Don't nanny the user. Allow all file types as attachments.
The Android client already has no such restrictions, and these are ineffective anyway, as they are based on the file's name, not its payload.pull/2171/head
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import { assert } from 'chai';
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import { isFileDangerous } from '../../util/isFileDangerous';
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describe('isFileDangerous', () => {
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it('returns false for images', () => {
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assert.strictEqual(isFileDangerous('dog.gif'), false);
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assert.strictEqual(isFileDangerous('cat.jpg'), false);
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});
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it('returns false for documents', () => {
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assert.strictEqual(isFileDangerous('resume.docx'), false);
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assert.strictEqual(isFileDangerous('price_list.pdf'), false);
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});
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it('returns true for executable files', () => {
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assert.strictEqual(isFileDangerous('run.exe'), true);
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assert.strictEqual(isFileDangerous('install.pif'), true);
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});
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it('returns false for empty filename', () => {
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assert.strictEqual(isFileDangerous(''), false);
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});
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it('returns false for exe at various parts of filename', () => {
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assert.strictEqual(isFileDangerous('.exemanifesto.txt'), false);
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assert.strictEqual(isFileDangerous('runexe'), false);
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assert.strictEqual(isFileDangerous('run_exe'), false);
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});
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it('returns true for upper-case EXE', () => {
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assert.strictEqual(isFileDangerous('run.EXE'), true);
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});
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});
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// tslint:disable-next-line max-line-length
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const DANGEROUS_FILE_TYPES = /\.(ADE|ADP|APK|BAT|CHM|CMD|COM|CPL|DLL|DMG|EXE|HTA|INS|ISP|JAR|JS|JSE|LIB|LNK|MDE|MSC|MSI|MSP|MST|NSH|PIF|SCR|SCT|SHB|SYS|VB|VBE|VBS|VXD|WSC|WSF|WSH|CAB)$/i;
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export function isFileDangerous(fileName: string): boolean {
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return DANGEROUS_FILE_TYPES.test(fileName);
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}
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