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Thread: AESCrypt - Very slow file encryption

  1. #1
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    Lightbulb AESCrypt - Very slow file encryption

    Dear, I'm using AESCrypt to keep the encrypted music and videos in my Player.

    I used the following function to encrypt all media directory

    	public static void encryptMusic(){
    		String args1[] = new String[4];
    		args1[0] = "e"; // encrypt
    		args1[1] = "pass";
    		AESCrypt aes;
     
    		File filecryptss = new File("/home/dinho/midiasOLD");
     
    		File fList[] = filecryptss.listFiles();
     
    		for ( int i = 0; i < fList.length; i++ ){
    			args1[2] = "/home/dinho/midiasOLD/" + fList[i].getName();
    			args1[3] = "/home/dinho/midias/" + fList[i].getName();;
    			try {
    				aes = new AESCrypt(false, args1[1]);
    				aes.criptografar(args1);
    			} catch (UnsupportedEncodingException e2) {
    				// TODO Auto-generated catch block
    				e2.printStackTrace();
    			} catch (GeneralSecurityException e2) {
    				// TODO Auto-generated catch block
    				e2.printStackTrace();
    			};
     
    			System.out.println("Arquivo criptografado: " + fList[i].getName()); 
    			System.out.println("Deletando arquivo: " + fList[i].getName() + "..."); 
    			fList[i].delete(); // deleto o arquivo para não ocupar espaço
     
    		}
     
    		System.exit(0);
     
    	}

    At run time, do the decryption putting a new file as tmp just to run.

    String args1[] = new String[4];
    args1[0] = "d"; // decrypt
    args1[1] = "pass";
    args1[2] = "/home/dinho/midias/video.avi";
    args1[3] = "/home/dinho/midias/tmp_video.avi";
    AESCrypt aes;
    try {
    aes = new AESCrypt(false, args1[1]);
    aes.criptografar(args1);
    } catch (UnsupportedEncodingException e2) {
    // TODO Auto-generated catch block
    e2.printStackTrace();
    } catch (GeneralSecurityException e2) {
    // TODO Auto-generated catch block
    e2.printStackTrace();
    };


    After running the tmp file, it is removed from the directory.

    The problem I face is that when selecting a video file, depending on size, can take up to one minute only to decrypt.

    The question is:
    Is there a way to decrypt without the need to create a new physical file?
    I'm at least on the right track or is there a better way to do this whole process?


  2. #2
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    Default Re: AESCrypt - Very slow file encryption

    AESCrypt is a third-party library; found here: Using AES Crypt - Advanced File Encryption for Java
    Please always inform us of such facts in future posts.

    The answer is that it all depends on how the AESCrypt library is implemented. Does the library only work with temp files? or is that your own 'hack'?
    Decrypting large media files is never going to be instant really.
    Please use [highlight=Java]//code goes here...[/highlight] tags when posting your code

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