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278 lines
7.2 KiB
278 lines
7.2 KiB
7 years ago
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// Copyright 2017 Joyent, Inc.
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module.exports = Identity;
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var assert = require('assert-plus');
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var algs = require('./algs');
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var crypto = require('crypto');
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var Fingerprint = require('./fingerprint');
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var Signature = require('./signature');
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var errs = require('./errors');
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var util = require('util');
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var utils = require('./utils');
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var asn1 = require('asn1');
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/*JSSTYLED*/
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var DNS_NAME_RE = /^([*]|[a-z0-9][a-z0-9\-]{0,62})(?:\.([*]|[a-z0-9][a-z0-9\-]{0,62}))*$/i;
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var oids = {};
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oids.cn = '2.5.4.3';
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oids.o = '2.5.4.10';
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oids.ou = '2.5.4.11';
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oids.l = '2.5.4.7';
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oids.s = '2.5.4.8';
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oids.c = '2.5.4.6';
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oids.sn = '2.5.4.4';
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oids.dc = '0.9.2342.19200300.100.1.25';
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oids.uid = '0.9.2342.19200300.100.1.1';
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oids.mail = '0.9.2342.19200300.100.1.3';
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var unoids = {};
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Object.keys(oids).forEach(function (k) {
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unoids[oids[k]] = k;
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});
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function Identity(opts) {
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var self = this;
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assert.object(opts, 'options');
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assert.arrayOfObject(opts.components, 'options.components');
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this.components = opts.components;
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this.componentLookup = {};
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this.components.forEach(function (c) {
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if (c.name && !c.oid)
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c.oid = oids[c.name];
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if (c.oid && !c.name)
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c.name = unoids[c.oid];
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if (self.componentLookup[c.name] === undefined)
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self.componentLookup[c.name] = [];
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self.componentLookup[c.name].push(c);
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});
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if (this.componentLookup.cn && this.componentLookup.cn.length > 0) {
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this.cn = this.componentLookup.cn[0].value;
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}
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assert.optionalString(opts.type, 'options.type');
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if (opts.type === undefined) {
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if (this.components.length === 1 &&
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this.componentLookup.cn &&
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this.componentLookup.cn.length === 1 &&
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this.componentLookup.cn[0].value.match(DNS_NAME_RE)) {
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this.type = 'host';
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this.hostname = this.componentLookup.cn[0].value;
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} else if (this.componentLookup.dc &&
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this.components.length === this.componentLookup.dc.length) {
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this.type = 'host';
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this.hostname = this.componentLookup.dc.map(
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function (c) {
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return (c.value);
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}).join('.');
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} else if (this.componentLookup.uid &&
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this.components.length ===
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this.componentLookup.uid.length) {
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this.type = 'user';
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this.uid = this.componentLookup.uid[0].value;
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} else if (this.componentLookup.cn &&
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this.componentLookup.cn.length === 1 &&
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this.componentLookup.cn[0].value.match(DNS_NAME_RE)) {
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this.type = 'host';
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this.hostname = this.componentLookup.cn[0].value;
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} else if (this.componentLookup.uid &&
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this.componentLookup.uid.length === 1) {
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this.type = 'user';
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this.uid = this.componentLookup.uid[0].value;
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} else if (this.componentLookup.mail &&
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this.componentLookup.mail.length === 1) {
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this.type = 'email';
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this.email = this.componentLookup.mail[0].value;
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} else if (this.componentLookup.cn &&
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this.componentLookup.cn.length === 1) {
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this.type = 'user';
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this.uid = this.componentLookup.cn[0].value;
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} else {
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this.type = 'unknown';
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}
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} else {
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this.type = opts.type;
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if (this.type === 'host')
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this.hostname = opts.hostname;
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else if (this.type === 'user')
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this.uid = opts.uid;
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else if (this.type === 'email')
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this.email = opts.email;
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else
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throw (new Error('Unknown type ' + this.type));
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}
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}
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Identity.prototype.toString = function () {
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return (this.components.map(function (c) {
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return (c.name.toUpperCase() + '=' + c.value);
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}).join(', '));
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};
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/*
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* These are from X.680 -- PrintableString allowed chars are in section 37.4
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* table 8. Spec for IA5Strings is "1,6 + SPACE + DEL" where 1 refers to
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* ISO IR #001 (standard ASCII control characters) and 6 refers to ISO IR #006
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* (the basic ASCII character set).
