/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * Copyright 1994, 2008 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.
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/* Base functions for a kadmin command line interface using the OVSecure
 * library */

/* for "_" macro */
#include "k5-int.h"
#include <kadm5/admin.h>
#include <adm_proto.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <math.h>
#include <unistd.h>
#include <pwd.h>
/* #include <sys/timeb.h> */
#include <time.h>
#include "kadmin.h"

static krb5_boolean script_mode = FALSE;
int exit_status = 0;
char *def_realm = NULL;
char *whoami = NULL;

void *handle = NULL;
krb5_context context;
char *ccache_name = NULL;

int locked = 0;

static void
info(const char *fmt, ...)
#if !defined(__cplusplus) && (__GNUC__ > 2)
    __attribute__((__format__(__printf__, 1, 2)))
#endif
    ;

static void
error(const char *fmt, ...)
#if !defined(__cplusplus) && (__GNUC__ > 2)
    __attribute__((__format__(__printf__, 1, 2)))
#endif
    ;

/* Like printf, but suppressed if script_mode is set. */
static void
info(const char *fmt, ...)
{
    va_list ap;

    if (script_mode)
        return;
    va_start(ap, fmt);
    vprintf(fmt, ap);
    va_end(ap);
}

/* Like fprintf to stderr; also set exit_status if script_mode is set. */
static void
error(const char *fmt, ...)
{
    va_list ap;

    if (script_mode)
        exit_status = 1;
    va_start(ap, fmt);
    vfprintf(stderr, fmt, ap);
    va_end(ap);
}

static void
usage()
{
    error(_("Usage: %s [-r realm] [-p principal] [-q query] "
            "[clnt|local args]\n"
            "              [command args...]\n"
            "\tclnt args: [-s admin_server[:port]] "
            "[[-c ccache]|[-k [-t keytab]]]|[-n]\n"
            "\tlocal args: [-x db_args]* [-d dbname] "
            "[-e \"enc:salt ...\"] [-m]"
            "where,\n\t[-x db_args]* - any number of database specific "
            "arguments.\n"
            "\t\t\tLook at each database documentation for supported "
            "arguments\n"), whoami);
    exit(1);
}

static char *
strdur(time_t duration)
{
    static char out[50];
    int neg, days, hours, minutes, seconds;

    if (duration < 0) {
        duration *= -1;
        neg = 1;
    } else
        neg = 0;
    days = duration / (24 * 3600);
    duration %= 24 * 3600;
    hours = duration / 3600;
    duration %= 3600;
    minutes = duration / 60;
    duration %= 60;
    seconds = duration;
    snprintf(out, sizeof(out), "%s%d %s %02d:%02d:%02d", neg ? "-" : "",
             days, days == 1 ? "day" : "days",
             hours, minutes, seconds);
    return out;
}

static const char *
strdate(krb5_timestamp when)
{
    struct tm *tm;
    static char out[40];
    time_t lcltim = ts2tt(when);

    tm = localtime(&lcltim);
    if (tm == NULL ||
        strftime(out, sizeof(out), "%a %b %d %H:%M:%S %Z %Y", tm) == 0)
        strlcpy(out, "(error)", sizeof(out));
    return out;
}

/* Parse a date string using getdate.y.  On failure, output an error message
 * and return (time_t)-1. */
static time_t
parse_date(char *str, time_t now)
{
    time_t date;

    date = get_date_rel(str, now);
    if (date == (time_t)-1)
        error(_("Invalid date specification \"%s\".\n"), str);
    return date;
}

/*
 * Parse a time interval.  Use krb5_string_to_deltat() if it works; otherwise
 * use getdate.y and subtract now, with sanity checks.  On failure, output an
 * error message and return (time_t)-1.
 */
static time_t
parse_interval(char *str, time_t now)
{
    time_t date;
    krb5_deltat delta;

    if (krb5_string_to_deltat(str, &delta) == 0)
        return delta;

    date = parse_date(str, now);
    if (date == (time_t)-1)
        return date;

    /* Interpret an absolute time of 0 (e.g. "never") as an interval of 0. */
    if (date == 0)
        return 0;

    /* Don't return a negative interval if the date is in the past. */
    if (date < now) {
        error(_("Interval specification \"%s\" is in the past.\n"), str);
        return (time_t)-1;
    }

    return date - now;
}

/* this is a wrapper to go around krb5_parse_principal so we can set
   the default realm up properly */
static krb5_error_code
kadmin_parse_name(char *name, krb5_principal *principal)
{
    char *cp, *fullname;
    krb5_error_code retval;
    int result;

    /* assumes def_realm is initialized! */
    cp = strchr(name, '@');
    while (cp) {
        if (cp - name && *(cp - 1) != '\\')
            break;
        else
            cp = strchr(cp + 1, '@');
    }
    if (cp == NULL)
        result = asprintf(&fullname, "%s@%s", name, def_realm);
    else
        result = asprintf(&fullname, "%s", name);
    if (result < 0)
        return ENOMEM;
    retval = krb5_parse_name(context, fullname, principal);
    free(fullname);
    return retval;
}

static void
extended_com_err_fn(const char *myprog, errcode_t code,
                    const char *fmt, va_list args)
{
    const char *emsg;

    if (code) {
        emsg = krb5_get_error_message(context, code);
        error("%s: %s ", myprog, emsg);
        krb5_free_error_message(context, emsg);
    } else {
        error("%s: ", myprog);
    }
    vfprintf(stderr, fmt, args);
    error("\n");
}

/* Create a principal using the oldest appropriate kadm5 API. */
static krb5_error_code
create_princ(kadm5_principal_ent_rec *princ, long mask, int n_ks,
             krb5_key_salt_tuple *ks, char *pass)
{
    if (ks)
        return kadm5_create_principal_3(handle, princ, mask, n_ks, ks, pass);
    else
        return kadm5_create_principal(handle, princ, mask, pass);
}

/* Randomize a principal's password using the appropriate kadm5 API. */
krb5_error_code
randkey_princ(void *lhandle, krb5_principal princ, krb5_boolean keepold,
              int n_ks, krb5_key_salt_tuple *ks, krb5_keyblock **key,
              int *n_keys)
{
    krb5_error_code ret;

    /* Try the newer API first, because the Solaris kadmind only creates DES
     * keys when the old API is used. */
    ret = kadm5_randkey_principal_3(lhandle, princ, keepold, n_ks, ks, key,
                                    n_keys);

    /* Fall back to the old version if we get an error and aren't using any new
     * parameters. */
    if (ret == KADM5_RPC_ERROR && !keepold && ks == NULL)
        ret = kadm5_randkey_principal(lhandle, princ, key, n_keys);

    return ret;
}

static krb5_boolean
policy_exists(const char *name)
{
    kadm5_policy_ent_rec pol;

    if (kadm5_get_policy(handle, (char *)name, &pol) != 0)
        return FALSE;
    kadm5_free_policy_ent(handle, &pol);
    return TRUE;
}

void
kadmin_startup(int argc, char *argv[], char **request_out, char ***args_out)
{
    extern char *optarg;
    char *princstr = NULL, *keytab_name = NULL, *query = NULL;
    char *password = NULL;
    char *luser, *canon, *cp;
    int optchar, freeprinc = 0, use_keytab = 0, use_anonymous = 0;
    struct passwd *pw;
    kadm5_ret_t retval;
    krb5_ccache cc;
    krb5_principal princ;
    kadm5_config_params params;
    char **db_args = NULL;
    int db_args_size = 0;
    char *db_name = NULL;
    char *svcname, *realm;

    memset(&params, 0, sizeof(params));

    set_com_err_hook(extended_com_err_fn);

    retval = kadm5_init_krb5_context(&context);
    if (retval) {
        com_err(whoami, retval, _("while initializing krb5 library"));
        exit(1);
    }

