/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


/*
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 *
 *	Openvision retains the copyright to derivative works of
 *	this source code.  Do *NOT* create a derivative of this
 *	source code before consulting with your legal department.
 *	Do *NOT* integrate *ANY* of this source code into another
 *	product before consulting with your legal department.
 *
 *	For further information, read the top-level Openvision
 *	copyright which is contained in the top-level MIT Kerberos
 *	copyright.
 *
 * WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
 *
 */


/*
 * lib/kadm/alt_prof.c
 *
 * Copyright 1995,2001 by the Massachusetts Institute of Technology.
 * All Rights Reserved.
 *
 * Export of this software from the United States of America may
 *   require a specific license from the United States Government.
 *   It is the responsibility of any person or organization contemplating
 *   export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  Furthermore if you modify this software you must label
 * your software as modified software and not distribute it in such a
 * fashion that it might be confused with the original M.I.T. software.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 *
 */

/*
 * alt_prof.c - Implement alternate profile file handling.
 */
#include "k5-int.h"
#include <kadm5/admin.h>
#include "adm_proto.h"
#include <stdio.h>
#include <ctype.h>
#include <os-proto.h>
#include <kdb/kdb_log.h>

krb5_error_code kadm5_free_config_params();

#define	DEFAULT_ENCTYPE_LIST \
	"aes256-cts-hmac-sha1-96:normal " \
	"aes128-cts-hmac-sha1-96:normal " \
	"des3-cbc-hmac-sha1-kd:normal " \
	"arcfour-hmac-md5:normal " \
	"arcfour-hmac-md5-exp:normal " \
	"des-cbc-md5:normal " \
	"des-cbc-crc:normal"

static krb5_key_salt_tuple *copy_key_salt_tuple(ksalt, len)
krb5_key_salt_tuple *ksalt;
krb5_int32 len;
{
    krb5_key_salt_tuple *knew;

    if((knew = (krb5_key_salt_tuple *)
		malloc((len ) * sizeof(krb5_key_salt_tuple)))) {
         memcpy(knew, ksalt, len * sizeof(krb5_key_salt_tuple));
	 return knew;
    }
    return 0;
}

/*
 * krb5_aprof_init()	- Initialize alternate profile context.
 *
 * Parameters:
 *	fname		- default file name of the profile.
 *	envname		- environment variable name which can override fname.
 *	acontextp	- Pointer to opaque context for alternate profile.
 *
 * Returns:
 *	error codes from profile_init()
 */
krb5_error_code
krb5_aprof_init(fname, envname, acontextp)
    char		*fname;
    char		*envname;
    krb5_pointer	*acontextp;
{
    krb5_error_code	kret;
    profile_t		profile;
    const char *kdc_config;
    size_t krb5_config_len, kdc_config_len;
    char *profile_path;
    char **filenames;
    int i;

    kret = krb5_get_default_config_files (&filenames);
    if (kret)
	return kret;
    krb5_config_len = 0;
    for (i = 0; filenames[i] != NULL; i++)
	krb5_config_len += strlen(filenames[i]) + 1;
    if (i > 0)
	krb5_config_len--;
    if (envname == NULL
	|| (kdc_config = getenv(envname)) == NULL)
	kdc_config = fname;
    if (kdc_config == NULL)
	kdc_config_len = 0;
    else
	kdc_config_len = strlen(kdc_config);
    profile_path = malloc(2 + krb5_config_len + kdc_config_len);
    if (profile_path == NULL) {
	krb5_free_config_files(filenames);
	return errno;
    }
    if (kdc_config_len)
	strcpy(profile_path, kdc_config);
    else
	profile_path[0] = 0;
    if (krb5_config_len)
	for (i = 0; filenames[i] != NULL; i++) {
	    if (kdc_config_len || i)
		strcat(profile_path, ":");
	    strcat(profile_path, filenames[i]);
	}
    krb5_free_config_files(filenames);
    profile = (profile_t) NULL;
    kret = profile_init_path(profile_path, &profile);
    free(profile_path);
    if (kret)
	return kret;
    *acontextp = profile;
    return 0;
}

/*
 * krb5_aprof_getvals()	- Get values from alternate profile.
 *
 * Parameters:
 *	acontext	- opaque context for alternate profile.
 *	hierarchy	- hierarchy of value to retrieve.
 *	retdata		- Returned data values.
 *
 * Returns:
 * 	error codes from profile_get_values()
 */
krb5_error_code
krb5_aprof_getvals(acontext, hierarchy, retdata)
    krb5_pointer	acontext;
    const char		**hierarchy;
    char		***retdata;
{
    return(profile_get_values((profile_t) acontext,
			      hierarchy,
			      retdata));
}

/*
 * krb5_aprof_get_boolean()
 *
 * Parameters:
 *	acontext	- opaque context for alternate profile
 *	hierarchy	- hierarchy of value to retrieve
 *	retdata		- Returned data value
 * Returns:
 *	error codes
 */

static krb5_error_code
string_to_boolean (const char *string, krb5_boolean *out)
{
    static const char *const yes[] = { "y", "yes", "true", "t", "1", "on" };
    static const char *const no[] = { "n", "no", "false", "f", "nil", "0", "off" };
    int i;

    for (i = 0; i < sizeof(yes)/sizeof(yes[0]); i++)
	if (!strcasecmp(string, yes[i])) {
	    *out = 1;
	    return 0;
	}
    for (i = 0; i < sizeof(no)/sizeof(no[0]); i++)
	if (!strcasecmp(string, no[i])) {
	    *out = 0;
	    return 0;
	}
    return PROF_BAD_BOOLEAN;
}

krb5_error_code
krb5_aprof_get_boolean(krb5_pointer acontext, const char **hierarchy,
		       int uselast, krb5_boolean *retdata)
{
    krb5_error_code kret;
    char **values;
    char *valp;
    int idx;
    krb5_boolean val;

    kret = krb5_aprof_getvals (acontext, hierarchy, &values);
    if (kret)
	return kret;
    idx = 0;
    if (uselast) {
	while (values[idx])
	    idx++;
	idx--;
    }
    valp = values[idx];
    kret = string_to_boolean (valp, &val);
    if (kret)
	return kret;
    *retdata = val;
    return 0;
}

