575 lines
14 KiB
C
575 lines
14 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"
|
|
|
|
RCSID("$Id: keytab_file.c,v 1.8 2001/05/14 06:14:48 assar Exp $");
|
|
|
|
#define KRB5_KT_VNO_1 1
|
|
#define KRB5_KT_VNO_2 2
|
|
#define KRB5_KT_VNO KRB5_KT_VNO_2
|
|
|
|
/* file operations -------------------------------------------- */
|
|
|
|
struct fkt_data {
|
|
char *filename;
|
|
};
|
|
|
|
static krb5_error_code
|
|
krb5_kt_ret_data(krb5_context context,
|
|
krb5_storage *sp,
|
|
krb5_data *data)
|
|
{
|
|
int ret;
|
|
int16_t size;
|
|
ret = krb5_ret_int16(sp, &size);
|
|
if(ret)
|
|
return ret;
|
|
data->length = size;
|
|
data->data = malloc(size);
|
|
if (data->data == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
ret = sp->fetch(sp, data->data, size);
|
|
if(ret != size)
|
|
return (ret < 0)? errno : KRB5_KT_END;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_ret_string(krb5_context context,
|
|
krb5_storage *sp,
|
|
general_string *data)
|
|
{
|
|
int ret;
|
|
int16_t size;
|
|
ret = krb5_ret_int16(sp, &size);
|
|
if(ret)
|
|
return ret;
|
|
*data = malloc(size + 1);
|
|
if (*data == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
ret = sp->fetch(sp, *data, size);
|
|
(*data)[size] = '\0';
|
|
if(ret != size)
|
|
return (ret < 0)? errno : KRB5_KT_END;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_store_data(krb5_context context,
|
|
krb5_storage *sp,
|
|
krb5_data data)
|
|
{
|
|
int ret;
|
|
ret = krb5_store_int16(sp, data.length);
|
|
if(ret < 0)
|
|
return ret;
|
|
ret = sp->store(sp, data.data, data.length);
|
|
if(ret != data.length){
|
|
if(ret < 0)
|
|
return errno;
|
|
return KRB5_KT_END;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_store_string(krb5_storage *sp,
|
|
general_string data)
|
|
{
|
|
int ret;
|
|
size_t len = strlen(data);
|
|
ret = krb5_store_int16(sp, len);
|
|
if(ret < 0)
|
|
return ret;
|
|
ret = sp->store(sp, data, len);
|
|
if(ret != len){
|
|
if(ret < 0)
|
|
return errno;
|
|
return KRB5_KT_END;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_ret_keyblock(krb5_context context, krb5_storage *sp, krb5_keyblock *p)
|
|
{
|
|
int ret;
|
|
int16_t tmp;
|
|
|
|
ret = krb5_ret_int16(sp, &tmp); /* keytype + etype */
|
|
if(ret) return ret;
|
|
p->keytype = tmp;
|
|
ret = krb5_kt_ret_data(context, sp, &p->keyvalue);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_store_keyblock(krb5_context context,
|
|
krb5_storage *sp,
|
|
krb5_keyblock *p)
|
|
{
|
|
int ret;
|
|
|
|
ret = krb5_store_int16(sp, p->keytype); /* keytype + etype */
|
|
if(ret) return ret;
|
|
ret = krb5_kt_store_data(context, sp, p->keyvalue);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static krb5_error_code
|
|
krb5_kt_ret_principal(krb5_context context,
|
|
krb5_storage *sp,
|
|
krb5_principal *princ)
|
|
{
|
|
int i;
|
|
int ret;
|
|
krb5_principal p;
|
|
int16_t tmp;
|
|
|
|
ALLOC(p, 1);
|
|
if(p == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
|
|
ret = krb5_ret_int16(sp, &tmp);
|
|
if(ret)
|
|
return ret;
|
|
if (sp->flags & KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS)
|
|
tmp--;
|
|
p->name.name_string.len = tmp;
