1 /* $NetBSD: display_status.c,v 1.1.1.1 2011/04/13 18:14:45 elric Exp $ */
2
3 /*
4 * Copyright (c) 1998 - 2006 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "gsskrb5_locl.h"
37
38 static const char *
calling_error(OM_uint32 v)39 calling_error(OM_uint32 v)
40 {
41 static const char *msgs[] = {
42 NULL, /* 0 */
43 "A required input parameter could not be read.", /* */
44 "A required output parameter could not be written.", /* */
45 "A parameter was malformed"
46 };
47
48 v >>= GSS_C_CALLING_ERROR_OFFSET;
49
50 if (v == 0)
51 return "";
52 else if (v >= sizeof(msgs)/sizeof(*msgs))
53 return "unknown calling error";
54 else
55 return msgs[v];
56 }
57
58 static const char *
routine_error(OM_uint32 v)59 routine_error(OM_uint32 v)
60 {
61 static const char *msgs[] = {
62 NULL, /* 0 */
63 "An unsupported mechanism was requested",
64 "An invalid name was supplied",
65 "A supplied name was of an unsupported type",
66 "Incorrect channel bindings were supplied",
67 "An invalid status code was supplied",
68 "A token had an invalid MIC",
69 "No credentials were supplied, "
70 "or the credentials were unavailable or inaccessible.",
71 "No context has been established",
72 "A token was invalid",
73 "A credential was invalid",
74 "The referenced credentials have expired",
75 "The context has expired",
76 "Miscellaneous failure (see text)",
77 "The quality-of-protection requested could not be provide",
78 "The operation is forbidden by local security policy",
79 "The operation or option is not available",
80 "The requested credential element already exists",
81 "The provided name was not a mechanism name.",
82 };
83
84 v >>= GSS_C_ROUTINE_ERROR_OFFSET;
85
86 if (v == 0)
87 return "";
88 else if (v >= sizeof(msgs)/sizeof(*msgs))
89 return "unknown routine error";
90 else
91 return msgs[v];
92 }
93
94 static const char *
supplementary_error(OM_uint32 v)95 supplementary_error(OM_uint32 v)
96 {
97 static const char *msgs[] = {
98 "normal completion",
99 "continuation call to routine required",
100 "duplicate per-message token detected",
101 "timed-out per-message token detected",
102 "reordered (early) per-message token detected",
103 "skipped predecessor token(s) detected"
104 };
105
106 v >>= GSS_C_SUPPLEMENTARY_OFFSET;
107
108 if (v >= sizeof(msgs)/sizeof(*msgs))
109 return "unknown routine error";
110 else
111 return msgs[v];
112 }
113
114 void
_gsskrb5_clear_status(void)115 _gsskrb5_clear_status (void)
116 {
117 krb5_context context;
118
119 if (_gsskrb5_init (&context) != 0)
120 return;
121 krb5_clear_error_message(context);
122 }
123
124 void
_gsskrb5_set_status(int ret,const char * fmt,...)125 _gsskrb5_set_status (int ret, const char *fmt, ...)
126 {
127 krb5_context context;
128 va_list args;
129 char *str;
130 int e;
131
132 if (_gsskrb5_init (&context) != 0)
133 return;
134
135 va_start(args, fmt);
136 e = vasprintf(&str, fmt, args);
137 va_end(args);
138 if (e >= 0 && str) {
139 krb5_set_error_message(context, ret, "%s", str);
140 free(str);
141 }
142 }
143
_gsskrb5_display_status(OM_uint32 * minor_status,OM_uint32 status_value,int status_type,const gss_OID mech_type,OM_uint32 * message_context,gss_buffer_t status_string)144 OM_uint32 GSSAPI_CALLCONV _gsskrb5_display_status
145 (OM_uint32 *minor_status,
146 OM_uint32 status_value,
147 int status_type,
148 const gss_OID mech_type,
149 OM_uint32 *message_context,
150 gss_buffer_t status_string)
151 {
152 krb5_context context;
153 char *buf = NULL;
154 int e = 0;
155
156 GSSAPI_KRB5_INIT (&context);
157
158 status_string->length = 0;
159 status_string->value = NULL;
160
161 if (gss_oid_equal(mech_type, GSS_C_NO_OID) == 0 &&
162 gss_oid_equal(mech_type, GSS_KRB5_MECHANISM) == 0) {
163 *minor_status = 0;
164 return GSS_C_GSS_CODE;
165 }
166
167 if (status_type == GSS_C_GSS_CODE) {
168 if (GSS_SUPPLEMENTARY_INFO(status_value))
169 e = asprintf(&buf, "%s",
170 supplementary_error(GSS_SUPPLEMENTARY_INFO(status_value)));
171 else
172 e = asprintf (&buf, "%s %s",
173 calling_error(GSS_CALLING_ERROR(status_value)),
174 routine_error(GSS_ROUTINE_ERROR(status_value)));
175 } else if (status_type == GSS_C_MECH_CODE) {
176 const char *buf2 = krb5_get_error_message(context, status_value);
177 if (buf2) {
178 buf = strdup(buf2);
179 krb5_free_error_message(context, buf2);
180 } else {
181 e = asprintf(&buf, "unknown mech error-code %u",
182 (unsigned)status_value);
183 }
184 } else {
185 *minor_status = EINVAL;
186 return GSS_S_BAD_STATUS;
187 }
188
189 if (e < 0 || buf == NULL) {
190 *minor_status = ENOMEM;
191 return GSS_S_FAILURE;
192 }
193
194 *message_context = 0;
195 *minor_status = 0;
196
197 status_string->length = strlen(buf);
198 status_string->value = buf;
199
200 return GSS_S_COMPLETE;
201 }
202