Language: JavaScript
Label: vulnerable
CWE: CWE-331 \u2014 Insufficient Entropy
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.

Code:
        WebCryptography.prototype.decryptFile = function (key, file, File) {
            return __awaiter(this, void 0, void 0, function () {
                var bKey, abCipherdata, abPlaindata;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0: return [4 /*yield*/, this.getKey(key)];
                        case 1:
                            bKey = _a.sent();
                            return [4 /*yield*/, file.toArrayBuffer()];
                        case 2:
                            abCipherdata = _a.sent();
                            return [4 /*yield*/, this.decryptArrayBuffer(bKey, abCipherdata)];
                        case 3:
                            abPlaindata = _a.sent();
                            return [2 /*return*/, File.create({
                                    name: file.name,
                                    data: abPlaindata,
                                })];
                    }
                });
            });
        };