Incompatibility with Arduino XXTEA

[pedros89]

This library seems incompatible with Arduino XXTEA.
The application was to send an encrypted data from Arduino via POST request and decrypt it in PHP.
Arduino XXTEA used

The two libraries decode in different ways it seems.

Look at the picture below, you see how the ecrypted string in Arduino is
d49baa5e4b9b6ee6c8cf5ab0a61baa7a
But the encrypted string in PHP xxtea is a bounch of awful stuff:
�,�„'—ÍÌIˆ(¦HL�ìF0do
Look at the screenshot, on the right there is the Arduino serial monitor encrypting with its XXTEA and on the left PHP encrypting with your XXTEA

Maybe converting those buch of waful stuff from HEX to string I can have a result.

[andot]

try to use this one: https://github.com/xxtea/xxtea-c

[pedros89]

Thank you,
I tried it but I have conversions errors. (see image)
Never mind. I think I'll leave XXTEA

I have decide to move to RC4 encryption and I hope I will be luckier.

RC4 encryption between Arduino and PHP

[andot]

You can cast the char * type to void * using (const void*)text

[pedros89]

Thank you for your help, I would then need the data to be stored in a string to use it.
I have not clear what I have to cast as void*. If you could write the line of code it would help. Also for then converting it to char array and then to string.
Anyway, I will give it a try in the future, but for now I made everything with RC4 algo as explained here below.
https://stackoverflow.com/a/69390303/13795525