kcapi_aead_encrypt_aio — asynchronously encrypt AEAD data (one shot)
int32_t kcapi_aead_encrypt_aio ( | struct kcapi_handle * handle, |
| struct iovec * iniov, | |
| struct iovec * outiov, | |
| uint32_t iovlen, | |
| const uint8_t * iv, | |
int access); |
handle[in] cipher handle
iniov[in] array of scatter-gather list with input buffers
outiov[out] array of scatter-gather list with output buffers
iovlen[in] number of IOVECs in array
iv[in] IV to be used for cipher operation
access[in] kernel access type (KCAPI_ACCESS_HEURISTIC - use internal heuristic for fastest kernel access; KCAPI_ACCESS_VMSPLICE - use vmsplice access; KCAPI_ACCESS_SENDMSG - sendmsg access)
The AEAD cipher operation requires the furnishing of the associated authentication data. In case such data is not required, it can be set to NULL and length value must be set to zero.
Each IOVEC is processed with its individual AEAD cipher operation. The memory holding the input data will receive the processed data.
The memory should be aligned at the page boundary using posix_memalign(sysconf(_SC_PAGESIZE)), If it is not aligned at the page boundary, the vmsplice call may not send all data to the kernel.
The IV buffer must be exactly kcapi_cipher_ivsize bytes in size.
After invoking this function the caller should use
kcapi_aead_getdata_output to obtain the resulting ciphertext and
authentication tag references.