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83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
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# -*- coding: latin-1 -*-
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#
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# Copyright (C) Martin Sj<53>gren and AB Strakt 2001, All rights reserved
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# Copyright (C) Jean-Paul Calderone 2008, All rights reserved
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# This file is licenced under the GNU LESSER GENERAL PUBLIC LICENSE Version 2.1 or later (aka LGPL v2.1)
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# Please see LGPL2.1.txt for more information
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"""
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Certificate generation module.
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"""
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from OpenSSL import crypto
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import time
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TYPE_RSA = crypto.TYPE_RSA
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TYPE_DSA = crypto.TYPE_DSA
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serial = int(time.time())
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def createKeyPair(type, bits):
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"""
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Create a public/private key pair.
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Arguments: type - Key type, must be one of TYPE_RSA and TYPE_DSA
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bits - Number of bits to use in the key
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Returns: The public/private key pair in a PKey object
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"""
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pkey = crypto.PKey()
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pkey.generate_key(type, bits)
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return pkey
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def createCertRequest(pkey, digest="md5", **name):
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"""
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Create a certificate request.
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Arguments: pkey - The key to associate with the request
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digest - Digestion method to use for signing, default is md5
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**name - The name of the subject of the request, possible
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arguments are:
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C - Country name
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ST - State or province name
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L - Locality name
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O - Organization name
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OU - Organizational unit name
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CN - Common name
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emailAddress - E-mail address
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Returns: The certificate request in an X509Req object
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"""
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req = crypto.X509Req()
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subj = req.get_subject()
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for (key,value) in name.items():
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setattr(subj, key, value)
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req.set_pubkey(pkey)
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req.sign(pkey, digest)
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return req
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def createCertificate(req, (issuerCert, issuerKey), serial, (notBefore, notAfter), digest="md5"):
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"""
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Generate a certificate given a certificate request.
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Arguments: req - Certificate reqeust to use
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issuerCert - The certificate of the issuer
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issuerKey - The private key of the issuer
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serial - Serial number for the certificate
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notBefore - Timestamp (relative to now) when the certificate
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starts being valid
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notAfter - Timestamp (relative to now) when the certificate
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stops being valid
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digest - Digest method to use for signing, default is md5
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Returns: The signed certificate in an X509 object
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"""
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cert = crypto.X509()
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cert.set_serial_number(serial)
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cert.gmtime_adj_notBefore(notBefore)
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cert.gmtime_adj_notAfter(notAfter)
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cert.set_issuer(issuerCert.get_subject())
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cert.set_subject(req.get_subject())
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cert.set_pubkey(req.get_pubkey())
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cert.sign(issuerKey, digest)
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return cert
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