jtdowney

This gist describes how to use the ImageMagick and OpenSSL command line tools to encrypt an image using ECB mode.

First we need to gather some information about the original image. This will tell us what size to use in our final step.

$ identify Braintree.png
Braintree.png PNG 898x229 898x229+0+0 8-bit sRGB 65KB 0.000u 0:00.000

Looks like the image is 898x229.

Next we need to convert the image into the RGBA format. This is a simple binary format that only contains uncompressed pixel data and no meta information, like image dimensions.

jtdowney

# i3 config file (v4)

set $mod Mod4
font pango:Hack 10
floating_modifier $mod
focus_follows_mouse no

bindsym $mod+Return exec i3-sensible-terminal
bindsym $mod+Shift+q kill
bindsym $mod+d exec dmenu_run

jtdowney

FROM debian:stretch-slim

ENV OPENJDK_MAJOR=11
ENV OPENJDK_VERSION=11.0.1
ENV JAVA_HOME=/opt/jdk-${OPENJDK_VERSION}
ENV PATH=$JAVA_HOME/bin:$PATH

ADD https://download.java.net/java/GA/jdk${OPENJDK_MAJOR}/13/GPL/openjdk-${OPENJDK_VERSION}_linux-x64_bin.tar.gz /tmp/
RUN tar -C /opt -xf /tmp/openjdk-${OPENJDK_VERSION}_linux-x64_bin.tar.gz

jtdowney

#[macro_use]
extern crate error_chain;
extern crate regex;

mod errors {
    error_chain! {
        foreign_links {
            Io(::std::io::Error);
            Regex(::regex::Error);
            ParseChar(::std::char::ParseCharError);

jtdowney

#[macro_use]
extern crate error_chain;

mod errors {
    error_chain! {
        foreign_links {
            Io(::std::io::Error);
            ParseInt(::std::num::ParseIntError);
        }
    }

jtdowney

#[macro_use]
extern crate error_chain;

mod errors {
    error_chain! {
        foreign_links {
            Io(::std::io::Error);
            ParseInt(::std::num::ParseIntError);
        }
    }

jtdowney

#[macro_use]
extern crate itertools;

use std::collections::HashMap;
use std::env;
use std::fs::File;
use std::io::{BufRead, BufReader};

#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct Point(isize, isize);

jtdowney

#[macro_use]
extern crate error_chain;

mod errors {
    error_chain! {
        foreign_links {
            Io(::std::io::Error);
        }
    }
}

jtdowney

#[macro_use]
extern crate error_chain;

mod errors {
    error_chain! {
        foreign_links {
            Io(::std::io::Error);
            ParseInt(::std::num::ParseIntError);
        }
    }

jtdowney

use std::env;
use std::fs::File;
use std::io::{BufRead, BufReader};

#[derive(Copy, Clone, Debug)]
enum Direction {
    Up,
    Down,
    Left,
    Right,