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/*
* A specialized wallet client for rekeying a keytab.
*
* Written by Russ Allbery <rra@stanford.edu>
* and Jon Robertson <jonrober@stanford.edu>
* Copyright 2010
* The Board of Trustees of the Leland Stanford Junior University
*
* See LICENSE for licensing terms.
*/
#include <config.h>
#include <portable/krb5.h>
#include <portable/system.h>
#include <remctl.h>
#include <errno.h>
#include <client/internal.h>
#include <util/messages.h>
#include <util/messages-krb5.h>
/*
* Usage message. Use as a format and pass the port number and default server
* name.
*/
static const char usage_message[] = "\
Usage: wallet-rekey [options] [<file> ...]\n\
\n\
Options:\n\
-c <command> Command prefix to use (default: wallet)\n\
-k <principal> Kerberos principal of the server\n\
-h Display this help\n\
-p <port> Port of server (default: %d, if zero, remctl default)\n\
-s <server> Server hostname (default: %s)\n\
-u <user> Authenticate as <user> before rekeying\n\
-v Display the version of wallet\n";
/*
* Display the usage message for wallet-rekey.
*/
static void
usage(int status)
{
fprintf((status == 0) ? stdout : stderr, usage_message, WALLET_PORT,
(WALLET_SERVER == NULL) ? "<none>" : WALLET_SERVER);
exit(status);
}
/*
* Main routine. Parse the arguments and then perform the desired operation.
*/
int
main(int argc, char *argv[])
{
krb5_context ctx;
krb5_error_code retval;
struct options options;
int option, i;
bool okay = true;
struct remctl *r;
long tmp;
char *end;
/* Set up logging and identity. */
message_program_name = "wallet";
/* Initialize default configuration. */
retval = krb5_init_context(&ctx);
if (retval != 0)
die_krb5(ctx, retval, "cannot initialize Kerberos");
default_options(ctx, &options);
while ((option = getopt(argc, argv, "c:k:hp:S:s:u:v")) != EOF) {
switch (option) {
case 'c':
options.type = optarg;
break;
case 'k':
options.principal = optarg;
break;
case 'h':
usage(0);
break;
case 'p':
errno = 0;
tmp = strtol(optarg, &end, 10);
if (tmp <= 0 || tmp > 65535 || *end != '\0')
die("invalid port number %s", optarg);
options.port = tmp;
break;
case 's':
options.server = optarg;
break;
case 'u':
options.user = optarg;
break;
case 'v':
printf("%s\n", PACKAGE_STRING);
exit(0);
break;
default:
usage(1);
break;
}
}
argc -= optind;
argv += optind;
/*
* If no server was set at configure time and none was set on the command
* line or with krb5.conf settings, we can't continue.
*/
if (options.server == NULL)
die("no server specified in krb5.conf or with -s");
/* If a user was specified, obtain Kerberos tickets. */
if (options.user != NULL)
kinit(ctx, options.user);
/* Open a remctl connection. */
r = remctl_new();
if (r == NULL)
sysdie("cannot allocate memory");
if (!remctl_open(r, options.server, options.port, options.principal))
die("%s", remctl_error(r));
/*
* Rekey all the keytabs given on the command line, or the system keytab
* if none were given.
*/
if (argc == 0)
okay = rekey_keytab(r, ctx, options.type, "/etc/krb5.keytab");
else {
for (i = 0; i < argc; i++) {
okay = rekey_keytab(r, ctx, options.type, argv[i]);
if (!okay)
break;
}
}
remctl_close(r);
krb5_free_context(ctx);
if (options.user != NULL)
kdestroy();
exit(okay ? 0 : 1);
}
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