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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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* 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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* 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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* 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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* 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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* 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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#include "krb5_locl.h"
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/* memory operations -------------------------------------------- */
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krb5_keytab_entry *entries;
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struct mkt_data *next;
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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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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
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mkt_resolve(krb5_context context, const char *name, krb5_keytab id)
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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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krb5_abortx(context, "Double close on memory keytab, "
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"refcount < 1 %d", d->refcount);
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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d = calloc(1, sizeof(*d));
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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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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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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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static krb5_error_code
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mkt_close(krb5_context context, krb5_keytab id)
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struct mkt_data *d = id->data, **dp;
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HEIMDAL_MUTEX_lock(&mkt_mutex);
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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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for (dp = &mkt_head; *dp != NULL; dp = &(*dp)->next) {
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HEIMDAL_MUTEX_unlock(&mkt_mutex);
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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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static krb5_error_code
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mkt_get_name(krb5_context context,
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struct mkt_data *d = id->data;
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strlcpy(name, d->name, namesize);
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static krb5_error_code
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mkt_start_seq_get(krb5_context context,
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static krb5_error_code
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mkt_next_entry(krb5_context context,
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krb5_keytab_entry *entry,
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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_copy_entry_contents(context, &d->entries[c->fd++], entry);
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static krb5_error_code
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mkt_end_seq_get(krb5_context context,
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krb5_kt_cursor *cursor)
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static krb5_error_code
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mkt_add_entry(krb5_context context,
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krb5_keytab_entry *entry)
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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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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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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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static krb5_error_code
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mkt_remove_entry(krb5_context context,
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krb5_keytab_entry *entry)
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struct mkt_data *d = id->data;
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krb5_keytab_entry *e, *end;
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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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/* 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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krb5_clear_error_message (context);
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return KRB5_KT_NOTFOUND;
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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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const krb5_kt_ops krb5_mkt_ops = {