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openssl/crypto/cmp/cmp_server.c

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/*
* Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
* Copyright Nokia 2007-2019
* 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
*/
/* general CMP server functions */
#include <openssl/asn1t.h>
#include "cmp_local.h"
/* explicit #includes not strictly needed since implied by the above: */
#include <openssl/cmp.h>
#include <openssl/err.h>
DEFINE_STACK_OF(OSSL_CRMF_MSG)
DEFINE_STACK_OF(X509)
DEFINE_STACK_OF(OSSL_CMP_ITAV)
DEFINE_STACK_OF(OSSL_CMP_CERTSTATUS)
/* the context for the generic CMP server */
struct ossl_cmp_srv_ctx_st
{
OSSL_CMP_CTX *ctx; /* Client CMP context, partly reused for srv */
void *custom_ctx; /* pointer to specific server context */
OSSL_CMP_SRV_cert_request_cb_t process_cert_request;
OSSL_CMP_SRV_rr_cb_t process_rr;
OSSL_CMP_SRV_genm_cb_t process_genm;
OSSL_CMP_SRV_error_cb_t process_error;
OSSL_CMP_SRV_certConf_cb_t process_certConf;
OSSL_CMP_SRV_pollReq_cb_t process_pollReq;
int sendUnprotectedErrors; /* Send error and rejection msgs unprotected */
int acceptUnprotected; /* Accept requests with no/invalid prot. */
int acceptRAVerified; /* Accept ir/cr/kur with POPO RAVerified */
int grantImplicitConfirm; /* Grant implicit confirmation if requested */
}; /* OSSL_CMP_SRV_CTX */
void OSSL_CMP_SRV_CTX_free(OSSL_CMP_SRV_CTX *srv_ctx)
{
if (srv_ctx == NULL)
return;
OSSL_CMP_CTX_free(srv_ctx->ctx);
OPENSSL_free(srv_ctx);
}
OSSL_CMP_SRV_CTX *OSSL_CMP_SRV_CTX_new(void)
{
OSSL_CMP_SRV_CTX *ctx = OPENSSL_zalloc(sizeof(OSSL_CMP_SRV_CTX));
if (ctx == NULL)
goto err;
if ((ctx->ctx = OSSL_CMP_CTX_new()) == NULL)
goto err;
/* all other elements are initialized to 0 or NULL, respectively */
return ctx;
err:
OSSL_CMP_SRV_CTX_free(ctx);
return NULL;
}
int OSSL_CMP_SRV_CTX_init(OSSL_CMP_SRV_CTX *srv_ctx, void *custom_ctx,
OSSL_CMP_SRV_cert_request_cb_t process_cert_request,
OSSL_CMP_SRV_rr_cb_t process_rr,
OSSL_CMP_SRV_genm_cb_t process_genm,
OSSL_CMP_SRV_error_cb_t process_error,
OSSL_CMP_SRV_certConf_cb_t process_certConf,
OSSL_CMP_SRV_pollReq_cb_t process_pollReq)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
srv_ctx->custom_ctx = custom_ctx;
srv_ctx->process_cert_request = process_cert_request;
srv_ctx->process_rr = process_rr;
srv_ctx->process_genm = process_genm;
srv_ctx->process_error = process_error;
srv_ctx->process_certConf = process_certConf;
srv_ctx->process_pollReq = process_pollReq;
return 1;
}
OSSL_CMP_CTX *OSSL_CMP_SRV_CTX_get0_cmp_ctx(const OSSL_CMP_SRV_CTX *srv_ctx)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return NULL;
}
return srv_ctx->ctx;
}
void *OSSL_CMP_SRV_CTX_get0_custom_ctx(const OSSL_CMP_SRV_CTX *srv_ctx)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return NULL;
}
return srv_ctx->custom_ctx;
}
int OSSL_CMP_SRV_CTX_set_send_unprotected_errors(OSSL_CMP_SRV_CTX *srv_ctx,
int val)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
srv_ctx->sendUnprotectedErrors = val != 0;
return 1;
}
int OSSL_CMP_SRV_CTX_set_accept_unprotected(OSSL_CMP_SRV_CTX *srv_ctx, int val)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
srv_ctx->acceptUnprotected = val != 0;
return 1;
}
int OSSL_CMP_SRV_CTX_set_accept_raverified(OSSL_CMP_SRV_CTX *srv_ctx, int val)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
srv_ctx->acceptRAVerified = val != 0;
return 1;
}
int OSSL_CMP_SRV_CTX_set_grant_implicit_confirm(OSSL_CMP_SRV_CTX *srv_ctx,
int val)
{
if (srv_ctx == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
srv_ctx->grantImplicitConfirm = val != 0;
return 1;
}
/*
* Processes an ir/cr/p10cr/kur and returns a certification response.
