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Android中資料的加密解密

開發中我們經常會和伺服器打交道:最終的目的就是和資料打交道,但是這往往出現一個問題就是

資料的安全性問題,比如說我們把資料發送給伺服器,伺服器傳回資料給我們,

這其中牽涉到很重要的安全性問題:分3步來解決這個問題

1:首先我們建立一個類用來加密和解密如下所示:

*
 * Created by acer-pc on 2018/6/22.
 */

public class EncryptUtil {

    private static final String ALGORITHM = "AES/ECB/PKCS5Padding";

    // 加密秘鑰
    private static final String AES_KEY = "XXX(我們自己設定)";

    private static SecretKeySpec secretKeySpec;

    /**
     * 前台傳輸資料解密
     *
     * @param rawJson 原始JSON
     * @return 解密後的Map
     */
    public static <T extends BaseResult> T decrypt(String rawJson, Class<T> tClass) {

        T result=null;

        try {
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, getAesKey());
            byte[] paramBytes = cipher.doFinal(Base64.decode(rawJson.getBytes("UTF-8"), Base64.NO_WRAP));
            String paramJson = new String(paramBytes);
            result = GsonUtil.fromJson(paramJson, tClass);
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        return result;
    }

    /**
     * 資料傳輸過程中需要加密設定
     * @param rawMap
     * @return
     */

    public static String encrypt(Map<String, String> rawMap) {
        String result = "";

        try {
            Cipher cipher = Cipher.getInstance(ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, getAesKey());

            String rawJson = GsonUtil.toJson(rawMap);
            byte[] paramBytes = cipher.doFinal(rawJson.getBytes("UTF-8"));
            result = Base64.encodeToString(paramBytes, Base64.NO_WRAP);
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        return result;
    }

    private static SecretKeySpec getAesKey() {
        if (secretKeySpec != null) {
            return secretKeySpec;
        }
        try {
            secretKeySpec = new SecretKeySpec(AES_KEY.getBytes("UTF-8"), "AES");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        return secretKeySpec;
    }
}
           

2:其中的BaseResult如下(要解析的資料的根類,放資料的類要繼承這個類):

public class BaseResult {

    private int result;
    private String message;

    public int getResult() {
        return result;
    }

    public void setResult(int result) {
        this.result = result;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}
           

3:當我們在主類中(或者Fragment中)使用的時候如下:

//加載資料
public void initData() {
    //這裡利用線程池使得線程線上程池中運作防止程式卡死
    APIConfig.getDataIntoView(new Runnable() {
        @Override
        public void run() {
            Map<String, String> map = new HashMap<>();
            map.put("token", RuntimeConfig.user.getToken());
            String paramJson = EncryptUtil.encrypt(map);
            String url = "http://這裡是我們的目标網址";
            String rs = HttpUtil.GetDataFromNetByPost(url,
                    new ParamsBuilder().addParam("paramJson", paramJson).getParams());
            // rs判空
            final DiaryDetailResult result = EncryptUtil.decrypt(rs, DiaryDetailResult.class);

            UIUtils.runOnUIThread(new Runnable() {
                @Override
                public void run() {
                    //這裡禁用
                    if (result != null && result.getResult() == APIConfig.CODE_SUCCESS) {
                        Diary diaryData = result.getData().getContent();
                        //接下來對解析出的資料進行自己的操作
                        。。。。。。。。。。。。

                    } else {
                      // Toast彈出加載失敗;
                    }
                }
            });
        }
    });
}
           

3:大功告成!

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