mbx_sm4_set_key_mb16
mbx_sm4_set_key_mb16
Initializes multi buffer key schedule to provide all necessary key material for both encryption and decryption operations.
Syntax
mbx_status16 mbx_sm4_set_key_mb16(mbx_sm4_key_schedule*
key_sched
, const sm4_key*
pa_key
[SM4_LINES]);
Include Files
crypto_mb/sm4.h
Parameters
- key_sched
- Pointer to key schedule being initialized.
- pa_key
- Array of pointers to the SM4 secret keys.
Description
Sets up
mbx_sm4_key_schedule
key schedule pointed by key_sched
using user-supplied secret keys passed through pa_key
with all necessary key material for both encryption and decryption operations.Return Values
The
mbx_sm4_set_key_mb16()
function returns the status that indicates whether the operation completed successfully or not. The status value of 0 indicates that the key schedule was successfully initialized. In case of non-zero status value,
MBX_GET_HIGH_PART_STS16()
and
MBX_GET_LOW_PART_STS16()
can help to get the low and high parts of the mbx_status16, which can be analyzed separately with
MBX_GET_STS()
call. The low part includes first eight statuses, while the high part includes remaining 8 statuses for each operation.