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310 lines
8.3 KiB
C
310 lines
8.3 KiB
C
/*
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* Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/objects.h>
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#include <openssl/x509.h>
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#include <openssl/pem.h>
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#include <openssl/x509v3.h>
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#include <openssl/ocsp.h>
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#include "ocsp_local.h"
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/*
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* Utility functions related to sending OCSP responses and extracting
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* relevant information from the request.
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*/
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int OCSP_request_onereq_count(OCSP_REQUEST *req)
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{
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return sk_OCSP_ONEREQ_num(req->tbsRequest.requestList);
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}
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OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i)
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{
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return sk_OCSP_ONEREQ_value(req->tbsRequest.requestList, i);
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}
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OCSP_CERTID *OCSP_onereq_get0_id(OCSP_ONEREQ *one)
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{
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return one->reqCert;
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}
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int OCSP_id_get0_info(ASN1_OCTET_STRING **piNameHash, ASN1_OBJECT **pmd,
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ASN1_OCTET_STRING **pikeyHash,
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ASN1_INTEGER **pserial, OCSP_CERTID *cid)
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{
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if (!cid)
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return 0;
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if (pmd)
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*pmd = cid->hashAlgorithm.algorithm;
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if (piNameHash)
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*piNameHash = &cid->issuerNameHash;
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if (pikeyHash)
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*pikeyHash = &cid->issuerKeyHash;
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if (pserial)
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*pserial = &cid->serialNumber;
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return 1;
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}
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int OCSP_request_is_signed(OCSP_REQUEST *req)
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{
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if (req->optionalSignature)
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return 1;
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return 0;
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}
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/* Create an OCSP response and encode an optional basic response */
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OCSP_RESPONSE *OCSP_response_create(int status, OCSP_BASICRESP *bs)
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{
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OCSP_RESPONSE *rsp = NULL;
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if ((rsp = OCSP_RESPONSE_new()) == NULL)
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goto err;
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if (!(ASN1_ENUMERATED_set(rsp->responseStatus, status)))
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goto err;
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if (!bs)
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return rsp;
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if ((rsp->responseBytes = OCSP_RESPBYTES_new()) == NULL)
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goto err;
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rsp->responseBytes->responseType = OBJ_nid2obj(NID_id_pkix_OCSP_basic);
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if (!ASN1_item_pack
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(bs, ASN1_ITEM_rptr(OCSP_BASICRESP), &rsp->responseBytes->response))
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goto err;
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return rsp;
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err:
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OCSP_RESPONSE_free(rsp);
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return NULL;
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}
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OCSP_SINGLERESP *OCSP_basic_add1_status(OCSP_BASICRESP *rsp,
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OCSP_CERTID *cid,
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int status, int reason,
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ASN1_TIME *revtime,
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ASN1_TIME *thisupd,
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ASN1_TIME *nextupd)
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{
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OCSP_SINGLERESP *single = NULL;
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OCSP_CERTSTATUS *cs;
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OCSP_REVOKEDINFO *ri;
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if (rsp->tbsResponseData.responses == NULL
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&& (rsp->tbsResponseData.responses
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= sk_OCSP_SINGLERESP_new_null()) == NULL)
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goto err;
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if ((single = OCSP_SINGLERESP_new()) == NULL)
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goto err;
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if (!ASN1_TIME_to_generalizedtime(thisupd, &single->thisUpdate))
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goto err;
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if (nextupd &&
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!ASN1_TIME_to_generalizedtime(nextupd, &single->nextUpdate))
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goto err;
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OCSP_CERTID_free(single->certId);
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if ((single->certId = OCSP_CERTID_dup(cid)) == NULL)
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goto err;
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cs = single->certStatus;
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switch (cs->type = status) {
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case V_OCSP_CERTSTATUS_REVOKED:
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if (!revtime) {
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OCSPerr(OCSP_F_OCSP_BASIC_ADD1_STATUS, OCSP_R_NO_REVOKED_TIME);
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goto err;
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}
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if ((cs->value.revoked = ri = OCSP_REVOKEDINFO_new()) == NULL)
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goto err;
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if (!ASN1_TIME_to_generalizedtime(revtime, &ri->revocationTime))
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goto err;
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if (reason != OCSP_REVOKED_STATUS_NOSTATUS) {
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if ((ri->revocationReason = ASN1_ENUMERATED_new()) == NULL)
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goto err;
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if (!(ASN1_ENUMERATED_set(ri->revocationReason, reason)))
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goto err;
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}
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break;
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case V_OCSP_CERTSTATUS_GOOD:
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if ((cs->value.good = ASN1_NULL_new()) == NULL)
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goto err;
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break;
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case V_OCSP_CERTSTATUS_UNKNOWN:
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if ((cs->value.unknown = ASN1_NULL_new()) == NULL)
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goto err;
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break;
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default:
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goto err;
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}
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if (!(sk_OCSP_SINGLERESP_push(rsp->tbsResponseData.responses, single)))
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goto err;
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return single;
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err:
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OCSP_SINGLERESP_free(single);
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return NULL;
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}
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/* Add a certificate to an OCSP request */
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int OCSP_basic_add1_cert(OCSP_BASICRESP *resp, X509 *cert)
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{
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if (resp->certs == NULL
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&& (resp->certs = sk_X509_new_null()) == NULL)
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return 0;
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if (!sk_X509_push(resp->certs, cert))
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return 0;
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X509_up_ref(cert);
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return 1;
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}
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/*
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* Sign an OCSP response using the parameters contained in the digest context,
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* set the responderID to the subject name in the signer's certificate, and
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* include one or more optional certificates in the response.
