2 * Copyright 2007-2019 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright Nokia 2007-2018
4 * Copyright Siemens AG 2015-2019
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
11 * CRMF implementation by Martin Peylo, Miikka Viljanen, and David von Oheimb.
15 * This file contains the functions that handle the individual items inside
22 * The 0 functions use the supplied structure pointer directly in the parent and
23 * it will be freed up when the parent is freed.
25 * The 1 functions use a copy of the supplied structure pointer (or in some
26 * cases increases its link count) in the parent and so both should be freed up.
29 #include <openssl/asn1t.h>
31 #include "crmf_local.h"
32 #include "internal/constant_time.h"
34 /* explicit #includes not strictly needed since implied by the above: */
35 #include <openssl/crmf.h>
36 #include <openssl/err.h>
37 #include <openssl/evp.h>
40 * atyp = Attribute Type
42 * ctrlinf = "regCtrl" or "regInfo"
44 #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \
45 int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, \
48 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \
50 if (msg == NULL || in == NULL) \
52 if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \
54 if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \
56 if ((atav->value.atyp = valt##_dup(in)) == NULL) \
58 if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \
62 OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \
68 * Pushes the given control attribute into the controls stack of a CertRequest
70 * returns 1 on success, 0 on error
72 static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm,
73 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl)
77 if (crm == NULL || crm->certReq == NULL || ctrl == NULL) {
78 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, CRMF_R_NULL_ARGUMENT);
82 if (crm->certReq->controls == NULL) {
83 crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
84 if (crm->certReq->controls == NULL)
88 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl))
94 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls);
95 crm->certReq->controls = NULL;
100 /* id-regCtrl-regToken Control (section 6.1) */
101 IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl)
103 /* id-regCtrl-authenticator Control (section 6.2) */
104 #define ASN1_UTF8STRING_dup ASN1_STRING_dup
105 IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl)
107 int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi,
108 int method, GENERAL_NAME *nm)
111 || method < OSSL_CRMF_PUB_METHOD_DONTCARE
112 || method > OSSL_CRMF_PUB_METHOD_LDAP) {
113 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO,
114 ERR_R_PASSED_INVALID_ARGUMENT);
118 if (!ASN1_INTEGER_set(spi->pubMethod, method))
120 GENERAL_NAME_free(spi->pubLocation);
121 spi->pubLocation = nm;
126 OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(OSSL_CRMF_PKIPUBLICATIONINFO *pi,
127 OSSL_CRMF_SINGLEPUBINFO *spi)
129 if (pi == NULL || spi == NULL) {
130 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO,
131 CRMF_R_NULL_ARGUMENT);
134 if (pi->pubInfos == NULL)
135 pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null();
136 if (pi->pubInfos == NULL)
139 return sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi);
142 int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(OSSL_CRMF_PKIPUBLICATIONINFO *pi,
146 || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH
147 || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) {
148 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION,
149 ERR_R_PASSED_INVALID_ARGUMENT);
153 return ASN1_INTEGER_set(pi->action, action);
156 /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */
157 IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO,
160 /* id-regCtrl-oldCertID Control (section 6.5) from the given */
161 IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl)
163 OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer,
164 const ASN1_INTEGER *serial)
166 OSSL_CRMF_CERTID *cid = NULL;
168 if (issuer == NULL || serial == NULL) {
169 CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, CRMF_R_NULL_ARGUMENT);
173 if ((cid = OSSL_CRMF_CERTID_new()) == NULL)
176 if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer))
178 cid->issuer->type = GEN_DIRNAME;
180 ASN1_INTEGER_free(cid->serialNumber);
181 if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
187 OSSL_CRMF_CERTID_free(cid);
192 * id-regCtrl-protocolEncrKey Control (section 6.6)
194 IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl)
197 * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack.
