2 * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
35 * @page page_revoke Revocation methods
37 * There are two revocation method for PKIX/X.509: CRL and OCSP.
38 * Revocation is needed if the private key is lost and
39 * stolen. Depending on how picky you are, you might want to make
40 * revocation for destroyed private keys too (smartcard broken), but
41 * that should not be a problem.
43 * CRL is a list of certifiates that have expired.
45 * OCSP is an online checking method where the requestor sends a list
46 * of certificates to the OCSP server to return a signed reply if they
47 * are valid or not. Some services sends a OCSP reply as part of the
48 * hand-shake to make the revoktion decision simpler/faster for the
53 RCSID("$Id: revoke.c 23413 2008-07-26 18:34:53Z lha $");
58 CRLCertificateList crl;
66 OCSPBasicOCSPResponse ocsp;
72 struct hx509_revoke_ctx_data {
75 struct revoke_crl *val;
79 struct revoke_ocsp *val;
85 * Allocate a revokation context. Free with hx509_revoke_free().
87 * @param context A hx509 context.
88 * @param ctx returns a newly allocated revokation context.
90 * @return An hx509 error code, see hx509_get_error_string().
92 * @ingroup hx509_revoke
96 hx509_revoke_init(hx509_context context, hx509_revoke_ctx *ctx)
98 *ctx = calloc(1, sizeof(**ctx));
103 (*ctx)->crls.len = 0;
104 (*ctx)->crls.val = NULL;
105 (*ctx)->ocsps.len = 0;
106 (*ctx)->ocsps.val = NULL;
112 _hx509_revoke_ref(hx509_revoke_ctx ctx)
117 _hx509_abort("revoke ctx refcount == 0 on ref");
119 if (ctx->ref == UINT_MAX)
120 _hx509_abort("revoke ctx refcount == UINT_MAX on ref");
125 free_ocsp(struct revoke_ocsp *ocsp)
128 free_OCSPBasicOCSPResponse(&ocsp->ocsp);
129 hx509_certs_free(&ocsp->certs);
130 hx509_cert_free(ocsp->signer);
134 * Free a hx509 revokation context.
136 * @param ctx context to be freed
138 * @ingroup hx509_revoke
142 hx509_revoke_free(hx509_revoke_ctx *ctx)
146 if (ctx == NULL || *ctx == NULL)
149 if ((*ctx)->ref == 0)
150 _hx509_abort("revoke ctx refcount == 0 on free");
151 if (--(*ctx)->ref > 0)
154 for (i = 0; i < (*ctx)->crls.len; i++) {
155 free((*ctx)->crls.val[i].path);
156 free_CRLCertificateList(&(*ctx)->crls.val[i].crl);
159 for (i = 0; i < (*ctx)->ocsps.len; i++)
160 free_ocsp(&(*ctx)->ocsps.val[i]);
161 free((*ctx)->ocsps.val);
163 free((*ctx)->crls.val);
165 memset(*ctx, 0, sizeof(**ctx));
171 verify_ocsp(hx509_context context,
172 struct revoke_ocsp *ocsp,
177 hx509_cert signer = NULL;
181 _hx509_query_clear(&q);
184 * Need to match on issuer too in case there are two CA that have
185 * issued the same name to a certificate. One example of this is
186 * the www.openvalidation.org test's ocsp validator.
