pmeulen

<?php
// Generate a secure random password in the the "Base32" alphabet

// Uses openssl secure random function for RNG generation
// Because the set of characters has 32 = 2^5 distinct values, characters can be
// easily selected, without bias (i.e. each character has the same chance 
// of being selected), by using 5 bits of randomness per character.

// Note: strlen(base32_alphabet) MUST be exactly 2^bits_per_value

pmeulen

<?php

/*
$config: php config array
$group: account name prefix
$email: A pollibly existing email addres so you can receive mail
$scope: Used as schachome, EPPN scope and names
$count: number of accounts to generate

Example: 

pmeulen

<?xml version="1.0" encoding="US-ASCII"?>
<schema targetNamespace="urn:mace:shibboleth:metadata:1.0"
    xmlns="http://www.w3.org/2001/XMLSchema"
    xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
    elementFormDefault="unqualified"
    attributeFormDefault="unqualified"
    version="1.0">
 
    <import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="xmldsig-core-schema.xsd"/>
 

pmeulen

#!/usr/bin/env python

import argparse, sys
from netaddr import IPNetwork, IPSet

class IPNetworkArg:
    def __init__(self, network):
        network.strip()
        self.add = True
        if network[0] == '-':

pmeulen

It is possible to use Dropbox as a "remote" repository. It is not perfect, updating or pushing to the remote from two location simultaniously will surely corrupt the repository. That being said it is a practical trick for syncing repositories between computers without both having write access to "origin" (i.e. github, gitlab or the like).

I store the repositories in a directory "git" in my dropbox folder. Create it if it does not yet exist, or make up you own name: mkdir ~/Dropbox/git/

1. Change to the repository for which you want to create a remote

pmeulen

<?php

/** Making opaque values like GUIDs or session identifiers easier to compare and distinguish
 *
 * By giving each opaque value a background color that is derived from the value itself, it
 * becomes much easier to eyeball whether two values are likely to be the same. This really helps
 * when reading logs or other diagnostic output that contain opaque identifiers like GUIDs or other
 * opaque identifiers.
 *
 * Testing:

pmeulen

<?php


/**
 * Encrypt $plaintext using $rsa_public_key
 *
 * To decrypt the data the RSA private that corresponds to the $rsa_public_key is required.
 *
 * Because public key crypto is not suitable for arbitrary length data, encryption is done in two steps
 * 1. Generate a random symmetric key and encrypt the plaintext with that key

pmeulen

#!/usr/bin/env bash

# Script to create and restore snapshots of the OS disk of Azure VMs

# Copyright 2018 SURFnet B.V.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#

pmeulen

#!/bin/bash

set -e

###############################################################################
# This script tries to repair a Time Machine *network* backup (i.e. an APF
# share containing a sparsebundle) that is shared over a network using e.g. an
# Apple TimeCapsule, a NAS, Raspberry PI, ...
# The script must be run on the computer that created the backup
#

pmeulen

#!/usr/bin/env python3

"""
Script to get the first EntityDescriptor from a SAML 2.0 metadata file that has a shibmd:Scope Extension with the specified
value and return the EntityDescriptor as XML.

This allows you to get an EntityDescriptor from a large metadata file by the scope of the EntityDescriptor.

The script uses XSLT to do the matching, so it can be easily modified to match on other criteria.
"""