GSS_GET_MIC(3) Programmer's Manual GSS_GET_MIC(3)NAME
gss_get_mic, gss_sign — Calculate a cryptographic message integrity code
(MIC) for a message; integrity service
gss_get_mic(OM_uint32 *minor_status, const gss_ctx_id_t context_handle,
gss_qop_t qop_req, const gss_buffer_t message_buffer,
gss_sign(OM_uint32 *minor_status, const gss_ctx_id_t context_handle,
gss_qop_t qop_req, gss_buffer_t message_buffer,
Generates a cryptographic MIC for the supplied message, and places the
MIC in a token for transfer to the peer application. The qop_req parame‐
ter allows a choice between several cryptographic algorithms, if sup‐
ported by the chosen mechanism.
Since some application-level protocols may wish to use tokens emitted by
gss_wrap() to provide "secure framing", implementations must support
derivation of MICs from zero-length messages.
The gss_sign() routine is an obsolete variant of 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.
minor_status Mechanism specific status code.
Identifies the context on which the message will be sent.
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 GSS_C_QOP_DEFAULT for
this parameter. If an unsupported protection strength is
requested, gss_get_mic() will return a major_status of
Message to be protected.
msg_token Buffer to receive token. The application must free storage
associated with this buffer after use with a call to
The context has already expired
The context_handle parameter did not identify a valid con‐
The specified QOP is not supported by the mechanism
SEE ALSOgss_wrap(3), gss_release_buffer(3)STANDARDS
RFC 2743 Generic Security Service Application Program Interface Ver‐
sion 2, Update 1
RFC 2744 Generic Security Service API Version 2 : C-bindings
The gss_get_mic function first appeared in FreeBSD 7.0.
John Wray, Iris Associates
Copyright (C) The Internet Society (2000). All Rights Reserved.
This document and translations of it may be copied and furnished to oth‐
ers, and derivative works that comment on or otherwise explain it or
assist in its implementation may be prepared, copied, published and dis‐
tributed, 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 ref‐
erences 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
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
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 FIT‐
NESS FOR A PARTICULAR PURPOSE.
BSD January 26, 2010 BSD