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Diffstat (limited to 'source/libsmb/smbencrypt.c')
| -rw-r--r-- | source/libsmb/smbencrypt.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/source/libsmb/smbencrypt.c b/source/libsmb/smbencrypt.c new file mode 100644 index 00000000000..a0683b5d282 --- /dev/null +++ b/source/libsmb/smbencrypt.c @@ -0,0 +1,202 @@ +#ifdef SMB_PASSWD +/* + Unix SMB/Netbios implementation. + Version 1.9. + SMB parameters and setup + Copyright (C) Andrew Tridgell 1992-1995 + Modified by Jeremy Allison 1995. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "loadparm.h" +#include "des.h" +#include "md4.h" + +extern int DEBUGLEVEL; + +#ifndef uchar +#define uchar unsigned char +#endif +#ifndef int16 +#define int16 unsigned short +#endif +#ifndef uint16 +#define uint16 unsigned short +#endif +#ifndef uint32 +#define uint32 unsigned int +#endif + +#include "byteorder.h" + +void str_to_key(uchar *str,uchar *key) +{ + void des_set_odd_parity(des_cblock *); + int i; + + key[0] = str[0]>>1; + key[1] = ((str[0]&0x01)<<6) | (str[1]>>2); + key[2] = ((str[1]&0x03)<<5) | (str[2]>>3); + key[3] = ((str[2]&0x07)<<4) | (str[3]>>4); + key[4] = ((str[3]&0x0F)<<3) | (str[4]>>5); + key[5] = ((str[4]&0x1F)<<2) | (str[5]>>6); + key[6] = ((str[5]&0x3F)<<1) | (str[6]>>7); + key[7] = str[6]&0x7F; + for (i=0;i<8;i++) { + key[i] = (key[i]<<1); + } + des_set_odd_parity((des_cblock *)key); +} + +void D1(uchar *k, uchar *d, uchar *out) +{ + des_key_schedule ks; + des_cblock deskey; + + str_to_key(k,(uchar *)deskey); + des_set_key(deskey,ks); + des_ecb_encrypt(d, out, ks, DES_DECRYPT); +} + +void E1(uchar *k, uchar *d, uchar *out) +{ + des_key_schedule ks; + des_cblock deskey; + + str_to_key(k,(uchar *)deskey); + des_set_key(deskey,ks); + des_ecb_encrypt(d, out, ks, DES_ENCRYPT); +} + +void E_P16(uchar *p14,uchar *p16) +{ + uchar sp7[7]; + /* the following constant makes us compatible with other + implementations. Note that publishing this constant does not reduce the + security of the encryption mechanism */ + uchar sp8[] = {0xAA,0xD3,0xB4,0x35,0xB5,0x14,0x4,0xEE}; + uchar x[8]; + + memset(sp7,'\0',7); + + D1(sp7, sp8, x); + E1(p14, x, p16); + E1(p14+7, x, p16+8); +} + +void E_P24(uchar *p21, uchar *c8, uchar *p24) +{ + E1(p21, c8, p24); + E1(p21+7, c8, p24+8); + E1(p21+14, c8, p24+16); +} + + +/* + This implements the X/Open SMB password encryption + It takes a password, a 8 byte "crypt key" and puts 24 bytes of + encrypted password into p24 */ +void SMBencrypt(uchar *passwd, uchar *c8, uchar *p24) +{ + uchar p14[15], p21[21]; + + memset(p21,'\0',21); + memset(p14,'\0',14); + StrnCpy((char *)p14,(char *)passwd,14); + + strupper((char *)p14); + E_P16(p14, p21); + E_P24(p21, c8, p24); +} + +/* Routines for Windows NT MD4 Hash functions. */ +static int _my_wcslen(int16 *str) +{ + int len = 0; + while(*str++ != 0) + len++; + return len; +} + +/* + * Convert a string into an NT UNICODE string. + * Note that regardless of processor type + * this must be in intel (little-endian) + * format. + */ + +static int _my_mbstowcs(int16 *dst, uchar *src, int len) +{ + int i; + int16 val; + + for(i = 0; i < len; i++) { + val = *src; + SSVAL(dst,0,val); + dst++; + src++; + if(val == 0) + break; + } + return i; +} + +/* + * Creates the MD4 Hash of the users password in NT UNICODE. + */ + +void E_md4hash(uchar *passwd, uchar *p16) +{ + int i, len; + int16 wpwd[129]; + MDstruct MD; + + /* Password cannot be longer than 128 characters */ + len = strlen(passwd); + if(len > 128) + len = 128; + /* Password must be converted to NT unicode */ + _my_mbstowcs( wpwd, passwd, len); + wpwd[len] = 0; /* Ensure string is null terminated */ + /* Calculate length in bytes */ + len = _my_wcslen(wpwd) * sizeof(int16); + + MDbegin(&MD); + for(i = 0; i + 64 <= len; i += 64) + MDupdate(&MD,wpwd + (i/2), 512); + MDupdate(&MD,wpwd + (i/2),(len-i)*8); + SIVAL(p16,0,MD.buffer[0]); + SIVAL(p16,4,MD.buffer[1]); + SIVAL(p16,8,MD.buffer[2]); + SIVAL(p16,12,MD.buffer[3]); +} + +/* Does the NT MD4 hash then des encryption. */ + +void SMBNTencrypt(uchar *passwd, uchar *c8, uchar *p24) +{ + uchar p21[21]; + + memset(p21,'\0',21); + + E_md4hash(passwd, p21); + E_P24(p21, c8, p24); +} + +#else +void smbencrypt_dummy(void){} +#endif |