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
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2003, 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 http://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.
*
* $Id$
***************************************************************************/
#include "setup.h"
#ifdef GSSAPI
#ifndef CURL_DISABLE_HTTP
/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include "urldata.h"
#include "sendf.h"
#include "strequal.h"
#include "http_negotiate.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
/* The last #include file should be: */
#ifdef MALLOCDEBUG
#include "memdebug.h"
#endif
static int
get_gss_name(struct connectdata *conn, gss_name_t *server)
{
OM_uint32 major_status, minor_status;
gss_buffer_desc token = GSS_C_EMPTY_BUFFER;
char name[2048];
#ifdef KRB5
token.length = strlen("khttp@") + strlen(conn->hostname) + 1;
#els
token.length = strlen("host/") + strlen(conn->hostname) + 1;
#endif
if (token.length + 1 > sizeof(name))
return EMSGSIZE;
#ifdef KRB5
sprintf(name, "khttp@%s", conn->hostname);
#else
sprintf(name, "host/%s", conn->hostname);
#endif
token.value = (void *) name;
major_status = gss_import_name(&minor_status,
&token,
GSS_C_NT_HOSTBASED_SERVICE,
server);
return GSS_ERROR(major_status) ? -1 : 0;
}
static void
log_gss_error(struct connectdata *conn, OM_uint32 error_status, char *prefix)
{
OM_uint32 maj_stat, min_stat;
OM_uint32 msg_ctx = 0;
gss_buffer_desc status_string;
char buf[1024];
size_t len;
snprintf(buf, sizeof(buf), "%s", prefix);
len = strlen(buf);
do {
maj_stat = gss_display_status (&min_stat,
error_status,
GSS_C_MECH_CODE,
GSS_C_NO_OID,
&msg_ctx,
&status_string);
if (sizeof(buf) > len + status_string.length + 1) {
sprintf(buf + len, ": %s", (char*) status_string.value);
len += status_string.length;
}
gss_release_buffer(&min_stat, &status_string);
} while (!GSS_ERROR(maj_stat) && msg_ctx != 0);
infof(conn->data, buf);
}
CURLcode Curl_input_negotiate(struct connectdata *conn, char *header)
{
struct negotiatedata *neg_ctx = &conn->data->state.negotiate;
OM_uint32 major_status, minor_status, minor_status2;
gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
int ret;
size_t len;
while(*header && isspace((int)*header))
header++;
if(!checkprefix("GSS-Negotiate", header))
return -1;
if (neg_ctx->context && neg_ctx->status == GSS_S_COMPLETE) {
/* We finished succesfully our part of authentication, but server
* rejected it (since we're again here). Exit with an error since we
* can't invent anything better */
Curl_cleanup_negotiate(conn->data);
return -1;
}
if (neg_ctx->server_name == NULL &&
(ret = get_gss_name(conn, &neg_ctx->server_name)))
return ret;
header += strlen("GSS-Negotiate");
while(*header && isspace((int)*header))
header++;
len = strlen(header);
if (len > 0) {
input_token.length = (len+3)/4 * 3;
input_token.value = malloc(input_token.length);
if (input_token.value == NULL)
return ENOMEM;
input_token.length = Curl_base64_decode(header, input_token.value);
if (input_token.length < 0)
return -1;
}
major_status = gss_init_sec_context(&minor_status,
GSS_C_NO_CREDENTIAL,
&neg_ctx->context,
neg_ctx->server_name,
GSS_C_NO_OID,
GSS_C_DELEG_FLAG,
0,
GSS_C_NO_CHANNEL_BINDINGS,
&input_token,
NULL,
&output_token,
NULL,
NULL);
if (input_token.length > 0)
gss_release_buffer(&minor_status2, &input_token);
neg_ctx->status = major_status;
if (GSS_ERROR(major_status)) {
/* Curl_cleanup_negotiate(conn->data) ??? */
log_gss_error(conn, minor_status, "gss_init_sec_context() failed: ");
return -1;
}
if (output_token.length == 0) {
return -1;
}
neg_ctx->output_token = output_token;
/* conn->bits.close = FALSE; */
return 0;
}
CURLcode Curl_output_negotiate(struct connectdata *conn)
{
struct negotiatedata *neg_ctx = &conn->data->state.negotiate;
OM_uint32 minor_status;
char *encoded = NULL;
size_t len;
len = Curl_base64_encode(neg_ctx->output_token.value,
neg_ctx->output_token.length,
&encoded);
if (len < 0)
return -1;
conn->allocptr.userpwd =
aprintf("Authorization: GSS-Negotiate %s\r\n", encoded);
free(encoded);
gss_release_buffer(&minor_status, &neg_ctx->output_token);
return (conn->allocptr.userpwd == NULL) ? ENOMEM : 0;
}
void Curl_cleanup_negotiate(struct SessionHandle *data)
{
OM_uint32 minor_status;
struct negotiatedata *neg_ctx = &data->state.negotiate;
if (neg_ctx->context != GSS_C_NO_CONTEXT)
gss_delete_sec_context(&minor_status, &neg_ctx->context, GSS_C_NO_BUFFER);
if (neg_ctx->output_token.length != 0)
gss_release_buffer(&minor_status, &neg_ctx->output_token);
if (neg_ctx->server_name != GSS_C_NO_NAME)
gss_release_name(&minor_status, &neg_ctx->server_name);
memset(neg_ctx, 0, sizeof(*neg_ctx));
}
#endif
#endif
|
