java.security.*MessageDigestクラスの簡単なアプリケーションMD 5暗号化をパッケージ化
1906 ワード
MD5 , 。
* , , MD5
*/
public class MD5andKL{
//MD5 。32
public static String MD5(String inStr) {
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
} catch (Exception e) {
System.out.println(e.toString());
e.printStackTrace();
return "";
}
char[] charArray = inStr.toCharArray();
byte[] byteArray = new byte[charArray.length];
for (int i = 0; i < charArray.length; i++)
byteArray[i] = (byte) charArray[i];
byte[] md5Bytes = md5.digest(byteArray);
StringBuffer hexValue = new StringBuffer();
for (int i = 0; i < md5Bytes.length; i++) {
int val = ((int) md5Bytes[i]) & 0xff;
if (val < 16)
hexValue.append("0");
hexValue.append(Integer.toHexString(val));
}
return hexValue.toString();
}
//
public static String KL(String inStr){
//String s = new String(inStr);
char[] a = inStr.toCharArray();
for (int i = 0;i <a.length;i++) {
a[i] = (char)(a[i]^'t');
}
String s=new String(a);
return s;
}
//
public static String JM(String inStr){
char[] a=inStr.toCharArray();
for (int i = 0;i <a.length;i++) {
a[i]= (char)(a[i]^'t');
}
String k=new String(a);
return k;
}
//
public static void main (String args[]){
String s = new String("admin");
System.out.println(" :"+s);
System.out.println("MD5 :"+MD5(s));
System.out.println("MD5 :"+KL(MD5(s)));
System.out.println(" MD5 :"+JM(KL(MD5(s))));
}