| /*- |
| * Copyright 2007-2021 The OpenSSL Project Authors. All Rights Reserved. |
| * Copyright Nokia 2007-2018 |
| * Copyright Siemens AG 2015-2019 |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| * |
| * CRMF implementation by Martin Peylo, Miikka Viljanen, and David von Oheimb. |
| */ |
| |
| /* |
| * This file contains the functions that handle the individual items inside |
| * the CRMF structures |
| */ |
| |
| /* |
| * NAMING |
| * |
| * The 0 functions use the supplied structure pointer directly in the parent and |
| * it will be freed up when the parent is freed. |
| * |
| * The 1 functions use a copy of the supplied structure pointer (or in some |
| * cases increases its link count) in the parent and so both should be freed up. |
| */ |
| |
| #include <openssl/asn1t.h> |
| |
| #include "crmf_local.h" |
| #include "internal/constant_time.h" |
| #include "internal/sizes.h" |
| |
| /* explicit #includes not strictly needed since implied by the above: */ |
| #include <openssl/crmf.h> |
| #include <openssl/err.h> |
| #include <openssl/evp.h> |
| |
| /*- |
| * atyp = Attribute Type |
| * valt = Value Type |
| * ctrlinf = "regCtrl" or "regInfo" |
| */ |
| #define IMPLEMENT_CRMF_CTRL_FUNC(atyp, valt, ctrlinf) \ |
| valt *OSSL_CRMF_MSG_get0_##ctrlinf##_##atyp(const OSSL_CRMF_MSG *msg) \ |
| { \ |
| int i; \ |
| STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *controls; \ |
| OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \ |
| \ |
| if (msg == NULL || msg->certReq == NULL) \ |
| return NULL; \ |
| controls = msg->certReq->controls; \ |
| for (i = 0; i < sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_num(controls); i++) { \ |
| atav = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_value(controls, i); \ |
| if (OBJ_obj2nid(atav->type) == NID_id_##ctrlinf##_##atyp) \ |
| return atav->value.atyp; \ |
| } \ |
| return NULL; \ |
| } \ |
| \ |
| int OSSL_CRMF_MSG_set1_##ctrlinf##_##atyp(OSSL_CRMF_MSG *msg, const valt *in) \ |
| { \ |
| OSSL_CRMF_ATTRIBUTETYPEANDVALUE *atav = NULL; \ |
| \ |
| if (msg == NULL || in == NULL) \ |
| goto err; \ |
| if ((atav = OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new()) == NULL) \ |
| goto err; \ |
| if ((atav->type = OBJ_nid2obj(NID_id_##ctrlinf##_##atyp)) == NULL) \ |
| goto err; \ |
| if ((atav->value.atyp = valt##_dup(in)) == NULL) \ |
| goto err; \ |
| if (!OSSL_CRMF_MSG_push0_##ctrlinf(msg, atav)) \ |
| goto err; \ |
| return 1; \ |
| err: \ |
| OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(atav); \ |
| return 0; \ |
| } |
| |
| |
| /*- |
| * Pushes the given control attribute into the controls stack of a CertRequest |
| * (section 6) |
| * returns 1 on success, 0 on error |
| */ |
| static int OSSL_CRMF_MSG_push0_regCtrl(OSSL_CRMF_MSG *crm, |
| OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ctrl) |
| { |
| int new = 0; |
| |
| if (crm == NULL || crm->certReq == NULL || ctrl == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (crm->certReq->controls == NULL) { |
| crm->certReq->controls = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); |
| if (crm->certReq->controls == NULL) |
| goto err; |
| new = 1; |
| } |
| if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->certReq->controls, ctrl)) |
| goto err; |
| |
| return 1; |
| err: |
| if (new != 0) { |
| sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(crm->certReq->controls); |
| crm->certReq->controls = NULL; |
| } |
| return 0; |
| } |
| |
| /* id-regCtrl-regToken Control (section 6.1) */ |
