?? encryptutils.java
字號:
package util;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* String encryption utility methods.
*
* @author <a href="mailto:rana_b@yahoo.com">Rana Bhattacharyya</a>
*/
public
class EncryptUtils {
/**
* Encrypt byte array.
*/
public static byte[] encrypt(byte[] source, String algorithm) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance(algorithm);
md.reset();
md.update(source);
return md.digest();
}
/**
* Encrypt string
*/
public static String encrypt(String source, String algorithm) throws NoSuchAlgorithmException {
byte[] resByteArray = encrypt(source.getBytes(), algorithm);
return StringUtils.toHexString(resByteArray);
}
/**
* Encrypt string using MD5 algorithm
*/
public static String encryptMD5(String source) {
if (source == null) { source = ""; }
String result = "";
try {
result = encrypt(source, "MD5");
}
catch(NoSuchAlgorithmException ex) {
ex.printStackTrace();
}
return result;
}
/**
* Encrypt string using SHA algorithm
*/
public static String encryptSHA(String source) {
if (source == null) { source = ""; }
String result = "";
try {
result = encrypt(source, "SHA");
}
catch(NoSuchAlgorithmException ex) {
ex.printStackTrace();
}
return result;
}
}
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