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/* c-basic-offset: 2; tab-width: 2; indent-tabs-mode: nil
* vi: set shiftwidth=2 tabstop=2 expandtab:
* :indentSize=2:tabSize=2:noTabs=true:
*/
package common;
import org.bouncycastle.jcajce.provider.digest.*;
import org.bouncycastle.util.encoders.*;
import java.security.MessageDigestSpi;
public class
Utils {
private Utils () {};
/**
* A hash function that salts the password
* in a way that is pseudo dynamic.
*
* @param t the text to salt
* @param s the salt
* @return
*/
static public String
real_hash_func (String t, String s) {
int a = t.getBytes()[0];
int b = t.getBytes()[a%t.length()];
StringBuilder sb = new StringBuilder ();
sb.append (t).insert (b, s);
SHA3.DigestSHA3 md = new SHA3.DigestSHA3 (2048);
try {
md.update (sb.toString().getBytes("UTF-8"));
} catch (Exception e) {
md.update (sb.toString().getBytes());
}
return Hex.toHexString (md.digest ());
}
/**
* Hash a text with a salt.
*
* @param t
* @return
*/
static public String
hash_func (String t) {
return real_hash_func(t, common.Config.PW_SALT);
}
}
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