1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#if !defined(CURL_DISABLE_HTTP) && defined(USE_SPNEGO)
#include "urldata.h"
#include "sendf.h"
#include "http_negotiate.h"
#include "vauth/vauth.h"
/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"
CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
const char *header)
{
CURLcode result;
struct Curl_easy *data = conn->data;
size_t len;
/* Point to the username, password, service and host */
const char *userp;
const char *passwdp;
const char *service;
const char *host;
/* Point to the correct struct with this */
struct negotiatedata *neg_ctx;
curlnegotiate state;
if(proxy) {
#ifndef CURL_DISABLE_PROXY
userp = conn->http_proxy.user;
passwdp = conn->http_proxy.passwd;
service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
host = conn->http_proxy.host.name;
neg_ctx = &conn->proxyneg;
state = conn->proxy_negotiate_state;
#else
return CURLE_NOT_BUILT_IN;
#endif
}
else {
userp = conn->user;
passwdp = conn->passwd;
service = data->set.str[STRING_SERVICE_NAME] ?
data->set.str[STRING_SERVICE_NAME] : "HTTP";
host = conn->host.name;
neg_ctx = &conn->negotiate;
state = conn->http_negotiate_state;
}
/* Not set means empty */
if(!userp)
userp = "";
if(!passwdp)
passwdp = "";
/* Obtain the input token, if any */
header += strlen("Negotiate");
while(*header && ISSPACE(*header))
header++;
len = strlen(header);
neg_ctx->havenegdata = len != 0;
if(!len) {
if(state == GSS_AUTHSUCC) {
infof(conn->data, "Negotiate auth restarted\n");
Curl_http_auth_cleanup_negotiate(conn);
}
else if(state != GSS_AUTHNONE) {
/* The server rejected our authentication and hasn't supplied any more
negotiation mechanisms */
Curl_http_auth_cleanup_negotiate(conn);
return CURLE_LOGIN_DENIED;
}
}
/* Supports SSL channel binding for Windows ISS extended protection */
#if defined(USE_WINDOWS_SSPI) && defined(SECPKG_ATTR_ENDPOINT_BINDINGS)
neg_ctx->sslContext = conn->sslContext;
#endif
/* Initialize the security context and decode our challenge */
result = Curl_auth_decode_spnego_message(data, userp, passwdp, service,
host, header, neg_ctx);
if(result)
Curl_http_auth_cleanup_negotiate(conn);
return result;
}
CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
{
struct negotiatedata *neg_ctx = proxy ? &conn->proxyneg :
&conn->negotiate;
struct auth *authp = proxy ? &conn->data->state.authproxy :
&conn->data->state.authhost;
curlnegotiate *state = proxy ? &conn->proxy_negotiate_state :
&conn->http_negotiate_state;
struct Curl_easy *data = conn->data;
char *base64 = NULL;
size_t len = 0;
char *userp;
CURLcode result;
authp->done = FALSE;
if(*state == GSS_AUTHRECV) {
if(neg_ctx->havenegdata) {
neg_ctx->havemultiplerequests = TRUE;
}
}
else if(*state == GSS_AUTHSUCC) {
if(!neg_ctx->havenoauthpersist) {
neg_ctx->noauthpersist = !neg_ctx->havemultiplerequests;
}
}
if(neg_ctx->noauthpersist ||
(*state != GSS_AUTHDONE && *state != GSS_AUTHSUCC)) {
if(neg_ctx->noauthpersist && *state == GSS_AUTHSUCC) {
infof(conn->data, "Curl_output_negotiate, "
"no persistent authentication: cleanup existing context");
Curl_http_auth_cleanup_negotiate(conn);
}
if(!neg_ctx->context) {
result = Curl_input_negotiate(conn, proxy, "Negotiate");
if(result == CURLE_AUTH_ERROR) {
/* negotiate auth failed, let's continue unauthenticated to stay
* compatible with the behavior before curl-7_64_0-158-g6c6035532 */
authp->done = TRUE;
return CURLE_OK;
}
else if(result)
return result;
}
result = Curl_auth_create_spnego_message(conn->data,
neg_ctx, &base64, &len);
if(result)
return result;
userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
base64);
if(proxy) {
Curl_safefree(data->state.aptr.proxyuserpwd);
data->state.aptr.proxyuserpwd = userp;
}
else {
Curl_safefree(data->state.aptr.userpwd);
data->state.aptr.userpwd = userp;
}
free(base64);
if(userp == NULL) {
return CURLE_OUT_OF_MEMORY;
}
*state = GSS_AUTHSENT;
#ifdef HAVE_GSSAPI
if(neg_ctx->status == GSS_S_COMPLETE ||
neg_ctx->status == GSS_S_CONTINUE_NEEDED) {
*state = GSS_AUTHDONE;
}
#else
#ifdef USE_WINDOWS_SSPI
if(neg_ctx->status == SEC_E_OK ||
neg_ctx->status == SEC_I_CONTINUE_NEEDED) {
*state = GSS_AUTHDONE;
}
#endif
#endif
}
if(*state == GSS_AUTHDONE || *state == GSS_AUTHSUCC) {
/* connection is already authenticated,
* don't send a header in future requests */
authp->done = TRUE;
}
neg_ctx->havenegdata = FALSE;
return CURLE_OK;
}
void Curl_http_auth_cleanup_negotiate(struct connectdata *conn)
{
conn->http_negotiate_state = GSS_AUTHNONE;
conn->proxy_negotiate_state = GSS_AUTHNONE;
Curl_auth_cleanup_spnego(&conn->negotiate);
Curl_auth_cleanup_spnego(&conn->proxyneg);
}
#endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */
|
