bionic (3) kcapi_cipher_decrypt_aio.3.gz

NAME

       kcapi_cipher_decrypt_aio - decrypt data (asynchronous one shot)

SYNOPSIS

       int32_t kcapi_cipher_decrypt_aio(struct kcapi_handle * handle, struct iovec * iniov,
                                        struct iovec * outiov, uint32_t iovlen, const uint8_t * iv, int access);

ARGUMENTS

       handle
           [in] cipher handle

       iniov
           [in] head of scatter-gather list array holding the ciphertext

       outiov
           [out] head of scatter-gather list with the destination buffers for the plaintext

       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 decrypted upon success; a negative errno-style error code if an error occurred

AUTHOR

       Stephan Mueller <smueller@chronox.de>
           Author.

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