3e:null 3f:["$","title",null,{"children":"VICTOR LEPEILLET Enigma Simulation | Victor Le Peillet | Observable"}] 45:T33b8,chart = { const svg = d3 .create("svg") .attr("width", w) .attr("height", w); let plugboardstr = "AB HK ZG KX VW JM OQ FY UD RN"; let speed = 1; let labels = html``; let reflectorSettings = html``; let plugboardSettings = html``; let speedForm = html``; speedForm.addEventListener("input", e => { speed = e.target.valueAsNumber; }); let rotorSettings = html``; let value = " BELDKWNAUU"; let input = html`

Input

`; input.addEventListener("input", e => { value = e.target.value; }); let i = input.querySelector("#in"); let output = html`

Output

`; let o = output.querySelector("#out"); let go = html` `; let ui = html`

VICTOR LEPEILLET Enigma Simulation

${labels}Labels

${rotorSettings} ${reflectorSettings} ${plugboardSettings} ${speedForm} ${input} ${go} ${output}

VICTOR LE PEILLET 4B Beranger

${svg.node()}

`; yield ui; const g = svg.append("g").attr("transform", `translate(${w / 2}, ${w / 2})`); const topG = svg .append("g") .attr("transform", `translate(${w / 2}, ${w / 2})`); const defs = svg.append("defs"); // Configurable let reflector = new Reflector(REFLECTORS[0].value); let reflectorLinks = makeReflectorLinks(reflector); let rotorValues = [0, 1, 2].map(r => ROTORS[r].value); let plugboard, rotors = [], linkData; function setRotors() { plugboard = new Plugboard(plugboardstr); rotors = []; let index = 0; for (let val of rotorValues) { rotors.push(new Rotor(...parseRotorStr(val, 1), "A", "A")); } rotors.reverse(); for (let i = 0; i < rotors.length; i++) rotors[i].index = i; linkData = [plugboard] .concat(rotors) .map((rotor, i) => rotorLinks(rotor, d3.interpolateNumber(radii[i], radii[i + 1])) ); } setRotors(); plugboardSettings.addEventListener("input", e => { const value = e.target.value; if (validatePlugboard(value)) { e.target.style.backgroundColor = "white"; plugboardstr = value; } else { e.target.style.backgroundColor = "red"; } setRotors(); updateRotors(); }); const line = d3 .line() .x(d => d.x) .y(d => d.y); let rotorGroups; function updateRotors() { g.selectAll("g.rotor").remove(); rotorGroups = g .selectAll("g.rotor") .data(rotors.concat(plugboard), (r, i) => { return i; }) .join(enter => { let g = enter .append("g") .attr("class", "rotor") .attr("opacity", 0.4); g.selectAll("g.link") .data((d, i) => linkData[i], d => d.source) .join(enter => { let g = enter.append("g").attr("class", "link"); g.append("path") .attr("class", "halo") .attr("stroke", d => "#fff") .attr("stroke-width", 3) .attr("fill", "none") .attr("d", d => line(d.points)); g.append("path") .attr("class", "link") .attr("stroke", "#000") .attr("stroke-width", 1) .attr("fill", "none") .attr("d", d => line(d.points)); return g; }); return g; }); } updateRotors(); rotorSettings.addEventListener("change", e => { let value = e.target.value; let rotor = e.target.dataset.rotor; rotorValues[rotor] = value; setRotors(); updateRotors(); }); reflectorSettings.addEventListener("change", e => { let value = e.target.value; reflector = new Reflector(value); reflectorLinks = makeReflectorLinks(reflector); rLinks .data(reflectorLinks, d => d.source) .join( enter => {}, update => { update .select("path.halo") .transition() .delay((d, i) => i * 20) .attr("d", d => d.d); update .select("path.line") .transition() .delay((d, i) => i * 20) .attr("d", d => d.d); } ); }); let rLinks = g .selectAll("g.reflector-link") .data(reflectorLinks, d => d.source) .join(enter => { let g = enter .append("g") .attr("class", "reflector-link") .attr("opacity", 0.4); g.append("path") .attr("d", d => d.d) .attr("fill", "none") .attr("stroke", "#fff") .attr("class", "halo") .attr("stroke-width", 2); g.append("path") .attr("d", d => d.d) .attr("class", "line") .attr("fill", "none") .attr("stroke", "#000") .attr("stroke-width", 1); return g; }); reflectorSettings.addEventListener("change", e => { let value = e.target.value; reflector = new Reflector(value); reflectorLinks = makeReflectorLinks(reflector); rLinks .data(reflectorLinks, d => d.source) .join( enter => {}, update => { update .select("path.halo") .transition() .delay((d, i) => i * 20) .attr("d", d => d.d); update .select("path.line") .transition() .delay((d, i) => i * 20) .attr("d", d => d.d); } ); }); let borderCircles = g .selectAll("circle.border") .data(radii) .join("circle") .attr("class", "border") .attr("r", d => d) .attr("stroke", (d, i) => (i == 0 ? "#000" : "#888")) .attr("stroke-width", 1.5) .attr("fill", "none"); const ids = [0, 1, 2, 3, 4].map(i => DOM.uid(`ring-${i}`)); let ringLabels = topG .selectAll("g.label") .data(radii) .join(enter => { let g = enter .append("g") .attr("class", "label") .attr( "transform", (d, i) => `translate(0, ${-(radii[i] + radii[i + 1]) / 2})` ); g.append("rect") .attr("height", 25) .attr("transform", "translate(-10, -14)") .attr("width", w / 6); g.append("text") .attr("fill", "#fff") .style("font-size", "1.7vw") .attr("alignment-baseline", "middle") .attr("font-weight", "bold") .text((d, i) => { return i === 0 ? "Plugboard" : i === 4 ? `Reflector` : `Rotor ${i}`; }); return g; }) .attr("opacity", 0); let inputDots = topG .selectAll("g.input") .data(d3.range(0, 26)) .join(enter => { let g = enter.append("g").attr( "transform", i => `translate( ${Math.cos(Math.PI * 2 * (i / 26)) * radii[0]}, ${Math.sin(Math.PI * 2 * (i / 26)) * radii[0]})` ); g.append("circle") .attr("class", "input") .attr("r", 10) .attr("fill", "#fff") .attr("stroke", "#000"); g.append("text") .text(d => LETTERS[d]) .style("font-family", "IBM Plex Mono") .style("font-size", "2vw") .attr("text-anchor", "middle") .attr("alignment-baseline", "middle") .attr( "transform", i => `translate( ${Math.cos(Math.PI * 2 * (i / 26)) * 20}, ${Math.sin(Math.PI * 2 * (i / 26)) * 20})` ); return g; }); const dot = topG .append("circle") .attr("class", "focus") .attr("r", 7) .attr("fill", "#da1e28") .attr("opacity", 0); labels.addEventListener("change", e => { if (e.target.checked) { ringLabels.transition().attr("opacity", 1); } else { ringLabels.transition().attr("opacity", 0); } }); while (true) { await new Promise(resolve => go.addEventListener("click", e => { o.innerHTML = " "; go.style.background = "#aaa"; go.disabled = true; i.disabled = true; resolve(); }) ); const { steps, result } = encrypt(value, rotors, reflector, plugboard); let link = 0; let frame = 0; for (let { type, ...step } of steps) { switch (type) { case THROUGH_ROTOR: { rotorGroups .transition() .attr("opacity", (d, i) => (i === step.rotor + 1 ? 1 : 0.2)); let { points, dest, rotor } = linkData[step.rotor + 1].find( l => l.source === step.source ); for (let pos of points) { dot.attr( "transform", `rotate(${-(360 * (step.pos / 26)).toFixed(5)}) translate(${pos.x}, ${pos.y})` ); if (++frame % speed === 0) yield ui; } break; } case ROTOR_STEP: { await rotorGroups .filter((d, i) => i - 1 === step.rotor) .transition() .duration(2000 / speed) .attr("transform", (d, i) => { return `rotate(${-(360 * (step.pos / 26)).toFixed(5)})`; }) .end(); break; } case BACK_THROUGH_ROTOR: { rotorGroups .transition() .attr("opacity", (d, i) => (i === step.rotor + 1 ? 1 : 0.2)); let { points, rotor, dest } = linkData[step.rotor + 1].find( l => l.source === step.source ); for (let pos of points.slice().reverse()) { dot.attr( "transform", `rotate(${-(360 * (step.pos / 26)).toFixed(5)}) translate(${pos.x}, ${pos.y})` ); if (++frame % speed === 0) yield ui; } break; } case THROUGH_REFLECTOR: { rotorGroups.transition().attr("opacity", 0.2); rLinks.transition().attr("opacity", 1); let r = reflectorLinks.find(r => r.target === step.dest); for (let pos of r.points.slice().reverse()) { dot.attr("transform", `translate(${pos.x}, ${pos.y})`); if (++frame % speed === 0) yield ui; } rLinks.transition().attr("opacity", 0.2); break; } case THROUGH_PLUGBOARD: { rotorGroups .transition() .attr("opacity", (d, i) => (i === 0 ? 9 : 0.2)); console.log(linkData[0]); let r = linkData[0].find(l => l.source === step.wire); dot.attr("opacity", 1); for (let pos of r.points) { dot.attr("transform", `translate(${pos.x}, ${pos.y})`); if (++frame % speed === 0) yield ui; } break; } case BACK_THROUGH_PLUGBOARD: { rotorGroups .transition() .attr("opacity", (d, i) => (i === 0 ? 