async addECDHE()

in src/keyschedule.js [80:94]

• 14 lines of code
• 3 McCabe index (conditional complexity)

  async addECDHE(ecdhe) {
    // Mix in the ECDHE output (if any) to calculate the "handshake secret".
    if (ecdhe === null) {
      ecdhe = zeros(HASH_LENGTH);
    }
    if (this.stage !== STAGE_EARLY_SECRET) {
      throw new TLSError(ALERT_DESCRIPTION.INTERNAL_ERROR);
    }
    this.stage = STAGE_HANDSHAKE_SECRET;
    this.extBinderKey = null;
    this.secret = await hkdfExtract(this.secret, ecdhe);
    this.clientHandshakeTrafficSecret = await this.deriveSecret('c hs traffic');
    this.serverHandshakeTrafficSecret = await this.deriveSecret('s hs traffic');
    this.secret = await this.deriveSecret('derived', EMPTY);
  }