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/*
* lib/krb5/ccache/ccbase.c
*
* Copyright 1990,2004 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.
*
*
* Registration functions for ccache.
*/
#include "k5-int.h"
#include "k5-thread.h"
#include "fcc.h"
struct krb5_cc_typelist {
const krb5_cc_ops *ops;
struct krb5_cc_typelist *next;
};
extern const krb5_cc_ops krb5_mcc_ops;
#ifdef _WIN32
extern const krb5_cc_ops krb5_lcc_ops;
static struct krb5_cc_typelist cc_lcc_entry = { &krb5_lcc_ops, NULL };
static struct krb5_cc_typelist cc_mcc_entry = { &krb5_mcc_ops, &cc_lcc_entry };
#else
static struct krb5_cc_typelist cc_mcc_entry = { &krb5_mcc_ops, NULL };
#endif
static struct krb5_cc_typelist cc_fcc_entry = { &krb5_cc_file_ops,
&cc_mcc_entry };
static struct krb5_cc_typelist *cc_typehead = &cc_fcc_entry;
static k5_mutex_t cc_typelist_lock = K5_MUTEX_PARTIAL_INITIALIZER;
int
krb5int_cc_initialize(void)
{
return k5_mutex_finish_init(&cc_typelist_lock);
}
void
krb5int_cc_finalize(void)
{
struct krb5_cc_typelist *t, *t_next;
k5_mutex_destroy(&cc_typelist_lock);
for (t = cc_typehead; t != &cc_fcc_entry; t = t_next) {
t_next = t->next;
free(t);
}
}
/*
* Register a new credentials cache type
* If override is set, replace any existing ccache with that type tag
*/
krb5_error_code KRB5_CALLCONV
krb5_cc_register(krb5_context context, krb5_cc_ops *ops, krb5_boolean override)
{
struct krb5_cc_typelist *t;
krb5_error_code err;
err = k5_mutex_lock(&cc_typelist_lock);
if (err)
return err;
for (t = cc_typehead;t && strcmp(t->ops->prefix,ops->prefix);t = t->next)
;
if (t) {
if (override) {
t->ops = ops;
k5_mutex_unlock(&cc_typelist_lock);
return 0;
} else {
k5_mutex_unlock(&cc_typelist_lock);
return KRB5_CC_TYPE_EXISTS;
}
}
if (!(t = (struct krb5_cc_typelist *) malloc(sizeof(*t)))) {
k5_mutex_unlock(&cc_typelist_lock);
return ENOMEM;
}
t->next = cc_typehead;
t->ops = ops;
cc_typehead = t;
k5_mutex_unlock(&cc_typelist_lock);
return 0;
}
/*
* Resolve a credential cache name into a cred. cache object.
*
* The name is currently constrained to be of the form "type:residual";
*
* The "type" portion corresponds to one of the predefined credential
* cache types, while the "residual" portion is specific to the
* particular cache type.
*/
#include <ctype.h>
krb5_error_code KRB5_CALLCONV
krb5_cc_resolve (krb5_context context, const char *name, krb5_ccache *cache)
{
struct krb5_cc_typelist *tlist;
char *pfx, *cp;
const char *resid;
unsigned int pfxlen;
krb5_error_code err;
cp = strchr (name, ':');
if (!cp) {
if (krb5_cc_dfl_ops)
return (*krb5_cc_dfl_ops->resolve)(context, cache, name);
else
return KRB5_CC_BADNAME;
}
pfxlen = cp - name;
if ( pfxlen == 1 && isalpha(name[0]) ) {
/* We found a drive letter not a prefix - use FILE: */
pfx = strdup("FILE:");
if (!pfx)
return ENOMEM;
resid = name;
} else {
resid = name + pfxlen + 1;
pfx = malloc (pfxlen+1);
if (!pfx)
return ENOMEM;
memcpy (pfx, name, pfxlen);
pfx[pfxlen] = '\0';
}
*cache = (krb5_ccache) 0;
err = k5_mutex_lock(&cc_typelist_lock);
if (err) {
free(pfx);
return err;
}
for (tlist = cc_typehead; tlist; tlist = tlist->next) {
if (strcmp (tlist->ops->prefix, pfx) == 0) {
krb5_error_code (KRB5_CALLCONV *ccresolver)() = tlist->ops->resolve;
k5_mutex_unlock(&cc_typelist_lock);
free(pfx);
return (*ccresolver)(context, cache, resid);
}
}
k5_mutex_unlock(&cc_typelist_lock);
if (krb5_cc_dfl_ops && !strcmp (pfx, krb5_cc_dfl_ops->prefix)) {
free (pfx);
return (*krb5_cc_dfl_ops->resolve)(context, cache, resid);
}
free(pfx);
return KRB5_CC_UNKNOWN_TYPE;
}
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