|
|
ret = krb5_kt_ret_string(context, sp, &p->realm);
|
|
if(ret)
|
|
return ret;
|
|
p->name.name_string.val = calloc(p->name.name_string.len,
|
|
sizeof(*p->name.name_string.val));
|
|
if(p->name.name_string.val == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
for(i = 0; i < p->name.name_string.len; i++){
|
|
ret = krb5_kt_ret_string(context, sp, p->name.name_string.val + i);
|
|
if(ret)
|
|
return ret;
|
|
}
|
|
if (krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE))
|
|
p->name.name_type = KRB5_NT_UNKNOWN;
|
|
else {
|
|
int32_t tmp32;
|
|
ret = krb5_ret_int32(sp, &tmp32);
|
|
p->name.name_type = tmp32;
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
*princ = p;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
krb5_kt_store_principal(krb5_context context,
|
|
krb5_storage *sp,
|
|
krb5_principal p)
|
|
{
|
|
int i;
|
|
int ret;
|
|
|
|
if(krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS))
|
|
ret = krb5_store_int16(sp, p->name.name_string.len + 1);
|
|
else
|
|
ret = krb5_store_int16(sp, p->name.name_string.len);
|
|
if(ret) return ret;
|
|
ret = krb5_kt_store_string(sp, p->realm);
|
|
if(ret) return ret;
|
|
for(i = 0; i < p->name.name_string.len; i++){
|
|
ret = krb5_kt_store_string(sp, p->name.name_string.val[i]);
|
|
if(ret)
|
|
return ret;
|
|
}
|
|
if(!krb5_storage_is_flags(sp, KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE)) {
|
|
ret = krb5_store_int32(sp, p->name.name_type);
|
|
if(ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_resolve(krb5_context context, const char *name, krb5_keytab id)
|
|
{
|
|
struct fkt_data *d;
|
|
|
|
d = malloc(sizeof(*d));
|
|
if(d == NULL) {
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
d->filename = strdup(name);
|
|
if(d->filename == NULL) {
|
|
free(d);
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
return ENOMEM;
|
|
}
|
|
id->data = d;
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_close(krb5_context context, krb5_keytab id)
|
|
{
|
|
struct fkt_data *d = id->data;
|
|
free(d->filename);
|
|
free(d);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_get_name(krb5_context context,
|
|
krb5_keytab id,
|
|
char *name,
|
|
size_t namesize)
|
|
{
|
|
/* This function is XXX */
|
|
struct fkt_data *d = id->data;
|
|
strlcpy(name, d->filename, namesize);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
storage_set_flags(krb5_context context, krb5_storage *sp, int vno)
|
|
{
|
|
int flags = 0;
|
|
switch(vno) {
|
|
case KRB5_KT_VNO_1:
|
|
flags |= KRB5_STORAGE_PRINCIPAL_WRONG_NUM_COMPONENTS;
|
|
flags |= KRB5_STORAGE_PRINCIPAL_NO_NAME_TYPE;
|
|
flags |= KRB5_STORAGE_HOST_BYTEORDER;
|
|
break;
|
|
case KRB5_KT_VNO_2:
|
|
break;
|
|
default:
|
|
krb5_abortx(context,
|
|
"storage_set_flags called with bad vno (%x)", vno);
|
|
}
|
|
krb5_storage_set_flags(sp, flags);
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_start_seq_get_int(krb5_context context,
|
|
krb5_keytab id,
|
|
int flags,
|
|
krb5_kt_cursor *c)
|
|
{
|
|
int8_t pvno, tag;
|
|
krb5_error_code ret;
|
|
struct fkt_data *d = id->data;
|
|
|
|
c->fd = open (d->filename, flags);
|
