the library is not thread-safe

[quhaige]

We are using the lib inside a mulitply-threads context and found it is not thread-safe. There are global variables are using to optimized some internal parameters delivery.
For instance:
static state_t* state;
static uint8_t RoundKey[keyExpSize];
static const uint8_t* Key;
After remove them, lib are working propertly under mulitply-threads.

[kokke]

Hi @quhaige thanks for your interest in the project :)

You are right that static variables do not work well with multithreading.
An easy fix is to move all variables inside a struct and pass it to the encryption/decryption functions.

Check out this pull request with the same goal:
#9

[quhaige]

thanks, wish u have good day^^