Android安全检查之assets下文件进行加密

小咪咪 2022-04-24 00:50 456阅读 0赞

###  加密效果图 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTcwNjQxNQ_size_16_color_FFFFFF_t_70][]

### 解密效果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTcwNjQxNQ_size_16_color_FFFFFF_t_70 1][]

### 实现代码 ###

package com.xinli.wenet.utils;
    
    import android.util.Log;
    
    import com.xinli.wenet.base.MyApplication;
    
    import java.io.BufferedReader;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.FileReader;
    import java.io.IOException;
    import java.io.InputStream;
    
    /**
     * 作者 Created by maxd
     * 邮箱 maxd@nroad.com.cn
     * 时间 on 2019/4/11 0011
     */
    public class CryptUtil {
        //文件名称
        private static final String CONFIG_PROPERTIES = "config.json";
        //输出地址
        private static final String OUTPUT_FILE_PATH = "C:\\Users\\Administrator\\Desktop\\project\\";
        //输入地址
        private static final String INPUT_FILE_PATH = "C:\\Users\\Administrator\\Desktop\\apk\\";
    
    
        /**
         * 获取解密后的数据
         *
         * @param eCode 传入加密过的数据
         */
        private static String getEString(String eCode) {
            StringBuilder builder = new StringBuilder();
            long lenth = eCode.length();
            for (int i = 0; i < lenth; i++) {
                builder.append((char) (eCode.charAt(i) - i % 5));
            }
            return builder.toString();
        }
    
        /**
         * 获取assets下文件进行加密处理
         */
        public static String getEncryptProperty(String filename) {
    
            InputStream is = null;
            ByteArrayOutputStream outStream = null;
            try {
                is = MyApplication.getAppContext().getAssets().open(filename);
                outStream = new ByteArrayOutputStream();
                byte[] data = new byte[1024];
                int count = -1;
                while ((count = is.read(data, 0, 1024)) != -1) {
                    outStream.write(data, 0, count);
                }
                Log.i("getEncryptProperty", "load file encode start...");
                String encode = new String(outStream.toByteArray(), "UTF-8");
                //获取解密字符串
                String stringNative = CryptUtil.getEString(encode);
                Log.i("getEncryptProperty", "load file encode end..." + stringNative);
                return stringNative;
            } catch (IOException e) {
                Log.i("getEncryptProperty", "load file encode end..." + e.toString());
                e.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                        is = null;
                    }
                    if (outStream != null) {
                        outStream.close();
                        outStream = null;
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }
    
        /**
         * @param inputPath  输入路径
         * @param outputPath 输出路径
         * @return 是否加密文件成功
         */
        private static boolean encodeFile(String inputPath, String outputPath) {
            File localFile = new File(inputPath);
            try {
                if (!localFile.exists()) {
                    return false;
                }
                StringBuilder builder = new StringBuilder();
                BufferedReader in = new BufferedReader(new FileReader(localFile));
                String line = "";
                while ((line = in.readLine()) != null) {
                    if (!line.trim().startsWith("#") && !line.trim().equals("")) {
                        builder.append(line + '\n');
                    }
                }
                System.out.print("AA..:" + builder.toString());
                generateFile(builder2Encode(builder.toString()), outputPath);
                return true;
            } catch (IOException e) {
                e.printStackTrace();
            }
            return false;
        }
    
        /**
         * 产生加密文件
         *
         * @param text     要加密的数据
         * @param filePath 输出路径
         */
        private static void generateFile(String text, String filePath) {
            try {
                File file = new File(filePath);
                if (!file.exists()) {
                    File dir = new File(file.getParent());
                    dir.mkdirs();
                    file.createNewFile();
                } else {
                    file.delete();
                    File dir = new File(file.getParent());
                    dir.mkdirs();
                    file.createNewFile();
                }
                FileOutputStream outStream = new FileOutputStream(file);
                outStream.write(text.getBytes("UTF-8"));
                outStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        /**
         * 产生加密数据
         *
         * @param eString 要加密的数据
         * @return 加密后的数据
         */
        private static String builder2Encode(String eString) {
            StringBuilder builder = new StringBuilder();
            long lenth = eString.length();
            for (int i = 0; i < lenth; i++) {
                builder.append((char) (eString.charAt(i) + i % 5));
            }
            System.out.println("=========encode string======================");
            System.out.print("AA..:\\" + builder.toString());
            return builder.toString();
        }
    
    
        public static void main(String[] args) {
            boolean encodeFile = encodeFile(INPUT_FILE_PATH + CONFIG_PROPERTIES,
                    OUTPUT_FILE_PATH + CONFIG_PROPERTIES);
            System.out.println("result-------" + encodeFile);
        }
    }

有问题请留言

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTcwNjQxNQ_size_16_color_FFFFFF_t_70 1]: /images/20220221/c2787e675c4f4b46a0c65ab3df9eed5f.png