ALBERT SITE

이번 출시된 앱 심사시 앱통신간 데이타중 중요정보 및 sqlite에 저장되는 데이타중

그대로 저장되면 않되는 부분들이 있어서 암호화 작업을 하게 되었다.

다행히 ios단은 아직 별도로 체크하지않아서 우선 안드로이드 단만하였는데 생각보다 쉬웟다.

안드로이드 단 암호화 부분 클래스

public class EncryptUtility {

    public static final String KeyValue = "xxxkey";


    public String Dec(String text) {
        String result = text;
        try {
            result = Decrypt(text);
        } catch (Exception e) {}
        return result;
    }

    public String Enc(String text) {
        String result = text;
        try {
            result = Encrypt(text);
        } catch (Exception e) {}
        return result;
    }

    public String Decrypt(String text) throws Exception
    {

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        byte[] keyBytes= new byte[16];

        byte[] b= KeyValue.getBytes("UTF-8");

        int len= b.length;

        if (len > keyBytes.length) len = keyBytes.length;

        System.arraycopy(b, 0, keyBytes, 0, len);

        SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");

        IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);

        cipher.init(Cipher.DECRYPT_MODE,keySpec,ivSpec);

        byte [] results = cipher.doFinal(Base64.decode(text, 0));

        return new String(results ,"UTF-8");

    }

    public static String Encrypt(String text) throws Exception
    {

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

        byte[] keyBytes= new byte[16];

        byte[] b= KeyValue.getBytes("UTF-8");

        int len= b.length;

        if (len > keyBytes.length) len = keyBytes.length;

        System.arraycopy(b, 0, keyBytes, 0, len);

        SecretKeySpec keySpec = new SecretKeySpec(keyBytes, "AES");

        IvParameterSpec ivSpec = new IvParameterSpec(keyBytes);

        cipher.init(Cipher.ENCRYPT_MODE,keySpec,ivSpec);

        byte[] results = cipher.doFinal(text.getBytes("UTF-8"));

        return Base64.encodeToString(results, 0);

    }
}

닷넷단 클래스

public static class EncyptUtil
    {
        private const string PasswordKey = "xxxkey";
        /// 

        /// AES to Base64 암호화
        /// 
        /// 
        /// 
        /// 
        public static string EncryptString(string text)
        {
           
            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            rijndaelCipher.Mode = CipherMode.CBC;
            rijndaelCipher.Padding = PaddingMode.PKCS7;
 
            rijndaelCipher.KeySize = 128;
            rijndaelCipher.BlockSize = 128;
            byte[] pwdBytes = Encoding.UTF8.GetBytes(PasswordKey);
            byte[] keyBytes = new byte[16];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
            {
                len = keyBytes.Length;
            }
            Array.Copy(pwdBytes, keyBytes, len);
            rijndaelCipher.Key = keyBytes;
            rijndaelCipher.IV = keyBytes;
            ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
            byte[] plainText = Encoding.UTF8.GetBytes(text);
            return Convert.ToBase64String(transform.TransformFinalBlock(plainText, 0, plainText.Length));

        }

        /// 

        /// AES to Base64 복호화
        /// 
        /// 
        /// 
        public static string DescryptString(string text)
        {
           
            RijndaelManaged rijndaelCipher = new RijndaelManaged();
            rijndaelCipher.Mode = CipherMode.CBC;
            rijndaelCipher.Padding = PaddingMode.PKCS7;
 
            rijndaelCipher.KeySize = 128;
            rijndaelCipher.BlockSize = 128;
            byte[] encryptedData = Convert.FromBase64String(text);
            byte[] pwdBytes = Encoding.UTF8.GetBytes(PasswordKey);
            byte[] keyBytes = new byte[16];
            int len = pwdBytes.Length;
            if (len > keyBytes.Length)
            {
                len = keyBytes.Length;
            }
            Array.Copy(pwdBytes, keyBytes, len);
            rijndaelCipher.Key = keyBytes;
            rijndaelCipher.IV = keyBytes;
            byte[] plainText = rijndaelCipher.CreateDecryptor().TransformFinalBlock(encryptedData, 0, encryptedData.Length);
            return Encoding.UTF8.GetString(plainText);

        }
    }

참고로 이미 ios, c샵, android 에 모두 적용되는 소스도 있엇다.

요즘 찾으면 웬만한건 다있어 개발하기 편하다. 예전처럼 책살필요도 없고 

오늘도 기분좋게 벌써 5시넘어가네 퇴근준비  하하하^^