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>
33 /* explicit #includes not strictly needed since implied by the above: */
34 #include <openssl/crmf.h>
35 #include <openssl/err.h>
36 #include <openssl/evp.h>
39 * atyp = Attribute Type
41 * ctrlinf = "regCtrl" or "regInfo"
43 #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \
44 int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, \
47 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \
49 if (msg == NULL || in == NULL) \
51 if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \
53 if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \
55 if ((atav->value.atyp = valt##_dup(in)) == NULL) \
57 if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \
61 OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \
67 * Pushes the given control attribute into the controls stack of a CertRequest
69 * returns 1 on success, 0 on error
71 static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm,
72 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl)
76 if (crm == NULL || crm->certReq == NULL || ctrl == NULL) {
77 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, CRMF_R_NULL_ARGUMENT);
81 if (crm->certReq->controls == NULL) {
82 crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
83 if (crm->certReq->controls == NULL)
87 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl))
92 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, ERR_R_MALLOC_FAILURE);
95 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls);
96 crm->certReq->controls = NULL;
101 /* id-regCtrl-regToken Control (section 6.1) */
102 IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl)
104 /* id-regCtrl-authenticator Control (section 6.2) */
105 #define ASN1_UTF8STRING_dup ASN1_STRING_dup
106 IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl)
108 int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi,
109 int method, GENERAL_NAME *nm)
112 || method < OSSL_CRMF_PUB_METHOD_DONTCARE
113 || method > OSSL_CRMF_PUB_METHOD_LDAP) {
114 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO,
115 ERR_R_PASSED_INVALID_ARGUMENT);
119 if (!ASN1_INTEGER_set(spi->pubMethod, method))
121 GENERAL_NAME_free(spi->pubLocation);
122 spi->pubLocation = nm;
126 int OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(
127 OSSL_CRMF_PKIPUBLICATIONINFO *pi,
128 OSSL_CRMF_SINGLEPUBINFO *spi)
130 if (pi == NULL || spi == NULL) {
131 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO,
132 CRMF_R_NULL_ARGUMENT);
135 if (pi->pubInfos == NULL)
136 pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null();
137 if (pi->pubInfos == NULL)
140 if (!sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi))
145 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO,
146 ERR_R_MALLOC_FAILURE);
150 int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(
151 OSSL_CRMF_PKIPUBLICATIONINFO *pi, int action)
154 || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH
155 || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) {
156 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION,
157 ERR_R_PASSED_INVALID_ARGUMENT);
161 return ASN1_INTEGER_set(pi->action, action);
164 /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */
165 IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO,
168 /* id-regCtrl-oldCertID Control (section 6.5) from the given */
169 IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl)
171 OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer,
172 const ASN1_INTEGER *serial)
174 OSSL_CRMF_CERTID *cid = NULL;
176 if (issuer == NULL || serial == NULL) {
177 CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, CRMF_R_NULL_ARGUMENT);
181 if ((cid = OSSL_CRMF_CERTID_new()) == NULL)
184 if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer))
186 cid->issuer->type = GEN_DIRNAME;
188 ASN1_INTEGER_free(cid->serialNumber);
189 if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
195 CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, ERR_R_MALLOC_FAILURE);
196 OSSL_CRMF_CERTID_free(cid);
201 * id-regCtrl-protocolEncrKey Control (section 6.6)
203 * For some reason X509_PUBKEY_dup() is not implemented in OpenSSL X509
204 * TODO: check whether that should go elsewhere
206 static IMPLEMENT_ASN1_DUP_FUNCTION(X509_PUBKEY)
207 IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl)
210 * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack.
