1 /*
2 * Copyright 2007-2024 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright Nokia 2007-2019
4 * Copyright Siemens AG 2015-2019
5 *
6 * Licensed under the Apache License 2.0 (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
10 */
11
12 #include "cmp_local.h"
13 #include "internal/cryptlib.h"
14
15 /* explicit #includes not strictly needed since implied by the above: */
16 #include <openssl/bio.h>
17 #include <openssl/cmp.h>
18 #include <openssl/err.h>
19 #include <openssl/evp.h>
20 #include <openssl/x509v3.h>
21 #include <openssl/cmp_util.h>
22
23 #define IS_CREP(t) ((t) == OSSL_CMP_PKIBODY_IP || (t) == OSSL_CMP_PKIBODY_CP \
24 || (t) == OSSL_CMP_PKIBODY_KUP)
25
26 /*-
27 * Evaluate whether there's an exception (violating the standard) configured for
28 * handling negative responses without protection or with invalid protection.
29 * Returns 1 on acceptance, 0 on rejection, or -1 on (internal) error.
30 */
unprotected_exception(const OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * rep,int invalid_protection,ossl_unused int expected_type)31 static int unprotected_exception(const OSSL_CMP_CTX *ctx,
32 const OSSL_CMP_MSG *rep,
33 int invalid_protection,
34 ossl_unused int expected_type)
35 {
36 int rcvd_type = OSSL_CMP_MSG_get_bodytype(rep /* may be NULL */);
37 const char *msg_type = NULL;
38
39 if (!ossl_assert(ctx != NULL && rep != NULL))
40 return -1;
41
42 if (!ctx->unprotectedErrors)
43 return 0;
44
45 switch (rcvd_type) {
46 case OSSL_CMP_PKIBODY_ERROR:
47 msg_type = "error response";
48 break;
49 case OSSL_CMP_PKIBODY_RP:
50 {
51 OSSL_CMP_PKISI *si =
52 ossl_cmp_revrepcontent_get_pkisi(rep->body->value.rp,
53 OSSL_CMP_REVREQSID);
54
55 if (si == NULL)
56 return -1;
57 if (ossl_cmp_pkisi_get_status(si) == OSSL_CMP_PKISTATUS_rejection)
58 msg_type = "revocation response message with rejection status";
59 break;
60 }
61 case OSSL_CMP_PKIBODY_PKICONF:
62 msg_type = "PKI Confirmation message";
63 break;
64 default:
65 if (IS_CREP(rcvd_type)) {
66 int any_rid = OSSL_CMP_CERTREQID_NONE;
67 OSSL_CMP_CERTREPMESSAGE *crepmsg = rep->body->value.ip;
68 OSSL_CMP_CERTRESPONSE *crep =
69 ossl_cmp_certrepmessage_get0_certresponse(crepmsg, any_rid);
70
71 if (sk_OSSL_CMP_CERTRESPONSE_num(crepmsg->response) > 1)
72 return -1;
73 if (crep == NULL)
74 return -1;
75 if (ossl_cmp_pkisi_get_status(crep->status)
76 == OSSL_CMP_PKISTATUS_rejection)
77 msg_type = "CertRepMessage with rejection status";
78 }
79 }
80 if (msg_type == NULL)
81 return 0;
82 ossl_cmp_log2(WARN, ctx, "ignoring %s protection of %s",
83 invalid_protection ? "invalid" : "missing", msg_type);
84 return 1;
85 }
86
87 /* Save error info from PKIStatusInfo field of a certresponse into ctx */
save_statusInfo(OSSL_CMP_CTX * ctx,OSSL_CMP_PKISI * si)88 static int save_statusInfo(OSSL_CMP_CTX *ctx, OSSL_CMP_PKISI *si)
89 {
90 int i;
91 OSSL_CMP_PKIFREETEXT *ss;
92
93 if (!ossl_assert(ctx != NULL && si != NULL))
94 return 0;
95
96 ctx->status = ossl_cmp_pkisi_get_status(si);
97 if (ctx->status < OSSL_CMP_PKISTATUS_accepted)
98 return 0;
99
100 ctx->failInfoCode = ossl_cmp_pkisi_get_pkifailureinfo(si);
101
102 if (!ossl_cmp_ctx_set0_statusString(ctx, sk_ASN1_UTF8STRING_new_null())
103 || (ctx->statusString == NULL))
104 return 0;
105
106 ss = si->statusString; /* may be NULL */
107 for (i = 0; i < sk_ASN1_UTF8STRING_num(ss); i++) {
108 ASN1_UTF8STRING *str = sk_ASN1_UTF8STRING_value(ss, i);
109 ASN1_UTF8STRING *dup = ASN1_STRING_dup(str);
110
111 if (dup == NULL || !sk_ASN1_UTF8STRING_push(ctx->statusString, dup)) {
112 ASN1_UTF8STRING_free(dup);
113 return 0;
114 }
115 }
116 return 1;
117 }
118
is_crep_with_waiting(const OSSL_CMP_MSG * resp,int rid)119 static int is_crep_with_waiting(const OSSL_CMP_MSG *resp, int rid)
120 {
121 OSSL_CMP_CERTREPMESSAGE *crepmsg;
122 OSSL_CMP_CERTRESPONSE *crep;
123 int bt = OSSL_CMP_MSG_get_bodytype(resp);
124
125 if (!IS_CREP(bt))
126 return 0;
127
128 crepmsg = resp->body->value.ip; /* same for cp and kup */
129 crep = ossl_cmp_certrepmessage_get0_certresponse(crepmsg, rid);
130
131 return (crep != NULL
132 && ossl_cmp_pkisi_get_status(crep->status)
133 == OSSL_CMP_PKISTATUS_waiting);
134 }
135
136 /*-
137 * Perform the generic aspects of sending a request and receiving a response.
138 * Returns 1 on success and provides the received PKIMESSAGE in *rep.
139 * Returns 0 on error.
140 * Regardless of success, caller is responsible for freeing *rep (unless NULL).
