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;
125 int OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(
126 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(
143 OSSL_CRMF_PKIPUBLICATIONINFO *pi, int action)
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)
195 IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl)
198 * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack.
200 * returns 1 on success, 0 on error
202 static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm,
203 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri)
205 STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL;
207 if (crm == NULL || ri == NULL) {
208 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT);
212 if (crm->regInfo == NULL)
213 crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
214 if (crm->regInfo == NULL)
216 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri))
223 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info);
227 /* id-regInfo-utf8Pairs to regInfo (section 7.1) */
228 IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo)
230 /* id-regInfo-certReq to regInfo (section 7.2) */
231 IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo)
234 /* retrieves the certificate template of crm */
235 OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm)
237 if (crm == NULL || crm->certReq == NULL) {
238 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT);
241 return crm->certReq->certTemplate;
245 int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to)
247 OSSL_CRMF_OPTIONALVALIDITY *vld = NULL;
248 ASN1_TIME *from_asn = NULL;
249 ASN1_TIME *to_asn = NULL;
250 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
252 if (tmpl == NULL) { /* also crm == NULL implies this */
253 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT);
257 if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL))
259 if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL))
261 if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL)
264 vld->notBefore = from_asn;
265 vld->notAfter = to_asn;
267 tmpl->validity = vld;
271 ASN1_TIME_free(from_asn);
272 ASN1_TIME_free(to_asn);
277 int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid)
279 if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) {
280 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT);
284 return ASN1_INTEGER_set(crm->certReq->certReqId, rid);
287 /* get ASN.1 encoded integer, return -1 on error */
288 static int crmf_asn1_get_int(const ASN1_INTEGER *a)
292 if (!ASN1_INTEGER_get_int64(&res, a)) {
293 CRMFerr(0, ASN1_R_INVALID_NUMBER);
297 CRMFerr(0, ASN1_R_TOO_SMALL);
301 CRMFerr(0, ASN1_R_TOO_LARGE);
307 int OSSL_CRMF_MSG_get_certReqId(OSSL_CRMF_MSG *crm)
309 if (crm == NULL || /* not really needed: */ crm->certReq == NULL) {
310 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT);
313 return crmf_asn1_get_int(crm->certReq->certReqId);
317 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm,
318 X509_EXTENSIONS *exts)
320 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
322 if (tmpl == NULL) { /* also crm == NULL implies this */
323 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT);
327 if (sk_X509_EXTENSION_num(exts) == 0) {
328 sk_X509_EXTENSION_free(exts);
329 exts = NULL; /* do not include empty extensions list */
332 sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free);
333 tmpl->extensions = exts;
338 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm,
342 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
344 if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */
345 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT);
349 if (tmpl->extensions == NULL) {
350 if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL)
355 if (!sk_X509_EXTENSION_push(tmpl->extensions, ext))
360 sk_X509_EXTENSION_free(tmpl->extensions);
361 tmpl->extensions = NULL;
366 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
367 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps,
368 OSSL_CRMF_CERTREQUEST *cr,
369 EVP_PKEY *pkey, int dgst)
374 unsigned char *crder = NULL, *sig = NULL;
377 const EVP_MD *alg = NULL;
378 EVP_MD_CTX *ctx = NULL;
381 if (ps == NULL || cr == NULL || pkey == NULL) {
382 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT);
386 /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */
387 ps->signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
388 ps->signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
390 len = i2d_OSSL_CRMF_CERTREQUEST(cr, &crder);
391 if (len < 0 || crder == NULL) {
392 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
397 if (!OBJ_find_sigid_by_algs(&alg_nid, dgst, EVP_PKEY_id(pkey))) {
398 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
399 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
402 if (!OBJ_find_sigid_algs(alg_nid, &md_nid, NULL)