1 : 0.2)); let r = linkData[0][step.wire]; for (let pos of r.points.slice().reverse()) { dot.attr("transform", `translate(${pos.x}, ${pos.y})`); if (++frame % speed === 0) yield ui; } o.innerText = o.innerText += step.output; break; } } yield ui; } go.style.background = "#000"; go.disabled = false; i.disabled = false; } //yield run(); }46:T7dc,function encrypt(input, rotors, reflector, plugboard) { const rotorsRev = [].concat(rotors).reverse(); const message = ""; let result = ""; const letter = ""; let steps = []; const step = () => { const [r0, r1] = rotors; r0.step(); steps.push({ type: ROTOR_STEP, rotor: 0, pos: r0.pos }); // The second test here is the double-stepping anomaly if (r0.steps.has(r0.pos) || r1.steps.has(mod(r1.pos + 1, 26))) { r1.step(); steps.push({ type: ROTOR_STEP, rotor: 1, pos: r1.pos }); if (r1.steps.has(r1.pos)) { const r2 = rotors[2]; r2.step(); steps.push({ type: ROTOR_STEP, rotor: 2, pos: r2.pos }); } } }; let log = ""; for (const c of input) { let letter = a2i(c, true); if (letter === -1) { result += c; continue; } step(); log += `before(${letter}) `; steps.push({ type: THROUGH_PLUGBOARD, wire: letter }); letter = plugboard.transform(letter); for (let i = 0; i < rotors.length; i++) { steps.push({ type: THROUGH_ROTOR, rotor: i, pos: rotors[i].pos, source: rotors[i].getWire(letter) }); letter = rotors[i].transform(letter); } steps.push({ type: THROUGH_REFLECTOR, rotor: letter, dest: letter }); letter = reflector.transform(letter); for (let i = rotors.length - 1; i >= 0; i--) { letter = rotors[i].revTransform(letter); steps.push({ type: BACK_THROUGH_ROTOR, rotor: i, pos: rotors[i].pos, source: rotors[i].getWire(letter) }); } steps.push({ type: BACK_THROUGH_PLUGBOARD, wire: plugboard.transform(letter), output: i2a(plugboard.transform(letter)) }); letter = plugboard.transform(letter); log += ` = ${i2a(letter)}`; result += i2a(letter); } return { steps, result: result }; }47:T499,class Rotor { constructor(wiring, steps, ringSetting, initialPosition, name) { this.name = name; this.map = new Array(26); this.revMap = new Array(26); const uniq = {}; for (let i = 0; i < LETTERS.length; i++) { const a = a2i(LETTERS[i]); const b = a2i(wiring[i]); this.map[a] = b; this.revMap[b] = a; uniq[b] = true; } if (Object.keys(uniq).length !== LETTERS.length) { throw new Error("Rotor wiring must have each letter exactly once"); } const rs = a2i(ringSetting); this.steps = new Set(); for (const x of steps) { this.steps.add(mod(a2i(x) - rs, 26)); } if (this.steps.size !== steps.length) { // This isn't strictly fatal, but it's probably a mistake throw new Error("Rotor steps must be unique"); } this.pos = mod(a2i(initialPosition) - rs, 26); } step() { this.pos = mod(this.pos + 1, 26); return this.pos; } transform(c) { return mod(this.map[mod(c + this.pos, 26)] - this.pos, 26); } getWire(c) { return mod(c + this.pos, 26); } revTransform(c) { return mod(this.revMap[mod(c + this.pos, 26)] - this.pos, 26); } }48:[] 43:{"id":"53520064bca4ee10","slug":"victor-lepeillet-enigma-simulation","title":"VICTOR LEPEILLET Enigma Simulation","thumbnail":"c1c8d1926ec50cab5b9f271d8e8f5a7496752037a2e705484fbbda570b51564b","access_level":"public","create_time":"$D2019-10-16T20:05:30.365Z","update_time":"$D2019-10-17T15:04:33.945Z","view_time":null,"first_public_time":"$D2019-10-16T21:12:57.769Z","has_unpublished_edits":null,"fork":{"id":"7116e6f347bf3540","slug":"enigma-machine","title":"Enigma machine","owner":{"id":"b47c3705cfcd7c1b","login":"tmcw","name":"Tom MacWright"}},"stars":2,"starred":false,"owner":{"type":"team","id":"79ac9a7911157423","login":"victorlp","name":"Victor Le 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r,\n y: Math.sin(a) * r\n };\n });\n return {\n rotor,\n source: t,\n dest: r,\n points\n };\n });\n\n return d;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":534,"value":"makeReflectorLinks = reflector => {\n return Array.from(reflector.map.entries(), ([s, t]) => {\n let source = (+s / 26) * Math.PI * 2;\n let target = (t / 26) * Math.PI * 2;\n let r = radii[radii.length - 1];\n let sx0 = r * Math.cos(source);\n let sy0 = r * Math.sin(source);\n let tx0 = r * Math.cos(target);\n let ty0 = r * Math.sin(target);\n let context = d3.path();\n context.moveTo(sx0, sy0);\n context.quadraticCurveTo(0, 0, r * Math.cos(target), r * Math.sin(target));\n\n let p = d3\n .create(\"svg:path\")\n .attr(\"d\", context)\n .node();\n\n let len = p.getTotalLength();\n\n let points = d3\n .range(0, len, len / 30)\n .map(at => p.getPointAtLength(at))\n .map(pt => ({ x: pt.x, y: pt.y }));\n\n return {\n source: +s,\n target: t,\n points,\n d: context.toString()\n };\n });\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":3470,"value":"function validatePlugboard(pairs) {\n const map = {};\n for (let pair of pairs.split(/\\s+/)) {\n if (!