1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2005 Doug Rabson 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD$ 28.\" 29.\" Copyright (C) The Internet Society (2000). All Rights Reserved. 30.\" 31.\" This document and translations of it may be copied and furnished to 32.\" others, and derivative works that comment on or otherwise explain it 33.\" or assist in its implementation may be prepared, copied, published 34.\" and distributed, in whole or in part, without restriction of any 35.\" kind, provided that the above copyright notice and this paragraph are 36.\" included on all such copies and derivative works. However, this 37.\" document itself may not be modified in any way, such as by removing 38.\" the copyright notice or references to the Internet Society or other 39.\" Internet organizations, except as needed for the purpose of 40.\" developing Internet standards in which case the procedures for 41.\" copyrights defined in the Internet Standards process must be 42.\" followed, or as required to translate it into languages other than 43.\" English. 44.\" 45.\" The limited permissions granted above are perpetual and will not be 46.\" revoked by the Internet Society or its successors or assigns. 47.\" 48.\" This document and the information contained herein is provided on an 49.\" "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING 50.\" TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING 51.\" BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION 52.\" HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF 53.\" MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 54.\" 55.\" The following commands are required for all man pages. 56.Dd November 12, 2005 57.Os 58.Dt GSS_VERIFY_MIC 3 PRM 59.Sh NAME 60.Nm gss_verify_mic , 61.Nm gss_verify 62.Nd Check a MIC against a message; verify integrity of a received message 63.\" This next command is for sections 2 and 3 only. 64.\" .Sh LIBRARY 65.Sh SYNOPSIS 66.In "gssapi/gssapi.h" 67.Ft OM_uint32 68.Fo gss_verify_mic 69.Fa "OM_uint32 *minor_status" 70.Fa "const gss_ctx_id_t context_handle" 71.Fa "const gss_buffer_t message_buffer" 72.Fa "const gss_buffer_t token_buffer" 73.Fa "gss_qop_t *qop_state" 74.Fc 75.Ft OM_uint32 76.Fo gss_verify 77.Fa "OM_uint32 *minor_status" 78.Fa "gss_ctx_id_t context_handle" 79.Fa "gss_buffer_t message_buffer" 80.Fa "gss_buffer_t token_buffer" 81.Fa "gss_qop_t *qop_state" 82.Fc 83.Sh DESCRIPTION 84Verifies that a cryptographic MIC, 85contained in the token parameter, 86fits the supplied message. 87The 88.Fa qop_state 89parameter allows a message recipient to determine the strength of 90protection that was applied to the message. 91.Pp 92Since some application-level protocols may wish to use tokens emitted 93by 94.Fn gss_wrap 95to provide "secure framing", 96implementations must support the calculation and verification of MICs 97over zero-length messages. 98.Pp 99The 100.Fn gss_verify 101routine is an obsolete variant of 102.Fn gss_verify_mic . 103It is provided for backwards 104compatibility with applications using the GSS-API V1 interface. 105A distinct entrypoint (as opposed to #define) is provided, 106both to allow GSS-API V1 applications to link 107and to retain the slight parameter type differences between the 108obsolete versions of this routine and its current form. 109.Sh PARAMETERS 110.Bl -tag 111.It minor_status 112Mechanism specific status code. 113.It context_handle 114Identifies the context on which the message arrived. 115.It message_buffer 116Message to be verified. 117.It token_buffer 118Token associated with message. 119.It qop_state 120Quality of protection gained from MIC. 121Specify 122.Dv NULL 123if not required. 124.El 125.Sh RETURN VALUES 126.Bl -tag 127.It GSS_S_COMPLETE 128Successful completion 129.It GSS_S_DEFECTIVE_TOKEN 130The token failed consistency checks 131.It GSS_S_BAD_SIG 132The MIC was incorrect 133.It GSS_S_DUPLICATE_TOKEN 134The token was valid, 135and contained a correct MIC for the message, 136but it had already been processed 137.It GSS_S_OLD_TOKEN 138The token was valid, 139and contained a correct MIC for the message, 140but it is too old to check for duplication 141.It GSS_S_UNSEQ_TOKEN 142The token was valid, 143and contained a correct MIC for the message, 144but has been verified out of sequence; 145a later token has already been received. 146.It GSS_S_GAP_TOKEN 147The token was valid, 148and contained a correct MIC for the message, 149but has been verified out of sequence; 150an earlier expected token has not yet been received 151.It GSS_S_CONTEXT_EXPIRED 152The context has already expired 153.It GSS_S_NO_CONTEXT 154The context_handle parameter did not identify a valid context 155.El 156.Sh SEE ALSO 157.Xr gss_wrap 3 158.Sh STANDARDS 159.Bl -tag 160.It RFC 2743 161Generic Security Service Application Program Interface Version 2, Update 1 162.It RFC 2744 163Generic Security Service API Version 2 : C-bindings 164.\" .Sh HISTORY 165.El 166.Sh HISTORY 167The 168.Nm 169manual page example first appeared in 170.Fx 7.0 . 171.Sh AUTHORS 172John Wray, Iris Associates 173