309 lines
9.7 KiB
JavaScript
309 lines
9.7 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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var Util = function() {
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this.emailRegEx = /[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/;
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this.hexdump = function(str) {
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var r=[];
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var e=str.length;
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var c=0;
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var h;
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var i = 0;
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while(c<e){
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h=str.charCodeAt(c++).toString(16);
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while(h.length<2) h="0"+h;
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r.push(" "+h);
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i++;
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if (i % 32 == 0)
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r.push("\n ");
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}
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return r.join('');
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};
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/**
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* Create hexstring from a binary
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* @param {String} str String to convert
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* @return {String} String containing the hexadecimal values
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*/
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this.hexstrdump = function(str) {
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if (str == null)
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return "";
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var r=[];
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var e=str.length;
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var c=0;
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var h;
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while(c<e){
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h=str[c++].charCodeAt().toString(16);
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while(h.length<2) h="0"+h;
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r.push(""+h);
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}
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return r.join('');
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};
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/**
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* Create binary string from a hex encoded string
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* @param {String} str Hex string to convert
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* @return {String} String containing the binary values
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*/
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this.hex2bin = function(hex) {
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var str = '';
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for (var i = 0; i < hex.length; i += 2)
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str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
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return str;
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};
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/**
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* Creating a hex string from an binary array of integers (0..255)
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* @param {String} str Array of bytes to convert
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* @return {String} Hexadecimal representation of the array
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*/
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this.hexidump = function(str) {
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var r=[];
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var e=str.length;
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var c=0;
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var h;
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while(c<e){
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h=str[c++].toString(16);
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while(h.length<2) h="0"+h;
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r.push(""+h);
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}
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return r.join('');
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};
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/**
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* Convert a native javascript string to a string of utf8 bytes
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* @param {String} str The string to convert
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* @return {String} A valid squence of utf8 bytes
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*/
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this.encode_utf8 = function(str) {
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return unescape(encodeURIComponent(str));
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};
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/**
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* Convert a string of utf8 bytes to a native javascript string
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* @param {String} utf8 A valid squence of utf8 bytes
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* @return {String} A native javascript string
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*/
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this.decode_utf8 = function(utf8) {
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try {
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return decodeURIComponent(escape(utf8));
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} catch (e) {
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return utf8;
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}
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};
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var str2bin = function(str, result) {
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for (var i = 0; i < str.length; i++) {
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result[i] = str.charCodeAt(i);
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}
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return result;
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};
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var bin2str = function(bin) {
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var result = [];
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for (var i = 0; i < bin.length; i++) {
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result.push(String.fromCharCode(bin[i]));
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}
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return result.join('');
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};
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/**
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* Convert a string to an array of integers(0.255)
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* @param {String} str String to convert
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* @return {Integer[]} An array of (binary) integers
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*/
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this.str2bin = function(str) {
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return str2bin(str, new Array(str.length));
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};
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/**
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* Convert an array of integers(0.255) to a string
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* @param {Integer[]} bin An array of (binary) integers to convert
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* @return {String} The string representation of the array
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*/
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this.bin2str = bin2str;
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/**
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* Convert a string to a Uint8Array
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* @param {String} str String to convert
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* @return {Uint8Array} The array of (binary) integers
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*/
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this.str2Uint8Array = function(str) {
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return str2bin(str, new Uint8Array(new ArrayBuffer(str.length)));
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};
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/**
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* Convert a Uint8Array to a string. This currently functions
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* the same as bin2str.
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* @param {Uint8Array} bin An array of (binary) integers to convert
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* @return {String} String representation of the array
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*/
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this.Uint8Array2str = bin2str;
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/**
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* Calculates a 16bit sum of a string by adding each character
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* codes modulus 65535
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* @param {String} text String to create a sum of
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* @return {Integer} An integer containing the sum of all character
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* codes % 65535
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*/
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this.calc_checksum = function(text) {
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var checksum = { s: 0, add: function (sadd) { this.s = (this.s + sadd) % 65536; }};
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for (var i = 0; i < text.length; i++) {
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checksum.add(text.charCodeAt(i));
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}
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return checksum.s;
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};
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/**
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* Helper function to print a debug message. Debug
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* messages are only printed if
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* openpgp.config.debug is set to true. The calling
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* Javascript context MUST define
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* a "showMessages(text)" function. Line feeds ('\n')
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* are automatically converted to HTML line feeds '<br/>'
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* @param {String} str String of the debug message
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* @return {String} An HTML tt entity containing a paragraph with a
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* style attribute where the debug message is HTMLencoded in.
