//package com.googlecode.propidle.util;
import static java.lang.String.format;
import java.security.MessageDigest;
import java.math.BigInteger;
/*
Based on http://www.anyexample.com/programming/java/java_simple_class_to_compute_sha_1_hash.xml
*/
public class Sha1 {
public static String sha1(String text) {
try {
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(text.getBytes("iso-8859-1"), 0, text.length());
return convertToHex(md.digest());
} catch (Exception e) {
throw new Exception(format("Problem hashing %s", text), e);
}
}
private static String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9))
buf.append((char) ('0' + halfbyte));
else
buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
} while (two_halfs++ < 1);
}
return buf.toString();
}
}
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