/*
 * krb5_aprof_get_deltat()	- Get a delta time value from the alternate
 *				  profile.
 *
 * Parameters:
 *	acontext		- opaque context for alternate profile.
 *	hierarchy		- hierarchy of value to retrieve.
 *	uselast			- if true, use last value, otherwise use
 *				  first value found.
 *	deltatp			- returned delta time value.
 *
 * Returns:
 * 	error codes from profile_get_values()
 *	error codes from krb5_string_to_deltat()
 */
krb5_error_code
krb5_aprof_get_deltat(acontext, hierarchy, uselast, deltatp)
    krb5_pointer	acontext;
    const char		**hierarchy;
    krb5_boolean	uselast;
    krb5_deltat		*deltatp;
{
    krb5_error_code	kret;
    char		**values;
    char		*valp;
    int			idx;

    if (!(kret = krb5_aprof_getvals(acontext, hierarchy, &values))) {
	idx = 0;
	if (uselast) {
	    for (idx=0; values[idx]; idx++);
	    idx--;
	}
	valp = values[idx];
	kret = krb5_string_to_deltat(valp, deltatp);

	/* Free the string storage */
	for (idx=0; values[idx]; idx++)
	    krb5_xfree(values[idx]);
	krb5_xfree(values);
    }
    return(kret);
}

/*
 * krb5_aprof_get_string()	- Get a string value from the alternate
 *				  profile.
 *
 * Parameters:
 *	acontext		- opaque context for alternate profile.
 *	hierarchy		- hierarchy of value to retrieve.
 *	uselast			- if true, use last value, otherwise use
 *				  first value found.
 *	stringp			- returned string value.
 *
 * Returns:
 * 	error codes from profile_get_values()
 */
krb5_error_code
krb5_aprof_get_string(acontext, hierarchy, uselast, stringp)
    krb5_pointer	acontext;
    const char		**hierarchy;
    krb5_boolean	uselast;
    char		**stringp;
{
    krb5_error_code	kret;
    char		**values;
    int			idx, i;

    if (!(kret = krb5_aprof_getvals(acontext, hierarchy, &values))) {
	idx = 0;
	if (uselast) {
	    for (idx=0; values[idx]; idx++);
	    idx--;
	}

	*stringp = values[idx];

	/* Free the string storage */
	for (i=0; values[i]; i++)
	    if (i != idx)
		krb5_xfree(values[i]);
	krb5_xfree(values);
    }
    return(kret);
}

/*
 * krb5_aprof_get_int32()	- Get a 32-bit integer value from the alternate
 *				  profile.
 *
 * Parameters:
 *	acontext		- opaque context for alternate profile.
 *	hierarchy		- hierarchy of value to retrieve.
 *	uselast			- if true, use last value, otherwise use
 *				  first value found.
 *	intp			- returned 32-bit integer value.
 *
 * Returns:
 * 	error codes from profile_get_values()
 *	EINVAL			- value is not an integer
 */
krb5_error_code
krb5_aprof_get_int32(acontext, hierarchy, uselast, intp)
    krb5_pointer	acontext;
    const char		**hierarchy;
    krb5_boolean	uselast;
    krb5_int32		*intp;
{
    krb5_error_code	kret;
    char		**values;
    int			idx;

    if (!(kret = krb5_aprof_getvals(acontext, hierarchy, &values))) {
	idx = 0;
	if (uselast) {
	    for (idx=0; values[idx]; idx++);
	    idx--;
	}

	if (sscanf(values[idx], "%d", intp) != 1)
	    kret = EINVAL;

	/* Free the string storage */
	for (idx=0; values[idx]; idx++)
	    krb5_xfree(values[idx]);
	krb5_xfree(values);
    }
    return(kret);
}

/*
 * krb5_aprof_finish()	- Finish alternate profile context.
 *
 * Parameter:
 *	acontext	- opaque context for alternate profile.
 *
 * Returns:
 *	0 on success, something else on failure.
 */
krb5_error_code
krb5_aprof_finish(acontext)
    krb5_pointer	acontext;
{
    profile_release(acontext);
    return(0);
}

/*
 * Function: kadm5_get_config_params
 *
 * Purpose: Merge configuration parameters provided by the caller with
 * values specified in configuration files and with default values.
 *
 * Arguments:
 *
 *	context		(r) krb5_context to use
 *	profile		(r) profile file to use
 *	envname		(r) envname that contains a profile name to
 *			override profile
 *	params_in	(r) params structure containing user-supplied
 *			values, or NULL
 *	params_out	(w) params structure to be filled in
 *
 * Effects:
 *
 * The fields and mask of params_out are filled in with values
 * obtained from params_in, the specified profile, and default
 * values.  Only and all fields specified in params_out->mask are
 * set.  The context of params_out must be freed with
 * kadm5_free_config_params.
 *
 * params_in and params_out may be the same pointer.  However, all pointers
 * in params_in for which the mask is set will be re-assigned to newly copied
 * versions, overwriting the old pointer value.
 */
krb5_error_code kadm5_get_config_params(context, use_kdc_config,
					params_in, params_out)
   krb5_context		context;
   int			use_kdc_config;
   kadm5_config_params	*params_in, *params_out;
{
    char		*filename;
    char		*envname;
    char		*lrealm;
    krb5_pointer	aprofile = 0;
    const char		*hierarchy[4];
    char		*svalue;
    krb5_int32		ivalue;
    kadm5_config_params params, empty_params;

    krb5_error_code	kret = 0;
    krb5_error_code dnsret = 1;

