rijndaelDecrypt
int rijndaelDecrypt(u_int8_t a[16], u_int8_t b[16], u_int8_t rk[RIJNDAEL_MAXROUNDS+1][4][4], int ROUNDS);
rijndaelDecrypt(input, outBuffer, key->keySched, key->ROUNDS);
rijndaelDecrypt(input, block, key->keySched, key->ROUNDS);
rijndaelDecrypt(input, outBuffer, key->keySched, key->ROUNDS);
rijndaelDecrypt(input, block, key->keySched, key->ROUNDS);
rijndaelDecrypt(input, block, key->keySched, key->ROUNDS);
rijndaelDecrypt(input, block, key->keySched, key->ROUNDS);