| 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 2014 - 2016, Steve Holme, <steve_holme@hotmail.com>.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #include <curl/curl.h>
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| 26 |
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| 27 | #include "vauth.h"
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| 28 | #include "curl_multibyte.h"
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| 29 | #include "curl_printf.h"
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| 30 |
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| 31 | /* The last #include files should be: */
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| 32 | #include "curl_memory.h"
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| 33 | #include "memdebug.h"
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| 34 |
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| 35 | /*
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| 36 | * Curl_auth_build_spn()
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| 37 | *
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| 38 | * This is used to build a SPN string in the following formats:
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| 39 | *
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| 40 | * service/host@realm (Not currently used)
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| 41 | * service/host (Not used by GSS-API)
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| 42 | * service@realm (Not used by Windows SSPI)
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| 43 | *
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| 44 | * Parameters:
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| 45 | *
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| 46 | * service [in] - The service type such as http, smtp, pop or imap.
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| 47 | * host [in] - The host name.
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| 48 | * realm [in] - The realm.
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| 49 | *
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| 50 | * Returns a pointer to the newly allocated SPN.
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| 51 | */
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| 52 | #if !defined(USE_WINDOWS_SSPI)
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| 53 | char *Curl_auth_build_spn(const char *service, const char *host,
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| 54 | const char *realm)
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| 55 | {
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| 56 | char *spn = NULL;
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| 57 |
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| 58 | /* Generate our SPN */
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| 59 | if(host && realm)
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| 60 | spn = aprintf("%s/%s@%s", service, host, realm);
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| 61 | else if(host)
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| 62 | spn = aprintf("%s/%s", service, host);
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| 63 | else if(realm)
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| 64 | spn = aprintf("%s@%s", service, realm);
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| 65 |
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| 66 | /* Return our newly allocated SPN */
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| 67 | return spn;
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| 68 | }
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| 69 | #else
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| 70 | TCHAR *Curl_auth_build_spn(const char *service, const char *host,
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| 71 | const char *realm)
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| 72 | {
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| 73 | char *utf8_spn = NULL;
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| 74 | TCHAR *tchar_spn = NULL;
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| 75 |
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| 76 | (void) realm;
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| 77 |
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| 78 | /* Note: We could use DsMakeSPN() or DsClientMakeSpnForTargetServer() rather
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| 79 | than doing this ourselves but the first is only available in Windows XP
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| 80 | and Windows Server 2003 and the latter is only available in Windows 2000
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| 81 | but not Windows95/98/ME or Windows NT4.0 unless the Active Directory
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| 82 | Client Extensions are installed. As such it is far simpler for us to
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| 83 | formulate the SPN instead. */
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| 84 |
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| 85 | /* Generate our UTF8 based SPN */
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| 86 | utf8_spn = aprintf("%s/%s", service, host);
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| 87 | if(!utf8_spn) {
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| 88 | return NULL;
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| 89 | }
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| 90 |
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| 91 | /* Allocate our TCHAR based SPN */
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| 92 | tchar_spn = Curl_convert_UTF8_to_tchar(utf8_spn);
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| 93 | if(!tchar_spn) {
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| 94 | free(utf8_spn);
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| 95 |
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| 96 | return NULL;
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| 97 | }
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| 98 |
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| 99 | /* Release the UTF8 variant when operating with Unicode */
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| 100 | Curl_unicodefree(utf8_spn);
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| 101 |
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| 102 | /* Return our newly allocated SPN */
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| 103 | return tchar_spn;
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| 104 | }
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| 105 | #endif /* USE_WINDOWS_SSPI */
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| 106 |
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| 107 | /*
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| 108 | * Curl_auth_user_contains_domain()
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| 109 | *
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| 110 | * This is used to test if the specified user contains a Windows domain name as
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| 111 | * follows:
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| 112 | *
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| 113 | * User\Domain (Down-level Logon Name)
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| 114 | * User/Domain (curl Down-level format - for compatibility with existing code)
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| 115 | * User@Domain (User Principal Name)
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| 116 | *
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| 117 | * Note: The user name may be empty when using a GSS-API library or Windows SSPI
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| 118 | * as the user and domain are either obtained from the credentials cache when
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| 119 | * using GSS-API or via the currently logged in user's credentials when using
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| 120 | * Windows SSPI.
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| 121 | *
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| 122 | * Parameters:
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| 123 | *
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| 124 | * user [in] - The user name.
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| 125 | *
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| 126 | * Returns TRUE on success; otherwise FALSE.
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| 127 | */
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| 128 | bool Curl_auth_user_contains_domain(const char *user)
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| 129 | {
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| 130 | bool valid = FALSE;
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| 131 |
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| 132 | if(user && *user) {
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| 133 | /* Check we have a domain name or UPN present */
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| 134 | char *p = strpbrk(user, "\\/@");
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| 135 |
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| 136 | valid = (p != NULL && p > user && p < user + strlen(user) - 1 ? TRUE :
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| 137 | FALSE);
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| 138 | }
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| 139 | #if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
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| 140 | else
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| 141 | /* User and domain are obtained from the GSS-API credentials cache or the
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| 142 | currently logged in user from Windows */
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| 143 | valid = TRUE;
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| 144 | #endif
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| 145 |
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| 146 | return valid;
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| 147 | }
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