|
if (c->fd < 0) {
|
|
ret = errno;
|
|
krb5_set_error_string(context, "open(%s): %s", d->filename,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
c->sp = krb5_storage_from_fd(c->fd);
|
|
ret = krb5_ret_int8(c->sp, &pvno);
|
|
if(ret) {
|
|
krb5_storage_free(c->sp);
|
|
close(c->fd);
|
|
return ret;
|
|
}
|
|
if(pvno != 5) {
|
|
krb5_storage_free(c->sp);
|
|
close(c->fd);
|
|
krb5_clear_error_string (context);
|
|
return KRB5_KEYTAB_BADVNO;
|
|
}
|
|
ret = krb5_ret_int8(c->sp, &tag);
|
|
if (ret) {
|
|
krb5_storage_free(c->sp);
|
|
close(c->fd);
|
|
return ret;
|
|
}
|
|
id->version = tag;
|
|
storage_set_flags(context, c->sp, id->version);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_start_seq_get(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_kt_cursor *c)
|
|
{
|
|
return fkt_start_seq_get_int(context, id, O_RDONLY | O_BINARY, c);
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_next_entry_int(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry,
|
|
krb5_kt_cursor *cursor,
|
|
off_t *start,
|
|
off_t *end)
|
|
{
|
|
int32_t len;
|
|
int ret;
|
|
int8_t tmp8;
|
|
int32_t tmp32;
|
|
off_t pos;
|
|
|
|
pos = cursor->sp->seek(cursor->sp, 0, SEEK_CUR);
|
|
loop:
|
|
ret = krb5_ret_int32(cursor->sp, &len);
|
|
if (ret)
|
|
return ret;
|
|
if(len < 0) {
|
|
pos = cursor->sp->seek(cursor->sp, -len, SEEK_CUR);
|
|
goto loop;
|
|
}
|
|
ret = krb5_kt_ret_principal (context, cursor->sp, &entry->principal);
|
|
if (ret)
|
|
goto out;
|
|
ret = krb5_ret_int32(cursor->sp, &tmp32);
|
|
entry->timestamp = tmp32;
|
|
if (ret)
|
|
goto out;
|
|
ret = krb5_ret_int8(cursor->sp, &tmp8);
|
|
if (ret)
|
|
goto out;
|
|
entry->vno = tmp8;
|
|
ret = krb5_kt_ret_keyblock (context, cursor->sp, &entry->keyblock);
|
|
if (ret)
|
|
goto out;
|
|
if(start) *start = pos;
|
|
if(end) *end = *start + 4 + len;
|
|
out:
|
|
cursor->sp->seek(cursor->sp, pos + 4 + len, SEEK_SET);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_next_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry,
|
|
krb5_kt_cursor *cursor)
|
|
{
|
|
return fkt_next_entry_int(context, id, entry, cursor, NULL, NULL);
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_end_seq_get(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_kt_cursor *cursor)
|
|
{
|
|
krb5_storage_free(cursor->sp);
|
|
close(cursor->fd);
|
|
return 0;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_add_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry)
|
|
{
|
|
int ret;
|
|
int fd;
|
|
krb5_storage *sp;
|
|
struct fkt_data *d = id->data;
|
|
krb5_data keytab;
|
|
int32_t len;
|
|
|
|
fd = open (d->filename, O_RDWR | O_BINARY);
|
|
if (fd < 0) {
|
|
fd = open (d->filename, O_RDWR | O_CREAT | O_BINARY, 0600);
|
|
if (fd < 0) {
|
|
ret = errno;
|
|
krb5_set_error_string(context, "open(%s): %s", d->filename,
|
|
strerror(ret));
|
|
return ret;
|
|
}
|
|
sp = krb5_storage_from_fd(fd);
|
|
ret = krb5_store_int8(sp, 5);
|
|
if(ret) {
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
if(id->version == 0)
|
|
id->version = KRB5_KT_VNO;
|
|
ret = krb5_store_int8 (sp, id->version);
|
|
if (ret) {