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*/
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this.print_debug = function(str) {
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if (openpgp.config.debug) {
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str = openpgp_encoding_html_encode(str);
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showMessages("<tt><p style=\"background-color: #ffffff; width: 652px; word-break: break-word; padding: 5px; border-bottom: 1px solid black;\">"+str.replace(/\n/g,"<br>")+"</p></tt>");
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}
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};
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/**
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* Helper function to print a debug message. Debug
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* messages are only printed if
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* openpgp.config.debug is set to true. The calling
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* Javascript context MUST define
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* a "showMessages(text)" function. Line feeds ('\n')
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* are automatically converted to HTML line feeds '<br/>'
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* Different than print_debug because will call hexstrdump iff necessary.
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* @param {String} str String of the debug message
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* @return {String} An HTML tt entity containing a paragraph with a
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* style attribute where the debug message is HTMLencoded in.
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*/
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this.print_debug_hexstr_dump = function(str,strToHex) {
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if (openpgp.config.debug) {
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str = str + this.hexstrdump(strToHex);
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str = openpgp_encoding_html_encode(str);
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showMessages("<tt><p style=\"background-color: #ffffff; width: 652px; word-break: break-word; padding: 5px; border-bottom: 1px solid black;\">"+str.replace(/\n/g,"<br>")+"</p></tt>");
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}
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};
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/**
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* Helper function to print an error message.
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* The calling Javascript context MUST define
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* a "showMessages(text)" function. Line feeds ('\n')
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* are automatically converted to HTML line feeds '<br/>'
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* @param {String} str String of the error message
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* @return {String} A HTML paragraph entity with a style attribute
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* containing the HTML encoded error message
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*/
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this.print_error = function(str) {
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str = openpgp_encoding_html_encode(str);
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showMessages("<p style=\"font-size: 80%; background-color: #FF8888; margin:0; width: 652px; word-break: break-word; padding: 5px; border-bottom: 1px solid black;\"><span style=\"color: #888;\"><b>ERROR:</b></span> "+str.replace(/\n/g,"<br>")+"</p>");
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};
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/**
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* Helper function to print an info message.
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* The calling Javascript context MUST define
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* a "showMessages(text)" function. Line feeds ('\n')
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* are automatically converted to HTML line feeds '<br/>'.
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* @param {String} str String of the info message
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* @return {String} A HTML paragraph entity with a style attribute
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* containing the HTML encoded info message
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*/
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this.print_info = function(str) {
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str = openpgp_encoding_html_encode(str);
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showMessages("<p style=\"font-size: 80%; background-color: #88FF88; margin:0; width: 652px; word-break: break-word; padding: 5px; border-bottom: 1px solid black;\"><span style=\"color: #888;\"><b>INFO:</b></span> "+str.replace(/\n/g,"<br>")+"</p>");
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};
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this.print_warning = function(str) {
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str = openpgp_encoding_html_encode(str);
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showMessages("<p style=\"font-size: 80%; background-color: #FFAA88; margin:0; width: 652px; word-break: break-word; padding: 5px; border-bottom: 1px solid black;\"><span style=\"color: #888;\"><b>WARNING:</b></span> "+str.replace(/\n/g,"<br>")+"</p>");
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};
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this.getLeftNBits = function (string, bitcount) {
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var rest = bitcount % 8;
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if (rest == 0)
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return string.substring(0, bitcount / 8);
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var bytes = (bitcount - rest) / 8 +1;
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var result = string.substring(0, bytes);
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return this.shiftRight(result, 8-rest); // +String.fromCharCode(string.charCodeAt(bytes -1) << (8-rest) & 0xFF);
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};
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/**
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* Shifting a string to n bits right
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* @param {String} value The string to shift
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* @param {Integer} bitcount Amount of bits to shift (MUST be smaller
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* than 9)
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* @return {String} Resulting string.
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*/
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this.shiftRight = function(value, bitcount) {
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var temp = util.str2bin(value);
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if (bitcount % 8 != 0) {
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for (var i = temp.length-1; i >= 0; i--) {
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temp[i] >>= bitcount % 8;
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if (i > 0)
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temp[i] |= (temp[i - 1] << (8 - (bitcount % 8))) & 0xFF;
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}
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} else {
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return value;
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}
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return util.bin2str(temp);
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};
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/**
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* Return the algorithm type as string
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* @return {String} String representing the message type
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*/
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this.get_hashAlgorithmString = function(algo) {
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switch(algo) {
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case 1:
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return "MD5";
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case 2:
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return "SHA1";
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case 3:
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return "RIPEMD160";
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case 8:
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return "SHA256";
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case 9:
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return "SHA384";
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case 10:
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return "SHA512";
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case 11:
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return "SHA224";
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}
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return "unknown";
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};
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};
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/**
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* an instance that should be used.
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*/
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var util = new Util();
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