aboutsummaryrefslogtreecommitdiff
path: root/lib/libgssapi/gss_display_status.c
blob: 55ca83ce9aa849e9829cb118ad94837befc3d826 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2005 Doug Rabson
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$FreeBSD$
 */
/*
 * Copyright (c) 1998 - 2005 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */
/*
 * Copyright (c) 1998 - 2005 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden). 
 * All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 *
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright 
 *    notice, this list of conditions and the following disclaimer in the 
 *    documentation and/or other materials provided with the distribution. 
 *
 * 3. Neither the name of the Institute nor the names of its contributors 
 *    may be used to endorse or promote products derived from this software 
 *    without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE. 
 */

#include <sys/param.h>
#include <gssapi/gssapi.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>

#include "mech_switch.h"
#include "utils.h"

static const char *
calling_error(OM_uint32 v)
{
    static const char *msgs[] = {
	[0] = "",
	[1] = "A required input parameter could not be read.",
	[2] = "A required output parameter could not be written.",
	[3] = "A parameter was malformed",
    };

    v >>= GSS_C_CALLING_ERROR_OFFSET;

    if (v >= nitems(msgs))
	return "unknown calling error";
    else
	return msgs[v];
}

static const char *
routine_error(OM_uint32 v)
{
    static const char *msgs[] = {
	[0] = "Function completed successfully",
	[1] = "An unsupported mechanism was requested",
	[2] = "An invalid name was supplied",
	[3] = "A supplied name was of an unsupported type",
	[4] = "Incorrect channel bindings were supplied",
	[5] = "An invalid status code was supplied",
	[6] = "A token had an invalid MIC",
	[7] = ("No credentials were supplied, "
	    "or the credentials were unavailable or inaccessible."),
	[8] = "No context has been established",
	[9] = "A token was invalid",
	[10] = "A credential was invalid",
	[11] =  "The referenced credentials have expired",
	[12] = "The context has expired",
	[13] = "Miscellaneous failure (see text)",
	[14] = "The quality-of-protection requested could not be provide",
	[15] = "The operation is forbidden by local security policy",
	[16] = "The operation or option is not available",
	[17] = "The requested credential element already exists",
	[18] = "The provided name was not a mechanism name.",
    };

    v >>= GSS_C_ROUTINE_ERROR_OFFSET;

    if (v >= nitems(msgs))
	return "unknown routine error";
    else
	return msgs[v];
}

static const char *
supplementary_error(OM_uint32 v)
{
    static const char *msgs[] = {
	[0] = "normal completion",
	[1] = "continuation call to routine required",
	[2] = "duplicate per-message token detected",
	[3] = "timed-out per-message token detected",
	[4] = "reordered (early) per-message token detected",
	[5] = "skipped predecessor token(s) detected",
    };

    v >>= GSS_C_SUPPLEMENTARY_OFFSET;

    if (v >= nitems(msgs))
	return "unknown routine error";
    else
	return msgs[v];
}

#if defined(__NO_TLS)

/*
 * These platforms don't support TLS on FreeBSD - threads will just
 * have to step on each other's error values for now.
 */
#define __thread

#endif

struct mg_thread_ctx {
    gss_OID mech;
    OM_uint32 maj_stat;
    OM_uint32 min_stat;
    gss_buffer_desc maj_error;
    gss_buffer_desc min_error;
};
static __thread struct mg_thread_ctx last_error_context;

static OM_uint32
_gss_mg_get_error(const gss_OID mech, OM_uint32 type,
		  OM_uint32 value, gss_buffer_t string)
{
	struct mg_thread_ctx *mg;

	mg = &last_error_context;

	if (mech != NULL && gss_oid_equal(mg->mech, mech) == 0)
		return (GSS_S_BAD_STATUS);

