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/*
* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: keytab_memory.c,v 1.6 2005/05/18 04:44:40 lha Exp $");
/* memory operations -------------------------------------------- */
struct mkt_data {
krb5_keytab_entry *entries;
int num_entries;
};
static krb5_error_code
mkt_resolve(krb5_context context, const char *name, krb5_keytab id)
{
struct mkt_data *d;
d = malloc(sizeof(*d));
if(d == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
d->entries = NULL;
d->num_entries = 0;
id->data = d;
return 0;
}
static krb5_error_code
mkt_close(krb5_context context, krb5_keytab id)
{
struct mkt_data *d = id->data;
int i;
for(i = 0; i < d->num_entries; i++)
krb5_kt_free_entry(context, &d->entries[i]);
free(d->entries);
free(d);
return 0;
}
static krb5_error_code
mkt_get_name(krb5_context context,
krb5_keytab id,
char *name,
size_t namesize)
{
strlcpy(name, "", namesize);
return 0;
}
static krb5_error_code
mkt_start_seq_get(krb5_context context,
krb5_keytab id,
krb5_kt_cursor *c)
{
/* XXX */
c->fd = 0;
return 0;
}
static krb5_error_code
mkt_next_entry(krb5_context context,
krb5_keytab id,
krb5_keytab_entry *entry,
krb5_kt_cursor *c)
{
struct mkt_data *d = id->data;
if(c->fd >= d->num_entries)
return KRB5_KT_END;
return krb5_kt_copy_entry_contents(context, &d->entries[c->fd++], entry);
}
static krb5_error_code
mkt_end_seq_get(krb5_context context,
krb5_keytab id,
krb5_kt_cursor *cursor)
{
return 0;
}
static krb5_error_code
mkt_add_entry(krb5_context context,
krb5_keytab id,
krb5_keytab_entry *entry)
{
struct mkt_data *d = id->data;
krb5_keytab_entry *tmp;
tmp = realloc(d->entries, (d->num_entries + 1) * sizeof(*d->entries));
if(tmp == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return ENOMEM;
}
d->entries = tmp;
return krb5_kt_copy_entry_contents(context, entry,
&d->entries[d->num_entries++]);
}
static krb5_error_code
mkt_remove_entry(krb5_context context,
krb5_keytab id,
krb5_keytab_entry *entry)
{
struct mkt_data *d = id->data;
krb5_keytab_entry *e, *end;
int found = 0;
if (d->num_entries == 0) {
krb5_clear_error_string(context);
return KRB5_KT_NOTFOUND;
}
/* do this backwards to minimize copying */
for(end = d->entries + d->num_entries, e = end - 1; e >= d->entries; e--) {
if(krb5_kt_compare(context, e, entry->principal,
entry->vno, entry->keyblock.keytype)) {
krb5_kt_free_entry(context, e);
memmove(e, e + 1, (end - e - 1) * sizeof(*e));
memset(end - 1, 0, sizeof(*end));
d->num_entries--;
end--;
found = 1;
}
}
if (!found) {
krb5_clear_error_string (context);
return KRB5_KT_NOTFOUND;
}
e = realloc(d->entries, d->num_entries * sizeof(*d->entries));
if(e != NULL)
d->entries = e;
return 0;
}
const krb5_kt_ops krb5_mkt_ops = {
"MEMORY",
mkt_resolve,
mkt_get_name,
mkt_close,
NULL, /* get */
mkt_start_seq_get,
mkt_next_entry,
mkt_end_seq_get,
mkt_add_entry,
mkt_remove_entry
};
static krb5_error_code
mktw_get_entry(krb5_context context,
krb5_keytab id,
krb5_const_principal principal,
krb5_kvno kvno,
krb5_enctype enctype,
krb5_keytab_entry *entry)
{
krb5_keytab_entry tmp;
krb5_error_code ret;
krb5_kt_cursor cursor;
ret = krb5_kt_start_seq_get (context, id, &cursor);
if (ret)
return KRB5_KT_NOTFOUND; /* XXX i.e. file not found */
entry->vno = 0;
while (krb5_kt_next_entry(context, id, &tmp, &cursor) == 0) {
if (krb5_kt_compare(context, &tmp, NULL, 0, enctype)) {
if (kvno == tmp.vno) {
krb5_kt_copy_entry_contents (context, &tmp, entry);
krb5_kt_free_entry (context, &tmp);
krb5_kt_end_seq_get(context, id, &cursor);
return 0;
} else if (kvno == 0 && tmp.vno > entry->vno) {
if (entry->vno)
krb5_kt_free_entry (context, entry);
krb5_kt_copy_entry_contents (context, &tmp, entry);
}
}
krb5_kt_free_entry(context, &tmp);
}
krb5_kt_end_seq_get (context, id, &cursor);
if (entry->vno) {
return 0;
} else {
return KRB5_KT_NOTFOUND;
}
};
const krb5_kt_ops krb5_mktw_ops = {
"MEMORY_WILDCARD",
mkt_resolve,
mkt_get_name,
mkt_close,
mktw_get_entry, /* get */
mkt_start_seq_get,
mkt_next_entry,
mkt_end_seq_get,
mkt_add_entry,
mkt_remove_entry
};
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