160 lines
4.3 KiB
Groff
160 lines
4.3 KiB
Groff
.\" Copyright (c) 2003 - 2005, 2007 Kungliga Tekniska Högskolan
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.\" (Royal Institute of Technology, Stockholm, Sweden).
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" 3. Neither the name of the Institute nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $Id: krb5_data.3 20040 2007-01-23 20:35:12Z lha $
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.\"
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.Dd Jan 23, 2007
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.Dt KRB5_DATA 3
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.Os HEIMDAL
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.Sh NAME
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.Nm krb5_data ,
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.Nm krb5_data_zero ,
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.Nm krb5_data_free ,
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.Nm krb5_free_data_contents ,
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.Nm krb5_free_data ,
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.Nm krb5_data_alloc ,
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.Nm krb5_data_realloc ,
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.Nm krb5_data_copy ,
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.Nm krb5_copy_data ,
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.Nm krb5_data_cmp
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.Nd operates on the Kerberos datatype krb5_data
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.Sh LIBRARY
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Kerberos 5 Library (libkrb5, -lkrb5)
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.Sh SYNOPSIS
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.In krb5.h
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.Pp
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.Li "struct krb5_data;"
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.Ft void
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.Fn krb5_data_zero "krb5_data *p"
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.Ft void
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.Fn krb5_data_free "krb5_data *p"
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.Ft void
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.Fn krb5_free_data_contents "krb5_context context" "krb5_data *p"
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.Ft void
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.Fn krb5_free_data "krb5_context context" "krb5_data *p"
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.Ft krb5_error_code
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.Fn krb5_data_alloc "krb5_data *p" "int len"
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.Ft krb5_error_code
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.Fn krb5_data_realloc "krb5_data *p" "int len"
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.Ft krb5_error_code
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.Fn krb5_data_copy "krb5_data *p" "const void *data" "size_t len"
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.Ft krb5_error_code
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.Fn krb5_copy_data "krb5_context context" "const krb5_data *indata" "krb5_data **outdata"
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.Ft krb5_error_code
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.Fn krb5_data_cmp "const krb5_data *data1" "const krb5_data *data2"
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.Sh DESCRIPTION
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The
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.Li krb5_data
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structure holds a data element.
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The structure contains two public accessible elements
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.Fa length
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(the length of data)
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and
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.Fa data
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(the data itself).
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The structure must always be initiated and freed by the functions
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documented in this manual.
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.Pp
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.Fn krb5_data_zero
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resets the content of
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.Fa p .
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.Pp
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.Fn krb5_data_free
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free the data in
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.Fa p
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and reset the content of the structure with
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.Fn krb5_data_zero .
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.Pp
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.Fn krb5_free_data_contents
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works the same way as
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.Fa krb5_data_free .
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The diffrence is that krb5_free_data_contents is more portable (exists
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in MIT api).
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.Pp
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.Fn krb5_free_data
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frees the data in
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.Fa p
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and
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.Fa p
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itself.
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.Pp
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.Fn krb5_data_alloc
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allocates
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.Fa len
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bytes in
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.Fa p .
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Returns 0 or an error.
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.Pp
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.Fn krb5_data_realloc
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reallocates the length of
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.Fa p
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to the length in
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.Fa len .
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Returns 0 or an error.
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.Pp
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.Fn krb5_data_copy
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copies the
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.Fa data
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that have the length
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.Fa len
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into
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.Fa p .
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.Fa p
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is not freed so the calling function should make sure the
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.Fa p
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doesn't contain anything needs to be freed.
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Returns 0 or an error.
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.Pp
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.Fn krb5_copy_data
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copies the
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.Li krb5_data
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in
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.Fa indata
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to
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.Fa outdata .
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.Fa outdata
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is not freed so the calling function should make sure the
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.Fa outdata
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doesn't contain anything needs to be freed.
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.Fa outdata
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should be freed using
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.Fn krb5_free_data .
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Returns 0 or an error.
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.Pp
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.Fn krb5_data_cmp
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will compare two data object and check if they are the same in a
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simular way as memcmp does it. The return value can be used for
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sorting.
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.Sh SEE ALSO
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.Xr krb5 3 ,
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.Xr krb5_storage 3 ,
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.Xr kerberos 8
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