#ifdef KRB5_DNS_LOOKUP
	char dns_host[MAX_DNS_NAMELEN];
	unsigned short dns_portno;
	krb5_data dns_realm;
	memset((char *)&dns_realm, 0, sizeof (dns_realm));
#endif /* KRB5_DNS_LOOKUP */

    memset((char *) &params, 0, sizeof(params));
    memset((char *) &empty_params, 0, sizeof(empty_params));

    if (params_in == NULL) params_in = &empty_params;

    if (params_in->mask & KADM5_CONFIG_REALM) {
	 lrealm = params.realm = strdup(params_in->realm);
	 if (params.realm)
	      params.mask |= KADM5_CONFIG_REALM;
    } else {
	 kret = krb5_get_default_realm(context, &lrealm);
	 if (kret)
	      goto cleanup;
	 params.realm = lrealm;
	 params.mask |= KADM5_CONFIG_REALM;
    }
    /*
     * XXX These defaults should to work on both client and
     * server.  kadm5_get_config_params can be implemented as a
     * wrapper function in each library that provides correct
     * defaults for NULL values.
     */
    if (use_kdc_config) {
	filename = DEFAULT_KDC_PROFILE;
	envname = KDC_PROFILE_ENV;
    } else {
	filename = DEFAULT_PROFILE_PATH;
	envname = "KRB5_CONFIG";
    }
    if (context->profile_secure == TRUE) envname = 0;

    kret = krb5_aprof_init(filename, envname, &aprofile);
    if (kret)
	    goto cleanup;

    /* Initialize realm parameters */
    hierarchy[0] = "realms";
    hierarchy[1] = lrealm;
    hierarchy[3] = (char *) NULL;

#ifdef KRB5_DNS_LOOKUP
	/*
	 * Initialize realm info for (possible) DNS lookups.
	 */
	dns_realm.data = strdup(lrealm);
	dns_realm.length = strlen(lrealm);
	dns_realm.magic = 0;
#endif /* KRB5_DNS_LOOKUP */

    /* Get the value for the admin server */
    hierarchy[2] = "admin_server";
    if (params_in->mask & KADM5_CONFIG_ADMIN_SERVER) {
	 params.admin_server = strdup(params_in->admin_server);
	 if (params.admin_server)
	      params.mask |= KADM5_CONFIG_ADMIN_SERVER;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.admin_server = svalue;
	 params.mask |= KADM5_CONFIG_ADMIN_SERVER;
    }
#ifdef KRB5_DNS_LOOKUP
	else if (strcmp(envname, "KRB5_CONFIG") == 0) {
		/*
		 * Solaris Kerberos: only do DNS lookup for admin_server if this
		 * is a krb5.conf type of config file.  Note, the filename may
		 * not be /etc/krb5/krb5.conf so we assume that the KRB5_CONFIG
		 * envname string will consistently indicate the type of config
		 * file.
		 */
		dnsret = krb5_get_servername(context, &dns_realm,
					"_kerberos-adm", "_udp",
					dns_host, &dns_portno);
		if (dnsret == 0) {
			params.admin_server = strdup(dns_host);
			if (params.admin_server)
				params.mask |= KADM5_CONFIG_ADMIN_SERVER;
			params.kadmind_port = dns_portno;
			params.mask |= KADM5_CONFIG_KADMIND_PORT;
		}
	}
#endif /* KRB5_DNS_LOOKUP */

    if ((params.mask & KADM5_CONFIG_ADMIN_SERVER) && dnsret) {
	 char *p;
	 p = strchr(params.admin_server, ':');
	 if (p) {
	      params.kadmind_port = atoi(p+1);
	      params.mask |= KADM5_CONFIG_KADMIND_PORT;
	      *p = '\0';
	 }
    }

    /* Get the value for the database */
    hierarchy[2] = "database_name";
    if (params_in->mask & KADM5_CONFIG_DBNAME) {
	 params.dbname = strdup(params_in->dbname);
	 if (params.dbname)
	      params.mask |= KADM5_CONFIG_DBNAME;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.dbname = svalue;
	 params.mask |= KADM5_CONFIG_DBNAME;
    } else {
	 params.dbname = strdup(DEFAULT_KDB_FILE);
	 if (params.dbname)
	      params.mask |= KADM5_CONFIG_DBNAME;
    }

    /*
     * admin database name and lockfile are now always derived from dbname
     */
    if (params.mask & KADM5_CONFIG_DBNAME) {
	 params.admin_dbname = (char *) malloc(strlen(params.dbname) + 7);
	 if (params.admin_dbname) {
	      sprintf(params.admin_dbname, "%s.kadm5", params.dbname);
	      params.mask |= KADM5_CONFIG_ADBNAME;
	 }
    }

    if (params.mask & KADM5_CONFIG_ADBNAME) {
	 params.admin_lockfile = (char *) malloc(strlen(params.admin_dbname)
						 + 6);
	 if (params.admin_lockfile) {
	      sprintf(params.admin_lockfile, "%s.lock", params.admin_dbname);
	      params.mask |= KADM5_CONFIG_ADB_LOCKFILE;
	 }
    }

