smbencrypt.c
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上传日期:2007-01-04
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文件大小:7k
- /*
- Unix SMB/Netbios implementation.
- Version 1.9.
- SMB parameters and setup
- Copyright (C) Andrew Tridgell 1992-1998
- 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.
- */
- #define DEBUG(a,b) ;
- extern int DEBUGLEVEL;
- #include <unistd.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include "smbbyteorder.h"
- #include "smbdes.h"
- #include "smbmd4.h"
- #ifndef _AIX
- typedef unsigned char uchar;
- #endif
- typedef signed short int16;
- typedef unsigned short uint16;
- typedef int BOOL;
- #define False 0
- #define True 1
- /****************************************************************************
- Like strncpy but always null terminates. Make sure there is room!
- The variable n should always be one less than the available size.
- ****************************************************************************/
- char *StrnCpy(char *dest,const char *src, size_t n)
- {
- char *d = dest;
- if (!dest) return(NULL);
- if (!src) {
- *dest = 0;
- return(dest);
- }
- while (n-- && (*d++ = *src++)) ;
- *d = 0;
- return(dest);
- }
- size_t skip_multibyte_char(char c)
- {
- return 0;
- }
- /*******************************************************************
- safe string copy into a known length string. maxlength does not
- include the terminating zero.
- ********************************************************************/
- char *safe_strcpy(char *dest,const char *src, size_t maxlength)
- {
- size_t len;
- if (!dest) {
- DEBUG(0,("ERROR: NULL dest in safe_strcpyn"));
- return NULL;
- }
- if (!src) {
- *dest = 0;
- return dest;
- }
- len = strlen(src);
- if (len > maxlength) {
- DEBUG(0,("ERROR: string overflow by %d in safe_strcpy [%.50s]n",
- (int)(len-maxlength), src));
- len = maxlength;
- }
-
- memcpy(dest, src, len);
- dest[len] = 0;
- return dest;
- }
- void strupper(char *s)
- {
- while (*s)
- {
- {
- size_t skip = skip_multibyte_char( *s );
- if( skip != 0 )
- s += skip;
- else
- {
- if (islower(*s))
- *s = toupper(*s);
- s++;
- }
- }
- }
- }
- extern void SMBOWFencrypt(uchar passwd[16], uchar *c8, uchar p24[24]);
- /*
- 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,' ',21);
- memset(p14,' ',14);
- StrnCpy((char *)p14,(char *)passwd,14);
-
- strupper((char *)p14);
- E_P16(p14, p21);
-
- SMBOWFencrypt(p21, c8, p24);
-
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("SMBencrypt: lm#, challenge, responsen"));
- dump_data(100, (char *)p21, 16);
- dump_data(100, (char *)c8, 8);
- dump_data(100, (char *)p24, 24);
- #endif
- }
- /* 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 len;
- int16 wpwd[129];
-
- /* Password cannot be longer than 128 characters */
- len = strlen((char *)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);
- mdfour(p16, (unsigned char *)wpwd, len);
- }
- /* Does both the NT and LM owfs of a user's password */
- void nt_lm_owf_gen(char *pwd, uchar nt_p16[16], uchar p16[16])
- {
- char passwd[130];
- memset(passwd,' ',130);
- safe_strcpy( passwd, pwd, sizeof(passwd)-1);
- /* Calculate the MD4 hash (NT compatible) of the password */
- memset(nt_p16, ' ', 16);
- E_md4hash((uchar *)passwd, nt_p16);
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("nt_lm_owf_gen: pwd, nt#n"));
- dump_data(120, passwd, strlen(passwd));
- dump_data(100, (char *)nt_p16, 16);
- #endif
- /* Mangle the passwords into Lanman format */
- passwd[14] = ' ';
- strupper(passwd);
- /* Calculate the SMB (lanman) hash functions of the password */
- memset(p16, ' ', 16);
- E_P16((uchar *) passwd, (uchar *)p16);
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("nt_lm_owf_gen: pwd, lm#n"));
- dump_data(120, passwd, strlen(passwd));
- dump_data(100, (char *)p16, 16);
- #endif
- /* clear out local copy of user's password (just being paranoid). */
- memset(passwd, ' ', sizeof(passwd));
- }
- /* Does the des encryption from the NT or LM MD4 hash. */
- void SMBOWFencrypt(uchar passwd[16], uchar *c8, uchar p24[24])
- {
- uchar p21[21];
-
- memset(p21,' ',21);
-
- memcpy(p21, passwd, 16);
- E_P24(p21, c8, p24);
- }
- /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
- void NTLMSSPOWFencrypt(uchar passwd[8], uchar *ntlmchalresp, uchar p24[24])
- {
- uchar p21[21];
-
- memset(p21,' ',21);
- memcpy(p21, passwd, 8);
- memset(p21 + 8, 0xbd, 8);
- E_P24(p21, ntlmchalresp, p24);
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("NTLMSSPOWFencrypt: p21, c8, p24n"));
- dump_data(100, (char *)p21, 21);
- dump_data(100, (char *)ntlmchalresp, 8);
- dump_data(100, (char *)p24, 24);
- #endif
- }
- /* Does the NT MD4 hash then des encryption. */
-
- void SMBNTencrypt(uchar *passwd, uchar *c8, uchar *p24)
- {
- uchar p21[21];
-
- memset(p21,' ',21);
-
- E_md4hash(passwd, p21);
- SMBOWFencrypt(p21, c8, p24);
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("SMBNTencrypt: nt#, challenge, responsen"));
- dump_data(100, (char *)p21, 16);
- dump_data(100, (char *)c8, 8);
- dump_data(100, (char *)p24, 24);
- #endif
- }
- #if 0
- BOOL make_oem_passwd_hash(char data[516], const char *passwd, uchar old_pw_hash[16], BOOL unicode)
- {
- int new_pw_len = strlen(passwd) * (unicode ? 2 : 1);
- if (new_pw_len > 512)
- {
- DEBUG(0,("make_oem_passwd_hash: new password is too long.n"));
- return False;
- }
- /*
- * Now setup the data area.
- * We need to generate a random fill
- * for this area to make it harder to
- * decrypt. JRA.
- */
- generate_random_buffer((unsigned char *)data, 516, False);
- if (unicode)
- {
- struni2( &data[512 - new_pw_len], passwd);
- }
- else
- {
- fstrcpy( &data[512 - new_pw_len], passwd);
- }
- SIVAL(data, 512, new_pw_len);
- #ifdef DEBUG_PASSWORD
- DEBUG(100,("make_oem_passwd_hashn"));
- dump_data(100, data, 516);
- #endif
- SamOEMhash( (unsigned char *)data, (unsigned char *)old_pw_hash, True);
- return True;
- }
- #endif