Add converter app
yflory
4 years ago
parent
a4bd4e2784
commit
544e5bcbfe
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@import (reference) '../../customize/src/less2/include/framework.less';
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@import (reference) '../../customize/src/less2/include/sidebar-layout.less';
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&.cp-app-convert {
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.framework_min_main(
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@bg-color: @colortheme_apps[default],
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);
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.sidebar-layout_main();
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// body
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display: flex;
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flex-flow: column;
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background-color: @cp_app-bg;
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}
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define([
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'/bower_components/tweetnacl/nacl-fast.min.js',
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], function () {
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var Nacl = window.nacl;
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//var PARANOIA = true;
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var plainChunkLength = 128 * 1024;
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var cypherChunkLength = 131088;
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var computeEncryptedSize = function (bytes, meta) {
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var metasize = Nacl.util.decodeUTF8(JSON.stringify(meta)).length;
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var chunks = Math.ceil(bytes / plainChunkLength);
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return metasize + 18 + (chunks * 16) + bytes;
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};
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var encodePrefix = function (p) {
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return [
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65280, // 255 << 8
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255,
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].map(function (n, i) {
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return (p & n) >> ((1 - i) * 8);
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});
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};
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var decodePrefix = function (A) {
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return (A[0] << 8) | A[1];
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};
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var slice = function (A) {
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return Array.prototype.slice.call(A);
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};
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var createNonce = function () {
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return new Uint8Array(new Array(24).fill(0));
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};
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var increment = function (N) {
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var l = N.length;
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while (l-- > 1) {
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/* our linter suspects this is unsafe because we lack types
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but as long as this is only used on nonces, it should be safe */
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if (N[l] !== 255) { return void N[l]++; } // jshint ignore:line
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if (l === 0) { throw new Error('E_NONCE_TOO_LARGE'); }
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N[l] = 0;
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}
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};
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var joinChunks = function (chunks) {
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return new Blob(chunks);
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};
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var decrypt = function (u8, key, done, progress) {
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var MAX = u8.length;
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var _progress = function (offset) {
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if (typeof(progress) !== 'function') { return; }
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progress(Math.min(1, offset / MAX));
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};
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var nonce = createNonce();
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var i = 0;
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var prefix = u8.subarray(0, 2);
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var metadataLength = decodePrefix(prefix);
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var res = {
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metadata: undefined,
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};
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var cancelled = false;
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var cancel = function () {
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cancelled = true;
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};
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var metaBox = new Uint8Array(u8.subarray(2, 2 + metadataLength));
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var metaChunk = Nacl.secretbox.open(metaBox, nonce, key);
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increment(nonce);
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try {
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res.metadata = JSON.parse(Nacl.util.encodeUTF8(metaChunk));
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} catch (e) {
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return window.setTimeout(function () {
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done('E_METADATA_DECRYPTION');
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});
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}
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if (!res.metadata) {
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return void setTimeout(function () {
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done('NO_METADATA');
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});
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}
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var takeChunk = function (cb) {
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setTimeout(function () {
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var start = i * cypherChunkLength + 2 + metadataLength;
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var end = start + cypherChunkLength;
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i++;
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var box = new Uint8Array(u8.subarray(start, end));
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// decrypt the chunk
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var plaintext = Nacl.secretbox.open(box, nonce, key);
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increment(nonce);
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if (!plaintext) { return cb('DECRYPTION_ERROR'); }
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_progress(end);
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cb(void 0, plaintext);
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});
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};
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var chunks = [];
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var again = function () {
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if (cancelled) { return; }
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takeChunk(function (e, plaintext) {
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if (e) {
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return setTimeout(function () {
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done(e);
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});
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}
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if (plaintext) {
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if ((2 + metadataLength + i * cypherChunkLength) < u8.length) { // not done
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chunks.push(plaintext);
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return setTimeout(again);
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}
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chunks.push(plaintext);
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res.content = joinChunks(chunks);
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return done(void 0, res);
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}
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done('UNEXPECTED_ENDING');
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});
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};
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again();
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return {
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cancel: cancel
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};
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};
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// metadata
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/* { filename: 'raccoon.jpg', type: 'image/jpeg' } */
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var encrypt = function (u8, metadata, key) {
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var nonce = createNonce();
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// encode metadata
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var plaintext = Nacl.util.decodeUTF8(JSON.stringify(metadata));
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// if metadata is too large, drop the thumbnail.
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if (plaintext.length > 65535) {
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var temp = JSON.parse(JSON.stringify(metadata));
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delete metadata.thumbnail;
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plaintext = Nacl.util.decodeUTF8(JSON.stringify(temp));
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}
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var i = 0;
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var state = 0;
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var next = function (cb) {
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if (state === 2) { return void setTimeout(cb); }
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var start;
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var end;
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var part;
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var box;
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if (state === 0) { // metadata...
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part = new Uint8Array(plaintext);
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box = Nacl.secretbox(part, nonce, key);
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increment(nonce);
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if (box.length > 65535) {
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return void cb('METADATA_TOO_LARGE');
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}
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var prefixed = new Uint8Array(encodePrefix(box.length)
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.concat(slice(box)));
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state++;
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return void setTimeout(function () {
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cb(void 0, prefixed);
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});
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}
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// encrypt the rest of the file...
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start = i * plainChunkLength;
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end = start + plainChunkLength;
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part = u8.subarray(start, end);
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box = Nacl.secretbox(part, nonce, key);
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increment(nonce);
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i++;
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// regular data is done
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if (i * plainChunkLength >= u8.length) { state = 2; }
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setTimeout(function () {
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cb(void 0, box);
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});
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};
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return next;
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};
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return {
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decrypt: decrypt,
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encrypt: encrypt,
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joinChunks: joinChunks,
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computeEncryptedSize: computeEncryptedSize,
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};
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});
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@ -0,0 +1,12 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>CryptPad</title>
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<meta content="text/html; charset=utf-8" http-equiv="content-type"/>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="referrer" content="no-referrer" />
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<script async data-bootload="main.js" data-main="/common/boot.js?ver=1.0" src="/bower_components/requirejs/require.js?ver=2.3.5"></script>
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<link href="/customize/src/outer.css?ver=1.3.2" rel="stylesheet" type="text/css">
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</head>
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<body>
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<iframe-placeholder>
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<!DOCTYPE html>
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<html class="cp-app-noscroll">
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<head>
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<meta content="text/html; charset=utf-8" http-equiv="content-type"/>
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<script async data-bootload="/convert/inner.js" data-main="/common/sframe-boot.js?ver=1.7" src="/bower_components/requirejs/require.js?ver=2.3.5"></script>
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<style>
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.loading-hidden { display: none; }
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</style>
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</head>
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<body class="cp-app-convert">
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<div id="cp-toolbar" class="cp-toolbar-container"></div>
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<div id="cp-sidebarlayout-container"></div>
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<noscript>
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<p><strong>OOPS</strong> In order to do encryption in your browser, Javascript is really <strong>really</strong> required.</p>
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<p><strong>OUPS</strong> Afin de pouvoir réaliser le chiffrement dans votre navigateur, Javascript est <strong>vraiment</strong> nécessaire.</p>
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</noscript>
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</body>
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