    /* Get the value for the admin (policy) database lock file*/
    hierarchy[2] = "admin_keytab";
    if (params_in->mask & KADM5_CONFIG_ADMIN_KEYTAB) {
	 params.admin_keytab = strdup(params_in->admin_keytab);
	 if (params.admin_keytab)
	      params.mask |= KADM5_CONFIG_ADMIN_KEYTAB;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.mask |= KADM5_CONFIG_ADMIN_KEYTAB;
	 params.admin_keytab = svalue;
    } else if ((params.admin_keytab = (char *) getenv("KRB5_KTNAME"))) {
	 params.admin_keytab = strdup(params.admin_keytab);
	 if (params.admin_keytab)
	      params.mask |= KADM5_CONFIG_ADMIN_KEYTAB;
    } else {
	 params.admin_keytab = strdup(DEFAULT_KADM5_KEYTAB);
	 if (params.admin_keytab)
	      params.mask |= KADM5_CONFIG_ADMIN_KEYTAB;
    }

    /* Get the name of the acl file */
    hierarchy[2] = "acl_file";
    if (params_in->mask & KADM5_CONFIG_ACL_FILE) {
	 params.acl_file = strdup(params_in->acl_file);
	 if (params.acl_file)
	      params.mask |= KADM5_CONFIG_ACL_FILE;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.mask |= KADM5_CONFIG_ACL_FILE;
	 params.acl_file = svalue;
    } else {
	 params.acl_file = strdup(DEFAULT_KADM5_ACL_FILE);
	 if (params.acl_file)
	      params.mask |= KADM5_CONFIG_ACL_FILE;
    }

    /* Get the name of the dict file */
    hierarchy[2] = "dict_file";
    if (params_in->mask & KADM5_CONFIG_DICT_FILE) {
	 params.dict_file = strdup(params_in->dict_file);
	 if (params.dict_file)
	      params.mask |= KADM5_CONFIG_DICT_FILE;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.mask |= KADM5_CONFIG_DICT_FILE;
	 params.dict_file = svalue;
    }

    /* Get the value for the kadmind port */
    if (! (params.mask & KADM5_CONFIG_KADMIND_PORT)) {
	 hierarchy[2] = "kadmind_port";
	 if (params_in->mask & KADM5_CONFIG_KADMIND_PORT) {
	      params.mask |= KADM5_CONFIG_KADMIND_PORT;
	      params.kadmind_port = params_in->kadmind_port;
	 } else if (aprofile &&
		    !krb5_aprof_get_int32(aprofile, hierarchy, TRUE,
					  &ivalue)) {
	      params.kadmind_port = ivalue;
	      params.mask |= KADM5_CONFIG_KADMIND_PORT;
	 } else {
	      params.kadmind_port = DEFAULT_KADM5_PORT;
	      params.mask |= KADM5_CONFIG_KADMIND_PORT;
	 }
    }

    /* Get the value for the kpasswd port */
    if (! (params.mask & KADM5_CONFIG_KPASSWD_PORT)) {
	hierarchy[2] = "kpasswd_port";
	if (params_in->mask & KADM5_CONFIG_KPASSWD_PORT) {
	    params.mask |= KADM5_CONFIG_KPASSWD_PORT;
	    params.kpasswd_port = params_in->kpasswd_port;
	} else if (aprofile &&
		   !krb5_aprof_get_int32(aprofile, hierarchy, TRUE,
					 &ivalue)) {
	    params.kpasswd_port = ivalue;
	    params.mask |= KADM5_CONFIG_KPASSWD_PORT;
	} else {
	    params.kpasswd_port = DEFAULT_KPASSWD_PORT;
	    params.mask |= KADM5_CONFIG_KPASSWD_PORT;
	}
    }

    /* Get the value for the master key name */
	 hierarchy[2] = "master_key_name";
    if (params_in->mask & KADM5_CONFIG_MKEY_NAME) {
	 params.mkey_name = strdup(params_in->mkey_name);
	 if (params.mkey_name)
	      params.mask |= KADM5_CONFIG_MKEY_NAME;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.mask |= KADM5_CONFIG_MKEY_NAME;
	 params.mkey_name = svalue;
    }

    /* Get the value for the master key type */
    hierarchy[2] = "master_key_type";
    if (params_in->mask & KADM5_CONFIG_ENCTYPE) {
	 params.mask |= KADM5_CONFIG_ENCTYPE;
	 params.enctype = params_in->enctype;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 if (!krb5_string_to_enctype(svalue, &params.enctype)) {
	      params.mask |= KADM5_CONFIG_ENCTYPE;
	      krb5_xfree(svalue);
	 }
    } else {
	 params.mask |= KADM5_CONFIG_ENCTYPE;
	 params.enctype = DEFAULT_KDC_ENCTYPE;
    }

    /* Get the value for mkey_from_kbd */
    if (params_in->mask & KADM5_CONFIG_MKEY_FROM_KBD) {
	 params.mask |= KADM5_CONFIG_MKEY_FROM_KBD;
	 params.mkey_from_kbd = params_in->mkey_from_kbd;
    }

    /* Get the value for the stashfile */
    hierarchy[2] = "key_stash_file";
    if (params_in->mask & KADM5_CONFIG_STASH_FILE) {
	 params.stash_file = strdup(params_in->stash_file);
	 if (params.stash_file)
	      params.mask |= KADM5_CONFIG_STASH_FILE;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 params.mask |= KADM5_CONFIG_STASH_FILE;
	 params.stash_file = svalue;
    }

