giai ma

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package giaimathu;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public final class at {
    private IvParameterSpec a = new IvParameterSpec(MyApplication.a.getBytes());
    private SecretKeySpec b = new SecretKeySpec(MyApplication.b.getBytes(),
            "AES");
    private Cipher c;

    public at() {
        try {
            this.c = Cipher.getInstance("AES/CBC/NoPadding");
            return;
        } catch (NoSuchAlgorithmException localNoSuchAlgorithmException) {
            localNoSuchAlgorithmException.printStackTrace();
            return;
        } catch (NoSuchPaddingException localNoSuchPaddingException) {
            localNoSuchPaddingException.printStackTrace();
        }
    }

//  private static byte[] b(String paramString) {
//      byte[] arrayOfByte = null;
//      if (paramString == null) {
//          return null;
//      } else {
//          while (true) {
//              int i = paramString.length();
//              arrayOfByte = null;
//              if (i < 2)
//                  continue;
//              int j = paramString.length() / 2;
//              arrayOfByte = new byte[j];
//              for (int k = 0; k < j; k++)
//                  arrayOfByte[k] = (byte) Integer.parseInt(
//                          paramString.substring(k * 2, 2 + k * 2), 16);
//              return arrayOfByte;
//          }
//      }
//  }

    public final byte[] a(String paramString) {
        if ((paramString == null) || (paramString.length() == 0)) {
            return null;
        } else {
            try {
                this.c.init(2, this.b, this.a);
                byte[] arrayOfByte = this.c.doFinal(HexToBytes.fromHexString(paramString));
                return arrayOfByte;
            } catch (Exception localException) {
                return null;
            }
        }
    }
}