9
Sep

Easy MD5 Encryption In JSP

Posted by: Varma
in Programming

As a few of you may know, it is pretty easy to encrypt plain text using MD5. It can be acheived just by calling the function md5(”plaintext”).

But when I recently started working on a Java-based web application, I realised that its not as easy to do it in JSP. So after a bit of research and looking around, I found a cool, simple solution to this problem. Here is the sample code which you can use in your JSP file or a Bean to do the encryption. (You need to import java.security.MessageDigest for this to work.)

String plainText = “root”;
MessageDigest md = MessageDigest.getInstance(”MD5″);
md.update(plainText.getBytes());

byte[] digest = md.digest();
StringBuffer hexString = new StringBuffer();

for (int i = 0; i < digest.length; i++) {
plainText = Integer.toHexString(0xFF & digest[i]);

if (plainText.length() < 2) {
plainText = “0″ + plainText;
}

hexString.append(plainText);
}

out.print(hexString.toString());

This can be a very effective way to encrypt passwords (after accepting them with the FORM POST method) before storing them in the database. Hope this little script will help atleast a few.

-Varma

6 users responded to " Easy MD5 Encryption In JSP "

"Easy MD5 Encryption In JSP" was posted by Varma and received 6 user comments
MyAvatars 0.2
adarshgopi said,         
May 1 2008

its good… how can i decrypt it?

MyAvatars 0.2
adarshgopi said,         
May 1 2008

reply me about the decryption

MyAvatars 0.2
guru said,         
May 1 2008

MD5 is a one-way hash function, it cannot be decrypted.

MyAvatars 0.2
osobo said,         
February 17 2009

????? ?????? ???????? ?? ????????? ?? ???? ????? ?. ?????

????? ?????? “????????” ???, ??? ?????? ??????????? ? ???????? ???????? ?? ?? ??????? ??????????? ?????? ???????? ?????????????????? ?????? ?.?. ?????.
?????????????? ?? ?????? ??????, ? ????-?? “?????” ?????????? ??????? ?????? “?????????” ??? ?????, ??????? ???????? ???????? ? ????????????? ???? ????????? ??????????.
???????? “????????” ? ?????????? ??????? - ??? ????????, ??????? ??????? ???????? ?? ?????. ????? ???? ??????????? “?????? ???????” ? ???????? ???????????? ??? ????????????? ????????????, ????????????? ????????? ?????, ? ????, ???? ??????????? ???.
????? ??????? ?????????? ?????? ????????? 1 ????? ??????????-????????? ????? ? 9 ?????????? ?? ????????? ????????????? ???? ?????????? ??????? ?? ???????? ?????????? ????????????? ??????? ?.?. ???????.
? ??? ??? ? ?? ?????, ????? ????????? ??? ?????? ???????? ?????????????????? ??????? ? ??????????? ???? ?????????? ???????? ?????? ? ???????? ???????. ? ??? ????? ??????? ????????? ? ??????????? ????? “? ???????” - ?? ?????? 11 ????? ?????? ????????? ?????? 25 ? 35, ?? ????????? ??????? ????? ?????????????????? ?????? ????? ????? ????????? ?????????-????????????? ???????????? ???????????.
?????, ?? ?????????? ???????????? ???????????????? ??????? ?????????????????? ?????? ?? ??????????. ? ?? ??????? ???????????? ? ????????????? ??????????.
????? ????, ??? ?????????? ????????? ?? ? ?????????? ???????? ??????????, ? ????? ? ???????? ? ?????????? ???????????? ????????????????

MyAvatars 0.2
madyy87 said,         
March 23 2009

thanks a ton!!

MyAvatars 0.2
santhoshkn said,         
December 23 2009

hey thanks a lot brother… :)
you made my day! merry christmas and happy new year! god bless u :)

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Hello my name is Sunil varma. Welcome to my blog, and you're welcome to stay as long as you want.

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