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
storage_set_flags(context, sp, id->version);
|
|
} else {
|
|
int8_t pvno, tag;
|
|
sp = krb5_storage_from_fd(fd);
|
|
ret = krb5_ret_int8(sp, &pvno);
|
|
if(ret) {
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
if(pvno != 5) {
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
krb5_clear_error_string (context);
|
|
return KRB5_KEYTAB_BADVNO;
|
|
}
|
|
ret = krb5_ret_int8 (sp, &tag);
|
|
if (ret) {
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
id->version = tag;
|
|
storage_set_flags(context, sp, id->version);
|
|
}
|
|
|
|
{
|
|
krb5_storage *emem;
|
|
emem = krb5_storage_emem();
|
|
if(emem == NULL) {
|
|
ret = ENOMEM;
|
|
krb5_set_error_string (context, "malloc: out of memory");
|
|
goto out;
|
|
}
|
|
ret = krb5_kt_store_principal(context, emem, entry->principal);
|
|
if(ret) {
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_store_int32 (emem, entry->timestamp);
|
|
if(ret) {
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_store_int8 (emem, entry->vno);
|
|
if(ret) {
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_kt_store_keyblock (context, emem, &entry->keyblock);
|
|
if(ret) {
|
|
krb5_storage_free(emem);
|
|
goto out;
|
|
}
|
|
ret = krb5_storage_to_data(emem, &keytab);
|
|
krb5_storage_free(emem);
|
|
if(ret)
|
|
goto out;
|
|
}
|
|
|
|
while(1) {
|
|
ret = krb5_ret_int32(sp, &len);
|
|
if(ret == KRB5_CC_END) {
|
|
len = keytab.length;
|
|
break;
|
|
}
|
|
if(len < 0) {
|
|
len = -len;
|
|
if(len >= keytab.length) {
|
|
sp->seek(sp, -4, SEEK_CUR);
|
|
break;
|
|
}
|
|
}
|
|
sp->seek(sp, len, SEEK_CUR);
|
|
}
|
|
ret = krb5_store_int32(sp, len);
|
|
if(sp->store(sp, keytab.data, keytab.length) < 0)
|
|
ret = errno;
|
|
memset(keytab.data, 0, keytab.length);
|
|
krb5_data_free(&keytab);
|
|
out:
|
|
krb5_storage_free(sp);
|
|
close(fd);
|
|
return ret;
|
|
}
|
|
|
|
static krb5_error_code
|
|
fkt_remove_entry(krb5_context context,
|
|
krb5_keytab id,
|
|
krb5_keytab_entry *entry)
|
|
{
|
|
krb5_keytab_entry e;
|
|
krb5_kt_cursor cursor;
|
|
off_t pos_start, pos_end;
|
|
int found = 0;
|
|
|
|
fkt_start_seq_get_int(context, id, O_RDWR | O_BINARY, &cursor);
|
|
while(fkt_next_entry_int(context, id, &e, &cursor,
|
|
&pos_start, &pos_end) == 0) {
|
|
if(krb5_kt_compare(context, &e, entry->principal,
|
|
entry->vno, entry->keyblock.keytype)) {
|
|
int32_t len;
|
|
unsigned char buf[128];
|
|
found = 1;
|
|
cursor.sp->seek(cursor.sp, pos_start, SEEK_SET);
|
|
len = pos_end - pos_start - 4;
|
|
krb5_store_int32(cursor.sp, -len);
|
|
memset(buf, 0, sizeof(buf));
|
|
while(len > 0) {
|
|
cursor.sp->store(cursor.sp, buf, min(len, sizeof(buf)));
|
|
len -= min(len, sizeof(buf));
|
|
}
|
|
}
|
|
}
|
|
krb5_kt_end_seq_get(context, id, &cursor);
|
|
if (!found) {
|
|
krb5_clear_error_string (context);
|
|
return KRB5_KT_NOTFOUND;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
const krb5_kt_ops krb5_fkt_ops = {
|
|
"FILE",
|
|
fkt_resolve,
|
|
fkt_get_name,
|
|
fkt_close,
|
|
NULL, /* get */
|
|
fkt_start_seq_get,
|
|
fkt_next_entry,
|
|
fkt_end_seq_get,
|
|
fkt_add_entry,
|
|
fkt_remove_entry
|
|
};
|