kcapi_cipher_encrypt_aio - Man Page
encrypt data (asynchronous one shot)
Synopsis
ssize_t kcapi_cipher_encrypt_aio(struct kcapi_handle * handle, struct iovec * iniov, struct iovec * outiov, size_t iovlen, const uint8_t * iv, int access);
Arguments
handle
[in] cipher handle
iniov
[in] head of scatter-gather list array holding the plaintext
outiov
[out] head of scatter-gather list of the destination buffers filled with ciphertext
iovlen
[in] number of scatter-gather list entries
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)
Description
The individual scatter-gather list entries are processed with separate invocations of the the given cipher.
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.
return number of bytes encrypted upon success; a negative errno-style error code if an error occurred
Author
Stephan Mueller <smueller@chronox.de>
Author.