Visible to Intel only — GUID: GUID-764D9484-731D-4207-87ED-17583FE6F53C
Visible to Intel only — GUID: GUID-764D9484-731D-4207-87ED-17583FE6F53C
mbx_sm4_ccm_encrypt/decrypt_mb16
Encrypts plaintext (ccm_encrypt) and decrypts ciphertext (ccm_decrypt).
Syntax
mbx_status16 mbx_sm4_ccm_encrypt_mb16(int8u* pa_out[SM4_LINES], const int8u* const pa_in[SM4_LINES], const int in_len[SM4_LINES], SM4_CCM_CTX_mb16* p_context);
mbx_status16 mbx_sm4_ccm_decrypt_mb16(int8u* pa_out[SM4_LINES], const int8u* const pa_in[SM4_LINES], const int in_len[SM4_LINES], SM4_CCM_CTX_mb16* p_context);
Include Files
crypto_mb/sm4_ccm.h
Parameters
pa_out |
Array of pointers to the output data streams. |
pa_in |
Array of pointers to the input data streams. |
in_len |
Array of lengths of the input data in bytes. |
p_context |
Pointer to the context to keep intermediate results between calls. |
Description
These functions encrypt/decrypt the input data streams passed by pa_in of a variable length (up to 2^32 -1 bytes) passed through the in_len array according to the CCM cipher scheme and store the results into the memory buffers specified in the pa_out parameter. The unctions also update the context with an intermediate hash value.
Return Values
The mbx_sm4_ccm_encrypt_mb16/mbx_sm4_ccm_decrypt_mb16() functions return the status that indicates whether the operation is completed successfully or not. The status value of 0 indicates that the key schedule is successfully initialized. In case of a 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 mbx_status16, which can be analyzed separately with the MBX_GET_STS() call. The low part includes the first eight statuses, while the high part includes the remaining eight statuses for each operation.