141 */
send_receive_check(OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * req,OSSL_CMP_MSG ** rep,int expected_type)142 static int send_receive_check(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *req,
143 OSSL_CMP_MSG **rep, int expected_type)
144 {
145 int begin_transaction =
146 expected_type != OSSL_CMP_PKIBODY_POLLREP
147 && expected_type != OSSL_CMP_PKIBODY_PKICONF;
148 const char *req_type_str =
149 ossl_cmp_bodytype_to_string(OSSL_CMP_MSG_get_bodytype(req));
150 const char *expected_type_str = ossl_cmp_bodytype_to_string(expected_type);
151 int bak_msg_timeout = ctx->msg_timeout;
152 int bt;
153 time_t now = time(NULL);
154 int time_left;
155 OSSL_CMP_transfer_cb_t transfer_cb = ctx->transfer_cb;
156
157 #ifndef OPENSSL_NO_HTTP
158 if (transfer_cb == NULL)
159 transfer_cb = OSSL_CMP_MSG_http_perform;
160 #endif
161 *rep = NULL;
162
163 if (ctx->total_timeout != 0 /* not waiting indefinitely */) {
164 if (begin_transaction)
165 ctx->end_time = now + ctx->total_timeout;
166 if (now >= ctx->end_time) {
167 ERR_raise(ERR_LIB_CMP, CMP_R_TOTAL_TIMEOUT);
168 return 0;
169 }
170 if (!ossl_assert(ctx->end_time - now < INT_MAX)) {
171 /* actually cannot happen due to assignment in initial_certreq() */
172 ERR_raise(ERR_LIB_CMP, CMP_R_INVALID_ARGS);
173 return 0;
174 }
175 time_left = (int)(ctx->end_time - now);
176 if (ctx->msg_timeout == 0 || time_left < ctx->msg_timeout)
177 ctx->msg_timeout = time_left;
178 }
179
180 /* should print error queue since transfer_cb may call ERR_clear_error() */
181 OSSL_CMP_CTX_print_errors(ctx);
182
183 if (ctx->server != NULL)
184 ossl_cmp_log1(INFO, ctx, "sending %s", req_type_str);
185
186 *rep = (*transfer_cb)(ctx, req);
187 ctx->msg_timeout = bak_msg_timeout;
188
189 if (*rep == NULL) {
190 ERR_raise_data(ERR_LIB_CMP,
191 ctx->total_timeout != 0 && time(NULL) >= ctx->end_time ?
192 CMP_R_TOTAL_TIMEOUT : CMP_R_TRANSFER_ERROR,
193 "request sent: %s, expected response: %s",
194 req_type_str, expected_type_str);
195 return 0;
196 }
197
198 bt = OSSL_CMP_MSG_get_bodytype(*rep);
199 /*
200 * The body type in the 'bt' variable is not yet verified.
201 * Still we use this preliminary value already for a progress report because
202 * the following msg verification may also produce log entries and may fail.
203 */
204 ossl_cmp_log2(INFO, ctx, "received %s%s", ossl_cmp_bodytype_to_string(bt),
205 ossl_cmp_is_error_with_waiting(*rep) ? " (waiting)" : "");
206
207 /* copy received extraCerts to ctx->extraCertsIn so they can be retrieved */
208 if (bt != OSSL_CMP_PKIBODY_POLLREP && bt != OSSL_CMP_PKIBODY_PKICONF
209 && !ossl_cmp_ctx_set1_extraCertsIn(ctx, (*rep)->extraCerts))
210 return 0;
211
212 if (!ossl_cmp_msg_check_update(ctx, *rep, unprotected_exception,
213 expected_type))
214 return 0;
215
216 /*
217 * rep can have the expected response type, which during polling is pollRep.
218 * When polling, also any other non-error response (the final response)
219 * is fine here. When not yet polling, delayed delivery may be initiated
220 * by the server returning an error message with 'waiting' status (or a
221 * response message of expected type ip/cp/kup with 'waiting' status).
222 */
223 if (bt == expected_type
224 || (expected_type == OSSL_CMP_PKIBODY_POLLREP
225 ? bt != OSSL_CMP_PKIBODY_ERROR
226 : ossl_cmp_is_error_with_waiting(*rep)))
227 return 1;
228
229 /* received message type is not one of the expected ones (e.g., error) */
230 ERR_raise(ERR_LIB_CMP, bt == OSSL_CMP_PKIBODY_ERROR ? CMP_R_RECEIVED_ERROR :
231 CMP_R_UNEXPECTED_PKIBODY); /* in next line for mkerr.pl */
232
233 if (bt != OSSL_CMP_PKIBODY_ERROR) {
234 ERR_add_error_data(3, "message type is '",
235 ossl_cmp_bodytype_to_string(bt), "'");
236 } else {
237 OSSL_CMP_ERRORMSGCONTENT *emc = (*rep)->body->value.error;
238 OSSL_CMP_PKISI *si = emc->pKIStatusInfo;
239 char buf[OSSL_CMP_PKISI_BUFLEN];
240
241 if (save_statusInfo(ctx, si)
242 && OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf,
243 sizeof(buf)) != NULL)
244 ERR_add_error_data(1, buf);
245 if (emc->errorCode != NULL
246 && BIO_snprintf(buf, sizeof(buf), "; errorCode: %08lX",
247 ASN1_INTEGER_get(emc->errorCode)) > 0)
248 ERR_add_error_data(1, buf);
249 if (emc->errorDetails != NULL) {
250 char *text = ossl_sk_ASN1_UTF8STRING2text(emc->errorDetails, ", ",
251 OSSL_CMP_PKISI_BUFLEN - 1);
252
253 if (text != NULL && *text != '\0')
254 ERR_add_error_data(2, "; errorDetails: ", text);
255 OPENSSL_free(text);
256 }
257 if (ctx->status != OSSL_CMP_PKISTATUS_rejection) {
258 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKISTATUS);
259 if (ctx->status == OSSL_CMP_PKISTATUS_waiting)
260 ctx->status = OSSL_CMP_PKISTATUS_rejection;
261 }
262 }
263 return 0;
264 }
265
266 /*-
267 * When a 'waiting' PKIStatus has been received, this function is used to
268 * poll, which should yield a pollRep or the final response.