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*/
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int OCSP_basic_sign_ctx(OCSP_BASICRESP *brsp,
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X509 *signer, EVP_MD_CTX *ctx,
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STACK_OF(X509) *certs, unsigned long flags)
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{
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int i;
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OCSP_RESPID *rid;
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EVP_PKEY *pkey;
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if (ctx == NULL || EVP_MD_CTX_pkey_ctx(ctx) == NULL) {
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OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX, OCSP_R_NO_SIGNER_KEY);
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goto err;
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}
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pkey = EVP_PKEY_CTX_get0_pkey(EVP_MD_CTX_pkey_ctx(ctx));
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if (pkey == NULL || !X509_check_private_key(signer, pkey)) {
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OCSPerr(OCSP_F_OCSP_BASIC_SIGN_CTX,
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OCSP_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
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goto err;
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}
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if (!(flags & OCSP_NOCERTS)) {
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if (!OCSP_basic_add1_cert(brsp, signer))
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goto err;
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for (i = 0; i < sk_X509_num(certs); i++) {
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X509 *tmpcert = sk_X509_value(certs, i);
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if (!OCSP_basic_add1_cert(brsp, tmpcert))
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goto err;
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}
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}
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rid = &brsp->tbsResponseData.responderId;
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if (flags & OCSP_RESPID_KEY) {
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if (!OCSP_RESPID_set_by_key(rid, signer))
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goto err;
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} else if (!OCSP_RESPID_set_by_name(rid, signer)) {
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goto err;
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}
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if (!(flags & OCSP_NOTIME) &&
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!X509_gmtime_adj(brsp->tbsResponseData.producedAt, 0))
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goto err;
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/*
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* Right now, I think that not doing double hashing is the right thing.
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* -- Richard Levitte
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*/
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if (!OCSP_BASICRESP_sign_ctx(brsp, ctx, 0))
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goto err;
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return 1;
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err:
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return 0;
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}
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int OCSP_basic_sign(OCSP_BASICRESP *brsp,
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X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,
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STACK_OF(X509) *certs, unsigned long flags)
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{
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EVP_MD_CTX *ctx = EVP_MD_CTX_new();
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EVP_PKEY_CTX *pkctx = NULL;
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int i;
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if (ctx == NULL)
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return 0;
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if (!EVP_DigestSignInit(ctx, &pkctx, dgst, NULL, key)) {
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EVP_MD_CTX_free(ctx);
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return 0;
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}
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i = OCSP_basic_sign_ctx(brsp, signer, ctx, certs, flags);
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EVP_MD_CTX_free(ctx);
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return i;
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}
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int OCSP_RESPID_set_by_name(OCSP_RESPID *respid, X509 *cert)
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{
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if (!X509_NAME_set(&respid->value.byName, X509_get_subject_name(cert)))
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return 0;
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respid->type = V_OCSP_RESPID_NAME;
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return 1;
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}
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int OCSP_RESPID_set_by_key(OCSP_RESPID *respid, X509 *cert)
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{
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ASN1_OCTET_STRING *byKey = NULL;
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unsigned char md[SHA_DIGEST_LENGTH];
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/* RFC2560 requires SHA1 */
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if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL))
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return 0;
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byKey = ASN1_OCTET_STRING_new();
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if (byKey == NULL)
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return 0;
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if (!(ASN1_OCTET_STRING_set(byKey, md, SHA_DIGEST_LENGTH))) {
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ASN1_OCTET_STRING_free(byKey);
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return 0;
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}
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respid->type = V_OCSP_RESPID_KEY;
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respid->value.byKey = byKey;
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return 1;
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}
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int OCSP_RESPID_match(OCSP_RESPID *respid, X509 *cert)
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{
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if (respid->type == V_OCSP_RESPID_KEY) {
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unsigned char md[SHA_DIGEST_LENGTH];
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if (respid->value.byKey == NULL)
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return 0;
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/* RFC2560 requires SHA1 */
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if (!X509_pubkey_digest(cert, EVP_sha1(), md, NULL))
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return 0;
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return (ASN1_STRING_length(respid->value.byKey) == SHA_DIGEST_LENGTH)
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&& (memcmp(ASN1_STRING_get0_data(respid->value.byKey), md,
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SHA_DIGEST_LENGTH) == 0);
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} else if (respid->type == V_OCSP_RESPID_NAME) {
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if (respid->value.byName == NULL)
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return 0;
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return X509_NAME_cmp(respid->value.byName,
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X509_get_subject_name(cert)) == 0;
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}
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return 0;
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}
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