mirror of git://anongit.mindrot.org/openssh.git
- (djm) Pull in auth-krb5.c from OpenBSD CVS. NB. it is not currently used.
This commit is contained in:
Damien Miller
parent
d4d119377d
commit
964fed54cd
|
|
@ -1,3 +1,6 @@
|
||||||
|
20010925
|
||||||
|
- (djm) Pull in auth-krb5.c from OpenBSD CVS. NB. it is not currently used.
|
||||||
|
|
||||||
20010923
|
20010923
|
||||||
- (bal) updated ssh.c to mirror minor getopts 'extern int' formating done
|
- (bal) updated ssh.c to mirror minor getopts 'extern int' formating done
|
||||||
by stevesk@
|
by stevesk@
|
||||||
|
|
@ -6563,4 +6566,4 @@
|
||||||
- Wrote replacements for strlcpy and mkdtemp
|
- Wrote replacements for strlcpy and mkdtemp
|
||||||
- Released 1.0pre1
|
- Released 1.0pre1
|
||||||
|
|
||||||
$Id: ChangeLog,v 1.1559 2001/09/24 23:15:15 mouring Exp $
|
$Id: ChangeLog,v 1.1560 2001/09/25 02:58:23 djm Exp $
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,259 @@
|
||||||
|
/*
|
||||||
|
* Kerberos v5 authentication and ticket-passing routines.
|
||||||
|
*
|
||||||
|
* $FreeBSD: src/crypto/openssh/auth-krb5.c,v 1.6 2001/02/13 16:58:04 assar Exp $
|
||||||
|
* $OpenBSD: auth-krb5.c,v 1.1 2001/06/26 16:15:23 dugsong Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "includes.h"
|
||||||
|
#include "ssh.h"
|
||||||
|
#include "ssh1.h"
|
||||||
|
#include "packet.h"
|
||||||
|
#include "xmalloc.h"
|
||||||
|
#include "log.h"
|
||||||
|
#include "servconf.h"
|
||||||
|
#include "uidswap.h"
|
||||||
|
#include "auth.h"
|
||||||
|
|
||||||
|
#ifdef KRB5
|
||||||
|
#include <krb5.h>
|
||||||
|
|
||||||
|
extern ServerOptions options;
|
||||||
|
|
||||||
|
static int
|
||||||
|
krb5_init(void *context)
|
||||||
|
{
|
||||||
|
Authctxt *authctxt = (Authctxt *)context;
|
||||||
|
krb5_error_code problem;
|
||||||
|
static int cleanup_registered = 0;
|
||||||
|
|
||||||
|
if (authctxt->krb5_ctx == NULL) {
|
||||||
|
problem = krb5_init_context(&authctxt->krb5_ctx);
|
||||||
|
if (problem)
|
||||||
|
return (problem);
|
||||||
|
krb5_init_ets(authctxt->krb5_ctx);
|
||||||
|
}
|
||||||
|
if (!cleanup_registered) {
|
||||||
|
fatal_add_cleanup(krb5_cleanup_proc, authctxt);
|
||||||
|
cleanup_registered = 1;
|
||||||
|
}
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Try krb5 authentication. server_user is passed for logging purposes
|
||||||
|
* only, in auth is received ticket, in client is returned principal
|
||||||
|
* from the ticket
|
||||||
|
*/
|
||||||
|
int
|
||||||
|
auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client)
|
||||||
|
{
|
||||||
|
krb5_error_code problem;
|
||||||
|
krb5_principal server;
|
||||||
|
krb5_data reply;
|
||||||
|
krb5_ticket *ticket;
|
||||||
|
int fd;
|
||||||
|
|
||||||
|
server = NULL;
|
||||||
|
ticket = NULL;
|
||||||
|
reply.length = 0;
|
||||||
|
|
||||||
|
problem = krb5_init(authctxt);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
problem = krb5_auth_con_init(authctxt->krb5_ctx,
|
||||||
|
&authctxt->krb5_auth_ctx);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
fd = packet_get_connection_in();
|
||||||
|
problem = krb5_auth_con_setaddrs_from_fd(authctxt->krb5_ctx,
|
||||||
|
authctxt->krb5_auth_ctx, &fd);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
problem = krb5_sname_to_principal(authctxt->krb5_ctx, NULL, NULL ,
|
||||||
|
KRB5_NT_SRV_HST, &server);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
problem = krb5_rd_req(authctxt->krb5_ctx, &authctxt->krb5_auth_ctx,
|
||||||
|
auth, server, NULL, NULL, &ticket);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
problem = krb5_copy_principal(authctxt->krb5_ctx, ticket->client,
|
||||||
|
&authctxt->krb5_user);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
/* if client wants mutual auth */
|
||||||
|
problem = krb5_mk_rep(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
|
||||||
|
&reply);
|
||||||
|
if (problem)
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
/* Check .k5login authorization now. */
|
||||||
|
if (!krb5_kuserok(authctxt->krb5_ctx, authctxt->krb5_user,
|
||||||
|
authctxt->pw->pw_name))
|
||||||
|
goto err;
|
||||||
|
|
||||||
|
if (client)
|
||||||
|
krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user,
|
||||||
|
client);
|
||||||
|
|
||||||
|
packet_start(SSH_SMSG_AUTH_KERBEROS_RESPONSE);
|
||||||
|
packet_put_string((char *) reply.data, reply.length);
|
||||||
|
packet_send();
|
||||||
|
packet_write_wait();
|
||||||
|
|
||||||
|
err:
|
||||||
|
if (server)
|
||||||
|