189 q.match = HX509_QUERY_MATCH_ISSUER_NAME;
190 q.issuer_name = &_hx509_get_cert(parent)->tbsCertificate.issuer;
192 switch(ocsp->ocsp.tbsResponseData.responderID.element) {
193 case choice_OCSPResponderID_byName:
194 q.match |= HX509_QUERY_MATCH_SUBJECT_NAME;
195 q.subject_name = &ocsp->ocsp.tbsResponseData.responderID.u.byName;
197 case choice_OCSPResponderID_byKey:
198 q.match |= HX509_QUERY_MATCH_KEY_HASH_SHA1;
199 q.keyhash_sha1 = &ocsp->ocsp.tbsResponseData.responderID.u.byKey;
203 ret = hx509_certs_find(context, certs, &q, &signer);
204 if (ret && ocsp->certs)
205 ret = hx509_certs_find(context, ocsp->certs, &q, &signer);
210 * If signer certificate isn't the CA certificate, lets check the
211 * it is the CA that signed the signer certificate and the OCSP EKU
214 if (hx509_cert_cmp(signer, parent) != 0) {
215 Certificate *p = _hx509_get_cert(parent);
216 Certificate *s = _hx509_get_cert(signer);
218 ret = _hx509_cert_is_parent_cmp(s, p, 0);
220 ret = HX509_PARENT_NOT_CA;
221 hx509_set_error_string(context, 0, ret, "Revoke OCSP signer is "
222 "doesn't have CA as signer certificate");
226 ret = _hx509_verify_signature_bitstring(context,
228 &s->signatureAlgorithm,
229 &s->tbsCertificate._save,
232 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
233 "OCSP signer signature invalid");
237 ret = hx509_cert_check_eku(context, signer,
238 oid_id_pkix_kp_OCSPSigning(), 0);
243 ret = _hx509_verify_signature_bitstring(context,
244 _hx509_get_cert(signer),
245 &ocsp->ocsp.signatureAlgorithm,
246 &ocsp->ocsp.tbsResponseData._save,
247 &ocsp->ocsp.signature);
249 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
250 "OCSP signature invalid");
254 ocsp->signer = signer;
258 hx509_cert_free(signer);
268 parse_ocsp_basic(const void *data, size_t length, OCSPBasicOCSPResponse *basic)
274 memset(basic, 0, sizeof(*basic));
276 ret = decode_OCSPResponse(data, length, &resp, &size);
279 if (length != size) {
280 free_OCSPResponse(&resp);
281 return ASN1_EXTRA_DATA;
284 switch (resp.responseStatus) {
288 free_OCSPResponse(&resp);
289 return HX509_REVOKE_WRONG_DATA;
292 if (resp.responseBytes == NULL) {
293 free_OCSPResponse(&resp);
297 ret = der_heim_oid_cmp(&resp.responseBytes->responseType,
298 oid_id_pkix_ocsp_basic());
300 free_OCSPResponse(&resp);
301 return HX509_REVOKE_WRONG_DATA;
304 ret = decode_OCSPBasicOCSPResponse(resp.responseBytes->response.data,
305 resp.responseBytes->response.length,
309 free_OCSPResponse(&resp);
312 if (size != resp.responseBytes->response.length) {
313 free_OCSPResponse(&resp);
314 free_OCSPBasicOCSPResponse(basic);
315 return ASN1_EXTRA_DATA;
317 free_OCSPResponse(&resp);
327 load_ocsp(hx509_context context, struct revoke_ocsp *ocsp)
329 OCSPBasicOCSPResponse basic;
330 hx509_certs certs = NULL;
336 ret = rk_undumpdata(ocsp->path, &data, &length);
340 ret = stat(ocsp->path, &sb);
344 ret = parse_ocsp_basic(data, length, &basic);
347 hx509_set_error_string(context, 0, ret,
348 "Failed to parse OCSP response");
355 ret = hx509_certs_init(context, "MEMORY:ocsp-certs", 0,
358 free_OCSPBasicOCSPResponse(&basic);
362 for (i = 0; i < basic.certs->len; i++) {
365 ret = hx509_cert_init(context, &basic.certs->val[i], &c);
369 ret = hx509_certs_add(context, certs, c);
376 ocsp->last_modfied = sb.st_mtime;
378 free_OCSPBasicOCSPResponse(&ocsp->ocsp);
379 hx509_certs_free(&ocsp->certs);
380 hx509_cert_free(ocsp->signer);
390 * Add a OCSP file to the revokation context.
392 * @param context hx509 context
393 * @param ctx hx509 revokation context
394 * @param path path to file that is going to be added to the context.
396 * @return An hx509 error code, see hx509_get_error_string().