* Only handles the first certification request contained in req
* returns an ip/cp/kup on success and NULL on error
*/
static OSSL_CMP_MSG *process_cert_request(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_MSG *msg = NULL;
OSSL_CMP_PKISI *si = NULL;
X509 *certOut = NULL;
STACK_OF(X509) *chainOut = NULL, *caPubs = NULL;
const OSSL_CRMF_MSG *crm = NULL;
const X509_REQ *p10cr = NULL;
int bodytype;
int certReqId;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
switch (ossl_cmp_msg_get_bodytype(req)) {
case OSSL_CMP_PKIBODY_P10CR:
case OSSL_CMP_PKIBODY_CR:
bodytype = OSSL_CMP_PKIBODY_CP;
break;
case OSSL_CMP_PKIBODY_IR:
bodytype = OSSL_CMP_PKIBODY_IP;
break;
case OSSL_CMP_PKIBODY_KUR:
bodytype = OSSL_CMP_PKIBODY_KUP;
break;
default:
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
return NULL;
}
if (ossl_cmp_msg_get_bodytype(req) == OSSL_CMP_PKIBODY_P10CR) {
certReqId = OSSL_CMP_CERTREQID;
p10cr = req->body->value.p10cr;
} else {
OSSL_CRMF_MSGS *reqs = req->body->value.ir; /* same for cr and kur */
if (sk_OSSL_CRMF_MSG_num(reqs) != 1) { /* TODO: handle case > 1 */
CMPerr(0, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED);
return NULL;
}
if ((crm = sk_OSSL_CRMF_MSG_value(reqs, OSSL_CMP_CERTREQID)) == NULL) {
CMPerr(0, CMP_R_CERTREQMSG_NOT_FOUND);
return NULL;
}
certReqId = OSSL_CRMF_MSG_get_certReqId(crm);
}
if (!ossl_cmp_verify_popo(req, srv_ctx->acceptRAVerified)) {
/* Proof of possession could not be verified */
si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection,
1 << OSSL_CMP_PKIFAILUREINFO_badPOP,
ERR_reason_error_string(ERR_peek_error()));
if (si == NULL)
return NULL;
} else {
OSSL_CMP_PKIHEADER *hdr = OSSL_CMP_MSG_get0_header(req);
si = srv_ctx->process_cert_request(srv_ctx, req, certReqId, crm, p10cr,
&certOut, &chainOut, &caPubs);
if (si == NULL)
goto err;
/* set OSSL_CMP_OPT_IMPLICIT_CONFIRM if and only if transaction ends */
if (!OSSL_CMP_CTX_set_option(srv_ctx->ctx,
OSSL_CMP_OPT_IMPLICIT_CONFIRM,
ossl_cmp_hdr_has_implicitConfirm(hdr)
&& srv_ctx->grantImplicitConfirm
/* do not set if polling starts: */
&& certOut != NULL))
goto err;
}
msg = ossl_cmp_certRep_new(srv_ctx->ctx, bodytype, certReqId, si,
certOut, chainOut, caPubs, 0 /* encrypted */,
srv_ctx->sendUnprotectedErrors);
/*
* TODO when implemented in ossl_cmp_certrep_new():
* in case OSSL_CRMF_POPO_KEYENC, set encrypted
*/
if (msg == NULL)
CMPerr(0, CMP_R_ERROR_CREATING_CERTREP);
err:
OSSL_CMP_PKISI_free(si);
X509_free(certOut);
sk_X509_pop_free(chainOut, X509_free);
sk_X509_pop_free(caPubs, X509_free);
return msg;
}
static OSSL_CMP_MSG *process_rr(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_MSG *msg = NULL;
OSSL_CMP_REVDETAILS *details;
OSSL_CRMF_CERTID *certId;
OSSL_CRMF_CERTTEMPLATE *tmpl;
const X509_NAME *issuer;
ASN1_INTEGER *serial;
OSSL_CMP_PKISI *si;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
if (sk_OSSL_CMP_REVDETAILS_num(req->body->value.rr) != 1) {
/* TODO: handle multiple elements if multiple requests have been sent */
CMPerr(0, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED);
return NULL;
}
if ((details = sk_OSSL_CMP_REVDETAILS_value(req->body->value.rr,
OSSL_CMP_REVREQSID)) == NULL) {
