Language: TypeScript
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:
  getKey() {
    const sha = createHash('sha256');
    sha.update(Buffer.from(this.cipherKey, 'utf8'));
    return Buffer.from(sha.digest());
  }