| IMPLEMENT_CRMF_CTRL_FUNC(regToken, ASN1_STRING, regCtrl) |
| |
| /* id-regCtrl-authenticator Control (section 6.2) */ |
| #define ASN1_UTF8STRING_dup ASN1_STRING_dup |
| IMPLEMENT_CRMF_CTRL_FUNC(authenticator, ASN1_UTF8STRING, regCtrl) |
| |
| int OSSL_CRMF_MSG_set0_SinglePubInfo(OSSL_CRMF_SINGLEPUBINFO *spi, |
| int method, GENERAL_NAME *nm) |
| { |
| if (spi == NULL |
| || method < OSSL_CRMF_PUB_METHOD_DONTCARE |
| || method > OSSL_CRMF_PUB_METHOD_LDAP) { |
| ERR_raise(ERR_LIB_CRMF, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| |
| if (!ASN1_INTEGER_set(spi->pubMethod, method)) |
| return 0; |
| GENERAL_NAME_free(spi->pubLocation); |
| spi->pubLocation = nm; |
| return 1; |
| } |
| |
| int |
| OSSL_CRMF_MSG_PKIPublicationInfo_push0_SinglePubInfo(OSSL_CRMF_PKIPUBLICATIONINFO *pi, |
| OSSL_CRMF_SINGLEPUBINFO *spi) |
| { |
| if (pi == NULL || spi == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| if (pi->pubInfos == NULL) |
| pi->pubInfos = sk_OSSL_CRMF_SINGLEPUBINFO_new_null(); |
| if (pi->pubInfos == NULL) |
| return 0; |
| |
| return sk_OSSL_CRMF_SINGLEPUBINFO_push(pi->pubInfos, spi); |
| } |
| |
| int OSSL_CRMF_MSG_set_PKIPublicationInfo_action(OSSL_CRMF_PKIPUBLICATIONINFO *pi, |
| int action) |
| { |
| if (pi == NULL |
| || action < OSSL_CRMF_PUB_ACTION_DONTPUBLISH |
| || action > OSSL_CRMF_PUB_ACTION_PLEASEPUBLISH) { |
| ERR_raise(ERR_LIB_CRMF, ERR_R_PASSED_INVALID_ARGUMENT); |
| return 0; |
| } |
| |
| return ASN1_INTEGER_set(pi->action, action); |
| } |
| |
| /* id-regCtrl-pkiPublicationInfo Control (section 6.3) */ |
| IMPLEMENT_CRMF_CTRL_FUNC(pkiPublicationInfo, OSSL_CRMF_PKIPUBLICATIONINFO, |
| regCtrl) |
| |
| /* id-regCtrl-oldCertID Control (section 6.5) from the given */ |
| IMPLEMENT_CRMF_CTRL_FUNC(oldCertID, OSSL_CRMF_CERTID, regCtrl) |
| |
| OSSL_CRMF_CERTID *OSSL_CRMF_CERTID_gen(const X509_NAME *issuer, |
| const ASN1_INTEGER *serial) |
| { |
| OSSL_CRMF_CERTID *cid = NULL; |
| |
| if (issuer == NULL || serial == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| |
| if ((cid = OSSL_CRMF_CERTID_new()) == NULL) |
| goto err; |
| |
| if (!X509_NAME_set(&cid->issuer->d.directoryName, issuer)) |
| goto err; |
| cid->issuer->type = GEN_DIRNAME; |
| |
| ASN1_INTEGER_free(cid->serialNumber); |
| if ((cid->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) |
| goto err; |
| |
| return cid; |
| |
| err: |
| OSSL_CRMF_CERTID_free(cid); |
| return NULL; |
| } |
| |
| /* |
| * id-regCtrl-protocolEncrKey Control (section 6.6) |
| */ |
| IMPLEMENT_CRMF_CTRL_FUNC(protocolEncrKey, X509_PUBKEY, regCtrl) |
| |
| /*- |
| * Pushes the attribute given in regInfo in to the CertReqMsg->regInfo stack. |
| * (section 7) |
| * returns 1 on success, 0 on error |
| */ |
| static int OSSL_CRMF_MSG_push0_regInfo(OSSL_CRMF_MSG *crm, |
| OSSL_CRMF_ATTRIBUTETYPEANDVALUE *ri) |
| { |
| STACK_OF(OSSL_CRMF_ATTRIBUTETYPEANDVALUE) *info = NULL; |
| |
| if (crm == NULL || ri == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (crm->regInfo == NULL) |
| crm->regInfo = info = sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_new_null(); |
| if (crm->regInfo == NULL) |
| goto err; |
| if (!sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_push(crm->regInfo, ri)) |
| goto err; |
| return 1; |
| |
| err: |
| if (info != NULL) |
| crm->regInfo = NULL; |
| sk_OSSL_CRMF_ATTRIBUTETYPEANDVALUE_free(info); |
| return 0; |
| } |
| |
| /* id-regInfo-utf8Pairs to regInfo (section 7.1) */ |
| IMPLEMENT_CRMF_CTRL_FUNC(utf8Pairs, ASN1_UTF8STRING, regInfo) |
| |
