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|
/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved.
*
* $Id$
* $Source$
*/
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* 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 FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "k5-int.h"
#include <kadm5/admin.h>
#include <adm_proto.h>
#include "kadmin.h"
static void add_principal(void *lhandle, char *keytab_str, krb5_keytab keytab,
krb5_boolean keepold,
int n_ks_tuple, krb5_key_salt_tuple *ks_tuple,
char *princ_str);
static void remove_principal(char *keytab_str, krb5_keytab keytab,
char *princ_str, char *kvno_str);
static char *etype_string(krb5_enctype enctype);
static int quiet;
static int norandkey;
static void
add_usage(void)
{
fprintf(stderr, _("Usage: ktadd [-k[eytab] keytab] [-q] [-e keysaltlist] "
"[-norandkey] [principal | -glob princ-exp] [...]\n"));
}
static void
rem_usage(void)
{
fprintf(stderr, _("Usage: ktremove [-k[eytab] keytab] [-q] principal "
"[kvno|\"all\"|\"old\"]\n"));
}
static int
process_keytab(krb5_context my_context, char **keytab_str,
krb5_keytab *keytab)
{
int code;
char *name = *keytab_str;
if (name == NULL) {
name = malloc(BUFSIZ);
if (!name) {
com_err(whoami, ENOMEM, _("while creating keytab name"));
return 1;
}
code = krb5_kt_default(my_context, keytab);
if (code != 0) {
com_err(whoami, code, _("while opening default keytab"));
free(name);
return 1;
}
code = krb5_kt_get_name(my_context, *keytab, name, BUFSIZ);
if (code != 0) {
com_err(whoami, code, _("while getting keytab name"));
free(name);
return 1;
}
} else {
if (strchr(name, ':') != NULL)
name = strdup(name);
else if (asprintf(&name, "WRFILE:%s", name) < 0)
name = NULL;
if (name == NULL) {
com_err(whoami, ENOMEM, _("while creating keytab name"));
return 1;
}
code = krb5_kt_resolve(my_context, name, keytab);
if (code != 0) {
com_err(whoami, code, _("while resolving keytab %s"), name);
free(name);
return 1;
}
}
*keytab_str = name;
return 0;
}
void
kadmin_keytab_add(int argc, char **argv)
{
krb5_keytab keytab = 0;
char *keytab_str = NULL, **princs;
int code, num, i;
krb5_error_code retval;
int n_ks_tuple = 0;
krb5_boolean keepold = FALSE;
krb5_key_salt_tuple *ks_tuple = NULL;
argc--; argv++;
quiet = 0;
norandkey = 0;
while (argc) {
if (strncmp(*argv, "-k", 2) == 0) {
argc--; argv++;
if (!argc || keytab_str) {
add_usage();
return;
}
keytab_str = *argv;
} else if (strcmp(*argv, "-q") == 0) {
quiet++;
} else if (strcmp(*argv, "-norandkey") == 0) {
norandkey++;
} else if (strcmp(*argv, "-e") == 0) {
argc--;
if (argc < 1) {
add_usage();
return;
}
retval = krb5_string_to_keysalts(*++argv, NULL, NULL, 0,
&ks_tuple, &n_ks_tuple);
if (retval) {
com_err("ktadd", retval, _("while parsing keysalts %s"),
*argv);
return;
}
} else
break;
argc--; argv++;
}
if (argc == 0) {
add_usage();
return;
}
if (norandkey && ks_tuple) {
fprintf(stderr,
_("cannot specify keysaltlist when not changing key\n"));
return;
}
if (process_keytab(context, &keytab_str, &keytab))
return;
while (*argv) {
if (strcmp(*argv, "-glob") == 0) {
if (*++argv == NULL) {
add_usage();
break;
}
code = kadm5_get_principals(handle, *argv, &princs, &num);
if (code) {
com_err(whoami, code, _("while expanding expression \"%s\"."),
*argv);
argv++;
continue;
}
for (i = 0; i < num; i++)
add_principal(handle, keytab_str, keytab, keepold,
n_ks_tuple, ks_tuple, princs[i]);
kadm5_free_name_list(handle, princs, num);
} else {
add_principal(handle, keytab_str, keytab, keepold,
n_ks_tuple, ks_tuple, *argv);
argv++;
}
}
code = krb5_kt_close(context, keytab);
if (code != 0)
com_err(whoami, code, _("while closing keytab"));
free(keytab_str);