398 * @ingroup hx509_revoke
402 hx509_revoke_add_ocsp(hx509_context context,
403 hx509_revoke_ctx ctx,
410 if (strncmp(path, "FILE:", 5) != 0) {
411 hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION,
412 "unsupport type in %s", path);
413 return HX509_UNSUPPORTED_OPERATION;
418 for (i = 0; i < ctx->ocsps.len; i++) {
419 if (strcmp(ctx->ocsps.val[0].path, path) == 0)
423 data = realloc(ctx->ocsps.val,
424 (ctx->ocsps.len + 1) * sizeof(ctx->ocsps.val[0]));
426 hx509_clear_error_string(context);
430 ctx->ocsps.val = data;
432 memset(&ctx->ocsps.val[ctx->ocsps.len], 0,
433 sizeof(ctx->ocsps.val[0]));
435 ctx->ocsps.val[ctx->ocsps.len].path = strdup(path);
436 if (ctx->ocsps.val[ctx->ocsps.len].path == NULL) {
437 hx509_clear_error_string(context);
441 ret = load_ocsp(context, &ctx->ocsps.val[ctx->ocsps.len]);
443 free(ctx->ocsps.val[ctx->ocsps.len].path);
456 verify_crl(hx509_context context,
457 hx509_revoke_ctx ctx,
458 CRLCertificateList *crl,
468 t = _hx509_Time2time_t(&crl->tbsCertList.thisUpdate);
470 hx509_set_error_string(context, 0, HX509_CRL_USED_BEFORE_TIME,
471 "CRL used before time");
472 return HX509_CRL_USED_BEFORE_TIME;
475 if (crl->tbsCertList.nextUpdate == NULL) {
476 hx509_set_error_string(context, 0, HX509_CRL_INVALID_FORMAT,
477 "CRL missing nextUpdate");
478 return HX509_CRL_INVALID_FORMAT;
481 t = _hx509_Time2time_t(crl->tbsCertList.nextUpdate);
483 hx509_set_error_string(context, 0, HX509_CRL_USED_AFTER_TIME,
484 "CRL used after time");
485 return HX509_CRL_USED_AFTER_TIME;
488 _hx509_query_clear(&q);
491 * If it's the signer have CRLSIGN bit set, use that as the signer
492 * cert for the certificate, otherwise, search for a certificate.
494 if (_hx509_check_key_usage(context, parent, 1 << 6, FALSE) == 0) {
495 signer = hx509_cert_ref(parent);
497 q.match = HX509_QUERY_MATCH_SUBJECT_NAME;
498 q.match |= HX509_QUERY_KU_CRLSIGN;
499 q.subject_name = &crl->tbsCertList.issuer;
501 ret = hx509_certs_find(context, certs, &q, &signer);
503 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
504 "Failed to find certificate for CRL");
509 ret = _hx509_verify_signature_bitstring(context,
510 _hx509_get_cert(signer),
511 &crl->signatureAlgorithm,
512 &crl->tbsCertList._save,
513 &crl->signatureValue);
515 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
516 "CRL signature invalid");
521 * If signer is not CA cert, need to check revoke status of this
522 * CRL signing cert too, this include all parent CRL signer cert
523 * up to the root *sigh*, assume root at least hve CERTSIGN flag
526 while (_hx509_check_key_usage(context, signer, 1 << 5, TRUE)) {
527 hx509_cert crl_parent;
529 _hx509_query_clear(&q);
531 q.match = HX509_QUERY_MATCH_SUBJECT_NAME;
532 q.match |= HX509_QUERY_KU_CRLSIGN;
533 q.subject_name = &_hx509_get_cert(signer)->tbsCertificate.issuer;
535 ret = hx509_certs_find(context, certs, &q, &crl_parent);
537 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
538 "Failed to find parent of CRL signer");
542 ret = hx509_revoke_verify(context,
548 hx509_cert_free(signer);
551 hx509_set_error_string(context, HX509_ERROR_APPEND, ret,
552 "Failed to verify revoke "
553 "status of CRL signer");
559 hx509_cert_free(signer);
565 load_crl(const char *path, time_t *t, CRLCertificateList *crl)
572 memset(crl, 0, sizeof(*crl));
574 ret = rk_undumpdata(path, &data, &length);
578 ret = stat(path, &sb);
584 ret = decode_CRLCertificateList(data, length, crl, &size);
589 /* check signature is aligned */
590 if (crl->signatureValue.length & 7) {
591 free_CRLCertificateList(crl);
592 return HX509_CRYPTO_SIG_INVALID_FORMAT;
598 * Add a CRL file to the revokation context.
600 * @param context hx509 context
601 * @param ctx hx509 revokation context
602 * @param path path to file that is going to be added to the context.
604 * @return An hx509 error code, see hx509_get_error_string().
606 * @ingroup hx509_revoke
610 hx509_revoke_add_crl(hx509_context context,
611 hx509_revoke_ctx ctx,
618 if (strncmp(path, "FILE:", 5) != 0) {
619 hx509_set_error_string(context, 0, HX509_UNSUPPORTED_OPERATION,
620 "unsupport type in %s", path);
621 return HX509_UNSUPPORTED_OPERATION;
627 for (i = 0; i < ctx->crls.len; i++) {
628 if (strcmp(ctx->crls.val[0].path, path) == 0)
632 data = realloc(ctx->crls.val,
633 (ctx->crls.len + 1) * sizeof(ctx->crls.val[0]));
635 hx509_clear_error_string(context);
638 ctx->crls.val = data;
640 memset(&ctx->crls.val[ctx->crls.len], 0, sizeof(ctx->crls.val[0]));
642 ctx->crls.val[ctx->crls.len].path = strdup(path);
643 if (ctx->crls.val[ctx->crls.len].path == NULL) {
644 hx509_clear_error_string(context);
649 &ctx->crls.val[ctx->crls.len].last_modfied,
650 &ctx->crls.val[ctx->crls.len].crl);
652 free(ctx->crls.val[ctx->crls.len].path);
662 * Check that a certificate is not expired according to a revokation
663 * context. Also need the parent certificte to the check OCSP
666 * @param context hx509 context
667 * @param ctx hx509 revokation context
673 * @return An hx509 error code, see hx509_get_error_string().
