How to use safer-buffer - 10 common examples

// 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');

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

var iconv = new Iconv('UTF-8', 'UTF-16LE');

var utf8 = Buffer.alloc(20000000);
for (var i = 0; i < utf8.length; i++) {
  utf8[i] = 97 + i % 26; // cycle from 'a' to 'z'.
}
var utf16 = iconv.convert(utf8);

assert.equal(utf16.length, utf8.length * 2);

for (i = 0; i < utf8.length; ++i) {
  assert.equal(utf16[i * 2], utf8[i]);
  assert.equal(utf16[i * 2 + 1], 0);
}

* 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');

m = lines[0].match(/*JSSTYLED*/
		    /^([A-Za-z0-9-]+): (.+)$/);
		if (!m)
			break;
		headers[m[1].toLowerCase()] = m[2];
	}

	var cipher, key, iv;
	if (headers['proc-type']) {
		var parts = headers['proc-type'].split(',');
		if (parts[0] === '4' && parts[1] === 'ENCRYPTED') {
			if (typeof (options.passphrase) === 'string') {
				options.passphrase = Buffer.from(
				    options.passphrase, 'utf-8');
			}
			if (!Buffer.isBuffer(options.passphrase)) {
				throw (new errors.KeyEncryptedError(
				    options.filename, 'PEM'));
			} else {
				parts = headers['dek-info'].split(',');
				assert.ok(parts.length === 2);
				cipher = parts[0].toLowerCase();
				iv = Buffer.from(parts[1], 'hex');
				key = utils.opensslKeyDeriv(cipher, iv,
				    options.passphrase, 1).key;
			}
		}
	}

	/* Chop off the first and last lines */
	lines = lines.slice(0, -1).join('');
	buf = Buffer.from(lines, 'base64');

// private key
	var d = der.readString(asn1.Ber.OctetString, true);

	der.readSequence(0xa0);
	var curve = readECDSACurve(der);
	assert.string(curve, 'a known elliptic curve');

	der.readSequence(0xa1);
	var Q = der.readString(asn1.Ber.BitString, true);
	Q = utils.ecNormalize(Q);

	var key = {
		type: 'ecdsa',
		parts: [
			{ name: 'curve', data: Buffer.from(curve) },
			{ name: 'Q', data: Q },
			{ name: 'd', data: d }
		]
	};

	return (new PrivateKey(key));
}

// Curve sequence
		der.startSequence();
		var a = curve.p;
		if (a[0] === 0x0)
			a = a.slice(1);
		der.writeBuffer(a, asn1.Ber.OctetString);
		der.writeBuffer(curve.b, asn1.Ber.OctetString);
		der.writeBuffer(curve.s, asn1.Ber.BitString);
		der.endSequence();

		der.writeBuffer(curve.G, asn1.Ber.OctetString);
		der.writeBuffer(curve.n, asn1.Ber.Integer);
		var h = curve.h;
		if (!h) {
			h = Buffer.from([1]);
		}
		der.writeBuffer(h, asn1.Ber.Integer);

		// ECParameters
		der.endSequence();
	}
}

function writeBitField(setBits, bitIndex) {
	var bitLen = bitIndex.length;
	var blen = Math.ceil(bitLen / 8);
	var unused = blen * 8 - bitLen;
	var bits = Buffer.alloc(1 + blen); // zero-filled
	bits[0] = unused;
	for (var i = 0; i < bitLen; ++i) {
		var byteN = 1 + Math.floor(i / 8);
		var bit = 7 - (i % 8);
		var mask = 1 << bit;
		var name = bitIndex[i];
		if (name === undefined)
			continue;
		var bitVal = (setBits.indexOf(name) !== -1);
		if (bitVal) {
			bits[byteN] |= mask;
		}
	}
	return (bits);
}

// 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));
}