OSSL_CMP_SRV_CTX_NEW(3ossl) OpenSSL OSSL_CMP_SRV_CTX_NEW(3ossl)
NAME
OSSL_CMP_SRV_process_request, OSSL_CMP_CTX_server_perform,
OSSL_CMP_SRV_CTX_new, OSSL_CMP_SRV_CTX_free,
OSSL_CMP_SRV_cert_request_cb_t, OSSL_CMP_SRV_rr_cb_t,
OSSL_CMP_SRV_certConf_cb_t, OSSL_CMP_SRV_genm_cb_t,
OSSL_CMP_SRV_error_cb_t, OSSL_CMP_SRV_pollReq_cb_t,
OSSL_CMP_SRV_CTX_init, OSSL_CMP_SRV_delayed_delivery_cb_t,
OSSL_CMP_SRV_clean_transaction_cb_t, OSSL_CMP_SRV_CTX_init_trans,
OSSL_CMP_SRV_CTX_get0_cmp_ctx, OSSL_CMP_SRV_CTX_get0_custom_ctx,
OSSL_CMP_SRV_CTX_set_send_unprotected_errors,
OSSL_CMP_SRV_CTX_set_accept_unprotected,
OSSL_CMP_SRV_CTX_set_accept_raverified,
OSSL_CMP_SRV_CTX_set_grant_implicit_confirm - generic functions to set up
and control a CMP server
SYNOPSIS
#include <openssl/cmp.h>
OSSL_CMP_MSG *OSSL_CMP_SRV_process_request(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req);
OSSL_CMP_MSG *OSSL_CMP_CTX_server_perform(OSSL_CMP_CTX *client_ctx,
const OSSL_CMP_MSG *req);
OSSL_CMP_SRV_CTX *OSSL_CMP_SRV_CTX_new(OSSL_LIB_CTX *libctx, const char *propq);
void OSSL_CMP_SRV_CTX_free(OSSL_CMP_SRV_CTX *srv_ctx);
typedef OSSL_CMP_PKISI *(*OSSL_CMP_SRV_cert_request_cb_t)(
OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
int certReqId,
const OSSL_CRMF_MSG *crm,
const X509_REQ *p10cr,
X509 **certOut,
STACK_OF(X509) **chainOut,
STACK_OF(X509) **caPubs);
typedef OSSL_CMP_PKISI *(*OSSL_CMP_SRV_rr_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
const X509_NAME *issuer,
const ASN1_INTEGER *serial);
typedef int (*OSSL_CMP_SRV_genm_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
STACK_OF(OSSL_CMP_ITAV) *in,
STACK_OF(OSSL_CMP_ITAV) **out);
typedef void (*OSSL_CMP_SRV_error_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
const OSSL_CMP_PKISI *statusInfo,
const ASN1_INTEGER *errorCode,
const OSSL_CMP_PKIFREETEXT *errorDetails);
typedef int (*OSSL_CMP_SRV_certConf_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
int certReqId,
const ASN1_OCTET_STRING *certHash,
const OSSL_CMP_PKISI *si);
typedef int (*OSSL_CMP_SRV_pollReq_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req,
int certReqId,
OSSL_CMP_MSG **certReq,
int64_t *check_after);
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);
typedef int (*OSSL_CMP_SRV_delayed_delivery_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const OSSL_CMP_MSG *req);
typedef int (*OSSL_CMP_SRV_clean_transaction_cb_t)(OSSL_CMP_SRV_CTX *srv_ctx,
const ASN1_OCTET_STRING *id);
int OSSL_CMP_SRV_CTX_init_trans(OSSL_CMP_SRV_CTX *srv_ctx,
OSSL_CMP_SRV_delayed_delivery_cb_t delay,
OSSL_CMP_SRV_clean_transaction_cb_t clean);
OSSL_CMP_CTX *OSSL_CMP_SRV_CTX_get0_cmp_ctx(const OSSL_CMP_SRV_CTX *srv_ctx);
void *OSSL_CMP_SRV_CTX_get0_custom_ctx(const OSSL_CMP_SRV_CTX *srv_ctx);
int OSSL_CMP_SRV_CTX_set_send_unprotected_errors(OSSL_CMP_SRV_CTX *srv_ctx,
int val);
int OSSL_CMP_SRV_CTX_set_accept_unprotected(OSSL_CMP_SRV_CTX *srv_ctx, int val);
int OSSL_CMP_SRV_CTX_set_accept_raverified(OSSL_CMP_SRV_CTX *srv_ctx, int val);
int OSSL_CMP_SRV_CTX_set_grant_implicit_confirm(OSSL_CMP_SRV_CTX *srv_ctx,
int val);
DESCRIPTION
OSSL_CMP_SRV_process_request() implements the generic core aspects of
Certificate Management Protocol (CMP) servers. Its arguments are the
OSSL_CMP_SRV_CTX srv_ctx and a CMP request message req. It does the
typical generic checks on req, calls the respective callback function (if
present) for more specific processing, and then assembles a response
message, which may be a CMP error message.