269 * On receiving a pollRep, which includes a checkAfter value, it return this
270 * value if sleep == 0, else it sleeps as long as indicated and retries.
271 *
272 * A transaction timeout is enabled if ctx->total_timeout is != 0.
273 * In this case polling will continue until the timeout is reached and then
274 * polling is done a last time even if this is before the "checkAfter" time.
275 *
276 * Returns -1 on receiving pollRep if sleep == 0, setting the checkAfter value.
277 * Returns 1 on success and provides the received PKIMESSAGE in *rep.
278 * In this case the caller is responsible for freeing *rep.
279 * Returns 0 on error (which includes the cases that timeout has been reached
280 * or a response with 'waiting' status has been received).
281 */
poll_for_response(OSSL_CMP_CTX * ctx,int sleep,int rid,OSSL_CMP_MSG ** rep,int * checkAfter)282 static int poll_for_response(OSSL_CMP_CTX *ctx, int sleep, int rid,
283 OSSL_CMP_MSG **rep, int *checkAfter)
284 {
285 OSSL_CMP_MSG *preq = NULL;
286 OSSL_CMP_MSG *prep = NULL;
287
288 ossl_cmp_info(ctx,
289 "received 'waiting' PKIStatus, starting to poll for response");
290 *rep = NULL;
291 for (;;) {
292 if ((preq = ossl_cmp_pollReq_new(ctx, rid)) == NULL)
293 goto err;
294
295 if (!send_receive_check(ctx, preq, &prep, OSSL_CMP_PKIBODY_POLLREP))
296 goto err;
297
298 /* handle potential pollRep */
299 if (OSSL_CMP_MSG_get_bodytype(prep) == OSSL_CMP_PKIBODY_POLLREP) {
300 OSSL_CMP_POLLREPCONTENT *prc = prep->body->value.pollRep;
301 OSSL_CMP_POLLREP *pollRep = NULL;
302 int64_t check_after;
303 char str[OSSL_CMP_PKISI_BUFLEN];
304 int len;
305
306 if (sk_OSSL_CMP_POLLREP_num(prc) > 1) {
307 ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_RESPONSES_NOT_SUPPORTED);
308 goto err;
309 }
310 pollRep = ossl_cmp_pollrepcontent_get0_pollrep(prc, rid);
311 if (pollRep == NULL)
312 goto err;
313
314 if (!ASN1_INTEGER_get_int64(&check_after, pollRep->checkAfter)) {
315 ERR_raise(ERR_LIB_CMP, CMP_R_BAD_CHECKAFTER_IN_POLLREP);
316 goto err;
317 }
318 if (check_after < 0 || (uint64_t)check_after
319 > (sleep ? ULONG_MAX / 1000 : INT_MAX)) {
320 ERR_raise(ERR_LIB_CMP, CMP_R_CHECKAFTER_OUT_OF_RANGE);
321 if (BIO_snprintf(str, OSSL_CMP_PKISI_BUFLEN, "value = %jd",
322 check_after) >= 0)
323 ERR_add_error_data(1, str);
324 goto err;
325 }
326
327 if (pollRep->reason == NULL
328 || (len = BIO_snprintf(str, OSSL_CMP_PKISI_BUFLEN,
329 " with reason = '")) < 0) {
330 *str = '\0';
331 } else {
332 char *text = ossl_sk_ASN1_UTF8STRING2text(pollRep->reason, ", ",
333 sizeof(str) - len - 2);
334
335 if (text == NULL
336 || BIO_snprintf(str + len, sizeof(str) - len,
337 "%s'", text) < 0)
338 *str = '\0';
339 OPENSSL_free(text);
340 }
341 ossl_cmp_log2(INFO, ctx,
342 "received polling response%s; checkAfter = %ld seconds",
343 str, check_after);
344
345 if (ctx->total_timeout != 0) { /* timeout is not infinite */
346 const int exp = OSSL_CMP_EXPECTED_RESP_TIME;
347 int64_t time_left = (int64_t)(ctx->end_time - exp - time(NULL));
348
349 if (time_left <= 0) {
350 ERR_raise(ERR_LIB_CMP, CMP_R_TOTAL_TIMEOUT);
351 goto err;
352 }
353 if (time_left < check_after)
354 check_after = time_left;
355 /* poll one last time just when timeout was reached */
356 }
357
358 OSSL_CMP_MSG_free(preq);
359 preq = NULL;
360 OSSL_CMP_MSG_free(prep);
361 prep = NULL;
362 if (sleep) {
363 OSSL_sleep((unsigned long)(1000 * check_after));
364 } else {
365 if (checkAfter != NULL)
366 *checkAfter = (int)check_after;
367 return -1; /* exits the loop */
368 }
369 } else if (is_crep_with_waiting(prep, rid)
370 || ossl_cmp_is_error_with_waiting(prep)) {
371 /* received status must not be 'waiting' */
372 (void)ossl_cmp_exchange_error(ctx, OSSL_CMP_PKISTATUS_rejection,
373 OSSL_CMP_CTX_FAILINFO_badRequest,
374 "polling already started",
375 0 /* errorCode */, NULL);
376 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKISTATUS);
377 goto err;
378 } else {
379 ossl_cmp_info(ctx, "received final response after polling");
380 if (!ossl_cmp_ctx_set1_first_senderNonce(ctx, NULL))
381 return 0;
382 break;
383 }
384 }
385 if (prep == NULL)
386 goto err;
387
388 OSSL_CMP_MSG_free(preq);
389 *rep = prep;
390
391 return 1;
392 err:
393 (void)ossl_cmp_ctx_set1_first_senderNonce(ctx, NULL);
394 OSSL_CMP_MSG_free(preq);
395 OSSL_CMP_MSG_free(prep);
396 return 0;
397 }
398
save_senderNonce_if_waiting(OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * rep,int rid)399 static int save_senderNonce_if_waiting(OSSL_CMP_CTX *ctx,
400 const OSSL_CMP_MSG *rep, int rid)
401 {
402 /*
403 * Lightweight CMP Profile section 4.4 states: the senderNonce of the
404 * preceding request message because this value will be needed for checking
405 * the recipNonce of the final response to be received after polling.