krb5_free_principal(authctxt->krb5_ctx, server);
|
||||||
|
if (ticket)
|
||||||
|
krb5_free_ticket(authctxt->krb5_ctx, ticket);
|
||||||
|
if (reply.length)
|
||||||
|
xfree(reply.data);
|
||||||
|
|
||||||
|
if (problem) {
|
||||||
|
debug("Kerberos v5 authentication failed: %s",
|
||||||
|
krb5_get_err_text(authctxt->krb5_ctx, problem));
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
return (1);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt)
|
||||||
|
{
|
||||||
|
krb5_error_code problem;
|
||||||
|
krb5_ccache ccache = NULL;
|
||||||
|
char *pname;
|
||||||
|
|
||||||
|
if (authctxt->pw == NULL || authctxt->krb5_user == NULL)
|
||||||
|
return (0);
|
||||||
|
|
||||||
|
temporarily_use_uid(authctxt->pw);
|
||||||
|
|
||||||
|
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops, &ccache);
|
||||||
|
if (problem)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
problem = krb5_cc_initialize(authctxt->krb5_ctx, ccache,
|
||||||
|
authctxt->krb5_user);
|
||||||
|
if (problem)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
problem = krb5_rd_cred2(authctxt->krb5_ctx, authctxt->krb5_auth_ctx,
|
||||||
|
ccache, tgt);
|
||||||
|
if (problem)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
authctxt->krb5_fwd_ccache = ccache;
|
||||||
|
ccache = NULL;
|
||||||
|
|
||||||
|
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
|
||||||
|
|
||||||
|
problem = krb5_unparse_name(authctxt->krb5_ctx, authctxt->krb5_user,
|
||||||
|
&pname);
|
||||||
|
if (problem)
|
||||||
|
goto fail;
|
||||||
|
|
||||||
|
debug("Kerberos v5 TGT accepted (%s)", pname);
|
||||||
|
|
||||||
|
restore_uid();
|
||||||
|
|
||||||
|
return (1);
|
||||||
|
|
||||||
|
fail:
|
||||||
|
if (problem)
|
||||||
|
debug("Kerberos v5 TGT passing failed: %s",
|
||||||
|
krb5_get_err_text(authctxt->krb5_ctx, problem));
|
||||||
|
if (ccache)
|
||||||
|
krb5_cc_destroy(authctxt->krb5_ctx, ccache);
|
||||||
|
|
||||||
|
restore_uid();
|
||||||
|
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
|
||||||
|
int
|
||||||
|
auth_krb5_password(Authctxt *authctxt, const char *password)
|
||||||
|
{
|
||||||
|
krb5_error_code problem;
|
||||||
|
|
||||||
|
if (authctxt->pw == NULL)
|
||||||
|
return (0);
|
||||||
|
|
||||||
|
temporarily_use_uid(authctxt->pw);
|
||||||
|
|
||||||
|
problem = krb5_init(authctxt);
|
||||||
|
if (problem)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
problem = krb5_parse_name(authctxt->krb5_ctx, authctxt->pw->pw_name,
|
||||||
|
&authctxt->krb5_user);
|
||||||
|
if (problem)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_mcc_ops,
|
||||||
|
&authctxt->krb5_fwd_ccache);
|
||||||
|
if (problem)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
problem = krb5_cc_initialize(authctxt->krb5_ctx,
|
||||||
|
authctxt->krb5_fwd_ccache, authctxt->krb5_user);
|
||||||
|
if (problem)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
problem = krb5_verify_user(authctxt->krb5_ctx, authctxt->krb5_user,
|
||||||
|
authctxt->krb5_fwd_ccache, password, 1, NULL);
|
||||||
|
if (problem)
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
|
||||||
|
|
||||||
|
out:
|
||||||
|
restore_uid();
|
||||||
|
|
||||||
|
if (problem) {
|
||||||
|
debug("Kerberos password authentication failed: %s",
|
||||||
|
krb5_get_err_text(authctxt->krb5_ctx, problem));
|
||||||
|
|
||||||
|
krb5_cleanup_proc(authctxt);
|
||||||
|
|
||||||
|
if (options.kerberos_or_local_passwd)
|
||||||
|
return (-1);
|
||||||
|
else
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
return (1);
|
||||||
|
}
|
||||||
|
|
||||||
|
void
|
||||||
|
krb5_cleanup_proc(void *context)
|
||||||
|
{
|
||||||
|
Authctxt *authctxt = (Authctxt *)context;
|
||||||
|
|
||||||
|
debug("krb5_cleanup_proc called");
|
||||||
|
if (authctxt->krb5_fwd_ccache) {
|
||||||
|
krb5_cc_destroy(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
|
||||||
|
authctxt->krb5_fwd_ccache = NULL;
|
||||||
|
}
|
||||||
|
if (authctxt->krb5_user) {
|
||||||
|
krb5_free_principal(authctxt->krb5_ctx, authctxt->krb5_user);
|
||||||
|
authctxt->krb5_user = NULL;
|
||||||
|
}
|
||||||
|
if (authctxt->krb5_auth_ctx) {
|
||||||
|
krb5_auth_con_free(authctxt->krb5_ctx,
|
||||||
|
authctxt->krb5_auth_ctx);
|
||||||
|
authctxt->krb5_auth_ctx = NULL;
|
||||||
|
}
|
||||||
|
if (authctxt->krb5_ctx) {
|
||||||
|
krb5_free_context(authctxt->krb5_ctx);
|
||||||
|
authctxt->krb5_ctx = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif /* KRB5 */
|
||||||
Loading…
Reference in New Issue