GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/ocsp/ocsp_cl.c Lines: 62 143 43.4 %
Date: 2017-11-13 Branches: 27 100 27.0 %

Line Branch Exec Source
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/* $OpenBSD: ocsp_cl.c,v 1.14 2017/01/29 17:49:23 beck Exp $ */
2
/* Written by Tom Titchener <Tom_Titchener@groove.net> for the OpenSSL
3
 * project. */
4
5
/* History:
6
   This file was transfered to Richard Levitte from CertCo by Kathy
7
   Weinhold in mid-spring 2000 to be included in OpenSSL or released
8
   as a patch kit. */
9
10
/* ====================================================================
11
 * Copyright (c) 1998-2000 The OpenSSL Project.  All rights reserved.
12
 *
13
 * Redistribution and use in source and binary forms, with or without
14
 * modification, are permitted provided that the following conditions
15
 * are met:
16
 *
17
 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 *
20
 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 *    the documentation and/or other materials provided with the
23
 *    distribution.
24
 *
25
 * 3. All advertising materials mentioning features or use of this
26
 *    software must display the following acknowledgment:
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 *    "This product includes software developed by the OpenSSL Project
28
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
29
 *
30
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
31
 *    endorse or promote products derived from this software without
32
 *    prior written permission. For written permission, please contact
33
 *    openssl-core@openssl.org.
34
 *
35
 * 5. Products derived from this software may not be called "OpenSSL"
36
 *    nor may "OpenSSL" appear in their names without prior written
37
 *    permission of the OpenSSL Project.
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 *
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 * 6. Redistributions of any form whatsoever must retain the following
40
 *    acknowledgment:
41
 *    "This product includes software developed by the OpenSSL Project
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 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 *
44
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
54
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
55
 * OF THE POSSIBILITY OF SUCH DAMAGE.
56
 * ====================================================================
57
 *
58
 * This product includes cryptographic software written by Eric Young
59
 * (eay@cryptsoft.com).  This product includes software written by Tim
60
 * Hudson (tjh@cryptsoft.com).
61
 *
62
 */
63
64
#include <stdio.h>
65
#include <time.h>
66
67
#include <openssl/err.h>
68
#include <openssl/ocsp.h>
69
#include <openssl/objects.h>
70
#include <openssl/pem.h>
71
#include <openssl/x509.h>
72
#include <openssl/x509v3.h>
73
74
/* Utility functions related to sending OCSP requests and extracting
75
 * relevant information from the response.
76
 */
77
78
/* Add an OCSP_CERTID to an OCSP request. Return new OCSP_ONEREQ
79
 * pointer: useful if we want to add extensions.
80
 */
81
OCSP_ONEREQ *
82
OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid)
83
{
84
	OCSP_ONEREQ *one = NULL;
85
86
16
	if (!(one = OCSP_ONEREQ_new()))
87
		goto err;
88
8
	if (one->reqCert)
89
8
		OCSP_CERTID_free(one->reqCert);
90
8
	one->reqCert = cid;
91

16
	if (req && !sk_OCSP_ONEREQ_push(req->tbsRequest->requestList, one))
92
		goto err;
93
8
	return one;
94
95
err:
96
	OCSP_ONEREQ_free(one);
97
	return NULL;
98
8
}
99
100
/* Set requestorName from an X509_NAME structure */
101
int
102
OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm)
103
{
104
	GENERAL_NAME *gen;
105
106
	gen = GENERAL_NAME_new();
107
	if (gen == NULL)
108
		return 0;
109
	if (!X509_NAME_set(&gen->d.directoryName, nm)) {
110
		GENERAL_NAME_free(gen);
111
		return 0;
112
	}
113
	gen->type = GEN_DIRNAME;
114
	if (req->tbsRequest->requestorName)
115
		GENERAL_NAME_free(req->tbsRequest->requestorName);
116
	req->tbsRequest->requestorName = gen;
117
	return 1;
118
}
119
120
/* Add a certificate to an OCSP request */
121
int
122
OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert)
123
{
124
	OCSP_SIGNATURE *sig;
125
126
	if (!req->optionalSignature)
127
		req->optionalSignature = OCSP_SIGNATURE_new();
128
	sig = req->optionalSignature;
129
	if (!sig)
130
		return 0;
131
	if (!cert)
132
		return 1;
133
	if (!sig->certs && !(sig->certs = sk_X509_new_null()))
134
		return 0;
135
136
	if (!sk_X509_push(sig->certs, cert))
137
		return 0;
138
	CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
139
	return 1;
140
}
141
142
/* Sign an OCSP request set the requestorName to the subjec
143
 * name of an optional signers certificate and include one
144
 * or more optional certificates in the request. Behaves
145
 * like PKCS7_sign().
