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1 /***************************************************************************
2  *                                  _   _ ____  _
3  *  Project                     ___| | | |  _ \| |
4  *                             / __| | | | |_) | |
5  *                            | (__| |_| |  _ <| |___
6  *                             \___|\___/|_| \_\_____|
7  *
8  * Copyright (C) 2011 - 2014, 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 #ifdef HAVE_GSSAPI
26 
27 #include "curl_gssapi.h"
28 #include "sendf.h"
29 
30 static const char spnego_oid_bytes[] = "\x2b\x06\x01\x05\x05\x02";
31 gss_OID_desc Curl_spnego_mech_oid = { 6, &spnego_oid_bytes };
32 static const char krb5_oid_bytes[] = "\x2a\x86\x48\x86\xf7\x12\x01\x02\x02";
33 gss_OID_desc Curl_krb5_mech_oid = { 9, &krb5_oid_bytes };
34 
Curl_gss_init_sec_context(struct SessionHandle * data,OM_uint32 * minor_status,gss_ctx_id_t * context,gss_name_t target_name,gss_OID mech_type,gss_channel_bindings_t input_chan_bindings,gss_buffer_t input_token,gss_buffer_t output_token,const bool mutual_auth,OM_uint32 * ret_flags)35 OM_uint32 Curl_gss_init_sec_context(
36     struct SessionHandle *data,
37     OM_uint32 *minor_status,
38     gss_ctx_id_t *context,
39     gss_name_t target_name,
40     gss_OID mech_type,
41     gss_channel_bindings_t input_chan_bindings,
42     gss_buffer_t input_token,
43     gss_buffer_t output_token,
44     const bool mutual_auth,
45     OM_uint32 *ret_flags)
46 {
47   OM_uint32 req_flags = GSS_C_REPLAY_FLAG;
48 
49   if(mutual_auth)
50     req_flags |= GSS_C_MUTUAL_FLAG;
51 
52   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) {
53 #ifdef GSS_C_DELEG_POLICY_FLAG
54     req_flags |= GSS_C_DELEG_POLICY_FLAG;
55 #else
56     infof(data, "warning: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not "
57         "compiled in\n");
58 #endif
59   }
60 
61   if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG)
62     req_flags |= GSS_C_DELEG_FLAG;
63 
64   return gss_init_sec_context(minor_status,
65                               GSS_C_NO_CREDENTIAL, /* cred_handle */
66                               context,
67                               target_name,
68                               mech_type,
69                               req_flags,
70                               0, /* time_req */
71                               input_chan_bindings,
72                               input_token,
73                               NULL, /* actual_mech_type */
74                               output_token,
75                               ret_flags,
76                               NULL /* time_rec */);
77 }
78 
79 /*
80  * Curl_gss_log_error()
81  *
82  * This is used to log a GSS-API error status.
83  *
84  * Parameters:
85  *
86  * data    [in] - The session handle.
87  * status  [in] - The status code.
88  * prefix  [in] - The prefix of the log message.
89  */
Curl_gss_log_error(struct SessionHandle * data,OM_uint32 status,const char * prefix)90 void Curl_gss_log_error(struct SessionHandle *data, OM_uint32 status,
91                         const char *prefix)
92 {
93   OM_uint32 maj_stat;
94   OM_uint32 min_stat;
95   OM_uint32 msg_ctx = 0;
96   gss_buffer_desc status_string;
97   char buf[1024];
98   size_t len;
99 
100   snprintf(buf, sizeof(buf), "%s", prefix);
101   len = strlen(buf);
102   do {
103     maj_stat = gss_display_status(&min_stat,
104                                   status,
105                                   GSS_C_MECH_CODE,
106                                   GSS_C_NO_OID,
107                                   &msg_ctx,
108                                   &status_string);
109     if(sizeof(buf) > len + status_string.length + 1) {
110       snprintf(buf + len, sizeof(buf) - len,
111         ": %s", (char*)status_string.value);
112       len += status_string.length;
113     }
114     gss_release_buffer(&min_stat, &status_string);
115   } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
116 
117   infof(data, "%s\n", buf);
118 }
119 
120 #endif /* HAVE_GSSAPI */
121