Language: JavaScript
Label: safe
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.getKey = function (key) {
        return __awaiter(this, void 0, void 0, function () {
            var digest, hashHex, abKey;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, crypto.subtle.digest('SHA-256', WebCryptography.encoder.encode(key))];
                    case 1:
                        digest = _a.sent();
                        hashHex = Array.from(new Uint8Array(digest))
                            .map(function (b) { return b.toString(16).padStart(2, '0'); })
                            .join('');
                        abKey = WebCryptography.encoder.encode(hashHex.slice(0, 32)).buffer;
                        return [2 /*return*/, crypto.subtle.importKey('raw', abKey, 'AES-CBC', true, ['encrypt', 'decrypt'])];
                }
            });
        });
    };