async recvChangeCipherSpec()

in src/states.js [175:183]

• 9 lines of code
• 4 McCabe index (conditional complexity)

  async recvChangeCipherSpec(bytes) {
    if (this.conn._hasSeenChangeCipherSpec) {
      throw new TLSError(ALERT_DESCRIPTION.UNEXPECTED_MESSAGE);
    }
    if (bytes.byteLength !== 1 || bytes[0] !== 1) {
      throw new TLSError(ALERT_DESCRIPTION.UNEXPECTED_MESSAGE);
    }
    this.conn._hasSeenChangeCipherSpec = true;
  }