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