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(int func, const ASN1_INTEGER *a)
306 if (!ASN1_INTEGER_get_int64(&res, a)) {
307 CRMFerr(func, ASN1_R_INVALID_NUMBER);
311 CRMFerr(func, ASN1_R_TOO_SMALL);
315 CRMFerr(func, 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(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID,
328 crm->certReq->certReqId);
332 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm,
333 X509_EXTENSIONS *exts)
335 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
337 if (tmpl == NULL) { /* also crm == NULL implies this */
338 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, CRMF_R_NULL_ARGUMENT);
342 if (sk_X509_EXTENSION_num(exts) == 0) {
343 sk_X509_EXTENSION_free(exts);
344 exts = NULL; /* do not include empty extensions list */
347 sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free);
348 tmpl->extensions = exts;
353 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm,
354 const X509_EXTENSION *ext)
357 OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm);
359 if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */
360 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, CRMF_R_NULL_ARGUMENT);
364 if (tmpl->extensions == NULL) {
365 if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL)
370 if (!sk_X509_EXTENSION_push(tmpl->extensions, (X509_EXTENSION *)ext))
374 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, ERR_R_MALLOC_FAILURE);
377 sk_X509_EXTENSION_free(tmpl->extensions);
378 tmpl->extensions = NULL;
383 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
384 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps,
385 OSSL_CRMF_CERTREQUEST *cr,
386 EVP_PKEY *pkey, int dgst)
391 unsigned char *crder = NULL, *sig = NULL;
394 const EVP_MD *alg = NULL;
395 EVP_MD_CTX *ctx = NULL;
398 if (ps == NULL || cr == NULL || pkey == NULL) {
399 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT);
403 /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */
404 ps->signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07);
405 ps->signature->flags |= ASN1_STRING_FLAG_BITS_LEFT;
407 len = i2d_OSSL_CRMF_CERTREQUEST(cr, &crder);
408 if (len < 0 || crder == NULL) {
409 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
414 if (!OBJ_find_sigid_by_algs(&alg_nid, dgst, EVP_PKEY_id(pkey))) {
415 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
416 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
419 if (!OBJ_find_sigid_algs(alg_nid, &md_nid, NULL)
420 || (alg = EVP_get_digestbynid(md_nid)) == NULL) {
421 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT,
422 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY);
425 if (!X509_ALGOR_set0(ps->algorithmIdentifier, OBJ_nid2obj(alg_nid),
427 || (ctx = EVP_MD_CTX_new()) == NULL
428 || EVP_DigestSignInit(ctx, NULL, alg, NULL, pkey) <= 0
429 || EVP_DigestSignUpdate(ctx, crder, crlen) <= 0
430 || EVP_DigestSignFinal(ctx, NULL, &siglen) <= 0) {
431 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
434 if ((sig = OPENSSL_malloc(siglen)) == NULL) {
435 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, ERR_R_MALLOC_FAILURE);
438 if (EVP_DigestSignFinal(ctx, sig, &siglen) <= 0
439 || !ASN1_BIT_STRING_set(ps->signature, sig, siglen)) {
440 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR);
447 EVP_MD_CTX_free(ctx);
453 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey,
456 OSSL_CRMF_POPO *pp = NULL;
457 ASN1_INTEGER *tag = NULL;
459 if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) {
460 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT);
464 if (ppmtd == OSSL_CRMF_POPO_NONE)
466 if ((pp = OSSL_CRMF_POPO_new()) == NULL)
471 case OSSL_CRMF_POPO_RAVERIFIED:
472 if ((pp->value.raVerified = ASN1_NULL_new()) == NULL)
476 case OSSL_CRMF_POPO_SIGNATURE:
478 OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new();
480 || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)){
481 OSSL_CRMF_POPOSIGNINGKEY_free(ps);
484 pp->value.signature = ps;
488 case OSSL_CRMF_POPO_KEYENC:
489 if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL)
491 tag = ASN1_INTEGER_new();
492 pp->value.keyEncipherment->type =
493 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE;
494 pp->value.keyEncipherment->value.subsequentMessage = tag;
496 || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT))
501 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO,
502 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO);
507 OSSL_CRMF_POPO_free(crm->popo);
512 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, ERR_R_MALLOC_FAILURE);
514 OSSL_CRMF_POPO_free(pp);
518 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
519 static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b)
521 X509_ALGOR *algA = NULL, *algB = NULL;
526 if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a)
529 if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b)
532 if ((res = X509_ALGOR_cmp(algA, algB)) != 0)
534 return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b));
537 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
538 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs,
539 int rid, int acceptRAVerified)
541 OSSL_CRMF_MSG *req = NULL;
542 X509_PUBKEY *pubkey = NULL;
543 OSSL_CRMF_POPOSIGNINGKEY *sig = NULL;
546 || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL
547 || req->popo == NULL) {
548 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
549 CRMF_R_NULL_ARGUMENT);
553 switch (req->popo->type) {
554 case OSSL_CRMF_POPO_RAVERIFIED:
555 if (acceptRAVerified)
558 case OSSL_CRMF_POPO_SIGNATURE:
559 pubkey = req->certReq->certTemplate->publicKey;
560 sig = req->popo->value.signature;
561 if (sig->poposkInput != NULL) {
563 * According to RFC 4211: publicKey contains a copy of
564 * the public key from the certificate template. This MUST be
565 * exactly the same value as contained in the certificate template.
