krb5/kadm5/alt_prof.c

	alt_prof.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * 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 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.  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 " \
    "des-cbc-md5:normal " \
    "des-cbc-crc:normal"

/*
 * 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;
    const char      *namelist[2];
    profile_t       profile;

    namelist[1] = (char *)NULL;
    profile = (profile_t)NULL;
    if (envname) {
        if ((namelist[0] = getenv(envname))) {
            kret = profile_init(namelist, &profile);
            if (kret)
                return (kret);
            *acontextp = (krb5_pointer) profile;
            return (0);
        }
    }
    profile = (profile_t)NULL;
    if (fname) {
        kret = profile_init_path(fname, &profile);
        if (kret == ENOENT) {
            profile = 0;
        } else if (kret)
            return (kret);
        *acontextp = (krb5_pointer) profile;
        return (0);
    }
    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_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         index;

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

        /* Free the string storage */
        for (index = 0; values[index]; index++)
            krb5_xfree(values[index]);
        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         index, i;

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

        *stringp = values[index];

        /* Free the string storage */
        for (i = 0; values[i]; i++)
            if (i != index)
                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         index;

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

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

        /* Free the string storage */
        for (index = 0; values[index]; index++)
            krb5_xfree(values[index]);
        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, kdcprofile, kdcenv,
                    params_in, params_out)
krb5_context        context;
char            *kdcprofile;
char            *kdcenv;
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;
#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;
    }
    if (params_in->mask & KADM5_CONFIG_PROFILE) {
        filename = params.profile = strdup(params_in->profile);
        if (params.profile)
            params.mask |= KADM5_CONFIG_PROFILE;
        envname = NULL;
    } else {
        /*
         * 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.
         */
        filename = (kdcprofile) ? kdcprofile : DEFAULT_KDC_PROFILE;
        envname = (kdcenv) ? kdcenv : KDC_PROFILE_ENV;
        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;
        if (p = strchr(params.admin_server, ':')) {
            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 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;
    }

    /*
     * 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.mask |= KADM5_CONFIG_MAX_LIFE;
        params.max_life = KRB5_INT32_MAX;
    }

    /* 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.mask |= KADM5_CONFIG_MAX_RLIFE;
        params.max_rlife =  KRB5_INT32_MAX;
    }

    /* 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(*tp) && (tp < sp)) {
                    *tp = '\0';
                    tp--;
                }
                *ep = '\0';
                ep++;
                /* Skip over trailing whitespace of ep */
                while (isspace(*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 = "2m";
    params.mask |= KADM5_CONFIG_POLL_TIME;

    if (params_in->mask & KADM5_CONFIG_POLL_TIME) {
        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)) {
            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) {
        (void) 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->profile) {
            krb5_xfree(params->profile);
            params->profile = NULL;
        }
        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;
        }
    }
    return (0);
}

/*
 * 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, kdcprofile, kdcenv, rparamp)
krb5_context    kcontext;
char        *realm;
char        *kdcprofile;
char        *kdcenv;
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_deltat     dtvalue;

    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);
    }

    /* 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(*tp) && (tp < sp)) {
                    *tp = '\0';
                    tp--;
                }
                *ep = '\0';
                ep++;
                /* Skip over trailing whitespace of ep */
                while (isspace(*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.
 */
/*ARGSUSED*/
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);
        krb5_xfree(rparams);
    }
    return (0);
}