NAME

       kcapi_akcipher_stream_init_sgn - start an signing operation (stream)

SYNOPSIS

       ssize_t kcapi_akcipher_stream_init_sgn(struct kcapi_handle * handle, struct iovec * iov,
                                              size_t iovlen);

ARGUMENTS

       handle
           [in] cipher handle

       iov
           [in] scatter/gather list with data to be signed. This is the pointer to the first iov
           entry if an array of iov entries is supplied. See sendmsg(2) for details on how iov is
           to be used. This pointer may be NULL if no data to be signed is available at the point
           of the call.

       iovlen
           [in] number of scatter/gather list elements. If iov is NULL, this value must be zero.

DESCRIPTION

       A stream signing operation is started with this call. Multiple successive
       kcapi_akcipher_stream_update function calls can be invoked to send more plaintext data to
       be signed. The last invocation to supply data must be done with
       kcapi_akcipher_stream_update_last. The kernel buffers the input until
       kcapi_akcipher_stream_op picks up the signed data. Once plaintext is signed during the
       kcapi_cipher_stream_op it is removed from the kernel buffer.

       The function calls of kcapi_akcipher_stream_update and kcapi_akcipher_stream_op can be
       mixed, even by multiple threads of an application.

       return number of bytes sent to the kernel upon success; a negative errno-style error code
       if an error occurred

AUTHOR

       Stephan Mueller <smueller@chronox.de>
           Author.

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