1/* 2 Unix SMB/Netbios implementation. 3 Version 1.9. 4 SMB parameters and setup 5 Copyright (C) Andrew Tridgell 1992-2000 6 Copyright (C) Luke Kenneth Casson Leighton 1996-2000 7 Modified by Jeremy Allison 1995. 8 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003 9 Modified by Steve French (sfrench@us.ibm.com) 2002-2003 10 11 This program is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 2 of the License, or 14 (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software 23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24*/ 25 26#include <linux/module.h> 27#include <linux/slab.h> 28#include <linux/fs.h> 29#include <linux/string.h> 30#include <linux/kernel.h> 31#include <linux/random.h> 32#include "cifs_unicode.h" 33#include "cifspdu.h" 34#include "cifsglob.h" 35#include "md5.h" 36#include "cifs_debug.h" 37#include "cifsencrypt.h" 38 39#ifndef false 40#define false 0 41#endif 42#ifndef true 43#define true 1 44#endif 45 46/* following came from the other byteorder.h to avoid include conflicts */ 47#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) 48#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) 49#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val))) 50 51/*The following definitions come from libsmb/smbencrypt.c */ 52 53void SMBencrypt(unsigned char *passwd, const unsigned char *c8, 54 unsigned char *p24); 55void E_md4hash(const unsigned char *passwd, unsigned char *p16); 56static void SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, 57 unsigned char p24[24]); 58void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); 59 60/* 61 This implements the X/Open SMB password encryption 62 It takes a password, a 8 byte "crypt key" and puts 24 bytes of 63 encrypted password into p24 */ 64/* Note that password must be uppercased and null terminated */ 65void 66SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24) 67{ 68 unsigned char p14[15], p21[21]; 69 70 memset(p21, '\0', 21); 71 memset(p14, '\0', 14); 72 strncpy((char *) p14, (char *) passwd, 14); 73 74/* strupper((char *)p14); *//* BB at least uppercase the easy range */ 75 E_P16(p14, p21); 76 77 SMBOWFencrypt(p21, c8, p24); 78 79 memset(p14, 0, 15); 80 memset(p21, 0, 21); 81} 82 83/* Routines for Windows NT MD4 Hash functions. */ 84static int 85_my_wcslen(__u16 *str) 86{ 87 int len = 0; 88 while (*str++ != 0) 89 len++; 90 return len; 91} 92 93/* 94 * Convert a string into an NT UNICODE string. 95 * Note that regardless of processor type 96 * this must be in intel (little-endian) 97 * format. 98 */ 99 100static int 101_my_mbstowcs(__u16 *dst, const unsigned char *src, int len) 102{ /* BB not a very good conversion routine - change/fix */ 103 int i; 104 __u16 val; 105 106 for (i = 0; i < len; i++) { 107 val = *src; 108 SSVAL(dst, 0, val); 109 dst++; 110 src++; 111 if (val == 0) 112 break; 113 } 114 return i; 115} 116 117/* 118 * Creates the MD4 Hash of the users password in NT UNICODE. 119 */ 120 121void 122E_md4hash(const unsigned char *passwd, unsigned char *p16) 123{ 124 int len; 125 __u16 wpwd[129]; 126 127 /* Password cannot be longer than 128 characters */ 128 if (passwd) { 129 len = strlen((char *) passwd); 130 if (len > 128) 131 len = 128; 132 133 /* Password must be converted to NT unicode */ 134 _my_mbstowcs(wpwd, passwd, len); 135 } else 136 len = 0; 137 138 wpwd[len] = 0; /* Ensure string is null terminated */ 139 /* Calculate length in bytes */ 140 len = _my_wcslen(wpwd) * sizeof(__u16); 141 142 mdfour(p16, (unsigned char *) wpwd, len); 143 memset(wpwd, 0, 129 * 2); 144} 145 146 147/* Does the NTLMv2 owfs of a user's password */ 148 149/* Does the des encryption from the NT or LM MD4 hash. */ 150static void 151SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, 152 unsigned char p24[24]) 153{ 154 unsigned char p21[21]; 155 156 memset(p21, '\0', 21); 157 158 memcpy(p21, passwd, 16); 159 E_P24(p21, c8, p24); 160} 161 162/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */ 163 164/* Does the NT MD4 hash then des encryption. */ 165 166void 167SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) 168{ 169 unsigned char p21[21]; 170 171 memset(p21, '\0', 21); 172 173 E_md4hash(passwd, p21); 174 SMBOWFencrypt(p21, c8, p24); 175} 176 177 178/* Does the md5 encryption from the NT hash for NTLMv2. */ 179/* These routines will be needed later */ 180