2 * Copyright 2007-2020 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>
39 DEFINE_STACK_OF(X509_EXTENSION)
40 DEFINE_STACK_OF(OSSL_CRMF_MSG)
43 * atyp = Attribute Type
45 * ctrlinf = "regCtrl" or "regInfo"
47 #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \
48 int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, \
51 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \
53 if (msg == NULL || in == NULL) \
55 if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \
57 if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \
59 if ((atav->value.atyp = valt##_dup(in)) == NULL) \
61 if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \
65 OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \
71 * Pushes the given control attribute into the controls stack of a CertRequest
73 * returns 1 on success, 0 on error
75 static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm,
76 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl)
80 if (crm == NULL || crm->certReq == NULL || ctrl == NULL) {
81 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, CRMF_R_NULL_ARGUMENT);
85 if (crm->certReq->controls == NULL) {
86 crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
87 if (crm->certReq->controls == NULL)
91 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl))
97 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls);
98 crm->certReq->controls = NULL;
103 /* id-regCtrl-regToken Control (section 6.1) */
104 IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl)
106 /* id-regCtrl-authenticator Control (section 6.2) */
107 #define ASN1_UTF8STRING_dup ASN1_STRING_dup
108 IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl)
110 int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi,
111 int method, GENERAL_NAME *nm)
114 || method < OSSL_CRMF_PUB_METHOD_DONTCARE
115 || method > OSSL_CRMF_PUB_METHOD_LDAP) {
116 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO,
117 ERR_R_PASSED_INVALID_ARGUMENT);
121 if (!ASN1_INTEGER_set(spi->pubMethod, method))
123 GENERAL_NAME_free(spi->pubLocation);
124 spi->pubLocation = nm;
129 OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(OSSL_CRMF_PKIPUBLICATIONINFO *pi,
130 OSSL_CRMF_SINGLEPUBINFO *spi)
132 if (pi == NULL || spi == NULL) {
133 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO,
134 CRMF_R_NULL_ARGUMENT);
137 if (pi->pubInfos == NULL)
138 pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null();
139 if (pi->pubInfos == NULL)
142 return sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi);
145 int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(OSSL_CRMF_PKIPUBLICATIONINFO *pi,
149 || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH
150 || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) {
151 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION,
152 ERR_R_PASSED_INVALID_ARGUMENT);
156 return ASN1_INTEGER_set(pi->action, action);
159 /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */
160 IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO,
163 /* id-regCtrl-oldCertID Control (section 6.5) from the given */
164 IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl)
166 OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer,
167 const ASN1_INTEGER *serial)
169 OSSL_CRMF_CERTID *cid = NULL;
171 if (issuer == NULL || serial == NULL) {
172 CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, CRMF_R_NULL_ARGUMENT);
176 if ((cid = OSSL_CRMF_CERTID_new()) == NULL)
179 if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer))
181 cid->issuer->type = GEN_DIRNAME;
183 ASN1_INTEGER_free(cid->serialNumber);
184 if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
190 OSSL_CRMF_CERTID_free(cid);
195 * id-regCtrl-protocolEncrKey Control (section 6.6)
197 IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl)
200 * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack.
202 * returns 1 on success, 0 on error
204 static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm,
205 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri)
207 STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL;
209 if (crm == NULL || ri == NULL) {
210 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT);
214 if (crm->regInfo == NULL)
215 crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
216 if (crm->regInfo == NULL)
218 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri))
225 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info);
229 /* id-regInfo-utf8Pairs to regInfo (section 7.1) */
230 IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo)
232 /* id-regInfo-certReq to regInfo (section 7.2) */
233 IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo)
236 /* retrieves the certificate template of crm */
237 OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm)
239 if (crm == NULL || crm->certReq == NULL) {
240 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT);
243 return crm->certReq->certTemplate;
247 int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to)
249 OSSL_CRMF_OPTIONALVALIDITY *vld = NULL;
250 ASN1_TIME *from_asn = NULL;
251 ASN1_TIME *to_asn = NULL;
252 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
254 if (tmpl == NULL) { /* also crm == NULL implies this */
255 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT);
259 if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL))
261 if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL))
263 if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL)
266 vld->notBefore = from_asn;
267 vld->notAfter = to_asn;
269 tmpl->validity = vld;
273 ASN1_TIME_free(from_asn);
274 ASN1_TIME_free(to_asn);
279 int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid)
281 if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) {
282 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT);
286 return ASN1_INTEGER_set(crm->certReq->certReqId, rid);
289 /* get ASN.1 encoded integer, return -1 on error */
290 static int crmf_asn1_get_int(const ASN1_INTEGER *a)
294 if (!ASN1_INTEGER_get_int64(&res, a)) {
295 CRMFerr(0, ASN1_R_INVALID_NUMBER);
299 CRMFerr(0, ASN1_R_TOO_SMALL);
303 CRMFerr(0, ASN1_R_TOO_LARGE);
309 int OSSL_CRMF_MSG_get_certReqId(const OSSL_CRMF_MSG *crm)
311 if (crm == NULL || /* not really needed: */ crm->certReq == NULL) {
