1KCAPI_CIPHER_ENCRYPT(3)      Programming Interface     KCAPI_CIPHER_ENCRYPT(3)
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NAME

6       kcapi_cipher_encrypt - encrypt data (synchronous one shot)
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SYNOPSIS

9       ssize_t kcapi_cipher_encrypt(struct kcapi_handle * handle,
10                                    const uint8_t * in, size_t inlen,
11                                    const uint8_t * iv, uint8_t * out,
12                                    size_t outlen, int access);
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ARGUMENTS

15       handle
16           [in] cipher handle
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18       in
19           [in] plaintext data buffer
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21       inlen
22           [in] length of in buffer
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24       iv
25           [in] IV to be used for cipher operation
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27       out
28           [out] ciphertext data buffer
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30       outlen
31           [in] length of out buffer
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33       access
34           [in] kernel access type (KCAPI_ACCESS_HEURISTIC - use internal
35           heuristic for fastest kernel access; KCAPI_ACCESS_VMSPLICE - use
36           vmsplice access; KCAPI_ACCESS_SENDMSG - sendmsg access)
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DESCRIPTION

39       It is perfectly legal to use the same buffer as the plaintext and
40       ciphertext pointers. That would mean that after the encryption
41       operation, the plaintext is overwritten with the ciphertext.
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43       The memory should be aligned at the page boundary using
44       posix_memalign(sysconf(_SC_PAGESIZE)), If it is not aligned at the page
45       boundary, the vmsplice call may not send all data to the kernel.
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47       The IV buffer must be exactly kcapi_cipher_ivsize bytes in size.
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49       return number of bytes encrypted upon success; a negative errno-style
50       error code if an error occurred
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AUTHOR

53       Stephan Mueller <smueller@chronox.de>
54           Author.
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57libkcapi Manual 1.4.0              July 2023           KCAPI_CIPHER_ENCRYPT(3)
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