403 || (alg = EVP_get_digestbynid(md_nid)) == NULL) {
404 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
405 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
408 if (!X509_ALGOR_set0(ps->algorithmIdentifier, OBJ_nid2obj(alg_nid),
410 || (ctx = EVP_MD_CTX_new()) == NULL
411 || EVP_DigestSignInit(ctx, NULL, alg, NULL, pkey) <= 0
412 || EVP_DigestSignUpdate(ctx, crder, crlen) <= 0
413 || EVP_DigestSignFinal(ctx, NULL, &siglen) <= 0) {
414 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
417 if ((sig = OPENSSL_malloc(siglen)) == NULL)
419 if (EVP_DigestSignFinal(ctx, sig, &siglen) <= 0
420 || !ASN1_BIT_STRING_set(ps->signature, sig, siglen)) {
421 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
428 EVP_MD_CTX_free(ctx);
434 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey,
437 OSSL_CRMF_POPO *pp = NULL;
438 ASN1_INTEGER *tag = NULL;
440 if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) {
441 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT);
445 if (ppmtd == OSSL_CRMF_POPO_NONE)
447 if ((pp = OSSL_CRMF_POPO_new()) == NULL)
452 case OSSL_CRMF_POPO_RAVERIFIED:
453 if ((pp->value.raVerified = ASN1_NULL_new()) == NULL)
457 case OSSL_CRMF_POPO_SIGNATURE:
459 OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new();
461 || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)){
462 OSSL_CRMF_POPOSIGNINGKEY_free(ps);
465 pp->value.signature = ps;
469 case OSSL_CRMF_POPO_KEYENC:
470 if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL)
472 tag = ASN1_INTEGER_new();
473 pp->value.keyEncipherment->type =
474 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE;
475 pp->value.keyEncipherment->value.subsequentMessage = tag;
477 || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT))
482 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO,
483 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO);
488 OSSL_CRMF_POPO_free(crm->popo);
493 OSSL_CRMF_POPO_free(pp);
497 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
498 static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b)
500 X509_ALGOR *algA = NULL, *algB = NULL;
505 if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a)
508 if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b)
511 if ((res = X509_ALGOR_cmp(algA, algB)) != 0)
513 return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b));
516 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
517 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs,
518 int rid, int acceptRAVerified)
520 OSSL_CRMF_MSG *req = NULL;
521 X509_PUBKEY *pubkey = NULL;
522 OSSL_CRMF_POPOSIGNINGKEY *sig = NULL;
525 || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL
526 || req->popo == NULL) {
527 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
528 CRMF_R_NULL_ARGUMENT);
532 switch (req->popo->type) {
533 case OSSL_CRMF_POPO_RAVERIFIED:
534 if (acceptRAVerified)
537 case OSSL_CRMF_POPO_SIGNATURE:
538 pubkey = req->certReq->certTemplate->publicKey;
539 sig = req->popo->value.signature;
540 if (sig->poposkInput != NULL) {
542 * According to RFC 4211: publicKey contains a copy of
543 * the public key from the certificate template. This MUST be
544 * exactly the same value as contained in the certificate template.
547 || sig->poposkInput->publicKey == NULL
548 || X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey)
550 ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT),
551 sig->algorithmIdentifier, sig->signature,
552 sig->poposkInput, X509_PUBKEY_get0(pubkey)) < 1)
556 || req->certReq->certTemplate->subject == NULL
557 || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
558 sig->algorithmIdentifier, sig->signature,
560 X509_PUBKEY_get0(pubkey)) < 1)
564 case OSSL_CRMF_POPO_KEYENC:
566 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
567 * return 1 if the type of req->popo->value.keyEncipherment
568 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
569 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
571 case OSSL_CRMF_POPO_KEYAGREE:
573 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
574 CRMF_R_UNSUPPORTED_POPO_METHOD);
577 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
578 CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED);
582 /* retrieves the serialNumber of the given cert template or NULL on error */
583 ASN1_INTEGER *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE *tmpl)
585 return tmpl != NULL ? tmpl->serialNumber : NULL;
588 /* retrieves the issuer name of the given cert template or NULL on error */
589 X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE *tmpl)
591 return tmpl != NULL ? tmpl->issuer : NULL;
594 /* retrieves the issuer name of the given CertId or NULL on error */
595 X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid)
597 return cid != NULL && cid->issuer->type == GEN_DIRNAME ?
