Kieran/void.cat
Kieran/void.cat
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Hash file with sjcl (>2Gb filesize)

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This commit is contained in:
Kieran 2022-09-11 22:26:35 +01:00
parent 78c2b560b9
commit ba61037e42
Signed by: Kieran
GPG Key ID: DE71CEB3925BE941
2 changed files with 16 additions and 4 deletions
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1
VoidCat/spa/.env
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@ -1,2 +1,3 @@
BROWSER=none
HTTPS=true
API_HOST=https://localhost:7195

17
VoidCat/spa/src/Components/FileUpload/FileUpload.js
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@ -7,6 +7,8 @@ import {ApiHost} from "../Shared/Const";
import {StreamEncryption} from "../Shared/StreamEncryption";
import {VoidButton} from "../Shared/VoidButton";
import {useFileTransfer} from "../Shared/FileTransferHook";
import sjcl from "sjcl";
import {sjclcodec} from "../../codecBytes";
const UploadState = {
NotStarted: 0,
@ -99,7 +101,7 @@ export function FileUpload(props) {
if (auth) {
headers["Authorization"] = `Bearer ${auth}`;
}
let req = await fetch("/upload", {
let req = await fetch(`${ApiHost}/upload`, {
method: "POST",
mode: "cors",
body: rs,
@ -212,8 +214,17 @@ export function FileUpload(props) {
}
async function digest(file) {
let h = await window.crypto.subtle.digest(DigestAlgo, await file.arrayBuffer());
return buf2hex(new Uint8Array(h));
const ChunkSize = 1024 * 1024;
// must compute hash in chunks, subtle crypto cannot hash files > 2Gb
let sha = new sjcl.hash.sha256();
for (let x = 0; x < Math.ceil(file.size / ChunkSize); x++) {
let offset = x * ChunkSize;
let slice = file.slice(offset, offset + ChunkSize);
let chunk = await slice.arrayBuffer();
sha.update(sjclcodec.toBits(new Uint8Array(chunk)));
update(chunk.byteLength);
}
return buf2hex(sjclcodec.fromBits(sha.finalize()));
}
function renderStatus() {