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)
194 IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey
, X509_PUBKEY
, regCtrl
)
197 * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack.
199 * returns 1 on success, 0 on error
201 static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG
*crm
,
202 OSSL_CRMF_ATTRIBUTETYPEANDVALUE
*ri
)
204 STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE
) *info
= NULL
;
206 if (crm
== NULL
|| ri
== NULL
) {
207 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO
, CRMF_R_NULL_ARGUMENT
);
211 if (crm
->regInfo
== NULL
)
212 crm
->regInfo
= info
= sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null();
213 if (crm
->regInfo
== NULL
)
215 if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm
->regInfo
, ri
))
222 sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info
);
226 /* id-regInfo-utf8Pairs to regInfo (section 7.1) */
227 IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs
, ASN1_UTF8STRING
, regInfo
)
229 /* id-regInfo-certReq to regInfo (section 7.2) */
230 IMPLEMENT_CRMF_CTRL_FUNC(certReq
, OSSL_CRMF_CERTREQUEST
, regInfo
)
233 /* retrieves the certificate template of crm */
234 OSSL_CRMF_CERTTEMPLATE
*OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG
*crm
)
236 if (crm
== NULL
|| crm
->certReq
== NULL
) {
237 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL
, CRMF_R_NULL_ARGUMENT
);
240 return crm
->certReq
->certTemplate
;
244 int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG
*crm
, time_t from
, time_t to
)
246 OSSL_CRMF_OPTIONALVALIDITY
*vld
= NULL
;
247 ASN1_TIME
*from_asn
= NULL
;
248 ASN1_TIME
*to_asn
= NULL
;
249 OSSL_CRMF_CERTTEMPLATE
*tmpl
= OSSL_CRMF_MSG_get0_tmpl(crm
);
251 if (tmpl
== NULL
) { /* also crm == NULL implies this */
252 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY
, CRMF_R_NULL_ARGUMENT
);
256 if (from
!= 0 && ((from_asn
= ASN1_TIME_set(NULL
, from
)) == NULL
))
258 if (to
!= 0 && ((to_asn
= ASN1_TIME_set(NULL
, to
)) == NULL
))
260 if ((vld
= OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL
)
263 vld
->notBefore
= from_asn
;
264 vld
->notAfter
= to_asn
;
266 tmpl
->validity
= vld
;
270 ASN1_TIME_free(from_asn
);
271 ASN1_TIME_free(to_asn
);
276 int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG
*crm
, int rid
)
278 if (crm
== NULL
|| crm
->certReq
== NULL
|| crm
->certReq
->certReqId
== NULL
) {
279 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID
, CRMF_R_NULL_ARGUMENT
);
283 return ASN1_INTEGER_set(crm
->certReq
->certReqId
, rid
);
286 /* get ASN.1 encoded integer, return -1 on error */
287 static int crmf_asn1_get_int(const ASN1_INTEGER
*a
)
291 if (!ASN1_INTEGER_get_int64(&res
, a
)) {
292 CRMFerr(0, ASN1_R_INVALID_NUMBER
);
296 CRMFerr(0, ASN1_R_TOO_SMALL
);
300 CRMFerr(0, ASN1_R_TOO_LARGE
);
306 int OSSL_CRMF_MSG_get_certReqId(OSSL_CRMF_MSG
*crm
)
308 if (crm
== NULL
|| /* not really needed: */ crm
->certReq
== NULL
) {
309 CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID
, CRMF_R_NULL_ARGUMENT
);
312 return crmf_asn1_get_int(crm
->certReq
->certReqId
);
316 int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG
*crm
,
317 X509_EXTENSIONS
*exts
)
319 OSSL_CRMF_CERTTEMPLATE
*tmpl
= OSSL_CRMF_MSG_get0_tmpl(crm
);
321 if (tmpl
== NULL
) { /* also crm == NULL implies this */
322 CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS
, CRMF_R_NULL_ARGUMENT
);
326 if (sk_X509_EXTENSION_num(exts
) == 0) {
327 sk_X509_EXTENSION_free(exts
);
328 exts
= NULL
; /* do not include empty extensions list */
331 sk_X509_EXTENSION_pop_free(tmpl
->extensions
, X509_EXTENSION_free
);
332 tmpl
->extensions
= exts
;
337 int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG
*crm
,
341 OSSL_CRMF_CERTTEMPLATE
*tmpl
= OSSL_CRMF_MSG_get0_tmpl(crm
);
343 if (tmpl
== NULL
|| ext
== NULL
) { /* also crm == NULL implies this */
