gss_verify_mic(3GSS)				  Generic Security Services API Library Functions			      gss_verify_mic(3GSS)

NAME

       gss_verify_mic - verify integrity of a received message

SYNOPSIS

       cc [ flag... ] file... -lgss  [ library... ]
       #include <gssapi/gssapi.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);

DESCRIPTION

       The gss_verify_mic() function 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(3GSS) to provide secure framing, the GSS-API supports the
       calculation and verification of MICs over zero-length messages.

PARAMETERS

       The parameter descriptions for gss_verify_mic() follow:

       minor_status	 The status code returned by the underlying mechanism.

       context_handle	 Identifies the context on which the message arrived.

       message_buffer	 The message to be verified.

       token_buffer	 The token associated with the message.

       qop_state	 Specifies the quality of protection gained from the MIC. Specify NULL if this parameter is not required.

ERRORS

       gss_verify_mic() may return the following status codes:

       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 it 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 it has been verified out of sequence; an ear-
				lier 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.

       GSS_S_FAILURE		The  underlying  mechanism detected an error for which no specific GSS status code is defined.	The mechanism-spe-
				cific status code reported by means of the minor_status parameter details the error condition.

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgss (32-bit)		   |
       +-----------------------------+-----------------------------+
       |			     |SUNWgssx (64-bit) 	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gss_wrap(3GSS), attributes(5)

       Solaris Security for Developers Guide

SunOS 5.11							    15 Jan 2003 					      gss_verify_mic(3GSS)