313 lines
7.5 KiB
C
313 lines
7.5 KiB
C
/*
|
|
* Copyright (c) 1997-2001 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"
|
|
#include <vis.h>
|
|
|
|
RCSID("$Id: replay.c 17047 2006-04-10 17:13:49Z lha $");
|
|
|
|
struct krb5_rcache_data {
|
|
char *name;
|
|
};
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_resolve(krb5_context context,
|
|
krb5_rcache id,
|
|
const char *name)
|
|
{
|
|
id->name = strdup(name);
|
|
if(id->name == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return KRB5_RC_MALLOC;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_resolve_type(krb5_context context,
|
|
krb5_rcache *id,
|
|
const char *type)
|
|
{
|
|
*id = NULL;
|
|
if(strcmp(type, "FILE")) {
|
|
krb5_set_error_string (context, "replay cache type %s not supported",
|
|
type);
|
|
return KRB5_RC_TYPE_NOTFOUND;
|
|
}
|
|
*id = calloc(1, sizeof(**id));
|
|
if(*id == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return KRB5_RC_MALLOC;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_resolve_full(krb5_context context,
|
|
krb5_rcache *id,
|
|
const char *string_name)
|
|
{
|
|
krb5_error_code ret;
|
|
|
|
*id = NULL;
|
|
|
|
if(strncmp(string_name, "FILE:", 5)) {
|
|
krb5_set_error_string (context, "replay cache type %s not supported",
|
|
string_name);
|
|
return KRB5_RC_TYPE_NOTFOUND;
|
|
}
|
|
ret = krb5_rc_resolve_type(context, id, "FILE");
|
|
if(ret)
|
|
return ret;
|
|
ret = krb5_rc_resolve(context, *id, string_name + 5);
|
|
if (ret) {
|
|
krb5_rc_close(context, *id);
|
|
*id = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
const char* KRB5_LIB_FUNCTION
|
|
krb5_rc_default_name(krb5_context context)
|
|
{
|
|
return "FILE:/var/run/default_rcache";
|
|
}
|
|
|
|
const char* KRB5_LIB_FUNCTION
|
|
krb5_rc_default_type(krb5_context context)
|
|
{
|
|
return "FILE";
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_default(krb5_context context,
|
|
krb5_rcache *id)
|
|
{
|
|
return krb5_rc_resolve_full(context, id, krb5_rc_default_name(context));
|
|
}
|
|
|
|
struct rc_entry{
|
|
time_t stamp;
|
|
unsigned char data[16];
|
|
};
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_initialize(krb5_context context,
|
|
krb5_rcache id,
|
|
krb5_deltat auth_lifespan)
|
|
{
|
|
FILE *f = fopen(id->name, "w");
|
|
struct rc_entry tmp;
|
|
int ret;
|
|
|
|
if(f == NULL) {
|
|
ret = errno;
|
|
krb5_set_error_string (context, "open(%s): %s", id->name,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
tmp.stamp = auth_lifespan;
|
|
fwrite(&tmp, 1, sizeof(tmp), f);
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_recover(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_destroy(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
int ret;
|
|
|
|
if(remove(id->name) < 0) {
|
|
ret = errno;
|
|
krb5_set_error_string (context, "remove(%s): %s", id->name,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
return krb5_rc_close(context, id);
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_close(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
free(id->name);
|
|
free(id);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