212 * returns 1 on success, 0 on error
214 static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm,
215 OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri)
217 STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL;
219 if (crm == NULL || ri == NULL) {
220 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, CRMF_R_NULL_ARGUMENT);
224 if (crm->regInfo == NULL)
225 crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
226 if (crm->regInfo == NULL)
228 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri))
233 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, ERR_R_MALLOC_FAILURE);
236 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info);
240 /* id-regInfo-utf8Pairs to regInfo (section 7.1) */
241 IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo)
243 /* id-regInfo-certReq to regInfo (section 7.2) */
244 IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo)
247 /* retrieves the certificate template of crm */
248 OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm)
250 if (crm == NULL || crm->certReq == NULL) {
251 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT);
254 return crm->certReq->certTemplate;
258 int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to)
260 OSSL_CRMF_OPTIONALVALIDITY *vld = NULL;
261 ASN1_TIME *from_asn = NULL;
262 ASN1_TIME *to_asn = NULL;
263 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
265 if (tmpl == NULL) { /* also crm == NULL implies this */
266 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT);
270 if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL))
272 if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL))
274 if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL)
277 vld->notBefore = from_asn;
278 vld->notAfter = to_asn;
280 tmpl->validity = vld;
284 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, ERR_R_MALLOC_FAILURE);
285 ASN1_TIME_free(from_asn);
286 ASN1_TIME_free(to_asn);
291 int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid)
293 if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) {
294 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, CRMF_R_NULL_ARGUMENT);
298 return ASN1_INTEGER_set(crm->certReq->certReqId, rid);
301 /* get ASN.1 encoded integer, return -1 on error */
302 static int crmf_asn1_get_int(const ASN1_INTEGER *a)
306 if (!ASN1_INTEGER_get_int64(&res, a)) {
307 CRMFerr(0, ASN1_R_INVALID_NUMBER);
311 CRMFerr(0, ASN1_R_TOO_SMALL);
315 CRMFerr(0, ASN1_R_TOO_LARGE);
321 int OSSL_CRMF_MSG_get_certReqId(OSSL_CRMF_MSG *crm)
323 if (crm == NULL || /* not really needed: */ crm->certReq == NULL) {
324 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, CRMF_R_NULL_ARGUMENT);
327 return crmf_asn1_get_int(crm->certReq->certReqId);
331 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm,
332 X509_EXTENSIONS *exts)
334 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
336 if (tmpl == NULL) { /* also crm == NULL implies this */
337 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT);
341 if (sk_X509_EXTENSION_num(exts) == 0) {
342 sk_X509_EXTENSION_free(exts);
343 exts = NULL; /* do not include empty extensions list */
346 sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free);
347 tmpl->extensions = exts;
352 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm,
353 const X509_EXTENSION *ext)
356 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
358 if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */
359 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT);
363 if (tmpl->extensions == NULL) {
364 if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL)
369 if (!sk_X509_EXTENSION_push(tmpl->extensions, (X509_EXTENSION *)ext))
373 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, ERR_R_MALLOC_FAILURE);
376 sk_X509_EXTENSION_free(tmpl->extensions);
377 tmpl->extensions = NULL;
382 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
383 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps,
384 OSSL_CRMF_CERTREQUEST *cr,
385 EVP_PKEY *pkey, int dgst)
390 unsigned char *crder = NULL, *sig = NULL;
393 const EVP_MD *alg = NULL;
394 EVP_MD_CTX *ctx = NULL;
397 if (ps == NULL || cr == NULL || pkey == NULL) {
398 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT);
402 /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */
403 ps->signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
404 ps->signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
406 len = i2d_OSSL_CRMF_CERTREQUEST(cr, &crder);
407 if (len < 0 || crder == NULL) {
408 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
413 if (!OBJ_find_sigid_by_algs(&alg_nid, dgst, EVP_PKEY_id(pkey))) {
414 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
415 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
418 if (!OBJ_find_sigid_algs(alg_nid, &md_nid, NULL)
419 || (alg = EVP_get_digestbynid(md_nid)) == NULL) {
420 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
421 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
424 if (!X509_ALGOR_set0(ps->algorithmIdentifier, OBJ_nid2obj(alg_nid),
426 || (ctx = EVP_MD_CTX_new()) == NULL
427 || EVP_DigestSignInit(ctx, NULL, alg, NULL, pkey) <= 0
428 || EVP_DigestSignUpdate(ctx, crder, crlen) <= 0
429 || EVP_DigestSignFinal(ctx, NULL, &siglen) <= 0) {
430 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
433 if ((sig = OPENSSL_malloc(siglen)) == NULL) {
434 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, ERR_R_MALLOC_FAILURE);
437 if (EVP_DigestSignFinal(ctx, sig, &siglen) <= 0
438 || !ASN1_BIT_STRING_set(ps->signature, sig, siglen)) {
439 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
446 EVP_MD_CTX_free(ctx);
452 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey,
455 OSSL_CRMF_POPO *pp = NULL;
456 ASN1_INTEGER *tag = NULL;
458 if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) {
459 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT);
463 if (ppmtd == OSSL_CRMF_POPO_NONE)
465 if ((pp = OSSL_CRMF_POPO_new()) == NULL)
470 case OSSL_CRMF_POPO_RAVERIFIED:
471 if ((pp->value.raVerified = ASN1_NULL_new()) == NULL)
475 case OSSL_CRMF_POPO_SIGNATURE:
477 OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new();
479 || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)){
480 OSSL_CRMF_POPOSIGNINGKEY_free(ps);
483 pp->value.signature = ps;
487 case OSSL_CRMF_POPO_KEYENC:
488 if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL)
490 tag = ASN1_INTEGER_new();
491 pp->value.keyEncipherment->type =
492 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE;
493 pp->value.keyEncipherment->value.subsequentMessage = tag;
495 || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT))
500 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO,
501 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO);
506 OSSL_CRMF_POPO_free(crm->popo);
511 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, ERR_R_MALLOC_FAILURE);
513 OSSL_CRMF_POPO_free(pp);
517 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
518 static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b)
520 X509_ALGOR *algA = NULL, *algB = NULL;
525 if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a)
528 if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b)
531 if ((res = X509_ALGOR_cmp(algA, algB)) != 0)
533 return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b));
536 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
537 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs,
538 int rid, int acceptRAVerified)
540 OSSL_CRMF_MSG *req = NULL;
541 X509_PUBKEY *pubkey = NULL;
542 OSSL_CRMF_POPOSIGNINGKEY *sig = NULL;
545 || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL
546 || req->popo == NULL) {
547 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
548 CRMF_R_NULL_ARGUMENT);
552 switch (req->popo->type) {
553 case OSSL_CRMF_POPO_RAVERIFIED:
554 if (acceptRAVerified)
557 case OSSL_CRMF_POPO_SIGNATURE:
558 pubkey = req->certReq->certTemplate->publicKey;
559 sig = req->popo->value.signature;
560 if (sig->poposkInput != NULL) {
562 * According to RFC 4211: publicKey contains a copy of
563 * the public key from the certificate template. This MUST be
564 * exactly the same value as contained in the certificate template.
