Visible to Intel only — GUID: GUID-37D11113-4C5C-4EB1-B8F3-A9FFDB78FBCD
Visible to Intel only — GUID: GUID-37D11113-4C5C-4EB1-B8F3-A9FFDB78FBCD
SM4 CCM Algorithm Functions
Functions described in this section can be used for the CCM operational mode of SM4 cipher systems.
The implementation supports up to 16 buffers of input data. The implementation uses a context to keep intermediate results between calls.
Valid call sequence:
mbx_sm4_ccm_init_mb16
mbx_sm4_ccm_update_aad_mb16 (optional)
mbx_sm4_ccm_encrypt_mb16/mbx_sm4_ccm_decrypt_mb16 (optional, can be called as many times as necessary)
mbx_sm4_ccm_get_tag_mb16
Call sequence restrictions:
If mbx_sm4_ccm_update_aad_mb16 is called, you cannot call it again.
If mbx_sm4_ccm_encrypt_mb16 or mbx_sm4_ccm_decrypt_mb16 is called, you cannot call mbx_sm4_ccm_update_aad_mb16.
At step four:
functions can be called as many times as needed to process the payload. These functions process buffers with full blocks (of 16 bytes size) or empty buffers and the length of the processed payload is not overflowed.
if functions are called to process a partial block, you cannot call it again.
If mbx_sm4_ccm_encrypt_mb16 is called, you cannot call mbx_sm4_ccm_decrypt_mb16.
If mbx_sm4_ccm_decrypt_mb16 was called, you cannot call mbx_sm4_ccm_encrypt_mb16.