344 CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION
, CRMF_R_NULL_ARGUMENT
);
348 if (tmpl
->extensions
== NULL
) {
349 if ((tmpl
->extensions
= sk_X509_EXTENSION_new_null()) == NULL
)
354 if (!sk_X509_EXTENSION_push(tmpl
->extensions
, ext
))
359 sk_X509_EXTENSION_free(tmpl
->extensions
);
360 tmpl
->extensions
= NULL
;
365 /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */
366 static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY
*ps
,
367 OSSL_CRMF_CERTREQUEST
*cr
,
368 EVP_PKEY
*pkey
, int dgst
)
373 unsigned char *crder
= NULL
, *sig
= NULL
;
376 const EVP_MD
*alg
= NULL
;
377 EVP_MD_CTX
*ctx
= NULL
;
380 if (ps
== NULL
|| cr
== NULL
|| pkey
== NULL
) {
381 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
, CRMF_R_NULL_ARGUMENT
);
385 /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */
386 ps
->signature
->flags
&= ~(ASN1_STRING_FLAG_BITS_LEFT
| 0x07);
387 ps
->signature
->flags
|= ASN1_STRING_FLAG_BITS_LEFT
;
389 len
= i2d_OSSL_CRMF_CERTREQUEST(cr
, &crder
);
390 if (len
< 0 || crder
== NULL
) {
391 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
, CRMF_R_ERROR
);
396 if (!OBJ_find_sigid_by_algs(&alg_nid
, dgst
, EVP_PKEY_id(pkey
))) {
397 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
,
398 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY
);
401 if (!OBJ_find_sigid_algs(alg_nid
, &md_nid
, NULL
)
402 || (alg
= EVP_get_digestbynid(md_nid
)) == NULL
) {
403 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
,
404 CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY
);
407 if (!X509_ALGOR_set0(ps
->algorithmIdentifier
, OBJ_nid2obj(alg_nid
),
409 || (ctx
= EVP_MD_CTX_new()) == NULL
410 || EVP_DigestSignInit(ctx
, NULL
, alg
, NULL
, pkey
) <= 0
411 || EVP_DigestSignUpdate(ctx
, crder
, crlen
) <= 0
412 || EVP_DigestSignFinal(ctx
, NULL
, &siglen
) <= 0) {
413 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
, CRMF_R_ERROR
);
416 if ((sig
= OPENSSL_malloc(siglen
)) == NULL
)
418 if (EVP_DigestSignFinal(ctx
, sig
, &siglen
) <= 0
419 || !ASN1_BIT_STRING_set(ps
->signature
, sig
, siglen
)) {
420 CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT
, CRMF_R_ERROR
);
427 EVP_MD_CTX_free(ctx
);
433 int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG
*crm
, EVP_PKEY
*pkey
,
436 OSSL_CRMF_POPO
*pp
= NULL
;
437 ASN1_INTEGER
*tag
= NULL
;
439 if (crm
== NULL
|| (ppmtd
== OSSL_CRMF_POPO_SIGNATURE
&& pkey
== NULL
)) {
440 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO
, CRMF_R_NULL_ARGUMENT
);
444 if (ppmtd
== OSSL_CRMF_POPO_NONE
)
446 if ((pp
= OSSL_CRMF_POPO_new()) == NULL
)
451 case OSSL_CRMF_POPO_RAVERIFIED
:
452 if ((pp
->value
.raVerified
= ASN1_NULL_new()) == NULL
)
456 case OSSL_CRMF_POPO_SIGNATURE
:
458 OSSL_CRMF_POPOSIGNINGKEY
*ps
= OSSL_CRMF_POPOSIGNINGKEY_new();
460 || !CRMF_poposigningkey_init(ps
, crm
->certReq
, pkey
, dgst
)){
461 OSSL_CRMF_POPOSIGNINGKEY_free(ps
);
464 pp
->value
.signature
= ps
;
468 case OSSL_CRMF_POPO_KEYENC
:
469 if ((pp
->value
.keyEncipherment
= OSSL_CRMF_POPOPRIVKEY_new()) == NULL
)
471 tag
= ASN1_INTEGER_new();
472 pp
->value
.keyEncipherment
->type
=
473 OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE
;
474 pp
->value
.keyEncipherment
->value
.subsequentMessage
= tag
;
476 || !ASN1_INTEGER_set(tag
, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
))
481 CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO
,
482 CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO
);
487 OSSL_CRMF_POPO_free(crm
->popo
);
492 OSSL_CRMF_POPO_free(pp
);
496 /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */
497 static int X509_PUBKEY_cmp(X509_PUBKEY
*a
, X509_PUBKEY
*b
)
499 X509_ALGOR
*algA
= NULL
, *algB
= NULL
;
504 if (a
== NULL
|| !X509_PUBKEY_get0_param(NULL
, NULL
, NULL
, &algA
, a
)
507 if (b
== NULL
|| !X509_PUBKEY_get0_param(NULL
, NULL
, NULL
, &algB
