* This function computes the keyschedule from a given key with a given length
* and stores it in the context variable
* \param key pointer to the key material
* \param keysize_b length of the key in bits (valid are 128, 192 and 256)
* \param ctx pointer to the context where the keyschedule should be stored
*/
* This function computes the keyschedule from a given key with a given length
* and stores it in the context variable
* \param key pointer to the key material
* \param keysize_b length of the key in bits (valid are 128, 192 and 256)
* \param ctx pointer to the context where the keyschedule should be stored
*/