199 * returns 1 on success, 0 on error
201 static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm,
202 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri)
204 STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL;
206 if (crm == NULL || ri == NULL) {
207 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT);
211 if (crm->regInfo == NULL)
212 crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
213 if (crm->regInfo == NULL)
215 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri))
222 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info);
226 /* id-regInfo-utf8Pairs to regInfo (section 7.1) */
227 IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo)
229 /* id-regInfo-certReq to regInfo (section 7.2) */
230 IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo)
233 /* retrieves the certificate template of crm */
234 OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm)
236 if (crm == NULL || crm->certReq == NULL) {
237 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT);
240 return crm->certReq->certTemplate;
244 int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to)
246 OSSL_CRMF_OPTIONALVALIDITY *vld = NULL;
247 ASN1_TIME *from_asn = NULL;
248 ASN1_TIME *to_asn = NULL;
249 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
251 if (tmpl == NULL) { /* also crm == NULL implies this */
252 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT);
256 if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL))
258 if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL))
260 if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL)
263 vld->notBefore = from_asn;
264 vld->notAfter = to_asn;
266 tmpl->validity = vld;
270 ASN1_TIME_free(from_asn);
271 ASN1_TIME_free(to_asn);
276 int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid)
278 if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) {
279 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT);
283 return ASN1_INTEGER_set(crm->certReq->certReqId, rid);
286 /* get ASN.1 encoded integer, return -1 on error */
287 static int crmf_asn1_get_int(const ASN1_INTEGER *a)
291 if (!ASN1_INTEGER_get_int64(&res, a)) {
292 CRMFerr(0, ASN1_R_INVALID_NUMBER);
296 CRMFerr(0, ASN1_R_TOO_SMALL);
300 CRMFerr(0, ASN1_R_TOO_LARGE);
306 int OSSL_CRMF_MSG_get_certReqId(const OSSL_CRMF_MSG *crm)
308 if (crm == NULL || /* not really needed: */ crm->certReq == NULL) {
309 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT);
312 return crmf_asn1_get_int(crm->certReq->certReqId);
316 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm,
317 X509_EXTENSIONS *exts)
319 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
321 if (tmpl == NULL) { /* also crm == NULL implies this */
322 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT);
326 if (sk_X509_EXTENSION_num(exts) == 0) {
327 sk_X509_EXTENSION_free(exts);
328 exts = NULL; /* do not include empty extensions list */
331 sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free);
332 tmpl->extensions = exts;
337 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm,
341 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
343 if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */
344 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT);
348 if (tmpl->extensions == NULL) {
349 if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL)
354 if (!sk_X509_EXTENSION_push(tmpl->extensions, ext))
359 sk_X509_EXTENSION_free(tmpl->extensions);
360 tmpl->extensions = NULL;
365 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
366 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps,
367 OSSL_CRMF_CERTREQUEST *cr,
368 EVP_PKEY *pkey, int dgst)
371 EVP_MD *fetched_md = NULL;
372 const EVP_MD *md = EVP_get_digestbynid(dgst);
374 if (ps == NULL || cr == NULL || pkey == NULL) {
375 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT);
379 /* If we didn't find legacy MD, we try an implicit fetch */
381 md = fetched_md = EVP_MD_fetch(NULL, OBJ_nid2sn(dgst), NULL);
384 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
385 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
389 ret = ASN1_item_sign(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
390 ps->algorithmIdentifier, NULL, ps->signature,
393 EVP_MD_free(fetched_md);
398 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey,
401 OSSL_CRMF_POPO *pp = NULL;
402 ASN1_INTEGER *tag = NULL;
404 if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) {
405 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT);
409 if (ppmtd == OSSL_CRMF_POPO_NONE)
411 if ((pp = OSSL_CRMF_POPO_new()) == NULL)
416 case OSSL_CRMF_POPO_RAVERIFIED:
417 if ((pp->value.raVerified = ASN1_NULL_new()) == NULL)
421 case OSSL_CRMF_POPO_SIGNATURE:
423 OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new();
425 || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)) {
426 OSSL_CRMF_POPOSIGNINGKEY_free(ps);
429 pp->value.signature = ps;
433 case OSSL_CRMF_POPO_KEYENC:
434 if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL)
436 tag = ASN1_INTEGER_new();
437 pp->value.keyEncipherment->type =
438 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE;
439 pp->value.keyEncipherment->value.subsequentMessage = tag;
441 || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT))
446 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO,
447 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO);
452 OSSL_CRMF_POPO_free(crm->popo);
457 OSSL_CRMF_POPO_free(pp);
461 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
462 static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b)
464 X509_ALGOR *algA = NULL, *algB = NULL;
469 if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a)
472 if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b)
475 if ((res = X509_ALGOR_cmp(algA, algB)) != 0)
477 return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b));
480 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
481 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs,
482 int rid, int acceptRAVerified)
484 OSSL_CRMF_MSG *req = NULL;
485 X509_PUBKEY *pubkey = NULL;
486 OSSL_CRMF_POPOSIGNINGKEY *sig = NULL;
488 if (reqs == NULL || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL) {
489 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, CRMF_R_NULL_ARGUMENT);
493 if (req->popo == NULL) {
494 CRMFerr(0, CRMF_R_POPO_MISSING);
498 switch (req->popo->type) {
499 case OSSL_CRMF_POPO_RAVERIFIED:
500 if (!acceptRAVerified) {
501 CRMFerr(0, CRMF_R_POPO_RAVERIFIED_NOT_ACCEPTED);
505 case OSSL_CRMF_POPO_SIGNATURE:
506 pubkey = req->certReq->certTemplate->publicKey;
507 if (pubkey == NULL) {
508 CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY);
511 sig = req->popo->value.signature;
512 if (sig->poposkInput != NULL) {
514 * According to RFC 4211: publicKey contains a copy of
515 * the public key from the certificate template. This MUST be
516 * exactly the same value as contained in the certificate template.
