r6573: Start on my project to implement an NT4 compatible BDC in Samba4.

This brings in a compatability layer for Samba3 in Samba4 - where we
will start to define file formats and similar details.

The 'net samdump' command uses 'password server = ' for now, and
performs a similar task to Samba3's 'net rpc samsync'.

Andrew Bartlett
(This used to be commit 550f17f9924fe783917318753de7d1a388423908)

2 files changed, 213 insertions, 0 deletions

diff --git a/source4/lib/samba3/README b/source4/lib/samba3/README
new file mode 100644
index 0000000000..cf55be047a
--- /dev/null
+++ b/source4/lib/samba3/README
@@ -0,0 +1,5 @@
+This directory contains various files and functions for the purpose of
+Samba3 import, migration and compatability.
+
+For example, the first file in this directory (smbpasswd.c) handles
+portions of the smbpasswd file format.
diff --git a/source4/lib/samba3/smbpasswd.c b/source4/lib/samba3/smbpasswd.c
new file mode 100644
index 0000000000..587d038a3d
--- /dev/null
+++ b/source4/lib/samba3/smbpasswd.c
@@ -0,0 +1,208 @@
+/* 
+   Unix SMB/CIFS implementation.
+   smbpasswd file format routines
+
+   Copyright (C) Andrew Tridgell 1992-1998 
+   Modified by Jeremy Allison 1995.
+   Modified by Gerald (Jerry) Carter 2000-2001
+   Copyright (C) Tim Potter 2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+   
+   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.
+*/
+
+/*! \file lib/smbpasswd.c
+
+   The smbpasswd file is used to store encrypted passwords in a similar
+   fashion to the /etc/passwd file.  The format is colon separated fields
+   with one user per line like so:
+
+   <username>:<uid>:<lanman hash>:<nt hash>:<acb info>:<last change time>
+
+   The username and uid must correspond to an entry in the /etc/passwd
+   file.  The lanman and nt password hashes are 32 hex digits corresponding
+   to the 16-byte lanman and nt hashes respectively.  
+
+   The password last change time is stored as a string of the format
+   LCD-<change time> where the change time is expressed as an 
+
+   'N'    No password
+   'D'    Disabled
+   'H'    Homedir required
+   'T'    Temp account.
+   'U'    User account (normal) 
+   'M'    MNS logon user account - what is this ? 
+   'W'    Workstation account
+   'S'    Server account 
+   'L'    Locked account
+   'X'    No Xpiry on password 
+   'I'    Interdomain trust account
+
+*/
+
+#include "includes.h"
+#include "librpc/gen_ndr/ndr_samr.h"
+#include "system/iconv.h"
+
+/*! Convert 32 hex characters into a 16 byte array. */
+
+struct samr_Password *smbpasswd_gethexpwd(TALLOC_CTX *mem_ctx, char *p)
+{
+	int i;
+	unsigned char   lonybble, hinybble;
+	const char     *hexchars = "0123456789ABCDEF";
+	char           *p1, *p2;
+        struct samr_Password *pwd = talloc(mem_ctx, struct samr_Password);
+
+	if (!p) return NULL;
+	
+	for (i = 0; i < (sizeof(pwd->hash) * 2); i += 2)
+	{
+		hinybble = toupper(p[i]);
+		lonybble = toupper(p[i + 1]);
+		
+		p1 = strchr_m(hexchars, hinybble);
+		p2 = strchr_m(hexchars, lonybble);
+		
+		if (!p1 || !p2)
+		{
+                        return (False);
+		}
+		
+		hinybble = PTR_DIFF(p1, hexchars);