    while ((optchar = getopt(argc, argv,
                             "+x:r:p:knq:w:d:s:mc:t:e:ON")) != EOF) {
        switch (optchar) {
        case 'x':
            db_args_size++;
            db_args = realloc(db_args, sizeof(char*) * (db_args_size + 1));
            if (db_args == NULL) {
                error(_("%s: Cannot initialize. Not enough memory\n"), whoami);
                exit(1);
            }
            db_args[db_args_size - 1] = optarg;
            db_args[db_args_size] = NULL;
            break;

        case 'r':
            def_realm = optarg;
            break;
        case 'p':
            princstr = optarg;
            break;
        case 'c':
            ccache_name = optarg;
            break;
        case 'k':
            use_keytab++;
            break;
        case 'n':
            use_anonymous++;
            break;
        case 't':
            keytab_name = optarg;
            break;
        case 'w':
            password = optarg;
            break;
        case 'q':
            query = optarg;
            break;
        case 'd':
            /* db_name has to be passed as part of the db_args. */
            free(db_name);
            asprintf(&db_name, "dbname=%s", optarg);

            db_args_size++;
            db_args = realloc(db_args, sizeof(char*) * (db_args_size + 1));
            if (db_args == NULL) {
                error(_("%s: Cannot initialize. Not enough memory\n"), whoami);
                exit(1);
            }
            db_args[db_args_size - 1] = db_name;
            db_args[db_args_size] = NULL;
            break;
        case 's':
            params.admin_server = optarg;
            params.mask |= KADM5_CONFIG_ADMIN_SERVER;
            break;
        case 'm':
            params.mkey_from_kbd = 1;
            params.mask |= KADM5_CONFIG_MKEY_FROM_KBD;
            break;
        case 'e':
            retval = krb5_string_to_keysalts(optarg, NULL, NULL, 0,
                                             &params.keysalts,
                                             &params.num_keysalts);
            if (retval) {
                com_err(whoami, retval, _("while parsing keysalts %s"),
                        optarg);
                exit(1);
            }
            params.mask |= KADM5_CONFIG_ENCTYPES;
            break;
        case 'O':
            params.mask |= KADM5_CONFIG_OLD_AUTH_GSSAPI;
            break;
        case 'N':
            params.mask |= KADM5_CONFIG_AUTH_NOFALLBACK;
            break;
        default:
            usage();
        }
    }
    if ((ccache_name && use_keytab) ||
        (keytab_name && !use_keytab) ||
        (ccache_name && use_anonymous) ||
        (use_anonymous && use_keytab))
        usage();

    if (query != NULL && argv[optind] != NULL) {
        error(_("%s: -q is exclusive with command-line query"), whoami);
        usage();
    }

    if (argv[optind] != NULL)
        script_mode = TRUE;

    if (def_realm == NULL && krb5_get_default_realm(context, &def_realm)) {
        error(_("%s: unable to get default realm\n"), whoami);
        exit(1);
    }

    params.mask |= KADM5_CONFIG_REALM;
    params.realm = def_realm;

    if (params.mask & KADM5_CONFIG_OLD_AUTH_GSSAPI)
        svcname = KADM5_ADMIN_SERVICE;
    else
        svcname = NULL;

    /*
     * Set cc to an open credentials cache, either specified by the -c
     * argument or the default.
     */
    if (ccache_name == NULL) {
        retval = krb5_cc_default(context, &cc);
        if (retval) {
            com_err(whoami, retval,
                    _("while opening default credentials cache"));
            exit(1);
        }
    } else {
        retval = krb5_cc_resolve(context, ccache_name, &cc);
        if (retval) {
            com_err(whoami, retval, _("while opening credentials cache %s"),
                    ccache_name);
            exit(1);
        }
    }

    /*
     * If no principal name is specified: If authenticating anonymously, use
     * the anonymouse principal for the local realm, else if a ccache was
     * specified and its primary principal name can be read, it is used, else
     * if a keytab was specified, the principal name is host/hostname,
     * otherwise append "/admin" to the primary name of the default ccache,
     * $USER, or pw_name.
     *
     * Gee, 100+ lines to figure out the client principal name.  This
     * should be compressed...
     */

    if (princstr == NULL) {
        if (use_anonymous) {
            if (asprintf(&princstr, "%s/%s@%s", KRB5_WELLKNOWN_NAMESTR,
                         KRB5_ANONYMOUS_PRINCSTR, def_realm) < 0) {
                error(_("%s: out of memory\n"), whoami);
                exit(1);
            }
            freeprinc++;
        } else if (ccache_name != NULL &&
            !krb5_cc_get_principal(context, cc, &princ)) {
            retval = krb5_unparse_name(context, princ, &princstr);
            if (retval) {
                com_err(whoami, retval,
                        _("while canonicalizing principal name"));
                exit(1);
            }
            krb5_free_principal(context, princ);
            freeprinc++;
        } else if (use_keytab != 0) {
            retval = krb5_sname_to_principal(context, NULL, "host",
                                             KRB5_NT_SRV_HST, &princ);
            if (retval) {
                com_err(whoami, retval, _("creating host service principal"));
                exit(1);
            }
            retval = krb5_unparse_name(context, princ, &princstr);
            if (retval) {
                com_err(whoami, retval,
                        _("while canonicalizing principal name"));
                exit(1);
            }
            krb5_free_principal(context, princ);
            freeprinc++;
        } else if (!krb5_cc_get_principal(context, cc, &princ)) {
            if (krb5_unparse_name(context, princ, &canon)) {
                error(_("%s: unable to canonicalize principal\n"), whoami);
                exit(1);
            }
            /* Strip out realm of principal if it's there. */
            realm = strchr(canon, '@');
            while (realm) {
                if (realm > canon && *(realm - 1) != '\\')
                    break;
                realm = strchr(realm + 1, '@');
            }
            if (realm)
                *realm++ = '\0';
            cp = strchr(canon, '/');
            while (cp) {
                if (cp > canon && *(cp - 1) != '\\')
                    break;
                cp = strchr(cp + 1, '/');
            }
            if (cp != NULL)
                *cp = '\0';
            if (asprintf(&princstr, "%s/admin%s%s", canon,
                         (realm) ? "@" : "",
                         (realm) ? realm : "") < 0) {
                error(_("%s: out of memory\n"), whoami);
                exit(1);
            }
            free(canon);
            krb5_free_principal(context, princ);
            freeprinc++;
        } else if ((luser = getenv("USER"))) {
            if (asprintf(&princstr, "%s/admin@%s", luser, def_realm) < 0) {
                error(_("%s: out of memory\n"), whoami);
                exit(1);
            }
            freeprinc++;
        } else if ((pw = getpwuid(getuid()))) {
            if (asprintf(&princstr, "%s/admin@%s", pw->pw_name,
                         def_realm) < 0) {
                error(_("%s: out of memory\n"), whoami);
                exit(1);
            }
            freeprinc++;
        } else {
            error(_("%s: unable to figure out a principal name\n"), whoami);
            exit(1);
        }
    }

    retval = krb5_klog_init(context, "admin_server", whoami, 0);
    if (retval) {
        com_err(whoami, retval, _("while setting up logging"));
        exit(1);
    }