675 * @ingroup hx509_revoke
680 hx509_revoke_verify(hx509_context context,
681 hx509_revoke_ctx ctx,
685 hx509_cert parent_cert)
687 const Certificate *c = _hx509_get_cert(cert);
688 const Certificate *p = _hx509_get_cert(parent_cert);
689 unsigned long i, j, k;
692 hx509_clear_error_string(context);
694 for (i = 0; i < ctx->ocsps.len; i++) {
695 struct revoke_ocsp *ocsp = &ctx->ocsps.val[i];
698 /* check this ocsp apply to this cert */
700 /* check if there is a newer version of the file */
701 ret = stat(ocsp->path, &sb);
702 if (ret == 0 && ocsp->last_modfied != sb.st_mtime) {
703 ret = load_ocsp(context, ocsp);
708 /* verify signature in ocsp if not already done */
709 if (ocsp->signer == NULL) {
710 ret = verify_ocsp(context, ocsp, now, certs, parent_cert);
715 for (j = 0; j < ocsp->ocsp.tbsResponseData.responses.len; j++) {
716 heim_octet_string os;
718 ret = der_heim_integer_cmp(&ocsp->ocsp.tbsResponseData.responses.val[j].certID.serialNumber,
719 &c->tbsCertificate.serialNumber);
723 /* verify issuer hashes hash */
724 ret = _hx509_verify_signature(context,
726 &ocsp->ocsp.tbsResponseData.responses.val[i].certID.hashAlgorithm,
727 &c->tbsCertificate.issuer._save,
728 &ocsp->ocsp.tbsResponseData.responses.val[i].certID.issuerNameHash);
732 os.data = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.data;
733 os.length = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.length / 8;
735 ret = _hx509_verify_signature(context,
737 &ocsp->ocsp.tbsResponseData.responses.val[j].certID.hashAlgorithm,
739 &ocsp->ocsp.tbsResponseData.responses.val[j].certID.issuerKeyHash);
743 switch (ocsp->ocsp.tbsResponseData.responses.val[j].certStatus.element) {
744 case choice_OCSPCertStatus_good:
746 case choice_OCSPCertStatus_revoked:
747 hx509_set_error_string(context, 0,
749 "Certificate revoked by issuer in OCSP");
750 return HX509_CERT_REVOKED;
751 case choice_OCSPCertStatus_unknown:
755 /* don't allow the update to be in the future */
756 if (ocsp->ocsp.tbsResponseData.responses.val[j].thisUpdate >
757 now + context->ocsp_time_diff)
760 /* don't allow the next update to be in the past */
761 if (ocsp->ocsp.tbsResponseData.responses.val[j].nextUpdate) {
762 if (*ocsp->ocsp.tbsResponseData.responses.val[j].nextUpdate < now)
765 /* Should force a refetch, but can we ? */;
771 for (i = 0; i < ctx->crls.len; i++) {
772 struct revoke_crl *crl = &ctx->crls.val[i];
776 /* check if cert.issuer == crls.val[i].crl.issuer */
777 ret = _hx509_name_cmp(&c->tbsCertificate.issuer,
778 &crl->crl.tbsCertList.issuer, &diff);
782 ret = stat(crl->path, &sb);
783 if (ret == 0 && crl->last_modfied != sb.st_mtime) {
784 CRLCertificateList cl;
786 ret = load_crl(crl->path, &crl->last_modfied, &cl);
788 free_CRLCertificateList(&crl->crl);
791 crl->failed_verify = 0;
794 if (crl->failed_verify)
797 /* verify signature in crl if not already done */
798 if (crl->verified == 0) {
799 ret = verify_crl(context, ctx, &crl->crl, now, certs, parent_cert);
801 crl->failed_verify = 1;
807 if (crl->crl.tbsCertList.crlExtensions) {
808 for (j = 0; j < crl->crl.tbsCertList.crlExtensions->len; j++) {
809 if (crl->crl.tbsCertList.crlExtensions->val[j].critical) {
810 hx509_set_error_string(context, 0,
811 HX509_CRL_UNKNOWN_EXTENSION,
812 "Unknown CRL extension");
813 return HX509_CRL_UNKNOWN_EXTENSION;
