1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, 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(USE_WINDOWS_SSPI)
48#include "curl_sspi.h"
49#endif
50
51/* The last 3 #include files should be in this order */
52#include "curl_printf.h"
53#include "curl_memory.h"
54#include "memdebug.h"
55
56#if DEBUG_ME
57# define DEBUG_OUT(x) x
58#else
59# define DEBUG_OUT(x) Curl_nop_stmt
60#endif
61
62CURLcode Curl_input_ntlm(struct connectdata *conn,
63 bool proxy, /* if proxy or not */
64 const char *header) /* rest of the www-authenticate:
65 header */
66{
67 /* point to the correct struct with this */
68 struct ntlmdata *ntlm;
69 curlntlm *state;
70 CURLcode result = CURLE_OK;
71
72 ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
73 state = proxy ? &conn->proxy_ntlm_state : &conn->http_ntlm_state;
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 *state = NTLMSTATE_TYPE2; /* We got a type-2 message */
87 }
88 else {
89 if(*state == NTLMSTATE_LAST) {
90 infof(conn->data, "NTLM auth restarted\n");
91 Curl_http_auth_cleanup_ntlm(conn);
92 }
93 else if(*state == NTLMSTATE_TYPE3) {
94 infof(conn->data, "NTLM handshake rejected\n");
95 Curl_http_auth_cleanup_ntlm(conn);
96 *state = NTLMSTATE_NONE;
97 return CURLE_REMOTE_ACCESS_DENIED;
98 }
99 else if(*state >= NTLMSTATE_TYPE1) {
100 infof(conn->data, "NTLM handshake failure (internal error)\n");
101 return CURLE_REMOTE_ACCESS_DENIED;
102 }
103
104 *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 */
114CURLcode 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 curlntlm *state;
133 struct auth *authp;
134
135 DEBUGASSERT(conn);
136 DEBUGASSERT(conn->data);
137
138 if(proxy) {
139 allocuserpwd = &conn->allocptr.proxyuserpwd;
140 userp = conn->http_proxy.user;
141 passwdp = conn->http_proxy.passwd;
142 service = conn->data->set.str[STRING_PROXY_SERVICE_NAME] ?
143 conn->data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
144 hostname = conn->http_proxy.host.name;
145 ntlm = &conn->proxyntlm;
146 state = &conn->proxy_ntlm_state;
147 authp = &conn->data->state.authproxy;
148 }
149 else {
150 allocuserpwd = &conn->allocptr.userpwd;
151 userp = conn->user;
152 passwdp = conn->passwd;
153 service = conn->data->set.str[STRING_SERVICE_NAME] ?
154 conn->data->set.str[STRING_SERVICE_NAME] : "HTTP";
155 hostname = conn->host.name;
156 ntlm = &conn->ntlm;
157 state = &conn->http_ntlm_state;
158 authp = &conn->data->state.authhost;
159 }
160 authp->done = FALSE;
161
162 /* not set means empty */
163 if(!userp)
164 userp = "";
165
166 if(!passwdp)
167 passwdp = "";
168
169#ifdef USE_WINDOWS_SSPI
170 if(s_hSecDll == NULL) {
171 /* not thread safe and leaks - use curl_global_init() to avoid */
172 CURLcode err = Curl_sspi_global_init();
173 if(s_hSecDll == NULL)
174 return err;
175 }
176#ifdef SECPKG_ATTR_ENDPOINT_BINDINGS
177 ntlm->sslContext = conn->sslContext;
178#endif
179#endif
180
181 switch(*state) {
182 case NTLMSTATE_TYPE1:
183 default: /* for the weird cases we (re)start here */
184 /* Create a type-1 message */
185 result = Curl_auth_create_ntlm_type1_message(conn->data, userp, passwdp,
186 service, hostname,
187 ntlm, &base64,
188 &len);
189 if(result)
190 return result;
191
192 if(base64) {
193 free(*allocuserpwd);
194 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
195 proxy ? "Proxy-" : "",
196 base64);
197 free(base64);
198 if(!*allocuserpwd)
199 return CURLE_OUT_OF_MEMORY;
200
201 DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
202 }
203 break;
204
205 case NTLMSTATE_TYPE2:
206 /* We already received the type-2 message, create a type-3 message */
207 result = Curl_auth_create_ntlm_type3_message(conn->data, userp, passwdp,
208 ntlm, &base64, &len);
209 if(result)
210 return result;
211
212 if(base64) {
213 free(*allocuserpwd);
214 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
215 proxy ? "Proxy-" : "",
216 base64);
217 free(base64);
218 if(!*allocuserpwd)
219 return CURLE_OUT_OF_MEMORY;
220
221 DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
222
223 *state = NTLMSTATE_TYPE3; /* we send a type-3 */
224 authp->done = TRUE;
225 }
226 break;
227
228 case NTLMSTATE_TYPE3:
229 /* connection is already authenticated,
230 * don't send a header in future requests */
231 *state = NTLMSTATE_LAST;
232 /* FALLTHROUGH */
233 case NTLMSTATE_LAST:
234 Curl_safefree(*allocuserpwd);
235 authp->done = TRUE;
236 break;
237 }
238
239 return CURLE_OK;
240}
241
242void Curl_http_auth_cleanup_ntlm(struct connectdata *conn)
243{
244 Curl_auth_cleanup_ntlm(&conn->ntlm);
245 Curl_auth_cleanup_ntlm(&conn->proxyntlm);
246
247#if defined(NTLM_WB_ENABLED)
248 Curl_http_auth_cleanup_ntlm_wb(conn);
249#endif
250}
251
252#endif /* !CURL_DISABLE_HTTP && USE_NTLM */
253