    /*
     * Initialize the kadm5 connection.  If we were given a ccache,
     * use it.  Otherwise, use/prompt for the password.
     */
    if (ccache_name) {
        info(_("Authenticating as principal %s with existing "
               "credentials.\n"), princstr);
        retval = kadm5_init_with_creds(context, princstr, cc, svcname, &params,
                                       KADM5_STRUCT_VERSION,
                                       KADM5_API_VERSION_4, db_args, &handle);
    } else if (use_anonymous) {
        info(_("Authenticating as principal %s with password; "
               "anonymous requested.\n"), princstr);
        retval = kadm5_init_anonymous(context, princstr, svcname, &params,
                                      KADM5_STRUCT_VERSION,
                                      KADM5_API_VERSION_4, db_args, &handle);
    } else if (use_keytab) {
        if (keytab_name != NULL) {
            info(_("Authenticating as principal %s with keytab %s.\n"),
                 princstr, keytab_name);
        } else {
            info(_("Authenticating as principal %s with default keytab.\n"),
                 princstr);
        }
        retval = kadm5_init_with_skey(context, princstr, keytab_name, svcname,
                                      &params, KADM5_STRUCT_VERSION,
                                      KADM5_API_VERSION_4, db_args, &handle);
    } else {
        info(_("Authenticating as principal %s with password.\n"),
             princstr);
        retval = kadm5_init_with_password(context, princstr, password, svcname,
                                          &params, KADM5_STRUCT_VERSION,
                                          KADM5_API_VERSION_4, db_args,
                                          &handle);
    }
    if (retval) {
        com_err(whoami, retval, _("while initializing %s interface"), whoami);
        if (retval == KADM5_BAD_CLIENT_PARAMS ||
            retval == KADM5_BAD_SERVER_PARAMS)
            usage();
        exit(1);
    }
    if (freeprinc)
        free(princstr);

    free(params.keysalts);
    free(db_name);
    free(db_args);

    retval = krb5_cc_close(context, cc);
    if (retval) {
        com_err(whoami, retval, _("while closing ccache %s"), ccache_name);
        exit(1);
    }

    retval = kadm5_init_iprop(handle, 0);
    if (retval) {
        com_err(whoami, retval, _("while mapping update log"));
        exit(1);
    }

    *request_out = query;
    *args_out = argv + optind;
}

int
quit()
{
    kadm5_ret_t retval;

    if (locked) {
        retval = kadm5_unlock(handle);
        if (retval) {
            com_err("quit", retval, _("while unlocking locked database"));
            return 1;
        }
        locked = 0;
    }

    kadm5_destroy(handle);
    if (ccache_name != NULL && !script_mode) {
        fprintf(stderr, "\n\a\a\a%s",
                _("Administration credentials NOT DESTROYED.\n"));
    }

    /* insert more random cleanup here */
    krb5_klog_close(context);
    krb5_free_context(context);
    return 0;
}

void
kadmin_lock(int argc, char *argv[])
{
    kadm5_ret_t retval;

    if (locked)
        return;
    retval = kadm5_lock(handle);
    if (retval) {
        com_err("lock", retval, "");
        return;
    }
    locked = 1;
}

void
kadmin_unlock(int argc, char *argv[])
{
    kadm5_ret_t retval;

    if (!locked)
        return;
    retval = kadm5_unlock(handle);
    if (retval) {
        com_err("unlock", retval, "");
        return;
    }
    locked = 0;
}

void
kadmin_delprinc(int argc, char *argv[])
{
    kadm5_ret_t retval;
    krb5_principal princ = NULL;
    char *canon = NULL;
    char reply[5];

    if (! (argc == 2 ||
           (argc == 3 && !strcmp("-force", argv[1])))) {
        error(_("usage: delete_principal [-force] principal\n"));
        return;
    }
    retval = kadmin_parse_name(argv[argc - 1], &princ);
    if (retval) {
        com_err("delete_principal", retval, _("while parsing principal name"));
        return;
    }
    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("delete_principal", retval,
                _("while canonicalizing principal"));
        goto cleanup;
    }
    if (argc == 2 && !script_mode) {
        printf(_("Are you sure you want to delete the principal \"%s\"? "
                 "(yes/no): "), canon);
        fgets(reply, sizeof (reply), stdin);
        if (strcmp("yes\n", reply)) {
            fprintf(stderr, _("Principal \"%s\" not deleted\n"), canon);
            goto cleanup;
        }
    }
    retval = kadm5_delete_principal(handle, princ);
    if (retval) {
        com_err("delete_principal", retval,
                _("while deleting principal \"%s\""), canon);
        goto cleanup;
    }
    info(_("Principal \"%s\" deleted.\n"), canon);
    info(_("Make sure that you have removed this principal from all ACLs "
           "before reusing.\n"));

cleanup:
    krb5_free_principal(context, princ);
    free(canon);
}

void
kadmin_renameprinc(int argc, char *argv[])
{
    kadm5_ret_t retval;
    krb5_principal oprinc = NULL, nprinc = NULL;
    char *ocanon = NULL, *ncanon = NULL;
    char reply[5];

    if (!(argc == 3 || (argc == 4 && !strcmp("-force", argv[1])))) {
        error(_("usage: rename_principal [-force] old_principal "
                "new_principal\n"));
        return;
    }
    retval = kadmin_parse_name(argv[argc - 2], &oprinc);
    if (retval) {
        com_err("rename_principal", retval,
                _("while parsing old principal name"));
        goto cleanup;
    }
    retval = kadmin_parse_name(argv[argc - 1], &nprinc);
    if (retval) {
        com_err("rename_principal", retval,
                _("while parsing new principal name"));
        goto cleanup;
    }
    retval = krb5_unparse_name(context, oprinc, &ocanon);
    if (retval) {
        com_err("rename_principal", retval,
                _("while canonicalizing old principal"));
        goto cleanup;
    }
    retval = krb5_unparse_name(context, nprinc, &ncanon);
    if (retval) {
        com_err("rename_principal", retval,
                _("while canonicalizing new principal"));
        goto cleanup;
    }
    if (argc == 3 && !script_mode) {
        printf(_("Are you sure you want to rename the principal \"%s\" "
                 "to \"%s\"? (yes/no): "), ocanon, ncanon);
        fgets(reply, sizeof(reply), stdin);
        if (strcmp("yes\n", reply)) {
            fprintf(stderr, _("Principal \"%s\" not renamed\n"), ocanon);
            goto cleanup;
        }
    }
    retval = kadm5_rename_principal(handle, oprinc, nprinc);
    if (retval) {
        com_err("rename_principal", retval,
                _("while renaming principal \"%s\" to \"%s\""),
                ocanon, ncanon);
        goto cleanup;
    }
    info(_("Principal \"%s\" renamed to \"%s\".\n"), ocanon, ncanon);
    info(_("Make sure that you have removed the old principal from all ACLs "
           "before reusing.\n"));

cleanup:
    krb5_free_principal(context, nprinc);
    krb5_free_principal(context, oprinc);
    free(ncanon);
    free(ocanon);
}

static void
cpw_usage(const char *str)
{
    if (str)
        error("%s\n", str);
    error(_("usage: change_password [-randkey] [-keepold] "
            "[-e keysaltlist] [-pw password] principal\n"));
}

void
kadmin_cpw(int argc, char *argv[])
{
    kadm5_ret_t retval;
    static char newpw[1024];
    static char prompt1[1024], prompt2[1024];
    char *canon = NULL, *pwarg = NULL;
    int n_ks_tuple = 0, randkey = 0;
    krb5_boolean keepold = FALSE;
    krb5_key_salt_tuple *ks_tuple = NULL;
    krb5_principal princ = NULL;
    char **db_args = NULL;
    int db_args_size = 0;