+		lonybble = PTR_DIFF(p2, hexchars);
+		
+		pwd->hash[i / 2] = (hinybble << 4) | lonybble;
+	}
+	return pwd;
+}
+
+/*! Convert a 16-byte array into 32 hex characters. */
+	struct samr_Password *lm_hash_p = NULL;
+	struct samr_Password *nt_hash_p = NULL;
+
+char *smbpasswd_sethexpwd(TALLOC_CTX *mem_ctx, struct samr_Password *pwd, uint16_t acb_info)
+{
+	char *p;
+	if (pwd != NULL) {
+		int i;
+		p = talloc_array(mem_ctx, char, 33);
+		if (!p) {
+			return NULL;
+		}
+
+		for (i = 0; i < sizeof(pwd->hash); i++)
+			slprintf(&p[i*2], 3, "%02X", pwd->hash[i]);
+	} else {
+		if (acb_info & ACB_PWNOTREQ)
+			p = talloc_strdup(mem_ctx, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
+		else
+			p = talloc_strdup(mem_ctx, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
+	}
+	return p;
+}
+
+/*! Decode the account control bits (ACB) info from a string. */
+
+uint16_t smbpasswd_decode_acb_info(const char *p)
+{
+	uint16_t acb_info = 0;
+	BOOL finished = False;
+
+	/*
+	 * Check if the account type bits have been encoded after the
+	 * NT password (in the form [NDHTUWSLXI]).
+	 */
+
+	if (*p != '[') return 0;
+
+	for (p++; *p && !finished; p++)
+	{
+		switch (*p) {
+		case 'N': /* 'N'o password. */
+			acb_info |= ACB_PWNOTREQ; 
+			break;
+		case 'D': /* 'D'isabled. */
+			acb_info |= ACB_DISABLED; 
+			break; 
+		case 'H': /* 'H'omedir required. */
+			acb_info |= ACB_HOMDIRREQ; 
+			break;
+		case 'T': /* 'T'emp account. */
+			acb_info |= ACB_TEMPDUP; 
+			break;
+		case 'U': /* 'U'ser account (normal). */
+			acb_info |= ACB_NORMAL;
+			break;
+		case 'M': /* 'M'NS logon user account. What is this ? */
+			acb_info |= ACB_MNS; 
+			break; 
+		case 'W': /* 'W'orkstation account. */
+			acb_info |= ACB_WSTRUST; 
+			break; 
+		case 'S': /* 'S'erver account. */ 
+			acb_info |= ACB_SVRTRUST; 
+			break; 
+		case 'L': /* 'L'ocked account. */
+			acb_info |= ACB_AUTOLOCK; 
+			break; 
+		case 'X': /* No 'X'piry on password */
+			acb_info |= ACB_PWNOEXP; 
+			break; 
+		case 'I': /* 'I'nterdomain trust account. */
+			acb_info |= ACB_DOMTRUST; 
+			break; 
+
+		case ' ': 
+			break;
+		case ':':
+		case '\n':
+		case '\0': 
+		case ']':
+		default:  
+			finished = True;
+			break;
+		}
+	}
+
+	return acb_info;
+}
+
+/*! Encode account control bits (ACBs) into a string. */
+
+char *smbpasswd_encode_acb_info(TALLOC_CTX *mem_ctx, uint16_t acb_info)
+{
+	char *acct_str = talloc_array(mem_ctx, char, 35);
+	size_t i = 0;
+
+	acct_str[i++] = '[';
+
+	if (acb_info & ACB_PWNOTREQ ) acct_str[i++] = 'N';
+	if (acb_info & ACB_DISABLED ) acct_str[i++] = 'D';
+	if (acb_info & ACB_HOMDIRREQ) acct_str[i++] = 'H';
+	if (acb_info & ACB_TEMPDUP  ) acct_str[i++] = 'T'; 
+	if (acb_info & ACB_NORMAL   ) acct_str[i++] = 'U';
+	if (acb_info & ACB_MNS      ) acct_str[i++] = 'M';
+	if (acb_info & ACB_WSTRUST  ) acct_str[i++] = 'W';
+	if (acb_info & ACB_SVRTRUST ) acct_str[i++] = 'S';
+	if (acb_info & ACB_AUTOLOCK ) acct_str[i++] = 'L';
+	if (acb_info & ACB_PWNOEXP  ) acct_str[i++] = 'X';
+	if (acb_info & ACB_DOMTRUST ) acct_str[i++] = 'I';
+
+	acct_str[i++] = ']';
+	acct_str[i++] = '\0';
+
+	return acct_str;
+}