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.\" ========================================================================
.\"
.IX Title "OCSP_SENDREQ_NEW 3"
.TH OCSP_SENDREQ_NEW 3 "2023-08-01" "3.0.10" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
OCSP_REQ_CTX,
OCSP_sendreq_new,
OCSP_sendreq_nbio,
OCSP_sendreq_bio,
OCSP_REQ_CTX_i2d,
OCSP_REQ_CTX_add1_header,
OCSP_REQ_CTX_free,
OCSP_set_max_response_length,
OCSP_REQ_CTX_set1_req
\&\- OCSP responder query functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ocsp.h>
\&
\& OSSL_HTTP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path,
\&                                     const OCSP_REQUEST *req, int buf_size);
\& OCSP_RESPONSE *OCSP_sendreq_bio(BIO *io, const char *path, OCSP_REQUEST *req);
.Ve
.PP
The following functions have been deprecated since OpenSSL 3.0, and can be
hidden entirely by defining \fB\s-1OPENSSL_API_COMPAT\s0\fR with a suitable version value,
see \fBopenssl_user_macros\fR\|(7):
.PP
.Vb 8
\& typedef OSSL_HTTP_REQ_CTX OCSP_REQ_CTX;
\& int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OSSL_HTTP_REQ_CTX *rctx);
\& int OCSP_REQ_CTX_i2d(OCSP_REQ_CT *rctx, const ASN1_ITEM *it, ASN1_VALUE *req);
\& int OCSP_REQ_CTX_add1_header(OCSP_REQ_CT *rctx,
\&                              const char *name, const char *value);
\& void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx);
\& void OCSP_set_max_response_length(OCSP_REQ_CT *rctx, unsigned long len);
\& int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, const OCSP_REQUEST *req);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
These functions perform an \s-1OCSP POST\s0 request / response transfer over \s-1HTTP,\s0
using the \s-1HTTP\s0 request functions described in \s-1\fBOSSL_HTTP_REQ_CTX\s0\fR\|(3).
.PP
The function \fBOCSP_sendreq_new()\fR builds a complete \fB\s-1OSSL_HTTP_REQ_CTX\s0\fR structure
with the \fB\s-1BIO\s0\fR \fIio\fR to be used for requests and response, the \s-1URL\s0 path \fIpath\fR,
optionally the \s-1OCSP\s0 request \fIreq\fR, and a response header maximum line length
of \fIbuf_size\fR. If \fIbuf_size\fR is zero a default value of 4KiB is used.
The \fIreq\fR may be set to \s-1NULL\s0 and provided later using \fBOCSP_REQ_CTX_set1_req()\fR
or \fBOSSL_HTTP_REQ_CTX_set1_req\fR\|(3).
The \fIio\fR and \fIpath\fR arguments to \fBOCSP_sendreq_new()\fR correspond to the
components of the \s-1URL.\s0
For example if the responder \s-1URL\s0 is \f(CW\*(C`http://example.com/ocspreq\*(C'\fR the \s-1BIO\s0
\&\fIio\fR should haven been connected to host \f(CW\*(C`example.com\*(C'\fR on port 80 and \fIpath\fR
should be set to \f(CW\*(C`/ocspreq\*(C'\fR.
.PP
\&\fBOCSP_sendreq_nbio()\fR attempts to send the request prepared in \fIrctx\fR
and to gather the response via \s-1HTTP,\s0 using the \s-1BIO\s0 \fIio\fR and \fIpath\fR
that were given when calling \fBOCSP_sendreq_new()\fR.
If the operation gets completed it assigns the response,
a pointer to a \fB\s-1OCSP_RESPONSE\s0\fR structure, in \fI*presp\fR.
The function may need to be called again if its result is \-1, which indicates
\&\fBBIO_should_retry\fR\|(3).  In such a case it is advisable to sleep a little in
between, using \fBBIO_wait\fR\|(3) on the read \s-1BIO\s0 to prevent a busy loop.
.PP
\&\fBOCSP_sendreq_bio()\fR combines \fBOCSP_sendreq_new()\fR with as many calls of
\&\fBOCSP_sendreq_nbio()\fR as needed and then \fBOCSP_REQ_CTX_free()\fR, with a
response header maximum line length 4k. It waits indefinitely on a response.
It does not support setting a timeout or adding headers and is retained
for compatibility; use \fBOSSL_HTTP_transfer\fR\|(3) instead.
.PP
OCSP_REQ_CTX_i2d(rctx, it, req) is equivalent to the following:
.PP
.Vb 1
\&  OSSL_HTTP_REQ_CTX_set1_req(rctx, "application/ocsp\-request", it, req)
.Ve
.PP
OCSP_REQ_CTX_set1_req(rctx, req) is equivalent to the following:
.PP
.Vb 3
\& OSSL_HTTP_REQ_CTX_set1_req(rctx, "application/ocsp\-request",
\&                            ASN1_ITEM_rptr(OCSP_REQUEST),
\&                            (const ASN1_VALUE *)req)
.Ve
.PP
The deprecated type and the remaining deprecated functions
have been superseded by the following equivalents:
\&\fB\s-1OCSP_REQ_CTX\s0\fR by \s-1\fBOSSL_HTTP_REQ_CTX\s0\fR\|(3),
\&\fBOCSP_REQ_CTX_add1_header()\fR by \fBOSSL_HTTP_REQ_CTX_add1_header\fR\|(3),
\&\fBOCSP_REQ_CTX_free()\fR by \fBOSSL_HTTP_REQ_CTX_free\fR\|(3), and
\&\fBOCSP_set_max_response_length()\fR by
\&\fBOSSL_HTTP_REQ_CTX_set_max_response_length\fR\|(3).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBOCSP_sendreq_new()\fR returns a valid \fB\s-1OSSL_HTTP_REQ_CTX\s0\fR structure or \s-1NULL\s0
if an error occurred.
.PP
\&\fBOCSP_sendreq_nbio()\fR returns 1 for success, 0 on error, \-1 if retry is needed.
.PP
\&\fBOCSP_sendreq_bio()\fR returns the \fB\s-1OCSP_RESPONSE\s0\fR structure sent by the
responder or \s-1NULL\s0 if an error occurred.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1\fBOSSL_HTTP_REQ_CTX\s0\fR\|(3), \fBOSSL_HTTP_transfer\fR\|(3),
\&\fBOCSP_cert_to_id\fR\|(3),
\&\fBOCSP_request_add1_nonce\fR\|(3),
\&\fBOCSP_REQUEST_new\fR\|(3),
\&\fBOCSP_resp_find_status\fR\|(3),
\&\fBOCSP_response_status\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fB\s-1OCSP_REQ_CTX\s0\fR,
\&\fBOCSP_REQ_CTX_i2d()\fR,
\&\fBOCSP_REQ_CTX_add1_header()\fR,
\&\fBOCSP_REQ_CTX_free()\fR,
\&\fBOCSP_set_max_response_length()\fR,
and \fBOCSP_REQ_CTX_set1_req()\fR
were deprecated in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.