| /*- |
| * Copyright 2007-2019 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" |
| |
| /* 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) \ |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGCTRL, 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_SINGLEPUBINFO, |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_PKIPUBLICATIONINFO_PUSH0_SINGLEPUBINFO, |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_PKIPUBLICATIONINFO_ACTION, |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_CERTID_GEN, 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_REGINFO, 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET0_TMPL, CRMF_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| return crm->certReq->certTemplate; |
| } |
| |
| |
| int OSSL_CRMF_MSG_set_validity(OSSL_CRMF_MSG *crm, time_t from, time_t to) |
| { |
| OSSL_CRMF_OPTIONALVALIDITY *vld = NULL; |
| ASN1_TIME *from_asn = NULL; |
| ASN1_TIME *to_asn = NULL; |
| OSSL_CRMF_CERTTEMPLATE *tmpl = OSSL_CRMF_MSG_get0_tmpl(crm); |
| |
| if (tmpl == NULL) { /* also crm == NULL implies this */ |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_VALIDITY, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (from != 0 && ((from_asn = ASN1_TIME_set(NULL, from)) == NULL)) |
| goto err; |
| if (to != 0 && ((to_asn = ASN1_TIME_set(NULL, to)) == NULL)) |
| goto err; |
| if ((vld = OSSL_CRMF_OPTIONALVALIDITY_new()) == NULL) |
| goto err; |
| |
| vld->notBefore = from_asn; |
| vld->notAfter = to_asn; |
| |
| tmpl->validity = vld; |
| |
| return 1; |
| err: |
| ASN1_TIME_free(from_asn); |
| ASN1_TIME_free(to_asn); |
| return 0; |
| } |
| |
| |
| int OSSL_CRMF_MSG_set_certReqId(OSSL_CRMF_MSG *crm, int rid) |
| { |
| if (crm == NULL || crm->certReq == NULL || crm->certReq->certReqId == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET_CERTREQID, 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)) { |
| CRMFerr(0, ASN1_R_INVALID_NUMBER); |
| return -1; |
| } |
| if (res < INT_MIN) { |
| CRMFerr(0, ASN1_R_TOO_SMALL); |
| return -1; |
| } |
| if (res > INT_MAX) { |
| CRMFerr(0, ASN1_R_TOO_LARGE); |
| return -1; |
| } |
| return (int)res; |
| } |
| |
| int OSSL_CRMF_MSG_get_certReqId(OSSL_CRMF_MSG *crm) |
| { |
| if (crm == NULL || /* not really needed: */ crm->certReq == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_GET_CERTREQID, 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 */ |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_SET0_EXTENSIONS, 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 */ |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_PUSH0_EXTENSION, 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; |
| } |
| |
| /* TODO: support cases 1+2 (besides case 3) defined in RFC 4211, section 4.1. */ |
| static int CRMF_poposigningkey_init(OSSL_CRMF_POPOSIGNINGKEY *ps, |
| OSSL_CRMF_CERTREQUEST *cr, |
| EVP_PKEY *pkey, int dgst) |
| { |
| int len; |
| size_t crlen; |
| size_t siglen; |
| unsigned char *crder = NULL, *sig = NULL; |
| int alg_nid = 0; |
| int md_nid = 0; |
| const EVP_MD *alg = NULL; |
| EVP_MD_CTX *ctx = NULL; |
| int ret = 0; |
| |
| if (ps == NULL || cr == NULL || pkey == NULL) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| /* OpenSSL defaults all bit strings to be encoded as ASN.1 NamedBitList */ |
| ps->signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); |
| ps->signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; |
| |
| len = i2d_OSSL_CRMF_CERTREQUEST(cr, &crder); |
| if (len < 0 || crder == NULL) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); |
| goto err; |
| } |
| crlen = (size_t)len; |
| |