| /* id-regInfo-certReq to regInfo (section 7.2) */ |
| IMPLEMENT_CRMF_CTRL_FUNC(certReq, OSSL_CRMF_CERTREQUEST, regInfo) |
| |
| |
| /* retrieves the certificate template of crm */ |
| OSSL_CRMF_CERTTEMPLATE *OSSL_CRMF_MSG_get0_tmpl(const OSSL_CRMF_MSG *crm) |
| { |
| if (crm == NULL || crm->certReq == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| return crm->certReq->certTemplate; |
| } |
| |
| |
| int OSSL_CRMF_MSG_set0_validity(OSSL_CRMF_MSG *crm, |
| ASN1_TIME *notBefore, ASN1_TIME *notAfter) |
| { |
| OSSL_CRMF_OPTIONALVALIDITY *vld; |
| OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); |
| |
| if (tmpl == NULL) { /* also crm == NULL implies this */ |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL) |
| return 0; |
| vld->notBefore = notBefore; |
| vld->notAfter = notAfter; |
| tmpl->validity = vld; |
| return 1; |
| } |
| |
| |
| int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid) |
| { |
| if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| return ASN1_INTEGER_set(crm->certReq->certReqId, rid); |
| } |
| |
| /* get ASN.1 encoded integer, return -1 on error */ |
| static int crmf_asn1_get_int(const ASN1_INTEGER *a) |
| { |
| int64_t res; |
| |
| if (!ASN1_INTEGER_get_int64(&res, a)) { |
| ERR_raise(ERR_LIB_CRMF, ASN1_R_INVALID_NUMBER); |
| return -1; |
| } |
| if (res < INT_MIN) { |
| ERR_raise(ERR_LIB_CRMF, ASN1_R_TOO_SMALL); |
| return -1; |
| } |
| if (res > INT_MAX) { |
| ERR_raise(ERR_LIB_CRMF, ASN1_R_TOO_LARGE); |
| return -1; |
| } |
| return (int)res; |
| } |
| |
| int OSSL_CRMF_MSG_get_certReqId(const OSSL_CRMF_MSG *crm) |
| { |
| if (crm == NULL || /* not really needed: */ crm->certReq == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return -1; |
| } |
| return crmf_asn1_get_int(crm->certReq->certReqId); |
| } |
| |
| |
| int OSSL_CRMF_MSG_set0_extensions(OSSL_CRMF_MSG *crm, |
| X509_EXTENSIONS *exts) |
| { |
| OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); |
| |
| if (tmpl == NULL) { /* also crm == NULL implies this */ |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (sk_X509_EXTENSION_num(exts) == 0) { |
| sk_X509_EXTENSION_free(exts); |
| exts = NULL; /* do not include empty extensions list */ |
| } |
| |
| sk_X509_EXTENSION_pop_free(tmpl->extensions, X509_EXTENSION_free); |
| tmpl->extensions = exts; |
| return 1; |
| } |
| |
| |
| int OSSL_CRMF_MSG_push0_extension(OSSL_CRMF_MSG *crm, |
| X509_EXTENSION *ext) |
| { |
| int new = 0; |
| OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); |
| |
| if (tmpl == NULL || ext == NULL) { /* also crm == NULL implies this */ |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (tmpl->extensions == NULL) { |
| if ((tmpl->extensions = sk_X509_EXTENSION_new_null()) == NULL) |
| goto err; |
| new = 1; |
| } |
| |
| if (!sk_X509_EXTENSION_push(tmpl->extensions, ext)) |
| goto err; |
| return 1; |
| err: |
| if (new != 0) { |
| sk_X509_EXTENSION_free(tmpl->extensions); |
| tmpl->extensions = NULL; |
| } |
| return 0; |
| } |
| |
| static int create_popo_signature(OSSL_CRMF_POPOSIGNINGKEY *ps, |
| const OSSL_CRMF_CERTREQUEST *cr, |
| EVP_PKEY *pkey, const EVP_MD *digest, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| char name[80] = ""; |
| |
| if (ps == NULL || cr == NULL || pkey == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| if (ps->poposkInput != NULL) { |
| /* We do not support cases 1+2 defined in RFC 4211, section 4.1 */ |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPOSKINPUT_NOT_SUPPORTED); |
| return 0; |
| } |
| |
