rijndaelKeySetupDec
if (rijndaelKeySetupDec(ctx->dk, key, bits) != rounds)
int rijndaelKeySetupDec(unsigned int [], const unsigned char [], int);
if (rijndaelKeySetupDec(ctx->dk, key, bits) != rounds)
int rijndaelKeySetupDec(unsigned int [], const unsigned char [], int);