package com.cvt.smarthome.utils;import java.security.MessageDigest;public class Digest {public static String getMD5(String source) {return getChecksum(source, "MD5");}public static String getMD5(byte[] source) {return getChecksum(source, "MD5");}public static String getSha1(String source) {return getChecksum(source, "SHA-1");}public static String getSha1(byte[] source) {return getChecksum(source, "SHA-1");}public static String getSha256(String source) {return getChecksum(source, "SHA-256");}public static String getSha256(byte[] source) {return getChecksum(source, "SHA-256");}public static String getChecksum(String source, String encName) {return getChecksum(source.getBytes(), encName);}public static String getChecksum(byte[] source, String encName) {String ret = null;char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a','b', 'c', 'd', 'e', 'f' };try {MessageDigest sha = MessageDigest.getInstance(encName);sha.update(source);byte checksum[] = sha.digest();char c_check[] = new char[2 * checksum.length];for (int i = 0; i < checksum.length; i++) {byte val = checksum[i];c_check[i * 2] = hex[(val >>> 4) & 0x0f];c_check[i * 2 + 1] = hex[val & 0x0f];}ret = new String(c_check);} catch (Exception e) {e.printStackTrace();}return ret;}}
