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/*
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.
*/
#include "includes.h"
extern int DEBUGLEVEL;
#include "byteorder.h"
/*
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 p21[21];
lm_owf_gen(passwd, p21);
SMBOWFencrypt(p21, c8, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBencrypt: lm#, challenge, response\n"));
dump_data(100, p21, 16);
dump_data(100, c8, 8);
dump_data(100, p24, 24);
#endif
}
void SMBNTencrypt(uchar *passwd, uchar *c8, uchar *p24)
{
uchar p21[21];
memset(p21,'\0',21);
nt_owf_gen(passwd, p21);
SMBOWFencrypt(p21, c8, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBNTencrypt: nt#, challenge, response\n"));
dump_data(100, p21, 16);
dump_data(100, c8, 8);
dump_data(100, 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_mbstowcsupper(int16 *dst, const uchar *src, int len)
{
int i;
int16 val;
for(i = 0; i < len; i++) {
val = toupper(*src);
SSVAL(dst,0,val);
dst++;
src++;
if(val == 0)
break;
}
return i;
}
static int _my_mbstowcs(int16 *dst, const 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 the LM owf of a user's password */
void lm_owf_genW(const UNISTR2 *pwd, uchar p16[16])
{
char passwd[15];
memset(passwd,'\0',15);
if (pwd != NULL)
{
unistr2_to_ascii( passwd, pwd, sizeof(passwd)-1);
}
/* Mangle the passwords into Lanman format */
passwd[14] = '\0';
strupper(passwd);
/* Calculate the SMB (lanman) hash functions of the password */
memset(p16, '\0', 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, p16, 16);
#endif
/* clear out local copy of user's password (just being paranoid). */
bzero(passwd, sizeof(passwd));
}
/* Does the LM owf of a user's password */
void lm_owf_gen(const char *pwd, uchar p16[16])
{
char passwd[15];
memset(passwd,'\0',15);
if (pwd != NULL)
{
safe_strcpy( passwd, pwd, sizeof(passwd)-1);
}
/* Mangle the passwords into Lanman format */
passwd[14] = '\0';
strupper(passwd);
/* Calculate the SMB (lanman) hash functions of the password */
memset(p16, '\0', 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, p16, 16);
#endif
/* clear out local copy of user's password (just being paranoid). */
bzero(passwd, sizeof(passwd));
}
/* Does both the NT and LM owfs of a user's password */
void nt_owf_genW(const UNISTR2 *pwd, uchar nt_p16[16])
{
UNISTR2 passwd;
memset(&passwd,'\0',sizeof(passwd));
if (pwd != NULL)
{
copy_unistr2(&passwd, pwd);
}
/* Calculate the MD4 hash (NT compatible) of the password */
memset(nt_p16, '\0', 16);
mdfour(nt_p16, (unsigned char *)passwd.buffer, passwd.uni_str_len * 2);
#ifdef DEBUG_PASSWORD
DEBUG(100,("nt_owf_gen: pwd, nt#\n"));
dump_data(120, (const char*)passwd.buffer, passwd.uni_str_len * 2);
dump_data(100, nt_p16, 16);
#endif
/* clear out local copy of user's password (just being paranoid). */
memset(&passwd, 0, sizeof(passwd));
}
/* Does both the NT and LM owfs of a user's password */
void nt_owf_gen(const char *pwd, uchar nt_p16[16])
{
char passwd[130];
memset(passwd,'\0',130);
if (pwd != NULL)
{
safe_strcpy( passwd, pwd, sizeof(passwd)-1);
}
/* Calculate the MD4 hash (NT compatible) of the password */
memset(nt_p16, '\0', 16);
E_md4hash((uchar *)passwd, nt_p16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("nt_owf_gen: pwd, nt#\n"));
dump_data(120, passwd, strlen(passwd));
dump_data(100, nt_p16, 16);
#endif
/* clear out local copy of user's password (just being paranoid). */
bzero(passwd, sizeof(passwd));
}
/* Does both the NT and LM owfs of a user's UNICODE password */
void nt_lm_owf_genW(const UNISTR2 *pwd, uchar nt_p16[16], uchar lm_p16[16])
{
nt_owf_genW(pwd, nt_p16);
lm_owf_genW(pwd, lm_p16);
}
