Create self-signed HTTPS certificates

This commit is contained in:
JonnyWong16 2016-02-13 16:08:43 -08:00
commit 9d780701f5
6 changed files with 112 additions and 40 deletions

View file

@ -1,26 +1,21 @@
# -*- coding: latin-1 -*-
#
# Copyright (C) Martin Sjögren and AB Strakt 2001, All rights reserved
# Copyright (C) Jean-Paul Calderone 2008, All rights reserved
# This file is licenced under the GNU LESSER GENERAL PUBLIC LICENSE Version 2.1 or later (aka LGPL v2.1)
# Please see LGPL2.1.txt for more information
# Copyright (C) AB Strakt
# Copyright (C) Jean-Paul Calderone
# See LICENSE for details.
"""
Certificate generation module.
"""
from OpenSSL import crypto
import time
TYPE_RSA = crypto.TYPE_RSA
TYPE_DSA = crypto.TYPE_DSA
serial = int(time.time())
def createKeyPair(type, bits):
"""
Create a public/private key pair.
Arguments: type - Key type, must be one of TYPE_RSA and TYPE_DSA
bits - Number of bits to use in the key
Returns: The public/private key pair in a PKey object
@ -29,12 +24,11 @@ def createKeyPair(type, bits):
pkey.generate_key(type, bits)
return pkey
def createCertRequest(pkey, digest="md5", **name):
def createCertRequest(pkey, digest="sha256", **name):
"""
Create a certificate request.
Arguments: pkey - The key to associate with the request
digest - Digestion method to use for signing, default is md5
digest - Digestion method to use for signing, default is sha256
**name - The name of the subject of the request, possible
arguments are:
C - Country name
@ -49,18 +43,17 @@ def createCertRequest(pkey, digest="md5", **name):
req = crypto.X509Req()
subj = req.get_subject()
for (key,value) in name.items():
for key, value in name.items():
setattr(subj, key, value)
req.set_pubkey(pkey)
req.sign(pkey, digest)
return req
def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter), digest="md5"):
def createCertificate(req, issuerCertKey, serial, validityPeriod, digest="sha256"):
"""
Generate a certificate given a certificate request.
Arguments: req - Certificate reqeust to use
Arguments: req - Certificate request to use
issuerCert - The certificate of the issuer
issuerKey - The private key of the issuer
serial - Serial number for the certificate
@ -68,9 +61,11 @@ def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter
starts being valid
notAfter - Timestamp (relative to now) when the certificate
stops being valid
digest - Digest method to use for signing, default is md5
digest - Digest method to use for signing, default is sha256
Returns: The signed certificate in an X509 object
"""
issuerCert, issuerKey = issuerCertKey
notBefore, notAfter = validityPeriod
cert = crypto.X509()
cert.set_serial_number(serial)
cert.gmtime_adj_notBefore(notBefore)
@ -80,3 +75,32 @@ def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter
cert.set_pubkey(req.get_pubkey())
cert.sign(issuerKey, digest)
return cert
def createSelfSignedCertificate((issuerName, issuerKey), serial, (notBefore, notAfter), altNames, digest="sha256"):
"""
Generate a certificate given a certificate request.
Arguments: issuerName - The name of the issuer
issuerKey - The private key of the issuer
serial - Serial number for the certificate
notBefore - Timestamp (relative to now) when the certificate
starts being valid
notAfter - Timestamp (relative to now) when the certificate
stops being valid
altNames - The alternative names
digest - Digest method to use for signing, default is sha256
Returns: The signed certificate in an X509 object
"""
cert = crypto.X509()
cert.set_version(2)
cert.set_serial_number(serial)
cert.get_subject().CN = issuerName
cert.gmtime_adj_notBefore(notBefore)
cert.gmtime_adj_notAfter(notAfter)
cert.set_issuer(cert.get_subject())
cert.set_pubkey(issuerKey)
if altNames:
cert.add_extensions([crypto.X509Extension("subjectAltName", False, altNames)])
cert.sign(issuerKey, digest)
return cert