}
void
kadmin_keytab_remove(int argc, char **argv)
{
krb5_keytab keytab = 0;
char *keytab_str = NULL;
int code;
argc--; argv++;
quiet = 0;
while (argc) {
if (strncmp(*argv, "-k", 2) == 0) {
argc--; argv++;
if (!argc || keytab_str) {
rem_usage();
return;
}
keytab_str = *argv;
} else if (strcmp(*argv, "-q") == 0) {
quiet++;
} else
break;
argc--; argv++;
}
if (argc != 1 && argc != 2) {
rem_usage();
return;
}
if (process_keytab(context, &keytab_str, &keytab))
return;
remove_principal(keytab_str, keytab, argv[0], argv[1]);
code = krb5_kt_close(context, keytab);
if (code != 0)
com_err(whoami, code, _("while closing keytab"));
free(keytab_str);
}
/* Generate new random keys for princ, and convert them into a kadm5_key_data
* array (with no salt information). */
static krb5_error_code
fetch_new_keys(void *lhandle, krb5_principal princ, krb5_boolean keepold,
int n_ks_tuple, krb5_key_salt_tuple *ks_tuple,
kadm5_key_data **key_data_out, int *nkeys_out)
{
krb5_error_code code;
kadm5_key_data *key_data;
kadm5_principal_ent_rec princ_rec;
krb5_keyblock *keys = NULL;
int i, nkeys = 0;
*key_data_out = NULL;
*nkeys_out = 0;
memset(&princ_rec, 0, sizeof(princ_rec));
/* Generate new random keys. */
code = randkey_princ(lhandle, princ, keepold, n_ks_tuple, ks_tuple,
&keys, &nkeys);
if (code)
goto cleanup;
/* Get the principal entry to find the kvno of the new keys. (This is not
* atomic, but randkey doesn't report the new kvno.) */
code = kadm5_get_principal(lhandle, princ, &princ_rec,
KADM5_PRINCIPAL_NORMAL_MASK);
if (code)
goto cleanup;
key_data = k5calloc(nkeys, sizeof(*key_data), &code);
if (key_data == NULL)
goto cleanup;
/* Transfer the keyblocks and free the container array. */
for (i = 0; i < nkeys; i++) {
key_data[i].key = keys[i];
key_data[i].kvno = princ_rec.kvno;
}
*key_data_out = key_data;
*nkeys_out = nkeys;
free(keys);
keys = NULL;
nkeys = 0;
cleanup:
for (i = 0; i < nkeys; i++)
krb5_free_keyblock_contents(context, &keys[i]);
free(keys);
kadm5_free_principal_ent(lhandle, &princ_rec);
return code;
}
static void
add_principal(void *lhandle, char *keytab_str, krb5_keytab keytab,
krb5_boolean keepold, int n_ks_tuple,
krb5_key_salt_tuple *ks_tuple, char *princ_str)
{
krb5_principal princ = NULL;
krb5_keytab_entry new_entry;
kadm5_key_data *key_data;
int code, nkeys, i;
princ = NULL;
key_data = NULL;
nkeys = 0;
code = krb5_parse_name(context, princ_str, &princ);
if (code != 0) {
com_err(whoami, code, _("while parsing -add principal name %s"),
princ_str);
goto cleanup;
}
if (norandkey) {
code = kadm5_get_principal_keys(handle, princ, 0, &key_data, &nkeys);
} else {
code = fetch_new_keys(handle, princ, keepold, n_ks_tuple, ks_tuple,
&key_data, &nkeys);
}
if (code != 0) {
if (code == KADM5_UNK_PRINC) {
fprintf(stderr, _("%s: Principal %s does not exist.\n"),
whoami, princ_str);
} else
com_err(whoami, code, _("while changing %s's key"), princ_str);
goto cleanup;
}
for (i = 0; i < nkeys; i++) {
memset(&new_entry, 0, sizeof(new_entry));
new_entry.principal = princ;
new_entry.key = key_data[i].key;
new_entry.vno = key_data[i].kvno;
code = krb5_kt_add_entry(context, keytab, &new_entry);
if (code != 0) {
com_err(whoami, code, _("while adding key to keytab"));
goto cleanup;
}
if (!quiet) {
printf(_("Entry for principal %s with kvno %d, "
"encryption type %s added to keytab %s.\n"),
princ_str, key_data[i].kvno,
etype_string(key_data[i].key.enctype), keytab_str);
}
}
cleanup:
kadm5_free_kadm5_key_data(context, nkeys, key_data);
krb5_free_principal(context, princ);
}
static void
remove_principal(char *keytab_str, krb5_keytab keytab,
char *princ_str, char *kvno_str)
{
krb5_principal princ = NULL;