CMPerr(0, CMP_R_ERROR_PROCESSING_MESSAGE);
return NULL;
}
tmpl = details->certDetails;
issuer = OSSL_CRMF_CERTTEMPLATE_get0_issuer(tmpl);
serial = OSSL_CRMF_CERTTEMPLATE_get0_serialNumber(tmpl);
/* here issuer and serial may safely be NULL */
if ((certId = OSSL_CRMF_CERTID_gen(issuer, serial)) == NULL)
return NULL;
if ((si = srv_ctx->process_rr(srv_ctx, req, issuer, serial)) == NULL)
goto err;
if ((msg = ossl_cmp_rp_new(srv_ctx->ctx, si, certId,
srv_ctx->sendUnprotectedErrors)) == NULL)
CMPerr(0, CMP_R_ERROR_CREATING_RR);
err:
OSSL_CRMF_CERTID_free(certId);
OSSL_CMP_PKISI_free(si);
return msg;
}
/*
* Processes genm and creates a genp message mirroring the contents of the
* incoming message
*/
static OSSL_CMP_MSG *process_genm(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_GENMSGCONTENT *itavs;
OSSL_CMP_MSG *msg;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
if (!srv_ctx->process_genm(srv_ctx, req, req->body->value.genm, &itavs))
return NULL;
msg = ossl_cmp_genp_new(srv_ctx->ctx, itavs);
sk_OSSL_CMP_ITAV_pop_free(itavs, OSSL_CMP_ITAV_free);
return msg;
}
static OSSL_CMP_MSG *process_error(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_ERRORMSGCONTENT *errorContent;
OSSL_CMP_MSG *msg;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
errorContent = req->body->value.error;
srv_ctx->process_error(srv_ctx, req, errorContent->pKIStatusInfo,
errorContent->errorCode, errorContent->errorDetails);
if ((msg = ossl_cmp_pkiconf_new(srv_ctx->ctx)) == NULL)
CMPerr(0, CMP_R_ERROR_CREATING_PKICONF);
return msg;
}
static OSSL_CMP_MSG *process_certConf(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_CTX *ctx;
OSSL_CMP_CERTCONFIRMCONTENT *ccc;
int num;
OSSL_CMP_MSG *msg = NULL;
OSSL_CMP_CERTSTATUS *status = NULL;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
ctx = srv_ctx->ctx;
ccc = req->body->value.certConf;
num = sk_OSSL_CMP_CERTSTATUS_num(ccc);
if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 1) {
CMPerr(0, CMP_R_ERROR_UNEXPECTED_CERTCONF);
return NULL;
}
if (num == 0) {
ossl_cmp_err(ctx, "certificate rejected by client");
} else {
if (num > 1)
ossl_cmp_warn(ctx, "All CertStatus but the first will be ignored");
status = sk_OSSL_CMP_CERTSTATUS_value(ccc, OSSL_CMP_CERTREQID);
}
if (status != NULL) {
int certReqId = ossl_cmp_asn1_get_int(status->certReqId);
ASN1_OCTET_STRING *certHash = status->certHash;
OSSL_CMP_PKISI *si = status->statusInfo;
if (!srv_ctx->process_certConf(srv_ctx, req, certReqId, certHash, si))
return NULL; /* reason code may be: CMP_R_CERTHASH_UNMATCHED */
if (si != NULL && ossl_cmp_pkisi_get_status(si)
!= OSSL_CMP_PKISTATUS_accepted) {
int pki_status = ossl_cmp_pkisi_get_status(si);
const char *str = ossl_cmp_PKIStatus_to_string(pki_status);
ossl_cmp_log2(INFO, ctx, "certificate rejected by client %s %s",
str == NULL ? "without" : "with",
str == NULL ? "PKIStatus" : str);
}
}
if ((msg = ossl_cmp_pkiconf_new(ctx)) == NULL)
CMPerr(0, CMP_R_ERROR_CREATING_PKICONF);
return msg;
}
static OSSL_CMP_MSG *process_pollReq(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_POLLREQCONTENT *prc;
OSSL_CMP_POLLREQ *pr;
int certReqId;
OSSL_CMP_MSG *certReq;
int64_t check_after = 0;
