mirror of
https://github.com/moparisthebest/curl
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a78c61a4bf
Only choose the GSSAPI authentication mechanism when the user name contains a Windows domain name or the user is a valid UPN. Fixes #718
148 lines
4.3 KiB
C
148 lines
4.3 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2014 - 2016, Steve Holme, <steve_holme@hotmail.com>.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include <curl/curl.h>
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#include "vauth.h"
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#include "curl_multibyte.h"
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#include "curl_printf.h"
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/* The last #include files should be: */
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#include "curl_memory.h"
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#include "memdebug.h"
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/*
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* Curl_auth_build_spn()
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*
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* This is used to build a SPN string in the following formats:
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*
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* service/host@realm (Not currently used)
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* service/host (Not used by GSS-API)
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* service@realm (Not used by Windows SSPI)
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*
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* Parameters:
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*
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* service [in] - The service type such as http, smtp, pop or imap.
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* host [in] - The host name.
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* realm [in] - The realm.
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*
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* Returns a pointer to the newly allocated SPN.
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*/
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#if !defined(USE_WINDOWS_SSPI)
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char *Curl_auth_build_spn(const char *service, const char *host,
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const char *realm)
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{
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char *spn = NULL;
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/* Generate our SPN */
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if(host && realm)
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spn = aprintf("%s/%s@%s", service, host, realm);
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else if(host)
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spn = aprintf("%s/%s", service, host);
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else if(realm)
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spn = aprintf("%s@%s", service, realm);
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/* Return our newly allocated SPN */
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return spn;
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}
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#else
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TCHAR *Curl_auth_build_spn(const char *service, const char *host,
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const char *realm)
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{
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char *utf8_spn = NULL;
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TCHAR *tchar_spn = NULL;
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(void) realm;
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/* Note: We could use DsMakeSPN() or DsClientMakeSpnForTargetServer() rather
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than doing this ourselves but the first is only available in Windows XP
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and Windows Server 2003 and the latter is only available in Windows 2000
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but not Windows95/98/ME or Windows NT4.0 unless the Active Directory
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Client Extensions are installed. As such it is far simpler for us to
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formulate the SPN instead. */
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/* Generate our UTF8 based SPN */
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utf8_spn = aprintf("%s/%s", service, host);
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if(!utf8_spn) {
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return NULL;
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}
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/* Allocate our TCHAR based SPN */
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tchar_spn = Curl_convert_UTF8_to_tchar(utf8_spn);
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if(!tchar_spn) {
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free(utf8_spn);
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return NULL;
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}
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/* Release the UTF8 variant when operating with Unicode */
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Curl_unicodefree(utf8_spn);
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/* Return our newly allocated SPN */
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return tchar_spn;
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}
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#endif /* USE_WINDOWS_SSPI */
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/*
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* Curl_auth_user_contains_domain()
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*
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* This is used to test if the specified user contains a Windows domain name as
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* follows:
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*
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* User\Domain (Down-level Logon Name)
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* User/Domain (curl Down-level format - for compatibility with existing code)
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* User@Domain (User Principal Name)
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*
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* Note: The user name may be empty when using a GSS-API library or Windows SSPI
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* as the user and domain are either obtained from the credientals cache when
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* using GSS-API or via the currently logged in user's credientals when using
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* Windows SSPI.
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*
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* Parameters:
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*
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* user [in] - The user name.
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*
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* Returns TRUE on success; otherwise FALSE.
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*/
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bool Curl_auth_user_contains_domain(const char *user)
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{
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bool valid = FALSE;
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if(user && *user) {
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/* Check we have a domain name or UPN present */
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char *p = strpbrk(user, "\\/@");
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valid = (p != NULL && p > user && p < user + strlen(user) - 1 ? TRUE :
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FALSE);
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}
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#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
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else
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/* User and domain are obtained from the GSS-API credientials cache or the
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currently logged in user from Windows */
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valid = TRUE;
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#endif
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return valid;
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}
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