hash - Java MessageDigest MD5 Not Returning Expected Outcome -


i got extremely bored i'm making experimental brute forcer. i'm having issues md5 however. i'm getting 2 different outputs,

1aabac6d068eef6a7bad3fdf50a05cc8 -7d881f6ef28afe6a4bb78689e91f6e53

the first 1 valid , dd, second 1 invalid, if remove leading hyphen.

i looking @ this answer , adjusted had solved primary issue i'm still getting invalid md5s.

my code:

public boolean testvalidity(string s) {     try {         messagedigest md = messagedigest.getinstance(name());         byte[] hashdigest = md.digest(s.getbytes("utf-8"));         string hash = string.format("%032x", new biginteger(md.digest(s.getbytes("utf-8"))));         system.out.println(hash);         return getcompare().equalsignorecase(hash);     } catch (nosuchalgorithmexception | unsupportedencodingexception | nullpointerexception e) {         e.printstacktrace();         return false;     } }

in above, name() gets "md5" , getcompare() gets hash compare against.

my question is, how can fix code make sure md5s valid?

your biginteger constructor uses twos complement. use sign/magnitude variant instead first parameter 1. http://docs.oracle.com/javase/7/docs/api/java/math/biginteger.html#biginteger(int,%20byte[])


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