1KCAPI_AKCIPHER_STREA(3)      Programming Interface     KCAPI_AKCIPHER_STREA(3)
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NAME

6       kcapi_akcipher_stream_init_dec - start an decryption operation (stream)
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SYNOPSIS

9       int32_t kcapi_akcipher_stream_init_dec(struct kcapi_handle * handle,
10                                              struct iovec * iov,
11                                              uint32_t iovlen);
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ARGUMENTS

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

29       A stream decryption operation is started with this call. Multiple
30       successive kcapi_akcipher_stream_update function calls can be invoked
31       to send more plaintext data to be decrypted. The last invocation to
32       supply data must be done with kcapi_akcipher_stream_update_last. The
33       kernel buffers the input until kcapi_akcipher_stream_op picks up the
34       encrypted data. Once plaintext is decrypted during the
35       kcapi_cipher_stream_op it is removed from the kernel buffer.
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37       The function calls of kcapi_akcipher_stream_update and
38       kcapi_akcipher_stream_op can be mixed, even by multiple threads of an
39       application.
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41       return number of bytes sent to the kernel upon success; a negative
42       errno-style error code if an error occurred
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AUTHOR

45       Stephan Mueller <smueller@chronox.de>
46           Author.
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49libkcapi Manual 1.1.1             August 2018          KCAPI_AKCIPHER_STREA(3)
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