	/*
	 * Solaris Kerberos
	 * Get the value for maximum ticket lifetime.
	 * See SEAM documentation or the Bug ID 4184504
	 * We have changed the logic so that the entries are
	 * created in the database with the maximum duration
	 * for life and renew life KRB5_INT32_MAX
	 * However this wil get negotiated down when
	 * as or tgs request is processed by KDC.
	 */
    hierarchy[2] = "max_life";
    if (params_in->mask & KADM5_CONFIG_MAX_LIFE) {
	 params.mask |= KADM5_CONFIG_MAX_LIFE;
	 params.max_life = params_in->max_life;
    } else {
	 params.max_life = KRB5_INT32_MAX;
	 params.mask |= KADM5_CONFIG_MAX_LIFE;
    }

    /* Get the value for maximum renewable ticket lifetime. */
    hierarchy[2] = "max_renewable_life";
    if (params_in->mask & KADM5_CONFIG_MAX_RLIFE) {
	 params.mask |= KADM5_CONFIG_MAX_RLIFE;
	 params.max_rlife = params_in->max_rlife;
    } else {
	 params.max_rlife =  KRB5_INT32_MAX;
	 params.mask |= KADM5_CONFIG_MAX_RLIFE;
    }

    /* Get the value for the default principal expiration */
    hierarchy[2] = "default_principal_expiration";
    if (params_in->mask & KADM5_CONFIG_EXPIRATION) {
	 params.mask |= KADM5_CONFIG_EXPIRATION;
	 params.expiration = params_in->expiration;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 if (!krb5_string_to_timestamp(svalue, &params.expiration)) {
	      params.mask |= KADM5_CONFIG_EXPIRATION;
	      krb5_xfree(svalue);
	 }
    } else {
	 params.mask |= KADM5_CONFIG_EXPIRATION;
	 params.expiration = 0;
    }

    /* Get the value for the default principal flags */
    hierarchy[2] = "default_principal_flags";
    if (params_in->mask & KADM5_CONFIG_FLAGS) {
	 params.mask |= KADM5_CONFIG_FLAGS;
	 params.flags = params_in->flags;
    } else if (aprofile &&
	       !krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	 char *sp, *ep, *tp;

	 sp = svalue;
	 params.flags = 0;
	 while (sp) {
	      if ((ep = strchr(sp, (int) ',')) ||
		  (ep = strchr(sp, (int) ' ')) ||
		  (ep = strchr(sp, (int) '\t'))) {
		   /* Fill in trailing whitespace of sp */
		   tp = ep - 1;
		   while (isspace((int) *tp) && (tp > sp)) {
			*tp = '\0';
			tp--;
		   }
		   *ep = '\0';
		   ep++;
		   /* Skip over trailing whitespace of ep */
		   while (isspace((int) *ep) && (*ep)) ep++;
	      }
	      /* Convert this flag */
	      if (krb5_string_to_flags(sp,
				       "+",
				       "-",
				       &params.flags))
		   break;
	      sp = ep;
	 }
	 if (!sp)
	      params.mask |= KADM5_CONFIG_FLAGS;
	 krb5_xfree(svalue);
    } else {
	 params.mask |= KADM5_CONFIG_FLAGS;
	 params.flags = KRB5_KDB_DEF_FLAGS;
    }

    /* Get the value for the supported enctype/salttype matrix */
    hierarchy[2] = "supported_enctypes";
    if (params_in->mask & KADM5_CONFIG_ENCTYPES) {
		params.mask |= KADM5_CONFIG_ENCTYPES;
		if (params_in->num_keysalts > 0) {
		    params.keysalts = malloc(params_in->num_keysalts *
			    sizeof (*params.keysalts));
		    if (params.keysalts == NULL) {
			kret = ENOMEM;
			goto cleanup;
		    }
		    (void) memcpy(params.keysalts, params_in->keysalts,
			    (params_in->num_keysalts *
			    sizeof (*params.keysalts)));
		 params.num_keysalts = params_in->num_keysalts;
	 }
    } else {
	 svalue = NULL;
	 if (aprofile)
	      krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue);
	 if (svalue == NULL)
	     svalue = strdup(DEFAULT_ENCTYPE_LIST);

	 params.keysalts = NULL;
	 params.num_keysalts = 0;
	 krb5_string_to_keysalts(svalue,
				 ", \t",/* Tuple separators	*/
				 ":.-",	/* Key/salt separators	*/
				 0,	/* No duplicates	*/
				 &params.keysalts,
				 &params.num_keysalts);
	 if (params.num_keysalts)
	      params.mask |= KADM5_CONFIG_ENCTYPES;

	 if (svalue)
	      krb5_xfree(svalue);
    }

	hierarchy[2] = "kpasswd_server";
	if (params_in->mask & KADM5_CONFIG_KPASSWD_SERVER) {
		params.mask |= KADM5_CONFIG_KPASSWD_SERVER;
		params.kpasswd_server = strdup(params_in->kpasswd_server);
	} else {
		svalue = NULL;

		if (aprofile)
			krb5_aprof_get_string(aprofile, hierarchy,
					    TRUE, &svalue);
		if (svalue == NULL) {
#ifdef KRB5_DNS_LOOKUP
			if (strcmp(envname, "KRB5_CONFIG") == 0) {
				/*
				 * Solaris Kerberos: only do DNS lookup for
				 * kpasswd_server if this is a krb5.conf type of
				 * config file.  Note, the filename may not be
				 * /etc/krb5/krb5.conf so we assume that the
				 * KRB5_CONFIG envname string will consistently
				 * indicate the type of config file.
				 */
				dnsret = krb5_get_servername(context,
				    &dns_realm, "_kpasswd", "_udp",
				    dns_host, &dns_portno);

				if (dnsret == 0) {
					params.kpasswd_server =
					    strdup(dns_host);
					if (params.kpasswd_server) {
						params.mask |=
						    KADM5_CONFIG_KPASSWD_SERVER;
					}
					params.kpasswd_port = dns_portno;
					params.mask |=
					    KADM5_CONFIG_KPASSWD_PORT;
				}
			}
#endif /* KRB5_DNS_LOOKUP */

