1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2016, 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 * http://davenport.sourceforge.net/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_wb.h"
41 #include "vauth/vauth.h"
42 #include "url.h"
43
44 #if defined(USE_NSS)
45 #include "vtls/nssg.h"
46 #elif defined(USE_WINDOWS_SSPI)
47 #include "curl_sspi.h"
48 #endif
49
50 /* The last 3 #include files should be in this order */
51 #include "curl_printf.h"
52 #include "curl_memory.h"
53 #include "memdebug.h"
54
55 #if DEBUG_ME
56 # define DEBUG_OUT(x) x
57 #else
58 # define DEBUG_OUT(x) Curl_nop_stmt
59 #endif
60
Curl_input_ntlm(struct connectdata * conn,bool proxy,const char * header)61 CURLcode Curl_input_ntlm(struct connectdata *conn,
62 bool proxy, /* if proxy or not */
63 const char *header) /* rest of the www-authenticate:
64 header */
65 {
66 /* point to the correct struct with this */
67 struct ntlmdata *ntlm;
68 CURLcode result = CURLE_OK;
69
70 ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
71
72 if(checkprefix("NTLM", header)) {
73 header += strlen("NTLM");
74
75 while(*header && ISSPACE(*header))
76 header++;
77
78 if(*header) {
79 result = Curl_auth_decode_ntlm_type2_message(conn->data, header, ntlm);
80 if(result)
81 return result;
82
83 ntlm->state = NTLMSTATE_TYPE2; /* We got a type-2 message */
84 }
85 else {
86 if(ntlm->state == NTLMSTATE_LAST) {
87 infof(conn->data, "NTLM auth restarted\n");
88 Curl_http_ntlm_cleanup(conn);
89 }
90 else if(ntlm->state == NTLMSTATE_TYPE3) {
91 infof(conn->data, "NTLM handshake rejected\n");
92 Curl_http_ntlm_cleanup(conn);
93 ntlm->state = NTLMSTATE_NONE;
94 return CURLE_REMOTE_ACCESS_DENIED;
95 }
96 else if(ntlm->state >= NTLMSTATE_TYPE1) {
97 infof(conn->data, "NTLM handshake failure (internal error)\n");
98 return CURLE_REMOTE_ACCESS_DENIED;
99 }
100
101 ntlm->state = NTLMSTATE_TYPE1; /* We should send away a type-1 */
102 }
103 }
104
105 return result;
106 }
107
108 /*
109 * This is for creating ntlm header output
110 */
Curl_output_ntlm(struct connectdata * conn,bool proxy)111 CURLcode Curl_output_ntlm(struct connectdata *conn, bool proxy)
112 {
113 char *base64 = NULL;
114 size_t len = 0;
115 CURLcode result;
116
117 /* point to the address of the pointer that holds the string to send to the
118 server, which is for a plain host or for a HTTP proxy */
119 char **allocuserpwd;
120
121 /* point to the name and password for this */
122 const char *userp;
123 const char *passwdp;
124
125 /* point to the correct struct with this */
126 struct ntlmdata *ntlm;
127 struct auth *authp;
128
129 DEBUGASSERT(conn);
130 DEBUGASSERT(conn->data);
131
132 #ifdef USE_NSS
133 if(CURLE_OK != Curl_nss_force_init(conn->data))
134 return CURLE_OUT_OF_MEMORY;
135 #endif
136
137 if(proxy) {
138 allocuserpwd = &conn->allocptr.proxyuserpwd;
139 userp = conn->http_proxy.user;
140 passwdp = conn->http_proxy.passwd;
141 ntlm = &conn->proxyntlm;
142 authp = &conn->data->state.authproxy;
143 }
144 else {
145 allocuserpwd = &conn->allocptr.userpwd;
146 userp = conn->user;
147 passwdp = conn->passwd;
148 ntlm = &conn->ntlm;
149 authp = &conn->data->state.authhost;
150 }
151 authp->done = FALSE;
152
153 /* not set means empty */
154 if(!userp)
155 userp = "";
156
157 if(!passwdp)
158 passwdp = "";
159
160 #ifdef USE_WINDOWS_SSPI
161 if(s_hSecDll == NULL) {
162 /* not thread safe and leaks - use curl_global_init() to avoid */
163 CURLcode err = Curl_sspi_global_init();
164 if(s_hSecDll == NULL)
165 return err;
166 }
167 #endif
168
169 switch(ntlm->state) {
170 case NTLMSTATE_TYPE1:
171 default: /* for the weird cases we (re)start here */
172 /* Create a type-1 message */
173 result = Curl_auth_create_ntlm_type1_message(userp, passwdp, ntlm, &base64,
174 &len);
175 if(result)
176 return result;
177
178 if(base64) {
179 free(*allocuserpwd);
180 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
181 proxy ? "Proxy-" : "",
182 base64);
183 free(base64);
184 if(!*allocuserpwd)
185 return CURLE_OUT_OF_MEMORY;
186
187 DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
188 }
189 break;
190
191 case NTLMSTATE_TYPE2:
192 /* We already received the type-2 message, create a type-3 message */
193 result = Curl_auth_create_ntlm_type3_message(conn->data, userp, passwdp,
194 ntlm, &base64, &len);
195 if(result)
196 return result;
197
198 if(base64) {
199 free(*allocuserpwd);
200 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
201 proxy ? "Proxy-" : "",
202 base64);
203 free(base64);
204 if(!*allocuserpwd)
205 return CURLE_OUT_OF_MEMORY;
206
207 DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
208
209 ntlm->state = NTLMSTATE_TYPE3; /* we send a type-3 */
210 authp->done = TRUE;
211 }
212 break;
213
214 case NTLMSTATE_TYPE3:
215 /* connection is already authenticated,
216 * don't send a header in future requests */
217 ntlm->state = NTLMSTATE_LAST;
218 /* fall-through */
219 case NTLMSTATE_LAST:
220 Curl_safefree(*allocuserpwd);
221 authp->done = TRUE;
222 break;
223 }
224
225 return CURLE_OK;
226 }
227
Curl_http_ntlm_cleanup(struct connectdata * conn)228 void Curl_http_ntlm_cleanup(struct connectdata *conn)
229 {
230 Curl_auth_ntlm_cleanup(&conn->ntlm);
231 Curl_auth_ntlm_cleanup(&conn->proxyntlm);
232
233 #if defined(NTLM_WB_ENABLED)
234 Curl_ntlm_wb_cleanup(conn);
235 #endif
236 }
237
238 #endif /* !CURL_DISABLE_HTTP && USE_NTLM */
239