Jakub Sztandera Kubuxu

Pre-shared Key Based Private Networks in IPFS

This document describes the first version of private networks (PN) featured in IPFS.

Only pre-shared key (PSK) functionality is available for the first implementation, as the Public Key Infrastructure approach is much more complex and requires more technical preparation.

It was implemented as an additional encryption layer before any IPFS traffic and is designed to leak the absolute minimum of information on its own. All traffic leaving the node inside a PN is encrypted, and there is no characteristic handshake.

Interface

Mathematical Analysis:

Kinga MC Inerney (duty hours: Wed. 8:15am-9:9:45
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Final additional test - 18ᵗʰ Jan

	Flat profile:

	Each sample counts as 0.01 seconds.
	% cumulative self self total
	time seconds seconds calls ms/call ms/call name
	100.06 0.04 0.04 59621 0.00 0.00 verify_sol
	0.00 0.04 0.00 100156 0.00 0.00 sort_pair
	0.00 0.04 0.00 9600 0.00 0.00 mix
	0.00 0.04 0.00 3100 0.00 0.00 check_clSetKernelArg
	0.00 0.04 0.00 1200 0.00 0.00 check_clEnqueueNDRangeKernel

	package main

	import (
	"fmt"
	"os"
	"os/exec"
	"strings"

	"github.com/google/go-github/github"
	)

	#!/usr/bin/env bash
	REMOTE_HOST=${1-"YOUR REMOTE HOST HERE"}
	DEFAULT_API_FILE="$HOME/.ipfs/api"
	API_FILE="${IPFS_PATH-$DEFAULT_API_FILE}"

	if [ -e "$API_FILE" ]; then
	echo "IPFS API is already running"
	exit 1
	fi

	dig ipfs.io +short \| xargs -L1 -i -- curl -Iv --max-time 30 {}/ipfs/QmVLRLxc9jDTkF7KLnfUr9hSrB4QjuhRjBS9bGTmPfK5Lx/
	* Trying 162.243.248.213...
	* Connected to 162.243.248.213 (162.243.248.213) port 80 (#0)
	> HEAD /ipfs/QmVLRLxc9jDTkF7KLnfUr9hSrB4QjuhRjBS9bGTmPfK5Lx/ HTTP/1.1
	> Host: 162.243.248.213
	> User-Agent: curl/7.47.1
	> Accept: /
	>
	* Operation timed out after 30001 milliseconds with 0 bytes received
	* Closing connection 0

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	cat ../ipfs.stacks\| sed -e 's/(0x.$//' -e 's/ +0x.$//' \| grep -v -e '^goroutine' \| csplit -s - '/^$/' '{*}' -f trace -n 5
	find . -type f -exec sha1sum '{}' \+ \| sort \| uniq -c --check-chars=40 \| sort -nr \| awk '{if($1 > 100) {print "\n";print $1 " times"; system("cat " $3)}}'

	#!/usr/bin/env bash

	usage() {
	echo "$0 [dir_to_publish [, target_dir_in_files_api]]"
	echo "If there are no arguments file .ipfspublish in current working directory is loaded and evaluated."
	echo "It has to assign value to PUBLIC_DIR and can assign value to TARGET_DIR."
	echo "If there is no target directory specified its value is same as public directory."
	exit 1
	}

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