			/*
			 * If a unique 'kpasswd_server' is not specified,
			 * use the normal 'admin_server'.
			 */
			if ((params.mask & KADM5_CONFIG_ADMIN_SERVER) &&
				    dnsret) {
				params.kpasswd_server =
					strdup(params.admin_server);
				params.mask |= KADM5_CONFIG_KPASSWD_SERVER;
			}
		} else {
			char *p;
			params.kpasswd_server = svalue;
			params.mask |= KADM5_CONFIG_KPASSWD_SERVER;

			if ((p = strchr(params.kpasswd_server, ':'))) {
				params.kpasswd_port = atoi(p+1);
				params.mask |= KADM5_CONFIG_KPASSWD_PORT;
				*p = '\0';
			}
		}
	}

	hierarchy[2] = "kpasswd_protocol";

	/* default to current RPCSEC_GSS protocol */
	params.kpasswd_protocol = KRB5_CHGPWD_RPCSEC;
	params.mask |= KADM5_CONFIG_KPASSWD_PROTOCOL;

	if (params_in->mask & KADM5_CONFIG_KPASSWD_PROTOCOL) {
		params.mask |= KADM5_CONFIG_KPASSWD_PROTOCOL;
		params.kpasswd_protocol = params_in->kpasswd_protocol;
	} else {
		svalue = NULL;

		if (aprofile)
			krb5_aprof_get_string(aprofile, hierarchy,
					    TRUE, &svalue);
		if (svalue != NULL) {
			if (strcasecmp(svalue, "RPCSEC_GSS") == 0) {
				params.kpasswd_protocol = KRB5_CHGPWD_RPCSEC;
				params.mask |= KADM5_CONFIG_KPASSWD_PROTOCOL;
			} else if (strcasecmp(svalue, "SET_CHANGE") == 0) {
				params.kpasswd_protocol =
					KRB5_CHGPWD_CHANGEPW_V2;
				params.mask |= KADM5_CONFIG_KPASSWD_PROTOCOL;
			}
		}
		if (svalue)
			krb5_xfree(svalue);
	}

	/*
	 * If the kpasswd_port is not yet defined, define it now.
	 */
	if (! (params.mask & KADM5_CONFIG_KPASSWD_PORT)) {
		if (params_in->mask & KADM5_CONFIG_KPASSWD_PORT)
			params.kpasswd_port = params_in->kpasswd_port;
		/*
		 * If kpasswd_port is not explicitly defined,
		 * determine the port to use based on the protocol.
		 * The alternative protocol uses a different port
		 * than the standard admind port.
		 */
		else if (params.kpasswd_protocol == KRB5_CHGPWD_RPCSEC) {
			params.kpasswd_port = DEFAULT_KADM5_PORT;
		} else {
			/*
			 * When using the Horowitz/IETF protocol for
			 * password changing, the default port is 464
			 * (officially recognized by IANA).
			 */
			params.kpasswd_port = DEFAULT_KPASSWD_PORT;
		}
		params.mask |= KADM5_CONFIG_KPASSWD_PORT;
	}

	hierarchy[2] = "sunw_dbprop_enable";

	params.iprop_enabled = FALSE;
	params.mask |= KADM5_CONFIG_IPROP_ENABLED;

	if (params_in->mask & KADM5_CONFIG_IPROP_ENABLED) {
		params.mask |= KADM5_CONFIG_IPROP_ENABLED;
		params.iprop_enabled = params_in->iprop_enabled;
	} else {
		if (aprofile && !krb5_aprof_get_string(aprofile, hierarchy,
		    TRUE, &svalue)) {
			if (strncasecmp(svalue, "Y", 1) == 0)
				params.iprop_enabled = TRUE;
			if (strncasecmp(svalue, "true", 4) == 0)
				params.iprop_enabled = TRUE;
			params.mask |= KADM5_CONFIG_IPROP_ENABLED;
			krb5_xfree(svalue);
		}
	}

	hierarchy[2] = "sunw_dbprop_master_ulogsize";

	params.iprop_ulogsize = DEF_ULOGENTRIES;
	params.mask |= KADM5_CONFIG_ULOG_SIZE;

	if (params_in->mask & KADM5_CONFIG_ULOG_SIZE) {
		params.mask |= KADM5_CONFIG_ULOG_SIZE;
		params.iprop_ulogsize = params_in->iprop_ulogsize;
	} else {
		if (aprofile && !krb5_aprof_get_int32(aprofile, hierarchy,
		    TRUE, &ivalue)) {
			if (ivalue > MAX_ULOGENTRIES)
				params.iprop_ulogsize = MAX_ULOGENTRIES;
			else if (ivalue <= 0)
				params.iprop_ulogsize = DEF_ULOGENTRIES;
			else
				params.iprop_ulogsize = ivalue;
			params.mask |= KADM5_CONFIG_ULOG_SIZE;
		}
	}

	hierarchy[2] = "sunw_dbprop_slave_poll";

	params.iprop_polltime = strdup("2m");
	if (params.iprop_polltime)
		params.mask |= KADM5_CONFIG_POLL_TIME;

	if (params_in->mask & KADM5_CONFIG_POLL_TIME) {
		if (params.iprop_polltime)
			free(params.iprop_polltime);
		params.iprop_polltime = strdup(params_in->iprop_polltime);
		if (params.iprop_polltime)
			params.mask |= KADM5_CONFIG_POLL_TIME;
	} else {
		if (aprofile && !krb5_aprof_get_string(aprofile, hierarchy,
		    TRUE, &svalue)) {
			if (params.iprop_polltime)
				free(params.iprop_polltime);
			params.iprop_polltime = strdup(svalue);
			params.mask |= KADM5_CONFIG_POLL_TIME;
			krb5_xfree(svalue);
		}
	}

