ㅇ. 소스코드
public class CFB_OFB {
public static void encSSN(String input)
throws Exception {
// key값 구함
KeyGenerator keygenerator = KeyGenerator.getInstance("DES");
keygenerator.init(new SecureRandom());
SecretKey key = keygenerator.generateKey();
// key값으로 암호화함(CFB or OFB)
Cipher cipher = Cipher.getInstance("DES/CFB/NoPadding");
//Cipher cipher = Cipher.getInstance("DES/OFB/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] plainTextBytes = input.getBytes("UTF-8");
byte[] cipherTextBytes= cipher.doFinal(plainTextBytes);
System.out.println("plainTextString[" + input + "]");
System.out.println("plainTextBytes.length[" + plainTextBytes.length + "]");
System.out.println("cipherTextBytes.length[" + cipherTextBytes.length + "]");
}
public static void main(String[] args) {
// 파라미터 확인
if (args.length != 1) {
System.out.println("해쉬 할 내용을 입력해 주세요. ex)plainText hoho");
return;
}
String arg = args[0];
try {
encSSN(arg);
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
ㅇ. 실행화면