146
 */
147
int
148
OCSP_request_sign(OCSP_REQUEST *req, X509 *signer, EVP_PKEY *key,
149
    const EVP_MD *dgst, STACK_OF(X509) *certs, unsigned long flags)
150
{
151
	int i;
152
	OCSP_SIGNATURE *sig;
153
	X509 *x;
154
155
	if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))
156
		goto err;
157
158
	if (!(req->optionalSignature = sig = OCSP_SIGNATURE_new()))
159
		goto err;
160
	if (key) {
161
		if (!X509_check_private_key(signer, key)) {
162
			OCSPerror(OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
163
			goto err;
164
		}
165
		if (!OCSP_REQUEST_sign(req, key, dgst))
166
			goto err;
167
	}
168
169
	if (!(flags & OCSP_NOCERTS)) {
170
		if (!OCSP_request_add1_cert(req, signer))
171
			goto err;
172
		for (i = 0; i < sk_X509_num(certs); i++) {
173
			x = sk_X509_value(certs, i);
174
			if (!OCSP_request_add1_cert(req, x))
175
				goto err;
176
		}
177
	}
178
179
	return 1;
180
181
err:
182
	OCSP_SIGNATURE_free(req->optionalSignature);
183
	req->optionalSignature = NULL;
184
	return 0;
185
}
186
187
/* Get response status */
188
int
189
OCSP_response_status(OCSP_RESPONSE *resp)
190
{
191
12
	return ASN1_ENUMERATED_get(resp->responseStatus);
192
}
193
194
/* Extract basic response from OCSP_RESPONSE or NULL if
195
 * no basic response present.
196
 */
197
OCSP_BASICRESP *
198
OCSP_response_get1_basic(OCSP_RESPONSE *resp)
199
{
200
	OCSP_RESPBYTES *rb;
201
202
16
	rb = resp->responseBytes;
203
8
	if (!rb) {
204
		OCSPerror(OCSP_R_NO_RESPONSE_DATA);
205
		return NULL;
206
	}
207
8
	if (OBJ_obj2nid(rb->responseType) != NID_id_pkix_OCSP_basic) {
208
		OCSPerror(OCSP_R_NOT_BASIC_RESPONSE);
209
		return NULL;
210
	}
211
212
8
	return ASN1_item_unpack(rb->response, &OCSP_BASICRESP_it);
213
8
}
214
215
/* Return number of OCSP_SINGLERESP reponses present in
216
 * a basic response.
217
 */
218
int
219
OCSP_resp_count(OCSP_BASICRESP *bs)
220
{
221
	if (!bs)
222
		return -1;
223
	return sk_OCSP_SINGLERESP_num(bs->tbsResponseData->responses);
224
}
225
226
/* Extract an OCSP_SINGLERESP response with a given index */
227
OCSP_SINGLERESP *
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OCSP_resp_get0(OCSP_BASICRESP *bs, int idx)
229
{
230
8
	if (!bs)
231
		return NULL;
232
4
	return sk_OCSP_SINGLERESP_value(bs->tbsResponseData->responses, idx);
233
4
}
234
235
/* Look single response matching a given certificate ID */
236
int
237
OCSP_resp_find(OCSP_BASICRESP *bs, OCSP_CERTID *id, int last)
238
{
239
	int i;
240
	STACK_OF(OCSP_SINGLERESP) *sresp;
241
	OCSP_SINGLERESP *single;
242
243
8
	if (!bs)
244
		return -1;
245
4
	if (last < 0)
246
4
		last = 0;
247
	else
248
		last++;
249
4
	sresp = bs->tbsResponseData->responses;
250
12
	for (i = last; i < sk_OCSP_SINGLERESP_num(sresp); i++) {
251
6
		single = sk_OCSP_SINGLERESP_value(sresp, i);
252
6
		if (!OCSP_id_cmp(id, single->certId))
253
4
			return i;
254
	}
255
	return -1;
256
4
}
257
258
/* Extract status information from an OCSP_SINGLERESP structure.
259
 * Note: the revtime and reason values are only set if the
260
 * certificate status is revoked. Returns numerical value of
261
 * status.
262
 */
263
int
264
OCSP_single_get0_status(OCSP_SINGLERESP *single, int *reason,
265
    ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
266
    ASN1_GENERALIZEDTIME **nextupd)
267
{
268
	int ret;
269
	OCSP_CERTSTATUS *cst;
270
271
8
	if (!single)
272
		return -1;
273
4
	cst = single->certStatus;
274
4
	ret = cst->type;
275
4
	if (ret == V_OCSP_CERTSTATUS_REVOKED) {
276
2
		OCSP_REVOKEDINFO *rev = cst->value.revoked;
277
278
2
		if (revtime)
279
2
			*revtime = rev->revocationTime;
280
2
		if (reason) {
281
2
			if (rev->revocationReason)
282
				*reason = ASN1_ENUMERATED_get(
283
				    rev->revocationReason);
284
			else
285
2
				*reason = -1;
286
		}
287
2
	}
288
4
	if (thisupd)
289
4
		*thisupd = single->thisUpdate;
290
4
	if (nextupd)
291
4
		*nextupd = single->nextUpdate;
292
4
	return ret;
293
4
}
294
295
/* This function combines the previous ones: look up a certificate ID and
296
 * if found extract status information. Return 0 is successful.
