1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2011 - 2021, 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.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 /* The last 3 #include files should be in this order */
31 #include "curl_printf.h"
32 #include "curl_memory.h"
33 #include "memdebug.h"
34
35 gss_OID_desc Curl_spnego_mech_oid = {
36 6, (char *)"\x2b\x06\x01\x05\x05\x02"
37 };
38 gss_OID_desc Curl_krb5_mech_oid = {
39 9, (char *)"\x2a\x86\x48\x86\xf7\x12\x01\x02\x02"
40 };
41
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)42 OM_uint32 Curl_gss_init_sec_context(
43 struct Curl_easy *data,
44 OM_uint32 *minor_status,
45 gss_ctx_id_t *context,
46 gss_name_t target_name,
47 gss_OID mech_type,
48 gss_channel_bindings_t input_chan_bindings,
49 gss_buffer_t input_token,
50 gss_buffer_t output_token,
51 const bool mutual_auth,
52 OM_uint32 *ret_flags)
53 {
54 OM_uint32 req_flags = GSS_C_REPLAY_FLAG;
55
56 if(mutual_auth)
57 req_flags |= GSS_C_MUTUAL_FLAG;
58
59 if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_POLICY_FLAG) {
60 #ifdef GSS_C_DELEG_POLICY_FLAG
61 req_flags |= GSS_C_DELEG_POLICY_FLAG;
62 #else
63 infof(data, "warning: support for CURLGSSAPI_DELEGATION_POLICY_FLAG not "
64 "compiled in");
65 #endif
66 }
67
68 if(data->set.gssapi_delegation & CURLGSSAPI_DELEGATION_FLAG)
69 req_flags |= GSS_C_DELEG_FLAG;
70
71 return gss_init_sec_context(minor_status,
72 GSS_C_NO_CREDENTIAL, /* cred_handle */
73 context,
74 target_name,
75 mech_type,
76 req_flags,
77 0, /* time_req */
78 input_chan_bindings,
79 input_token,
80 NULL, /* actual_mech_type */
81 output_token,
82 ret_flags,
83 NULL /* time_rec */);
84 }
85
86 #define GSS_LOG_BUFFER_LEN 1024
display_gss_error(OM_uint32 status,int type,char * buf,size_t len)87 static size_t display_gss_error(OM_uint32 status, int type,
88 char *buf, size_t len) {
89 OM_uint32 maj_stat;
90 OM_uint32 min_stat;
91 OM_uint32 msg_ctx = 0;
92 gss_buffer_desc status_string;
93
94 do {
95 maj_stat = gss_display_status(&min_stat,
96 status,
97 type,
98 GSS_C_NO_OID,
99 &msg_ctx,
100 &status_string);
101 if(GSS_LOG_BUFFER_LEN > len + status_string.length + 3) {
102 len += msnprintf(buf + len, GSS_LOG_BUFFER_LEN - len,
103 "%.*s. ", (int)status_string.length,
104 (char *)status_string.value);
105 }
106 gss_release_buffer(&min_stat, &status_string);
107 } while(!GSS_ERROR(maj_stat) && msg_ctx);
108
109 return len;
110 }
111
112 /*
113 * Curl_gss_log_error()
114 *
115 * This is used to log a GSS-API error status.
116 *
117 * Parameters:
118 *
119 * data [in] - The session handle.
120 * prefix [in] - The prefix of the log message.
121 * major [in] - The major status code.
122 * minor [in] - The minor status code.
123 */
Curl_gss_log_error(struct Curl_easy * data,const char * prefix,OM_uint32 major,OM_uint32 minor)124 void Curl_gss_log_error(struct Curl_easy *data, const char *prefix,
125 OM_uint32 major, OM_uint32 minor)
126 {
127 char buf[GSS_LOG_BUFFER_LEN];
128 size_t len = 0;
129
130 if(major != GSS_S_FAILURE)
131 len = display_gss_error(major, GSS_C_GSS_CODE, buf, len);
132
133 display_gss_error(minor, GSS_C_MECH_CODE, buf, len);
134
135 infof(data, "%s%s", prefix, buf);
136 #ifdef CURL_DISABLE_VERBOSE_STRINGS
137 (void)data;
138 (void)prefix;
139 #endif
140 }
141
142 #endif /* HAVE_GSSAPI */
143