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how to store message digest for string in mysql database and retrieve it

prasuna yegurla
Greenhorn

Joined: Aug 12, 2009
Posts: 3
[size=12]Hi every one i tried to create message digest created for string and store it into database like this
public static String encrypt(String str) {
StringBuffer encryptedResult = new StringBuffer();
String strWithSalt = salt str;

try {
MessageDigest md = MessageDigest.getInstance(encrptionAlgorithm);
md.update(strWithSalt.getBytes());
byte[] digest = md.digest();

for (byte b : digest) {
int number = b;
// Convert negative numbers
number = (number < 0) ? (number 256) : number;
encryptedResult.append(Integer.toHexString(number));
}

} catch (NoSuchAlgorithmException ex) {
System.out.println(ex.toString());
}

return encryptedResult.toString();
}

please suggest some solution abut which datatype i have to use to store and retrieve this hexadecimal value...
Jeanne Boyarsky
author & internet detective
Marshal

Joined: May 26, 2003
Posts: 31634
    
189

Prasuna,
Welcome to JavaRanch!

It would be varchar or clob depending on how big the digest is. I forgot how many characters a message digest is. (I could look it up, but I'm sure you know.) Varchar is typically used up to 255 characters. CLOB is more.


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