first public release of samba4 code

source/auth/auth_unix.c

@@ -0,0 +1,132 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Password and authentication handling
+   Copyright (C) Andrew Bartlett              2001
+   
+   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"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/**
+ * update the encrypted smbpasswd file from the plaintext username and password
+ *  
+ *  this ugly hack needs to die, but not quite yet, I think people still use it...
+ **/
+static BOOL update_smbpassword_file(const char *user, const char *password)
+{
+	SAM_ACCOUNT 	*sampass = NULL;
+	BOOL            ret;
+	
+	pdb_init_sam(&sampass);
+	
+	become_root();
+	ret = pdb_getsampwnam(sampass, user);
+	unbecome_root();
+
+	if(ret == False) {
+		DEBUG(0,("pdb_getsampwnam returned NULL\n"));
+		pdb_free_sam(&sampass);
+		return False;
+	}
+
+	/*
+	 * Remove the account disabled flag - we are updating the
+	 * users password from a login.
+	 */
+	if (!pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED, PDB_CHANGED)) {
+		pdb_free_sam(&sampass);
+		return False;
+	}
+
+	if (!pdb_set_plaintext_passwd (sampass, password)) {
+		pdb_free_sam(&sampass);
+		return False;
+	}
+
+	/* Now write it into the file. */
+	become_root();
+
+	ret = pdb_update_sam_account (sampass);
+
+	unbecome_root();
+
+	if (ret) {
+		DEBUG(3,("pdb_update_sam_account returned %d\n",ret));
+	}
+
+	pdb_free_sam(&sampass);
+	return ret;
+}
+
+
+/** Check a plaintext username/password
+ *
+ * Cannot deal with an encrupted password in any manner whatsoever,
+ * unless the account has a null password.
+ **/
+
+static NTSTATUS check_unix_security(const struct auth_context *auth_context,
+			     void *my_private_data, 
+			     TALLOC_CTX *mem_ctx,
+			     const auth_usersupplied_info *user_info, 
+			     auth_serversupplied_info **server_info)
+{
+	NTSTATUS nt_status;
+	struct passwd *pass = NULL;
+
+	become_root();
+	pass = Get_Pwnam(user_info->internal_username.str);
+
+	
+	/** @todo This call assumes a ASCII password, no charset transformation is 
+	    done.  We may need to revisit this **/
+	nt_status = pass_check(pass,
+				pass ? pass->pw_name : user_info->internal_username.str, 
+				(char *)user_info->plaintext_password.data,
+				user_info->plaintext_password.length-1,
+				lp_update_encrypted() ? 
+				update_smbpassword_file : NULL,
+				True);
+	
+	unbecome_root();
+
+	if (NT_STATUS_IS_OK(nt_status)) {
+		if (pass) {
+			make_server_info_pw(server_info, pass);
+		} else {
+			/* we need to do somthing more useful here */
+			nt_status = NT_STATUS_NO_SUCH_USER;
+		}
+	}
+
+	return nt_status;
+}
+
+/* module initialisation */
+NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method) 
+{
+	if (!make_auth_methods(auth_context, auth_method)) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	(*auth_method)->name = "unix";
+	(*auth_method)->auth = check_unix_security;
+	return NT_STATUS_OK;
+}
+