GSS-API backend for the unified security framework.
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4673 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
305
appl/ftp/ftp/gssapi.c
Normal file
305
appl/ftp/ftp/gssapi.c
Normal file
@@ -0,0 +1,305 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 1998 Kungliga Tekniska H<>gskolan
|
||||||
|
* (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. All advertising materials mentioning features or use of this software
|
||||||
|
* must display the following acknowledgement:
|
||||||
|
* This product includes software developed by Kungliga Tekniska
|
||||||
|
* H<>gskolan and its contributors.
|
||||||
|
*
|
||||||
|
* 4. 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifdef FTP_SERVER
|
||||||
|
#include "ftpd_locl.h"
|
||||||
|
#else
|
||||||
|
#include "ftp_locl.h"
|
||||||
|
#endif
|
||||||
|
#include <gssapi.h>
|
||||||
|
|
||||||
|
RCSID("$Id$");
|
||||||
|
|
||||||
|
struct gss_data {
|
||||||
|
gss_ctx_id_t context_hdl;
|
||||||
|
};
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_init(void *app_data)
|
||||||
|
{
|
||||||
|
struct gss_data *d = app_data;
|
||||||
|
d->context_hdl = GSS_C_NO_CONTEXT;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_check_prot(void *app_data, int level)
|
||||||
|
{
|
||||||
|
if(level == prot_confidential)
|
||||||
|
return -1;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_decode(void *app_data, void *buf, int len, int level)
|
||||||
|
{
|
||||||
|
OM_uint32 maj_stat, min_stat;
|
||||||
|
gss_buffer_desc input, output;
|
||||||
|
gss_qop_t qop_state;
|
||||||
|
int conf_state;
|
||||||
|
struct gss_data *d = app_data;
|
||||||
|
|
||||||
|
input.length = len;
|
||||||
|
input.value = buf;
|
||||||
|
maj_stat = gss_unwrap (&min_stat,
|
||||||
|
d->context_hdl,
|
||||||
|
&input,
|
||||||
|
&output,
|
||||||
|
&conf_state,
|
||||||
|
&qop_state);
|
||||||
|
if(GSS_ERROR(maj_stat)) {
|
||||||
|
printf("Error unwrapping GSS packet: %x, %d, len = %d.\n",
|
||||||
|
maj_stat, min_stat, len);
|
||||||
|
abort();
|
||||||
|
}
|
||||||
|
memmove(buf, output.value, output.length);
|
||||||
|
return output.length;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_overhead(void *app_data, int level, int len)
|
||||||
|
{
|
||||||
|
return 100; /* dunno? */
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_encode(void *app_data, void *from, int length, int level, void **to)
|
||||||
|
{
|
||||||
|
OM_uint32 maj_stat, min_stat;
|
||||||
|
gss_buffer_desc input, output;
|
||||||
|
int conf_state;
|
||||||
|
struct gss_data *d = app_data;
|
||||||
|
|
||||||
|
input.length = length;
|
||||||
|
input.value = from;
|
||||||
|
maj_stat = gss_wrap (&min_stat,
|
||||||
|
d->context_hdl,
|
||||||
|
level == prot_private,
|
||||||
|
GSS_C_QOP_DEFAULT,
|
||||||
|
&input,
|
||||||
|
&conf_state,
|
||||||
|
&output);
|
||||||
|
*to = output.value;
|
||||||
|
return output.length;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* end common stuff */
|
||||||
|
|
||||||
|
#ifdef FTP_SERVER
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_adat(void *app_data, void *buf, size_t len)
|
||||||
|
{
|
||||||
|
char *p = NULL;
|
||||||
|
gss_buffer_desc input_token, output_token;
|
||||||
|
OM_uint32 maj_stat, min_stat;
|
||||||
|
gss_name_t client_name;
|
||||||
|
struct gss_data *d = app_data;
|
||||||
|
|
||||||
|
gss_channel_bindings_t bindings = malloc(sizeof(*bindings));
|
||||||
|
bindings->initiator_addrtype = GSS_C_AF_INET;
|
||||||
|
bindings->initiator_address.length = 4;
|
||||||
|
bindings->initiator_address.value = &his_addr.sin_addr;
|
||||||
|
bindings->acceptor_addrtype = GSS_C_AF_INET;
|
||||||
|
bindings->acceptor_address.length = 4;
|
||||||
|
bindings->acceptor_address.value = &ctrl_addr.sin_addr;
|
||||||
|
bindings->application_data.length = 0;
|
||||||
|
bindings->application_data.value = NULL;
|
||||||
|
|
||||||
|
input_token.value = buf;
|
||||||
|
input_token.length = len;
|
||||||
|
|
||||||
|
maj_stat = gss_accept_sec_context (&min_stat,
|
||||||
|
&d->context_hdl,
|
||||||
|
GSS_C_NO_CREDENTIAL,
|
||||||
|
&input_token,
|
||||||
|
bindings,
|
||||||
|
&client_name,
|
||||||
|
NULL,
|
||||||
|
&output_token,
|
||||||
|
NULL,
|
||||||
|
NULL,
|
||||||
|
NULL);
|
||||||
|
|
||||||
|