OSSL_CMP_MSG *msg = NULL;
if (!ossl_assert(srv_ctx != NULL && srv_ctx->ctx != NULL && req != NULL))
return NULL;
prc = req->body->value.pollReq;
if (sk_OSSL_CMP_POLLREQ_num(prc) != 1) { /* TODO: handle case > 1 */
CMPerr(0, CMP_R_MULTIPLE_REQUESTS_NOT_SUPPORTED);
return NULL;
}
pr = sk_OSSL_CMP_POLLREQ_value(prc, 0);
certReqId = ossl_cmp_asn1_get_int(pr->certReqId);
if (!srv_ctx->process_pollReq(srv_ctx, req, certReqId,
&certReq, &check_after))
return NULL;
if (certReq != NULL) {
msg = process_cert_request(srv_ctx, certReq);
OSSL_CMP_MSG_free(certReq);
} else {
if ((msg = ossl_cmp_pollRep_new(srv_ctx->ctx, certReqId,
check_after)) == NULL)
CMPerr(0, CMP_R_ERROR_CREATING_POLLREP);
}
return msg;
}
/*
* Determine whether missing/invalid protection of request message is allowed.
* Return 1 on acceptance, 0 on rejection, or -1 on (internal) error.
*/
static int unprotected_exception(const OSSL_CMP_CTX *ctx,
const OSSL_CMP_MSG *req,
int invalid_protection,
int accept_unprotected_requests)
{
if (!ossl_assert(ctx != NULL && req != NULL))
return -1;
if (accept_unprotected_requests) {
ossl_cmp_log1(WARN, ctx, "ignoring %s protection of request message",
invalid_protection ? "invalid" : "missing");
return 1;
}
if (ossl_cmp_msg_get_bodytype(req) == OSSL_CMP_PKIBODY_ERROR
&& OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_UNPROTECTED_ERRORS) == 1) {
ossl_cmp_warn(ctx, "ignoring missing protection of error message");
return 1;
}
return 0;
}
/*
* returns created message and NULL on internal error
*/
OSSL_CMP_MSG *OSSL_CMP_SRV_process_request(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_CTX *ctx;
OSSL_CMP_PKIHEADER *hdr;
int req_type, rsp_type;
OSSL_CMP_MSG *rsp = NULL;
if (srv_ctx == NULL || srv_ctx->ctx == NULL
|| req == NULL || req->body == NULL
|| (hdr = OSSL_CMP_MSG_get0_header(req)) == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
ctx = srv_ctx->ctx;
if (hdr->sender->type != GEN_DIRNAME) {
CMPerr(0, CMP_R_SENDER_GENERALNAME_TYPE_NOT_SUPPORTED);
goto err;
}
if (!OSSL_CMP_CTX_set1_recipient(ctx, hdr->sender->d.directoryName))
goto err;
req_type = ossl_cmp_msg_get_bodytype(req);
switch (req_type) {
case OSSL_CMP_PKIBODY_IR:
case OSSL_CMP_PKIBODY_CR:
case OSSL_CMP_PKIBODY_P10CR:
case OSSL_CMP_PKIBODY_KUR:
case OSSL_CMP_PKIBODY_RR:
case OSSL_CMP_PKIBODY_GENM:
case OSSL_CMP_PKIBODY_ERROR:
if (ctx->transactionID != NULL) {
char *tid;
tid = OPENSSL_buf2hexstr(ctx->transactionID->data,
ctx->transactionID->length);
ossl_cmp_log1(WARN, ctx,
"Assuming that last transaction with ID=%s got aborted",
tid);
OPENSSL_free(tid);
}
/* start of a new transaction, reset transactionID and senderNonce */
if (!OSSL_CMP_CTX_set1_transactionID(ctx, NULL)
|| !OSSL_CMP_CTX_set1_senderNonce(ctx, NULL))
goto err;
break;
default:
/* transactionID should be already initialized */
if (ctx->transactionID == NULL) {
#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
/* ignore any (extra) error in next two function calls: */
(void)OSSL_CMP_CTX_set1_transactionID(ctx, hdr->transactionID);
(void)ossl_cmp_ctx_set1_recipNonce(ctx, hdr->senderNonce);
goto err;
#endif
}
}
if (ossl_cmp_msg_check_received(ctx, req, unprotected_exception,
srv_ctx->acceptUnprotected) < 0)