568 || sig->poposkInput->publicKey == NULL
569 || X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey)
571 ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT),
572 sig->algorithmIdentifier, sig->signature,
573 sig->poposkInput, X509_PUBKEY_get0(pubkey)) < 1)
577 || req->certReq->certTemplate->subject == NULL
578 || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST),
579 sig->algorithmIdentifier, sig->signature,
581 X509_PUBKEY_get0(pubkey)) < 1)
585 case OSSL_CRMF_POPO_KEYENC:
587 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
588 * return 1 if the type of req->popo->value.keyEncipherment
589 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
590 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
592 case OSSL_CRMF_POPO_KEYAGREE:
594 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
595 CRMF_R_UNSUPPORTED_POPO_METHOD);
598 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO,
599 CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED);
603 /* retrieves the serialNumber of the given cert template or NULL on error */
604 ASN1_INTEGER *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE *tmpl)
606 return tmpl != NULL ? tmpl->serialNumber : NULL;
609 /* retrieves the issuer name of the given cert template or NULL on error */
610 X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE *tmpl)
612 return tmpl != NULL ? tmpl->issuer : NULL;
616 * fill in certificate template.
617 * Any value argument that is NULL will leave the respective field unchanged.
619 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl,
621 const X509_NAME *subject,
622 const X509_NAME *issuer,
623 const ASN1_INTEGER *serial)
626 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT);
629 if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject))
631 if (issuer != NULL && !X509_NAME_set(&tmpl->issuer, issuer))
633 if (serial != NULL) {
634 ASN1_INTEGER_free(tmpl->serialNumber);
635 if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL)
638 if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey))
643 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, ERR_R_MALLOC_FAILURE);
649 * Decrypts the certificate in the given encryptedValue
650 * this is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2
652 * returns a pointer to the decrypted certificate
653 * returns NULL on error or if no certificate available
655 X509 *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(OSSL_CRMF_ENCRYPTEDVALUE *ecert,
658 X509 *cert = NULL; /* decrypted certificate */
659 EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */
660 unsigned char *ek = NULL; /* decrypted symmetric encryption key */
661 const EVP_CIPHER *cipher = NULL; /* used cipher */
662 unsigned char *iv = NULL; /* initial vector for symmetric encryption */
663 unsigned char *outbuf = NULL; /* decryption output buffer */
664 const unsigned char *p = NULL; /* needed for decoding ASN1 */
665 int symmAlg = 0; /* NIDs for symmetric algorithm */
667 EVP_PKEY_CTX *pkctx = NULL; /* private key context */
669 if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL
670 || ecert->encValue == NULL || pkey == NULL) {
671 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
672 CRMF_R_NULL_ARGUMENT);
675 if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) {
676 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
677 CRMF_R_UNSUPPORTED_CIPHER);
681 /* first the symmetric key needs to be decrypted */
682 pkctx = EVP_PKEY_CTX_new(pkey, NULL);
683 if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) {
684 ASN1_BIT_STRING *encKey = ecert->encSymmKey;
687 if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, encKey->data, encKey->length)
689 || (ek = OPENSSL_malloc(eksize)) == NULL
690 || EVP_PKEY_decrypt(pkctx, ek, &eksize, encKey->data,
691 encKey->length) <= 0) {
692 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
693 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY);
700 /* select symmetric cipher based on algorithm given in message */
701 if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) {
702 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
703 CRMF_R_UNSUPPORTED_CIPHER);
706 if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL)
708 if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv,
709 EVP_CIPHER_iv_length(cipher))
710 != EVP_CIPHER_iv_length(cipher)) {
711 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
712 CRMF_R_MALFORMED_IV);
717 * d2i_X509 changes the given pointer, so use p for decoding the message and
718 * keep the original pointer in outbuf so the memory can be freed later
720 if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length +
721 EVP_CIPHER_block_size(cipher))) == NULL
722 || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL)
724 EVP_CIPHER_CTX_set_padding(evp_ctx, 0);
726 if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv)
727 || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen,
728 ecert->encValue->data,
729 ecert->encValue->length)
730 || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) {
731 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
732 CRMF_R_ERROR_DECRYPTING_CERTIFICATE);
737 /* convert decrypted certificate from DER to internal ASN.1 structure */
738 if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) {
739 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT,
740 CRMF_R_ERROR_DECODING_CERTIFICATE);
745 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, ERR_R_MALLOC_FAILURE);
747 EVP_PKEY_CTX_free(pkctx);
748 OPENSSL_free(outbuf);
749 EVP_CIPHER_CTX_free(evp_ctx);