aboutsummaryrefslogtreecommitdiff
path: root/lib/libgssapi/gss_get_mic.3
blob: 8892808f022d51bcbbcd27150e20544e96b328b5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
.\" -*- nroff -*-
.\"
.\" Copyright (c) 2005 Doug Rabson
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"	$FreeBSD$
.\"
.\" The following commands are required for all man pages.
.Dd January 26, 2010
.Os
.Dt GSS_GET_MIC 3 PRM
.Sh NAME
.Nm gss_get_mic ,
.Nm gss_sign
.Nd Calculate a cryptographic message integrity code (MIC) for a
message; integrity service
.\" This next command is for sections 2 and 3 only.
.\" .Sh LIBRARY
.Sh SYNOPSIS
.In "gssapi/gssapi.h"
.Ft OM_uint32
.Fo gss_get_mic
.Fa "OM_uint32 *minor_status"
.Fa "const gss_ctx_id_t context_handle"
.Fa "gss_qop_t qop_req"
.Fa "const gss_buffer_t message_buffer"
.Fa "gss_buffer_t msg_token"
.Fc
.Ft OM_uint32
.Fo gss_sign
.Fa "OM_uint32 *minor_status"
.Fa "const gss_ctx_id_t context_handle"
.Fa "gss_qop_t qop_req"
.Fa "gss_buffer_t message_buffer"
.Fa "gss_buffer_t msg_token"
.Fc
.Sh DESCRIPTION
Generates a cryptographic MIC for the supplied message,
and places the MIC in a token for transfer to the peer application.
The
.Fa qop_req
parameter allows a choice between several cryptographic algorithms,
if supported by the chosen mechanism.
.Pp
Since some application-level protocols may wish to use tokens emitted
by
.Fn gss_wrap
to provide "secure framing",
implementations must support derivation of MICs from zero-length messages.
.Pp
The
.Fn gss_sign
routine is an obsolete variant of
.Fn gss_get_mic .
It is
provided for backwards
compatibility with applications using the GSS-API V1 interface.
A distinct entrypoint (as opposed to #define) is provided,
both to allow GSS-API V1 applications to link
and to retain the slight parameter type differences between the
obsolete versions of this routine and its current form.
.Sh PARAMETERS
.Bl -tag
.It minor_status
Mechanism specific status code.
.It context_handle
Identifies the context on which the message will be sent.
.It qop_req
Specifies requested quality of protection.
Callers are encouraged, on portability grounds,
to accept the default quality of protection offered by the chosen
mechanism,
which may be requested by specifying
.Dv GSS_C_QOP_DEFAULT
for this parameter.
If an unsupported protection strength is requested,
.Fn gss_get_mic
will return a
.Fa major_status
of
.Dv GSS_S_BAD_QOP .
.It message_buffer
Message to be protected.
.It msg_token
Buffer to receive token.
The application must free storage associated with this buffer after
use with a call to
.Fn gss_release_buffer .
.El
.Sh RETURN VALUES
.Bl -tag
.It GSS_S_COMPLETE
Successful completion
.It GSS_S_CONTEXT_EXPIRED
The context has already expired
.It GSS_S_NO_CONTEXT
The context_handle parameter did not identify a valid context
.It GSS_S_BAD_QOP
The specified QOP is not supported by the mechanism
.El
.Sh SEE ALSO
.Xr gss_wrap 3 ,
.Xr gss_release_buffer 3
.Sh STANDARDS
.Bl -tag
.It RFC 2743
Generic Security Service Application Program Interface Version 2, Update 1
.It RFC 2744
Generic Security Service API Version 2 : C-bindings
.El
.Sh HISTORY
The
.Nm
function first appeared in
.Fx 7.0 .
.Sh AUTHORS
John Wray, Iris Associates
.Sh COPYRIGHT
Copyright (C) The Internet Society (2000).  All Rights Reserved.
.Pp
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works.  However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
.Pp
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
.Pp
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.