406 */
407 if ((is_crep_with_waiting(rep, rid)
408 || ossl_cmp_is_error_with_waiting(rep))
409 && !ossl_cmp_ctx_set1_first_senderNonce(ctx, ctx->senderNonce))
410 return 0;
411
412 return 1;
413 }
414
415 /*
416 * Send request and get response possibly with polling initiated by error msg.
417 * Polling for ip/cp/kup/ with 'waiting' status is handled by cert_response().
418 */
send_receive_also_delayed(OSSL_CMP_CTX * ctx,const OSSL_CMP_MSG * req,OSSL_CMP_MSG ** rep,int expected_type)419 static int send_receive_also_delayed(OSSL_CMP_CTX *ctx, const OSSL_CMP_MSG *req,
420 OSSL_CMP_MSG **rep, int expected_type)
421 {
422
423 if (!send_receive_check(ctx, req, rep, expected_type))
424 return 0;
425
426 if (ossl_cmp_is_error_with_waiting(*rep)) {
427 if (!save_senderNonce_if_waiting(ctx, *rep, OSSL_CMP_CERTREQID_NONE))
428 return 0;
429 /* not modifying ctx->status during certConf and error exchanges */
430 if (expected_type != OSSL_CMP_PKIBODY_PKICONF
431 && !save_statusInfo(ctx, (*rep)->body->value.error->pKIStatusInfo))
432 return 0;
433
434 OSSL_CMP_MSG_free(*rep);
435 *rep = NULL;
436
437 if (poll_for_response(ctx, 1 /* can sleep */, OSSL_CMP_CERTREQID_NONE,
438 rep, NULL /* checkAfter */) <= 0) {
439 ERR_raise(ERR_LIB_CMP, CMP_R_POLLING_FAILED);
440 return 0;
441 }
442 }
443 if (OSSL_CMP_MSG_get_bodytype(*rep) != expected_type) {
444 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY);
445 return 0;
446 }
447
448 return 1;
449 }
450 /*
451 * Send certConf for IR, CR or KUR sequences and check response,
452 * not modifying ctx->status during the certConf exchange
453 */
ossl_cmp_exchange_certConf(OSSL_CMP_CTX * ctx,int certReqId,int fail_info,const char * txt)454 int ossl_cmp_exchange_certConf(OSSL_CMP_CTX *ctx, int certReqId,
455 int fail_info, const char *txt)
456 {
457 OSSL_CMP_MSG *certConf;
458 OSSL_CMP_MSG *PKIconf = NULL;
459 int res = 0;
460
461 /* OSSL_CMP_certConf_new() also checks if all necessary options are set */
462 certConf = ossl_cmp_certConf_new(ctx, certReqId, fail_info, txt);
463 if (certConf == NULL)
464 goto err;
465
466 res = send_receive_also_delayed(ctx, certConf, &PKIconf,
467 OSSL_CMP_PKIBODY_PKICONF);
468
469 err:
470 OSSL_CMP_MSG_free(certConf);
471 OSSL_CMP_MSG_free(PKIconf);
472 return res;
473 }
474
475 /* Send given error and check response */
ossl_cmp_exchange_error(OSSL_CMP_CTX * ctx,int status,int fail_info,const char * txt,int errorCode,const char * details)476 int ossl_cmp_exchange_error(OSSL_CMP_CTX *ctx, int status, int fail_info,
477 const char *txt, int errorCode, const char *details)
478 {
479 OSSL_CMP_MSG *error = NULL;
480 OSSL_CMP_PKISI *si = NULL;
481 OSSL_CMP_MSG *PKIconf = NULL;
482 int res = 0;
483
484 /* not overwriting ctx->status on error exchange */
485 if ((si = OSSL_CMP_STATUSINFO_new(status, fail_info, txt)) == NULL)
486 goto err;
487 /* ossl_cmp_error_new() also checks if all necessary options are set */
488 if ((error = ossl_cmp_error_new(ctx, si, errorCode, details, 0)) == NULL)
489 goto err;
490
491 res = send_receive_also_delayed(ctx, error,
492 &PKIconf, OSSL_CMP_PKIBODY_PKICONF);
493
494 err:
495 OSSL_CMP_MSG_free(error);
496 OSSL_CMP_PKISI_free(si);
497 OSSL_CMP_MSG_free(PKIconf);
498 return res;
499 }
500
501 /*-
502 * Retrieve a copy of the certificate, if any, from the given CertResponse.
503 * Take into account PKIStatusInfo of CertResponse in ctx, report it on error.
504 * Returns NULL if not found or on error.
505 */
get1_cert_status(OSSL_CMP_CTX * ctx,int bodytype,OSSL_CMP_CERTRESPONSE * crep)506 static X509 *get1_cert_status(OSSL_CMP_CTX *ctx, int bodytype,
507 OSSL_CMP_CERTRESPONSE *crep)
508 {
509 char buf[OSSL_CMP_PKISI_BUFLEN];
510 X509 *crt = NULL;
511
512 if (!ossl_assert(ctx != NULL && crep != NULL))
513 return NULL;
514
515 switch (ossl_cmp_pkisi_get_status(crep->status)) {
516 case OSSL_CMP_PKISTATUS_waiting:
517 ossl_cmp_err(ctx,
518 "received \"waiting\" status for cert when actually aiming to extract cert");
519 ERR_raise(ERR_LIB_CMP, CMP_R_ENCOUNTERED_WAITING);
520 goto err;
521 case OSSL_CMP_PKISTATUS_grantedWithMods:
522 ossl_cmp_warn(ctx, "received \"grantedWithMods\" for certificate");
523 break;
524 case OSSL_CMP_PKISTATUS_accepted:
525 break;
526 /* get all information in case of a rejection before going to error */
527 case OSSL_CMP_PKISTATUS_rejection:
528 ossl_cmp_err(ctx, "received \"rejection\" status rather than cert");
529 ERR_raise(ERR_LIB_CMP, CMP_R_REQUEST_REJECTED_BY_SERVER);
530 goto err;
531 case OSSL_CMP_PKISTATUS_revocationWarning:
532 ossl_cmp_warn(ctx,
533 "received \"revocationWarning\" - a revocation of the cert is imminent");
534 break;
535 case OSSL_CMP_PKISTATUS_revocationNotification:
536 ossl_cmp_warn(ctx,
537 "received \"revocationNotification\" - a revocation of the cert has occurred");
538 break;
539 case OSSL_CMP_PKISTATUS_keyUpdateWarning:
540 if (bodytype != OSSL_CMP_PKIBODY_KUR) {
541 ERR_raise(ERR_LIB_CMP, CMP_R_ENCOUNTERED_KEYUPDATEWARNING);
542 goto err;
543 }
544 break;
545 default:
546 ossl_cmp_log1(ERROR, ctx,
547 "received unsupported PKIStatus %d for certificate",
548 ctx->status);
549 ERR_raise(ERR_LIB_CMP, CMP_R_UNKNOWN_PKISTATUS);
550 goto err;
551 }
552 crt = ossl_cmp_certresponse_get1_cert(ctx, crep);
553 if (crt == NULL) /* according to PKIStatus, we can expect a cert */
554 ERR_raise(ERR_LIB_CMP, CMP_R_CERTIFICATE_NOT_FOUND);
555
556 return crt;
557
558 err:
559 if (OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf, sizeof(buf)) != NULL)
560 ERR_add_error_data(1, buf);
561 return NULL;
562 }
563
564 /*-
565 * Callback fn validating that the new certificate can be verified, using
566 * ctx->certConf_cb_arg, which has been initialized using opt_out_trusted, and
567 * ctx->untrusted, which at this point already contains msg->extraCerts.
