/*
* Copyright (c) 2000-2001, 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/malloc.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/sysctl.h>
#include <sys/md4.h>
#include <sys/iconv.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>
#include "opt_netsmb.h"
#ifdef NETSMBCRYPTO
#include <crypto/des/des.h>
static u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
static void
smb_E(const u_char *key, u_char *data, u_char *dest)
{
des_key_schedule *ksp;
u_char kk[8];
kk[0] = key[0] & 0xfe;
kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe);
kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe);
kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe);
kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe);
kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe);
kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe);
kk[7] = key[6] << 1;
ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK);
des_set_key((des_cblock *)kk, *ksp);
des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1);
free(ksp, M_SMBTEMP);
}
#endif
int
smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN)
{
#ifdef NETSMBCRYPTO
u_char *p, *P14, *S21;
p = malloc(14 + 21, M_SMBTEMP, M_WAITOK);
bzero(p, 14 + 21);
P14 = p;
S21 = p + 14;
bcopy(apwd, P14, min(14, strlen(apwd)));
/*
* S21 = concat(Ex(P14, N8), zeros(5));
*/
smb_E(P14, N8, S21);
smb_E(P14 + 7, N8, S21 + 8);
smb_E(S21, C8, RN);
smb_E(S21 + 7, C8, RN + 8);
smb_E(S21 + 14, C8, RN + 16);
free(p, M_SMBTEMP);
return 0;
#else
SMBERROR("password encryption is not available\n");
bzero(RN, 24);
return EAUTH;
#endif
}
int
smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
{
#ifdef NETSMBCRYPTO
u_char S21[21];
u_int16_t *unipwd;
MD4_CTX *ctxp;
int len;
len = strlen(apwd);
unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
/*
* S21 = concat(MD4(U(apwd)), zeros(5));
*/
smb_strtouni(unipwd, apwd);
ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK);
MD4Init(ctxp);
MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t));
free(unipwd, M_SMBTEMP);
bzero(S21, 21);
MD4Final(S21, ctxp);
free(ctxp, M_SMBTEMP);
smb_E(S21, C8, RN);
smb_E(S21 + 7, C8, RN + 8);
smb_E(S21 + 14, C8, RN + 16);
return 0;
#else
SMBERROR("password encryption is not available\n");
bzero(RN, 24);
return EAUTH;
#endif
}
