/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. */
/* -*- mode: c; indent-tabs-mode: nil -*- */
/*
* Copyright 2007, 2008 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.
*
*/
#include "gssapiP_generic.h"
#include "mechglueP.h"
#include <string.h>
#include <stdio.h>
#ifndef _WIN32
#include <unistd.h>
#endif
/* Solaris Kerberos */
#define inline
#ifdef DEBUG
#undef DEBUG
#endif
/* The mapping table is 0-based, but let's export codes that are
1-based, keeping 0 for errors or unknown errors.
The elements in the mapping table currently have separate copies of
each OID stored. This is a bit wasteful, but we are assuming the
table isn't likely to grow very large. */
struct mecherror {
gss_OID_desc mech;
OM_uint32 code;
};
static inline int
cmp_OM_uint32(OM_uint32 m1, OM_uint32 m2)
{
if (m1 < m2)
return -1;
else if (m1 > m2)
return 1;
else
return 0;
}
static inline int
mecherror_cmp(struct mecherror m1, struct mecherror m2)
{
if (m1.code < m2.code)
return -1;
if (m1.code > m2.code)
return 1;
if (m1.mech.length < m2.mech.length)
return -1;
if (m1.mech.length > m2.mech.length)
return 1;
if (m1.mech.length == 0)
return 0;
return memcmp(m1.mech.elements, m2.mech.elements, m1.mech.length);
}
static void
print_OM_uint32 (OM_uint32 value, FILE *f)
{
fprintf(f, "%lu", (unsigned long) value);
}
static inline int
mecherror_copy(struct mecherror *dest, struct mecherror src)
{
*dest = src;
dest->mech.elements = malloc(src.mech.length);
if (dest->mech.elements == NULL) {
if (src.mech.length)
return ENOMEM;
else
return 0;
}
memcpy(dest->mech.elements, src.mech.elements, src.mech.length);
return 0;
}
static void
mecherror_print(struct mecherror value, FILE *f)
{
OM_uint32 minor;
gss_buffer_desc str;
static const struct {
const char *oidstr, *name;
} mechnames[] = {
{ "{ 1 2 840 113554 1 2 2 }", "krb5-new" },
{ "{ 1 3 5 1 5 2 }", "krb5-old" },
{ "{ 1 2 840 48018 1 2 2 }", "krb5-microsoft" },
{ "{ 1 3 6 1 5 5 2 }", "spnego" },
};
unsigned int i;
fprintf(f, "%lu@", (unsigned long) value.code);
if (value.mech.length == 0) {
fprintf(f, "(com_err)");
return;
}
fprintf(f, "%p=", value.mech.elements);
if (generic_gss_oid_to_str(&minor, &value.mech, &str)) {
fprintf(f, "(error in conversion)");
return;
}
/* Note: generic_gss_oid_to_str returns a null-terminated string. */
for (i = 0; i < sizeof(mechnames)/sizeof(mechnames[0]); i++) {
if (!strcmp(str.value, mechnames[i].oidstr) && mechnames[i].name != 0) {
fprintf(f, "%s", mechnames[i].name);
break;
}
}
if (i == sizeof(mechnames)/sizeof(mechnames[0]))
fprintf(f, "%s", (char *) str.value);
generic_gss_release_buffer(&minor, &str);
}
#include "errmap.h"
#include "krb5.h" /* for KRB5KRB_AP_WRONG_PRINC */
static mecherrmap m;
static k5_mutex_t mutex = K5_MUTEX_PARTIAL_INITIALIZER;
static OM_uint32 next_fake = 100000;
int gssint_mecherrmap_init(void)
{
int err;
err = mecherrmap_init(&m);
if (err)
return err;
err = k5_mutex_finish_init(&mutex);
if (err) {
mecherrmap_destroy(&m);
return err;
}
return 0;
}
/* Currently the enumeration template doesn't handle freeing
element storage when destroying the collection. */
static int free_one(OM_uint32 i, struct mecherror value, void *p)
{
if (value.mech.length && value.mech.elements)
free(value.mech.elements);
return 0;
}
void gssint_mecherrmap_destroy(void)
{
mecherrmap_foreach(&m, free_one, NULL);
mecherrmap_destroy(&m);
k5_mutex_destroy(&mutex);
}
OM_uint32 gssint_mecherrmap_map(OM_uint32 minor, const gss_OID_desc * oid)
{
const struct mecherror *mep;
struct mecherror me, me_copy;
const OM_uint32 *p;
int err;
OM_uint32 new_status;
#ifdef DEBUG
FILE *f;
f = fopen("/dev/pts/9", "w+");
if (f == NULL)
f = stderr;
#endif
me.code = minor;
me.mech = *oid;
err = k5_mutex_lock(&mutex);
if (err) {
#ifdef DEBUG
if (f != stderr) fclose(f);
#endif
return 0;
}
/* Is this status+oid already mapped? */
p = mecherrmap_findright(&m, me);
if (p != NULL) {
k5_mutex_unlock(&mutex);
#ifdef DEBUG
fprintf(f, "%s: found ", __func__);
mecherror_print(me, f);
fprintf(f, " in map as %lu\n", (unsigned long) *p);
if (f != stderr) fclose(f);
#endif
return *p;
}
/* Is this status code already mapped to something else
mech-specific? */
mep = mecherrmap_findleft(&m, minor);
if (mep == NULL) {
/* Map it to itself plus this mech-oid. */
new_status = minor;
} else {
/* Already assigned. Pick a fake new value and map it. */
/* There's a theoretical infinite loop risk here, if we fill
in 2**32 values. Also, returning 0 has a special
meaning. */
do {
next_fake++;
new_status = next_fake;
if (new_status == 0)
/* ??? */;
} while (mecherrmap_findleft(&m, new_status) != NULL);
}
err = mecherror_copy(&me_copy, me);
if (err) {
k5_mutex_unlock(&mutex);
return err;
}
err = mecherrmap_add(&m, new_status, me_copy);
k5_mutex_unlock(&mutex);
if (err) {
if (me_copy.mech.length)
free(me_copy.mech.elements);
}
#ifdef DEBUG
fprintf(f, "%s: mapping ", __func__);
mecherror_print(me, f);
fprintf(f, " to %lu: err=%d\nnew map: ", (unsigned long) new_status, err);
mecherrmap_printmap(&m, f);
fprintf(f, "\n");
if (f != stderr) fclose(f);
#endif
if (err)
return 0;
else
return new_status;
}
static gss_OID_desc no_oid = { 0, 0 };
OM_uint32 gssint_mecherrmap_map_errcode(OM_uint32 errcode)
{
return gssint_mecherrmap_map(errcode, &no_oid);
}
int gssint_mecherrmap_get(OM_uint32 minor, gss_OID mech_oid,
OM_uint32 *mech_minor)
{
const struct mecherror *p;
int err;
if (minor == 0) {
return EINVAL;
}
err = k5_mutex_lock(&mutex);
if (err)
return err;
p = mecherrmap_findleft(&m, minor);
k5_mutex_unlock(&mutex);
if (!p) {
return EINVAL;
}
*mech_oid = p->mech;
*mech_minor = p->code;
return 0;
}