598 cid->issuer->d.directoryName : NULL;
601 /* retrieves the serialNumber of the given CertId or NULL on error */
602 ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid)
604 return cid != NULL ? cid->serialNumber : NULL;
608 * fill in certificate template.
609 * Any value argument that is NULL will leave the respective field unchanged.
611 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl,
613 const X509_NAME *subject,
614 const X509_NAME *issuer,
615 const ASN1_INTEGER *serial)
618 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT);
621 if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject))
623 if (issuer != NULL && !X509_NAME_set(&tmpl->issuer, issuer))
625 if (serial != NULL) {
626 ASN1_INTEGER_free(tmpl->serialNumber);
627 if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
630 if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey))
637 * Decrypts the certificate in the given encryptedValue using private key pkey.
638 * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2.
640 * returns a pointer to the decrypted certificate
641 * returns NULL on error or if no certificate available
643 X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(OSSL_CRMF_ENCRYPTEDVALUE *ecert,
646 X509 *cert = NULL; /* decrypted certificate */
647 EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */
648 unsigned char *ek = NULL; /* decrypted symmetric encryption key */
649 size_t eksize = 0; /* size of decrypted symmetric encryption key */
650 const EVP_CIPHER *cipher = NULL; /* used cipher */
651 int cikeysize = 0; /* key size from cipher */
652 unsigned char *iv = NULL; /* initial vector for symmetric encryption */
653 unsigned char *outbuf = NULL; /* decryption output buffer */
654 const unsigned char *p = NULL; /* needed for decoding ASN1 */
655 int symmAlg = 0; /* NIDs for symmetric algorithm */
657 EVP_PKEY_CTX *pkctx = NULL; /* private key context */
659 if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL
660 || ecert->encValue == NULL || pkey == NULL) {
661 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
662 CRMF_R_NULL_ARGUMENT);
665 if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) {
666 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
667 CRMF_R_UNSUPPORTED_CIPHER);
670 /* select symmetric cipher based on algorithm given in message */
671 if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) {
672 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
673 CRMF_R_UNSUPPORTED_CIPHER);
676 cikeysize = EVP_CIPHER_key_length(cipher);
677 /* first the symmetric key needs to be decrypted */
678 pkctx = EVP_PKEY_CTX_new(pkey, NULL);
679 if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) {
680 ASN1_BIT_STRING *encKey = ecert->encSymmKey;
684 if (EVP_PKEY_decrypt(pkctx, NULL, &eksize,
685 encKey->data, encKey->length) <= 0
686 || (ek = OPENSSL_malloc(eksize)) == NULL)
688 retval = EVP_PKEY_decrypt(pkctx, ek, &eksize,
689 encKey->data, encKey->length);
690 ERR_clear_error(); /* error state may have sensitive information */
691 failure = ~constant_time_is_zero_s(constant_time_msb(retval)
692 | constant_time_is_zero(retval));
693 failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize);
695 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
696 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY);
702 if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL)
704 if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv,
705 EVP_CIPHER_iv_length(cipher))
706 != EVP_CIPHER_iv_length(cipher)) {
707 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
708 CRMF_R_MALFORMED_IV);
713 * d2i_X509 changes the given pointer, so use p for decoding the message and
714 * keep the original pointer in outbuf so the memory can be freed later
716 if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length +
717 EVP_CIPHER_block_size(cipher))) == NULL
718 || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL)
720 EVP_CIPHER_CTX_set_padding(evp_ctx, 0);
722 if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv)
723 || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen,
724 ecert->encValue->data,
725 ecert->encValue->length)
726 || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) {
727 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
728 CRMF_R_ERROR_DECRYPTING_CERTIFICATE);
733 /* convert decrypted certificate from DER to internal ASN.1 structure */
734 if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) {
735 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
736 CRMF_R_ERROR_DECODING_CERTIFICATE);
739 EVP_PKEY_CTX_free(pkctx);
740 OPENSSL_free(outbuf);
741 EVP_CIPHER_CTX_free(evp_ctx);
742 OPENSSL_clear_free(ek, eksize);