| if (!OBJ_find_sigid_by_algs(&alg_nid, dgst, EVP_PKEY_id(pkey))) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, |
| CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); |
| goto err; |
| } |
| if (!OBJ_find_sigid_algs(alg_nid, &md_nid, NULL) |
| || (alg = EVP_get_digestbynid(md_nid)) == NULL) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, |
| CRMF_R_UNSUPPORTED_ALG_FOR_POPSIGNINGKEY); |
| goto err; |
| } |
| if (!X509_ALGOR_set0(ps->algorithmIdentifier, OBJ_nid2obj(alg_nid), |
| V_ASN1_NULL, NULL) |
| || (ctx = EVP_MD_CTX_new()) == NULL |
| || EVP_DigestSignInit(ctx, NULL, alg, NULL, pkey) <= 0 |
| || EVP_DigestSignUpdate(ctx, crder, crlen) <= 0 |
| || EVP_DigestSignFinal(ctx, NULL, &siglen) <= 0) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); |
| goto err; |
| } |
| if ((sig = OPENSSL_malloc(siglen)) == NULL) |
| goto err; |
| if (EVP_DigestSignFinal(ctx, sig, &siglen) <= 0 |
| || !ASN1_BIT_STRING_set(ps->signature, sig, siglen)) { |
| CRMFerr(CRMF_F_CRMF_POPOSIGNINGKEY_INIT, CRMF_R_ERROR); |
| goto err; |
| } |
| ret = 1; |
| |
| err: |
| OPENSSL_free(crder); |
| EVP_MD_CTX_free(ctx); |
| OPENSSL_free(sig); |
| return ret; |
| } |
| |
| |
| int OSSL_CRMF_MSG_create_popo(OSSL_CRMF_MSG *crm, EVP_PKEY *pkey, |
| int dgst, int ppmtd) |
| { |
| OSSL_CRMF_POPO *pp = NULL; |
| ASN1_INTEGER *tag = NULL; |
| |
| if (crm == NULL || (ppmtd == OSSL_CRMF_POPO_SIGNATURE && pkey == NULL)) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| if (ppmtd == OSSL_CRMF_POPO_NONE) |
| goto end; |
| if ((pp = OSSL_CRMF_POPO_new()) == NULL) |
| goto err; |
| pp->type = ppmtd; |
| |
| switch (ppmtd) { |
| 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 |
| || !CRMF_poposigningkey_init(ps, crm->certReq, pkey, dgst)){ |
| 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: |
| CRMFerr(CRMF_F_OSSL_CRMF_MSG_CREATE_POPO, |
| 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; |
| } |
| |
| /* returns 0 for equal, -1 for a < b or error on a, 1 for a > b or error on b */ |
| static int X509_PUBKEY_cmp(X509_PUBKEY *a, X509_PUBKEY *b) |
| { |
| X509_ALGOR *algA = NULL, *algB = NULL; |
| int res = 0; |
| |
| if (a == b) |
| return 0; |
| if (a == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algA, a) |
| || algA == NULL) |
| return -1; |
| if (b == NULL || !X509_PUBKEY_get0_param(NULL, NULL, NULL, &algB, b) |
| || algB == NULL) |
| return 1; |
| if ((res = X509_ALGOR_cmp(algA, algB)) != 0) |
| return res; |
| return EVP_PKEY_cmp(X509_PUBKEY_get0(a), X509_PUBKEY_get0(b)); |
| } |
| |
| /* 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_CRMF_MSG *req = NULL; |
| X509_PUBKEY *pubkey = NULL; |
| OSSL_CRMF_POPOSIGNINGKEY *sig = NULL; |
| |
| if (reqs == NULL |
| || (req = sk_OSSL_CRMF_MSG_value(reqs, rid)) == NULL |
| || req->popo == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, |
| CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| |
| switch (req->popo->type) { |
| case OSSL_CRMF_POPO_RAVERIFIED: |
| if (acceptRAVerified) |
| return 1; |
| break; |
| case OSSL_CRMF_POPO_SIGNATURE: |
| pubkey = req->certReq->certTemplate->publicKey; |
| 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 (pubkey == NULL |
| || sig->poposkInput->publicKey == NULL |
| || X509_PUBKEY_cmp(pubkey, sig->poposkInput->publicKey) |
| || ASN1_item_verify( |
| ASN1_ITEM_rptr(OSSL_CRMF_POPOSIGNINGKEYINPUT), |
| sig->algorithmIdentifier, sig->signature, |
| sig->poposkInput, X509_PUBKEY_get0(pubkey)) < 1) |
| break; |
| } else { |
| if (pubkey == NULL |
| || req->certReq->certTemplate->subject == NULL |
| || ASN1_item_verify(ASN1_ITEM_rptr(OSSL_CRMF_CERTREQUEST), |
| sig->algorithmIdentifier, sig->signature, |