checksum_authenticator(Authenticator *auth, void *data)
|
|
{
|
|
MD5_CTX md5;
|
|
int i;
|
|
|
|
MD5_Init (&md5);
|
|
MD5_Update (&md5, auth->crealm, strlen(auth->crealm));
|
|
for(i = 0; i < auth->cname.name_string.len; i++)
|
|
MD5_Update(&md5, auth->cname.name_string.val[i],
|
|
strlen(auth->cname.name_string.val[i]));
|
|
MD5_Update (&md5, &auth->ctime, sizeof(auth->ctime));
|
|
MD5_Update (&md5, &auth->cusec, sizeof(auth->cusec));
|
|
MD5_Final (data, &md5);
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_store(krb5_context context,
|
|
krb5_rcache id,
|
|
krb5_donot_replay *rep)
|
|
{
|
|
struct rc_entry ent, tmp;
|
|
time_t t;
|
|
FILE *f;
|
|
int ret;
|
|
|
|
ent.stamp = time(NULL);
|
|
checksum_authenticator(rep, ent.data);
|
|
f = fopen(id->name, "r");
|
|
if(f == NULL) {
|
|
ret = errno;
|
|
krb5_set_error_string (context, "open(%s): %s", id->name,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
fread(&tmp, sizeof(ent), 1, f);
|
|
t = ent.stamp - tmp.stamp;
|
|
while(fread(&tmp, sizeof(ent), 1, f)){
|
|
if(tmp.stamp < t)
|
|
continue;
|
|
if(memcmp(tmp.data, ent.data, sizeof(ent.data)) == 0){
|
|
fclose(f);
|
|
krb5_clear_error_string (context);
|
|
return KRB5_RC_REPLAY;
|
|
}
|
|
}
|
|
if(ferror(f)){
|
|
ret = errno;
|
|
fclose(f);
|
|
krb5_set_error_string (context, "%s: %s", id->name, strerror(ret));
|
|
return ret;
|
|
}
|
|
fclose(f);
|
|
f = fopen(id->name, "a");
|
|
if(f == NULL) {
|
|
krb5_set_error_string (context, "open(%s): %s", id->name,
|
|
strerror(errno));
|
|
return KRB5_RC_IO_UNKNOWN;
|
|
}
|
|
fwrite(&ent, 1, sizeof(ent), f);
|
|
fclose(f);
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_expunge(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_rc_get_lifespan(krb5_context context,
|
|
krb5_rcache id,
|
|
krb5_deltat *auth_lifespan)
|
|
{
|
|
FILE *f = fopen(id->name, "r");
|
|
int r;
|
|
struct rc_entry ent;
|
|
r = fread(&ent, sizeof(ent), 1, f);
|
|
fclose(f);
|
|
if(r){
|
|
*auth_lifespan = ent.stamp;
|
|
return 0;
|
|
}
|
|
krb5_clear_error_string (context);
|
|
return KRB5_RC_IO_UNKNOWN;
|
|
}
|
|
|
|
const char* KRB5_LIB_FUNCTION
|
|
krb5_rc_get_name(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
return id->name;
|
|
}
|
|
|
|
const char* KRB5_LIB_FUNCTION
|
|
krb5_rc_get_type(krb5_context context,
|
|
krb5_rcache id)
|
|
{
|
|
return "FILE";
|
|
}
|
|
|
|
krb5_error_code KRB5_LIB_FUNCTION
|
|
krb5_get_server_rcache(krb5_context context,
|
|
const krb5_data *piece,
|
|
krb5_rcache *id)
|
|
{
|
|
krb5_rcache rcache;
|
|
krb5_error_code ret;
|
|
|
|
char *tmp = malloc(4 * piece->length + 1);
|
|
char *name;
|
|
|
|
if(tmp == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
strvisx(tmp, piece->data, piece->length, VIS_WHITE | VIS_OCTAL);
|
|
#ifdef HAVE_GETEUID
|
|
asprintf(&name, "FILE:rc_%s_%u", tmp, (unsigned)geteuid());
|
|
#else
|
|
asprintf(&name, "FILE:rc_%s", tmp);
|
|
#endif
|
|
free(tmp);
|
|
if(name == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
|
|
ret = krb5_rc_resolve_full(context, &rcache, name);
|
|
free(name);
|
|
if(ret)
|
|
return ret;
|
|
*id = rcache;
|
|
return ret;
|
|
}
|