, b
)
510 if ((res
= X509_ALGOR_cmp(algA
, algB
)) != 0)
512 return EVP_PKEY_cmp(X509_PUBKEY_get0(a
), X509_PUBKEY_get0(b
));
515 /* verifies the Proof-of-Possession of the request with the given rid in reqs */
516 int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS
*reqs
,
517 int rid
, int acceptRAVerified
)
519 OSSL_CRMF_MSG
*req
= NULL
;
520 X509_PUBKEY
*pubkey
= NULL
;
521 OSSL_CRMF_POPOSIGNINGKEY
*sig
= NULL
;
524 || (req
= sk_OSSL_CRMF_MSG_value(reqs
, rid
)) == NULL
525 || req
->popo
== NULL
) {
526 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO
,
527 CRMF_R_NULL_ARGUMENT
);
531 switch (req
->popo
->type
) {
532 case OSSL_CRMF_POPO_RAVERIFIED
:
533 if (acceptRAVerified
)
536 case OSSL_CRMF_POPO_SIGNATURE
:
537 pubkey
= req
->certReq
->certTemplate
->publicKey
;
538 sig
= req
->popo
->value
.signature
;
539 if (sig
->poposkInput
!= NULL
) {
541 * According to RFC 4211: publicKey contains a copy of
542 * the public key from the certificate template. This MUST be
543 * exactly the same value as contained in the certificate template.
546 || sig
->poposkInput
->publicKey
== NULL
547 || X509_PUBKEY_cmp(pubkey
, sig
->poposkInput
->publicKey
)
549 ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT
),
550 sig
->algorithmIdentifier
, sig
->signature
,
551 sig
->poposkInput
, X509_PUBKEY_get0(pubkey
)) < 1)
555 || req
->certReq
->certTemplate
->subject
== NULL
556 || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST
),
557 sig
->algorithmIdentifier
, sig
->signature
,
559 X509_PUBKEY_get0(pubkey
)) < 1)
563 case OSSL_CRMF_POPO_KEYENC
:
565 * TODO: when OSSL_CMP_certrep_new() supports encrypted certs,
566 * return 1 if the type of req->popo->value.keyEncipherment
567 * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and
568 * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT
570 case OSSL_CRMF_POPO_KEYAGREE
:
572 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO
,
573 CRMF_R_UNSUPPORTED_POPO_METHOD
);
576 CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO
,
577 CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED
);
581 /* retrieves the serialNumber of the given cert template or NULL on error */
582 ASN1_INTEGER
*OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE
*tmpl
)
584 return tmpl
!= NULL
? tmpl
->serialNumber
: NULL
;
587 /* retrieves the issuer name of the given cert template or NULL on error */
588 X509_NAME
*OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE
*tmpl
)
590 return tmpl
!= NULL
? tmpl
->issuer
: NULL
;
593 /* retrieves the issuer name of the given CertId or NULL on error */
594 X509_NAME
*OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID
*cid
)
596 return cid
!= NULL
&& cid
->issuer
->type
== GEN_DIRNAME
?
597 cid
->issuer
->d
.directoryName
: NULL
;
600 /* retrieves the serialNumber of the given CertId or NULL on error */
601 ASN1_INTEGER
*OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID
*cid
)
603 return cid
!= NULL
? cid
->serialNumber
: NULL
;
607 * fill in certificate template.
608 * Any value argument that is NULL will leave the respective field unchanged.
610 int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE
*tmpl
,
612 const X509_NAME
*subject
,
613 const X509_NAME
*issuer
,
614 const ASN1_INTEGER
*serial
)
617 CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL
, CRMF_R_NULL_ARGUMENT
);
620 if (subject
!= NULL
&& !X509_NAME_set(&tmpl
->subject
, subject
))
622 if (issuer
!= NULL
&& !X509_NAME_set(&tmpl
->issuer
, issuer
))
624 if (serial
!= NULL
) {
625 ASN1_INTEGER_free(tmpl
->serialNumber
);
626 if ((tmpl
->serialNumber
= ASN1_INTEGER_dup(serial
)) == NULL
)
629 if (pubkey
!= NULL
&& !X509_PUBKEY_set(&tmpl
->publicKey
, pubkey
))
636 * Decrypts the certificate in the given encryptedValue using private key pkey.
637 * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2.
