How to use the safer-buffer.Buffer function in safer-buffer

// Copyright 2017 Joyent, Inc.  All rights reserved.

var test = require('tape').test;

var sshpk = require('../lib/index');
var sshpk_dhe;
var fs = require('fs');
var path = require('path');
var crypto = require('crypto');
var sinon = require('sinon');
var Buffer = require('safer-buffer').Buffer;

/* No need to do these on an older node */
if (crypto.createECDH === undefined)
	return;

var ED_KEY, ED2_KEY, EC_KEY, EC2_KEY, ECOUT_KEY, DS_KEY, DS2_KEY, DSOUT_KEY;
var C_KEY, C2_KEY;
var C_SSH;

var testDir = path.join(__dirname, 'assets');

var sandbox;

test('set up sandbox', function (t) {
	sandbox = sinon.sandbox.create();
	sandbox.stub(crypto, 'createECDH');

* copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

'use strict';

var assert = require('assert');
var Iconv = require('../lib/iconv').Iconv;
var Buffer = require('safer-buffer').Buffer;

// unknown source/target encoding
assert.throws(function() { new Iconv('utf-8', 'xxx'); });
assert.throws(function() { new Iconv('xxx', 'utf-8'); });

// 'utf8' etc. should not throw "EINVAL: Conversion not supported"
new Iconv('utf7',    'utf8');
new Iconv('utf8',    'utf16');
new Iconv('utf16',   'utf32');
new Iconv('utf16le', 'utf16be');
new Iconv('utf32le', 'utf32be');

// https://github.com/bnoordhuis/node-iconv/issues/152
new Iconv('windows-31J', 'windows-31j');

var iconv = new Iconv('utf-8', 'iso-8859-1');

// Copyright 2016 Joyent, Inc.

module.exports = Certificate;

var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
var algs = require('./algs');
var crypto = require('crypto');
var Fingerprint = require('./fingerprint');
var Signature = require('./signature');
var errs = require('./errors');
var util = require('util');
var utils = require('./utils');
var Key = require('./key');
var PrivateKey = require('./private-key');
var Identity = require('./identity');

var formats = {};
formats['openssh'] = require('./formats/openssh-cert');
formats['x509'] = require('./formats/x509');
formats['pem'] = require('./formats/x509-pem');

"use strict";
var Buffer = require("safer-buffer").Buffer;

// Export Node.js internal encodings.

module.exports = {
    // Encodings
    utf8:   { type: "_internal", bomAware: true},
    cesu8:  { type: "_internal", bomAware: true},
    unicode11utf8: "utf8",

    ucs2:   { type: "_internal", bomAware: true},
    utf16le: "ucs2",

    binary: { type: "_internal" },
    base64: { type: "_internal" },
    hex:    { type: "_internal" },

// Copyright 2015 Joyent, Inc.

module.exports = {
	read: read,
	readSSHPrivate: readSSHPrivate,
	write: write
};

var assert = require('assert-plus');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;
var algs = require('../algs');
var utils = require('../utils');
var crypto = require('crypto');

var Key = require('../key');
var PrivateKey = require('../private-key');
var pem = require('./pem');
var rfc4253 = require('./rfc4253');
var SSHBuffer = require('../ssh-buffer');
var errors = require('../errors');

var bcrypt;

function read(buf, options) {
	return (pem.read(buf, options));
}

var crypto = require("crypto");
var BigInteger = require("jsbn").BigInteger;
var ECPointFp = require("./lib/ec.js").ECPointFp;
var Buffer = require("safer-buffer").Buffer;
exports.ECCurves = require("./lib/sec.js");

// zero prepad
function unstupid(hex,len)
{
	return (hex.length >= len) ? hex : unstupid("0"+hex,len);
}

exports.ECKey = function(curve, key, isPublic)
{
  var priv;
	var c = curve();
	var n = c.getN();
  var bytes = Math.floor(n.bitLength()/8);

  if(key)

// Copyright 2017 Joyent, Inc.

module.exports = Identity;

var assert = require('assert-plus');
var algs = require('./algs');
var crypto = require('crypto');
var Fingerprint = require('./fingerprint');
var Signature = require('./signature');
var errs = require('./errors');
var util = require('util');
var utils = require('./utils');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;

/*JSSTYLED*/
var DNS_NAME_RE = /^([*]|[a-z0-9][a-z0-9\-]{0,62})(?:\.([*]|[a-z0-9][a-z0-9\-]{0,62}))*$/i;

var oids = {};
oids.cn = '2.5.4.3';
oids.o = '2.5.4.10';
oids.ou = '2.5.4.11';
oids.l = '2.5.4.7';
oids.s = '2.5.4.8';
oids.c = '2.5.4.6';
oids.sn = '2.5.4.4';
oids.postalCode = '2.5.4.17';
oids.serialNumber = '2.5.4.5';
oids.street = '2.5.4.9';
oids.x500UniqueIdentifier = '2.5.4.45';

// Copyright 2017 Joyent, Inc.

module.exports = {
	read: read,
	verify: verify,
	sign: sign,
	signAsync: signAsync,
	write: write
};

var assert = require('assert-plus');
var asn1 = require('asn1');
var Buffer = require('safer-buffer').Buffer;
var algs = require('../algs');
var utils = require('../utils');
var Key = require('../key');
var PrivateKey = require('../private-key');
var pem = require('./pem');
var Identity = require('../identity');
var Signature = require('../signature');
var Certificate = require('../certificate');
var pkcs8 = require('./pkcs8');

/*
 * This file is based on RFC5280 (X.509).
 */

/* Helper to read in a single mpint */
function readMPInt(der, nm) {

mpNormalize: mpNormalize,
	mpDenormalize: mpDenormalize,
	ecNormalize: ecNormalize,
	countZeros: countZeros,
	assertCompatible: assertCompatible,
	isCompatible: isCompatible,
	opensslKeyDeriv: opensslKeyDeriv,
	opensshCipherInfo: opensshCipherInfo,
	publicFromPrivateECDSA: publicFromPrivateECDSA,
	zeroPadToLength: zeroPadToLength,
	writeBitString: writeBitString,
	readBitString: readBitString
};

var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
var PrivateKey = require('./private-key');
var Key = require('./key');
var crypto = require('crypto');
var algs = require('./algs');
var asn1 = require('asn1');

var ec, jsbn;
var nacl;

var MAX_CLASS_DEPTH = 3;

function isCompatible(obj, klass, needVer) {
	if (obj === null || typeof (obj) !== 'object')
		return (false);
	if (needVer === undefined)
		needVer = klass.prototype._sshpkApiVersion;

var fs = require("fs"),
    util = require("util"),
    extended = require("../extended"),
    Buffer = require('safer-buffer').Buffer,
    escape = extended.escape,
    isArray = extended.isArray,
    has = extended.has,
    stream = require("stream"),
    Transform = stream.Transform,
    LINE_BREAK = extended.LINE_BREAK,
    formatter = require("./formatter"),
    createFormatter = formatter.createFormatter,
    checkHeaders = formatter.checkHeaders,
    transformItem = formatter.transformItem,
    defaultTransform = formatter.defaultTransform;

function CsvTransformStream(options) {
    options = options || {};
    options.objectMode = true;