568 * Returns 0 on acceptance, else a bit field reflecting PKIFailureInfo.
569 * Quoting from RFC 4210 section 5.1. Overall PKI Message:
570 * The extraCerts field can contain certificates that may be useful to
571 * the recipient. For example, this can be used by a CA or RA to
572 * present an end entity with certificates that it needs to verify its
573 * own new certificate (if, for example, the CA that issued the end
574 * entity's certificate is not a root CA for the end entity). Note that
575 * this field does not necessarily contain a certification path; the
576 * recipient may have to sort, select from, or otherwise process the
577 * extra certificates in order to use them.
578 * Note: While often handy, there is no hard requirement by CMP that
579 * an EE must be able to validate the certificates it gets enrolled.
580 */
OSSL_CMP_certConf_cb(OSSL_CMP_CTX * ctx,X509 * cert,int fail_info,const char ** text)581 int OSSL_CMP_certConf_cb(OSSL_CMP_CTX *ctx, X509 *cert, int fail_info,
582 const char **text)
583 {
584 X509_STORE *out_trusted = OSSL_CMP_CTX_get_certConf_cb_arg(ctx);
585 STACK_OF(X509) *chain = NULL;
586
587 (void)text; /* make (artificial) use of var to prevent compiler warning */
588
589 if (fail_info != 0) /* accept any error flagged by CMP core library */
590 return fail_info;
591
592 if (out_trusted == NULL) {
593 ossl_cmp_debug(ctx, "trying to build chain for newly enrolled cert");
594 chain = X509_build_chain(cert, ctx->untrusted, out_trusted,
595 0, ctx->libctx, ctx->propq);
596 } else {
597 X509_STORE_CTX *csc = X509_STORE_CTX_new_ex(ctx->libctx, ctx->propq);
598
599 ossl_cmp_debug(ctx, "validating newly enrolled cert");
600 if (csc == NULL)
601 goto err;
602 if (!X509_STORE_CTX_init(csc, out_trusted, cert, ctx->untrusted))
603 goto err;
604 /* disable any cert status/revocation checking etc. */
605 X509_VERIFY_PARAM_clear_flags(X509_STORE_CTX_get0_param(csc),
606 ~(X509_V_FLAG_USE_CHECK_TIME
607 | X509_V_FLAG_NO_CHECK_TIME
608 | X509_V_FLAG_PARTIAL_CHAIN
609 | X509_V_FLAG_POLICY_CHECK));
610 if (X509_verify_cert(csc) <= 0)
611 goto err;
612
613 if (!ossl_x509_add_certs_new(&chain, X509_STORE_CTX_get0_chain(csc),
614 X509_ADD_FLAG_UP_REF | X509_ADD_FLAG_NO_DUP
615 | X509_ADD_FLAG_NO_SS)) {
616 sk_X509_free(chain);
617 chain = NULL;
618 }
619 err:
620 X509_STORE_CTX_free(csc);
621 }
622
623 if (sk_X509_num(chain) > 0)
624 X509_free(sk_X509_shift(chain)); /* remove leaf (EE) cert */
625 if (out_trusted != NULL) {
626 if (chain == NULL) {
627 ossl_cmp_err(ctx, "failed to validate newly enrolled cert");
628 fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_incorrectData;
629 } else {
630 ossl_cmp_debug(ctx,
631 "success validating newly enrolled cert");
632 }
633 } else if (chain == NULL) {
634 ossl_cmp_warn(ctx, "could not build approximate chain for newly enrolled cert, resorting to received extraCerts");
635 chain = OSSL_CMP_CTX_get1_extraCertsIn(ctx);
636 } else {
637 ossl_cmp_debug(ctx,
638 "success building approximate chain for newly enrolled cert");
639 }
640 (void)ossl_cmp_ctx_set1_newChain(ctx, chain);
641 OSSL_STACK_OF_X509_free(chain);
642
643 return fail_info;
644 }
645
646 /*-
647 * Perform the generic handling of certificate responses for IR/CR/KUR/P10CR.
648 * |rid| must be OSSL_CMP_CERTREQID_NONE if not available, namely for p10cr
649 * Returns -1 on receiving pollRep if sleep == 0, setting the checkAfter value.
650 * Returns 1 on success and provides the received PKIMESSAGE in *resp.
651 * Returns 0 on error (which includes the case that timeout has been reached).
652 * Regardless of success, caller is responsible for freeing *resp (unless NULL).