	*params_out = params;

cleanup:
    if (aprofile)
	krb5_aprof_finish(aprofile);
    if (kret) {
	 kadm5_free_config_params(context, &params);
	 params_out->mask = 0;
    }
#ifdef KRB5_DNS_LOOKUP
	if (dns_realm.data)
		free(dns_realm.data);
#endif /* KRB5_DNS_LOOKUP */

    return(kret);
}
/*
 * kadm5_free_config_params()	- Free data allocated by above.
 */
/*ARGSUSED*/
krb5_error_code
kadm5_free_config_params(context, params)
    krb5_context	context;
    kadm5_config_params	*params;
{
    if (params) {
	if (params->dbname) {
		krb5_xfree(params->dbname);
		params->dbname = NULL;
	}
	if (params->mkey_name) {
		krb5_xfree(params->mkey_name);
		params->mkey_name = NULL;
	}
	if (params->stash_file) {
		krb5_xfree(params->stash_file);
		params->stash_file = NULL;
	}
	if (params->keysalts) {
		krb5_xfree(params->keysalts);
		params->keysalts = NULL;
		params->num_keysalts = 0;
	}
	if (params->admin_keytab) {
		free(params->admin_keytab);
		params->admin_keytab = NULL;
	}
	if (params->dict_file) {
		free(params->dict_file);
		params->dict_file = NULL;
	}
	if (params->acl_file) {
		free(params->acl_file);
		params->acl_file = NULL;
	}
	if (params->realm) {
		free(params->realm);
		params->realm = NULL;
	}
	if (params->admin_dbname) {
		free(params->admin_dbname);
		params->admin_dbname = NULL;
	}
	if (params->admin_lockfile) {
		free(params->admin_lockfile);
		params->admin_lockfile = NULL;
	}
	if (params->admin_server) {
		free(params->admin_server);
		params->admin_server = NULL;
	}
	if (params->kpasswd_server) {
		free(params->kpasswd_server);
		params->kpasswd_server = NULL;
	}
	if (params->iprop_polltime) {
		free(params->iprop_polltime);
		params->iprop_polltime = NULL;
	}
	}
	return (0);
}

krb5_error_code
kadm5_get_admin_service_name(krb5_context ctx,
			     char *realm_in,
			     char *admin_name,
			     size_t maxlen)
{
    krb5_error_code ret;
    kadm5_config_params params_in, params_out;
    struct hostent *hp;

    memset(&params_in, 0, sizeof(params_in));
    memset(&params_out, 0, sizeof(params_out));

    params_in.mask |= KADM5_CONFIG_REALM;
    params_in.realm = realm_in;
    ret = kadm5_get_config_params(ctx, 0, &params_in, &params_out);
    if (ret)
	return ret;

    if (!(params_out.mask & KADM5_CONFIG_ADMIN_SERVER)) {
	ret = KADM5_MISSING_KRB5_CONF_PARAMS;
	goto err_params;
    }

    hp = gethostbyname(params_out.admin_server);
    if (hp == NULL) {
	ret = errno;
	goto err_params;
    }
    if (strlen(hp->h_name) + sizeof("kadmin/") > maxlen) {
	ret = ENOMEM;
	goto err_params;
    }
    sprintf(admin_name, "kadmin/%s", hp->h_name);

err_params:
    kadm5_free_config_params(ctx, &params_out);
    return ret;
}

/***********************************************************************
 * This is the old krb5_realm_read_params, which I mutated into
 * kadm5_get_config_params but which old code (kdb5_* and krb5kdc)
 * still uses.
 ***********************************************************************/

/*
 * krb5_read_realm_params()	- Read per-realm parameters from KDC
 *				  alternate profile.
 */
krb5_error_code
krb5_read_realm_params(kcontext, realm, rparamp)
    krb5_context	kcontext;
    char		*realm;
    krb5_realm_params	**rparamp;
{
    char		*filename;
    char		*envname;
    char		*lrealm;
    krb5_pointer	aprofile = 0;
    krb5_realm_params	*rparams;
    const char		*hierarchy[4];
    char		*svalue;
    krb5_int32		ivalue;
    krb5_boolean	bvalue;
    krb5_deltat		dtvalue;

    char		*kdcprofile = 0;
    char		*kdcenv = 0;

    krb5_error_code	kret;

    filename = (kdcprofile) ? kdcprofile : DEFAULT_KDC_PROFILE;
    envname = (kdcenv) ? kdcenv : KDC_PROFILE_ENV;

    if (kcontext->profile_secure == TRUE) envname = 0;

    rparams = (krb5_realm_params *) NULL;
    if (realm)
	lrealm = strdup(realm);
    else {
	kret = krb5_get_default_realm(kcontext, &lrealm);
	if (kret)
	    goto cleanup;
    }

    kret = krb5_aprof_init(filename, envname, &aprofile);
    if (kret)
	goto cleanup;

    rparams = (krb5_realm_params *) malloc(sizeof(krb5_realm_params));
    if (rparams == 0) {
	kret = ENOMEM;
	goto cleanup;
    }

    /* Initialize realm parameters */
    memset((char *) rparams, 0, sizeof(krb5_realm_params));

    /* Get the value for the database */
    hierarchy[0] = "realms";
    hierarchy[1] = lrealm;
    hierarchy[2] = "database_name";
    hierarchy[3] = (char *) NULL;
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_dbname = svalue;

    /* Get the value for the KDC port list */
    hierarchy[2] = "kdc_ports";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_kdc_ports = svalue;
    hierarchy[2] = "kdc_tcp_ports";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_kdc_tcp_ports = svalue;