818 if (crl->crl.tbsCertList.revokedCertificates == NULL)
821 /* check if cert is in crl */
822 for (j = 0; j < crl->crl.tbsCertList.revokedCertificates->len; j++) {
825 ret = der_heim_integer_cmp(&crl->crl.tbsCertList.revokedCertificates->val[j].userCertificate,
826 &c->tbsCertificate.serialNumber);
830 t = _hx509_Time2time_t(&crl->crl.tbsCertList.revokedCertificates->val[j].revocationDate);
834 if (crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions)
835 for (k = 0; k < crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions->len; k++)
836 if (crl->crl.tbsCertList.revokedCertificates->val[j].crlEntryExtensions->val[k].critical)
837 return HX509_CRL_UNKNOWN_EXTENSION;
839 hx509_set_error_string(context, 0,
841 "Certificate revoked by issuer in CRL");
842 return HX509_CERT_REVOKED;
849 if (context->flags & HX509_CTX_VERIFY_MISSING_OK)
851 hx509_set_error_string(context, HX509_ERROR_APPEND,
852 HX509_REVOKE_STATUS_MISSING,
853 "No revoke status found for "
855 return HX509_REVOKE_STATUS_MISSING;
858 struct ocsp_add_ctx {
861 const AlgorithmIdentifier *digest;
866 add_to_req(hx509_context context, void *ptr, hx509_cert cert)
868 struct ocsp_add_ctx *ctx = ptr;
869 OCSPInnerRequest *one;
870 hx509_cert parent = NULL;
871 Certificate *p, *c = _hx509_get_cert(cert);
872 heim_octet_string os;
877 d = realloc(ctx->req->requestList.val,
878 sizeof(ctx->req->requestList.val[0]) *
879 (ctx->req->requestList.len + 1));
882 ctx->req->requestList.val = d;
884 one = &ctx->req->requestList.val[ctx->req->requestList.len];
885 memset(one, 0, sizeof(*one));
887 _hx509_query_clear(&q);
889 q.match |= HX509_QUERY_FIND_ISSUER_CERT;
892 ret = hx509_certs_find(context, ctx->certs, &q, &parent);
897 if (hx509_cert_cmp(ctx->parent, parent) != 0) {
898 ret = HX509_REVOKE_NOT_SAME_PARENT;
899 hx509_set_error_string(context, 0, ret,
900 "Not same parent certifate as "
901 "last certificate in request");
905 ctx->parent = hx509_cert_ref(parent);
907 p = _hx509_get_cert(parent);
909 ret = copy_AlgorithmIdentifier(ctx->digest, &one->reqCert.hashAlgorithm);
913 ret = _hx509_create_signature(context,
915 &one->reqCert.hashAlgorithm,
916 &c->tbsCertificate.issuer._save,
918 &one->reqCert.issuerNameHash);
922 os.data = p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.data;
924 p->tbsCertificate.subjectPublicKeyInfo.subjectPublicKey.length / 8;
926 ret = _hx509_create_signature(context,
928 &one->reqCert.hashAlgorithm,
931 &one->reqCert.issuerKeyHash);
935 ret = copy_CertificateSerialNumber(&c->tbsCertificate.serialNumber,
936 &one->reqCert.serialNumber);
940 ctx->req->requestList.len++;
942 hx509_cert_free(parent);
944 free_OCSPInnerRequest(one);
945 memset(one, 0, sizeof(*one));
952 * Create an OCSP request for a set of certificates.
954 * @param context a hx509 context
955 * @param reqcerts list of certificates to request ocsp data for
956 * @param pool certificate pool to use when signing
957 * @param signer certificate to use to sign the request
958 * @param digest the signing algorithm in the request, if NULL use the
959 * default signature algorithm,
960 * @param request the encoded request, free with free_heim_octet_string().
961 * @param nonce nonce in the request, free with free_heim_octet_string().
963 * @return An hx509 error code, see hx509_get_error_string().