/* Does both the NT and LM owfs of a user's password */
void nt_lm_owf_gen(const char *pwd, uchar nt_p16[16], uchar lm_p16[16])
{
nt_owf_gen(pwd, nt_p16);
lm_owf_gen(pwd, lm_p16);
}
/* 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,'\0',21);
memcpy(p21, passwd, 16);
E_P24(p21, c8, p24);
}
void SMBOWFencrypt_ntv2(const uchar kr[16],
const uchar *srv_chal, int srv_chal_len,
const uchar *cli_chal, int cli_chal_len,
char resp_buf[16])
{
HMACMD5Context ctx;
hmac_md5_init_limK_to_64(kr, 16, &ctx);
hmac_md5_update(srv_chal, srv_chal_len, &ctx);
hmac_md5_update(cli_chal, cli_chal_len, &ctx);
hmac_md5_final(resp_buf, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBOWFencrypt_ntv2: srv_chal, cli_chal, resp_buf\n"));
dump_data(100, srv_chal, srv_chal_len);
dump_data(100, cli_chal, cli_chal_len);
dump_data(100, resp_buf, 16);
#endif
}
void SMBsesskeygen_ntv2(const uchar kr[16],
const uchar *nt_resp,
char sess_key[16])
{
HMACMD5Context ctx;
hmac_md5_init_limK_to_64(kr, 16, &ctx);
hmac_md5_update(nt_resp, 16, &ctx);
hmac_md5_final(sess_key, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBsesskeygen_ntv2:\n"));
dump_data(100, sess_key, 16);
#endif
}
void SMBsesskeygen_ntv1(const uchar kr[16],
const uchar *nt_resp,
char sess_key[16])
{
mdfour(sess_key, kr, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("SMBsesskeygen_ntv2:\n"));
dump_data(100, sess_key, 16);
#endif
}
void SMBgenclientchals(char *lm_cli_chal,
char *nt_cli_chal, int *nt_cli_chal_len,
const char *srv, const char *dom)
{
NTTIME nt_time;
int srv_len = strlen(srv);
int dom_len = strlen(dom);
fstring server;
fstring domain;
fstrcpy(server, srv);
fstrcpy(domain, dom);
strupper(server);
strupper(domain);
generate_random_buffer(lm_cli_chal, 8, False);
unix_to_nt_time(&nt_time, time(NULL));
CVAL(nt_cli_chal,0) = 0x1;
CVAL(nt_cli_chal,1) = 0x1;
SSVAL(nt_cli_chal, 2, 0x0);
SIVAL(nt_cli_chal, 4, 0x0);
SIVAL(nt_cli_chal, 8, nt_time.low);
SIVAL(nt_cli_chal, 12, nt_time.high);
memcpy(nt_cli_chal+16, lm_cli_chal, 8);
/* fill in offset 24, size of structure, later */
*nt_cli_chal_len = 28;
SSVAL(nt_cli_chal, *nt_cli_chal_len, 2);
*nt_cli_chal_len += 2;
SSVAL(nt_cli_chal, *nt_cli_chal_len, dom_len*2);
*nt_cli_chal_len += 2;
ascii_to_unibuf(nt_cli_chal+(*nt_cli_chal_len), domain, dom_len*2);
*nt_cli_chal_len += dom_len*2;
*nt_cli_chal_len += 4 - ((*nt_cli_chal_len) % 4);
SSVAL(nt_cli_chal, *nt_cli_chal_len, 2);
*nt_cli_chal_len += 2;
SSVAL(nt_cli_chal, 30, srv_len*2);
*nt_cli_chal_len += 2;
ascii_to_unibuf(nt_cli_chal+(*nt_cli_chal_len), server, srv_len*2);
*nt_cli_chal_len += srv_len*2;
SSVAL(nt_cli_chal, 24, (*nt_cli_chal_len)+16);
SSVAL(nt_cli_chal, 26, (*nt_cli_chal_len)+15);
DEBUG(100,("SMBgenclientchals: srv %s, dom %s\n", server, domain));
dump_data(100, nt_cli_chal, *nt_cli_chal_len);
}
void ntv2_owf_gen(const uchar owf[16],
const char *user_n,
const char *domain_n,
uchar kr_buf[16])
{
pstring user_u;
pstring dom_u;
HMACMD5Context ctx;
int user_l = strlen(user_n );
int domain_l = strlen(domain_n);
_my_mbstowcsupper((int16*)user_u, user_n , user_l*2 );
_my_mbstowcsupper((int16*)dom_u , domain_n, domain_l*2);
hmac_md5_init_limK_to_64(owf, 16, &ctx);
hmac_md5_update(user_u, user_l*2, &ctx);
hmac_md5_update(dom_u, domain_l*2, &ctx);
hmac_md5_final(kr_buf, &ctx);
#ifdef DEBUG_PASSWORD
DEBUG(100,("ntv2_owf_gen: user, domain, owfkey, kr\n"));
dump_data(100, user_u, user_l*2);
dump_data(100, dom_u, domain_l*2);
dump_data(100, owf, 16);
dump_data(100, kr_buf, 16);
#endif
}
/* 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,'\0',21);
memcpy(p21, passwd, 8);
memset(p21 + 8, 0xbd, 8);
E_P24(p21, ntlmchalresp, p24);
#ifdef DEBUG_PASSWORD
