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/*
* Set default options for wallet clients.
*
* This file provides the functions to set default options from the krb5.conf
* file for both wallet and wallet-rekey.
*
* Written by Russ Allbery <eagle@eyrie.org>
* Copyright 2018 Russ Allbery <eagle@eyrie.org>
* Copyright 2006-2008, 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 <client/internal.h>
/*
* 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 = NULL;
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.
*/
void
default_options(krb5_context ctx, struct options *options)
{
int port;
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, &port);
if (port <= 0 || port > 65535)
options->port = WALLET_PORT;
else
options->port = (unsigned short) port;
options->user = NULL;
}
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