312 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT);
315 return crmf_asn1_get_int(crm->certReq->certReqId);
319 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm,
320 X509_EXTENSIONS *exts)
322 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
324 if (tmpl == NULL) { /* also crm == NULL implies this */
325 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT);
329 if (sk_X509_EXTENSION_num(exts) == 0) {
330 sk_X509_EXTENSION_free(exts);
331 exts = NULL; /* do not include empty extensions list */
334 sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free);
335 tmpl->extensions = exts;
340 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm,
344 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
346 if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */
347 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT);
351 if (tmpl->extensions == NULL) {
352 if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL)
357 if (!sk_X509_EXTENSION_push(tmpl->extensions, ext))
362 sk_X509_EXTENSION_free(tmpl->extensions);
363 tmpl->extensions = NULL;
368 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
369 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps,
370 OSSL_CRMF_CERTREQUEST *cr,
371 EVP_PKEY *pkey, int dgst)
374 EVP_MD *fetched_md = NULL;
375 const EVP_MD *md = EVP_get_digestbynid(dgst);
377 if (ps == NULL || cr == NULL || pkey == NULL) {
378 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT);
382 /* If we didn't find legacy MD, we try an implicit fetch */
384 md = fetched_md = EVP_MD_fetch(NULL, OBJ_nid2sn(dgst), NULL);
387 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
388 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
392 ret = ASN1_item_sign(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
393 ps->algorithmIdentifier, NULL, ps->signature,
396 EVP_MD_free(fetched_md);
401 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey,
404 OSSL_CRMF_POPO *pp = NULL;
405 ASN1_INTEGER *tag = NULL;
407 if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) {
408 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT);
412 if (ppmtd == OSSL_CRMF_POPO_NONE)
414 if ((pp = OSSL_CRMF_POPO_new()) == NULL)
419 case OSSL_CRMF_POPO_RAVERIFIED:
420 if ((pp->value.raVerified = ASN1_NULL_new()) == NULL)
424 case OSSL_CRMF_POPO_SIGNATURE:
426 OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new();
428 || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)) {
429 OSSL_CRMF_POPOSIGNINGKEY_free(ps);
432 pp->value.signature = ps;
436 case OSSL_CRMF_POPO_KEYENC:
437 if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL)
439 tag = ASN1_INTEGER_new();
440 pp->value.keyEncipherment->type =
441 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE;
442 pp->value.keyEncipherment->value.subsequentMessage = tag;
444 || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT))
449 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO,
450 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO);
455 OSSL_CRMF_POPO_free(crm->popo);
460 OSSL_CRMF_POPO_free(pp);
464 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
465 static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b)
467 X509_ALGOR *algA = NULL, *algB = NULL;
472 if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a)
475 if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b)
478 if ((res = X509_ALGOR_cmp(algA, algB)) != 0)
480 return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b));
483 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
484 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs,
485 int rid, int acceptRAVerified)
487 OSSL_CRMF_MSG *req = NULL;
488 X509_PUBKEY *pubkey = NULL;
489 OSSL_CRMF_POPOSIGNINGKEY *sig = NULL;
491 if (reqs == NULL || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL) {
492 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, CRMF_R_NULL_ARGUMENT);
496 if (req->popo == NULL) {
497 CRMFerr(0, CRMF_R_POPO_MISSING);
501 switch (req->popo->type) {
502 case OSSL_CRMF_POPO_RAVERIFIED:
503 if (!acceptRAVerified) {
504 CRMFerr(0, CRMF_R_POPO_RAVERIFIED_NOT_ACCEPTED);
508 case OSSL_CRMF_POPO_SIGNATURE:
509 pubkey = req->certReq->certTemplate->publicKey;
510 if (pubkey == NULL) {
511 CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY);
514 sig = req->popo->value.signature;
515 if (sig->poposkInput != NULL) {
517 * According to RFC 4211: publicKey contains a copy of
518 * the public key from the certificate template. This MUST be
519 * exactly the same value as contained in the certificate template.
521 if (sig->poposkInput->publicKey == NULL) {
522 CRMFerr(0, CRMF_R_POPO_MISSING_PUBLIC_KEY);
525 if (X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey) != 0) {
526 CRMFerr(0, CRMF_R_POPO_INCONSISTENT_PUBLIC_KEY);
530 * TODO check the contents of the authInfo sub-field,
531 * see RFC 4211 https://tools.ietf.org/html/rfc4211#section-4.1
533 if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT),
534 sig->algorithmIdentifier, sig->signature,
536 X509_PUBKEY_get0(pubkey)) < 1)
539 if (req->certReq->certTemplate->subject == NULL) {
540 CRMFerr(0, CRMF_R_POPO_MISSING_SUBJECT);
543 if (ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
544 sig->algorithmIdentifier, sig->signature,
545 req->certReq, X509_PUBKEY_get0(pubkey)) < 1)
549 case OSSL_CRMF_POPO_KEYENC:
551 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
552 * return 1 if the type of req->popo->value.keyEncipherment
553 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
554 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
556 case OSSL_CRMF_POPO_KEYAGREE:
558 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
559 CRMF_R_UNSUPPORTED_POPO_METHOD);
565 /* retrieves the serialNumber of the given cert template or NULL on error */
567 *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(const OSSL_CRMF_CERTTEMPLATE *tmpl)
569 return tmpl != NULL ? tmpl->serialNumber : NULL;
572 /* retrieves the issuer name of the given cert template or NULL on error */
574 *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl)
576 return tmpl != NULL ? tmpl->issuer : NULL;
579 /* retrieves the issuer name of the given CertId or NULL on error */
580 const X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid)
582 return cid != NULL && cid->issuer->type == GEN_DIRNAME ?
