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_SPNEGO)
26 
27 #include "urldata.h"
28 #include "sendf.h"
29 #include "http_negotiate.h"
30 #include "vauth/vauth.h"
31 
32 /* The last 3 #include files should be in this order */
33 #include "curl_printf.h"
34 #include "curl_memory.h"
35 #include "memdebug.h"
36 
37 CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
38                               const char *header)
39 {
40   CURLcode result;
41   struct Curl_easy *data = conn->data;
42   size_t len;
43 
44   /* Point to the username, password, service and host */
45   const char *userp;
46   const char *passwdp;
47   const char *service;
48   const char *host;
49 
50   /* Point to the correct struct with this */
51   struct negotiatedata *neg_ctx;
52 
53   if(proxy) {
54     userp = conn->http_proxy.user;
55     passwdp = conn->http_proxy.passwd;
56     service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
57               data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
58     host = conn->http_proxy.host.name;
59     neg_ctx = &data->state.proxyneg;
60   }
61   else {
62     userp = conn->user;
63     passwdp = conn->passwd;
64     service = data->set.str[STRING_SERVICE_NAME] ?
65               data->set.str[STRING_SERVICE_NAME] : "HTTP";
66     host = conn->host.name;
67     neg_ctx = &data->state.negotiate;
68   }
69 
70   /* Not set means empty */
71   if(!userp)
72     userp = "";
73 
74   if(!passwdp)
75     passwdp = "";
76 
77   /* Obtain the input token, if any */
78   header += strlen("Negotiate");
79   while(*header && ISSPACE(*header))
80     header++;
81 
82   len = strlen(header);
83   if(!len) {
84     /* Is this the first call in a new negotiation? */
85     if(neg_ctx->context) {
86       /* The server rejected our authentication and hasn't suppled any more
87       negotiation mechanisms */
88       return CURLE_LOGIN_DENIED;
89     }
90   }
91 
92   /* Initilise the security context and decode our challenge */
93   result = Curl_auth_decode_spnego_message(data, userp, passwdp, service,
94                                            host, header, neg_ctx);
95 
96   if(result)
97     Curl_auth_spnego_cleanup(neg_ctx);
98 
99   return result;
100 }
101 
102 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
103 {
104   struct negotiatedata *neg_ctx = proxy ? &conn->data->state.proxyneg :
105     &conn->data->state.negotiate;
106   char *base64 = NULL;
107   size_t len = 0;
108   char *userp;
109   CURLcode result;
110 
111   result = Curl_auth_create_spnego_message(conn->data, neg_ctx, &base64, &len);
112   if(result)
113     return result;
114 
115   userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
116                   base64);
117 
118   if(proxy) {
119     Curl_safefree(conn->allocptr.proxyuserpwd);
120     conn->allocptr.proxyuserpwd = userp;
121   }
122   else {
123     Curl_safefree(conn->allocptr.userpwd);
124     conn->allocptr.userpwd = userp;
125   }
126 
127   free(base64);
128 
129   return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
130 }
131 
132 void Curl_cleanup_negotiate(struct Curl_easy *data)
133 {
134   Curl_auth_spnego_cleanup(&data->state.negotiate);
135   Curl_auth_spnego_cleanup(&data->state.proxyneg);
136 }
137 
138 #endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */
139