| KCAPI_AKCIPHER_DECRY(3) | Programming Interface | KCAPI_AKCIPHER_DECRY(3) |
NAME¶
kcapi_akcipher_decrypt_aio - decrypt data (asynchronous one shot)
SYNOPSIS¶
ssize_t kcapi_akcipher_decrypt_aio(struct kcapi_handle * handle, struct iovec * iniov, struct iovec * outiov, size_t iovlen, 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
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.
return number of bytes decrypted upon success; a negative errno-style error code if an error occurred
AUTHOR¶
Stephan Mueller <smueller@chronox.de>
Author.
COPYRIGHT¶
| March 2023 | libkcapi Manual 1.4.0 |