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Better SSH Authorized Keys Management

A seemingly common problem that people encounter is how to handle all of your users authorized_keys file.

People struggle over management, ensuring that users only have specific keys in the authorized_keys file or even a method for expiring keys. A centralized key management system could help provide all of this functionality with a little scripting.

One piece of functionality overlooked in OpenSSH is the AuthorizedKeysCommand configuration keyword. This configuration allows you to specify a command that will run during login to retrieve a users public key file from a remote source and perform validation just as if the authorized_keys file was local.

Here is an example directory structure for a set of users with SSH public keys that can be shared out via a web server:

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package main

import (
	"fmt"
	"log"
	"math/rand"
	"net/http"
	"time"

	"github.com/garyburd/redigo/redis"

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C Struct Serializer to MessagePack

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Golang 1.5 webdav readonly fileshare

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X-Macros Code Generator in C11

Because we can and the C-preprocessor is wasting CPU cycles anyway

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QEMU Cortex-m3 with semihosting

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Restic HTTP backend server

Update of https://gist.github.com/bchapuis/16d9dd0a8ae1ba80bcdd

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HTTP-SFTP file server in golang

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#include <assert.h>
#include <sys/stat.h>
#include <stdint.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char * argv[]) {

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/**
 * Author: Felipe Ferreri Tonello <eu@felipetonello.com>
 *
 * This url-shortner it only works with ASCII characters. It encodes and
 * decodes ids.
 * You can change base_x as you wish.
 *
 * It runs at least 20 times faster then a Python implementation.
 *
 * $ time python url-shortner.py -s I7