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/*
* Copyright (c) 1999, Boris Popov
* 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 Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <netncp/ncp.h>
#include <netncp/ncp_conn.h>
#include <netncp/ncp_subr.h>
#include <netncp/ncp_ncp.h>
#include <netncp/ncp_rq.h>
#include <netncp/ncp_nls.h>
#include <netncp/nwerror.h>
static int ncp_login_encrypted(struct ncp_conn *conn, struct ncp_bindery_object *object,
unsigned char *key, unsigned char *passwd,
struct proc *p, struct ucred *cred);
static int ncp_login_unencrypted(struct ncp_conn *conn, u_int16_t object_type,
char *object_name, unsigned char *passwd,
struct proc *p, struct ucred *cred);
static int ncp_sign_start(struct ncp_conn *conn, char *logindata);
static int ncp_get_encryption_key(struct ncp_conn *conn, char *target);
/*
* Initialize packet signatures. They a slightly modified MD4.
* The first 16 bytes of logindata are the shuffled password,
* the last 8 bytes the encryption key as received from the server.
*/
int
ncp_sign_start(struct ncp_conn *conn, char *logindata) {
char msg[64];
u_int32_t state[4];
memcpy(msg, logindata, 24);
memcpy(msg + 24, "Authorized NetWare Client", 25);
bzero(msg + 24 + 25, sizeof(msg) - 24 - 25);
conn->sign_state[0] = 0x67452301;
conn->sign_state[1] = 0xefcdab89;
conn->sign_state[2] = 0x98badcfe;
conn->sign_state[3] = 0x10325476;
ncp_sign(conn->sign_state, msg, state);
conn->sign_root[0] = state[0];
conn->sign_root[1] = state[1];
conn->flags |= NCPFL_SIGNACTIVE;
return 0;
}
/*
* target is a 8-byte buffer
*/
int
ncp_get_encryption_key(struct ncp_conn *conn, char *target) {
int error;
DECLARE_RQ;
NCP_RQ_HEAD_S(23,23,conn->procp,conn->ucred);
checkbad(ncp_request(conn,rqp));
if (rqp->rpsize < 8) {
NCPFATAL("rpsize=%d < 8\n", rqp->rpsize);
return EIO;
}
ncp_rp_mem(rqp, target, 8);
NCP_RQ_EXIT;
return error;
}
int
ncp_login_object(struct ncp_conn *conn, unsigned char *username,
int login_type, unsigned char *password,
struct proc *p,struct ucred *cred)
{
int error;
unsigned char ncp_key[8];
struct ncp_bindery_object user;
if ((error = ncp_get_encryption_key(conn, ncp_key)) != 0) {
printf("%s: Warning: use unencrypted login\n", __FUNCTION__);
return ncp_login_unencrypted(conn, login_type, username, password,p,cred);
}
if ((error = ncp_get_bindery_object_id(conn, login_type, username, &user,p,cred)) != 0) {
return error;
}
error = ncp_login_encrypted(conn, &user, ncp_key, password,p,cred);
return error;
}
int
ncp_login_encrypted(struct ncp_conn *conn, struct ncp_bindery_object *object,
unsigned char *key, unsigned char *passwd,
struct proc *p,struct ucred *cred) {
u_int32_t tmpID = htonl(object->object_id);
u_char buf[16 + 8];
u_char encrypted[8];
int error;
DECLARE_RQ;
nw_keyhash((u_char*)&tmpID, passwd, strlen(passwd), buf);
nw_encrypt(key, buf, encrypted);
NCP_RQ_HEAD_S(23,24,p,cred);
ncp_rq_mem(rqp, encrypted, 8);
ncp_rq_word_hl(rqp, object->object_type);
ncp_rq_pstring(rqp, object->object_name);
error = ncp_request(conn, rqp);
NCP_RQ_EXIT_NB;
if (conn->flags & NCPFL_SIGNWANTED) {
if (error == 0 || error == NWE_PASSWORD_EXPIRED) {
memcpy(buf + 16, key, 8);
error = ncp_sign_start(conn, buf);
}
}
return error;
}
int
ncp_login_unencrypted(struct ncp_conn *conn, u_int16_t object_type,
char *object_name, unsigned char *passwd,
struct proc *p, struct ucred *cred)
{
int error;
DECLARE_RQ;
NCP_RQ_HEAD_S(23,20,conn->procp,conn->ucred);
ncp_rq_word_hl(rqp, object_type);
ncp_rq_pstring(rqp, object_name);
ncp_rq_pstring(rqp, passwd);
error = ncp_request(conn,rqp);
NCP_RQ_EXIT_NB;
return error;
}
/*
* Login to specified server with username and password.
* conn should be locked.
*/
int
ncp_login(struct ncp_conn *conn, char *user, int objtype, char *password,
struct proc *p, struct ucred *cred) {
int error;
if (ncp_suser(cred) != 0 && cred->cr_uid != conn->nc_owner->cr_uid)
return EACCES;
if (conn->flags & NCPFL_LOGGED) return EALREADY;
if ((conn->flags & NCPFL_ATTACHED) == 0) return ENOTCONN;
conn->li.user = ncp_str_dup(user);
conn->li.password = ncp_str_dup(password);
if (conn->li.user == NULL || conn->li.password == NULL) {
error = EINVAL;
goto bad;
}
ncp_str_upper(conn->li.user);
if ((conn->li.opt & NCP_OPT_NOUPCASEPASS) == 0)
ncp_str_upper(conn->li.password);
checkbad(ncp_login_object(conn, conn->li.user, objtype, conn->li.password,p,cred));
conn->li.objtype = objtype;
conn->flags |= NCPFL_LOGGED;
return 0;
bad:
if (conn->li.user) free(conn->li.user, M_NCPDATA);
if (conn->li.password) free(conn->li.password, M_NCPDATA);
conn->li.user = conn->li.password = NULL;
return error;
}
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