1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #if !defined(CURL_DISABLE_HTTP) && defined(USE_NTLM)
26
27 /*
28 * NTLM details:
29 *
30 * https://davenport.sourceforge.io/ntlm.html
31 * https://www.innovation.ch/java/ntlm.html
32 */
33
34 #define DEBUG_ME 0
35
36 #include "urldata.h"
37 #include "sendf.h"
38 #include "strcase.h"
39 #include "http_ntlm.h"
40 #include "curl_ntlm_core.h"
41 #include "curl_ntlm_wb.h"
42 #include "vauth/vauth.h"
43 #include "url.h"
44
45 /* SSL backend-specific #if branches in this file must be kept in the order
46 documented in curl_ntlm_core. */
47 #if defined(NTLM_NEEDS_NSS_INIT)
48 #include "vtls/nssg.h"
49 #elif defined(USE_WINDOWS_SSPI)
50 #include "curl_sspi.h"
51 #endif
52
53 /* The last 3 #include files should be in this order */
54 #include "curl_printf.h"
55 #include "curl_memory.h"
56 #include "memdebug.h"
57
58 #if DEBUG_ME
59 # define DEBUG_OUT(x) x
60 #else
61 # define DEBUG_OUT(x) Curl_nop_stmt
62 #endif
63
Curl_input_ntlm(struct connectdata * conn,bool proxy,const char * header)64 CURLcode Curl_input_ntlm(struct connectdata *conn,
65 bool proxy, /* if proxy or not */
66 const char *header) /* rest of the www-authenticate:
67 header */
68 {
69 /* point to the correct struct with this */
70 struct ntlmdata *ntlm;
71 CURLcode result = CURLE_OK;
72
73 ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
74
75 if(checkprefix("NTLM", header)) {
76 header += strlen("NTLM");
77
78 while(*header && ISSPACE(*header))
79 header++;
80
81 if(*header) {
82 result = Curl_auth_decode_ntlm_type2_message(conn->data, header, ntlm);
83 if(result)
84 return result;
85
86 ntlm->state = NTLMSTATE_TYPE2; /* We got a type-2 message */
87 }
88 else {
89 if(ntlm->state == NTLMSTATE_LAST) {
90 infof(conn->data, "NTLM auth restarted\n");
91 Curl_http_ntlm_cleanup(conn);
92 }
93 else if(ntlm->state == NTLMSTATE_TYPE3) {
94 infof(conn->data, "NTLM handshake rejected\n");
95 Curl_http_ntlm_cleanup(conn);
96 ntlm->state = NTLMSTATE_NONE;
97 return CURLE_REMOTE_ACCESS_DENIED;
98 }
99 else if(ntlm->state >= NTLMSTATE_TYPE1) {
100 infof(conn->data, "NTLM handshake failure (internal error)\n");
101 return CURLE_REMOTE_ACCESS_DENIED;
102 }
103
104 ntlm->state = NTLMSTATE_TYPE1; /* We should send away a type-1 */
105 }
106 }
107
108 return result;
109 }
110
111 /*
112 * This is for creating ntlm header output
113 */
Curl_output_ntlm(struct connectdata * conn,bool proxy)114 CURLcode Curl_output_ntlm(struct connectdata *conn, bool proxy)
115 {
116 char *base64 = NULL;
117 size_t len = 0;
118 CURLcode result;
119
120 /* point to the address of the pointer that holds the string to send to the
121 server, which is for a plain host or for a HTTP proxy */
122 char **allocuserpwd;
123
124 /* point to the username, password, service and host */
125 const char *userp;
126 const char *passwdp;
127 const char *service = NULL;
128 const char *hostname = NULL;
129
130 /* point to the correct struct with this */
131 struct ntlmdata *ntlm;
132 struct auth *authp;
133
134 DEBUGASSERT(conn);
135 DEBUGASSERT(conn->data);
136
137 #if defined(NTLM_NEEDS_NSS_INIT)
138 if(CURLE_OK != Curl_nss_force_init(conn->data))
139 return CURLE_OUT_OF_MEMORY;
140 #endif
141
142 if(proxy) {
143 allocuserpwd = &conn->allocptr.proxyuserpwd;
144 userp = conn->http_proxy.user;
145 passwdp = conn->http_proxy.passwd;
146 service = conn->data->set.str[STRING_PROXY_SERVICE_NAME] ?
