Kevin van Zonneveld
25 Nov '08

  @ Linuxworld: Thanks a lot for your thorough contribution!

Linuxworld
22 Nov '08

   Hum, lacks a-f range in the previous snippet,
Hope this time is the good one.

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function bin2hex(s){
                // http://kevin.vanzonneveld.net
                // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
                // +   bugfixed by: Onno Marsman
                // +   bugfixed by:  Linuxworld (v2)                 // *     example 1: bin2hex('Kev');
                // *     returns 1: '4b6576'
                
                var v,i, f = 0, a = [];
                s += '';                f = s.length;
                for(i = 0; i<f; i++){
                        a[i] = s.charCodeAt(i).toString(16).replace(/^([\da-f])$/,"0$1");
                }
                return a.join('');        }

Linuxworld
22 Nov '08

   Sorry for the previous duplicates, here is the optimized version (ie shorter, with no more str_repeat dependency):

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function bin2hex(s){
                // http://kevin.vanzonneveld.net
                // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
                // +   bugfixed by: Onno Marsman
                // +   bugfixed by:  Linuxworld (v2)                 // *     example 1: bin2hex('Kev');
                // *     returns 1: '4b6576'
                
                var v,i, f = 0, a = [];
                s += '';                f = s.length;
                for(i = 0; i<f; i++){
                        a[i] = s.charCodeAt(i).toString(16).replace(/^(\d)$/,"0$1");
                }
                return a.join('');        }

Linuxworld
18 Nov '08

   Hello Kevin,

First, nice job and big thanks for sharing this kind of stuff: JS and PHP worth to be closer thanks to equivalents.

Before fixing your bin2hex function that were not working in my case, I have used one of http://www.paulschou.com/tools/xlate/ that works fine on php side but translated with your js equivalents gave a string with NaN and zeroes..

Your version of bin2hex is buggy and returns a shorter string length due to missing prepending zeroes for low bytes (ie those of value < 0x10). Note that an user has provided a patched version of ord that seems to take this into acccount and with this one, Paul schou's bin2hex equivalent may work on the js side.

Here is the patched and commented version, Enjoy. Linuxworld

/**
*@name bin2hex
*@brief Convert binary data into hexadecimal representation
*@version 2.0
*@requires str_repeat
*@note
* V1.0 - original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
* V1.1 - bugfixed by: Onno Marsman
* V2.0 (18.11.2008) 2 digits for low bytes fix by Linuxworld
*@see http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_bin2hex/
*@internal Similar to recursive ord or encodeuri without %. Be warned encodeuri or encodeuricomponent
* are buggy on both JS/PHP sides. An attempt to reproduce encodeUri was made here http://www.captain.at/howto-php-urlencode-javascript-decodeURIComponent.php but its encoding/decoding
*table is incomplete and thus not as much reliable than bin2hex.
* For all escaping stuff to retrieve hex values: http://xkr.us/articles/javascript/encode-compare/
*@example
* example 1: bin2hex('Kev');
* returns 1: '4b6576'
*@param String s a binary string (ie one given after base64_decode call for sample)
*@return String the hexadecimal representation of the given string.
**/
function bin2hex(s){

var v,i, f = 0, a = [];
s += '';
f = s.length;
for(i = 0; i<f; i++){
v= s.charCodeAt(i).toString(16);
a[i] =str_repeat("0", 2-v.toString().length)+v; //ensures 2 digit code for bytes!
}
return a.join('');
}

Linuxworld
18 Nov '08

   Hello Kevin,

First, nice job and big thanks for sharing this kind of stuff: JS and PHP worth to be closer thanks to equivalents.

Before fixing your bin2hex function that were not working in my case, I have used one of http://www.paulschou.com/tools/xlate/ that works fine on php side but translated with your js equivalents gave a string with NaN and zeroes..

Your version of bin2hex is buggy and returns a shorter string length due to missing prepending zeroes for low bytes (ie those of value < 0x10). Note that an user has provided a patched version of ord that seems to take this into acccount and with this one, Paul schou's bin2hex equivalent may work on the js side.

Here is the patched and commented version, Enjoy. Linuxworld

/**
*@name bin2hex
*@brief Convert binary data into hexadecimal representation
*@version 2.0
*@requires str_repeat
*@note
* V1.0 - original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
* V1.1 - bugfixed by: Onno Marsman
* V2.0 (18.11.2008) 2 digits for low bytes fix by Linuxworld
*@see http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_bin2hex/
*@internal Similar to recursive ord or encodeuri without %. Be warned encodeuri or encodeuricomponent
* are buggy on both JS/PHP sides. An attempt to reproduce encodeUri was made here http://www.captain.at/howto-php-urlencode-javascript-decodeURIComponent.php but its encoding/decoding
*table is incomplete and thus not as much reliable than bin2hex.
* For all escaping stuff to retrieve hex values: http://xkr.us/articles/javascript/encode-compare/
*@example
* example 1: bin2hex('Kev');
* returns 1: '4b6576'
*@param String s a binary string (ie one given after base64_decode call for sample)
*@return String the hexadecimal representation of the given string.
**/
function bin2hex(s){

var v,i, f = 0, a = [];
s += '';
f = s.length;
for(i = 0; i<f; i++){
v= s.charCodeAt(i).toString(16);
a[i] =str_repeat("0", 2-v.toString().length)+v; //ensures 2 digit code for bytes!
}
return a.join('');
}

Greg Copenhaver
9 May '08

   I attempted to use your bin2hex() function, but had a problem with it in my situation (Javascript LM hashes - http://gcopenhaver.com/node/94). Some characters in the string that I was passing to were 0x0f and lower, and this function does not include the first '0' for any of those, causing problems if it's not at the beginning of the string. Here's a function from http://tero.co.uk/des/code.php that will include the '0' if a byte is 0x0f or less. In my use, I removed the '0x' prefix that was set in this function. This is the code as copied from the des.js file. I don't know anything about the licensing of this code.

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function stringToHex (s) {
  var r = "0x";
  var hexes = new Array ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
  for (var i=0; i<s.length; i++) {r += hexes [s.charCodeAt(i) >> 4] + hexes [s.charCodeAt(i) & 0xf];}
  return r;}