| if (EVP_PKEY_get_default_digest_name(pkey, name, sizeof(name)) > 0 |
| && strcmp(name, "UNDEF") == 0) /* at least for Ed25519, Ed448 */ |
| digest = NULL; |
| |
| return ASN1_item_sign_ex(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), |
| ps->algorithmIdentifier, NULL, ps->signature, cr, |
| NULL, pkey, digest, libctx, propq); |
| } |
| |
| |
| int OSSL_CRMF_MSG_create_popo(int meth, OSSL_CRMF_MSG *crm, |
| EVP_PKEY *pkey, const EVP_MD *digest, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| OSSL_CRMF_POPO *pp = NULL; |
| ASN1_INTEGER *tag = NULL; |
| |
| if (crm == NULL || (meth == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (meth == OSSL_CRMF_POPO_NONE) |
| goto end; |
| if ((pp = OSSL_CRMF_POPO_new()) == NULL) |
| goto err; |
| pp->type = meth; |
| |
| switch (meth) { |
| case OSSL_CRMF_POPO_RAVERIFIED: |
| if ((pp->value.raVerified = ASN1_NULL_new()) == NULL) |
| goto err; |
| break; |
| |
| case OSSL_CRMF_POPO_SIGNATURE: |
| { |
| OSSL_CRMF_POPOSIGNINGKEY *ps = OSSL_CRMF_POPOSIGNINGKEY_new(); |
| |
| if (ps == NULL) |
| goto err; |
| if (!create_popo_signature(ps, crm->certReq, pkey, digest, |
| libctx, propq)) { |
| OSSL_CRMF_POPOSIGNINGKEY_free(ps); |
| goto err; |
| } |
| pp->value.signature = ps; |
| } |
| break; |
| |
| case OSSL_CRMF_POPO_KEYENC: |
| if ((pp->value.keyEncipherment = OSSL_CRMF_POPOPRIVKEY_new()) == NULL) |
| goto err; |
| tag = ASN1_INTEGER_new(); |
| pp->value.keyEncipherment->type = |
| OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE; |
| pp->value.keyEncipherment->value.subsequentMessage = tag; |
| if (tag == NULL |
| || !ASN1_INTEGER_set(tag, OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT)) |
| goto err; |
| break; |
| |
| default: |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_UNSUPPORTED_METHOD_FOR_CREATING_POPO); |
| goto err; |
| } |
| |
| end: |
| OSSL_CRMF_POPO_free(crm->popo); |
| crm->popo = pp; |
| |
| return 1; |
| err: |
| OSSL_CRMF_POPO_free(pp); |
| return 0; |
| } |
| |
| /* verifies the Proof-of-Possession of the request with the given rid in reqs */ |
| int OSSL_CRMF_MSGS_verify_popo(const OSSL_CRMF_MSGS *reqs, |
| int rid, int acceptRAVerified, |
| OSSL_LIB_CTX *libctx, const char *propq) |
| { |
| OSSL_CRMF_MSG *req = NULL; |
| X509_PUBKEY *pubkey = NULL; |
| OSSL_CRMF_POPOSIGNINGKEY *sig = NULL; |
| const ASN1_ITEM *it; |
| void *asn; |
| |
| if (reqs == NULL || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (req->popo == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_MISSING); |
| return 0; |
| } |
| |
| switch (req->popo->type) { |
| case OSSL_CRMF_POPO_RAVERIFIED: |
| if (!acceptRAVerified) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_RAVERIFIED_NOT_ACCEPTED); |
| return 0; |
| } |
| break; |
| case OSSL_CRMF_POPO_SIGNATURE: |
| pubkey = req->certReq->certTemplate->publicKey; |
| if (pubkey == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_MISSING_PUBLIC_KEY); |
| return 0; |
| } |
| sig = req->popo->value.signature; |
| if (sig->poposkInput != NULL) { |
| /* |
| * According to RFC 4211: publicKey contains a copy of |
| * the public key from the certificate template. This MUST be |
| * exactly the same value as contained in the certificate template. |
| */ |
| if (sig->poposkInput->publicKey == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_MISSING_PUBLIC_KEY); |
| return 0; |
| } |
| if (X509_PUBKEY_eq(pubkey, sig->poposkInput->publicKey) != 1) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_INCONSISTENT_PUBLIC_KEY); |
| return 0; |
| } |
