The same file is read and calculated MD5 with Php/python/javascript, the result is different, ask reason and solve method

The test code and results are as follows:

Php:

echo md5(file_get_contents('test.torrent'));//e699b0e7535cebc1b10de1613d6797fb

Python:

print hashlib.md5(open("test.torrent").read()).hexdigest()#7cc752c88ae69677afe59ee7c3300e9d

Javascript:

var dragAndDrop = function(){    if (!window.File || !window.FileList || !window.FileReader) {        return false;    }    var ignoreDrag = function(e) {        e.originalEvent.stopPropagation();        e.originalEvent.preventDefault();    }    var drop = function(e) {        ignoreDrag(e);        var dt = e.originalEvent.dataTransfer;        var droppedFiles = dt.files;        $.each(droppedFiles, function(index, file) {            decodeFile(file);        });    }    $('body')    .on('dragenter', ignoreDrag)    .on('dragover', ignoreDrag)    .on('drop', drop);};var decodeFile = function(file) {    var fileReader = new FileReader();    var fileData = fileReader.readAsBinaryString(file);    fileReader.onload = function(){        var fileData = this.result;        console.log(CryptoJS.MD5(fileData));    }}dragAndDrop(); //393fe44680d69ea00fd0a4a2fb3fa8c5

Reply content:

The test code and results are as follows:

Php:

echo md5(file_get_contents('test.torrent'));//e699b0e7535cebc1b10de1613d6797fb

Python:

print hashlib.md5(open("test.torrent").read()).hexdigest()#7cc752c88ae69677afe59ee7c3300e9d

Javascript:

var Draganddrop = function () {if (!window. File | | !window. FileList | | !window.    FileReader) {return false;        } var Ignoredrag = function (e) {e.originalevent.stoppropagation ();    E.originalevent.preventdefault ();        } var drop = function (e) {Ignoredrag (e);        var dt = E.originalevent.datatransfer;        var droppedfiles = dt.files;        $.each (droppedfiles, function (index, file) {decodefile (file);    }); } $ (' body '). On (' DragEnter ', Ignoredrag). On (' DragOver ', Ignoredrag). On (' drop ', drop);};    var decodefile = function (file) {var filereader = new FileReader ();    var fileData = filereader.readasbinarystring (file);        Filereader.onload = function () {var fileData = This.result;    Console.log (CRYPTOJS.MD5 (fileData)); }}draganddrop (); 393FE44680D69EA00FD0A4A2FB3FA8C5  

Depending on the information you added in the question comments, Python version 2 differs from the PHP version, which is easy to understand:

1. Python 2 Opens the file in the default text mode , and theWindows API processes some characters, causing the read data to be inconsistent;
2. The correct MD5 value is the one that PHP calculates. file_get_contentsis a binary safe;

3. The correct Python 2 & 3 code is as follows:

   hashlib.md5(open("test.torrent", 'rb').read()).hexdigest()

4. Cryptojs This thing is a third party. The questioner is not provided and therefore cannot be tested.

I did a bit of testing, two Python methods, a JavaScript approach, and a Linux shell command, and the MD5 are the same. PHP is not tested, but I believe it should be the same. Python method One:

import md5m = md5.new("xxx\n")print m.hexdigest()结果是：6de9439834c9147569741d3c9c9fc010

Python method Two:

import hashlibh = hashlib.md5("xxx\n")print h.hexdigest()结果也是：6de9439834c9147569741d3c9c9fc010

JavaScript MD5, I downloaded from this: http://www.myersdaily.org/joseph/javascript/md5.js, the 101th line has a syntax error, plus var. The result is the same as the result above.

Linux Shell:

md5sumxxx回车后按ctrl + D

The printed result is the same as above.

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