653 */
cert_response(OSSL_CMP_CTX * ctx,int sleep,int rid,OSSL_CMP_MSG ** resp,int * checkAfter,ossl_unused int req_type,ossl_unused int expected_type)654 static int cert_response(OSSL_CMP_CTX *ctx, int sleep, int rid,
655 OSSL_CMP_MSG **resp, int *checkAfter,
656 ossl_unused int req_type,
657 ossl_unused int expected_type)
658 {
659 EVP_PKEY *rkey = ossl_cmp_ctx_get0_newPubkey(ctx);
660 int fail_info = 0; /* no failure */
661 const char *txt = NULL;
662 OSSL_CMP_CERTREPMESSAGE *crepmsg = NULL;
663 OSSL_CMP_CERTRESPONSE *crep = NULL;
664 OSSL_CMP_certConf_cb_t cb;
665 X509 *cert;
666 char *subj = NULL;
667 int ret = 1;
668 int rcvd_type;
669 OSSL_CMP_PKISI *si;
670
671 if (!ossl_assert(ctx != NULL))
672 return 0;
673
674 retry:
675 rcvd_type = OSSL_CMP_MSG_get_bodytype(*resp);
676 if (IS_CREP(rcvd_type)) {
677 crepmsg = (*resp)->body->value.ip; /* same for cp and kup */
678 if (sk_OSSL_CMP_CERTRESPONSE_num(crepmsg->response) > 1) {
679 ERR_raise(ERR_LIB_CMP, CMP_R_MULTIPLE_RESPONSES_NOT_SUPPORTED);
680 return 0;
681 }
682 crep = ossl_cmp_certrepmessage_get0_certresponse(crepmsg, rid);
683 if (crep == NULL)
684 return 0;
685 si = crep->status;
686
687 if (rid == OSSL_CMP_CERTREQID_NONE) {
688 /* for OSSL_CMP_PKIBODY_P10CR learn CertReqId from response */
689 rid = ossl_cmp_asn1_get_int(crep->certReqId);
690 if (rid < OSSL_CMP_CERTREQID_NONE) {
691 ERR_raise(ERR_LIB_CMP, CMP_R_BAD_REQUEST_ID);
692 return 0;
693 }
694 }
695 } else if (rcvd_type == OSSL_CMP_PKIBODY_ERROR) {
696 si = (*resp)->body->value.error->pKIStatusInfo;
697 } else {
698 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY);
699 return 0;
700 }
701
702 if (!save_statusInfo(ctx, si))
703 return 0;
704
705 if (ossl_cmp_pkisi_get_status(si) == OSSL_CMP_PKISTATUS_waiting) {
706 /*
707 * Here we allow both and error message with waiting indication
708 * as well as a certificate response with waiting indication, where
709 * its flavor (ip, cp, or kup) may not strictly match ir/cr/p10cr/kur.
710 */
711 OSSL_CMP_MSG_free(*resp);
712 *resp = NULL;
713 if ((ret = poll_for_response(ctx, sleep, rid, resp, checkAfter)) != 0) {
714 if (ret == -1) /* at this point implies sleep == 0 */
715 return ret; /* waiting */
716 goto retry; /* got some response other than pollRep */
717 } else {
718 ERR_raise(ERR_LIB_CMP, CMP_R_POLLING_FAILED);
719 return 0;
720 }
721 }
722
723 /* at this point, we have received ip/cp/kup/error without waiting */
724 if (rcvd_type == OSSL_CMP_PKIBODY_ERROR) {
725 ERR_raise(ERR_LIB_CMP, CMP_R_RECEIVED_ERROR);
726 return 0;
727 }
728 /* here we are strict on the flavor of ip/cp/kup: must match request */
729 if (rcvd_type != expected_type) {
730 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKIBODY);
731 return 0;
732 }
733
734 cert = get1_cert_status(ctx, (*resp)->body->type, crep);
735 if (cert == NULL) {
736 ERR_add_error_data(1, "; cannot extract certificate from response");
737 return 0;
738 }
739 if (!ossl_cmp_ctx_set0_newCert(ctx, cert))
740 return 0;
741
742 /*
743 * if the CMP server returned certificates in the caPubs field, copy them
744 * to the context so that they can be retrieved if necessary
745 */
746 if (crepmsg != NULL && crepmsg->caPubs != NULL
747 && !ossl_cmp_ctx_set1_caPubs(ctx, crepmsg->caPubs))
748 return 0;
749
750 subj = X509_NAME_oneline(X509_get_subject_name(cert), NULL, 0);
751 if (rkey != NULL
752 /* X509_check_private_key() also works if rkey is just public key */
753 && !(X509_check_private_key(ctx->newCert, rkey))) {
754 fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_incorrectData;
755 txt = "public key in new certificate does not match our enrollment key";
756 /*-
757 * not calling (void)ossl_cmp_exchange_error(ctx,
758 * OSSL_CMP_PKISTATUS_rejection, fail_info, txt)
759 * not throwing CMP_R_CERTIFICATE_NOT_ACCEPTED with txt
760 * not returning 0
761 * since we better leave this for the certConf_cb to decide
762 */
763 }
764
765 /*
766 * Execute the certification checking callback function,
767 * which can determine whether to accept a newly enrolled certificate.
768 * It may overrule the pre-decision reflected in 'fail_info' and '*txt'.