965 * @ingroup hx509_revoke
969 hx509_ocsp_request(hx509_context context,
970 hx509_certs reqcerts,
973 const AlgorithmIdentifier *digest,
974 heim_octet_string *request,
975 heim_octet_string *nonce)
980 struct ocsp_add_ctx ctx;
983 memset(&req, 0, sizeof(req));
986 digest = _hx509_crypto_default_digest_alg;
988 ctx.req = &req.tbsRequest;
993 ret = hx509_certs_iter(context, reqcerts, add_to_req, &ctx);
994 hx509_cert_free(ctx.parent);
999 req.tbsRequest.requestExtensions =
1000 calloc(1, sizeof(*req.tbsRequest.requestExtensions));
1001 if (req.tbsRequest.requestExtensions == NULL) {
1006 es = req.tbsRequest.requestExtensions;
1008 es->val = calloc(es->len, sizeof(es->val[0]));
1009 if (es->val == NULL) {
1015 ret = der_copy_oid(oid_id_pkix_ocsp_nonce(), &es->val[0].extnID);
1017 free_OCSPRequest(&req);
1021 es->val[0].extnValue.data = malloc(10);
1022 if (es->val[0].extnValue.data == NULL) {
1026 es->val[0].extnValue.length = 10;
1028 ret = RAND_bytes(es->val[0].extnValue.data,
1029 es->val[0].extnValue.length);
1031 ret = HX509_CRYPTO_INTERNAL_ERROR;
1034 ret = der_copy_octet_string(nonce, &es->val[0].extnValue);
1041 ASN1_MALLOC_ENCODE(OCSPRequest, request->data, request->length,
1043 free_OCSPRequest(&req);
1046 if (size != request->length)
1047 _hx509_abort("internal ASN.1 encoder error");
1052 free_OCSPRequest(&req);
1057 printable_time(time_t t)
1060 strlcpy(s, ctime(&t)+ 4, sizeof(s));
1066 * Print the OCSP reply stored in a file.
1068 * @param context a hx509 context
1069 * @param path path to a file with a OCSP reply
1070 * @param out the out FILE descriptor to print the reply on
1072 * @return An hx509 error code, see hx509_get_error_string().
1074 * @ingroup hx509_revoke
1078 hx509_revoke_ocsp_print(hx509_context context, const char *path, FILE *out)
1080 struct revoke_ocsp ocsp;
1086 memset(&ocsp, 0, sizeof(ocsp));
1088 ocsp.path = strdup(path);
1089 if (ocsp.path == NULL)
1092 ret = load_ocsp(context, &ocsp);
1098 fprintf(out, "signer: ");
1100 switch(ocsp.ocsp.tbsResponseData.responderID.element) {
1101 case choice_OCSPResponderID_byName: {
1104 _hx509_name_from_Name(&ocsp.ocsp.tbsResponseData.responderID.u.byName, &n);
1105 hx509_name_to_string(n, &s);
1106 hx509_name_free(&n);
1107 fprintf(out, " byName: %s\n", s);
1111 case choice_OCSPResponderID_byKey: {
1113 hex_encode(ocsp.ocsp.tbsResponseData.responderID.u.byKey.data,
1114 ocsp.ocsp.tbsResponseData.responderID.u.byKey.length,
1116 fprintf(out, " byKey: %s\n", s);
1121 _hx509_abort("choice_OCSPResponderID unknown");
1125 fprintf(out, "producedAt: %s\n",
1126 printable_time(ocsp.ocsp.tbsResponseData.producedAt));
1128 fprintf(out, "replies: %d\n", ocsp.ocsp.tbsResponseData.responses.len);
1130 for (i = 0; i < ocsp.ocsp.tbsResponseData.responses.len; i++) {
1132 switch (ocsp.ocsp.tbsResponseData.responses.val[i].certStatus.element) {
1133 case choice_OCSPCertStatus_good:
1136 case choice_OCSPCertStatus_revoked:
1139 case choice_OCSPCertStatus_unknown:
1143 status = "element unknown";
1146 fprintf(out, "\t%d. status: %s\n", i, status);
1148 fprintf(out, "\tthisUpdate: %s\n",
1149 printable_time(ocsp.ocsp.tbsResponseData.responses.val[i].thisUpdate));
1150 if (ocsp.ocsp.tbsResponseData.responses.val[i].nextUpdate)
1151 fprintf(out, "\tproducedAt: %s\n",
1152 printable_time(ocsp.ocsp.tbsResponseData.responses.val[i].thisUpdate));
1156 fprintf(out, "appended certs:\n");
1158 ret = hx509_certs_iter(context, ocsp.certs, hx509_ci_print_names, out);
1165 * Verify that the certificate is part of the OCSP reply and it's not
1166 * expired. Doesn't verify signature the OCSP reply or it's done by a
1167 * authorized sender, that is assumed to be already done.
1169 * @param context a hx509 context
1170 * @param now the time right now, if 0, use the current time.