	switch (type) {
	case GSS_C_GSS_CODE: {
		if (value != mg->maj_stat || mg->maj_error.length == 0)
			break;
		string->value = malloc(mg->maj_error.length);
		string->length = mg->maj_error.length;
		memcpy(string->value, mg->maj_error.value,
		    mg->maj_error.length);
		return (GSS_S_COMPLETE);
	}
	case GSS_C_MECH_CODE: {
		if (value != mg->min_stat || mg->min_error.length == 0)
			break;
		string->value = malloc(mg->min_error.length);
		string->length = mg->min_error.length;
		memcpy(string->value, mg->min_error.value,
		    mg->min_error.length);
		return (GSS_S_COMPLETE);
	}
	}
	string->value = NULL;
	string->length = 0;
	return (GSS_S_BAD_STATUS);
}

void
_gss_mg_error(struct _gss_mech_switch *m, OM_uint32 maj, OM_uint32 min)
{
	OM_uint32 major_status, minor_status;
	OM_uint32 message_content;
	struct mg_thread_ctx *mg;

	mg = &last_error_context;

	gss_release_buffer(&minor_status, &mg->maj_error);
	gss_release_buffer(&minor_status, &mg->min_error);

	mg->mech = &m->gm_mech_oid;
	mg->maj_stat = maj;
	mg->min_stat = min;

	major_status = m->gm_display_status(&minor_status,
	    maj, 
	    GSS_C_GSS_CODE,
	    &m->gm_mech_oid,
	    &message_content,
	    &mg->maj_error);
	if (GSS_ERROR(major_status)) {
		mg->maj_error.value = NULL;
		mg->maj_error.length = 0;
	}
	major_status = m->gm_display_status(&minor_status,
	    min, 
	    GSS_C_MECH_CODE,
	    &m->gm_mech_oid,
	    &message_content,
	    &mg->min_error);
	if (GSS_ERROR(major_status)) {
		mg->min_error.value = NULL;
		mg->min_error.length = 0;
	}
}

OM_uint32
gss_display_status(OM_uint32 *minor_status,
    OM_uint32 status_value,
    int status_type,
    const gss_OID mech_type,
    OM_uint32 *message_content,
    gss_buffer_t status_string)
{
	OM_uint32 major_status;

	_gss_buffer_zero(status_string);
	*message_content = 0;

	major_status = _gss_mg_get_error(mech_type, status_type,
					 status_value, status_string);
	if (major_status == GSS_S_COMPLETE) {

		*message_content = 0;
		*minor_status = 0;
		return (GSS_S_COMPLETE);
	}

	*minor_status = 0;
	switch (status_type) {
	case GSS_C_GSS_CODE: {
		char *buf;

		if (GSS_SUPPLEMENTARY_INFO(status_value))
		    asprintf(&buf, "%s", supplementary_error(
		        GSS_SUPPLEMENTARY_INFO(status_value)));
		else
		    asprintf (&buf, "%s %s",
		        calling_error(GSS_CALLING_ERROR(status_value)),
			routine_error(GSS_ROUTINE_ERROR(status_value)));

		if (buf == NULL)
			break;

		status_string->length = strlen(buf);
		status_string->value  = buf;

		return (GSS_S_COMPLETE);
	}
	case GSS_C_MECH_CODE: {
		OM_uint32 maj_junk, min_junk;
		gss_buffer_desc oid;
		char *buf;

		maj_junk = gss_oid_to_str(&min_junk, mech_type, &oid);
		if (maj_junk != GSS_S_COMPLETE) {
			oid.value = strdup("unknown");
			oid.length = 7;
		}

		asprintf (&buf, "unknown mech-code %lu for mech %.*s",
			  (unsigned long)status_value,
			  (int)oid.length, (char *)oid.value);
		if (maj_junk == GSS_S_COMPLETE)
			gss_release_buffer(&min_junk, &oid);

		if (buf == NULL)
		    break;

		status_string->length = strlen(buf);
		status_string->value  = buf;

		return (GSS_S_COMPLETE);
	}
	}
	_gss_buffer_zero(status_string);
	return (GSS_S_BAD_STATUS);
}

void
_gss_mg_collect_error(gss_OID mech, OM_uint32 maj, OM_uint32 min)
{
	struct _gss_mech_switch *m;

	m = _gss_find_mech_switch(mech);
	if (m != NULL)
		_gss_mg_error(m, maj, min);
}