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*/
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/* JSSTYLED */
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var NOT_PRINTABLE = /[^a-zA-Z0-9 '(),+.\/:=?-]/;
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/* JSSTYLED */
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var NOT_IA5 = /[^\x00-\x7f]/;
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Identity.prototype.toAsn1 = function (der, tag) {
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der.startSequence(tag);
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this.components.forEach(function (c) {
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der.startSequence(asn1.Ber.Constructor | asn1.Ber.Set);
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der.startSequence();
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der.writeOID(c.oid);
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/*
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* If we fit in a PrintableString, use that. Otherwise use an
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* IA5String or UTF8String.
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*/
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if (c.value.match(NOT_IA5)) {
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var v = new Buffer(c.value, 'utf8');
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der.writeBuffer(v, asn1.Ber.Utf8String);
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} else if (c.value.match(NOT_PRINTABLE)) {
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der.writeString(c.value, asn1.Ber.IA5String);
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} else {
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der.writeString(c.value, asn1.Ber.PrintableString);
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}
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der.endSequence();
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der.endSequence();
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});
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der.endSequence();
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};
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function globMatch(a, b) {
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if (a === '**' || b === '**')
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return (true);
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var aParts = a.split('.');
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var bParts = b.split('.');
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if (aParts.length !== bParts.length)
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return (false);
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for (var i = 0; i < aParts.length; ++i) {
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if (aParts[i] === '*' || bParts[i] === '*')
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continue;
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if (aParts[i] !== bParts[i])
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return (false);
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}
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return (true);
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}
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Identity.prototype.equals = function (other) {
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if (!Identity.isIdentity(other, [1, 0]))
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return (false);
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if (other.components.length !== this.components.length)
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return (false);
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for (var i = 0; i < this.components.length; ++i) {
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if (this.components[i].oid !== other.components[i].oid)
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return (false);
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if (!globMatch(this.components[i].value,
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other.components[i].value)) {
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return (false);
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}
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}
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return (true);
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};
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Identity.forHost = function (hostname) {
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assert.string(hostname, 'hostname');
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return (new Identity({
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type: 'host',
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hostname: hostname,
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components: [ { name: 'cn', value: hostname } ]
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}));
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};
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Identity.forUser = function (uid) {
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assert.string(uid, 'uid');
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return (new Identity({
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type: 'user',
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uid: uid,
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components: [ { name: 'uid', value: uid } ]
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}));
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};
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Identity.forEmail = function (email) {
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assert.string(email, 'email');
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return (new Identity({
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type: 'email',
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email: email,
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components: [ { name: 'mail', value: email } ]
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}));
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};
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Identity.parseDN = function (dn) {
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assert.string(dn, 'dn');
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var parts = dn.split(',');
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var cmps = parts.map(function (c) {
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c = c.trim();
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var eqPos = c.indexOf('=');
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var name = c.slice(0, eqPos).toLowerCase();
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var value = c.slice(eqPos + 1);
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return ({ name: name, value: value });
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});
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return (new Identity({ components: cmps }));
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};
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Identity.parseAsn1 = function (der, top) {
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var components = [];
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der.readSequence(top);
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var end = der.offset + der.length;
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while (der.offset < end) {
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der.readSequence(asn1.Ber.Constructor | asn1.Ber.Set);
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var after = der.offset + der.length;
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der.readSequence();
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var oid = der.readOID();
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var type = der.peek();
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var value;
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switch (type) {
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case asn1.Ber.PrintableString:
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case asn1.Ber.IA5String:
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case asn1.Ber.OctetString:
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case asn1.Ber.T61String:
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value = der.readString(type);
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break;
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case asn1.Ber.Utf8String:
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value = der.readString(type, true);
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value = value.toString('utf8');
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break;
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case asn1.Ber.CharacterString:
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case asn1.Ber.BMPString:
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value = der.readString(type, true);
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value = value.toString('utf16le');
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break;
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default:
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throw (new Error('Unknown asn1 type ' + type));
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}
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components.push({ oid: oid, value: value });
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der._offset = after;
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}
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der._offset = end;
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return (new Identity({
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components: components
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}));
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};
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Identity.isIdentity = function (obj, ver) {
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return (utils.isCompatible(obj, Identity, ver));
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};
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/*
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* API versions for Identity:
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* [1,0] -- initial ver
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*/
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Identity.prototype._sshpkApiVersion = [1, 0];
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Identity._oldVersionDetect = function (obj) {
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return ([1, 0]);
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};
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