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diff --git a/examples/certgen.py b/examples/certgen.py
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+++ b/examples/certgen.py
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+#
+# certgen.py
+#
+# Copyright (C) Martin Sjögren and AB Strakt 2001, All rights reserved
+#
+# $Id: certgen.py,v 1.2 2004/07/22 12:01:25 martin Exp $
+#
+"""
+Certificate generation module.
+"""
+
+from OpenSSL import crypto
+
+TYPE_RSA = crypto.TYPE_RSA
+TYPE_DSA = crypto.TYPE_DSA
+
+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
+    """
+    pkey = crypto.PKey()
+    pkey.generate_key(type, bits)
+    return pkey
+
+def createCertRequest(pkey, digest="md5", **name):
+    """
+    Create a certificate request.
+
+    Arguments: pkey   - The key to associate with the request
+               digest - Digestion method to use for signing, default is md5
+               **name - The name of the subject of the request, possible
+                        arguments are:
+                          C     - Country name
+                          ST    - State or province name
+                          L     - Locality name
+                          O     - Organization name
+                          OU    - Organizational unit name
+                          CN    - Common name
+                          emailAddress - E-mail address
+    Returns:   The certificate request in an X509Req object
+    """
+    req = crypto.X509Req()
+    subj = req.get_subject()
+
+    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"):
+    """
+    Generate a certificate given a certificate request.
+
+    Arguments: req        - Certificate reqeust to use
+               issuerCert - The certificate 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
+               digest     - Digest method to use for signing, default is md5
+    Returns:   The signed certificate in an X509 object
+    """
+    cert = crypto.X509()
+    cert.set_serial_number(serial)
+    cert.gmtime_adj_notBefore(notBefore)
+    cert.gmtime_adj_notAfter(notAfter)
+    cert.set_issuer(issuerCert.get_subject())
+    cert.set_subject(req.get_subject())
+    cert.set_pubkey(req.get_pubkey())
+    cert.sign(issuerKey, digest)
+    return cert
+