smb_crypt.c revision 116189
175374Sbp/* 275374Sbp * Copyright (c) 2000-2001, Boris Popov 375374Sbp * All rights reserved. 475374Sbp * 575374Sbp * Redistribution and use in source and binary forms, with or without 675374Sbp * modification, are permitted provided that the following conditions 775374Sbp * are met: 875374Sbp * 1. Redistributions of source code must retain the above copyright 975374Sbp * notice, this list of conditions and the following disclaimer. 1075374Sbp * 2. Redistributions in binary form must reproduce the above copyright 1175374Sbp * notice, this list of conditions and the following disclaimer in the 1275374Sbp * documentation and/or other materials provided with the distribution. 1375374Sbp * 3. All advertising materials mentioning features or use of this software 1475374Sbp * must display the following acknowledgement: 1575374Sbp * This product includes software developed by Boris Popov. 1675374Sbp * 4. Neither the name of the author nor the names of any co-contributors 1775374Sbp * may be used to endorse or promote products derived from this software 1875374Sbp * without specific prior written permission. 1975374Sbp * 2075374Sbp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 2175374Sbp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2275374Sbp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2375374Sbp * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2475374Sbp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2575374Sbp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2675374Sbp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2775374Sbp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2875374Sbp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2975374Sbp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3075374Sbp * SUCH DAMAGE. 3175374Sbp */ 32116189Sobrien 33116189Sobrien#include <sys/cdefs.h> 34116189Sobrien__FBSDID("$FreeBSD: head/sys/netsmb/smb_crypt.c 116189 2003-06-11 05:37:42Z obrien $"); 35116189Sobrien 3675374Sbp#include <sys/param.h> 3775374Sbp#include <sys/malloc.h> 3875374Sbp#include <sys/kernel.h> 3975374Sbp#include <sys/systm.h> 4075374Sbp#include <sys/conf.h> 4175374Sbp#include <sys/proc.h> 4275374Sbp#include <sys/fcntl.h> 4375374Sbp#include <sys/socket.h> 4475374Sbp#include <sys/socketvar.h> 4575374Sbp#include <sys/sysctl.h> 4675374Sbp 4775374Sbp#include <sys/md4.h> 4875374Sbp#include <sys/iconv.h> 4975374Sbp 5075374Sbp#include <netsmb/smb.h> 5175374Sbp#include <netsmb/smb_conn.h> 5275374Sbp#include <netsmb/smb_subr.h> 5375374Sbp#include <netsmb/smb_dev.h> 5475374Sbp 5575374Sbp#include "opt_netsmb.h" 5675374Sbp 5775374Sbp#ifdef NETSMBCRYPTO 5875374Sbp 5975374Sbp#include <crypto/des/des.h> 6075374Sbp 6175374Sbpstatic u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25}; 6275374Sbp 6375374Sbp 6475374Sbpstatic void 6575374Sbpsmb_E(const u_char *key, u_char *data, u_char *dest) 6675374Sbp{ 6775374Sbp des_key_schedule *ksp; 6875374Sbp u_char kk[8]; 6975374Sbp 7075374Sbp kk[0] = key[0] & 0xfe; 7175374Sbp kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe); 7275374Sbp kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe); 7375374Sbp kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe); 7475374Sbp kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe); 7575374Sbp kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe); 7675374Sbp kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe); 7775374Sbp kk[7] = key[6] << 1; 78111119Simp ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK); 7978064Sume des_set_key((des_cblock *)kk, *ksp); 8078064Sume des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1); 8175374Sbp free(ksp, M_SMBTEMP); 8275374Sbp} 8375374Sbp#endif 8475374Sbp 8575374Sbp 8675374Sbpint 8775374Sbpsmb_encrypt(const u_char *apwd, u_char *C8, u_char *RN) 8875374Sbp{ 8975374Sbp#ifdef NETSMBCRYPTO 9075374Sbp u_char *p, *P14, *S21; 9175374Sbp 92111119Simp p = malloc(14 + 21, M_SMBTEMP, M_WAITOK); 9375374Sbp bzero(p, 14 + 21); 9475374Sbp P14 = p; 9575374Sbp S21 = p + 14; 9675374Sbp bcopy(apwd, P14, min(14, strlen(apwd))); 9775374Sbp /* 9875374Sbp * S21 = concat(Ex(P14, N8), zeros(5)); 9975374Sbp */ 10075374Sbp smb_E(P14, N8, S21); 10175374Sbp smb_E(P14 + 7, N8, S21 + 8); 10275374Sbp 10375374Sbp smb_E(S21, C8, RN); 10475374Sbp smb_E(S21 + 7, C8, RN + 8); 10575374Sbp smb_E(S21 + 14, C8, RN + 16); 10675374Sbp free(p, M_SMBTEMP); 10775374Sbp return 0; 10875374Sbp#else 10975374Sbp SMBERROR("password encryption is not available\n"); 11075374Sbp bzero(RN, 24); 11175374Sbp return EAUTH; 11275374Sbp#endif 11375374Sbp} 11475374Sbp 11575374Sbpint 11675374Sbpsmb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN) 11775374Sbp{ 11875374Sbp#ifdef NETSMBCRYPTO 11975374Sbp u_char S21[21]; 12075374Sbp u_int16_t *unipwd; 12175374Sbp MD4_CTX *ctxp; 12275374Sbp int len; 12375374Sbp 12475374Sbp len = strlen(apwd); 125111119Simp unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); 12675374Sbp /* 12775374Sbp * S21 = concat(MD4(U(apwd)), zeros(5)); 12875374Sbp */ 12975374Sbp smb_strtouni(unipwd, apwd); 130111119Simp ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK); 13175374Sbp MD4Init(ctxp); 13275374Sbp MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t)); 13375374Sbp free(unipwd, M_SMBTEMP); 13475374Sbp bzero(S21, 21); 13575374Sbp MD4Final(S21, ctxp); 13675374Sbp free(ctxp, M_SMBTEMP); 13775374Sbp 13875374Sbp smb_E(S21, C8, RN); 13975374Sbp smb_E(S21 + 7, C8, RN + 8); 14075374Sbp smb_E(S21 + 14, C8, RN + 16); 14175374Sbp return 0; 14275374Sbp#else 14375374Sbp SMBERROR("password encryption is not available\n"); 14475374Sbp bzero(RN, 24); 14575374Sbp return EAUTH; 14675374Sbp#endif 14775374Sbp} 14875374Sbp 149