162 lines
3.4 KiB
JavaScript
162 lines
3.4 KiB
JavaScript
// Copyright 2011 Mark Cavage, Inc. All rights reserved.
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var assert = require('assert');
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var asn1 = require('asn1');
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var Protocol = require('./protocol');
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///--- API
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function Attribute(options) {
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if (options) {
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if (typeof(options) !== 'object')
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throw new TypeError('options must be an object');
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if (options.type && typeof(options.type) !== 'string')
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throw new TypeError('options.type must be a string');
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} else {
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options = {};
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}
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var self = this;
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this.type = options.type || '';
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this._vals = [];
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this.__defineGetter__('vals', function() {
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var _vals = [];
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self._vals.forEach(function(v) {
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if (/;binary$/.test(self.type)) {
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_vals.push(v.toString('base64'));
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} else {
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_vals.push(v.toString('utf8'));
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}
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});
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return _vals;
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});
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this.__defineSetter__('vals', function(vals) {
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if (Array.isArray(vals)) {
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vals.forEach(function(v) {
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self.addValue(v);
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});
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} else {
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self.addValue(vals);
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}
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});
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this.__defineGetter__('buffers', function() {
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return self._vals;
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});
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this.__defineGetter__('json', function() {
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return {
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type: self.type,
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vals: self.vals
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};
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});
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if (options.vals)
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this.vals = options.vals;
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}
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module.exports = Attribute;
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Attribute.prototype.addValue = function(val) {
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if (Buffer.isBuffer(val)) {
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this._vals.push(val);
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} else {
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var encoding = 'utf8';
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if (/;binary$/.test(this.type))
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encoding = 'base64';
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this._vals.push(new Buffer(val + '', encoding));
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}
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};
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Attribute.compare = function(a, b) {
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if (!(a instanceof Attribute) || !(b instanceof Attribute))
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throw new TypeError('can only compare Attributes');
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if (a.type < b.type) return -1;
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if (a.type > b.type) return 1;
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if (a.vals.length < b.vals.length) return -1;
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if (a.vals.length > b.vals.length) return 1;
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for (var i = 0; i < a.vals.length; i++) {
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if (a.vals[i] < b.vals[i]) return -1;
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if (a.vals[i] > b.vals[i]) return 1;
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}
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return 0;
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};
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Attribute.prototype.parse = function(ber) {
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assert.ok(ber);
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ber.readSequence();
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this.type = ber.readString();
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if (ber.peek() === Protocol.LBER_SET) {
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if (ber.readSequence(Protocol.LBER_SET)) {
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var end = ber.offset + ber.length;
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while (ber.offset < end)
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this._vals.push(ber.readString(asn1.Ber.OctetString, true));
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}
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}
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return true;
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};
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Attribute.prototype.toBer = function(ber) {
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assert.ok(ber);
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ber.startSequence();
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ber.writeString(this.type);
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ber.startSequence(Protocol.LBER_SET);
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if (this._vals.length) {
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this._vals.forEach(function(b) {
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ber.writeByte(asn1.Ber.OctetString);
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ber.writeLength(b.length);
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for (var i = 0; i < b.length; i++)
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ber.writeByte(b[i]);
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});
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} else {
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ber.writeStringArray([]);
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}
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ber.endSequence();
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ber.endSequence();
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return ber;
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};
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Attribute.toBer = function(attr, ber) {
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return Attribute.prototype.toBer.call(attr, ber);
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};
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Attribute.isAttribute = function(attr) {
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if (!attr) return false;
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if (typeof(attr) !== 'object') return false;
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if (attr instanceof Attribute) return true;
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if (!attr.type || typeof(attr.type) !== 'string') return false;
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if (!attr.vals || !Array.isArray(attr.vals)) return false;
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for (var i = 0; i < attr.vals.length; i++)
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if (typeof(attr.vals[i]) !== 'string' && !Buffer.isBuffer(attr.vals[i]))
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return false;
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return true;
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};
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Attribute.prototype.toString = function() {
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return JSON.stringify(this.json);
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};
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