Differential D30445 Diff 89789 share/man/man9/crypto_buffer.9

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share/man/man9/crypto_buffer.9

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	.Fc			.Fc
	.Ft void			.Ft void
	.Fo crypto_cursor_copydata_noadv			.Fo crypto_cursor_copydata_noadv
	.Fa "struct crypto_buffer_cursor *cc"			.Fa "struct crypto_buffer_cursor *cc"
	.Fa "int size"			.Fa "int size"
	.Fa "void *dst"			.Fa "void *dst"
	.Fc			.Fc
	.Ft void *			.Ft void *
				.Fn crypto_cursor_segment "struct crypto_buffer_cursor cc" "size_t len"
				.Ft void *
	.Fn crypto_cursor_segbase "struct crypto_buffer_cursor *cc"			.Fn crypto_cursor_segbase "struct crypto_buffer_cursor *cc"
	.Ft size_t			.Ft size_t
	.Fn crypto_cursor_seglen "struct crypto_buffer_cursor *cc"			.Fn crypto_cursor_seglen "struct crypto_buffer_cursor *cc"
	.Ft bool			.Ft bool
	.Fn CRYPTO_HAS_OUTPUT_BUFFER "struct cryptop *crp"			.Fn CRYPTO_HAS_OUTPUT_BUFFER "struct cryptop *crp"
	.Sh DESCRIPTION			.Sh DESCRIPTION
	Symmetric cryptographic requests use data buffers to describe the data to			Symmetric cryptographic requests use data buffers to describe the data to
	be modified.			be modified.
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	bytes.			bytes.
	.Pp			.Pp
	.Fn crypto_cursor_copydata_noadv			.Fn crypto_cursor_copydata_noadv
	is similar to			is similar to
	.Fn crypto_cursor_copydata			.Fn crypto_cursor_copydata
	except that it does not change the current position of			except that it does not change the current position of
	.Fa cc .			.Fa cc .
	.Pp			.Pp
				.Fn crypto_cursor_segment
				returns the start of the virtually-contiguous segment at the current position of
				.Fa cc .
				The length of the segment is stored in
				.Fa len .
				.Pp
	.Fn crypto_cursor_segbase			.Fn crypto_cursor_segbase
	and			and
	.Fn crypto_cursor_seglen			.Fn crypto_cursor_seglen
	return the start and length, respectively,			return the start and length, respectively,
	of the virtually-contiguous segment at the current position of			of the virtually-contiguous segment at the current position of
	.Fa cc .			.Fa cc .
	.Sh RETURN VALUES			.Sh RETURN VALUES
	.Fn crypto_apply			.Fn crypto_apply
	and			and
	.Fn crypto_apply_buf			.Fn crypto_apply_buf
	return the return value from the caller-supplied callback function.			return the return value from the caller-supplied callback function.
	.Pp			.Pp
	.Fn crypto_buffer_contiguous_subsegment ,			.Fn crypto_buffer_contiguous_subsegment ,
	.Fn crypto_contiguous_subsegment ,			.Fn crypto_contiguous_subsegment ,
	and
	.Fn crypto_cursor_segbase ,			.Fn crypto_cursor_segbase ,
				and
				.Fn crypto_cursor_segment
	return a pointer to a contiguous segment or			return a pointer to a contiguous segment or
	.Dv NULL .			.Dv NULL .
	.Pp			.Pp
	.Fn crypto_buffer_len			.Fn crypto_buffer_len
	returns the length of a buffer in bytes.			returns the length of a buffer in bytes.
	.Pp			.Pp
	.Fn crypto_cursor_seglen			.Fn crypto_cursor_seglen
	returns the length in bytes of a contiguous segment.			returns the length in bytes of a contiguous segment.
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