Since OSSL_CMP_SRV_process_request() handles only a single CMP request
message, it may need to be called multiple times until a CMP transaction
has ended. If after return of the function the expression
OSSL_CMP_CTX_get_status(OSSL_CMP_SRV_CTX_get0_cmp_ctx(srv_ctx)) yields -1
then the function has closed the current transaction, which may be due to
normal successful end of the transaction or due to an error. Otherwise,
it should be called again with the next request message of the same
transaction (which can be a certificate confirmation or a poll request
message). The function should not be called by multiple threads sharing
the same srv_ctx without explicitly serialising the calls; calling it in
parallel leads to undefined behavior. When an earlier call did not yet
finish the respective transaction, calling it in an interleaved way with
a new request belonging to a different transaction will abort the earlier
transaction and begin the new one.
OSSL_CMP_CTX_server_perform() is an interface to
OSSL_CMP_SRV_process_request() that can be used by a CMP client in the
same way as OSSL_CMP_MSG_http_perform(3). In particular, the first
parameter client_ctx is the OSSL_CMP_CTX of the client. The
OSSL_CMP_SRV_CTX must be set as transfer_cb_arg of client_ctx.
OSSL_CMP_SRV_CTX_new(3) creates and initializes an OSSL_CMP_SRV_CTX
structure associated with the library context libctx and property query
string propq, both of which may be NULL to select the defaults.
OSSL_CMP_SRV_CTX_free() deletes the given srv_ctx. If the argument is
NULL, nothing is done.
OSSL_CMP_SRV_CTX_init() sets in the given srv_ctx a custom server context
pointer as well as callback functions performing the specific processing
of CMP certificate requests, revocation requests, certificate
confirmation requests, general messages, error messages, and poll
requests. All arguments except srv_ctx may be NULL. If a callback for
some message type is not given this means that the respective type of CMP
message is not supported by the server.
OSSL_CMP_SRV_CTX_init_trans() sets in srv_ctx the optional callback
functions for initiating delayed delivery and cleaning up a transaction.
If the <delay> function is NULL then delivery of responses is never
delayed. Otherwise delay takes a custom server context and a request
message as input. It must return 1 if delivery of the respective
response shall be delayed, 0 if not, and -1 on error. If the <clean>
function is NULL then no specific cleanup is performed. Otherwise clean
takes a custom server context and a transaction ID pointer as input,
where the pointer is NULL in case a new transaction is being started and
otherwise provides the ID of the transaction being terminated. The
<clean> function should reset the respective portions of the state and
free related memory. It must return 1 on success and 0 on error.
OSSL_CMP_SRV_CTX_get0_cmp_ctx() returns the OSSL_CMP_CTX from the
srv_ctx.
OSSL_CMP_SRV_CTX_get0_custom_ctx() returns the custom server context from
srv_ctx that has been set using OSSL_CMP_SRV_CTX_init().
OSSL_CMP_SRV_CTX_set_send_unprotected_errors() enables sending error
messages and other forms of negative responses unprotected.
OSSL_CMP_SRV_CTX_set_accept_unprotected() enables acceptance of requests
without protection of with invalid protection.
OSSL_CMP_SRV_CTX_set_accept_raverified() enables acceptance of ir/cr/kur
messages with POPO 'RAVerified'.
OSSL_CMP_SRV_CTX_set_grant_implicit_confirm() enables granting implicit
confirmation of newly enrolled certificates if requested.
NOTES
CMP is defined in RFC 9810 (and CRMF in RFC 4211).
Like the OpenSSL CMP client, the CMP server implementation documented
here focuses on the Lightweight CMP Profile (RFC 9483). Among other
things, this implies that only commonly used CMP message types are
supported and that each CMP message may not contain multiple certificate
requests or responses.
So far, this server implementation is single-threaded and should not be
called in parallel for any given OSSL_CMP_SRV_CTX srv_ctx. It can handle
only one CMP transaction at a time (which, of course, is not a problem
for transactions consisting of just a single request/response message
pair).
RETURN VALUES
OSSL_CMP_SRV_process_request() returns a CMP response message, which may
be an error message, or NULL on internal errors that preclude producing a
response.
OSSL_CMP_SRV_CTX_new(3) returns a OSSL_CMP_SRV_CTX structure on success,
NULL on error.
OSSL_CMP_SRV_CTX_free() does not return a value.
OSSL_CMP_SRV_CTX_get0_cmp_ctx() returns a OSSL_CMP_CTX structure on
success, NULL on error.
OSSL_CMP_SRV_CTX_get0_custom_ctx() returns the custom server context that
has been set using OSSL_CMP_SRV_CTX_init().
All other functions return 1 on success, 0 on error.
HISTORY
The OpenSSL CMP support was added in OpenSSL 3.0.
OSSL_CMP_SRV_CTX_init_trans() supporting delayed delivery of all types of
response messages was added in OpenSSL 3.3.
COPYRIGHT
Copyright 2007-2026 The OpenSSL Project Authors. All Rights Reserved.
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>.
3.6.5 2026-09-29 OSSL_CMP_SRV_CTX_NEW(3ossl)
openssl 3.6.5 - Generated Sat Oct 3 07:27:00 CDT 2026