gss_verify_mic(3)							gss							 gss_verify_mic(3)

NAME

       gss_verify_mic - API function

SYNOPSIS

       #include <gss.h>

       OM_uint32 gss_verify_mic(OM_uint32 * minor_status, const gss_ctx_id_t context_handle, const gss_buffer_t message_buffer, const gss_buffer_t
       token_buffer, gss_qop_t * qop_state);

ARGUMENTS

       OM_uint32 * minor_status
		   (Integer, modify) Mechanism specific status code.

       const gss_ctx_id_t context_handle
		   (gss_ctx_id_t, read) Identifies the context on
		     which the message arrived.

       const gss_buffer_t message_buffer
		   (buffer, opaque, read) Message to be verified.

       const gss_buffer_t token_buffer
		   (buffer, opaque, read) Token associated with
		     message.

       gss_qop_t * qop_state
		   (gss_qop_t, modify, optional) Quality of protection
		     gained from MIC Specify NULL if not required.

DESCRIPTION

       Verifies that a cryptographic MIC, contained in the token parameter, fits the supplied message.	The qop_state parameter allows	a  message
       recipient to determine the strength of protection that was applied to the message.

       Since  some application-level protocols may wish to use tokens emitted by gss_wrap() to provide "secure framing", implementations must sup-
       port the calculation and verification of MICs over zero-length messages.

RETURN VALUE

       `GSS_S_COMPLETE`: Successful completion.

       `GSS_S_DEFECTIVE_TOKEN`: The token failed consistency checks.

       `GSS_S_BAD_SIG`: The MIC was incorrect.

       `GSS_S_DUPLICATE_TOKEN`: The token was valid, and contained a correct MIC for the message, but it had already been processed.

       `GSS_S_OLD_TOKEN`: The token was valid, and contained a correct MIC for the message, but it is too old to check for duplication.

       `GSS_S_UNSEQ_TOKEN`: The token was valid, and contained a correct MIC for the message, but has been verified out of sequence; a later token
       has already been received.

       `GSS_S_GAP_TOKEN`:  The	token  was  valid,  and contained a correct MIC for the message, but has been verified out of sequence; an earlier
       expected token has not yet been received.

       `GSS_S_CONTEXT_EXPIRED`: The context has already expired.

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

REPORTING BUGS

       Report bugs to <bug-gss@gnu.org>.  GNU Generic Security Service home page: http://www.gnu.org/software/gss/ General help  using	GNU  soft-
       ware: http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2003-2011 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.

SEE ALSO

       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.

gss								       1.0.2							 gss_verify_mic(3)