1. Encrypt And Decrypt String
2. Xor Encrypt Decrypt Php Online

I wrote this code in C# to encrypt a string with a key:

The problem is that I always get error when I want to decrypt an encryted text with this code:

Any clues?

I have been looking around for an algorithm that will encrypt a string and decrypt a string using a key. This would require 4 functions that impliment the same algorithm in. World's simplest XOR decryptor. Just paste XOR-encoded text in the form below, enter password, press XOR Decrypt button, and you get decrypted text. Encrypt or decrypt XOR using our free online tool, it works with hexadecimal, binary and text. Easy Encryption and Decryption with PHP. Ask Question. Up vote 8 down vote. As such, you can just do a direct lookup on that field. (i.e.: Having encrypt and decrypt part of the URL is probably overkill.) share improve this answer. Answered Dec 13. XOR does what you want, but it does not prevent accessing sequential values (and the key.

CodesInChaos

Gmp_xor (PHP 4 >= 4.0.4, PHP 5, PHP 7). Maintaining unique keys for each encryption at both encryption and decryption points to ensure 100 percent unbreakability. I get bored last night and wrote a script that uses xor for encrypt- decrypt, however it woks fine under linux 2.6.25, text and documents are ok, but fails on compressed files *.jpg, *.pdf, etc.

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3 Answers

If you have a character, a char, you can convert it to an integer, an int.

And then you can use the ^ operator to perform XOR on it. You don't appear to be using that operator at the moment, which might be the source of your problem.

That kind of thing. Here's a longer version with comments that does the same thing in steps, to make it easier to learn from:

The short version is the same but with the intermediate variables removed, substituting expressions directly into where they're used.

Daniel EarwickerDaniel EarwickerBert F

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I am studying encryption. And I got a problem like this:

After I XOR plaintext with a key, I get a crypt, '010e010c15061b4117030f54060e54040e0642181b17', as hex type. If I want to get plaintext from this crypt, what should I do in PHP?

Encrypt And Decrypt String

I tried convert it to string/int and after that take them to XOR with the key (three letters). But it doesn't work.

This is the code:

Xor Encrypt Decrypt Php Online

Epson ub u03ii driver windows 10. And this is the result:

This is the test-------------

PHP Notice: Uninitialized string offset: 29 in C: UsersAdministratorDesktoptest.php on line 210 PHP Stack trace: PHP 1. {main}() C:UsersAdministratorDesktoptest.php:0 PHP 2. xor_this() C:UsersAdministratorDesktoptest.php:239

Notice: Uninitialized string offset: 29 in C:UsersAdministratorDesktoptest.p hp on line 210

Call Stack: 0.0005 674280 1. {main}() C:UsersAdministratorDesktoptest.php:0 0.0022 674848 2. xor_this() C:UsersAdministratorDesktoptest.php:23 9

UBE^A►WEAVA►WEAV@◄WEARAFWECWB++++++++

This is zs$fs☺

Why? The 'UBE^A►WEAVA►WEAV@◄WEARAFWECWB++++++++' is the result, which I got trouble in my real work.

Peter MortensenJoeNguyenJoeNguyen

3 Answers

Try this:

Basically to revert text back (even numbers are in) you can use the same function:

Peter MortensenOne Man CrewOne Man CrewPeter Mortensen

Based on the code above i created 2 functions to xor encode a JSON string using javascript and then decode it on server side using PHP.

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!!! Important: If you will have characters different from ASCII(like Chinese, Cyrillic, Symbols..) in your JSON string, you must either write some code in PHP or JS to fix how these characters are encoded/decoded (ord/chr in PHP produce different results in comparison with JS charCodeAt/String.fromCharCode) or just base64_encode the JSON string and after that xor encode it.

Personally i use xor_string(base64_encode(JSON.stringify(object)), 'xor_key') in JS and on PHP side:

PHP:

Javascript:

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