1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2011 - 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 #ifdef HAVE_GSSAPI
26
27 #include "curl_gssapi.h"
28 #include "sendf.h"
29
30 static char spnego_oid_bytes[] = "\x2b\x06\x01\x05\x05\x02";
31 gss_OID_desc Curl_spnego_mech_oid = { 6, &spnego_oid_bytes };
32 static 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 Curl_easy * 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 Curl_easy *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 #define GSS_LOG_BUFFER_LEN 1024
display_gss_error(OM_uint32 status,int type,char * buf,size_t len)80 static size_t display_gss_error(OM_uint32 status, int type,
81 char *buf, size_t len) {
82 OM_uint32 maj_stat;
83 OM_uint32 min_stat;
84 OM_uint32 msg_ctx = 0;
85 gss_buffer_desc status_string;
86
87 do {
88 maj_stat = gss_display_status(&min_stat,
89 status,
90 type,
91 GSS_C_NO_OID,
92 &msg_ctx,
93 &status_string);
94 if(GSS_LOG_BUFFER_LEN > len + status_string.length + 3) {
95 len += snprintf(buf + len, GSS_LOG_BUFFER_LEN - len,
96 "%.*s. ", (int)status_string.length,
97 (char *)status_string.value);
98 }
99 gss_release_buffer(&min_stat, &status_string);
100 } while(!GSS_ERROR(maj_stat) && msg_ctx != 0);
101
102 return len;
103 }
104
105 /*
106 * Curl_gss_log_error()
107 *
108 * This is used to log a GSS-API error status.
109 *
110 * Parameters:
111 *
112 * data [in] - The session handle.
113 * prefix [in] - The prefix of the log message.
114 * major [in] - The major status code.
115 * minor [in] - The minor status code.
116 */
Curl_gss_log_error(struct Curl_easy * data,const char * prefix,OM_uint32 major,OM_uint32 minor)117 void Curl_gss_log_error(struct Curl_easy *data, const char *prefix,
118 OM_uint32 major, OM_uint32 minor)
119 {
120 char buf[GSS_LOG_BUFFER_LEN];
121 size_t len = 0;
122
123 if(major != GSS_S_FAILURE)
124 len = display_gss_error(major, GSS_C_GSS_CODE, buf, len);
125
126 display_gss_error(minor, GSS_C_MECH_CODE, buf, len);
127
128 infof(data, "%s%s\n", prefix, buf);
129 }
130
131 #endif /* HAVE_GSSAPI */
132