518 if (sig->poposkInput->publicKey == NULL) {
519 CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY);
522 if (X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey) != 0) {
523 CRMFerr(0, CRMF_R_POPO_INCONSISTENT_PUBLIC_KEY);
527 * TODO check the contents of the authInfo sub-field,
528 * see RFC 4211 https://tools.ietf.org/html/rfc4211#section-4.1
530 if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT),
531 sig->algorithmIdentifier, sig->signature,
533 X509_PUBKEY_get0(pubkey)) < 1)
536 if (req->certReq->certTemplate->subject == NULL) {
537 CRMFerr(0, CRMF_R_POPO_MISSING_SUBJECT);
540 if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
541 sig->algorithmIdentifier, sig->signature,
542 req->certReq, X509_PUBKEY_get0(pubkey)) < 1)
546 case OSSL_CRMF_POPO_KEYENC:
548 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
549 * return 1 if the type of req->popo->value.keyEncipherment
550 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
551 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
553 case OSSL_CRMF_POPO_KEYAGREE:
555 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
556 CRMF_R_UNSUPPORTED_POPO_METHOD);
562 /* retrieves the serialNumber of the given cert template or NULL on error */
564 *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(const OSSL_CRMF_CERTTEMPLATE *tmpl)
566 return tmpl != NULL ? tmpl->serialNumber : NULL;
569 /* retrieves the issuer name of the given cert template or NULL on error */
571 *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl)
573 return tmpl != NULL ? tmpl->issuer : NULL;
576 /* retrieves the issuer name of the given CertId or NULL on error */
577 X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid)
579 return cid != NULL && cid->issuer->type == GEN_DIRNAME ?
580 cid->issuer->d.directoryName : NULL;
583 /* retrieves the serialNumber of the given CertId or NULL on error */
584 ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid)
586 return cid != NULL ? cid->serialNumber : NULL;
590 * fill in certificate template.
591 * Any value argument that is NULL will leave the respective field unchanged.
593 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl,
595 const X509_NAME *subject,
596 const X509_NAME *issuer,
597 const ASN1_INTEGER *serial)
600 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT);
603 if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject))
605 if (issuer != NULL && !X509_NAME_set(&tmpl->issuer, issuer))
607 if (serial != NULL) {
608 ASN1_INTEGER_free(tmpl->serialNumber);
609 if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
612 if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey))
619 * Decrypts the certificate in the given encryptedValue using private key pkey.
620 * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2.
622 * returns a pointer to the decrypted certificate
623 * returns NULL on error or if no certificate available
625 X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(const OSSL_CRMF_ENCRYPTEDVALUE *ecert,
628 X509 *cert = NULL; /* decrypted certificate */
629 EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */
630 unsigned char *ek = NULL; /* decrypted symmetric encryption key */
631 size_t eksize = 0; /* size of decrypted symmetric encryption key */
632 const EVP_CIPHER *cipher = NULL; /* used cipher */
633 int cikeysize = 0; /* key size from cipher */
634 unsigned char *iv = NULL; /* initial vector for symmetric encryption */
635 unsigned char *outbuf = NULL; /* decryption output buffer */
636 const unsigned char *p = NULL; /* needed for decoding ASN1 */
637 int symmAlg = 0; /* NIDs for symmetric algorithm */
639 EVP_PKEY_CTX *pkctx = NULL; /* private key context */
641 if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL
642 || ecert->encValue == NULL || pkey == NULL) {
643 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
644 CRMF_R_NULL_ARGUMENT);
647 if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) {
648 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
649 CRMF_R_UNSUPPORTED_CIPHER);
652 /* select symmetric cipher based on algorithm given in message */
653 if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) {
654 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
655 CRMF_R_UNSUPPORTED_CIPHER);
658 cikeysize = EVP_CIPHER_key_length(cipher);
659 /* first the symmetric key needs to be decrypted */
660 pkctx = EVP_PKEY_CTX_new(pkey, NULL);
661 if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) {
662 ASN1_BIT_STRING *encKey = ecert->encSymmKey;
666 if (EVP_PKEY_decrypt(pkctx, NULL, &eksize,
667 encKey->data, encKey->length) <= 0
668 || (ek = OPENSSL_malloc(eksize)) == NULL)
670 retval = EVP_PKEY_decrypt(pkctx, ek, &eksize,
671 encKey->data, encKey->length);
672 ERR_clear_error(); /* error state may have sensitive information */
673 failure = ~constant_time_is_zero_s(constant_time_msb(retval)
674 | constant_time_is_zero(retval));
675 failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize);
677 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
678 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY);
684 if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL)
686 if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv,
687 EVP_CIPHER_iv_length(cipher))
688 != EVP_CIPHER_iv_length(cipher)) {
689 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
690 CRMF_R_MALFORMED_IV);
695 * d2i_X509 changes the given pointer, so use p for decoding the message and
696 * keep the original pointer in outbuf so the memory can be freed later
698 if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length +
699 EVP_CIPHER_block_size(cipher))) == NULL
700 || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL)
702 EVP_CIPHER_CTX_set_padding(evp_ctx, 0);
704 if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv)
705 || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen,
706 ecert->encValue->data,
707 ecert->encValue->length)
708 || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) {
709 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
710 CRMF_R_ERROR_DECRYPTING_CERTIFICATE);
715 /* convert decrypted certificate from DER to internal ASN.1 structure */
716 if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) {
717 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
718 CRMF_R_ERROR_DECODING_CERTIFICATE);
721 EVP_PKEY_CTX_free(pkctx);
722 OPENSSL_free(outbuf);
723 EVP_CIPHER_CTX_free(evp_ctx);
724 OPENSSL_clear_free(ek, eksize);