krb5_keytab_entry entry;
krb5_kt_cursor cursor = NULL;
enum { UNDEF, SPEC, HIGH, ALL, OLD } mode;
int code, did_something;
krb5_kvno kvno;
code = krb5_parse_name(context, princ_str, &princ);
if (code != 0) {
com_err(whoami, code, _("while parsing principal name %s"), princ_str);
goto cleanup;
}
mode = UNDEF;
if (kvno_str == NULL) {
mode = HIGH;
kvno = 0;
} else if (strcmp(kvno_str, "all") == 0) {
mode = ALL;
kvno = 0;
} else if (strcmp(kvno_str, "old") == 0) {
mode = OLD;
kvno = 0;
} else {
mode = SPEC;
kvno = atoi(kvno_str);
}
/* kvno is set to specified value for SPEC, 0 otherwise */
code = krb5_kt_get_entry(context, keytab, princ, kvno, 0, &entry);
if (code != 0) {
if (code == ENOENT) {
fprintf(stderr, _("%s: Keytab %s does not exist.\n"),
whoami, keytab_str);
} else if (code == KRB5_KT_NOTFOUND) {
if (mode != SPEC) {
fprintf(stderr, _("%s: No entry for principal %s exists in "
"keytab %s\n"),
whoami, princ_str, keytab_str);
} else {
fprintf(stderr, _("%s: No entry for principal %s with kvno %d "
"exists in keytab %s\n"),
whoami, princ_str, kvno, keytab_str);
}
} else {
com_err(whoami, code,
_("while retrieving highest kvno from keytab"));
}
goto cleanup;
}
/* set kvno to spec'ed value for SPEC, highest kvno otherwise */
if (mode != SPEC)
kvno = entry.vno;
krb5_kt_free_entry(context, &entry);
code = krb5_kt_start_seq_get(context, keytab, &cursor);
if (code != 0) {
com_err(whoami, code, _("while starting keytab scan"));
goto cleanup;
}
did_something = 0;
while ((code = krb5_kt_next_entry(context, keytab, &entry,
&cursor)) == 0) {
if (krb5_principal_compare(context, princ, entry.principal) &&
((mode == ALL) ||
(mode == SPEC && entry.vno == kvno) ||
(mode == OLD && entry.vno != kvno) ||
(mode == HIGH && entry.vno == kvno))) {
/*
* Ack! What a kludge... the scanning functions lock
* the keytab so entries cannot be removed while they
* are operating.
*/
code = krb5_kt_end_seq_get(context, keytab, &cursor);
if (code != 0) {
com_err(whoami, code,
_("while temporarily ending keytab scan"));
goto cleanup;
}
cursor = NULL;
code = krb5_kt_remove_entry(context, keytab, &entry);
if (code != 0) {
com_err(whoami, code, _("while deleting entry from keytab"));
goto cleanup;
}
code = krb5_kt_start_seq_get(context, keytab, &cursor);
if (code != 0) {
com_err(whoami, code, _("while restarting keytab scan"));
goto cleanup;
}
did_something++;
if (!quiet) {
printf(_("Entry for principal %s with kvno %d removed from "
"keytab %s.\n"), princ_str, entry.vno, keytab_str);
}
}
krb5_kt_free_entry(context, &entry);
}
if (code && code != KRB5_KT_END) {
com_err(whoami, code, _("while scanning keytab"));
goto cleanup;
}
code = krb5_kt_end_seq_get(context, keytab, &cursor);
if (code) {
com_err(whoami, code, _("while ending keytab scan"));
goto cleanup;
}
cursor = NULL;
/*
* If !did_someting then mode must be OLD or we would have
* already returned with an error. But check it anyway just to
* prevent unexpected error messages...
*/
if (!did_something && mode == OLD) {
fprintf(stderr, _("%s: There is only one entry for principal %s in "
"keytab %s\n"), whoami, princ_str, keytab_str);
}
cleanup:
if (cursor != NULL)
(void)krb5_kt_end_seq_get(context, keytab, &cursor);
krb5_free_principal(context, princ);
}
/*
* etype_string(enctype): return a string representation of the
* encryption type. XXX copied from klist.c; this should be a
* library function, or perhaps just #defines
*/
static char *
etype_string(krb5_enctype enctype)
{
static char buf[100];
krb5_error_code ret;
ret = krb5_enctype_to_name(enctype, FALSE, buf, sizeof(buf));
if (ret)
snprintf(buf, sizeof(buf), "etype %d", enctype);
return buf;
}
|