769 */
770 cb = ctx->certConf_cb != NULL ? ctx->certConf_cb : OSSL_CMP_certConf_cb;
771 if ((fail_info = cb(ctx, ctx->newCert, fail_info, &txt)) != 0
772 && txt == NULL)
773 txt = "CMP client did not accept it";
774 if (fail_info != 0) /* immediately log error before any certConf exchange */
775 ossl_cmp_log1(ERROR, ctx,
776 "rejecting newly enrolled cert with subject: %s", subj);
777 /*
778 * certConf exchange should better be moved to do_certreq_seq() such that
779 * also more low-level errors with CertReqMessages get reported to server
780 */
781 if (!ctx->disableConfirm
782 && !ossl_cmp_hdr_has_implicitConfirm((*resp)->header)) {
783 if (!ossl_cmp_exchange_certConf(ctx, rid, fail_info, txt))
784 ret = 0;
785 }
786
787 /* not throwing failure earlier as transfer_cb may call ERR_clear_error() */
788 if (fail_info != 0) {
789 ERR_raise_data(ERR_LIB_CMP, CMP_R_CERTIFICATE_NOT_ACCEPTED,
790 "rejecting newly enrolled cert with subject: %s; %s",
791 subj, txt);
792 ctx->status = OSSL_CMP_PKISTATUS_rejection;
793 ret = 0;
794 }
795 OPENSSL_free(subj);
796 return ret;
797 }
798
initial_certreq(OSSL_CMP_CTX * ctx,int req_type,const OSSL_CRMF_MSG * crm,OSSL_CMP_MSG ** p_rep,int rep_type)799 static int initial_certreq(OSSL_CMP_CTX *ctx,
800 int req_type, const OSSL_CRMF_MSG *crm,
801 OSSL_CMP_MSG **p_rep, int rep_type)
802 {
803 OSSL_CMP_MSG *req;
804 int res;
805
806 ctx->status = OSSL_CMP_PKISTATUS_request;
807 if (!ossl_cmp_ctx_set0_newCert(ctx, NULL))
808 return 0;
809
810 /* also checks if all necessary options are set */
811 if ((req = ossl_cmp_certreq_new(ctx, req_type, crm)) == NULL)
812 return 0;
813
814 ctx->status = OSSL_CMP_PKISTATUS_trans;
815 res = send_receive_check(ctx, req, p_rep, rep_type);
816 OSSL_CMP_MSG_free(req);
817 return res;
818 }
819
OSSL_CMP_try_certreq(OSSL_CMP_CTX * ctx,int req_type,const OSSL_CRMF_MSG * crm,int * checkAfter)820 int OSSL_CMP_try_certreq(OSSL_CMP_CTX *ctx, int req_type,
821 const OSSL_CRMF_MSG *crm, int *checkAfter)
822 {
823 OSSL_CMP_MSG *rep = NULL;
824 int is_p10 = req_type == OSSL_CMP_PKIBODY_P10CR;
825 int rid = is_p10 ? OSSL_CMP_CERTREQID_NONE : OSSL_CMP_CERTREQID;
826 int rep_type = is_p10 ? OSSL_CMP_PKIBODY_CP : req_type + 1;
827 int res = 0;
828
829 if (ctx == NULL) {
830 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
831 return 0;
832 }
833
834 if (ctx->status != OSSL_CMP_PKISTATUS_waiting) { /* not polling already */
835 if (!initial_certreq(ctx, req_type, crm, &rep, rep_type))
836 goto err;
837
838 if (!save_senderNonce_if_waiting(ctx, rep, rid))
839 return 0;
840 } else {
841 if (req_type < 0)
842 return ossl_cmp_exchange_error(ctx, OSSL_CMP_PKISTATUS_rejection,
843 0, "polling aborted",
844 0 /* errorCode */, "by application");
845 res = poll_for_response(ctx, 0 /* no sleep */, rid, &rep, checkAfter);
846 if (res <= 0) /* waiting or error */
847 return res;
848 }
849 res = cert_response(ctx, 0 /* no sleep */, rid, &rep, checkAfter,
850 req_type, rep_type);
851
852 err:
853 OSSL_CMP_MSG_free(rep);
854 return res;
855 }
856
857 /*-
858 * Do the full sequence CR/IR/KUR/P10CR, CP/IP/KUP/CP,
859 * certConf, PKIconf, and polling if required.
860 * Will sleep as long as indicated by the server (according to checkAfter).
861 * All enrollment options need to be present in the context.
862 * Returns pointer to received certificate, or NULL if none was received.
863 */
OSSL_CMP_exec_certreq(OSSL_CMP_CTX * ctx,int req_type,const OSSL_CRMF_MSG * crm)864 X509 *OSSL_CMP_exec_certreq(OSSL_CMP_CTX *ctx, int req_type,
865 const OSSL_CRMF_MSG *crm)
866 {
867 OSSL_CMP_MSG *rep = NULL;
868 int is_p10 = req_type == OSSL_CMP_PKIBODY_P10CR;
869 int rid = is_p10 ? OSSL_CMP_CERTREQID_NONE : OSSL_CMP_CERTREQID;
870 int rep_type = is_p10 ? OSSL_CMP_PKIBODY_CP : req_type + 1;
871 X509 *result = NULL;
872
873 if (ctx == NULL) {
874 ERR_raise(ERR_LIB_CMP, CMP_R_NULL_ARGUMENT);
875 return NULL;
876 }
877
878 if (!initial_certreq(ctx, req_type, crm, &rep, rep_type))
879 goto err;
880
881 if (!save_senderNonce_if_waiting(ctx, rep, rid))
882 return 0;
883
884 if (cert_response(ctx, 1 /* sleep */, rid, &rep, NULL, req_type, rep_type)
885 <= 0)
886 goto err;
887
888 result = ctx->newCert;
889 err:
890 OSSL_CMP_MSG_free(rep);
891 return result;
892 }
893
OSSL_CMP_exec_RR_ses(OSSL_CMP_CTX * ctx)894 int OSSL_CMP_exec_RR_ses(OSSL_CMP_CTX *ctx)
895 {
896 OSSL_CMP_MSG *rr = NULL;
897 OSSL_CMP_MSG *rp = NULL;
898 const int num_RevDetails = 1;
899 const int rsid = OSSL_CMP_REVREQSID;
900 OSSL_CMP_REVREPCONTENT *rrep = NULL;
901 OSSL_CMP_PKISI *si = NULL;
902 char buf[OSSL_CMP_PKISI_BUFLEN];
903 int ret = 0;
904
905 if (ctx == NULL) {
906 ERR_raise(ERR_LIB_CMP, CMP_R_INVALID_ARGS);
907 return 0;
908 }
909 ctx->status = OSSL_CMP_PKISTATUS_request;
910 if (ctx->oldCert == NULL && ctx->p10CSR == NULL