if(output_token.length) {
|
||||||
|
if(base64_encode(output_token.value, output_token.length, &p) < 0) {
|
||||||
|
reply(535, "Out of memory base64-encoding.");
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(maj_stat == GSS_S_COMPLETE){
|
||||||
|
if(p)
|
||||||
|
reply(235, "ADAT=%s", p);
|
||||||
|
else
|
||||||
|
reply(235, "ADAT Complete");
|
||||||
|
sec_complete = 1;
|
||||||
|
} else if(maj_stat == GSS_S_CONTINUE_NEEDED)
|
||||||
|
if(p)
|
||||||
|
reply(335, "ADAT=%s", p);
|
||||||
|
else
|
||||||
|
reply(335, "OK, need more data");
|
||||||
|
else
|
||||||
|
reply(535, "foo?");
|
||||||
|
free(p);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_userok()
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct sec_server_mech gss_server_mech = {
|
||||||
|
"GSSAPI",
|
||||||
|
sizeof(struct gss_data),
|
||||||
|
gss_init, /* init */
|
||||||
|
NULL, /* end */
|
||||||
|
gss_check_prot,
|
||||||
|
gss_overhead,
|
||||||
|
gss_encode,
|
||||||
|
gss_decode,
|
||||||
|
/* */
|
||||||
|
NULL,
|
||||||
|
gss_adat,
|
||||||
|
NULL, /* pbsz */
|
||||||
|
NULL, /* ccc */
|
||||||
|
gss_userok
|
||||||
|
};
|
||||||
|
|
||||||
|
#else
|
||||||
|
|
||||||
|
extern struct sockaddr_in hisctladdr, myctladdr;
|
||||||
|
|
||||||
|
static int
|
||||||
|
gss_auth(void *app_data, char *host)
|
||||||
|
{
|
||||||
|
|
||||||
|
OM_uint32 maj_stat, min_stat;
|
||||||
|
gss_buffer_desc name;
|
||||||
|
gss_name_t target_name;
|
||||||
|
gss_buffer_desc input, output_token;
|
||||||
|
int context_established = 0;
|
||||||
|
char *p;
|
||||||
|
int n;
|
||||||
|
gss_channel_bindings_t bindings;
|
||||||
|
struct gss_data *d = app_data;
|
||||||
|
|
||||||
|
name.length = asprintf((char**)&name.value, "ftp@%s", host);
|
||||||
|
maj_stat = gss_import_name(&min_stat,
|
||||||
|
&name,
|
||||||
|
GSS_C_NT_HOSTBASED_SERVICE,
|
||||||
|
&target_name);
|
||||||
|
free(name.value);
|
||||||
|
|
||||||
|
|
||||||
|
input.length = 0;
|
||||||
|
input.value = NULL;
|
||||||
|
|
||||||
|
bindings = malloc(sizeof(*bindings));
|
||||||
|
bindings->initiator_addrtype = GSS_C_AF_INET;
|
||||||
|
bindings->initiator_address.length = 4;
|
||||||
|
bindings->initiator_address.value = &hisctladdr.sin_addr;
|
||||||
|
bindings->acceptor_addrtype = GSS_C_AF_INET;
|
||||||
|
bindings->acceptor_address.length = 4;
|
||||||
|
bindings->acceptor_address.value = &myctladdr.sin_addr;
|
||||||
|
bindings->application_data.length = 0;
|
||||||
|
bindings->application_data.value = NULL;
|
||||||
|
|
||||||
|
while(!context_established) {
|
||||||
|
maj_stat = gss_init_sec_context(&min_stat,
|
||||||
|
GSS_C_NO_CREDENTIAL,
|
||||||
|
&d->context_hdl,
|
||||||
|
target_name,
|
||||||
|
GSS_C_NO_OID,
|
||||||
|
GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG,
|
||||||
|
0,
|
||||||
|
bindings,
|
||||||
|
&input,
|
||||||
|
NULL,
|
||||||
|
&output_token,
|
||||||
|
NULL,
|
||||||
|
NULL);
|
||||||
|
if (GSS_ERROR(maj_stat))
|
||||||
|
abort ();
|
||||||
|
gss_release_buffer(&min_stat, &input);
|
||||||
|
if (output_token.length != 0) {
|
||||||
|
base64_encode(output_token.value, output_token.length, &p);
|
||||||
|
gss_release_buffer(&min_stat, &output_token);
|
||||||
|
n = command("ADAT %s", p);
|
||||||
|
free(p);
|
||||||
|
}
|
||||||
|
if (GSS_ERROR(maj_stat)) {
|
||||||
|
if (d->context_hdl != GSS_C_NO_CONTEXT)
|
||||||
|
gss_delete_sec_context (&min_stat,
|
||||||
|
&d->context_hdl,
|
||||||
|
GSS_C_NO_BUFFER);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
if (maj_stat & GSS_S_CONTINUE_NEEDED) {
|
||||||
|
p = strstr(reply_string, "ADAT=");
|
||||||
|
if(p == NULL){
|
||||||
|
abort();
|
||||||
|
} else {
|
||||||
|
p+=5;
|
||||||
|
input.value = malloc(strlen(p));
|
||||||
|
input.length = base64_decode(p, input.value);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if(code != 235)
|
||||||
|
abort();
|
||||||
|
context_established = 1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
struct sec_client_mech gss_client_mech = {
|
||||||
|
"GSSAPI",
|
||||||
|
sizeof(struct gss_data),
|
||||||
|
gss_init,
|
||||||
|
gss_auth,
|
||||||
|
NULL, /* end */
|
||||||
|
gss_check_prot,
|
||||||
|
gss_overhead,
|
||||||
|
gss_encode,
|
||||||
|
gss_decode,
|
||||||
|
};
|
||||||
|
|
||||||
|
#endif
|
||||||
Reference in New Issue
Block a user