1171 * @param cert the certificate to verify
1172 * @param flags flags control the behavior
1173 * @param data pointer to the encode ocsp reply
1174 * @param length the length of the encode ocsp reply
1175 * @param expiration return the time the OCSP will expire and need to
1178 * @return An hx509 error code, see hx509_get_error_string().
1180 * @ingroup hx509_verify
1184 hx509_ocsp_verify(hx509_context context,
1188 const void *data, size_t length,
1191 const Certificate *c = _hx509_get_cert(cert);
1192 OCSPBasicOCSPResponse basic;
1200 ret = parse_ocsp_basic(data, length, &basic);
1202 hx509_set_error_string(context, 0, ret,
1203 "Failed to parse OCSP response");
1207 for (i = 0; i < basic.tbsResponseData.responses.len; i++) {
1209 ret = der_heim_integer_cmp(&basic.tbsResponseData.responses.val[i].certID.serialNumber,
1210 &c->tbsCertificate.serialNumber);
1214 /* verify issuer hashes hash */
1215 ret = _hx509_verify_signature(context,
1217 &basic.tbsResponseData.responses.val[i].certID.hashAlgorithm,
1218 &c->tbsCertificate.issuer._save,
1219 &basic.tbsResponseData.responses.val[i].certID.issuerNameHash);
1223 switch (basic.tbsResponseData.responses.val[i].certStatus.element) {
1224 case choice_OCSPCertStatus_good:
1226 case choice_OCSPCertStatus_revoked:
1227 case choice_OCSPCertStatus_unknown:
1231 /* don't allow the update to be in the future */
1232 if (basic.tbsResponseData.responses.val[i].thisUpdate >
1233 now + context->ocsp_time_diff)
1236 /* don't allow the next update to be in the past */
1237 if (basic.tbsResponseData.responses.val[i].nextUpdate) {
1238 if (*basic.tbsResponseData.responses.val[i].nextUpdate < now)
1240 *expiration = *basic.tbsResponseData.responses.val[i].nextUpdate;
1244 free_OCSPBasicOCSPResponse(&basic);
1248 free_OCSPBasicOCSPResponse(&basic);
1254 ret = hx509_cert_get_subject(cert, &name);
1256 hx509_clear_error_string(context);
1259 ret = hx509_name_to_string(name, &subject);
1260 hx509_name_free(&name);
1262 hx509_clear_error_string(context);
1265 hx509_set_error_string(context, 0, HX509_CERT_NOT_IN_OCSP,
1266 "Certificate %s not in OCSP response "
1272 return HX509_CERT_NOT_IN_OCSP;
1276 hx509_certs revoked;
1281 * Create a CRL context. Use hx509_crl_free() to free the CRL context.
1283 * @param context a hx509 context.
1284 * @param crl return pointer to a newly allocated CRL context.
1286 * @return An hx509 error code, see hx509_get_error_string().
1288 * @ingroup hx509_verify
1292 hx509_crl_alloc(hx509_context context, hx509_crl *crl)
1296 *crl = calloc(1, sizeof(**crl));
1298 hx509_set_error_string(context, 0, ENOMEM, "out of memory");
1302 ret = hx509_certs_init(context, "MEMORY:crl", 0, NULL, &(*crl)->revoked);
1313 * Add revoked certificate to an CRL context.
1315 * @param context a hx509 context.
1316 * @param crl the CRL to add the revoked certificate to.
1317 * @param certs keyset of certificate to revoke.
1319 * @return An hx509 error code, see hx509_get_error_string().
1321 * @ingroup hx509_verify
1325 hx509_crl_add_revoked_certs(hx509_context context,
1329 return hx509_certs_merge(context, crl->revoked, certs);
1333 * Set the lifetime of a CRL context.
1335 * @param context a hx509 context.
1336 * @param crl a CRL context
1337 * @param delta delta time the certificate is valid, library adds the
1338 * current time to this.
1340 * @return An hx509 error code, see hx509_get_error_string().
1342 * @ingroup hx509_verify
1346 hx509_crl_lifetime(hx509_context context, hx509_crl crl, int delta)
1348 crl->expire = time(NULL) + delta;
1353 * Free a CRL context.
1355 * @param context a hx509 context.
1356 * @param crl a CRL context to free.
