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fixed size limit on server to include crypto overhead

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Danny Coates 2019-03-06 10:31:50 -08:00
parent dce8b6e525
commit 7f9674f494
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GPG key ID: 4C442633C62E00CB
7 changed files with 24 additions and 11 deletions
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5
app/ece.js
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@ -281,11 +281,6 @@ class StreamSlicer {
}
}
export function encryptedSize(size, rs = ECE_RECORD_SIZE) {
const chunk_meta = TAG_LENGTH + 1; // Chunk metadata, tag and delimiter
return 21 + size + chunk_meta * Math.ceil(size / (rs - chunk_meta));
}
/*
input: a ReadableStream containing data to be transformed
key: Uint8Array containing key of size KEY_LENGTH

2
app/fileSender.js
View file

@ -3,7 +3,7 @@ import OwnedFile from './ownedFile';
import Keychain from './keychain';
import { arrayToB64, bytes } from './utils';
import { uploadWs } from './api';
import { encryptedSize } from './ece';
import { encryptedSize } from './utils';
export default class FileSender extends Nanobus {
constructor() {

10
app/utils.js
View file

@ -249,6 +249,13 @@ function platform() {
return 'web';
}
const ECE_RECORD_SIZE = 1024 * 64;
const TAG_LENGTH = 16;
function encryptedSize(size, rs = ECE_RECORD_SIZE, tagLength = TAG_LENGTH) {
const chunk_meta = tagLength + 1; // Chunk metadata, tag and delimiter
return 21 + size + chunk_meta * Math.ceil(size / (rs - chunk_meta));
}
module.exports = {
fadeOut,
delay,
@ -267,5 +274,6 @@ module.exports = {
list,
secondsToL10nId,
timeLeft,
platform
platform,
encryptedSize
};