xref: /illumos-gate/usr/src/lib/gss_mechs/mech_krb5/krb5/krb/appdefault.c (revision 55fea89d)

/*
 * appdefault - routines designed to be called from applications to
 *		 handle the [appdefaults] profile section
 */

#include <stdio.h>
#include <string.h>
#include "k5-int.h"



 /*xxx Duplicating this is annoying; try to work on a better way.*/
static const char *const conf_yes[] = {
	"y", "yes", "true", "t", "1", "on",
	0,
};

static const char *const conf_no[] = {
	"n", "no", "false", "nil", "0", "off",
	0,
};

static int conf_boolean(char *s)
{
	const char * const *p;
	for(p=conf_yes; *p; p++) {
		if (!strcasecmp(*p,s))
			return 1;
	}
	for(p=conf_no; *p; p++) {
		if (!strcasecmp(*p,s))
		return 0;
	}
	/* Default to "no" */
	return 0;
}

static krb5_error_code appdefault_get(krb5_context context, const char *appname, const krb5_data *realm, const char *option, char **ret_value)
{
        profile_t profile;
        const char *names[5];
	char **nameval = NULL;
	krb5_error_code retval;
	const char * realmstr =  realm?realm->data:NULL;

	    if (!context || (context->magic != KV5M_CONTEXT))
	    return KV5M_CONTEXT;

	    profile = context->profile;

	/*
	 * Try number one:
	 *
	 * [appdefaults]
	 *	app = {
	 *		SOME.REALM = {
	 *			option = <boolean>
	 *		}
	 *	}
	 */

	names[0] = "appdefaults";
	names[1] = appname;

	if (realmstr) {
		names[2] = realmstr;
		names[3] = option;
		names[4] = 0;
		retval = profile_get_values(profile, names, &nameval);
		if (retval == 0 && nameval && nameval[0]) {
			*ret_value = strdup(nameval[0]);
			goto goodbye;
		}
	}

	/*
	 * Try number two:
	 *
	 * [appdefaults]
	 *	app = {
	 *		option = <boolean>
	 *      }
	 */

	names[2] = option;
	names[3] = 0;
	retval = profile_get_values(profile, names, &nameval);
	if (retval == 0 && nameval && nameval[0]) {
		*ret_value = strdup(nameval[0]);
		goto goodbye;
	}

	/*
	 * Try number three:
	 *
	 * [appdefaults]
	 *	realm = {
	 *		option = <boolean>
	 */

	if (realmstr) {
		names[1] = realmstr;
		names[2] = option;
		names[3] = 0;
		retval = profile_get_values(profile, names, &nameval);
		if (retval == 0 && nameval && nameval[0]) {
			*ret_value = strdup(nameval[0]);
			goto goodbye;
		}
	}

	/*
	 * Try number four:
	 *
	 * [appdefaults]
	 *	option = <boolean>
	 */

	names[1] = option;
	names[2] = 0;
	retval = profile_get_values(profile, names, &nameval);
	if (retval == 0 && nameval && nameval[0]) {
		*ret_value = strdup(nameval[0]);
	} else {
		return retval;
	}

goodbye:
	if (nameval) {
		char **cpp;
		for (cpp = nameval; *cpp; cpp++)
			free(*cpp);
		free(nameval);
	}
	return 0;
}

void KRB5_CALLCONV
krb5_appdefault_boolean(krb5_context context, const char *appname, const krb5_data *realm, const char *option, int default_value, int *ret_value)
{
	char *string = NULL;
	krb5_error_code retval;

	retval = appdefault_get(context, appname, realm, option, &string);

	if (! retval && string) {
		*ret_value = conf_boolean(string);
		free(string);
	} else
		*ret_value = default_value;
}

void KRB5_CALLCONV
krb5_appdefault_string(krb5_context context, const char *appname, const krb5_data *realm, const char *option, const char *default_value, char **ret_value)
{
	krb5_error_code retval;
	char *string;

	retval = appdefault_get(context, appname, realm, option, &string);

	if (! retval && string) {
		*ret_value = string;
	} else {
		*ret_value = strdup(default_value);
	}
}