Manual Pages  — GSS_DISPLAY_STATUS

gss_display_status – Convert a GSS-API status code to text

SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES SEE ALSO STANDARDS HISTORY AUTHORS COPYRIGHT

#include <gssapi/gssapi.h>

OM_uint32
gss_display_status(OM_uint32 *minor_status, OM_uint32 status_value, int status_type, const gss_OID mech_type, OM_uint32 *message_context, gss_buffer_t status_string);

Allows an application to obtain a textual representation of a GSS-API status code, for display to the user or for logging purposes. Since some status values may indicate multiple conditions, applications may need to call gss_display_status() multiple times, each call generating a single text string. The message_context parameter is used by gss_display_status() to store state information about which error messages have already been extracted from a given status_value; message_context must be initialized to zero by the application prior to the first call, and gss_display_status() will return a non-zero value in this parameter if there are further messages to extract.

The message_context parameter contains all state information required by gss_display_status() in order to extract further messages from the status_value; even when a non-zero value is returned in this parameter, the application is not required to call gss_display_status() again unless subsequent messages are desired. The following code extracts all messages from a given status code and prints them to stderr:

OM_uint32 message_context;
OM_uint32 status_code;
OM_uint32 maj_status;
OM_uint32 min_status;
gss_buffer_desc status_string;

       ...

message_context = 0;

do {

  maj_status = gss_display_status (
                  &min_status,
                  status_code,
                  GSS_C_GSS_CODE,
                  GSS_C_NO_OID,
                  &message_context,
                  &status_string)

  fprintf(stderr,
          "%.*s ,
         (int)status_string.length,
         (char *)status_string.value);

  gss_release_buffer(&min_status, &status_string);

} while (message_context != 0);

minor_status
	Mechanism specific status code.
status_value
	Status value to be converted
status_type

GSS_C_GSS_CODE	status_value is a GSS status code
GSS_C_MECH_CODE
	status_value is a mechanism status code

mech_type	Underlying mechanism (used to interpret a minor status value). Supply GSS_C_NO_OID to obtain the system default.
message_context
	Should be initialized to zero by the application prior to the first call. On return from gss_display_status(), a non-zero status_value parameter indicates that additional messages may be extracted from the status code via subsequent calls to gss_display_status(), passing the same status_value, status_type, mech_type, and message_context parameters.
status_string	Textual interpretation of the status_value. Storage associated with this parameter must be freed by the application after use with a call to gss_release_buffer().

GSS_S_COMPLETE	Successful completion
GSS_S_BAD_MECH	Indicates that translation in accordance with an unsupported mechanism type was requested
GSS_S_BAD_STATUS
	The status value was not recognized, or the status type was neither GSS_C_GSS_CODE nor GSS_C_MECH_CODE.

RFC 2743
	Generic Security Service Application Program Interface Version 2, Update 1
RFC 2744
	Generic Security Service API Version 2 : C-bindings

The gss_display_status function first appeared in FreeBSD 7.0 .

John Wray, Iris Associates

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