/^[A-Z]{2}$/.test(pair)) {\n return false;\n }\n const a = a2i(pair[0]),\n b = a2i(pair[1]);\n if (a === b) {\n // self-stecker\n return;\n }\n if (Object.prototype.hasOwnProperty.call(map, a)) {\n return false;\n }\n if (Object.prototype.hasOwnProperty.call(map, b)) {\n return false;\n }\n map[a] = b;\n map[b] = a;\n }\n return true;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1776,"value":"$46","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1774,"value":"$47","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1781,"value":"class PairMapBase {\n constructor(pairs) {\n this.pairs = pairs;\n this.map = new Map();\n if (pairs === \"\") return;\n pairs.split(/\\s+/).forEach(pair => {\n const a = a2i(pair[0]),\n b = a2i(pair[1]);\n if (a !== b) {\n this.map.set(a, b);\n this.map.set(b, a);\n }\n });\n }\n transform(c) {\n return this.map.has(c) ? this.map.get(c) : c;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1779,"value":"class Reflector extends PairMapBase {\n constructor(pairs) {\n super(pairs);\n const s = this.map.size;\n if (s !== 26) {\n throw new Error(\n \"Reflector must have exactly 13 pairs covering every letter\"\n );\n }\n const optMap = new Map(Array.from({ length: 26 }, (_, i) => [i, i]));\n for (const x of this.map.keys()) {\n optMap.set(x, this.map.get(x));\n }\n this.map = optMap;\n }\n transform(c) {\n return this.map.get(c);\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1777,"value":"class Plugboard extends PairMapBase {\n constructor(pairs) {\n super(pairs, \"Plugboard\");\n\n let m = Array.from({ length: 26 }, (_, i) => i);\n let mapped = new Set();\n let prs = [];\n let map = [];\n here: for (let swap of this.map.entries()) {\n let [a, b] = Array.from(swap);\n m[a] = b;\n m[b] = a;\n for (let s of swap) {\n if (mapped.has(s)) {\n continue here;\n }\n mapped.add(s);\n }\n prs.push(new Set(swap));\n }\n this.m = m;\n this.pairs = prs;\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2306,"value":"THROUGH_ROTOR = Symbol(\"THROUGH_ROTOR\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2309,"value":"BACK_THROUGH_ROTOR = Symbol(\"BACK_THROUGH_ROTOR\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2382,"value":"THROUGH_REFLECTOR = Symbol(\"THROUGH_REFLECTOR\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2703,"value":"THROUGH_PLUGBOARD = Symbol(\"THROUGH_PLUGBOARD\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2732,"value":"BACK_THROUGH_PLUGBOARD = Symbol(\"BACK_THROUGH_PLUGBOARD\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2468,"value":"ROTOR_STEP = Symbol(\"ROTOR_STEP\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":3495,"value":"w = mobile ? width : width * 0.8","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":3499,"value":"mobile = width < 640","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1789,"value":"import {checkbox, select} from \"@jashkenas/inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1787,"value":"import {submit} from \"@mbostock/more-deliberate-inputs\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1785,"value":"import {REFLECTORS, ROTORS_FOURTH, ROTORS, LETTERS} from \"@tmcw/enigma-constants\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1784,"value":"import {mod, i2a, a2i, parseRotorStr} from \"@tmcw/enigma-cyberchef-utils\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":1956,"value":"html``","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"d3 = require(\"d3\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W48","stdlib":"1"}} 44:"$43:body"