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/fs.h> 28#include <linux/string.h> 29#include <linux/kernel.h> 30#include <linux/random.h> 31#include "cifs_unicode.h" 32#include "cifspdu.h" 33#include "cifsglob.h" 34#include "md5.h" 35#include "cifs_debug.h" 36#include "cifsencrypt.h" 37 38#ifndef FALSE 39#define FALSE 0 40#endif 41#ifndef TRUE 42#define TRUE 1 43#endif 44 45/* following came from the other byteorder.h to avoid include conflicts */ 46#define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) 47#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) 48#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val))) 49 50/*The following definitions come from libsmb/smbencrypt.c */ 51 52void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); 53void E_md4hash(const unsigned char *passwd, unsigned char *p16); 54static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, 55 unsigned char p24[24]); 56void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); 57 58/* 59 This implements the X/Open SMB password encryption 60 It takes a password, a 8 byte "crypt key" and puts 24 bytes of 61 encrypted password into p24 */ 62/* Note that password must be uppercased and null terminated */ 63void 64SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) 65{ 66 unsigned char p14[15], p21[21]; 67 68 memset(p21, '\0', 21); 69 memset(p14, '\0', 14); 70 strncpy((char *) p14, (char *) passwd, 14); 71 72/* strupper((char *)p14); *//* BB at least uppercase the easy range */ 73 E_P16(p14, p21); 74 75 SMBOWFencrypt(p21, c8, p24); 76 77 memset(p14,0,15); 78 memset(p21,0,21); 79} 80 81/* Routines for Windows NT MD4 Hash functions. */ 82static int 83_my_wcslen(__u16 * str) 84{ 85 int len = 0; 86 while (*str++ != 0) 87 len++; 88 return len; 89} 90 91/* 92 * Convert a string into an NT UNICODE string. 93 * Note that regardless of processor type 94 * this must be in intel (little-endian) 95 * format. 96 */ 97 98static int 99_my_mbstowcs(__u16 * dst, const unsigned char *src, int len) 100{ /* not a very good conversion routine - change/fix */ 101 int i; 102 __u16 val; 103 104 for (i = 0; i < len; i++) { 105 val = *src; 106 SSVAL(dst, 0, val); 107 dst++; 108 src++; 109 if (val == 0) 110 break; 111 } 112 return i; 113} 114 115/* 116 * Creates the MD4 Hash of the users password in NT UNICODE. 117 */ 118 119void 120E_md4hash(const unsigned char *passwd, unsigned char *p16) 121{ 122 int len; 123 __u16 wpwd[129]; 124 125 /* Password cannot be longer than 128 characters */ 126 if(passwd) { 127 len = strlen((char *) passwd); 128 if (len > 128) { 129 len = 128; 130 } 131 /* Password must be converted to NT unicode */ 132 _my_mbstowcs(wpwd, passwd, len); 133 } else 134 len = 0; 135 136 wpwd[len] = 0; /* Ensure string is null terminated */ 137 /* Calculate length in bytes */ 138 len = _my_wcslen(wpwd) * sizeof (__u16); 139 140 mdfour(p16, (unsigned char *) wpwd, len); 141 memset(wpwd,0,129 * 2); 142} 143 144 145/* Does the NTLMv2 owfs of a user's password */ 146 147/* Does the des encryption from the NT or LM MD4 hash. */ 148static void 149SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, 150 unsigned char p24[24]) 151{ 152 unsigned char p21[21]; 153 154 memset(p21, '\0', 21); 155 156 memcpy(p21, passwd, 16); 157 E_P24(p21, c8, p24); 158} 159 160/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */ 161 162/* Does the NT MD4 hash then des encryption. */ 163 164void 165SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) 166{ 167 unsigned char p21[21]; 168 169 memset(p21, '\0', 21); 170 171 E_md4hash(passwd, p21); 172 SMBOWFencrypt(p21, c8, p24); 173} 174 175 176/* Does the md5 encryption from the NT hash for NTLMv2. */ 177/* These routines will be needed later */ 178