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Implemented multi-file upload/download

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Danny Coates 2018-07-25 22:26:11 -07:00
parent b2aed06328
commit 7bf104960e
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GPG key ID: 4C442633C62E00CB
18 changed files with 475 additions and 183 deletions
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71
app/ece.js
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@ -1,5 +1,4 @@
import 'buffer';
import BlobSlicer from './blobSlicer';
import { transformStream } from './streams';
const NONCE_LENGTH = 12;
@ -7,7 +6,7 @@ const TAG_LENGTH = 16;
const KEY_LENGTH = 16;
const MODE_ENCRYPT = 'encrypt';
const MODE_DECRYPT = 'decrypt';
const RS = 1024 * 64;
export const ECE_RECORD_SIZE = 1024 * 64;
const encoder = new TextEncoder();
@ -282,52 +281,34 @@ class StreamSlicer {
}
}
export function encryptedSize(size, rs = ECE_RECORD_SIZE) {
return 21 + size + 16 * Math.floor(size / (rs - 17));
}
/*
input: a blob or a ReadableStream containing data to be transformed
input: a ReadableStream containing data to be transformed
key: Uint8Array containing key of size KEY_LENGTH
mode: string, either 'encrypt' or 'decrypt'
rs: int containing record size, optional
salt: ArrayBuffer containing salt of KEY_LENGTH length, optional
*/
export default class ECE {
constructor(input, key, mode, rs, salt) {
this.input = input;
this.key = key;
this.mode = mode;
this.rs = rs;
this.salt = salt;
if (rs === undefined) {
this.rs = RS;
}
if (salt === undefined) {
this.salt = generateSalt(KEY_LENGTH);
}
}
info() {
return {
recordSize: this.rs,
fileSize:
21 + this.input.size + 16 * Math.floor(this.input.size / (this.rs - 17))
};
}
transform() {
let inputStream;
if (this.input instanceof Blob) {
inputStream = new ReadableStream(
new BlobSlicer(this.input, this.rs - 17)
);
} else {
inputStream = transformStream(
this.input,
new StreamSlicer(this.rs, this.mode)
);
}
return transformStream(
inputStream,
new ECETransformer(this.mode, this.key, this.rs, this.salt)
);
}
export function encryptStream(
input,
key,
rs = ECE_RECORD_SIZE,
salt = generateSalt(KEY_LENGTH)
) {
const mode = 'encrypt';
const inputStream = transformStream(input, new StreamSlicer(rs, mode));
return transformStream(inputStream, new ECETransformer(mode, key, rs, salt));
}
/*
input: a ReadableStream containing data to be transformed
key: Uint8Array containing key of size KEY_LENGTH
rs: int containing record size, optional
*/
export function decryptStream(input, key, rs = ECE_RECORD_SIZE) {
const mode = 'decrypt';
const inputStream = transformStream(input, new StreamSlicer(rs, mode));
return transformStream(inputStream, new ECETransformer(mode, key, rs));
}