Not quite right of MD5

Hiya.

I'm porting the code php I wore originally from Python which implies the hash of a password and salt together in MD5, which works very well for the PHP and Python, but it is not working properly in java.
I took the salt that 2 other programs use to test and it's right half but the moment that the MessageDigest Digest, it changes.

I use the following in java:

MessageDigest m = MessageDigest.getInstance ("MD5");
m.Reset ();
String saltString = convertHexToString (salt);
System.out.println (saltString);
String passwordAndSalt = saltString + password;
m.Update (passwordAndSalt.GetBytes ("UTF8"));
ubyte bytes [] = m.digest ();

to do
$pwHash = md5 ($salt. $password, true);
$pw = strtoupper (bin2hex ($pwHash));
in php, and
m = md5.new)
m.Update (Salt)
m.Update (Password)
return m.digest)

in Python.

Byte [] produced by the MessageDigest is different from the format raw PHP and the result of pythons, which means that the HEXADECIMAL value that results is different, and I can't understand why.
Any help would be appreciated. Thank you

String saltString = convertHexToString (salt);

If you have salt in hexadecimal and you are converting it to a string.

System.out.println (saltString);
String passwordAndSalt = saltString + password;
m.Update (passwordAndSalt.GetBytes ("UTF8"));

And here you convert this back to bytes after you add the password.

Don't, don't. String is not a container for binary data. Use an array of byte []. Use two, one for the salt and the other for the password and call update() once with each.

Tags: Java

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