0]))
for key_name in names:
genned_key = RSA.gen_key(2048, m2.RSA_F4)
genned_key.save_key('%s_key.pem' % key_name, None)
ca_bits, pk_bits = mk_ca()
mk_server(ca_bits, pk_bits)
mk_x509(ca_bits, pk_bits)
mk_signer(ca_bits, pk_bits)
mk_recipient(ca_bits, pk_bits)
# FIXME This doesn't work well.
# mk_ec_pair()
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