ESP crashes if wrong key is used

[Hasi123]

If a wrong key is used to decrypt a message, the ESP crashes and restarts.
It seems that your library tries to access some part of the memory it shouldn't. I get this error:
Guru Meditation Error: Core 1 panic'ed (StoreProhibited). Exception was unhandled.

[homonto]

I don't have such problem - tested it just for you - it simply converts to trash the string or char