| it = ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT); |
| asn = sig->poposkInput; |
| } else { |
| if (req->certReq->certTemplate->subject == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_POPO_MISSING_SUBJECT); |
| return 0; |
| } |
| it = ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST); |
| asn = req->certReq; |
| } |
| if (ASN1_item_verify_ex(it, sig->algorithmIdentifier, sig->signature, |
| asn, NULL, X509_PUBKEY_get0(pubkey), libctx, |
| propq) < 1) |
| return 0; |
| break; |
| case OSSL_CRMF_POPO_KEYENC: |
| case OSSL_CRMF_POPO_KEYAGREE: |
| default: |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_UNSUPPORTED_POPO_METHOD); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* retrieves the serialNumber of the given cert template or NULL on error */ |
| const ASN1_INTEGER |
| *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(const OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->serialNumber : NULL; |
| } |
| |
| const X509_NAME |
| *OSSL_CRMF_CERTTEMPLATE_get0_subject(const OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->subject : NULL; |
| } |
| |
| /* retrieves the issuer name of the given cert template or NULL on error */ |
| const X509_NAME |
| *OSSL_CRMF_CERTTEMPLATE_get0_issuer(const OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->issuer : NULL; |
| } |
| |
| X509_EXTENSIONS |
| *OSSL_CRMF_CERTTEMPLATE_get0_extensions(const OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->extensions : NULL; |
| } |
| |
| /* retrieves the issuer name of the given CertId or NULL on error */ |
| const X509_NAME *OSSL_CRMF_CERTID_get0_issuer(const OSSL_CRMF_CERTID *cid) |
| { |
| return cid != NULL && cid->issuer->type == GEN_DIRNAME ? |
| cid->issuer->d.directoryName : NULL; |
| } |
| |
| /* retrieves the serialNumber of the given CertId or NULL on error */ |
| const ASN1_INTEGER *OSSL_CRMF_CERTID_get0_serialNumber(const OSSL_CRMF_CERTID *cid) |
| { |
| return cid != NULL ? cid->serialNumber : NULL; |
| } |
| |
| /*- |
| * fill in certificate template. |
| * Any value argument that is NULL will leave the respective field unchanged. |
| */ |
| int OSSL_CRMF_CERTTEMPLATE_fill(OSSL_CRMF_CERTTEMPLATE *tmpl, |
| EVP_PKEY *pubkey, |
| const X509_NAME *subject, |
| const X509_NAME *issuer, |
| const ASN1_INTEGER *serial) |
| { |
| if (tmpl == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| if (subject != NULL && !X509_NAME_set((X509_NAME **)&tmpl->subject, subject)) |
| return 0; |
| if (issuer != NULL && !X509_NAME_set((X509_NAME **)&tmpl->issuer, issuer)) |
| return 0; |
| if (serial != NULL) { |
| ASN1_INTEGER_free(tmpl->serialNumber); |
| if ((tmpl->serialNumber = ASN1_INTEGER_dup(serial)) == NULL) |
| return 0; |
| } |
| if (pubkey != NULL && !X509_PUBKEY_set(&tmpl->publicKey, pubkey)) |
| return 0; |
| return 1; |
| } |
| |
| |
| /*- |
| * Decrypts the certificate in the given encryptedValue using private key pkey. |
| * This is needed for the indirect PoP method as in RFC 4210 section 5.2.8.2. |
| * |
| * returns a pointer to the decrypted certificate |
| * returns NULL on error or if no certificate available |
| */ |
| X509 |
| *OSSL_CRMF_ENCRYPTEDVALUE_get1_encCert(const OSSL_CRMF_ENCRYPTEDVALUE *ecert, |
| OSSL_LIB_CTX *libctx, const char *propq, |
| EVP_PKEY *pkey) |
| { |
| X509 *cert = NULL; /* decrypted certificate */ |
| EVP_CIPHER_CTX *evp_ctx = NULL; /* context for symmetric encryption */ |
| unsigned char *ek = NULL; /* decrypted symmetric encryption key */ |
| size_t eksize = 0; /* size of decrypted symmetric encryption key */ |