    if (argc < 1) {
        cpw_usage(NULL);
        return;
    }
    for (argv++, argc--; argc > 0 && **argv == '-'; argc--, argv++) {
        if (!strcmp("-x", *argv)) {
            argc--;
            if (argc < 1) {
                cpw_usage(_("change_password: missing db argument"));
                goto cleanup;
            }
            db_args_size++;
            db_args = realloc(db_args, sizeof(char*) * (db_args_size + 1));
            if (db_args == NULL) {
                error(_("change_password: Not enough memory\n"));
                exit(1);
            }
            db_args[db_args_size - 1] = *++argv;
            db_args[db_args_size] = NULL;
        } else if (!strcmp("-pw", *argv)) {
            argc--;
            if (argc < 1) {
                cpw_usage(_("change_password: missing password arg"));
                goto cleanup;
            }
            pwarg = *++argv;
        } else if (!strcmp("-randkey", *argv)) {
            randkey++;
        } else if (!strcmp("-keepold", *argv)) {
            keepold = TRUE;
        } else if (!strcmp("-e", *argv)) {
            argc--;
            if (argc < 1) {
                cpw_usage(_("change_password: missing keysaltlist arg"));
                goto cleanup;
            }
            retval = krb5_string_to_keysalts(*++argv, NULL, NULL, 0,
                                             &ks_tuple, &n_ks_tuple);
            if (retval) {
                com_err("change_password", retval,
                        _("while parsing keysalts %s"), *argv);
                goto cleanup;
            }
        } else {
            com_err("change_password", 0, _("unrecognized option %s"), *argv);
            cpw_usage(NULL);
            goto cleanup;
        }
    }
    if (argc != 1) {
        if (argc < 1)
            com_err("change_password", 0, _("missing principal name"));
        else
            com_err("change_password", 0, _("too many arguments"));
        cpw_usage(NULL);
        goto cleanup;
    }
    retval = kadmin_parse_name(*argv, &princ);
    if (retval) {
        com_err("change_password", retval, _("while parsing principal name"));
        goto cleanup;
    }
    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("change_password", retval,
                _("while canonicalizing principal"));
        goto cleanup;
    }
    if (pwarg != NULL) {
        if (keepold || ks_tuple != NULL) {
            retval = kadm5_chpass_principal_3(handle, princ, keepold,
                                              n_ks_tuple, ks_tuple, pwarg);
        } else {
            retval = kadm5_chpass_principal(handle, princ, pwarg);
        }
        if (retval) {
            com_err("change_password", retval,
                    _("while changing password for \"%s\"."), canon);
            goto cleanup;
        }
        info(_("Password for \"%s\" changed.\n"), canon);
    } else if (randkey) {
        retval = randkey_princ(handle, princ, keepold, n_ks_tuple, ks_tuple,
                               NULL, NULL);
        if (retval) {
            com_err("change_password", retval,
                    _("while randomizing key for \"%s\"."), canon);
            goto cleanup;
        }
        info(_("Key for \"%s\" randomized.\n"), canon);
    } else {
        unsigned int i = sizeof (newpw) - 1;

        snprintf(prompt1, sizeof(prompt1),
                 _("Enter password for principal \"%s\""), canon);
        snprintf(prompt2, sizeof(prompt2),
                 _("Re-enter password for principal \"%s\""), canon);
        retval = krb5_read_password(context, prompt1, prompt2,
                                    newpw, &i);
        if (retval) {
            com_err("change_password", retval,
                    _("while reading password for \"%s\"."), canon);
            goto cleanup;
        }
        if (keepold || ks_tuple != NULL) {
            retval = kadm5_chpass_principal_3(handle, princ, keepold,
                                              n_ks_tuple, ks_tuple,
                                              newpw);
        } else {
            retval = kadm5_chpass_principal(handle, princ, newpw);
        }
        memset(newpw, 0, sizeof (newpw));
        if (retval) {
            com_err("change_password", retval,
                    _("while changing password for \"%s\"."), canon);
            goto cleanup;
        }
        info(_("Password for \"%s\" changed.\n"), canon);
    }
cleanup:
    free(canon);
    free(db_args);
    krb5_free_principal(context, princ);
    free(ks_tuple);
}

static void
kadmin_free_tl_data(krb5_int16 *n_tl_datap, krb5_tl_data **tl_datap)
{
    krb5_tl_data *tl_data = *tl_datap, *next;
    int n_tl_data = *n_tl_datap;
    int i;

    *n_tl_datap = 0;
    *tl_datap = NULL;

    for (i = 0; tl_data && (i < n_tl_data); i++) {
        next = tl_data->tl_data_next;
        free(tl_data->tl_data_contents);
        free(tl_data);
        tl_data = next;
    }
}

/* Construct a tl_data element and add it to the tail of *tl_datap. */
static void
add_tl_data(krb5_int16 *n_tl_datap, krb5_tl_data **tl_datap,
            krb5_int16 tl_type, krb5_ui_2 len, krb5_octet *contents)
{
    krb5_tl_data *tl_data;
    krb5_octet *copy;

    copy = malloc(len);
    tl_data = calloc(1, sizeof(*tl_data));
    if (copy == NULL || tl_data == NULL) {
        error(_("Not enough memory\n"));
        exit(1);
    }
    memcpy(copy, contents, len);

    tl_data->tl_data_type = tl_type;
    tl_data->tl_data_length = len;
    tl_data->tl_data_contents = copy;
    tl_data->tl_data_next = NULL;

    for (; *tl_datap != NULL; tl_datap = &(*tl_datap)->tl_data_next);
    *tl_datap = tl_data;
    (*n_tl_datap)++;
}

static void
unlock_princ(kadm5_principal_ent_t princ, long *mask, const char *caller)
{
    krb5_error_code retval;
    krb5_timestamp now;
    krb5_octet timebuf[4];

    /* Zero out the failed auth count. */
    princ->fail_auth_count = 0;
    *mask |= KADM5_FAIL_AUTH_COUNT;

    /* Record the timestamp of this unlock operation so that replica KDCs will
     * see it, since fail_auth_count is unreplicated. */
    retval = krb5_timeofday(context, &now);
    if (retval) {
        com_err(caller, retval, _("while getting time"));
        exit(1);
    }
    store_32_le((krb5_int32)now, timebuf);
    add_tl_data(&princ->n_tl_data, &princ->tl_data,
                KRB5_TL_LAST_ADMIN_UNLOCK, 4, timebuf);
    *mask |= KADM5_TL_DATA;
}

/*
 * Parse addprinc or modprinc arguments.  Some output fields may be
 * filled in on error.
 */
static int
kadmin_parse_princ_args(int argc, char *argv[], kadm5_principal_ent_t oprinc,
                        long *mask, char **pass, krb5_boolean *randkey,
                        krb5_boolean *nokey, krb5_key_salt_tuple **ks_tuple,
                        int *n_ks_tuple, char *caller)
{
    int i;
    time_t now, date, interval;
    krb5_error_code retval;

    *mask = 0;
    *pass = NULL;
    *n_ks_tuple = 0;
    *ks_tuple = NULL;
    time(&now);
    *randkey = FALSE;
    *nokey = FALSE;
    for (i = 1; i < argc - 1; i++) {
        if (!strcmp("-x",argv[i])) {
            if (++i > argc - 2)
                return -1;

            add_tl_data(&oprinc->n_tl_data, &oprinc->tl_data,
                        KRB5_TL_DB_ARGS, strlen(argv[i]) + 1,
                        (krb5_octet *)argv[i]);
            *mask |= KADM5_TL_DATA;
            continue;
        }
        if (!strcmp("-expire", argv[i])) {
            if (++i > argc - 2)
                return -1;
            date = parse_date(argv[i], now);
            if (date == (time_t)-1)
                return -1;
            oprinc->princ_expire_time = date;
            *mask |= KADM5_PRINC_EXPIRE_TIME;
            continue;
        }
        if (!strcmp("-pwexpire", argv[i])) {
            if (++i > argc - 2)
                return -1;
            date = parse_date(argv[i], now);
            if (date == (time_t)-1)
                return -1;
            oprinc->pw_expiration = date;
            *mask |= KADM5_PW_EXPIRATION;
            continue;
        }
        if (!strcmp("-maxlife", argv[i])) {
            if (++i > argc - 2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            oprinc->max_life = interval;
            *mask |= KADM5_MAX_LIFE;
            continue;
        }
        if (!strcmp("-maxrenewlife", argv[i])) {
            if (++i > argc - 2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            oprinc->max_renewable_life = interval;
            *mask |= KADM5_MAX_RLIFE;
            continue;
        }
        if (!strcmp("-kvno", argv[i])) {
            if (++i > argc - 2)
                return -1;
            oprinc->kvno = atoi(argv[i]);
            *mask |= KADM5_KVNO;
            continue;
        }
        if (!strcmp("-policy", argv[i])) {
            if (++i > argc - 2)
                return -1;
            oprinc->policy = argv[i];
            *mask |= KADM5_POLICY;
            continue;
        }
        if (!strcmp("-clearpolicy", argv[i])) {
            oprinc->policy = NULL;
            *mask |= KADM5_POLICY_CLR;
            continue;
        }
        if (!strcmp("-pw", argv[i])) {
            if (++i > argc - 2)
                return -1;
            *pass = argv[i];
            continue;
        }
        if (!strcmp("-randkey", argv[i])) {
            *randkey = TRUE;
            continue;
        }
        if (!strcmp("-nokey", argv[i])) {
            *nokey = TRUE;
            continue;
        }
        if (!strcmp("-unlock", argv[i])) {
            unlock_princ(oprinc, mask, caller);
            continue;
        }
        if (!strcmp("-e", argv[i])) {
            if (++i > argc - 2)
                return -1;
            retval = krb5_string_to_keysalts(argv[i], NULL, NULL, 0,
                                             ks_tuple, n_ks_tuple);
            if (retval) {
                com_err(caller, retval, _("while parsing keysalts %s"),
                        argv[i]);
                return -1;
            }
            continue;
        }
        retval = krb5_flagspec_to_mask(argv[i], &oprinc->attributes,
                                       &oprinc->attributes);
        if (retval)
            return -1;
        else
            *mask |= KADM5_ATTRIBUTES;
    }
    if (i != argc - 1)
        return -1;
    retval = kadmin_parse_name(argv[i], &oprinc->principal);
    if (retval) {
        com_err(caller, retval, _("while parsing principal"));
        return -1;
    }
    return 0;
}

