1KCAPI_CIPHER_STREAM_(3)      Programming Interface     KCAPI_CIPHER_STREAM_(3)
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NAME

6       kcapi_cipher_stream_init_dec - start a decryption operation (stream)
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SYNOPSIS

9       int32_t kcapi_cipher_stream_init_dec(struct kcapi_handle * handle,
10                                            const uint8_t * iv,
11                                            struct iovec * iov,
12                                            uint32_t iovlen);
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ARGUMENTS

15       handle
16           [in] cipher handle
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18       iv
19           [in] IV to be used for cipher operation
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21       iov
22           [in] scatter/gather list with data to be encrypted. This is the
23           pointer to the first iov entry if an array of iov entries is
24           supplied. See sendmsg(2) for details on how iov is to be used. This
25           pointer may be NULL if no data to be encrypted is available at the
26           point of the call.
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28       iovlen
29           [in] number of scatter/gather list elements. If iov is NULL, this
30           value must be zero.
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DESCRIPTION

33       A stream decryption operation is started with this call. Multiple
34       successive kcapi_cipher_stream_update function calls can be invoked to
35       send more ciphertext data to be decrypted. The kernel buffers the input
36       until kcapi_cipher_stream_op picks up the decrypted data. Once
37       ciphertext is decrypted during the kcapi_cipher_stream_op it is removed
38       from the kernel buffer.
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40       The function calls of kcapi_cipher_stream_update and
41       kcapi_cipher_stream_op can be mixed, even by multiple threads of an
42       application.
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44       The IV buffer must be exactly kcapi_cipher_ivsize bytes in size.
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46       return number of bytes sent to the kernel upon success; a negative
47       errno-style error code if an error occurred
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AUTHOR

50       Stephan Mueller <smueller@chronox.de>
51           Author.
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54libkcapi Manual 1.2.0             August 2020          KCAPI_CIPHER_STREAM_(3)
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