_readVector()

in src/utils.js [224:242]

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

  _readVector(length, cb) {
    const contentsBuf = new BufferReader(this.readBytes(length));
    const expectedEnd = this.tell();
    // Keep calling the callback until we've consumed the expected number of bytes.
    let n = 0;
    while (contentsBuf.hasMoreBytes()) {
      const prevPos = contentsBuf.tell();
      cb(contentsBuf, n);
      // Check that the callback made forward progress, otherwise we'll infinite loop.
      if (contentsBuf.tell() <= prevPos) {
        throw new TLSError(ALERT_DESCRIPTION.DECODE_ERROR);
      }
      n += 1;
    }
    // Check that the callback correctly consumed the vector's entire contents.
    if (this.tell() !== expectedEnd) {
      throw new TLSError(ALERT_DESCRIPTION.DECODE_ERROR);
    }
  }