static void
kadmin_addprinc_usage()
{
    error(_("usage: add_principal [options] principal\n"));
    error(_("\toptions are:\n"));
    error(_("\t\t[-randkey|-nokey] [-x db_princ_args]* [-expire expdate] "
            "[-pwexpire pwexpdate] [-maxlife maxtixlife]\n"
            "\t\t[-kvno kvno] [-policy policy] [-clearpolicy]\n"
            "\t\t[-pw password] [-maxrenewlife maxrenewlife]\n"
            "\t\t[-e keysaltlist]\n\t\t[{+|-}attribute]\n"));
    error(_("\tattributes are:\n"));
    error(_("\t\tallow_postdated allow_forwardable allow_tgs_req "
            "allow_renewable\n"
            "\t\tallow_proxiable allow_dup_skey allow_tix requires_preauth\n"
            "\t\trequires_hwauth needchange allow_svr "
            "password_changing_service\n"
            "\t\tok_as_delegate ok_to_auth_as_delegate no_auth_data_required\n"
            "\t\tlockdown_keys\n"
            "\nwhere,\n\t[-x db_princ_args]* - any number of database "
            "specific arguments.\n"
            "\t\t\tLook at each database documentation for supported "
            "arguments\n"));
}

static void
kadmin_modprinc_usage()
{
    error(_("usage: modify_principal [options] principal\n"));
    error(_("\toptions are:\n"));
    error(_("\t\t[-x db_princ_args]* [-expire expdate] "
            "[-pwexpire pwexpdate] [-maxlife maxtixlife]\n"
            "\t\t[-kvno kvno] [-policy policy] [-clearpolicy]\n"
            "\t\t[-maxrenewlife maxrenewlife] [-unlock] [{+|-}attribute]\n"));
    error(_("\tattributes are:\n"));
    error(_("\t\tallow_postdated allow_forwardable allow_tgs_req "
            "allow_renewable\n"
            "\t\tallow_proxiable allow_dup_skey allow_tix requires_preauth\n"
            "\t\trequires_hwauth needchange allow_svr "
            "password_changing_service\n"
            "\t\tok_as_delegate ok_to_auth_as_delegate no_auth_data_required\n"
            "\t\tlockdown_keys\n"
            "\nwhere,\n\t[-x db_princ_args]* - any number of database "
            "specific arguments.\n"
            "\t\t\tLook at each database documentation for supported "
            "arguments\n"));
}

/* Create a dummy password for old-style (pre-1.8) randkey creation. */
static void
prepare_dummy_password(char *buf, size_t sz)
{
    size_t i;

    /* Must try to pass any password policy in place, and be valid UTF-8. */
    strlcpy(buf, "6F a[", sz);
    for (i = strlen(buf); i < sz - 1; i++)
        buf[i] = 'a' + (i % 26);
    buf[sz - 1] = '\0';
}

void
kadmin_addprinc(int argc, char *argv[])
{
    kadm5_principal_ent_rec princ;
    long mask;
    krb5_boolean randkey = FALSE, nokey = FALSE, old_style_randkey = FALSE;
    int n_ks_tuple;
    krb5_key_salt_tuple *ks_tuple = NULL;
    char *pass, *canon = NULL;
    krb5_error_code retval;
    char newpw[1024], dummybuf[256];
    static char prompt1[1024], prompt2[1024];

    /* Zero all fields in request structure */
    memset(&princ, 0, sizeof(princ));

    princ.attributes = 0;
    if (kadmin_parse_princ_args(argc, argv, &princ, &mask, &pass, &randkey,
                                &nokey, &ks_tuple, &n_ks_tuple,
                                "add_principal")) {
        kadmin_addprinc_usage();
        goto cleanup;
    }

    retval = krb5_unparse_name(context, princ.principal, &canon);
    if (retval) {
        com_err("add_principal", retval, _("while canonicalizing principal"));
        goto cleanup;
    }

    if (mask & KADM5_POLICY) {
        /* Warn if the specified policy does not exist. */
        if (!script_mode && !policy_exists(princ.policy)) {
            fprintf(stderr, _("WARNING: policy \"%s\" does not exist\n"),
                    princ.policy);
        }
    } else if (!(mask & KADM5_POLICY_CLR)) {
        /* If the policy "default" exists, assign it. */
        if (policy_exists("default")) {
            if (!script_mode) {
                fprintf(stderr, _("No policy specified for %s; "
                                  "assigning \"default\"\n"), canon);
            }
            princ.policy = "default";
            mask |= KADM5_POLICY;
        } else if (!script_mode) {
            fprintf(stderr, _("No policy specified for %s; "
                              "defaulting to no policy\n"), canon);
        }
    }
    /* Don't send KADM5_POLICY_CLR to the server. */
    mask &= ~KADM5_POLICY_CLR;

    if (nokey) {
        pass = NULL;
        mask |= KADM5_KEY_DATA;
    } else if (randkey) {
        pass = NULL;
    } else if (pass == NULL) {
        unsigned int sz = sizeof(newpw) - 1;

        snprintf(prompt1, sizeof(prompt1),
                 _("Enter password for principal \"%s\""), canon);
        snprintf(prompt2, sizeof(prompt2),
                 _("Re-enter password for principal \"%s\""), canon);
        retval = krb5_read_password(context, prompt1, prompt2, newpw, &sz);
        if (retval) {
            com_err("add_principal", retval,
                    _("while reading password for \"%s\"."), canon);
            goto cleanup;
        }
        pass = newpw;
    }
    mask |= KADM5_PRINCIPAL;
    retval = create_princ(&princ, mask, n_ks_tuple, ks_tuple, pass);
    if (retval == EINVAL && randkey) {
        /*
         * The server doesn't support randkey creation.  Create the principal
         * with a dummy password and disallow tickets.
         */
        prepare_dummy_password(dummybuf, sizeof(dummybuf));
        princ.attributes |= KRB5_KDB_DISALLOW_ALL_TIX;
        mask |= KADM5_ATTRIBUTES;
        pass = dummybuf;
        retval = create_princ(&princ, mask, n_ks_tuple, ks_tuple, pass);
        old_style_randkey = 1;
    }
    if (retval == KADM5_BAD_MASK && nokey) {
        error(_("Admin server does not support -nokey while creating "
                "\"%s\"\n"), canon);
        goto cleanup;
    }
    if (retval) {
        com_err("add_principal", retval, "while creating \"%s\".", canon);
        goto cleanup;
    }
    if (old_style_randkey) {
        /* Randomize the password and re-enable tickets. */
        retval = randkey_princ(handle, princ.principal, FALSE, n_ks_tuple,
                               ks_tuple, NULL, NULL);
        if (retval) {
            com_err("add_principal", retval,
                    _("while randomizing key for \"%s\"."), canon);
            goto cleanup;
        }
        princ.attributes &= ~KRB5_KDB_DISALLOW_ALL_TIX; /* clear notix */
        mask = KADM5_ATTRIBUTES;
        retval = kadm5_modify_principal(handle, &princ, mask);
        if (retval) {
            com_err("add_principal", retval,
                    _("while clearing DISALLOW_ALL_TIX for \"%s\"."), canon);
            goto cleanup;
        }
    }
    info("Principal \"%s\" created.\n", canon);

