/* $OpenBSD: ocsp_srv.c,v 1.14 2025/05/10 05:54:38 tb Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2001.
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>

#include <openssl/objects.h>
#include <openssl/ocsp.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

#include "err_local.h"
#include "ocsp_local.h"

/* Utility functions related to sending OCSP responses and extracting
 * relevant information from the request.
 */

int
OCSP_request_onereq_count(OCSP_REQUEST *req)
{
        return sk_OCSP_ONEREQ_num(req->tbsRequest->requestList);
}
LCRYPTO_ALIAS(OCSP_request_onereq_count);

OCSP_ONEREQ *
OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)
{
        return sk_OCSP_ONEREQ_value(req->tbsRequest->requestList, i);
}
LCRYPTO_ALIAS(OCSP_request_onereq_get0);

OCSP_CERTID *
OCSP_onereq_get0_id(OCSP_ONEREQ *one)
{
        return one->reqCert;
}
LCRYPTO_ALIAS(OCSP_onereq_get0_id);

int
OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
    ASN1_OCTET_STRING **pikeyHash, ASN1_INTEGER **pserial, OCSP_CERTID *cid)
{
        if (!cid)
                return 0;
        if (pmd)
                *pmd = cid->hashAlgorithm->algorithm;
        if (piNameHash)
                *piNameHash = cid->issuerNameHash;
        if (pikeyHash)
                *pikeyHash = cid->issuerKeyHash;
        if (pserial)
                *pserial = cid->serialNumber;
        return 1;
}
LCRYPTO_ALIAS(OCSP_id_get0_info);

int
OCSP_request_is_signed(OCSP_REQUEST *req)
{
        if (req->optionalSignature)
                return 1;
        return 0;
}
LCRYPTO_ALIAS(OCSP_request_is_signed);

/* Create an OCSP response and encode an optional basic response */
OCSP_RESPONSE *
OCSP_response_create(int status, OCSP_BASICRESP *bs)
{
        OCSP_RESPONSE *rsp = NULL;

        if (!(rsp = OCSP_RESPONSE_new()))
                goto err;
        if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status)))
                goto err;
        if (!bs)
                return rsp;
        if (!(rsp->responseBytes = OCSP_RESPBYTES_new()))
                goto err;
        rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);
        if (!ASN1_item_pack(bs, &OCSP_BASICRESP_it,
            &rsp->responseBytes->response))
                goto err;
        return rsp;

err:
        if (rsp)
                OCSP_RESPONSE_free(rsp);
        return NULL;
}
LCRYPTO_ALIAS(OCSP_response_create);

OCSP_SINGLERESP *
OCSP_basic_add1_status(OCSP_BASICRESP *rsp, OCSP_CERTID *cid, int status,
    int reason, ASN1_TIME *revtime, ASN1_TIME *thisupd, ASN1_TIME *nextupd)
{
        OCSP_SINGLERESP *single = NULL;
        OCSP_CERTSTATUS *cs;
        OCSP_REVOKEDINFO *ri;

        if (!rsp->tbsResponseData->responses &&
            !(rsp->tbsResponseData->responses = sk_OCSP_SINGLERESP_new_null()))
                goto err;

        if (!(single = OCSP_SINGLERESP_new()))
                goto err;

        if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))
                goto err;
        if (nextupd &&
            !ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))
                goto err;

        OCSP_CERTID_free(single->certId);

        if (!(single->certId = OCSP_CERTID_dup(cid)))
                goto err;

        cs = single->certStatus;
        switch (cs->type = status) {
        case V_OCSP_CERTSTATUS_REVOKED:
                if (!revtime) {
                        OCSPerror(OCSP_R_NO_REVOKED_TIME);
                        goto err;
                }
                if (!(cs->value.revoked = ri = OCSP_REVOKEDINFO_new()))
                        goto err;
                if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))
                        goto err;
                if (reason != OCSP_REVOKED_STATUS_NOSTATUS) {
                        if (!(ri->revocationReason = ASN1_ENUMERATED_new()))
                                goto err;
                        if (!(ASN1_ENUMERATED_set(ri->revocationReason,
                            reason)))
                                goto err;
                }
                break;

        case V_OCSP_CERTSTATUS_GOOD:
                cs->value.good = ASN1_NULL_new();
                break;

        case V_OCSP_CERTSTATUS_UNKNOWN:
                cs->value.unknown = ASN1_NULL_new();
                break;

        default:
                goto err;
        }
        if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData->responses, single)))
                goto err;
        return single;

err:
        OCSP_SINGLERESP_free(single);
        return NULL;
}
LCRYPTO_ALIAS(OCSP_basic_add1_status);

/* Add a certificate to an OCSP request */
int
OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)
{
        if (!resp->certs && !(resp->certs = sk_X509_new_null()))
                return 0;

        if (!sk_X509_push(resp->certs, cert))
                return 0;
        X509_up_ref(cert);
        return 1;
}
LCRYPTO_ALIAS(OCSP_basic_add1_cert);

int
OCSP_basic_sign(OCSP_BASICRESP *brsp, X509 *signer, EVP_PKEY *key,
    const EVP_MD *dgst, STACK_OF(X509) *certs, unsigned long flags)
{
        int i;
        OCSP_RESPID *rid;

        if (!X509_check_private_key(signer, key)) {
                OCSPerror(OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
                goto err;
        }

        if (!(flags & OCSP_NOCERTS)) {
                if (!OCSP_basic_add1_cert(brsp, signer))
                        goto err;
                for (i = 0; i < sk_X509_num(certs); i++) {
                        X509 *tmpcert = sk_X509_value(certs, i);
                        if (!OCSP_basic_add1_cert(brsp, tmpcert))
                                goto err;
                }
        }

        rid = brsp->tbsResponseData->responderId;
        if (flags & OCSP_RESPID_KEY) {
                unsigned char md[SHA_DIGEST_LENGTH];

                X509_pubkey_digest(signer, EVP_sha1(), md, NULL);
                if (!(rid->value.byKey = ASN1_OCTET_STRING_new()))
                        goto err;
                if (!(ASN1_OCTET_STRING_set(rid->value.byKey, md,
                    SHA_DIGEST_LENGTH)))
                        goto err;
                rid->type = V_OCSP_RESPID_KEY;
        } else {
                if (!X509_NAME_set(&rid->value.byName,
                    X509_get_subject_name(signer)))
                        goto err;
                rid->type = V_OCSP_RESPID_NAME;
        }

        if (!(flags & OCSP_NOTIME) &&
            !ASN1_GENERALIZEDTIME_set(brsp->tbsResponseData->producedAt, time(NULL)))
                goto err;

        /* Right now, I think that not doing double hashing is the right
           thing.       -- Richard Levitte */

        if (!OCSP_BASICRESP_sign(brsp, key, dgst, 0))
                goto err;

        return 1;

err:
        return 0;
}
LCRYPTO_ALIAS(OCSP_basic_sign);