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gss_get_mic(3) gss gss_get_mic(3)


gss_get_mic - API function


#include <gss.h>

OM_uint32 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_buffer_t message_token);


(Integer, modify) Mechanism specific status code.
(gss_ctx_id_t, read) Identifies the context on
which the message will be sent.
(gss_qop_t, read, optional) 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
(buffer, opaque, read) Message to be protected.
(buffer, opaque, modify) Buffer to receive token. The
application must free storage associated with this buffer after
use with a call to gss_release_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 parameter allows a choice between several cryptographic algorithms, if supported 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.


`GSS_S_COMPLETE`: Successful completion.

`GSS_S_CONTEXT_EXPIRED`: The context has already expired.

`GSS_S_NO_CONTEXT`: The context_handle parameter did not identify a valid context.

`GSS_S_BAD_QOP`: The specified QOP is not supported by the mechanism.


Report bugs to <>. GNU Generic Security Service home page: General help using GNU software:


Copyright © 2003-2022 Simon Josefsson.
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.


The full documentation for gss is maintained as a Texinfo manual. If the info and gss programs are properly installed at your site, the command

info gss

should give you access to the complete manual.

1.0.4 gss