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/* $Id$
**
** The client program for the wallet system.
**
** Written by Russ Allbery <rra@stanford.edu>
** Copyright 2006, 2007, 2008
** Board of Trustees, Leland Stanford Jr. University
**
** See LICENSE for licensing terms.
*/
#include <config.h>
#include <system.h>
#include <errno.h>
#include <krb5.h>
#include <remctl.h>
#include <client/internal.h>
#include <util/util.h>
/* Basic wallet behavior options set either on the command line or via
krb5.conf. If set via krb5.conf, we allocate memory for the strings, but
we never free them. */
struct options {
char *type;
char *server;
char *principal;
int port;
};
/* Allow defaults to be set for a particular site with configure options if
people don't want to use krb5.conf for some reason. */
#ifndef WALLET_SERVER
# define WALLET_SERVER NULL
#endif
#ifndef WALLET_PORT
# define WALLET_PORT 0
#endif
/* Usage message. Use as a format and pass the port number. */
static const char usage_message[] = "\
Usage: wallet [options] <command> <type> <name> [<arg> ...]\n\
wallet [options] acl <command> <id> [<arg> ...]\n\
\n\
Options:\n\
-c <command> Command prefix to use (default: wallet)\n\
-f <output> For the get command, output file (default: stdout)\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 <srvtab> For the get keytab command, srvtab output file\n\
-s <server> Server hostname (default: " WALLET_SERVER ")\n\
-v Display the version of wallet\n";
/*
** Display the usage message for remctl.
*/
static void
usage(int status)
{
fprintf((status == 0) ? stdout : stderr, usage_message, WALLET_PORT);
exit(status);
}
/*
** Load a string option from Kerberos appdefaults. This requires an annoying
** workaround because one cannot specify a default value of NULL.
*/
static void
default_string(krb5_context ctx, const char *opt, const char *defval,
char **result)
{
if (defval == NULL)
defval = "";
krb5_appdefault_string(ctx, "wallet", NULL, opt, defval, result);
if (*result != NULL && (*result)[0] == '\0') {
free(*result);
*result = NULL;
}
}
/*
** Load a number option from Kerberos appdefaults. The native interface
** doesn't support numbers, so we actually read a string and then convert.
*/
static void
default_number(krb5_context ctx, const char *opt, int defval, int *result)
{
char *tmp;
krb5_appdefault_string(ctx, "wallet", NULL, opt, "", &tmp);
if (tmp != NULL && tmp[0] != '\0')
*result = atoi(tmp);
else
*result = defval;
if (tmp != NULL)
free(tmp);
}
/*
** Set option defaults and then get krb5.conf configuration, if any, and
** override the defaults. Later, command-line options will override those
** defaults.
*/
static void
set_defaults(krb5_context ctx, struct options *options)
{
default_string(ctx, "wallet_type", "wallet", &options->type);
default_string(ctx, "wallet_server", WALLET_SERVER, &options->server);
default_string(ctx, "wallet_principal", NULL, &options->principal);
default_number(ctx, "wallet_port", WALLET_PORT, &options->port);
}
/*
** 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, status;
const char **command;
const char *file = NULL;
const char *srvtab = NULL;
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");
set_defaults(ctx, &options);
while ((option = getopt(argc, argv, "c:f:k:hp:S:s:v")) != EOF) {
switch (option) {
case 'c':
options.type = optarg;
break;
case 'f':
file = 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':
srvtab = optarg;
break;
case 's':
options.server = optarg;
break;
case 'v':
printf("%s\n", PACKAGE_STRING);
exit(0);
break;
default:
usage(1);
break;
}
}
argc -= optind;
argv += optind;
if (argc < 3)
usage(1);
/* -f is only supported for get and -S with get keytab. */
if (file != NULL && strcmp(argv[0], "get") != 0)
die("-f only supported for get");
if (srvtab != NULL) {
if (strcmp(argv[0], "get") != 0 || strcmp(argv[1], "keytab") != 0)
die("-S only supported for get keytab");
if (file == NULL)
die("-S option requires -f also be used");
}
/* 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");
/* 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));
/* Most commands, we handle ourselves, but keytab get commands with -f are
special. */
if (strcmp(argv[0], "get") == 0 && strcmp(argv[1], "keytab") == 0) {
if (argc > 3)
die("too many arguments");
status = get_keytab(r, ctx, options.type, argv[2], file, srvtab);
} else {
command = xmalloc(sizeof(char *) * (argc + 2));
command[0] = options.type;
for (i = 0; i < argc; i++)
command[i + 1] = argv[i];
command[argc + 1] = NULL;
status = run_command(r, command, NULL, NULL);
}
remctl_close(r);
krb5_free_context(ctx);
exit(status);
}
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