567 || sig->poposkInput->publicKey == NULL
568 || X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey)
570 ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT),
571 sig->algorithmIdentifier, sig->signature,
572 sig->poposkInput, X509_PUBKEY_get0(pubkey)) < 1)
576 || req->certReq->certTemplate->subject == NULL
577 || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
578 sig->algorithmIdentifier, sig->signature,
580 X509_PUBKEY_get0(pubkey)) < 1)
584 case OSSL_CRMF_POPO_KEYENC:
586 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
587 * return 1 if the type of req->popo->value.keyEncipherment
588 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
589 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
591 case OSSL_CRMF_POPO_KEYAGREE:
593 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
594 CRMF_R_UNSUPPORTED_POPO_METHOD);
597 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
598 CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED);
602 /* retrieves the serialNumber of the given cert template or NULL on error */
603 ASN1_INTEGER *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE *tmpl)
605 return tmpl != NULL ? tmpl->serialNumber : NULL;
608 /* retrieves the issuer name of the given cert template or NULL on error */
609 X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE *tmpl)
611 return tmpl != NULL ? tmpl->issuer : NULL;
615 * fill in certificate template.
616 * Any value argument that is NULL will leave the respective field unchanged.
618 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl,
620 const X509_NAME *subject,
621 const X509_NAME *issuer,
622 const ASN1_INTEGER *serial)
625 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT);
628 if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject))
630 if (issuer != NULL && !X509_NAME_set(&tmpl->issuer, issuer))
632 if (serial != NULL) {
633 ASN1_INTEGER_free(tmpl->serialNumber);
634 if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
637 if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey))
642 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, ERR_R_MALLOC_FAILURE);
648 * Decrypts the certificate in the given encryptedValue
649 * this is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2
651 * returns a pointer to the decrypted certificate
652 * returns NULL on error or if no certificate available
654 X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(OSSL_CRMF_ENCRYPTEDVALUE *ecert,
657 X509 *cert = NULL; /* decrypted certificate */
658 EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */
659 unsigned char *ek = NULL; /* decrypted symmetric encryption key */
660 const EVP_CIPHER *cipher = NULL; /* used cipher */
661 unsigned char *iv = NULL; /* initial vector for symmetric encryption */
662 unsigned char *outbuf = NULL; /* decryption output buffer */
663 const unsigned char *p = NULL; /* needed for decoding ASN1 */
664 int symmAlg = 0; /* NIDs for symmetric algorithm */
666 EVP_PKEY_CTX *pkctx = NULL; /* private key context */
668 if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL
669 || ecert->encValue == NULL || pkey == NULL) {
670 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
671 CRMF_R_NULL_ARGUMENT);
674 if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) {
675 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
676 CRMF_R_UNSUPPORTED_CIPHER);
680 /* first the symmetric key needs to be decrypted */
681 pkctx = EVP_PKEY_CTX_new(pkey, NULL);
682 if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) {
683 ASN1_BIT_STRING *encKey = ecert->encSymmKey;
686 if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, encKey->data, encKey->length)
688 || (ek = OPENSSL_malloc(eksize)) == NULL
689 || EVP_PKEY_decrypt(pkctx, ek, &eksize, encKey->data,
690 encKey->length) <= 0) {
691 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
692 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY);
699 /* select symmetric cipher based on algorithm given in message */
700 if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) {
701 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
702 CRMF_R_UNSUPPORTED_CIPHER);
705 if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL)
707 if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv,
708 EVP_CIPHER_iv_length(cipher))
709 != EVP_CIPHER_iv_length(cipher)) {
710 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
711 CRMF_R_MALFORMED_IV);
716 * d2i_X509 changes the given pointer, so use p for decoding the message and
717 * keep the original pointer in outbuf so the memory can be freed later
719 if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length +
720 EVP_CIPHER_block_size(cipher))) == NULL
721 || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL)
723 EVP_CIPHER_CTX_set_padding(evp_ctx, 0);
725 if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv)
726 || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen,
727 ecert->encValue->data,
728 ecert->encValue->length)
729 || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) {
730 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
731 CRMF_R_ERROR_DECRYPTING_CERTIFICATE);
736 /* convert decrypted certificate from DER to internal ASN.1 structure */
737 if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) {
738 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
739 CRMF_R_ERROR_DECODING_CERTIFICATE);
744 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, ERR_R_MALLOC_FAILURE);
746 EVP_PKEY_CTX_free(pkctx);
747 OPENSSL_free(outbuf);
748 EVP_CIPHER_CTX_free(evp_ctx);