java - Java加密不会在Android上解密

好的，因此，当我加密任何内容时，在这种情况下，请使用计算机说一个文件。它可以很好地加密和解密所述文件。但是，如果用我的计算机加密文件，然后也将其发送给我的android并运行与我编写的解密代码相同的解密代码，则无法正确解密文件。它没有显示任何错误，但是显然文件没有正确解密。

因此，我了解到Bouncy Castle与JVM / JDK标准加密库完全不同，因此我不确定100％是否是问题所在。但是，这是有道理的。问题是，如果是这样，我不知道如何在我的android上使用JVM / JDK库进行加密。我也不想在计算机上使用Bouncy Castle库。

public static void encrypt(File source, File dest, String password){
    try{
        FileInputStream inFile = new FileInputStream(source.getPath());
        FileOutputStream outFile = new FileOutputStream(dest.getPath());

        byte[] salt = new byte[8], iv = new byte[16];

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 65536, 256);
        SecretKey secretKey = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(secretKey.getEncoded(), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(iv));

        byte[] input = new byte[64];
        int bytesRead;

        while((bytesRead = inFile.read(input)) != -1){
            byte[] output = cipher.update(input, 0, bytesRead);
            if(output != null){
                outFile.write(output);
            }
        }

        byte[] output = cipher.doFinal();
        if(output != null){
            outFile.write(output);
        }

        inFile.close();
        outFile.flush();
        outFile.close();
    }catch(Exception e){
        e.printStackTrace();
    }
}

public static void decrypt(File source, File dest, String password){
    try{
        byte[] salt = new byte[8], iv = new byte[16];

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 65536, 256);
        SecretKey tmp = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));
        FileInputStream fis = new FileInputStream(source.getPath());
        FileOutputStream fos = new FileOutputStream(dest.getPath());
        byte[] in = new byte[64];
        int read;
        while((read = fis.read(in)) != -1){
            byte[] output = cipher.update(in, 0, read);
            if(output != null){
                fos.write(output);
            }
        }

        byte[] output = cipher.doFinal();
        if(output != null){
            fos.write(output);
        }
        fis.close();
        fos.flush();
        fos.close();
    }catch(Exception e){
        e.printStackTrace();
    }
}

结果是，也可以使用标准的JVM / JDK加密库使用我的计算机对任何文件进行加密，并且也可以使用我的android解密相同的文件。

但是，如果除了Bouncy Castle之外还有其他库可以与android一起使用，则我欢迎您提出建议。

最佳答案

我也遇到过类似的问题。首先检查您的加密和解密设置是否正确。

如果可以，则应将加密的文本转换为Base64或类似的编码。

然后先在移动设备上解码Base64编码，然后解密文件。

发生此问题的原因是，某些字符不适合在介质之间进行保存或传输。它们还受到基础操作系统的影响。即使更改了一点，您整个解密的文本也将更改，在这里可能就是这种情况

机器人代码

public static void decrypt(File source, File dest, String password){
    try{
        Base64InputStream fis = new Base64InputStream(new DataInputStream(new FileInputStream(source.getPath())), Base64.DEFAULT);
        FileOutputStream fos = new FileOutputStream(dest.getPath());


        byte[] salt = new byte[8], iv = new byte[16];

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 65536, 256);
        SecretKey tmp = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));

        byte[] in = new byte[64];
        int read;
        while((read = fis.read(in)) != -1){
            byte[] output = cipher.update(in, 0, read);
            if(output != null){
                fos.write(output);
            }
        }

        byte[] output = cipher.doFinal();
        if(output != null){
            fos.write(output);
        }
        fis.close();
        fos.flush();
        fos.close();
    }catch(Exception e){
        e.printStackTrace();
    }
}

常规JVM

public static void encrypt(File source, File dest, String password){
    try{
        FileInputStream inFile = new FileInputStream(source.getPath());
        OutputStream outFile = Base64.getEncoder().wrap(new FileOutputStream(dest.getPath()));

        byte[] salt = new byte[8], iv = new byte[16];

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 65536, 256);
        SecretKey secretKey = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(secretKey.getEncoded(), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(iv));

        byte[] input = new byte[64];
        int bytesRead;

        while((bytesRead = inFile.read(input)) != -1){
            byte[] output = cipher.update(input, 0, bytesRead);
            if(output != null){
                outFile.write(output);
            }
        }

        byte[] output = cipher.doFinal();
        if(output != null){
            outFile.write(output);
        }

        inFile.close();
        outFile.flush();
        outFile.close();
    }catch(Exception e){
        e.printStackTrace();
    }
}

public static void decrypt(File source, File dest, String password){
    try{
        InputStream fis = Base64.getDecoder().wrap(new FileInputStream(source.getPath()));
        //FileInputStream fis = new FileInputStream(source.getPath());
        FileOutputStream fos = new FileOutputStream(dest.getPath());

        byte[] salt = new byte[8], iv = new byte[16];

        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt, 65536, 256);
        SecretKey tmp = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));

        byte[] in = new byte[64];
        int read;
        while((read = fis.read(in)) != -1){
            byte[] output = cipher.update(in, 0, read);
            if(output != null){
                fos.write(output);
            }
        }

        byte[] output = cipher.doFinal();
        if(output != null){
            fos.write(output);
        }
        fis.close();
        fos.flush();
        fos.close();
    }catch(Exception e){
        e.printStackTrace();
    }
}

关于java - Java加密不会在Android上解密，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58724102/