cleanup:
    krb5_free_principal(context, princ.principal);
    free(ks_tuple);
    free(canon);
    kadmin_free_tl_data(&princ.n_tl_data, &princ.tl_data);
}

void
kadmin_modprinc(int argc, char *argv[])
{
    kadm5_principal_ent_rec princ, oldprinc;
    krb5_principal kprinc = NULL;
    long mask;
    krb5_error_code retval;
    char *pass, *canon = NULL;
    krb5_boolean randkey = FALSE, nokey = FALSE;
    int n_ks_tuple = 0;
    krb5_key_salt_tuple *ks_tuple = NULL;

    if (argc < 2) {
        kadmin_modprinc_usage();
        return;
    }

    memset(&oldprinc, 0, sizeof(oldprinc));
    memset(&princ, 0, sizeof(princ));

    retval = kadmin_parse_name(argv[argc - 1], &kprinc);
    if (retval) {
        com_err("modify_principal", retval, _("while parsing principal"));
        return;
    }
    retval = krb5_unparse_name(context, kprinc, &canon);
    if (retval) {
        com_err("modify_principal", retval,
                _("while canonicalizing principal"));
        goto cleanup;
    }
    retval = kadm5_get_principal(handle, kprinc, &oldprinc,
                                 KADM5_PRINCIPAL_NORMAL_MASK);
    if (retval) {
        com_err("modify_principal", retval, _("while getting \"%s\"."), canon);
        goto cleanup;
    }
    princ.attributes = oldprinc.attributes;
    kadm5_free_principal_ent(handle, &oldprinc);
    retval = kadmin_parse_princ_args(argc, argv,
                                     &princ, &mask,
                                     &pass, &randkey, &nokey,
                                     &ks_tuple, &n_ks_tuple,
                                     "modify_principal");
    if (retval || ks_tuple != NULL || randkey || nokey || pass) {
        kadmin_modprinc_usage();
        goto cleanup;
    }
    if (mask & KADM5_POLICY) {
        /* Warn if the specified policy does not exist. */
        if (!script_mode && !policy_exists(princ.policy)) {
            fprintf(stderr, _("WARNING: policy \"%s\" does not exist\n"),
                    princ.policy);
        }
    }
    if (mask) {
        /* Skip this if all we're doing is setting certhash. */
        retval = kadm5_modify_principal(handle, &princ, mask);
    }
    if (retval) {
        com_err("modify_principal", retval, _("while modifying \"%s\"."),
                canon);
        goto cleanup;
    }
    info(_("Principal \"%s\" modified.\n"), canon);
cleanup:
    krb5_free_principal(context, kprinc);
    krb5_free_principal(context, princ.principal);
    kadmin_free_tl_data(&princ.n_tl_data, &princ.tl_data);
    free(canon);
    free(ks_tuple);
}

void
kadmin_getprinc(int argc, char *argv[])
{
    kadm5_principal_ent_rec dprinc;
    krb5_principal princ = NULL;
    krb5_error_code retval;
    const char *polname, *noexist;
    char *canon = NULL, *princstr = NULL, *modprincstr = NULL;
    char **sp = NULL, **attrstrs = NULL;
    int i;

    if (!(argc == 2 || (argc == 3 && !strcmp("-terse", argv[1])))) {
        error(_("usage: get_principal [-terse] principal\n"));
        return;
    }

    memset(&dprinc, 0, sizeof(dprinc));

    retval = kadmin_parse_name(argv[argc - 1], &princ);
    if (retval) {
        com_err("get_principal", retval, _("while parsing principal"));
        return;
    }
    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("get_principal", retval, _("while canonicalizing principal"));
        goto cleanup;
    }
    retval = kadm5_get_principal(handle, princ, &dprinc,
                                 KADM5_PRINCIPAL_NORMAL_MASK | KADM5_KEY_DATA);
    if (retval) {
        com_err("get_principal", retval, _("while retrieving \"%s\"."), canon);
        goto cleanup;
    }
    retval = krb5_unparse_name(context, dprinc.principal, &princstr);
    if (retval) {
        com_err("get_principal", retval, _("while unparsing principal"));
        goto cleanup;
    }
    retval = krb5_unparse_name(context, dprinc.mod_name, &modprincstr);
    if (retval) {
        com_err("get_principal", retval, _("while unparsing principal"));
        goto cleanup;
    }
    if (argc == 2) {
        printf(_("Principal: %s\n"), princstr);
        printf(_("Expiration date: %s\n"), dprinc.princ_expire_time ?
               strdate(dprinc.princ_expire_time) : _("[never]"));
        printf(_("Last password change: %s\n"), dprinc.last_pwd_change ?
               strdate(dprinc.last_pwd_change) : _("[never]"));
        printf(_("Password expiration date: %s\n"),
               dprinc.pw_expiration ?
               strdate(dprinc.pw_expiration) : _("[never]"));
        printf(_("Maximum ticket life: %s\n"), strdur(dprinc.max_life));
        printf(_("Maximum renewable life: %s\n"),
               strdur(dprinc.max_renewable_life));
        printf(_("Last modified: %s (%s)\n"), strdate(dprinc.mod_date),
               modprincstr);
        printf(_("Last successful authentication: %s\n"),
               dprinc.last_success ? strdate(dprinc.last_success) :
               _("[never]"));
        printf("Last failed authentication: %s\n",
               dprinc.last_failed ? strdate(dprinc.last_failed) :
               "[never]");
        printf(_("Failed password attempts: %d\n"),
               dprinc.fail_auth_count);
        printf(_("Number of keys: %d\n"), dprinc.n_key_data);
        for (i = 0; i < dprinc.n_key_data; i++) {
            krb5_key_data *key_data = &dprinc.key_data[i];
            char enctype[BUFSIZ], salttype[BUFSIZ];
            char *deprecated = "";

            if (krb5_enctype_to_name(key_data->key_data_type[0], FALSE,
                                     enctype, sizeof(enctype)))
                snprintf(enctype, sizeof(enctype), _("<Encryption type 0x%x>"),
                         key_data->key_data_type[0]);
            if (!krb5_c_valid_enctype(key_data->key_data_type[0]))
                deprecated = "UNSUPPORTED:";
            else if (krb5int_c_deprecated_enctype(key_data->key_data_type[0]))
                deprecated = "DEPRECATED:";
            printf("Key: vno %d, %s%s", key_data->key_data_kvno, deprecated,
                   enctype);
            if (key_data->key_data_ver > 1 &&
                key_data->key_data_type[1] != KRB5_KDB_SALTTYPE_NORMAL) {
                if (krb5_salttype_to_string(key_data->key_data_type[1],
                                            salttype, sizeof(salttype)))
                    snprintf(salttype, sizeof(salttype), _("<Salt type 0x%x>"),
                             key_data->key_data_type[1]);
                printf(":%s", salttype);
            }
            printf("\n");
        }
        printf(_("MKey: vno %d\n"), dprinc.mkvno);

