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Error if encrypted group title is too long

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This commit is contained in:
Evan Hahn 2021-03-10 16:32:58 -06:00 • committed by Josh Perez
parent f07da67c60
commit b0bee86fd3
1 changed files with 9 additions and 1 deletions
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10
ts/groups.ts
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@ -233,6 +233,7 @@ type UploadedAvatarType = {
// Constants
export const MASTER_KEY_LENGTH = 32;
const GROUP_TITLE_MAX_ENCRYPTED_BYTES = 1024;
export const ID_V1_LENGTH = 16;
export const ID_LENGTH = 32;
const TEMPORAL_AUTH_REJECTED_CODE = 401;
@ -387,7 +388,14 @@ function buildGroupTitleBuffer(
const titleBlob = new window.textsecure.protobuf.GroupAttributeBlob();
titleBlob.title = title;
const titleBlobPlaintext = titleBlob.toArrayBuffer();
return encryptGroupBlob(clientZkGroupCipher, titleBlobPlaintext);
const result = encryptGroupBlob(clientZkGroupCipher, titleBlobPlaintext);
if (result.byteLength > GROUP_TITLE_MAX_ENCRYPTED_BYTES) {
throw new Error('buildGroupTitleBuffer: encrypted group title is too long');
}
return result;
}
function buildGroupProto(