DEBUG(100,("NTLMSSPOWFencrypt: p21, c8, p24\n"));
dump_data(100, p21, 21);
dump_data(100, ntlmchalresp, 8);
dump_data(100, p24, 24);
#endif
}
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)
{
ascii_to_unibuf(&data[512 - new_pw_len], passwd, new_pw_len);
}
else
{
fstrcpy( &data[512 - new_pw_len], passwd);
}
SIVAL(data, 512, new_pw_len);
#ifdef DEBUG_PASSWORD
DEBUG(100,("make_oem_passwd_hash\n"));
dump_data(100, data, 516);
#endif
SamOEMhash( (unsigned char *)data, (unsigned char *)old_pw_hash, True);
return True;
}
BOOL nt_decrypt_string2(STRING2 *out, const STRING2 *in, char nt_hash[16])
{
uchar bufhdr[8];
int datalen;
uchar key[16];
uchar *keyptr = key;
uchar *keyend = key + sizeof(key);
uchar *outbuf = (uchar *)out->buffer;
const uchar *inbuf = (const uchar *)in->buffer;
const uchar *inbufend;
mdfour(key, nt_hash, 16);
smbhash(bufhdr, inbuf, keyptr, 0);
datalen = IVAL(bufhdr, 0);
if ((datalen > in->str_str_len) || (datalen > MAX_STRINGLEN))
{
DEBUG(0, ("nt_decrypt_string2: failed\n"));
return False;
}
out->str_max_len = out->str_str_len = datalen;
inbuf += 8;
inbufend = inbuf + datalen;
while (inbuf < inbufend)
{
keyptr += 7;
if (keyptr + 7 > keyend)
{
keyptr = (keyend - keyptr) + key;
}
smbhash(outbuf, inbuf, keyptr, 0);
inbuf += 8;
outbuf += 8;
}
return True;
}
/*******************************************************************
creates a DCE/RPC bind authentication response
- initialises the parse structure.
- dynamically allocates the header data structure
- caller is expected to free the header data structure once used.
********************************************************************/
void create_ntlmssp_resp(struct pwd_info *pwd,
char *domain, char *user_name, char *my_name,
uint32 ntlmssp_cli_flgs,
prs_struct *auth_resp)
{
RPC_AUTH_NTLMSSP_RESP ntlmssp_resp;
unsigned char lm_owf[24];
unsigned char nt_owf[128];
size_t nt_owf_len;
pwd_get_lm_nt_owf(pwd, lm_owf, nt_owf, &nt_owf_len, NULL);
make_rpc_auth_ntlmssp_resp(&ntlmssp_resp,
lm_owf, nt_owf, nt_owf_len,
domain, user_name, my_name,
ntlmssp_cli_flgs);
smb_io_rpc_auth_ntlmssp_resp("ntlmssp_resp", &ntlmssp_resp, auth_resp, 0);
mem_realloc_data(auth_resp->data, auth_resp->offset);
}
/***********************************************************
decode a password buffer
************************************************************/
BOOL decode_pw_buffer(const char buffer[516], char *new_passwd,
int new_passwd_size, uint32 *new_pw_len)
{
/*
* The length of the new password is in the last 4 bytes of
* the data buffer.
*/
(*new_pw_len) = IVAL(buffer, 512);
#ifdef DEBUG_PASSWORD
dump_data(100, buffer, 516);
#endif
if ((*new_pw_len) < 0 || (*new_pw_len) > new_passwd_size - 1)
{
DEBUG(0,("check_oem_password: incorrect password length (%d).\n", (*new_pw_len)));
return False;
}
memcpy(new_passwd, &buffer[512-(*new_pw_len)], (*new_pw_len));
new_passwd[(*new_pw_len)] = '\0';
return True;
}
/***********************************************************
encode a password buffer
************************************************************/
BOOL encode_pw_buffer(char buffer[516], const char *new_pass,
int new_pw_len, BOOL nt_pass_set)
{
generate_random_buffer(buffer, 516, True);
if (nt_pass_set)
{
/*
* nt passwords are in unicode. last char overwrites NULL
* in ascii_to_unibuf, so use SIVAL *afterwards*.
*/
new_pw_len *= 2;
ascii_to_unibuf(&buffer[512-new_pw_len], new_pass, new_pw_len);
}
else
{
memcpy(&buffer[512-new_pw_len], new_pass, new_pw_len);
}
/*
* The length of the new password is in the last 4 bytes of
* the data buffer.
*/
SIVAL(buffer, 512, new_pw_len);
#ifdef DEBUG_PASSWORD
dump_data(100, buffer, 516);
#endif
return True;
}
|