1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, 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 http://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 * http://www.innovation.ch/java/ntlm.html
32 */
33
34 #define DEBUG_ME 0
35
36 #include "urldata.h"
37 #include "sendf.h"
38 #include "rawstr.h"
39 #include "curl_ntlm.h"
40 #include "curl_ntlm_msgs.h"
41 #include "curl_ntlm_wb.h"
42 #include "curl_sasl.h"
43 #include "url.h"
44 #include "curl_printf.h"
45
46 #if defined(USE_NSS)
47 #include "vtls/nssg.h"
48 #elif defined(USE_WINDOWS_SSPI)
49 #include "curl_sspi.h"
50 #endif
51
52 /* The last #include files should be: */
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
Curl_input_ntlm(struct connectdata * conn,bool proxy,const char * header)62 CURLcode 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 CURLcode result = CURLE_OK;
70
71 ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
72
73 if(checkprefix("NTLM", header)) {
74 header += strlen("NTLM");
75
76 while(*header && ISSPACE(*header))
77 header++;
78
79 if(*header) {
80 result = Curl_sasl_decode_ntlm_type2_message(conn->data, header, ntlm);
81 if(result)
82 return result;
83
84 ntlm->state = NTLMSTATE_TYPE2; /* We got a type-2 message */
85 }
86 else {
87 if(ntlm->state == NTLMSTATE_TYPE3) {
88 infof(conn->data, "NTLM handshake rejected\n");
89 Curl_http_ntlm_cleanup(conn);
90 ntlm->state = NTLMSTATE_NONE;
91 return CURLE_REMOTE_ACCESS_DENIED;
92 }
93 else if(ntlm->state >= NTLMSTATE_TYPE1) {
94 infof(conn->data, "NTLM handshake failure (internal error)\n");
95 return CURLE_REMOTE_ACCESS_DENIED;
96 }
97
98 ntlm->state = NTLMSTATE_TYPE1; /* We should send away a type-1 */
99 }
100 }
101
102 return result;
103 }
104
105 /*
106 * This is for creating ntlm header output
107 */
Curl_output_ntlm(struct connectdata * conn,bool proxy)108 CURLcode Curl_output_ntlm(struct connectdata *conn, bool proxy)
109 {
110 char *base64 = NULL;
111 size_t len = 0;
112 CURLcode result;
113
114 /* point to the address of the pointer that holds the string to send to the
115 server, which is for a plain host or for a HTTP proxy */
116 char **allocuserpwd;
117
118 /* point to the name and password for this */
119 const char *userp;
120 const char *passwdp;
121
122 /* point to the correct struct with this */
123 struct ntlmdata *ntlm;
124 struct auth *authp;
125
126 DEBUGASSERT(conn);
127 DEBUGASSERT(conn->data);
128
129 #ifdef USE_NSS
130 if(CURLE_OK != Curl_nss_force_init(conn->data))
131 return CURLE_OUT_OF_MEMORY;
132 #endif
133
134 if(proxy) {
135 allocuserpwd = &conn->allocptr.proxyuserpwd;
136 userp = conn->proxyuser;
137 passwdp = conn->proxypasswd;
138 ntlm = &conn->proxyntlm;
139 authp = &conn->data->state.authproxy;
140 }
141 else {
142 allocuserpwd = &conn->allocptr.userpwd;
143 userp = conn->user;
144 passwdp = conn->passwd;
145 ntlm = &conn->ntlm;
146 authp = &conn->data->state.authhost;
147 }
148 authp->done = FALSE;
149
150 /* not set means empty */
151 if(!userp)
152 userp = "";
153
154 if(!passwdp)
155 passwdp = "";
156
157 #ifdef USE_WINDOWS_SSPI
158 if(s_hSecDll == NULL) {
159 /* not thread safe and leaks - use curl_global_init() to avoid */
160 CURLcode err = Curl_sspi_global_init();
161 if(s_hSecDll == NULL)
162 return err;
163 }
164 #endif
165
166 switch(ntlm->state) {
167 case NTLMSTATE_TYPE1:
168 default: /* for the weird cases we (re)start here */
169 /* Create a type-1 message */
170 result = Curl_sasl_create_ntlm_type1_message(userp, passwdp, ntlm, &base64,
171 &len);
172 if(result)
173 return result;
174
175 if(base64) {
176 free(*allocuserpwd);
177 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
178 proxy ? "Proxy-" : "",
179 base64);
180 free(base64);
181 if(!*allocuserpwd)
182 return CURLE_OUT_OF_MEMORY;
183
184 DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
185 }
186 break;
187
188 case NTLMSTATE_TYPE2:
189 /* We already received the type-2 message, create a type-3 message */
190 result = Curl_sasl_create_ntlm_type3_message(conn->data, userp, passwdp,
191 ntlm, &base64, &len);
192 if(result)
193 return result;
194
195 if(base64) {
196 free(*allocuserpwd);
197 *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
198 proxy ? "Proxy-" : "",
199 base64);
200 free(base64);
201 if(!*allocuserpwd)
202 return CURLE_OUT_OF_MEMORY;
203
204 DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
205
206 ntlm->state = NTLMSTATE_TYPE3; /* we send a type-3 */
207 authp->done = TRUE;
208 }
209 break;
210
211 case NTLMSTATE_TYPE3:
212 /* connection is already authenticated,
213 * don't send a header in future requests */
214 Curl_safefree(*allocuserpwd);
215 authp->done = TRUE;
216 break;
217 }
218
219 return CURLE_OK;
220 }
221
Curl_http_ntlm_cleanup(struct connectdata * conn)222 void Curl_http_ntlm_cleanup(struct connectdata *conn)
223 {
224 Curl_sasl_ntlm_cleanup(&conn->ntlm);
225 Curl_sasl_ntlm_cleanup(&conn->proxyntlm);
226
227 #if defined(NTLM_WB_ENABLED)
228 Curl_ntlm_wb_cleanup(conn);
229 #endif
230 }
231
232 #endif /* !CURL_DISABLE_HTTP && USE_NTLM */
233