dynatrace-cordova-outsystems-plugin/node_modules/sshpk/lib/fingerprint.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

// Copyright 2018 Joyent, Inc.

module.exports = Fingerprint;

var assert = require('assert-plus');
var Buffer = require('safer-buffer').Buffer;
var algs = require('./algs');
var crypto = require('crypto');
var errs = require('./errors');
var Key = require('./key');
var PrivateKey = require('./private-key');
var Certificate = require('./certificate');
var utils = require('./utils');

var FingerprintFormatError = errs.FingerprintFormatError;
var InvalidAlgorithmError = errs.InvalidAlgorithmError;

function Fingerprint(opts) {
	assert.object(opts, 'options');
	assert.string(opts.type, 'options.type');
	assert.buffer(opts.hash, 'options.hash');
	assert.string(opts.algorithm, 'options.algorithm');

	this.algorithm = opts.algorithm.toLowerCase();
	if (algs.hashAlgs[this.algorithm] !== true)
		throw (new InvalidAlgorithmError(this.algorithm));

	this.hash = opts.hash;
	this.type = opts.type;
	this.hashType = opts.hashType;
}

Fingerprint.prototype.toString = function (format) {
	if (format === undefined) {
		if (this.algorithm === 'md5' || this.hashType === 'spki')
			format = 'hex';
		else
			format = 'base64';
	}
	assert.string(format);

	switch (format) {
	case 'hex':
		if (this.hashType === 'spki')
			return (this.hash.toString('hex'));
		return (addColons(this.hash.toString('hex')));
	case 'base64':
		if (this.hashType === 'spki')
			return (this.hash.toString('base64'));
		return (sshBase64Format(this.algorithm,
		    this.hash.toString('base64')));
	default:
		throw (new FingerprintFormatError(undefined, format));
	}
};

Fingerprint.prototype.matches = function (other) {
	assert.object(other, 'key or certificate');
	if (this.type === 'key' && this.hashType !== 'ssh') {
		utils.assertCompatible(other, Key, [1, 7], 'key with spki');
		if (PrivateKey.isPrivateKey(other)) {
			utils.assertCompatible(other, PrivateKey, [1, 6],
			    'privatekey with spki support');
		}
	} else if (this.type === 'key') {
		utils.assertCompatible(other, Key, [1, 0], 'key');
	} else {
		utils.assertCompatible(other, Certificate, [1, 0],
		    'certificate');
	}

	var theirHash = other.hash(this.algorithm, this.hashType);
	var theirHash2 = crypto.createHash(this.algorithm).
	    update(theirHash).digest('base64');

	if (this.hash2 === undefined)
		this.hash2 = crypto.createHash(this.algorithm).
		    update(this.hash).digest('base64');

	return (this.hash2 === theirHash2);
};

/*JSSTYLED*/
var base64RE = /^[A-Za-z0-9+\/=]+$/;
/*JSSTYLED*/
var hexRE = /^[a-fA-F0-9]+$/;

Fingerprint.parse = function (fp, options) {
	assert.string(fp, 'fingerprint');

	var alg, hash, enAlgs;
	if (Array.isArray(options)) {
		enAlgs = options;
		options = {};
	}
	assert.optionalObject(options, 'options');
	if (options === undefined)
		options = {};
	if (options.enAlgs !== undefined)
		enAlgs = options.enAlgs;
	if (options.algorithms !== undefined)
		enAlgs = options.algorithms;
	assert.optionalArrayOfString(enAlgs, 'algorithms');

	var hashType = 'ssh';
	if (options.hashType !== undefined)
		hashType = options.hashType;
	assert.string(hashType, 'options.hashType');

	var parts = fp.split(':');
	if (parts.length == 2) {
		alg = parts[0].toLowerCase();
		if (!base64RE.test(parts[1]))
			throw (new FingerprintFormatError(fp));
		try {
			hash = Buffer.from(parts[1], 'base64');
		} catch (e) {
			throw (new FingerprintFormatError(fp));
		}
	} else if (parts.length > 2) {
		alg = 'md5';
		if (parts[0].toLowerCase() === 'md5')
			parts = parts.slice(1);
		parts = parts.map(function (p) {
			while (p.length < 2)
				p = '0' + p;
			if (p.length > 2)
				throw (new FingerprintFormatError(fp));
			return (p);
		});
		parts = parts.join('');
		if (!hexRE.test(parts) || parts.length % 2 !== 0)
			throw (new FingerprintFormatError(fp));
		try {
			hash = Buffer.from(parts, 'hex');
		} catch (e) {
			throw (new FingerprintFormatError(fp));
		}
	} else {
		if (hexRE.test(fp)) {
			hash = Buffer.from(fp, 'hex');
		} else if (base64RE.test(fp)) {
			hash = Buffer.from(fp, 'base64');
		} else {
			throw (new FingerprintFormatError(fp));
		}

		switch (hash.length) {
		case 32:
			alg = 'sha256';
			break;
		case 16:
			alg = 'md5';
			break;
		case 20:
			alg = 'sha1';
			break;
		case 64:
			alg = 'sha512';
			break;
		default:
			throw (new FingerprintFormatError(fp));
		}

		/* Plain hex/base64: guess it's probably SPKI unless told. */
		if (options.hashType === undefined)
			hashType = 'spki';
	}

	if (alg === undefined)
		throw (new FingerprintFormatError(fp));

	if (algs.hashAlgs[alg] === undefined)
		throw (new InvalidAlgorithmError(alg));

	if (enAlgs !== undefined) {
		enAlgs = enAlgs.map(function (a) { return a.toLowerCase(); });
		if (enAlgs.indexOf(alg) === -1)
			throw (new InvalidAlgorithmError(alg));
	}

	return (new Fingerprint({
		algorithm: alg,
		hash: hash,
		type: options.type || 'key',
		hashType: hashType
	}));
};

function addColons(s) {
	/*JSSTYLED*/
	return (s.replace(/(.{2})(?=.)/g, '$1:'));
}

function base64Strip(s) {
	/*JSSTYLED*/
	return (s.replace(/=*$/, ''));
}

function sshBase64Format(alg, h) {
	return (alg.toUpperCase() + ':' + base64Strip(h));
}

Fingerprint.isFingerprint = function (obj, ver) {
	return (utils.isCompatible(obj, Fingerprint, ver));
};

/*
 * API versions for Fingerprint:
 * [1,0] -- initial ver
 * [1,1] -- first tagged ver
 * [1,2] -- hashType and spki support
 */
Fingerprint.prototype._sshpkApiVersion = [1, 2];

Fingerprint._oldVersionDetect = function (obj) {
	assert.func(obj.toString);
	assert.func(obj.matches);
	return ([1, 0]);
};