    /* Get the name of the acl file */
    hierarchy[2] = "acl_file";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_acl_file = svalue;

    /* Get the value for the kadmind port */
    hierarchy[2] = "kadmind_port";
    if (!krb5_aprof_get_int32(aprofile, hierarchy, TRUE, &ivalue)) {
	rparams->realm_kadmind_port = ivalue;
	rparams->realm_kadmind_port_valid = 1;
    }

    /* Get the value for the master key name */
    hierarchy[2] = "master_key_name";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_mkey_name = svalue;

    /* Get the value for the master key type */
    hierarchy[2] = "master_key_type";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	if (!krb5_string_to_enctype(svalue, &rparams->realm_enctype))
	    rparams->realm_enctype_valid = 1;
	krb5_xfree(svalue);
    }

    /* Get the value for the stashfile */
    hierarchy[2] = "key_stash_file";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue))
	rparams->realm_stash_file = svalue;

    /* Get the value for maximum ticket lifetime. */
    hierarchy[2] = "max_life";
    if (!krb5_aprof_get_deltat(aprofile, hierarchy, TRUE, &dtvalue)) {
	rparams->realm_max_life = dtvalue;
	rparams->realm_max_life_valid = 1;
    }

    /* Get the value for maximum renewable ticket lifetime. */
    hierarchy[2] = "max_renewable_life";
    if (!krb5_aprof_get_deltat(aprofile, hierarchy, TRUE, &dtvalue)) {
	rparams->realm_max_rlife = dtvalue;
	rparams->realm_max_rlife_valid = 1;
    }

    /* Get the value for the default principal expiration */
    hierarchy[2] = "default_principal_expiration";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	if (!krb5_string_to_timestamp(svalue,
				      &rparams->realm_expiration))
	    rparams->realm_expiration_valid = 1;
	krb5_xfree(svalue);
    }

    hierarchy[2] = "reject_bad_transit";
    if (!krb5_aprof_get_boolean(aprofile, hierarchy, TRUE, &bvalue)) {
	rparams->realm_reject_bad_transit = bvalue;
	rparams->realm_reject_bad_transit_valid = 1;
    }

    /* Get the value for the default principal flags */
    hierarchy[2] = "default_principal_flags";
    if (!krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue)) {
	char *sp, *ep, *tp;

	sp = svalue;
	rparams->realm_flags = 0;
	while (sp) {
	    if ((ep = strchr(sp, (int) ',')) ||
		(ep = strchr(sp, (int) ' ')) ||
		(ep = strchr(sp, (int) '\t'))) {
		/* Fill in trailing whitespace of sp */
		tp = ep - 1;
		while (isspace((int) *tp) && (tp < sp)) {
		    *tp = '\0';
		    tp--;
		}
		*ep = '\0';
		ep++;
		/* Skip over trailing whitespace of ep */
		while (isspace((int) *ep) && (*ep)) ep++;
	    }
	    /* Convert this flag */
	    if (krb5_string_to_flags(sp,
				     "+",
				     "-",
				     &rparams->realm_flags))
		break;
	    sp = ep;
	}
	if (!sp)
	    rparams->realm_flags_valid = 1;
	krb5_xfree(svalue);
    }

	/* Get the value for the supported enctype/salttype matrix */
	/*
	 * SUNWresync121
	 * Solaris kerberos: updated this code to support default values for
	 * the supported_enctypes.
	 */
	hierarchy[2] = "supported_enctypes";
	svalue = NULL;
	krb5_aprof_get_string(aprofile, hierarchy, TRUE, &svalue);

	/*
	 * Set the default value if supported_enctypes was not explicitly
	 * set in the kdc.conf.
	 */
	if (svalue == NULL) {
	    svalue = strdup(DEFAULT_ENCTYPE_LIST);
	}
	if (svalue != NULL) {
	    krb5_string_to_keysalts(svalue,
				    ", \t",	/* Tuple separators	*/
				    ":.-",	/* Key/salt separators	*/
				    0,	/* No duplicates	*/
				    &rparams->realm_keysalts,
				    &rparams->realm_num_keysalts);
	    krb5_xfree(svalue);
	    svalue = NULL;
	}
cleanup:
    if (aprofile)
	krb5_aprof_finish(aprofile);
    if (lrealm)
	free(lrealm);
    if (kret) {
	if (rparams)
	    krb5_free_realm_params(kcontext, rparams);
	rparams = 0;
    }
    *rparamp = rparams;
    return(kret);
}

/*
 * krb5_free_realm_params()	- Free data allocated by above.
 */
krb5_error_code
krb5_free_realm_params(kcontext, rparams)
    krb5_context	kcontext;
    krb5_realm_params	*rparams;
{
    if (rparams) {
	if (rparams->realm_profile)
	    krb5_xfree(rparams->realm_profile);
	if (rparams->realm_dbname)
	    krb5_xfree(rparams->realm_dbname);
	if (rparams->realm_mkey_name)
	    krb5_xfree(rparams->realm_mkey_name);
	if (rparams->realm_stash_file)
	    krb5_xfree(rparams->realm_stash_file);
	if (rparams->realm_keysalts)
	    krb5_xfree(rparams->realm_keysalts);
	if (rparams->realm_kdc_ports)
	    krb5_xfree(rparams->realm_kdc_ports);
	if (rparams->realm_kdc_tcp_ports)
	    krb5_xfree(rparams->realm_kdc_tcp_ports);
	if (rparams->realm_acl_file)
	    krb5_xfree(rparams->realm_acl_file);
	krb5_xfree(rparams);
    }
    return(0);
}