57 lines
2.4 KiB
JavaScript
57 lines
2.4 KiB
JavaScript
// GPG4Browsers - An OpenPGP implementation in javascript
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// Copyright (C) 2011 Recurity Labs GmbH
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/**
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* @class
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* @classdesc Implementation of the User Attribute Packet (Tag 17)
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* The User Attribute packet is a variation of the User ID packet. It
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* is capable of storing more types of data than the User ID packet,
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* which is limited to text. Like the User ID packet, a User Attribute
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* packet may be certified by the key owner ("self-signed") or any other
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* key owner who cares to certify it. Except as noted, a User Attribute
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* packet may be used anywhere that a User ID packet may be used.
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*
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* While User Attribute packets are not a required part of the OpenPGP
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* standard, implementations SHOULD provide at least enough
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* compatibility to properly handle a certification signature on the
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* User Attribute packet. A simple way to do this is by treating the
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* User Attribute packet as a User ID packet with opaque contents, but
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* an implementation may use any method desired.
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*/
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module.exports = function packet_user_attribute() {
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this.tag = 17;
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this.attributes = [];
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/**
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* parsing function for a user attribute packet (tag 17).
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* @param {String} input payload of a tag 17 packet
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* @param {Integer} position position to start reading from the input string
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* @param {Integer} len length of the packet or the remaining length of input at position
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* @return {openpgp_packet_encrypteddata} object representation
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*/
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this.read = function(bytes) {
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var i = 0;
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while (i < bytes.length) {
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var len = openpgp_packet.read_simple_length(bytes);
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i += len.offset;
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this.attributes.push(bytes.substr(i, len.len));
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i += len.len;
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}
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}
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};
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