JAVA AES128 암호화 복호화 소스

JAVA AES128 암호화 복호화 소스

package test;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;


public class FirstApp {

 public static void main(String[] args) throws Exception {
  // TODO Auto-generated method stub
  
  FirstApp f = new FirstApp(); 
  
  System.out.println(f.encrypt("TEST08"));
  
 }
 private final String KEYNAME = "nfaator!plaeemo!";
 private final String ALGORITHM = "AES";
 public static final String AES_ECB_NOPADDING = "AES/ECB/NoPadding";
  
 public String encrypt(final String source) throws Exception {
     byte[] eArr = null;
     SecretKeySpec skeySpec = new SecretKeySpec(KEYNAME.getBytes(), ALGORITHM);
     Cipher cipher = Cipher.getInstance(AES_ECB_NOPADDING);
     cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
     eArr = cipher.doFinal(this.addPadding(source.getBytes()));
     return fromHex(eArr);
 }
     public byte[] encryptToByteArray(final String source) throws Exception {
        byte[] eArr = null;
        SecretKeySpec skeySpec = new SecretKeySpec(KEYNAME.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(AES_ECB_NOPADDING);
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        eArr = cipher.doFinal(this.addPadding(source.getBytes()));
        return eArr;
     }
     
     public String GetEncryptString(String source) throws Exception {
        StringBuilder sbResult = new StringBuilder();
        byte[] eArr = null;
        SecretKeySpec skeySpec = new SecretKeySpec(KEYNAME.getBytes(), ALGORITHM);
        Cipher cipher = Cipher.getInstance(AES_ECB_NOPADDING);
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        eArr = cipher.doFinal(this.addPadding(source.getBytes()));
        for (byte b : eArr) {
                  sbResult.append(String.format("%02x", b));
        }
        return sbResult.toString();
     }
     public String decrypt(final String source) throws Exception {
        Cipher cipher = Cipher.getInstance(AES_ECB_NOPADDING);
        SecretKeySpec skeySpec = new SecretKeySpec(KEYNAME.getBytes(), ALGORITHM);
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        byte[] eArr = this.removePadding(cipher.doFinal(this.toBytes(source)));
        return new String(eArr);
     }
     private byte[] removePadding(final byte[] pBytes) {
        int pCount = pBytes.length;
        int index = 0;
        boolean loop = true;
        while (loop) {
                  if (index == pCount || pBytes[index] == 0x00) {
                             loop = false;
                             index--;
                  }
                  index++;
        }
        byte[] tBytes = new byte[index];
        System.arraycopy(pBytes, 0, tBytes, 0, index);
        return tBytes;
     }
     private byte[] toBytes(final String pSource) {
        StringBuffer buff = new StringBuffer(pSource);
        int bCount = buff.length() / 2;
        byte[] bArr = new byte[bCount];
        for (int bIndex = 0; bIndex < bCount; bIndex++) {
                  bArr[bIndex] = (byte) Long.parseLong(buff.substring(2 * bIndex, (2 * bIndex) + 2), 16);
        }
        return bArr;
     }
     private byte[] addPadding(final byte[] pBytes) {
        int pCount = pBytes.length;
        int tCount = pCount + (16 - (pCount % 16));
        byte[] tBytes = new byte[tCount];
        System.arraycopy(pBytes, 0, tBytes, 0, pCount);
        for (int rIndex = pCount; rIndex < tCount; rIndex++) {
                  tBytes[rIndex] = 0x00;
        }
        return tBytes;
     }
     public String fromHex(byte[] pBytes) {
   int pCount = pBytes.length;
   StringBuffer buff = new StringBuffer(pCount * 2);
   for (int pIndex = 0; pIndex < pCount; pIndex++) {
             if (((int) pBytes[pIndex] & 0xff) < 0x10) {
                       buff.append(0);
             }
             buff.append(Long.toString((int) pBytes[pIndex] & 0xff, 16));
   }
   return buff.toString();
     }
}

[출처] C# JAVA AES128 암호화 복호화 소스|작성자 실버캐슬