goto err;
switch (req_type) {
case OSSL_CMP_PKIBODY_IR:
case OSSL_CMP_PKIBODY_CR:
case OSSL_CMP_PKIBODY_P10CR:
case OSSL_CMP_PKIBODY_KUR:
if (srv_ctx->process_cert_request == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_cert_request(srv_ctx, req);
break;
case OSSL_CMP_PKIBODY_RR:
if (srv_ctx->process_rr == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_rr(srv_ctx, req);
break;
case OSSL_CMP_PKIBODY_GENM:
if (srv_ctx->process_genm == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_genm(srv_ctx, req);
break;
case OSSL_CMP_PKIBODY_ERROR:
if (srv_ctx->process_error == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_error(srv_ctx, req);
break;
case OSSL_CMP_PKIBODY_CERTCONF:
if (srv_ctx->process_certConf == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_certConf(srv_ctx, req);
break;
case OSSL_CMP_PKIBODY_POLLREQ:
if (srv_ctx->process_pollReq == NULL)
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
else
rsp = process_pollReq(srv_ctx, req);
break;
default:
/* TODO possibly support further request message types */
CMPerr(0, CMP_R_UNEXPECTED_PKIBODY);
break;
}
err:
if (rsp == NULL) {
/* on error, try to respond with CMP error message to client */
const char *data = NULL;
int flags = 0;
unsigned long err = ERR_peek_error_data(&data, &flags);
int fail_info = 1 << OSSL_CMP_PKIFAILUREINFO_badRequest;
/* TODO fail_info could be more specific */
OSSL_CMP_PKISI *si = NULL;
if ((si = OSSL_CMP_STATUSINFO_new(OSSL_CMP_PKISTATUS_rejection,
fail_info, NULL)) == NULL)
return 0;
if (err != 0 && (flags & ERR_TXT_STRING) != 0)
data = ERR_reason_error_string(err);
rsp = ossl_cmp_error_new(srv_ctx->ctx, si,
err != 0 ? ERR_GET_REASON(err) : -1,
data, srv_ctx->sendUnprotectedErrors);
OSSL_CMP_PKISI_free(si);
}
/* possibly close the transaction */
rsp_type =
rsp != NULL ? ossl_cmp_msg_get_bodytype(rsp) : OSSL_CMP_PKIBODY_ERROR;
switch (rsp_type) {
case OSSL_CMP_PKIBODY_IP:
case OSSL_CMP_PKIBODY_CP:
case OSSL_CMP_PKIBODY_KUP:
case OSSL_CMP_PKIBODY_RP:
if (OSSL_CMP_CTX_get_option(ctx, OSSL_CMP_OPT_IMPLICIT_CONFIRM) == 0)
break;
/* fall through */
case OSSL_CMP_PKIBODY_PKICONF:
case OSSL_CMP_PKIBODY_GENP:
case OSSL_CMP_PKIBODY_ERROR:
/* TODO possibly support further terminating response message types */
/* prepare for next transaction, ignoring any errors here: */
(void)OSSL_CMP_CTX_set1_transactionID(ctx, NULL);
(void)OSSL_CMP_CTX_set1_senderNonce(ctx, NULL);
default: /* not closing transaction in other cases */
break;
}
return rsp;
}
/*
* Server interface that may substitute OSSL_CMP_MSG_http_perform at the client.
* The OSSL_CMP_SRV_CTX must be set as client_ctx->transfer_cb_arg.
* returns received message on success, else NULL and pushes an element on the
* error stack.
*/
OSSL_CMP_MSG * OSSL_CMP_CTX_server_perform(OSSL_CMP_CTX *client_ctx,
const OSSL_CMP_MSG *req)
{
OSSL_CMP_SRV_CTX *srv_ctx = NULL;
if (client_ctx == NULL || req == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
if ((srv_ctx = OSSL_CMP_CTX_get_transfer_cb_arg(client_ctx)) == NULL) {
CMPerr(0, CMP_R_TRANSFER_ERROR);
return 0;
}
return OSSL_CMP_SRV_process_request(srv_ctx, req);
}
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