330 lines
7.1 KiB
C
330 lines
7.1 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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RCSID("$Id: mcache.c,v 1.14 2001/06/17 23:13:02 assar Exp $");
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typedef struct krb5_mcache {
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char *name;
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unsigned int refcnt;
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krb5_principal primary_principal;
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struct link {
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krb5_creds cred;
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struct link *next;
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} *creds;
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struct krb5_mcache *next;
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} krb5_mcache;
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static struct krb5_mcache *mcc_head;
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#define MCACHE(X) ((krb5_mcache *)(X)->data.data)
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#define MISDEAD(X) ((X)->primary_principal == NULL)
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#define MCC_CURSOR(C) ((struct link*)(C))
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static char*
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mcc_get_name(krb5_context context,
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krb5_ccache id)
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{
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return MCACHE(id)->name;
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}
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static krb5_mcache *
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mcc_alloc(const char *name)
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{
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krb5_mcache *m;
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ALLOC(m, 1);
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if(m == NULL)
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return NULL;
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if(name == NULL)
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asprintf(&m->name, "%p", m);
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else
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m->name = strdup(name);
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if(m->name == NULL) {
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free(m);
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return NULL;
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}
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m->refcnt = 1;
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m->primary_principal = NULL;
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m->creds = NULL;
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m->next = mcc_head;
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mcc_head = m;
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return m;
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}
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static krb5_error_code
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mcc_resolve(krb5_context context, krb5_ccache *id, const char *res)
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{
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krb5_mcache *m;
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for (m = mcc_head; m != NULL; m = m->next)
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if (strcmp(m->name, res) == 0)
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break;
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if (m != NULL) {
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m->refcnt++;
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(*id)->data.data = m;
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(*id)->data.length = sizeof(*m);
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return 0;
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}
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m = mcc_alloc(res);
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if (m == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return KRB5_CC_NOMEM;
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}
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(*id)->data.data = m;
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(*id)->data.length = sizeof(*m);
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return 0;
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}
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static krb5_error_code
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mcc_gen_new(krb5_context context, krb5_ccache *id)
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{
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krb5_mcache *m;
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m = mcc_alloc(NULL);
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if (m == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return KRB5_CC_NOMEM;
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}
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(*id)->data.data = m;
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(*id)->data.length = sizeof(*m);
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return 0;
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}
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static krb5_error_code
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mcc_initialize(krb5_context context,
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krb5_ccache id,
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krb5_principal primary_principal)
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{
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return krb5_copy_principal (context,
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primary_principal,
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&MCACHE(id)->primary_principal);
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}
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static krb5_error_code
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mcc_close(krb5_context context,
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krb5_ccache id)
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{
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krb5_mcache *m = MCACHE(id);
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if (--m->refcnt != 0)
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return 0;
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if (MISDEAD(m)) {
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free (m->name);
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krb5_data_free(&id->data);
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}
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return 0;
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}
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static krb5_error_code
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mcc_destroy(krb5_context context,
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krb5_ccache id)
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{
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krb5_mcache **n, *m = MCACHE(id);
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struct link *l;
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if (m->refcnt == 0)
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krb5_abortx(context, "mcc_destroy: refcnt already 0");
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if (!MISDEAD(m)) {
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/* if this is an active mcache, remove it from the linked
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list, and free all data */
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for(n = &mcc_head; n && *n; n = &(*n)->next) {
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if(m == *n) {
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*n = m->next;
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break;
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}
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}
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krb5_free_principal (context, m->primary_principal);
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m->primary_principal = NULL;
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l = m->creds;
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while (l != NULL) {
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struct link *old;
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krb5_free_creds_contents (context, &l->cred);
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old = l;
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l = l->next;
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free (old);
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}
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m->creds = NULL;
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}
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return 0;
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}
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static krb5_error_code
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mcc_store_cred(krb5_context context,
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krb5_ccache id,
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krb5_creds *creds)
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{
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krb5_mcache *m = MCACHE(id);
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krb5_error_code ret;
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struct link *l;
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if (MISDEAD(m))
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return ENOENT;
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l = malloc (sizeof(*l));
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if (l == NULL) {
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krb5_set_error_string (context, "malloc: out of memory");
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return KRB5_CC_NOMEM;
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}
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l->next = m->creds;
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m->creds = l;
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memset (&l->cred, 0, sizeof(l->cred));
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ret = krb5_copy_creds_contents (context, creds, &l->cred);
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if (ret) {
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m->creds = l->next;
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free (l);
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return ret;
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}
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return 0;
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}
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static krb5_error_code
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mcc_get_principal(krb5_context context,
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krb5_ccache id,
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krb5_principal *principal)
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{
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krb5_mcache *m = MCACHE(id);
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if (MISDEAD(m))
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return ENOENT;
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return krb5_copy_principal (context,
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m->primary_principal,
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principal);
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}
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static krb5_error_code
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mcc_get_first (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor)
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{
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krb5_mcache *m = MCACHE(id);
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if (MISDEAD(m))
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return ENOENT;
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*cursor = m->creds;
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return 0;
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}
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static krb5_error_code
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mcc_get_next (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor,
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krb5_creds *creds)
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{
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krb5_mcache *m = MCACHE(id);
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struct link *l;
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if (MISDEAD(m))
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return ENOENT;
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l = *cursor;
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if (l != NULL) {
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*cursor = l->next;
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return krb5_copy_creds_contents (context,
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&l->cred,
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creds);
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} else
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return KRB5_CC_END;
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}
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static krb5_error_code
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mcc_end_get (krb5_context context,
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krb5_ccache id,
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krb5_cc_cursor *cursor)
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{
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return 0;
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}
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static krb5_error_code
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mcc_remove_cred(krb5_context context,
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krb5_ccache id,
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krb5_flags which,
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krb5_creds *mcreds)
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{
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krb5_mcache *m = MCACHE(id);
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struct link **q, *p;
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for(q = &m->creds, p = *q; p; p = *q) {
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if(krb5_compare_creds(context, which, mcreds, &p->cred)) {
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*q = p->next;
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krb5_free_creds_contents(context, &p->cred);
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free(p);
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} else
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q = &p->next;
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}
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return 0;
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}
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static krb5_error_code
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mcc_set_flags(krb5_context context,
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krb5_ccache id,
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krb5_flags flags)
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{
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return 0; /* XXX */
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}
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const krb5_cc_ops krb5_mcc_ops = {
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"MEMORY",
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mcc_get_name,
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mcc_resolve,
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mcc_gen_new,
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mcc_initialize,
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mcc_destroy,
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mcc_close,
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mcc_store_cred,
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NULL, /* mcc_retrieve */
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mcc_get_principal,
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mcc_get_first,
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mcc_get_next,
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mcc_end_get,
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mcc_remove_cred,
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mcc_set_flags
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};
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