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// 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.dc = '0.9.2342.19200300.100.1.25'; oids.uid = '0.9.2342.19200300.100.1.1'; oids.mail = '0.9.2342.19200300.100.1.3'; var unoids = {}; Object.keys(oids).forEach(function (k) { unoids[oids[k]] = k; }); function Identity(opts) { var self = this; assert.object(opts, 'options'); assert.arrayOfObject(opts.components, 'options.components'); this.components = opts.components; this.componentLookup = {}; this.components.forEach(function (c) { if (c.name && !c.oid) c.oid = oids[c.name]; if (c.oid && !c.name) c.name = unoids[c.oid]; if (self.componentLookup[c.name] === undefined) self.componentLookup[c.name] = []; self.componentLookup[c.name].push(c); }); if (this.componentLookup.cn && this.componentLookup.cn.length > 0) { this.cn = this.componentLookup.cn[0].value; } assert.optionalString(opts.type, 'options.type'); if (opts.type === undefined) { if (this.components.length === 1 && this.componentLookup.cn && this.componentLookup.cn.length === 1 && this.componentLookup.cn[0].value.match(DNS_NAME_RE)) { this.type = 'host'; this.hostname = this.componentLookup.cn[0].value; } else if (this.componentLookup.dc && this.components.length === this.componentLookup.dc.length) { this.type = 'host'; this.hostname = this.componentLookup.dc.map( function (c) { return (c.value); }).join('.'); } else if (this.componentLookup.uid && this.components.length === this.componentLookup.uid.length) { this.type = 'user'; this.uid = this.componentLookup.uid[0].value; } else if (this.componentLookup.cn && this.componentLookup.cn.length === 1 && this.componentLookup.cn[0].value.match(DNS_NAME_RE)) { this.type = 'host'; this.hostname = this.componentLookup.cn[0].value; } else if (this.componentLookup.uid && this.componentLookup.uid.length === 1) { this.type = 'user'; this.uid = this.componentLookup.uid[0].value; } else if (this.componentLookup.mail && this.componentLookup.mail.length === 1) { this.type = 'email'; this.email = this.componentLookup.mail[0].value; } else if (this.componentLookup.cn && this.componentLookup.cn.length === 1) { this.type = 'user'; this.uid = this.componentLookup.cn[0].value; } else { this.type = 'unknown'; } } else { this.type = opts.type; if (this.type === 'host') this.hostname = opts.hostname; else if (this.type === 'user') this.uid = opts.uid; else if (this.type === 'email') this.email = opts.email; else throw (new Error('Unknown type ' + this.type)); } } Identity.prototype.toString = function () { return (this.components.map(function (c) { return (c.name.toUpperCase() + '=' + c.value); }).join(', ')); }; /* * These are from X.680 -- PrintableString allowed chars are in section 37.4 * table 8. Spec for IA5Strings is "1,6 + SPACE + DEL" where 1 refers to * ISO IR #001 (standard ASCII control characters) and 6 refers to ISO IR #006 * (the basic ASCII character set). */ /* JSSTYLED */ var NOT_PRINTABLE = /[^a-zA-Z0-9 '(),+.\/:=?-]/; /* JSSTYLED */ var NOT_IA5 = /[^\x00-\x7f]/; Identity.prototype.toAsn1 = function (der, tag) { der.startSequence(tag); this.components.forEach(function (c) { der.startSequence(asn1.Ber.Constructor | asn1.Ber.Set); der.startSequence(); der.writeOID(c.oid); /* * If we fit in a PrintableString, use that. Otherwise use an * IA5String or UTF8String. * * If this identity was parsed from a DN, use the ASN.1 types * from the original representation (otherwise this might not * be a full match for the original in some validators). */ if (c.asn1type === asn1.Ber.Utf8String || c.value.match(NOT_IA5)) { var v = Buffer.from(c.value, 'utf8'); der.writeBuffer(v, asn1.Ber.Utf8String); } else if (c.asn1type === asn1.Ber.IA5String || c.value.match(NOT_PRINTABLE)) { der.writeString(c.value, asn1.Ber.IA5String); } else { var type = asn1.Ber.PrintableString; if (c.asn1type !== undefined) type = c.asn1type; der.writeString(c.value, type); } der.endSequence(); der.endSequence(); }); der.endSequence(); }; function globMatch(a, b) { if (a === '**' || b === '**') return (true); var aParts = a.split('.'); var bParts = b.split('.'); if (aParts.length !== bParts.length) return (false); for (var i = 0; i < aParts.length; ++i) { if (aParts[i] === '*' || bParts[i] === '*') continue; if (aParts[i] !== bParts[i]) return (false); } return (true); } Identity.prototype.equals = function (other) { if (!Identity.isIdentity(other, [1, 0])) return (false); if (other.components.length !== this.components.length) return (false); for (var i = 0; i < this.components.length; ++i) { if (this.components[i].oid !== other.components[i].oid) return (false); if (!globMatch(this.components[i].value, other.components[i].value)) { return (false); } } return (true); }; Identity.forHost = function (hostname) { assert.string(hostname, 'hostname'); return (new Identity({ type: 'host', hostname: hostname, components: [ { name: 'cn', value: hostname } ] })); }; Identity.forUser = function (uid) { assert.string(uid, 'uid'); return (new Identity({ type: 'user', uid: uid, components: [ { name: 'uid', value: uid } ] })); }; Identity.forEmail = function (email) { assert.string(email, 'email'); return (new Identity({ type: 'email', email: email, components: [ { name: 'mail', value: email } ] })); }; Identity.parseDN = function (dn) { assert.string(dn, 'dn'); var parts = dn.split(','); var cmps = parts.map(function (c) { c = c.trim(); var eqPos = c.indexOf('='); var name = c.slice(0, eqPos).toLowerCase(); var value = c.slice(eqPos + 1); return ({ name: name, value: value }); }); return (new Identity({ components: cmps })); }; Identity.parseAsn1 = function (der, top) { var components = []; der.readSequence(top); var end = der.offset + der.length; while (der.offset < end) { der.readSequence(asn1.Ber.Constructor | asn1.Ber.Set); var after = der.offset + der.length; der.readSequence(); var oid = der.readOID(); var type = der.peek(); var value; switch (type) { case asn1.Ber.PrintableString: case asn1.Ber.IA5String: case asn1.Ber.OctetString: case asn1.Ber.T61String: value = der.readString(type); break; case asn1.Ber.Utf8String: value = der.readString(type, true); value = value.toString('utf8'); break; case asn1.Ber.CharacterString: case asn1.Ber.BMPString: value = der.readString(type, true); value = value.toString('utf16le'); break; default: throw (new Error('Unknown asn1 type ' + type)); } components.push({ oid: oid, asn1type: type, value: value }); der._offset = after; } der._offset = end; return (new Identity({ components: components })); }; Identity.isIdentity = function (obj, ver) { return (utils.isCompatible(obj, Identity, ver)); }; /* * API versions for Identity: * [1,0] -- initial ver */ Identity.prototype._sshpkApiVersion = [1, 0]; Identity._oldVersionDetect = function (obj) { return ([1, 0]); };
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