        printf(_("Attributes:"));
        retval = krb5_flags_to_strings(dprinc.attributes, &attrstrs);
        if (retval) {
            com_err("get_principal", retval, _("while printing flags"));
            return;
        }
        for (sp = attrstrs; sp != NULL && *sp != NULL; sp++) {
            printf(" %s", *sp);
            free(*sp);
        }
        free(attrstrs);
        printf("\n");
        polname = (dprinc.policy != NULL) ? dprinc.policy : _("[none]");
        noexist = (dprinc.policy != NULL && !policy_exists(dprinc.policy)) ?
            _(" [does not exist]") : "";
        printf(_("Policy: %s%s\n"), polname, noexist);
    } else {
        printf("\"%s\"\t%d\t%d\t%d\t%d\t\"%s\"\t%d\t%d\t%d\t%d\t\"%s\""
               "\t%d\t%d\t%d\t%d\t%d",
               princstr, dprinc.princ_expire_time, dprinc.last_pwd_change,
               dprinc.pw_expiration, dprinc.max_life, modprincstr,
               dprinc.mod_date, dprinc.attributes, dprinc.kvno,
               dprinc.mkvno, dprinc.policy ? dprinc.policy : "[none]",
               dprinc.max_renewable_life, dprinc.last_success,
               dprinc.last_failed, dprinc.fail_auth_count,
               dprinc.n_key_data);
        for (i = 0; i < dprinc.n_key_data; i++)
            printf("\t%d\t%d\t%d\t%d",
                   dprinc.key_data[i].key_data_ver,
                   dprinc.key_data[i].key_data_kvno,
                   dprinc.key_data[i].key_data_type[0],
                   dprinc.key_data[i].key_data_type[1]);
        printf("\n");
    }
cleanup:
    krb5_free_principal(context, princ);
    kadm5_free_principal_ent(handle, &dprinc);
    free(canon);
    free(princstr);
    free(modprincstr);
}

void
kadmin_getprincs(int argc, char *argv[])
{
    krb5_error_code retval;
    char *expr, **names;
    int i, count;

    expr = NULL;
    if (!(argc == 1 || (argc == 2 && (expr = argv[1])))) {
        error(_("usage: get_principals [expression]\n"));
        return;
    }
    retval = kadm5_get_principals(handle, expr, &names, &count);
    if (retval) {
        com_err("get_principals", retval, _("while retrieving list."));
        return;
    }
    for (i = 0; i < count; i++)
        printf("%s\n", names[i]);
    kadm5_free_name_list(handle, names, count);
}

static int
kadmin_parse_policy_args(int argc, char *argv[], kadm5_policy_ent_t policy,
                         long *mask, char *caller)
{
    krb5_error_code retval;
    int i;
    time_t now, interval;

    time(&now);
    *mask = 0;
    for (i = 1; i < argc - 1; i++) {
        if (!strcmp(argv[i], "-maxlife")) {
            if (++i > argc -2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            policy->pw_max_life = interval;
            *mask |= KADM5_PW_MAX_LIFE;
            continue;
        } else if (!strcmp(argv[i], "-minlife")) {
            if (++i > argc - 2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            policy->pw_min_life = interval;
            *mask |= KADM5_PW_MIN_LIFE;
            continue;
        } else if (!strcmp(argv[i], "-minlength")) {
            if (++i > argc - 2)
                return -1;
            policy->pw_min_length = atoi(argv[i]);
            *mask |= KADM5_PW_MIN_LENGTH;
            continue;
        } else if (!strcmp(argv[i], "-minclasses")) {
            if (++i > argc - 2)
                return -1;
            policy->pw_min_classes = atoi(argv[i]);
            *mask |= KADM5_PW_MIN_CLASSES;
            continue;
        } else if (!strcmp(argv[i], "-history")) {
            if (++i > argc - 2)
                return -1;
            policy->pw_history_num = atoi(argv[i]);
            *mask |= KADM5_PW_HISTORY_NUM;
            continue;
        } else if (strlen(argv[i]) == 11 &&
                   !strcmp(argv[i], "-maxfailure")) {
            if (++i > argc - 2)
                return -1;
            policy->pw_max_fail = atoi(argv[i]);
            *mask |= KADM5_PW_MAX_FAILURE;
            continue;
        } else if (strlen(argv[i]) == 21 &&
                   !strcmp(argv[i], "-failurecountinterval")) {
            if (++i > argc - 2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            policy->pw_failcnt_interval = interval;
            *mask |= KADM5_PW_FAILURE_COUNT_INTERVAL;
            continue;
        } else if (strlen(argv[i]) == 16 &&
                   !strcmp(argv[i], "-lockoutduration")) {
            if (++i > argc - 2)
                return -1;
            interval = parse_interval(argv[i], now);
            if (interval == (time_t)-1)
                return -1;
            policy->pw_lockout_duration = interval;
            *mask |= KADM5_PW_LOCKOUT_DURATION;
            continue;
        } else if (!strcmp(argv[i], "-allowedkeysalts")) {
            krb5_key_salt_tuple *ks_tuple = NULL;
            int n_ks_tuple = 0;

            if (++i > argc - 2)
                return -1;
            if (strcmp(argv[i], "-")) {
                retval = krb5_string_to_keysalts(argv[i], ",", NULL, 0,
                                                 &ks_tuple, &n_ks_tuple);
                if (retval) {
                    com_err(caller, retval, _("while parsing keysalts %s"),
                            argv[i]);
                    return -1;
                }
                free(ks_tuple);
                policy->allowed_keysalts = argv[i];
            }
            *mask |= KADM5_POLICY_ALLOWED_KEYSALTS;
            continue;
        } else
            return -1;
    }
    if (i != argc -1) {
        error(_("%s: parser lost count!\n"), caller);
        return -1;
    } else
        return 0;
}

static void
kadmin_addmodpol_usage(char *func)
{
    error(_("usage; %s [options] policy\n"), func);
    error(_("\toptions are:\n"));
    error(_("\t\t[-maxlife time] [-minlife time] [-minlength length]\n"
            "\t\t[-minclasses number] [-history number]\n"
            "\t\t[-maxfailure number] [-failurecountinterval time]\n"
            "\t\t[-allowedkeysalts keysalts]\n"));
    error(_("\t\t[-lockoutduration time]\n"));
}

void
kadmin_addpol(int argc, char *argv[])
{
    krb5_error_code retval;
    long mask;
    kadm5_policy_ent_rec policy;

    memset(&policy, 0, sizeof(policy));
    if (kadmin_parse_policy_args(argc, argv, &policy, &mask, "add_policy")) {
        kadmin_addmodpol_usage("add_policy");
        return;
    }
    policy.policy = argv[argc - 1];
    mask |= KADM5_POLICY;
    retval = kadm5_create_policy(handle, &policy, mask);
    if (retval) {
        com_err("add_policy", retval, _("while creating policy \"%s\"."),
                policy.policy);
    }
}

void
kadmin_modpol(int argc, char *argv[])
{
    krb5_error_code retval;
    long mask;
    kadm5_policy_ent_rec policy;

    memset(&policy, 0, sizeof(policy));
    if (kadmin_parse_policy_args(argc, argv, &policy, &mask,
                                 "modify_policy")) {
        kadmin_addmodpol_usage("modify_policy");
        return;
    }
    policy.policy = argv[argc - 1];
    retval = kadm5_modify_policy(handle, &policy, mask);
    if (retval) {
        com_err("modify_policy", retval, _("while modifying policy \"%s\"."),
                policy.policy);
    }
}

void
kadmin_delpol(int argc, char *argv[])
{
    krb5_error_code retval;
    char reply[5];

    if (!(argc == 2 || (argc == 3 && !strcmp("-force", argv[1])))) {
        error(_("usage: delete_policy [-force] policy\n"));
        return;
    }
    if (argc == 2 && !script_mode) {
        printf(_("Are you sure you want to delete the policy \"%s\"? "
                 "(yes/no): "), argv[1]);
        fgets(reply, sizeof(reply), stdin);
        if (strcmp("yes\n", reply)) {
            fprintf(stderr, _("Policy \"%s\" not deleted.\n"), argv[1]);
            return;
        }
    }
    retval = kadm5_delete_policy(handle, argv[argc - 1]);
    if (retval) {
        com_err("delete_policy:", retval, _("while deleting policy \"%s\""),
                argv[argc - 1]);
    }
}