| req->certReq, |
| X509_PUBKEY_get0(pubkey)) < 1) |
| break; |
| } |
| return 1; |
| case OSSL_CRMF_POPO_KEYENC: |
| /* |
| * TODO: when OSSL_CMP_certrep_new() supports encrypted certs, |
| * return 1 if the type of req->popo->value.keyEncipherment |
| * is OSSL_CRMF_POPOPRIVKEY_SUBSEQUENTMESSAGE and |
| * its value.subsequentMessage == OSSL_CRMF_SUBSEQUENTMESSAGE_ENCRCERT |
| */ |
| case OSSL_CRMF_POPO_KEYAGREE: |
| default: |
| CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, |
| CRMF_R_UNSUPPORTED_POPO_METHOD); |
| return 0; |
| } |
| CRMFerr(CRMF_F_OSSL_CRMF_MSGS_VERIFY_POPO, |
| CRMF_R_UNSUPPORTED_POPO_NOT_ACCEPTED); |
| return 0; |
| } |
| |
| /* retrieves the serialNumber of the given cert template or NULL on error */ |
| ASN1_INTEGER *OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->serialNumber : NULL; |
| } |
| |
| /* retrieves the issuer name of the given cert template or NULL on error */ |
| X509_NAME *OSSL_CRMF_CERTTEMPLATE_get0_issuer(OSSL_CRMF_CERTTEMPLATE *tmpl) |
| { |
| return tmpl != NULL ? tmpl->issuer : NULL; |
| } |
| |
| /* retrieves the issuer name of the given CertId or NULL on error */ |
| 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 */ |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_CERTTEMPLATE_FILL, CRMF_R_NULL_ARGUMENT); |
| return 0; |
| } |
| if (subject != NULL && !X509_NAME_set(&tmpl->subject, subject)) |
| return 0; |
| if (issuer != NULL && !X509_NAME_set(&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(OSSL_CRMF_ENCRYPTEDVALUE *ecert, |
| 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 */ |
| const 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 symmAlg = 0; /* NIDs for symmetric algorithm */ |
| int n, outlen = 0; |
| EVP_PKEY_CTX *pkctx = NULL; /* private key context */ |
| |
| if (ecert == NULL || ecert->symmAlg == NULL || ecert->encSymmKey == NULL |
| || ecert->encValue == NULL || pkey == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_NULL_ARGUMENT); |
| return NULL; |
| } |
| if ((symmAlg = OBJ_obj2nid(ecert->symmAlg->algorithm)) == 0) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_UNSUPPORTED_CIPHER); |
| return NULL; |
| } |
| /* select symmetric cipher based on algorithm given in message */ |
| if ((cipher = EVP_get_cipherbynid(symmAlg)) == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_UNSUPPORTED_CIPHER); |
| goto end; |
| } |
| cikeysize = EVP_CIPHER_key_length(cipher); |
| /* first the symmetric key needs to be decrypted */ |
| pkctx = EVP_PKEY_CTX_new(pkey, NULL); |
| 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) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_ERROR_DECRYPTING_SYMMETRIC_KEY); |
| goto end; |
| } |
| } else { |
| goto end; |
| } |
| if ((iv = OPENSSL_malloc(EVP_CIPHER_iv_length(cipher))) == NULL) |
| goto end; |
| if (ASN1_TYPE_get_octetstring(ecert->symmAlg->parameter, iv, |
| EVP_CIPHER_iv_length(cipher)) |
| != EVP_CIPHER_iv_length(cipher)) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| 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_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)) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_ERROR_DECRYPTING_CERTIFICATE); |
| goto end; |
| } |
| outlen += n; |
| |
| /* convert decrypted certificate from DER to internal ASN.1 structure */ |
| if ((cert = d2i_X509(NULL, &p, outlen)) == NULL) { |
| CRMFerr(CRMF_F_OSSL_CRMF_ENCRYPTEDVALUE_GET1_ENCCERT, |
| CRMF_R_ERROR_DECODING_CERTIFICATE); |
| } |
| end: |
| EVP_PKEY_CTX_free(pkctx); |
| OPENSSL_free(outbuf); |
| EVP_CIPHER_CTX_free(evp_ctx); |
| OPENSSL_clear_free(ek, eksize); |
| OPENSSL_free(iv); |
| return cert; |
| } |
