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
);