583 cid->issuer->d.directoryName : NULL;
586 /* retrieves the serialNumber of the given CertId or NULL on error */
587 ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid)
589 return cid != NULL ? cid->serialNumber : NULL;
593 * fill in certificate template.
594 * Any value argument that is NULL will leave the respective field unchanged.
596 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl,
598 const X509_NAME *subject,
599 const X509_NAME *issuer,
600 const ASN1_INTEGER *serial)
603 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT);
606 if (subject != NULL && !X509_NAME_set((X509_NAME **)&tmpl->subject, subject))
608 if (issuer != NULL && !X509_NAME_set((X509_NAME **)&tmpl->issuer, issuer))
610 if (serial != NULL) {
611 ASN1_INTEGER_free(tmpl->serialNumber);
612 if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
615 if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey))
622 * Decrypts the certificate in the given encryptedValue using private key pkey.
623 * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2.
625 * returns a pointer to the decrypted certificate
626 * returns NULL on error or if no certificate available
628 X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(const OSSL_CRMF_ENCRYPTEDVALUE *ecert,
631 X509 *cert = NULL; /* decrypted certificate */
632 EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */
633 unsigned char *ek = NULL; /* decrypted symmetric encryption key */
634 size_t eksize = 0; /* size of decrypted symmetric encryption key */
635 const EVP_CIPHER *cipher = NULL; /* used cipher */
636 int cikeysize = 0; /* key size from cipher */
637 unsigned char *iv = NULL; /* initial vector for symmetric encryption */
638 unsigned char *outbuf = NULL; /* decryption output buffer */
639 const unsigned char *p = NULL; /* needed for decoding ASN1 */
640 int symmAlg = 0; /* NIDs for symmetric algorithm */
642 EVP_PKEY_CTX *pkctx = NULL; /* private key context */
644 if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL
645 || ecert->encValue == NULL || pkey == NULL) {
646 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
647 CRMF_R_NULL_ARGUMENT);
650 if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) {
651 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
652 CRMF_R_UNSUPPORTED_CIPHER);
655 /* select symmetric cipher based on algorithm given in message */
656 if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) {
657 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
658 CRMF_R_UNSUPPORTED_CIPHER);
661 cikeysize = EVP_CIPHER_key_length(cipher);
662 /* first the symmetric key needs to be decrypted */
663 pkctx = EVP_PKEY_CTX_new(pkey, NULL);
664 if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) {
665 ASN1_BIT_STRING *encKey = ecert->encSymmKey;
669 if (EVP_PKEY_decrypt(pkctx, NULL, &eksize,
670 encKey->data, encKey->length) <= 0
671 || (ek = OPENSSL_malloc(eksize)) == NULL)
673 retval = EVP_PKEY_decrypt(pkctx, ek, &eksize,
674 encKey->data, encKey->length);
675 ERR_clear_error(); /* error state may have sensitive information */
676 failure = ~constant_time_is_zero_s(constant_time_msb(retval)
677 | constant_time_is_zero(retval));
678 failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize);
680 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
681 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY);
687 if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL)
689 if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv,
690 EVP_CIPHER_iv_length(cipher))
691 != EVP_CIPHER_iv_length(cipher)) {
692 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
693 CRMF_R_MALFORMED_IV);
698 * d2i_X509 changes the given pointer, so use p for decoding the message and
699 * keep the original pointer in outbuf so the memory can be freed later
701 if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length +
702 EVP_CIPHER_block_size(cipher))) == NULL
703 || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL)
705 EVP_CIPHER_CTX_set_padding(evp_ctx, 0);
707 if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv)
708 || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen,
709 ecert->encValue->data,
710 ecert->encValue->length)
711 || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) {
712 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
713 CRMF_R_ERROR_DECRYPTING_CERTIFICATE);
718 /* convert decrypted certificate from DER to internal ASN.1 structure */
719 if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) {
720 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
721 CRMF_R_ERROR_DECODING_CERTIFICATE);
724 EVP_PKEY_CTX_free(pkctx);
725 OPENSSL_free(outbuf);
726 EVP_CIPHER_CTX_free(evp_ctx);
727 OPENSSL_clear_free(ek, eksize);