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/* -*- mode: c; indent-tabs-mode: nil -*- */
/* tests/gssapi/t_ccselect.c - Test program for GSSAPI cred selection */
/*
* Copyright 2011 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gssapi/gssapi_krb5.h>
/*
* Test program for client credential selection, intended to be run from a
* Python test script. Performs a one-token
* gss_init_sec_context/gss_accept_sec_context exchange, optionally with a
* specified principal as the initiator name, a specified principal name as
* target name, the default acceptor cred. If the exchange is successful,
* prints the initiator name as seen by the acceptor. If any call is
* unsuccessful, displays an error message. Exits with status 0 if all
* operations are successful, or 1 if not.
*
* Usage: ./t_ccselect [targetprinc|gss:service@host] [initiatorprinc|-]
*/
static void
display_status_1(const char *m, OM_uint32 code, int type)
{
OM_uint32 maj_stat, min_stat;
gss_buffer_desc msg;
OM_uint32 msg_ctx;
msg_ctx = 0;
while (1) {
maj_stat = gss_display_status(&min_stat, code,
type, GSS_C_NULL_OID,
&msg_ctx, &msg);
fprintf(stderr, "%s: %s\n", m, (char *)msg.value);
(void) gss_release_buffer(&min_stat, &msg);
if (!msg_ctx)
break;
}
}
static void
gsserr(const char *msg, OM_uint32 maj_stat, OM_uint32 min_stat)
{
display_status_1(msg, maj_stat, GSS_C_GSS_CODE);
display_status_1(msg, min_stat, GSS_C_MECH_CODE);
exit(1);
}
int
main(int argc, char *argv[])
{
OM_uint32 minor, major;
gss_cred_id_t initiator_cred = GSS_C_NO_CREDENTIAL;
gss_buffer_desc buf;
gss_name_t target_name, initiator_name = GSS_C_NO_NAME;
gss_name_t real_initiator_name;
gss_buffer_desc token, tmp, namebuf;
gss_ctx_id_t initiator_context = GSS_C_NO_CONTEXT;
gss_ctx_id_t acceptor_context = GSS_C_NO_CONTEXT;
if (argc < 2 || argc > 3) {
fprintf(stderr, "Usage: %s targetprinc [initiatorprinc|-]\n", argv[0]);
return 1;
}
/* Import the target name. */
if (strncmp(argv[1], "gss:", 4) == 0) {
/* Import as host-based service. */
buf.value = argv[1] + 4;
buf.length = strlen((char *)buf.value);
major = gss_import_name(&minor, &buf,
(gss_OID)GSS_C_NT_HOSTBASED_SERVICE,
&target_name);
} else {
/* Import as krb5 principal name. */
buf.value = argv[1];
buf.length = strlen((char *)buf.value);
major = gss_import_name(&minor, &buf,
(gss_OID)GSS_KRB5_NT_PRINCIPAL_NAME,
&target_name);
}
if (GSS_ERROR(major))
gsserr("gss_import_name(target_name)", major, minor);
/* Import the initiator name as a krb5 principal and get creds, maybe. */
if (argc >= 3) {
if (strcmp(argv[2], "-") != 0) {
buf.value = argv[2];
buf.length = strlen((char *)buf.value);
major = gss_import_name(&minor, &buf,
(gss_OID)GSS_KRB5_NT_PRINCIPAL_NAME,
&initiator_name);
if (GSS_ERROR(major))
gsserr("gss_import_name(initiator_name)", major, minor);
}
/* Get acceptor cred. */
major = gss_acquire_cred(&minor, initiator_name, GSS_C_INDEFINITE,
GSS_C_NO_OID_SET, GSS_C_INITIATE,
&initiator_cred, NULL, NULL);
if (GSS_ERROR(major))
gsserr("gss_acquire_cred", major, minor);
}
/* Create krb5 initiator context and get the first token. */
token.value = NULL;
token.length = 0;
major = gss_init_sec_context(&minor, initiator_cred, &initiator_context,
target_name, (gss_OID)gss_mech_krb5,
GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
GSS_C_INDEFINITE, GSS_C_NO_CHANNEL_BINDINGS,
GSS_C_NO_BUFFER, NULL, &token, NULL, NULL);
if (GSS_ERROR(major))
gsserr("gss_init_sec_context", major, minor);
/* Pass the token to gss_accept_sec_context. */
tmp.value = NULL;
tmp.length = 0;
major = gss_accept_sec_context(&minor, &acceptor_context,
GSS_C_NO_CREDENTIAL, &token,
GSS_C_NO_CHANNEL_BINDINGS,
&real_initiator_name, NULL, &tmp,
NULL, NULL, NULL);
if (major != GSS_S_COMPLETE)
gsserr("gss_accept_sec_context", major, minor);
namebuf.value = NULL;
namebuf.length = 0;
major = gss_display_name(&minor, real_initiator_name, &namebuf, NULL);
if (GSS_ERROR(major))
gsserr("gss_display_name(initiator)", major, minor);
printf("%.*s\n", (int)namebuf.length, (char *)namebuf.value);
(void)gss_release_name(&minor, &target_name);
(void)gss_release_name(&minor, &initiator_name);
(void)gss_release_name(&minor, &real_initiator_name);
(void)gss_release_cred(&minor, &initiator_cred);
(void)gss_delete_sec_context(&minor, &initiator_context, NULL);
(void)gss_delete_sec_context(&minor, &acceptor_context, NULL);
(void)gss_release_buffer(&minor, &token);
(void)gss_release_buffer(&minor, &tmp);
(void)gss_release_buffer(&minor, &namebuf);
return 0;
}
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