B4J Library [Tool] File encryption/decryption

I needed to encrypt and decrypt files in a B4J server project, so since I had to do it anyway, I spent some extra time developing this tool (using B4J, of course).

 

[LucaMs]

Only now do I "see" a couple of things I could add:

• Drag & Drop
• Opening the destination folder

P.S. Done: https://www.b4x.com/android/forum/threads/tool-file-encryption-decryption.172186/post-1052891

 

[TILogistic]

What happens if the user forgets the encryption password?

 

[LucaMs]

What happens if the user forgets the encryption password?

It depends on the content of the file he encrypted.
He might not care or he might commit suicide, I suppose

Joking aside, I don't suppose you mean the tool should save the password?!

 

[aeric]

Maybe he means a question like asking your pet's name.

 

[TILogistic]

or a technique I have used a few times

a mnemonic acronym or a mnemonic phrase based on the first letters.

For example, with:

“A Red Fox Found A Key Under A Tree And Ran To The Mountain.”

You take the first letter of each word:

A R F F A K U A T A R T T M

And you can transform it into:

ARFFAKUATARTTM7!

Another technique is to keep some words intact and use initials for the others:

RedFox!FKUATTM7

The advantage is that you remember the original phrase, not the string of characters directly.

 

[LucaMs]

or a technique I have used a few times

a mnemonic acronym or a mnemonic phrase based on the first letters.

For example, with:

“A Red Fox Found A Key Under A Tree And Ran To The Mountain.”

You take the first letter of each word:

A R F F A K U A T A R T T M

And you can transform it into:

ARFFAKUATARTTM7!

Another technique is to keep some words intact and use initials for the others:

RedFox!FKUATTM7

The advantage is that you remember the original phrase, not the string of characters directly.

Well, that is a "mental task" that the person using it should (could) perform.

 

[LucaMs]

Maybe he means a question like asking your pet's name.

If you do that, it's like using that name directly as the password and it would be easily discovered.

 

[LucaMs]

Only now do I "see" a couple of things I could add:

• Drag & Drop
• Opening the destination folder

Done

It's really hard to see, I know!

 

[Daestrum]

FYI Luca, no members in UK see the images as imgur.com is blocked (unless they use VPN etc)

 

[LucaMs]

FYI Luca, no members in UK see the images as imgur.com is blocked (unless they use VPN etc)

Not even in the rest of the world, because the image is too small

 

[LucaMs]

FYI Luca, no members in UK see the images as imgur.com is blocked (unless they use VPN etc)

Let me briefly describe it to you.

I’ve added those two features:

• Drag & Drop
• Opening the destination folder

Now:

• You can drag a file onto the tool instead of selecting it via "Choose File".
• Clicking on the selected file's name opens the folder containing it.

That’s all, but it’s useful.

 

[LucaMs]

FYI Luca, no members in UK see the images as imgur.com is blocked (unless they use VPN etc)

[/URL]

 

[Sergio83]

Hi LucaMs very good job! I cannot see the attached zip file even when logged in. Could you please check it?"


.

 

[LucaMs]

Hi LucaMs very good job! I cannot see the attached zip file even when logged in. Could you please check it?"


.

I didn't publish it; I wanted to see if the members would find it interesting.
I think most of them wouldn't.

Also, right now I'm considering whether it would be better to "restructure" the project; currently all the code is in `Main`, but I want to break it down into classes, since I need the decryption part for use in another project.