297
 */
298
int
299
OCSP_resp_find_status(OCSP_BASICRESP *bs, OCSP_CERTID *id, int *status,
300
    int *reason, ASN1_GENERALIZEDTIME **revtime, ASN1_GENERALIZEDTIME **thisupd,
301
    ASN1_GENERALIZEDTIME **nextupd)
302
{
303
	int i;
304
	OCSP_SINGLERESP *single;
305
306
8
	i = OCSP_resp_find(bs, id, -1);
307
	/* Maybe check for multiple responses and give an error? */
308
4
	if (i < 0)
309
		return 0;
310
4
	single = OCSP_resp_get0(bs, i);
311
4
	i = OCSP_single_get0_status(single, reason, revtime, thisupd, nextupd);
312
4
	if (status)
313
4
		*status = i;
314
4
	return 1;
315
4
}
316
317
/* Check validity of thisUpdate and nextUpdate fields. It is possible that the request will
318
 * take a few seconds to process and/or the time wont be totally accurate. Therefore to avoid
319
 * rejecting otherwise valid time we allow the times to be within 'nsec' of the current time.
320
 * Also to avoid accepting very old responses without a nextUpdate field an optional maxage
321
 * parameter specifies the maximum age the thisUpdate field can be.
322
 */
323
int
324
OCSP_check_validity(ASN1_GENERALIZEDTIME *thisupd,
325
    ASN1_GENERALIZEDTIME *nextupd, long nsec, long maxsec)
326
{
327
8
	time_t t_now, t_tmp;
328
4
	struct tm tm_this, tm_next, tm_tmp;
329
330
4
	time(&t_now);
331
332
	/*
333
	 * Times must explicitly be a GENERALIZEDTIME as per section
334
	 * 4.2.2.1 of RFC 6960 - It is invalid to accept other times
335
	 * (such as UTCTIME permitted/required by RFC 5280 for certificates)
336
	 */
337
338
	/* Check thisUpdate is valid and not more than nsec in the future */
339
8
	if (ASN1_time_parse(thisupd->data, thisupd->length, &tm_this,
340
4
	    V_ASN1_GENERALIZEDTIME) != V_ASN1_GENERALIZEDTIME) {
341
		OCSPerror(OCSP_R_ERROR_IN_THISUPDATE_FIELD);
342
		return 0;
343
	} else {
344
4
		t_tmp = t_now + nsec;
345
4
		if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
346
			return 0;
347
4
		if (ASN1_time_tm_cmp(&tm_this, &tm_tmp) > 0) {
348
			OCSPerror(OCSP_R_STATUS_NOT_YET_VALID);
349
			return 0;
350
		}
351
352
		/*
353
		 * If maxsec specified check thisUpdate is not more than maxsec
354
		 * in the past
355
		 */
356
4
		if (maxsec >= 0) {
357
			t_tmp = t_now - maxsec;
358
			if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
359
				return 0;
360
			if (ASN1_time_tm_cmp(&tm_this, &tm_tmp) < 0) {
361
				OCSPerror(OCSP_R_STATUS_TOO_OLD);
362
				return 0;
363
			}
364
		}
365
	}
366
367
4
	if (!nextupd)
368
4
		return 1;
369
370
	/* Check nextUpdate is valid and not more than nsec in the past */
371
	if (ASN1_time_parse(nextupd->data, nextupd->length, &tm_next,
372
	    V_ASN1_GENERALIZEDTIME) != V_ASN1_GENERALIZEDTIME) {
373
		OCSPerror(OCSP_R_ERROR_IN_NEXTUPDATE_FIELD);
374
		return 0;
375
	} else {
376
		t_tmp = t_now - nsec;
377
		if (gmtime_r(&t_tmp, &tm_tmp) == NULL)
378
			return 0;
379
		if (ASN1_time_tm_cmp(&tm_next, &tm_tmp) < 0) {
380
			OCSPerror(OCSP_R_STATUS_EXPIRED);
381
			return 0;
382
		}
383
	}
384
385
	/* Also don't allow nextUpdate to precede thisUpdate */
386
	if (ASN1_time_tm_cmp(&tm_next, &tm_this) < 0) {
387
		OCSPerror(OCSP_R_NEXTUPDATE_BEFORE_THISUPDATE);
388
		return 0;
389
	}
390
391
	return 1;
392
4
}