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-rw-r--r--libntlm-0.21/smbencrypt.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/libntlm-0.21/smbencrypt.c b/libntlm-0.21/smbencrypt.c
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+++ b/libntlm-0.21/smbencrypt.c
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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.
+*/
+
+#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"
+
+typedef unsigned char uchar;
+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_strcpy\n"));
+ 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,'\0',21);
+ memset(p14,'\0',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, response\n"));
+ 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,'\0',130);
+ 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_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] = '\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, (char *)p16, 16);
+#endif
+ /* clear out local copy of user's password (just being paranoid). */
+ memset(passwd, '\0', 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,'\0',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,'\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, (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,'\0',21);
+
+ E_md4hash(passwd, p21);
+ SMBOWFencrypt(p21, c8, p24);
+
+#ifdef DEBUG_PASSWORD
+ DEBUG(100,("SMBNTencrypt: nt#, challenge, response\n"));
+ 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_hash\n"));
+ dump_data(100, data, 516);
+#endif
+ SamOEMhash( (unsigned char *)data, (unsigned char *)old_pw_hash, True);
+
+ return True;
+}
+
+#endif
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