147 conn->data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
148 hostname = conn->http_proxy.host.name;
149 ntlm = &conn->proxyntlm;
150 authp = &conn->data->state.authproxy;
151 }
152 else {
153 allocuserpwd = &conn->allocptr.userpwd;
154 userp = conn->user;
155 passwdp = conn->passwd;
156 service = conn->data->set.str[STRING_SERVICE_NAME] ?
157 conn->data->set.str[STRING_SERVICE_NAME] : "HTTP";
158 hostname = conn->host.name;
159 ntlm = &conn->ntlm;
160 authp = &conn->data->state.authhost;
161 }
162 authp->done = FALSE;
163
164 /* not set means empty */
165 if(!userp)
166 userp = "";
167
168 if(!passwdp)
169 passwdp = "";
170
171 #ifdef USE_WINDOWS_SSPI
172 if(s_hSecDll == NULL) {
173 /* not thread safe and leaks - use curl_global_init() to avoid */
174 CURLcode err = Curl_sspi_global_init();
175 if(s_hSecDll == NULL)
176 return err;
177 }
178 #ifdef SECPKG_ATTR_ENDPOINT_BINDINGS
179 ntlm->sslContext = conn->sslContext;
180 #endif
181 #endif
182
183 switch(ntlm->state) {
184 case NTLMSTATE_TYPE1:
185 default: /* for the weird cases we (re)start here */
186 /* Create a type-1 message */
187 result = Curl_auth_create_ntlm_type1_message(conn->data, userp, passwdp,
188 service, hostname,
189 ntlm, &base64,
190 &len);
191 if(result)
192 return result;
193
194 if(base64) {
195 free(*allocuserpwd);
196 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
197 proxy ? "Proxy-" : "",
198 base64);
199 free(base64);
200 if(!*allocuserpwd)
201 return CURLE_OUT_OF_MEMORY;
202
203 DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
204 }
205 break;
206
207 case NTLMSTATE_TYPE2:
208 /* We already received the type-2 message, create a type-3 message */
209 result = Curl_auth_create_ntlm_type3_message(conn->data, userp, passwdp,
210 ntlm, &base64, &len);
211 if(result)
212 return result;
213
214 if(base64) {
215 free(*allocuserpwd);
216 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
217 proxy ? "Proxy-" : "",
218 base64);
219 free(base64);
220 if(!*allocuserpwd)
221 return CURLE_OUT_OF_MEMORY;
222
223 DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
224
225 ntlm->state = NTLMSTATE_TYPE3; /* we send a type-3 */
226 authp->done = TRUE;
227 }
228 break;
229
230 case NTLMSTATE_TYPE3:
231 /* connection is already authenticated,
232 * don't send a header in future requests */
233 ntlm->state = NTLMSTATE_LAST;
234 /* FALLTHROUGH */
235 case NTLMSTATE_LAST:
236 Curl_safefree(*allocuserpwd);
237 authp->done = TRUE;
238 break;
239 }
240
241 return CURLE_OK;
242 }
243
Curl_http_ntlm_cleanup(struct connectdata * conn)244 void Curl_http_ntlm_cleanup(struct connectdata *conn)
245 {
246 Curl_auth_ntlm_cleanup(&conn->ntlm);
247 Curl_auth_ntlm_cleanup(&conn->proxyntlm);
248
249 #if defined(NTLM_WB_ENABLED)
250 Curl_ntlm_wb_cleanup(conn);
251 #endif
252 }
253
254 #endif /* !CURL_DISABLE_HTTP && USE_NTLM */
255