1358 * @ingroup hx509_verify
1362 hx509_crl_free(hx509_context context, hx509_crl *crl)
1366 hx509_certs_free(&(*crl)->revoked);
1367 memset(*crl, 0, sizeof(**crl));
1373 add_revoked(hx509_context context, void *ctx, hx509_cert cert)
1375 TBSCRLCertList *c = ctx;
1380 num = c->revokedCertificates->len;
1381 ptr = realloc(c->revokedCertificates->val,
1382 (num + 1) * sizeof(c->revokedCertificates->val[0]));
1384 hx509_clear_error_string(context);
1387 c->revokedCertificates->val = ptr;
1389 ret = hx509_cert_get_serialnumber(cert,
1390 &c->revokedCertificates->val[num].userCertificate);
1392 hx509_clear_error_string(context);
1395 c->revokedCertificates->val[num].revocationDate.element =
1396 choice_Time_generalTime;
1397 c->revokedCertificates->val[num].revocationDate.u.generalTime =
1398 time(NULL) - 3600 * 24;
1399 c->revokedCertificates->val[num].crlEntryExtensions = NULL;
1401 c->revokedCertificates->len++;
1407 * Sign a CRL and return an encode certificate.
1409 * @param context a hx509 context.
1410 * @param signer certificate to sign the CRL with
1411 * @param crl the CRL to sign
1412 * @param os return the signed and encoded CRL, free with
1413 * free_heim_octet_string()
1415 * @return An hx509 error code, see hx509_get_error_string().
1417 * @ingroup hx509_verify
1421 hx509_crl_sign(hx509_context context,
1424 heim_octet_string *os)
1426 const AlgorithmIdentifier *sigalg = _hx509_crypto_default_sig_alg;
1427 CRLCertificateList c;
1430 hx509_private_key signerkey;
1432 memset(&c, 0, sizeof(c));
1434 signerkey = _hx509_cert_private_key(signer);
1435 if (signerkey == NULL) {
1436 ret = HX509_PRIVATE_KEY_MISSING;
1437 hx509_set_error_string(context, 0, ret,
1438 "Private key missing for CRL signing");
1442 c.tbsCertList.version = malloc(sizeof(*c.tbsCertList.version));
1443 if (c.tbsCertList.version == NULL) {
1444 hx509_set_error_string(context, 0, ENOMEM, "out of memory");
1448 *c.tbsCertList.version = 1;
1450 ret = copy_AlgorithmIdentifier(sigalg, &c.tbsCertList.signature);
1452 hx509_clear_error_string(context);
1456 ret = copy_Name(&_hx509_get_cert(signer)->tbsCertificate.issuer,
1457 &c.tbsCertList.issuer);
1459 hx509_clear_error_string(context);
1463 c.tbsCertList.thisUpdate.element = choice_Time_generalTime;
1464 c.tbsCertList.thisUpdate.u.generalTime = time(NULL) - 24 * 3600;
1466 c.tbsCertList.nextUpdate = malloc(sizeof(*c.tbsCertList.nextUpdate));
1467 if (c.tbsCertList.nextUpdate == NULL) {
1468 hx509_set_error_string(context, 0, ENOMEM, "out of memory");
1474 time_t next = crl->expire;
1476 next = time(NULL) + 24 * 3600 * 365;
1478 c.tbsCertList.nextUpdate->element = choice_Time_generalTime;
1479 c.tbsCertList.nextUpdate->u.generalTime = next;
1482 c.tbsCertList.revokedCertificates =
1483 calloc(1, sizeof(*c.tbsCertList.revokedCertificates));
1484 if (c.tbsCertList.revokedCertificates == NULL) {
1485 hx509_set_error_string(context, 0, ENOMEM, "out of memory");
1489 c.tbsCertList.crlExtensions = NULL;
1491 ret = hx509_certs_iter(context, crl->revoked, add_revoked, &c.tbsCertList);
1495 /* if not revoked certs, remove OPTIONAL entry */
1496 if (c.tbsCertList.revokedCertificates->len == 0) {
1497 free(c.tbsCertList.revokedCertificates);
1498 c.tbsCertList.revokedCertificates = NULL;
1501 ASN1_MALLOC_ENCODE(TBSCRLCertList, os->data, os->length,
1502 &c.tbsCertList, &size, ret);
1504 hx509_set_error_string(context, 0, ret, "failed to encode tbsCRL");
1507 if (size != os->length)
1508 _hx509_abort("internal ASN.1 encoder error");
1511 ret = _hx509_create_signature_bitstring(context,
1515 &c.signatureAlgorithm,
1519 ASN1_MALLOC_ENCODE(CRLCertificateList, os->data, os->length,
1521 free_CRLCertificateList(&c);
1523 hx509_set_error_string(context, 0, ret, "failed to encode CRL");
1526 if (size != os->length)
1527 _hx509_abort("internal ASN.1 encoder error");
1532 free_CRLCertificateList(&c);