several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
/*
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* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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/* memory operations -------------------------------------------- */
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struct mkt_data {
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krb5_keytab_entry *entries;
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int num_entries;
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char *name;
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int refcount;
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struct mkt_data *next;
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};
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/* this mutex protects mkt_head, ->refcount, and ->next
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* content is not protected (name is static and need no protection)
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*/
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static HEIMDAL_MUTEX mkt_mutex = HEIMDAL_MUTEX_INITIALIZER;
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static struct mkt_data *mkt_head;
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static krb5_error_code KRB5_CALLCONV
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mkt_resolve(krb5_context context, const char *name, krb5_keytab id)
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{
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struct mkt_data *d;
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HEIMDAL_MUTEX_lock(&mkt_mutex);
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for (d = mkt_head; d != NULL; d = d->next)
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if (strcmp(d->name, name) == 0)
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break;
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if (d) {
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if (d->refcount < 1)
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krb5_abortx(context, "Double close on memory keytab, "
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"refcount < 1 %d", d->refcount);
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d->refcount++;
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id->data = d;
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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return 0;
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}
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d = calloc(1, sizeof(*d));
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if(d == NULL) {
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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d->name = strdup(name);
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if (d->name == NULL) {
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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free(d);
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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d->entries = NULL;
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d->num_entries = 0;
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d->refcount = 1;
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d->next = mkt_head;
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mkt_head = d;
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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id->data = d;
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_close(krb5_context context, krb5_keytab id)
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{
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struct mkt_data *d = id->data, **dp;
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int i;
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HEIMDAL_MUTEX_lock(&mkt_mutex);
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if (d->refcount < 1)
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krb5_abortx(context,
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"krb5 internal error, memory keytab refcount < 1 on close");
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if (--d->refcount > 0) {
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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return 0;
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}
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for (dp = &mkt_head; *dp != NULL; dp = &(*dp)->next) {
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if (*dp == d) {
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*dp = d->next;
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break;
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}
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}
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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free(d->name);
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for(i = 0; i < d->num_entries; i++)
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krb5_kt_free_entry(context, &d->entries[i]);
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free(d->entries);
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free(d);
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_get_name(krb5_context context,
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krb5_keytab id,
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char *name,
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size_t namesize)
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{
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struct mkt_data *d = id->data;
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strlcpy(name, d->name, namesize);
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_start_seq_get(krb5_context context,
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krb5_keytab id,
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krb5_kt_cursor *c)
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{
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/* XXX */
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c->fd = 0;
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_next_entry(krb5_context context,
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krb5_keytab id,
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krb5_keytab_entry *entry,
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krb5_kt_cursor *c)
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{
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struct mkt_data *d = id->data;
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if(c->fd >= d->num_entries)
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return KRB5_KT_END;
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return krb5_kt_copy_entry_contents(context, &d->entries[c->fd++], entry);
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_end_seq_get(krb5_context context,
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krb5_keytab id,
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krb5_kt_cursor *cursor)
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{
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return 0;
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_add_entry(krb5_context context,
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krb5_keytab id,
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krb5_keytab_entry *entry)
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{
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struct mkt_data *d = id->data;
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krb5_keytab_entry *tmp;
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tmp = realloc(d->entries, (d->num_entries + 1) * sizeof(*d->entries));
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if(tmp == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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d->entries = tmp;
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return krb5_kt_copy_entry_contents(context, entry,
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&d->entries[d->num_entries++]);
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}
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static krb5_error_code KRB5_CALLCONV
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mkt_remove_entry(krb5_context context,
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krb5_keytab id,
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krb5_keytab_entry *entry)
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{
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struct mkt_data *d = id->data;
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krb5_keytab_entry *e, *end;
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int found = 0;
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if (d->num_entries == 0) {
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krb5_clear_error_message(context);
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return KRB5_KT_NOTFOUND;
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}
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/* do this backwards to minimize copying */
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for(end = d->entries + d->num_entries, e = end - 1; e >= d->entries; e--) {
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if(krb5_kt_compare(context, e, entry->principal,
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entry->vno, entry->keyblock.keytype)) {
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krb5_kt_free_entry(context, e);
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memmove(e, e + 1, (end - e - 1) * sizeof(*e));
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memset(end - 1, 0, sizeof(*end));
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d->num_entries--;
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end--;
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found = 1;
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}
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}
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if (!found) {
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krb5_clear_error_message (context);
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return KRB5_KT_NOTFOUND;
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}
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e = realloc(d->entries, d->num_entries * sizeof(*d->entries));
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if(e != NULL || d->num_entries == 0)
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d->entries = e;
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return 0;
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}
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const krb5_kt_ops krb5_mkt_ops = {
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"MEMORY",
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mkt_resolve,
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mkt_get_name,
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mkt_close,
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NULL, /* destroy */
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NULL, /* get */
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mkt_start_seq_get,
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mkt_next_entry,
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mkt_end_seq_get,
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mkt_add_entry,
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mkt_remove_entry
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};
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