kcapi_aead_stream_update_last — send last data for processing (stream)
int32_t kcapi_aead_stream_update_last ( | struct kcapi_handle * handle, |
| struct iovec * iov, | |
uint32_t iovlen); |
handle[in] cipher handle
iov[in] scatter/gather list with data to be processed by the cipher operation.
iovlen[in] number of scatter/gather list elements.
Using this function call, more plaintext for encryption or ciphertext for decryption can be submitted to the kernel.
This call is identical to the kcapi_aead_stream_update call with the
exception that it marks the last data buffer before the cipher operation
is triggered. Typically, the tag value is provided with this call.
The memory referenced by iov is not accessed by the kernel
during this call. The memory is first accessed when kcapi_cipher_stream_op
is called. Thus, you MUST make sure that the referenced memory is still
present at the time kcapi_cipher_stream_op is called.
return number of bytes sent to the kernel upon success;
a negative errno-style error code if an error occurred