911 && (ctx->serialNumber == NULL || ctx->issuer == NULL)) {
912 ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_REFERENCE_CERT);
913 return 0;
914 }
915
916 /* OSSL_CMP_rr_new() also checks if all necessary options are set */
917 if ((rr = ossl_cmp_rr_new(ctx)) == NULL)
918 goto end;
919
920 ctx->status = OSSL_CMP_PKISTATUS_trans;
921 if (!send_receive_also_delayed(ctx, rr, &rp, OSSL_CMP_PKIBODY_RP))
922 goto end;
923
924 rrep = rp->body->value.rp;
925 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
926 if (sk_OSSL_CMP_PKISI_num(rrep->status) != num_RevDetails) {
927 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_RP_COMPONENT_COUNT);
928 goto end;
929 }
930 #else
931 if (sk_OSSL_CMP_PKISI_num(rrep->status) < 1) {
932 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_RP_COMPONENT_COUNT);
933 goto end;
934 }
935 #endif
936
937 /* evaluate PKIStatus field */
938 si = ossl_cmp_revrepcontent_get_pkisi(rrep, rsid);
939 if (!save_statusInfo(ctx, si))
940 goto err;
941 switch (ossl_cmp_pkisi_get_status(si)) {
942 case OSSL_CMP_PKISTATUS_accepted:
943 ossl_cmp_info(ctx, "revocation accepted (PKIStatus=accepted)");
944 ret = 1;
945 break;
946 case OSSL_CMP_PKISTATUS_grantedWithMods:
947 ossl_cmp_info(ctx, "revocation accepted (PKIStatus=grantedWithMods)");
948 ret = 1;
949 break;
950 case OSSL_CMP_PKISTATUS_rejection:
951 ERR_raise(ERR_LIB_CMP, CMP_R_REQUEST_REJECTED_BY_SERVER);
952 goto err;
953 case OSSL_CMP_PKISTATUS_revocationWarning:
954 ossl_cmp_info(ctx, "revocation accepted (PKIStatus=revocationWarning)");
955 ret = 1;
956 break;
957 case OSSL_CMP_PKISTATUS_revocationNotification:
958 /* interpretation as warning or error depends on CA */
959 ossl_cmp_warn(ctx,
960 "revocation accepted (PKIStatus=revocationNotification)");
961 ret = 1;
962 break;
963 case OSSL_CMP_PKISTATUS_waiting:
964 case OSSL_CMP_PKISTATUS_keyUpdateWarning:
965 ERR_raise(ERR_LIB_CMP, CMP_R_UNEXPECTED_PKISTATUS);
966 goto err;
967 default:
968 ERR_raise(ERR_LIB_CMP, CMP_R_UNKNOWN_PKISTATUS);
969 goto err;
970 }
971
972 /* check any present CertId in optional revCerts field */
973 if (sk_OSSL_CRMF_CERTID_num(rrep->revCerts) >= 1) {
974 OSSL_CRMF_CERTID *cid;
975 OSSL_CRMF_CERTTEMPLATE *tmpl =
976 sk_OSSL_CMP_REVDETAILS_value(rr->body->value.rr, rsid)->certDetails;
977 const X509_NAME *issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl);
978 const ASN1_INTEGER *serial =
979 OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(tmpl);
980
981 if (sk_OSSL_CRMF_CERTID_num(rrep->revCerts) != num_RevDetails) {
982 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_RP_COMPONENT_COUNT);
983 ret = 0;
984 goto err;
985 }
986 if ((cid = ossl_cmp_revrepcontent_get_CertId(rrep, rsid)) == NULL) {
987 ERR_raise(ERR_LIB_CMP, CMP_R_MISSING_CERTID);
988 ret = 0;
989 goto err;
990 }
991 if (X509_NAME_cmp(issuer, OSSL_CRMF_CERTID_get0_issuer(cid)) != 0) {
992 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
993 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_CERTID_IN_RP);
994 ret = 0;
995 goto err;
996 #endif
997 }
998 if (ASN1_INTEGER_cmp(serial,
999 OSSL_CRMF_CERTID_get0_serialNumber(cid)) != 0) {
1000 #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
1001 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_SERIAL_IN_RP);
1002 ret = 0;
1003 goto err;
1004 #endif
1005 }
1006 }
1007
1008 /* check number of any optionally present crls */
1009 if (rrep->crls != NULL && sk_X509_CRL_num(rrep->crls) != num_RevDetails) {
1010 ERR_raise(ERR_LIB_CMP, CMP_R_WRONG_RP_COMPONENT_COUNT);
1011 ret = 0;
1012 goto err;
1013 }
1014
1015 err:
1016 if (ret == 0
1017 && OSSL_CMP_CTX_snprint_PKIStatus(ctx, buf, sizeof(buf)) != NULL)
1018 ERR_add_error_data(1, buf);
1019
1020 end:
1021 OSSL_CMP_MSG_free(rr);
1022 OSSL_CMP_MSG_free(rp);
1023 return ret;
1024 }
1025
STACK_OF(OSSL_CMP_ITAV)1026 STACK_OF(OSSL_CMP_ITAV) *OSSL_CMP_exec_GENM_ses(OSSL_CMP_CTX *ctx)
1027 {
1028 OSSL_CMP_MSG *genm;
1029 OSSL_CMP_MSG *genp = NULL;
1030 STACK_OF(OSSL_CMP_ITAV) *itavs = NULL;
1031
1032 if (ctx == NULL) {
1033 ERR_raise(ERR_LIB_CMP, CMP_R_INVALID_ARGS);
1034 return NULL;
1035 }
1036 ctx->status = OSSL_CMP_PKISTATUS_request;
1037
1038 if ((genm = ossl_cmp_genm_new(ctx)) == NULL)
1039 goto err;
1040
1041 ctx->status = OSSL_CMP_PKISTATUS_trans;
1042 if (!send_receive_also_delayed(ctx, genm, &genp, OSSL_CMP_PKIBODY_GENP))
1043 goto err;
1044 ctx->status = OSSL_CMP_PKISTATUS_accepted;
1045
1046 itavs = genp->body->value.genp;
1047 if (itavs == NULL)
1048 itavs = sk_OSSL_CMP_ITAV_new_null();
1049 /* received stack of itavs not to be freed with the genp */
1050 genp->body->value.genp = NULL;
1051
1052 err:
1053 OSSL_CMP_MSG_free(genm);
1054 OSSL_CMP_MSG_free(genp);
1055
1056 return itavs; /* NULL indicates error case */
1057 }
1058
