// GPG4Browsers - An OpenPGP implementation in javascript
// Copyright (C) 2011 Recurity Labs GmbH
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
var Util = function() {
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])?/;
this.hexdump = function(str) {
var r=[];
var e=str.length;
var c=0;
var h;
var i = 0;
while(c<e){
h=str.charCodeAt(c++).toString(16);
while(h.length<2) h="0"+h;
r.push(" "+h);
i++;
if (i % 32 == 0)
r.push("\n ");
}
return r.join('');
};
/**
* Create hexstring from a binary
* @param {String} str String to convert
* @return {String} String containing the hexadecimal values
*/
this.hexstrdump = function(str) {
if (str == null)
return "";
var r=[];
var e=str.length;
var c=0;
var h;
while(c<e){
h=str[c++].charCodeAt().toString(16);
while(h.length<2) h="0"+h;
r.push(""+h);
}
return r.join('');
};
/**
* Create binary string from a hex encoded string
* @param {String} str Hex string to convert
* @return {String} String containing the binary values
*/
this.hex2bin = function(hex) {
var str = '';
for (var i = 0; i < hex.length; i += 2)
str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
return str;
};
/**
* Creating a hex string from an binary array of integers (0..255)
* @param {String} str Array of bytes to convert
* @return {String} Hexadecimal representation of the array
*/
this.hexidump = function(str) {
var r=[];
var e=str.length;
var c=0;
var h;
while(c<e){
h=str[c++].toString(16);
while(h.length<2) h="0"+h;
r.push(""+h);
}
return r.join('');
};
/**
* Convert a native javascript string to a string of utf8 bytes
* @param {String} str The string to convert
* @return {String} A valid squence of utf8 bytes
*/
this.encode_utf8 = function(str) {
return unescape(encodeURIComponent(str));
};
/**
* Convert a string of utf8 bytes to a native javascript string
* @param {String} utf8 A valid squence of utf8 bytes
* @return {String} A native javascript string
*/
this.decode_utf8 = function(utf8) {
return decodeURIComponent(escape(utf8));
};
var str2bin = function(str, result) {
for (var i = 0; i < str.length; i++) {
result[i] = str.charCodeAt(i);
}
return result;
};
var bin2str = function(bin) {
var result = [];
for (var i = 0; i < bin.length; i++) {
result.push(String.fromCharCode(bin[i]));
}
return result.join('');
};
/**
* Convert a string to an array of integers(0.255)
* @param {String} str String to convert
* @return {Integer[]} An array of (binary) integers
*/
this.str2bin = function(str) {
return str2bin(str, new Array(str.length));
};
/**
* Convert an array of integers(0.255) to a string
* @param {Integer[]} bin An array of (binary) integers to convert
* @return {String} The string representation of the array
*/
this.bin2str = bin2str;
/**
* Convert a string to a Uint8Array
* @param {String} str String to convert
* @return {Uint8Array} The array of (binary) integers
*/
this.str2Uint8Array = function(str) {
return str2bin(str, new Uint8Array(new ArrayBuffer(str.length)));
};
/**
* Convert a Uint8Array to a string. This currently functions
* the same as bin2str.
* @param {Uint8Array} bin An array of (binary) integers to convert
* @return {String} String representation of the array
*/
this.Uint8Array2str = bin2str;
/**
* Calculates a 16bit sum of a string by adding each character
* codes modulus 65535
* @param {String} text String to create a sum of
* @return {Integer} An integer containing the sum of all character
* codes % 65535
*/
this.calc_checksum = function(text) {
var checksum = { s: 0, add: function (sadd) { this.s = (this.s + sadd) % 65536; }};
for (var i = 0; i < text.length; i++) {
checksum.add(text.charCodeAt(i));
}
return checksum.s;
};
/**
* Helper function to print a debug message. Debug
* messages are only printed if
* openpgp.config.debug is set to true. The calling
* Javascript context MUST define
* a "showMessages(text)" function. Line feeds ('\n')
* are automatically converted to HTML line feeds '<br/>'
* @param {String} str String of the debug message
* @return {String} An HTML tt entity containing a paragraph with a
* style attribute where the debug message is HTMLencoded in.
*/
this.print_debug = function(str) {
if (openpgp.config.debug) {
str = openpgp_encoding_html_encode(str);
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>");
}
};
/**
* Helper function to print a debug message. Debug
* messages are only printed if
* openpgp.config.debug is set to true. The calling
* Javascript context MUST define
* a "showMessages(text)" function. Line feeds ('\n')
* are automatically converted to HTML line feeds '<br/>'
* Different than print_debug because will call hexstrdump iff necessary.
* @param {String} str String of the debug message
* @return {String} An HTML tt entity containing a paragraph with a
* style attribute where the debug message is HTMLencoded in.
*/
this.print_debug_hexstr_dump = function(str,strToHex) {
if (openpgp.config.debug) {
str = str + this.hexstrdump(strToHex);
str = openpgp_encoding_html_encode(str);
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>");
}
};
/**
* Helper function to print an error message.
* The calling Javascript context MUST define
* a "showMessages(text)" function. Line feeds ('\n')
* are automatically converted to HTML line feeds '<br/>'
* @param {String} str String of the error message
* @return {String} A HTML paragraph entity with a style attribute
* containing the HTML encoded error message
*/
this.print_error = function(str) {
str = openpgp_encoding_html_encode(str);
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>");
};
/**
* Helper function to print an info message.
* The calling Javascript context MUST define
* a "showMessages(text)" function. Line feeds ('\n')
* are automatically converted to HTML line feeds '<br/>'.
* @param {String} str String of the info message
* @return {String} A HTML paragraph entity with a style attribute
* containing the HTML encoded info message
*/
this.print_info = function(str) {
str = openpgp_encoding_html_encode(str);
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>");
};
this.print_warning = function(str) {
str = openpgp_encoding_html_encode(str);
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>");
};
this.getLeftNBits = function (string, bitcount) {
var rest = bitcount % 8;
if (rest == 0)
return string.substring(0, bitcount / 8);
var bytes = (bitcount - rest) / 8 +1;
var result = string.substring(0, bytes);
return this.shiftRight(result, 8-rest); // +String.fromCharCode(string.charCodeAt(bytes -1) << (8-rest) & 0xFF);
};
/**
* Shifting a string to n bits right
* @param {String} value The string to shift
* @param {Integer} bitcount Amount of bits to shift (MUST be smaller
* than 9)
* @return {String} Resulting string.
*/
this.shiftRight = function(value, bitcount) {
var temp = util.str2bin(value);
if (bitcount % 8 != 0) {
for (var i = temp.length-1; i >= 0; i--) {
temp[i] >>= bitcount % 8;
if (i > 0)
temp[i] |= (temp[i - 1] << (8 - (bitcount % 8))) & 0xFF;
}
} else {
return value;
}
return util.bin2str(temp);
};
/**
* Return the algorithm type as string
* @return {String} String representing the message type
*/
this.get_hashAlgorithmString = function(algo) {
switch(algo) {
case 1:
return "MD5";
case 2:
return "SHA1";
case 3:
return "RIPEMD160";
case 8:
return "SHA256";
case 9:
return "SHA384";
case 10:
return "SHA512";
case 11:
return "SHA224";
}
return "unknown";
};
};
/**
* an instance that should be used.
*/
var util = new Util();