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/*
* Copyright (c) 2015 Cryptonector LLC.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name Cryptonector LLC may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <roken.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <gssapi.h>
#include <err.h>
#include <getarg.h>
static void
print_gss_err(OM_uint32 stat, int status_type, gss_OID mech)
{
gss_buffer_desc str;
OM_uint32 maj;
OM_uint32 min;
OM_uint32 msg_ctx = 0;
int first = 1;
do {
maj = gss_display_status(&min, stat, status_type, mech, &msg_ctx,
&str);
if (maj != GSS_S_COMPLETE) {
fprintf(stderr, "Error displaying GSS %s error (%lu): %lu, %lu",
status_type == GSS_C_GSS_CODE ? "major" : "minor",
(unsigned long)stat, (unsigned long)maj,
(unsigned long)min);
return;
}
if (first) {
fprintf(stderr, "GSS %s error: %.*s\n",
status_type == GSS_C_GSS_CODE ? "major" : "minor",
(int)str.length, (char *)str.value);
first = 0;
} else {
fprintf(stderr, "\t%.*s\n", (int)str.length, (char *)str.value);
}
gss_release_buffer(&min, &str);
} while (msg_ctx != 0);
}
static void
print_gss_errs(OM_uint32 major, OM_uint32 minor, gss_OID mech)
{
print_gss_err(major, GSS_C_GSS_CODE, GSS_C_NO_OID);
print_gss_err(major, GSS_C_MECH_CODE, mech);
}
static void
gss_err(int exitval, OM_uint32 major, OM_uint32 minor, gss_OID mech,
const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vwarnx(fmt, args);
va_end(args);
print_gss_errs(major, minor, mech);
exit(exitval);
}
static int version_flag = 0;
static int help_flag = 0;
static struct getargs args[] = {
{"version", 0, arg_flag, &version_flag, "print version", NULL },
{"help", 0, arg_flag, &help_flag, NULL, NULL }
};
static void
usage(int ret)
{
arg_printusage(args, sizeof(args)/sizeof(*args),
NULL, "from_ccache to_ccache");
exit(ret);
}
int
main(int argc, char **argv)
{
OM_uint32 major, minor;
gss_cred_id_t from_cred = GSS_C_NO_CREDENTIAL;
gss_cred_id_t to_cred = GSS_C_NO_CREDENTIAL;
gss_cred_id_t cred = GSS_C_NO_CREDENTIAL;
char *from_env;
char *to_env;
int optidx = 0;
setprogname(argv[0]);
if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
usage(1);
if (help_flag)
usage (0);
if (version_flag){
print_version(NULL);
exit(0);
}
argc -= optidx;
argv += optidx;
if (argc < 2)
errx(1, "required arguments missing");
if (argc > 2)
errx(1, "too many arguments");
if (asprintf(&from_env, "KRB5CCNAME=%s", argv[0]) == -1 || from_env == NULL)
err(1, "out of memory");
if (asprintf(&to_env, "KRB5CCNAME=%s", argv[1]) == -1 || to_env == NULL)
err(1, "out of memory");
putenv(from_env);
major = gss_add_cred(&minor, GSS_C_NO_CREDENTIAL, GSS_C_NO_NAME,
GSS_KRB5_MECHANISM, GSS_C_INITIATE, GSS_C_INDEFINITE,
GSS_C_INDEFINITE, &from_cred, NULL, NULL, NULL);
if (major != GSS_S_COMPLETE)
gss_err(1, major, minor, GSS_KRB5_MECHANISM,
"failed to acquire creds from %s", argv[0]);
putenv(to_env);
major = gss_store_cred(&minor, from_cred, GSS_C_INITIATE,
GSS_KRB5_MECHANISM, 1, 1, NULL, NULL);
if (major != GSS_S_COMPLETE)
gss_err(1, major, minor, GSS_KRB5_MECHANISM,
"failed to store creds into %s", argv[1]);
(void) gss_release_cred(&minor, &from_cred);
(void) gss_release_cred(&minor, &to_cred);
major = gss_add_cred(&minor, GSS_C_NO_CREDENTIAL, GSS_C_NO_NAME,
GSS_KRB5_MECHANISM, GSS_C_INITIATE, GSS_C_INDEFINITE,
GSS_C_INDEFINITE, &cred, NULL, NULL, NULL);
if (major != GSS_S_COMPLETE)
gss_err(1, major, minor, GSS_KRB5_MECHANISM,
"failed to acquire creds from %s", argv[1]);
(void) gss_release_cred(&minor, &cred);
putenv("KRB5CCNAME");
free(from_env);
free(to_env);
return 0;
}
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