freebsd-skq/crypto/heimdal/lib/krb5/mcache.c
2001-06-21 02:12:07 +00:00

330 lines
7.1 KiB
C

/*
* Copyright (c) 1997-2000 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: mcache.c,v 1.13 2001/05/14 06:14:49 assar Exp $");
typedef struct krb5_mcache {
char *name;
unsigned int refcnt;
krb5_principal primary_principal;
struct link {
krb5_creds cred;
struct link *next;
} *creds;
struct krb5_mcache *next;
} krb5_mcache;
static struct krb5_mcache *mcc_head;
#define MCACHE(X) ((krb5_mcache *)(X)->data.data)
#define MISDEAD(X) ((X)->primary_principal == NULL)
#define MCC_CURSOR(C) ((struct link*)(C))
static char*
mcc_get_name(krb5_context context,
krb5_ccache id)
{
return MCACHE(id)->name;
}
static krb5_mcache *
mcc_alloc(const char *name)
{
krb5_mcache *m;
ALLOC(m, 1);
if(m == NULL)
return NULL;
if(name == NULL)
asprintf(&m->name, "%p", m);
else
m->name = strdup(name);
if(m->name == NULL) {
free(m);
return NULL;
}
m->refcnt = 1;
m->primary_principal = NULL;
m->creds = NULL;
m->next = mcc_head;
mcc_head = m;
return m;
}
static krb5_error_code
mcc_resolve(krb5_context context, krb5_ccache *id, const char *res)
{
krb5_mcache *m;
for (m = mcc_head; m != NULL; m = m->next)
if (strcmp(m->name, res) == 0)
break;
if (m != NULL) {
m->refcnt++;
(*id)->data.data = m;
(*id)->data.length = sizeof(*m);
return 0;
}
m = mcc_alloc(res);
if (m == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return KRB5_CC_NOMEM;
}
(*id)->data.data = m;
(*id)->data.length = sizeof(*m);
return 0;
}
static krb5_error_code
mcc_gen_new(krb5_context context, krb5_ccache *id)
{
krb5_mcache *m;
m = mcc_alloc(NULL);
if (m == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return KRB5_CC_NOMEM;
}
(*id)->data.data = m;
(*id)->data.length = sizeof(*m);
return 0;
}
static krb5_error_code
mcc_initialize(krb5_context context,
krb5_ccache id,
krb5_principal primary_principal)
{
return krb5_copy_principal (context,
primary_principal,
&MCACHE(id)->primary_principal);
}
static krb5_error_code
mcc_close(krb5_context context,
krb5_ccache id)
{
krb5_mcache *m = MCACHE(id);
if (--m->refcnt != 0)
return 0;
if (MISDEAD(m)) {
free (m->name);
krb5_data_free(&id->data);
}
return 0;
}
static krb5_error_code
mcc_destroy(krb5_context context,
krb5_ccache id)
{
krb5_mcache **n, *m = MCACHE(id);
struct link *l;
if (m->refcnt == 0)
krb5_abortx(context, "mcc_destroy: refcnt already 0");
if (!MISDEAD(m)) {
/* if this is an active mcache, remove it from the linked
list, and free all data */
for(n = &mcc_head; n && *n; n = &(*n)->next) {
if(m == *n) {
*n = m->next;
break;
}
}
krb5_free_principal (context, m->primary_principal);
m->primary_principal = NULL;
l = m->creds;
while (l != NULL) {
struct link *old;
krb5_free_creds_contents (context, &l->cred);
old = l;
l = l->next;
free (old);
}
m->creds = NULL;
}
return 0;
}
static krb5_error_code
mcc_store_cred(krb5_context context,
krb5_ccache id,
krb5_creds *creds)
{
krb5_mcache *m = MCACHE(id);
krb5_error_code ret;
struct link *l;
if (MISDEAD(m))
return ENOENT;
l = malloc (sizeof(*l));
if (l == NULL) {
krb5_set_error_string (context, "malloc: out of memory");
return KRB5_CC_NOMEM;
}
l->next = m->creds;
m->creds = l;
memset (&l->cred, 0, sizeof(l->cred));
ret = krb5_copy_creds_contents (context, creds, &l->cred);
if (ret) {
m->creds = l->next;
free (l);
return ret;
}
return 0;
}
static krb5_error_code
mcc_get_principal(krb5_context context,
krb5_ccache id,
krb5_principal *principal)
{
krb5_mcache *m = MCACHE(id);
if (MISDEAD(m))
return ENOENT;
return krb5_copy_principal (context,
m->primary_principal,
principal);
}
static krb5_error_code
mcc_get_first (krb5_context context,
krb5_ccache id,
krb5_cc_cursor *cursor)
{
krb5_mcache *m = MCACHE(id);
if (MISDEAD(m))
return ENOENT;
*cursor = m->creds;
return 0;
}
static krb5_error_code
mcc_get_next (krb5_context context,
krb5_ccache id,
krb5_cc_cursor *cursor,
krb5_creds *creds)
{
krb5_mcache *m = MCACHE(id);
struct link *l;
if (MISDEAD(m))
return ENOENT;
l = *cursor;
if (l != NULL) {
*cursor = l->next;
return krb5_copy_creds_contents (context,
&l->cred,
creds);
} else
return KRB5_CC_END;
}
static krb5_error_code
mcc_end_get (krb5_context context,
krb5_ccache id,
krb5_cc_cursor *cursor)
{
return 0;
}
static krb5_error_code
mcc_remove_cred(krb5_context context,
krb5_ccache id,
krb5_flags which,
krb5_creds *mcreds)
{
krb5_mcache *m = MCACHE(id);
struct link **q, *p;
for(q = &m->creds, p = *q; p; p = *q) {
if(krb5_compare_creds(context, which, mcreds, &p->cred)) {
*q = p->next;
krb5_free_cred_contents(context, &p->cred);
free(p);
} else
q = &p->next;
}
return 0;
}
static krb5_error_code
mcc_set_flags(krb5_context context,
krb5_ccache id,
krb5_flags flags)
{
return 0; /* XXX */
}
const krb5_cc_ops krb5_mcc_ops = {
"MEMORY",
mcc_get_name,
mcc_resolve,
mcc_gen_new,
mcc_initialize,
mcc_destroy,
mcc_close,
mcc_store_cred,
NULL, /* mcc_retrieve */
mcc_get_principal,
mcc_get_first,
mcc_get_next,
mcc_end_get,
mcc_remove_cred,
mcc_set_flags
};