Hashing Code [Java] [SHA1]

[drudown500]

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SHA1Encryption {

public static String SHA1(String text) throws NoSuchAlgorithmException,
UnsupportedEncodingException {
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(text.getBytes("iso-8859-1"), 0, text.length());
byte[] sha1hash = md.digest();
return convertToHex(sha1hash);
}

private static String convertToHex(byte[] data) {
StringBuilder buf = new StringBuilder();
for (byte b : data) {
int halfbyte = (b >>> 4) & 0x0F;
int two_halfs = 0;
do {
buf.append((0 <= halfbyte) && (halfbyte <= 9) ? (char) ('0' + halfbyte)
: (char) ('a' + (halfbyte - 10)));
halfbyte = b & 0x0F;
} while (two_halfs++ < 1);
}
return buf.toString();
}

}

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