signal-desktop/ts/util/uploadAttachment.ts

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// Copyright 2023 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import Long from 'long';
import type {
AttachmentWithHydratedData,
UploadedAttachmentType,
} from '../types/Attachment';
import { MIMETypeToString } from '../types/MIME';
import { padAndEncryptAttachment, getRandomBytes } from '../Crypto';
import { strictAssert } from './assert';
export async function uploadAttachment(
attachment: AttachmentWithHydratedData
): Promise<UploadedAttachmentType> {
const keys = getRandomBytes(64);
const encrypted = padAndEncryptAttachment(attachment.data, keys);
const { server } = window.textsecure;
strictAssert(server, 'WebAPI must be initialized');
const attachmentIdString = await server.putEncryptedAttachment(
encrypted.ciphertext
);
return {
cdnId: Long.fromString(attachmentIdString),
key: keys,
size: attachment.data.byteLength,
digest: encrypted.digest,
contentType: MIMETypeToString(attachment.contentType),
fileName: attachment.fileName,
flags: attachment.flags,
width: attachment.width,
height: attachment.height,
caption: attachment.caption,
blurHash: attachment.blurHash,
};
}