639 * returns a pointer to the decrypted certificate
640 * returns NULL on error or if no certificate available
642 X509
*OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(OSSL_CRMF_ENCRYPTEDVALUE
*ecert
,
645 X509
*cert
= NULL
; /* decrypted certificate */
646 EVP_CIPHER_CTX
*evp_ctx
= NULL
; /* context for symmetric encryption */
647 unsigned char *ek
= NULL
; /* decrypted symmetric encryption key */
648 size_t eksize
= 0; /* size of decrypted symmetric encryption key */
649 const EVP_CIPHER
*cipher
= NULL
; /* used cipher */
650 int cikeysize
= 0; /* key size from cipher */
651 unsigned char *iv
= NULL
; /* initial vector for symmetric encryption */
652 unsigned char *outbuf
= NULL
; /* decryption output buffer */
653 const unsigned char *p
= NULL
; /* needed for decoding ASN1 */
654 int symmAlg
= 0; /* NIDs for symmetric algorithm */
656 EVP_PKEY_CTX
*pkctx
= NULL
; /* private key context */
658 if (ecert
== NULL
|| ecert
->symmAlg
== NULL
|| ecert
->encSymmKey
== NULL
659 || ecert
->encValue
== NULL
|| pkey
== NULL
) {
660 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
661 CRMF_R_NULL_ARGUMENT
);
664 if ((symmAlg
= OBJ_obj2nid(ecert
->symmAlg
->algorithm
)) == 0) {
665 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
666 CRMF_R_UNSUPPORTED_CIPHER
);
669 /* select symmetric cipher based on algorithm given in message */
670 if ((cipher
= EVP_get_cipherbynid(symmAlg
)) == NULL
) {
671 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
672 CRMF_R_UNSUPPORTED_CIPHER
);
675 cikeysize
= EVP_CIPHER_key_length(cipher
);
676 /* first the symmetric key needs to be decrypted */
677 pkctx
= EVP_PKEY_CTX_new(pkey
, NULL
);
678 if (pkctx
!= NULL
&& EVP_PKEY_decrypt_init(pkctx
)) {
679 ASN1_BIT_STRING
*encKey
= ecert
->encSymmKey
;
683 if (EVP_PKEY_decrypt(pkctx
, NULL
, &eksize
,
684 encKey
->data
, encKey
->length
) <= 0
685 || (ek
= OPENSSL_malloc(eksize
)) == NULL
)
687 retval
= EVP_PKEY_decrypt(pkctx
, ek
, &eksize
,
688 encKey
->data
, encKey
->length
);
689 ERR_clear_error(); /* error state may have sensitive information */
690 failure
= ~constant_time_is_zero_s(constant_time_msb(retval
)
691 | constant_time_is_zero(retval
));
692 failure
|= ~constant_time_eq_s(eksize
, (size_t)cikeysize
);
694 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
695 CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY
);
701 if ((iv
= OPENSSL_malloc(EVP_CIPHER_iv_length(cipher
))) == NULL
)
703 if (ASN1_TYPE_get_octetstring(ecert
->symmAlg
->parameter
, iv
,
704 EVP_CIPHER_iv_length(cipher
))
705 != EVP_CIPHER_iv_length(cipher
)) {
706 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
707 CRMF_R_MALFORMED_IV
);
712 * d2i_X509 changes the given pointer, so use p for decoding the message and
713 * keep the original pointer in outbuf so the memory can be freed later
715 if ((p
= outbuf
= OPENSSL_malloc(ecert
->encValue
->length
+
716 EVP_CIPHER_block_size(cipher
))) == NULL
717 || (evp_ctx
= EVP_CIPHER_CTX_new()) == NULL
)
719 EVP_CIPHER_CTX_set_padding(evp_ctx
, 0);
721 if (!EVP_DecryptInit(evp_ctx
, cipher
, ek
, iv
)
722 || !EVP_DecryptUpdate(evp_ctx
, outbuf
, &outlen
,
723 ecert
->encValue
->data
,
724 ecert
->encValue
->length
)
725 || !EVP_DecryptFinal(evp_ctx
, outbuf
+ outlen
, &n
)) {
726 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
727 CRMF_R_ERROR_DECRYPTING_CERTIFICATE
);
732 /* convert decrypted certificate from DER to internal ASN.1 structure */
733 if ((cert
= d2i_X509(NULL
, &p
, outlen
)) == NULL
) {
734 CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT
,
735 CRMF_R_ERROR_DECODING_CERTIFICATE
);
738 EVP_PKEY_CTX_free(pkctx
);
739 OPENSSL_free(outbuf
);
740 EVP_CIPHER_CTX_free(evp_ctx
);
741 OPENSSL_clear_free(ek
, eksize
);