s);
  const pssSaltLength = getSaltLength(options);

  // Options specific to (EC)DSA
  const dsaSigEnc = getDSASignatureEncoding(options);

  const ret = this[kHandle].sign(data, format, type, passphrase, rsaPadding,
                                 pssSaltLength, dsaSigEnc);

  encoding = encoding || getDefaultEncoding();
  if (encoding && encoding !== 'buffer')
    return ret.toString(encoding);

  return ret;
};

function signOneShot(algorithm, data, key, callback) {
  if (algorithm != null)
    validateString(algorithm, 'algorithm');

  if (callback !== undefined)
    validateCallback(callback);

  data = getArrayBufferOrView(data, 'data');

  if (!key)
    throw new ERR_CRYPTO_SIGN_KEY_REQUIRED();

  // Options specific to RSA
  const rsaPadding = getPadding(key);
  const pssSaltLength = getSaltLength(key);

  // Options specific to (EC)DSA
  const dsaSigEnc = getDSASignatureEncoding(key);

  const {
    data: keyData,
    format: keyFormat,
    type: keyType,
    passphrase: keyPassphrase
  } = preparePrivateKey(key);

  const job = new SignJob(
    callback ? kCryptoJobAsync : kCryptoJobSync,
    kSignJobModeSign,
    keyData,
    keyFormat,
    keyType,
    keyPassphrase,
    data,
    algorithm,
    pssSaltLength,
    rsaPadding,
    dsaSigEnc);

  if (!callback) {
    const { 0: err, 1: signature } = job.run();
    if (err !== undefined)
      throw err;

    return Buffer.from(signature);
  }

  job.ondone = (error, signature) => {
    if (error) return FunctionPrototypeCall(callback, job, error);
    FunctionPrototypeCall(callback, job, null, Buffer.from(signature));
  };
  job.run();
}

function Verify(algorithm, options) {
  if (!(this instanceof Verify))
    return new Verify(algorithm, options);
  validateString(algorithm, 'algorithm');
  this[kHandle] = new _Verify();
  this[kHandle].init(algorithm);

  ReflectApply(Writable, this, [options]);
}

ObjectSetPrototypeOf(Verify.prototype, Writable.prototype);
ObjectSetPrototypeOf(Verify, Writable);

Verify.prototype._write = Sign.prototype._write;
Verify.prototype.update = Sign.prototype.update;

Verify.prototype.verify = function verify(options, signature, sigEncoding) {
  const {
    data,
    format,
    type,
    passphrase
  } = preparePublicOrPrivateKey(options, true);

  sigEncoding = sigEncoding || getDefaultEncoding();

  // Options specific to RSA
  const rsaPadding = getPadding(options);
  const pssSaltLength = getSaltLength(options);

  // Options specific to (EC)DSA
  const dsaSigEnc = getDSASignatureEncoding(options);

  signature = getArrayBufferOrView(signature, 'signature', sigEncoding);

  return this[kHandle].verify(data, format, type, passphrase, signature,
                              rsaPadding, pssSaltLength, dsaSigEnc);
};

function verifyOneShot(algorithm, data, key, signature, callback) {
  if (algorithm != null)
    validateString(algorithm, 'algorithm');

  if (callback !== undefined)
    validateCallback(callback);

  data = getArrayBufferOrView(data, 'data');

  if (!isArrayBufferView(data)) {
    throw new ERR_INVALID_ARG_TYPE(
      'data',
      ['Buffer', 'TypedArray', 'DataView'],
      data
    );
  }

  // Options specific to RSA
  const rsaPadding = getPadding(key);
  const pssSaltLength = getSaltLength(key);

  // Options specific to (EC)DSA
  const dsaSigEnc = getDSASignatureEncoding(key);

  if (!isArrayBufferView(signature)) {
    throw new ERR_INVALID_ARG_TYPE(
      'signature',
      ['Buffer', 'TypedArray', 'DataView'],
      signature
    );
  }

  const {
    data: keyData,
    format: keyFormat,
    type: keyType,
    passphrase: keyPassphrase
  } = preparePublicOrPrivateKey(key);

  const job = new SignJob(
    callback ? kCryptoJobAsync : kCryptoJobSync,
    kSignJobModeVerify,
    keyData,
    keyFormat,
    keyType,
    keyPassphrase,
    data,
    algorithm,
    pssSaltLength,
    rsaPadding,
    dsaSigEnc,
    signature);

  if (!callback) {
    const { 0: err, 1: result } = job.run();
    if (err !== undefined)
      throw err;

    return result;
  }

  job.ondone = (error, result) => {
    if (error) return FunctionPrototypeCall(callback, job, error);
    FunctionPrototypeCall(callback, job, null, result);
  };
  job.run();
}

module.exports = {
  Sign,
  signOneShot,
  Verify,
  verifyOneShot,
};