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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* lib/krb5/ccache/cccursor.c */
/*
* Copyright 2006, 2007 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
/*
* cursor for sequential traversal of ccaches
*/
#include "cc-int.h"
#include <assert.h>
struct _krb5_cccol_cursor {
krb5_cc_typecursor typecursor;
const krb5_cc_ops *ops;
krb5_cc_ptcursor ptcursor;
};
/* typedef of krb5_cccol_cursor is in krb5.h */
krb5_error_code KRB5_CALLCONV
krb5_cccol_cursor_new(krb5_context context,
krb5_cccol_cursor *cursor)
{
krb5_error_code ret = 0;
krb5_cccol_cursor n = NULL;
*cursor = NULL;
n = malloc(sizeof(*n));
if (n == NULL)
return ENOMEM;
n->typecursor = NULL;
n->ptcursor = NULL;
n->ops = NULL;
ret = krb5int_cc_typecursor_new(context, &n->typecursor);
if (ret)
goto errout;
do {
/* Find first backend with ptcursor functionality. */
ret = krb5int_cc_typecursor_next(context, n->typecursor, &n->ops);
if (ret || n->ops == NULL)
goto errout;
} while (n->ops->ptcursor_new == NULL);
ret = n->ops->ptcursor_new(context, &n->ptcursor);
if (ret)
goto errout;
errout:
if (ret) {
krb5_cccol_cursor_free(context, &n);
}
*cursor = n;
return ret;
}
krb5_error_code KRB5_CALLCONV
krb5_cccol_cursor_next(krb5_context context,
krb5_cccol_cursor cursor,
krb5_ccache *ccache_out)
{
krb5_error_code ret = 0;
krb5_ccache ccache;
*ccache_out = NULL;
/* Are we out of backends? */
if (cursor->ops == NULL)
return 0;
while (1) {
ret = cursor->ops->ptcursor_next(context, cursor->ptcursor, &ccache);
if (ret)
return ret;
if (ccache != NULL) {
*ccache_out = ccache;
return 0;
}
ret = cursor->ops->ptcursor_free(context, &cursor->ptcursor);
if (ret)
return ret;
do {
/* Find next type with ptcursor functionality. */
ret = krb5int_cc_typecursor_next(context, cursor->typecursor,
&cursor->ops);
if (ret)
return ret;
if (cursor->ops == NULL)
return 0;
} while (cursor->ops->ptcursor_new == NULL);
ret = cursor->ops->ptcursor_new(context, &cursor->ptcursor);
if (ret)
return ret;
}
}
krb5_error_code KRB5_CALLCONV
krb5_cccol_cursor_free(krb5_context context,
krb5_cccol_cursor *cursor)
{
krb5_cccol_cursor c = *cursor;
if (c == NULL)
return 0;
if (c->ptcursor != NULL)
c->ops->ptcursor_free(context, &c->ptcursor);
if (c->typecursor != NULL)
krb5int_cc_typecursor_free(context, &c->typecursor);
free(c);
*cursor = NULL;
return 0;
}
krb5_error_code KRB5_CALLCONV
krb5_cccol_last_change_time(krb5_context context,
krb5_timestamp *change_time)
{
krb5_error_code ret = 0;
krb5_cccol_cursor c = NULL;
krb5_ccache ccache = NULL;
krb5_timestamp last_time = 0;
krb5_timestamp max_change_time = 0;
*change_time = 0;
ret = krb5_cccol_cursor_new(context, &c);
while (!ret) {
ret = krb5_cccol_cursor_next(context, c, &ccache);
if (ccache) {
ret = krb5_cc_last_change_time(context, ccache, &last_time);
if (!ret && last_time > max_change_time) {
max_change_time = last_time;
}
ret = 0;
}
else {
break;
}
}
*change_time = max_change_time;
return ret;
}
/*
* krb5_cccol_lock and krb5_cccol_unlock are defined in ccbase.c
*/
krb5_error_code KRB5_CALLCONV
krb5_cc_cache_match(krb5_context context, krb5_principal client,
krb5_ccache *cache_out)
{
krb5_error_code ret;
krb5_cccol_cursor cursor;
krb5_ccache cache = NULL;
krb5_principal princ;
char *name;
krb5_boolean eq;
*cache_out = NULL;
ret = krb5_cccol_cursor_new(context, &cursor);
if (ret)
return ret;
while ((ret = krb5_cccol_cursor_next(context, cursor, &cache)) == 0 &&
cache != NULL) {
ret = krb5_cc_get_principal(context, cache, &princ);
if (ret == 0) {
eq = krb5_principal_compare(context, princ, client);
krb5_free_principal(context, princ);
if (eq)
break;
}
krb5_cc_close(context, cache);
}
krb5_cccol_cursor_free(context, &cursor);
if (ret)
return ret;
if (cache == NULL) {
ret = krb5_unparse_name(context, client, &name);
if (ret == 0) {
k5_setmsg(context, KRB5_CC_NOTFOUND,
_("Can't find client principal %s in cache collection"),
name);
krb5_free_unparsed_name(context, name);
}
ret = KRB5_CC_NOTFOUND;
} else
*cache_out = cache;
return ret;
}
krb5_error_code KRB5_CALLCONV
krb5_cccol_have_content(krb5_context context)
{
krb5_cccol_cursor col_cursor;
krb5_cc_cursor cache_cursor;
krb5_ccache cache;
krb5_creds creds;
krb5_boolean found = FALSE;
if (krb5_cccol_cursor_new(context, &col_cursor))
goto no_entries;
while (!found && !krb5_cccol_cursor_next(context, col_cursor, &cache) &&
cache != NULL) {
if (krb5_cc_start_seq_get(context, cache, &cache_cursor))
continue;
while (!found &&
!krb5_cc_next_cred(context, cache, &cache_cursor, &creds)) {
if (!krb5_is_config_principal(context, creds.server))
found = TRUE;
krb5_free_cred_contents(context, &creds);
}
krb5_cc_end_seq_get(context, cache, &cache_cursor);
krb5_cc_close(context, cache);
}
krb5_cccol_cursor_free(context, &col_cursor);
if (found)
return 0;
no_entries:
k5_setmsg(context, KRB5_CC_NOTFOUND,
_("No Kerberos credentials available"));
return KRB5_CC_NOTFOUND;
}
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