| EVP_CIPHER *cipher = NULL; /* used cipher */ |
| int cikeysize = 0; /* key size from cipher */ |
| unsigned char *iv = NULL; /* initial vector for symmetric encryption */ |
| unsigned char *outbuf = NULL; /* decryption output buffer */ |
| const unsigned char *p = NULL; /* needed for decoding ASN1 */ |
| int n, outlen = 0; |
| EVP_PKEY_CTX *pkctx = NULL; /* private key context */ |
| char name[OSSL_MAX_NAME_SIZE]; |
| |
| if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL |
| || ecert->encValue == NULL || pkey == NULL) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| |
| /* select symmetric cipher based on algorithm given in message */ |
| OBJ_obj2txt(name, sizeof(name), ecert->symmAlg->algorithm, 0); |
| |
| (void)ERR_set_mark(); |
| cipher = EVP_CIPHER_fetch(NULL, name, NULL); |
| |
| if (cipher == NULL) |
| cipher = (EVP_CIPHER *)EVP_get_cipherbyname(name); |
| |
| if (cipher == NULL) { |
| (void)ERR_clear_last_mark(); |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_UNSUPPORTED_CIPHER); |
| goto end; |
| } |
| (void)ERR_pop_to_mark(); |
| |
| cikeysize = EVP_CIPHER_get_key_length(cipher); |
| /* first the symmetric key needs to be decrypted */ |
| pkctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq); |
| if (pkctx != NULL && EVP_PKEY_decrypt_init(pkctx)) { |
| ASN1_BIT_STRING *encKey = ecert->encSymmKey; |
| size_t failure; |
| int retval; |
| |
| if (EVP_PKEY_decrypt(pkctx, NULL, &eksize, |
| encKey->data, encKey->length) <= 0 |
| || (ek = OPENSSL_malloc(eksize)) == NULL) |
| goto end; |
| retval = EVP_PKEY_decrypt(pkctx, ek, &eksize, |
| encKey->data, encKey->length); |
| ERR_clear_error(); /* error state may have sensitive information */ |
| failure = ~constant_time_is_zero_s(constant_time_msb(retval) |
| | constant_time_is_zero(retval)); |
| failure |= ~constant_time_eq_s(eksize, (size_t)cikeysize); |
| if (failure) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY); |
| goto end; |
| } |
| } else { |
| goto end; |
| } |
| if ((iv = OPENSSL_malloc(EVP_CIPHER_get_iv_length(cipher))) == NULL) |
| goto end; |
| if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv, |
| EVP_CIPHER_get_iv_length(cipher)) |
| != EVP_CIPHER_get_iv_length(cipher)) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_MALFORMED_IV); |
| goto end; |
| } |
| |
| /* |
| * d2i_X509 changes the given pointer, so use p for decoding the message and |
| * keep the original pointer in outbuf so the memory can be freed later |
| */ |
| if ((p = outbuf = OPENSSL_malloc(ecert->encValue->length + |
| EVP_CIPHER_get_block_size(cipher))) == NULL |
| || (evp_ctx = EVP_CIPHER_CTX_new()) == NULL) |
| goto end; |
| EVP_CIPHER_CTX_set_padding(evp_ctx, 0); |
| |
| if (!EVP_DecryptInit(evp_ctx, cipher, ek, iv) |
| || !EVP_DecryptUpdate(evp_ctx, outbuf, &outlen, |
| ecert->encValue->data, |
| ecert->encValue->length) |
| || !EVP_DecryptFinal(evp_ctx, outbuf + outlen, &n)) { |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_ERROR_DECRYPTING_CERTIFICATE); |
| goto end; |
| } |
| outlen += n; |
| |
| /* convert decrypted certificate from DER to internal ASN.1 structure */ |
| if ((cert = X509_new_ex(libctx, propq)) == NULL) |
| goto end; |
| if (d2i_X509(&cert, &p, outlen) == NULL) |
| ERR_raise(ERR_LIB_CRMF, CRMF_R_ERROR_DECODING_CERTIFICATE); |
| end: |
| EVP_PKEY_CTX_free(pkctx); |
| OPENSSL_free(outbuf); |
| EVP_CIPHER_CTX_free(evp_ctx); |
| EVP_CIPHER_free(cipher); |
| OPENSSL_clear_free(ek, eksize); |
| OPENSSL_free(iv); |
| return cert; |
| } |