void
kadmin_getpol(int argc, char *argv[])
{
    krb5_error_code retval;
    kadm5_policy_ent_rec policy;

    if (!(argc == 2 || (argc == 3 && !strcmp("-terse", argv[1])))) {
        error(_("usage: get_policy [-terse] policy\n"));
        return;
    }
    retval = kadm5_get_policy(handle, argv[argc - 1], &policy);
    if (retval) {
        com_err("get_policy", retval, _("while retrieving policy \"%s\"."),
                argv[argc - 1]);
        return;
    }
    if (argc == 2) {
        printf(_("Policy: %s\n"), policy.policy);
        printf(_("Maximum password life: %s\n"), strdur(policy.pw_max_life));
        printf(_("Minimum password life: %s\n"), strdur(policy.pw_min_life));
        printf(_("Minimum password length: %ld\n"), policy.pw_min_length);
        printf(_("Minimum number of password character classes: %ld\n"),
               policy.pw_min_classes);
        printf(_("Number of old keys kept: %ld\n"), policy.pw_history_num);
        printf(_("Maximum password failures before lockout: %lu\n"),
               (unsigned long)policy.pw_max_fail);
        printf(_("Password failure count reset interval: %s\n"),
               strdur(policy.pw_failcnt_interval));
        printf(_("Password lockout duration: %s\n"),
               strdur(policy.pw_lockout_duration));
        if (policy.allowed_keysalts != NULL)
            printf(_("Allowed key/salt types: %s\n"), policy.allowed_keysalts);
    } else {
        /* Output 0 where we used to output policy_refcnt. */
        printf("\"%s\"\t%ld\t%ld\t%ld\t%ld\t%ld\t0\t%lu\t%ld\t%ld\t%s\n",
               policy.policy, policy.pw_max_life, policy.pw_min_life,
               policy.pw_min_length, policy.pw_min_classes,
               policy.pw_history_num, (unsigned long)policy.pw_max_fail,
               (long)policy.pw_failcnt_interval,
               (long)policy.pw_lockout_duration,
               (policy.allowed_keysalts == NULL) ? "-" :
               policy.allowed_keysalts);
    }
    kadm5_free_policy_ent(handle, &policy);
}

void
kadmin_getpols(int argc, char *argv[])
{
    krb5_error_code retval;
    char *expr, **names;
    int i, count;

    expr = NULL;
    if (!(argc == 1 || (argc == 2 && (expr = argv[1])))) {
        error(_("usage: get_policies [expression]\n"));
        return;
    }
    retval = kadm5_get_policies(handle, expr, &names, &count);
    if (retval) {
        com_err("get_policies", retval, _("while retrieving list."));
        return;
    }
    for (i = 0; i < count; i++)
        printf("%s\n", names[i]);
    kadm5_free_name_list(handle, names, count);
}

void
kadmin_getprivs(int argc, char *argv[])
{
    static char *privs[] = {"INQUIRE", "ADD", "MODIFY", "DELETE"};
    krb5_error_code retval;
    size_t i;
    long plist;

    if (argc != 1) {
        error(_("usage: get_privs\n"));
        return;
    }
    retval = kadm5_get_privs(handle, &plist);
    if (retval) {
        com_err("get_privs", retval, _("while retrieving privileges"));
        return;
    }
    printf(_("current privileges:"));
    for (i = 0; i < sizeof (privs) / sizeof (char *); i++) {
        if (plist & 1 << i)
            printf(" %s", privs[i]);
    }
    printf("\n");
}

void
kadmin_purgekeys(int argc, char *argv[])
{
    kadm5_ret_t retval;
    int keepkvno = -1;
    char *pname = NULL, *canon = NULL;
    krb5_principal princ;

    if (argc == 4 && strcmp(argv[1], "-keepkvno") == 0) {
        keepkvno = atoi(argv[2]);
        pname = argv[3];
    } else if (argc == 3 && strcmp(argv[1], "-all") == 0) {
        keepkvno = KRB5_INT32_MAX;
        pname = argv[2];
    } else if (argc == 2) {
        pname = argv[1];
    }
    if (pname == NULL) {
        error(_("usage: purgekeys [-all|-keepkvno oldest_kvno_to_keep] "
                "principal\n"));
        return;
    }

    retval = kadmin_parse_name(pname, &princ);
    if (retval) {
        com_err("purgekeys", retval, _("while parsing principal"));
        return;
    }

    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("purgekeys", retval, _("while canonicalizing principal"));
        goto cleanup;
    }

    retval = kadm5_purgekeys(handle, princ, keepkvno);
    if (retval) {
        com_err("purgekeys", retval,
                _("while purging keys for principal \"%s\""), canon);
        goto cleanup;
    }

    if (keepkvno == KRB5_INT32_MAX)
        info(_("All keys for principal \"%s\" removed.\n"), canon);
    else
        info(_("Old keys for principal \"%s\" purged.\n"), canon);
cleanup:
    krb5_free_principal(context, princ);
    free(canon);
    return;
}

void
kadmin_getstrings(int argc, char *argv[])
{
    kadm5_ret_t retval;
    char *pname, *canon = NULL;
    krb5_principal princ = NULL;
    krb5_string_attr *strings = NULL;
    int count, i;

    if (argc != 2) {
        error(_("usage: get_strings principal\n"));
        return;
    }
    pname = argv[1];

    retval = kadmin_parse_name(pname, &princ);
    if (retval) {
        com_err("get_strings", retval, _("while parsing principal"));
        return;
    }

    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("get_strings", retval, _("while canonicalizing principal"));
        goto cleanup;
    }

    retval = kadm5_get_strings(handle, princ, &strings, &count);
    if (retval) {
        com_err("get_strings", retval,
                _("while getting attributes for principal \"%s\""), canon);
        goto cleanup;
    }

    if (count == 0)
        printf(_("(No string attributes.)\n"));
    for (i = 0; i < count; i++)
        printf("%s: %s\n", strings[i].key, strings[i].value);
    kadm5_free_strings(handle, strings, count);

cleanup:
    krb5_free_principal(context, princ);
    free(canon);
    return;
}

void
kadmin_setstring(int argc, char *argv[])
{
    kadm5_ret_t retval;
    char *pname, *canon = NULL, *key, *value;
    krb5_principal princ = NULL;

    if (argc != 4) {
        error(_("usage: set_string principal key value\n"));
        return;
    }
    pname = argv[1];
    key = argv[2];
    value = argv[3];

    retval = kadmin_parse_name(pname, &princ);
    if (retval) {
        com_err("set_string", retval, _("while parsing principal"));
        return;
    }

    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("set_string", retval, _("while canonicalizing principal"));
        goto cleanup;
    }

    retval = kadm5_set_string(handle, princ, key, value);
    if (retval) {
        com_err("set_string", retval,
                _("while setting attribute on principal \"%s\""), canon);
        goto cleanup;
    }

    info(_("Attribute set for principal \"%s\".\n"), canon);
cleanup:
    krb5_free_principal(context, princ);
    free(canon);
    return;
}

void
kadmin_delstring(int argc, char *argv[])
{
    kadm5_ret_t retval;
    char *pname, *canon = NULL, *key;
    krb5_principal princ = NULL;

    if (argc != 3) {
        error(_("usage: del_string principal key\n"));
        return;
    }
    pname = argv[1];
    key = argv[2];

    retval = kadmin_parse_name(pname, &princ);
    if (retval) {
        com_err("delstring", retval, _("while parsing principal"));
        return;
    }

    retval = krb5_unparse_name(context, princ, &canon);
    if (retval) {
        com_err("del_string", retval, _("while canonicalizing principal"));
        goto cleanup;
    }

    retval = kadm5_set_string(handle, princ, key, NULL);
    if (retval) {
        com_err("del_string", retval,
                _("while deleting attribute from principal \"%s\""), canon);
        goto cleanup;
    }

    info(_("Attribute removed from principal \"%s\".\n"), canon);
cleanup:
    krb5_free_principal(context, princ);
    free(canon);
    return;
}