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.\" ========================================================================
.\"
.IX Title "OCSP_SENDREQ_NEW 3"
.TH OCSP_SENDREQ_NEW 3 "2021-12-14" "1.1.1m" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
OCSP_sendreq_new, OCSP_sendreq_nbio, OCSP_REQ_CTX_free, OCSP_set_max_response_length, OCSP_REQ_CTX_add1_header, OCSP_REQ_CTX_set1_req, OCSP_sendreq_bio, OCSP_REQ_CTX_i2d \&\- OCSP responder query functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ocsp.h>
\&
\& OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path, OCSP_REQUEST *req,
\& int maxline);
\&
\& int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx);
\&
\& void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx);
\&
\& void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len);
\&
\& int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
\& const char *name, const char *value);
\&
\& int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req);
\&
\& OCSP_RESPONSE *OCSP_sendreq_bio(BIO *io, const char *path, OCSP_REQUEST *req);
\&
\& int OCSP_REQ_CTX_i2d(OCSP_REQ_CTX *rctx, const char *content_type,
\& const ASN1_ITEM *it, ASN1_VALUE *req);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The function \fIOCSP_sendreq_new()\fR returns an \fB\s-1OCSP_CTX\s0\fR structure using the
responder \fBio\fR, the \s-1URL\s0 path \fBpath\fR, the \s-1OCSP\s0 request \fBreq\fR and with a
response header maximum line length of \fBmaxline\fR. If \fBmaxline\fR is zero a
default value of 4k is used. The \s-1OCSP\s0 request \fBreq\fR may be set to \fB\s-1NULL\s0\fR
and provided later if required.
.PP
\&\fIOCSP_sendreq_nbio()\fR performs nonblocking I/O on the \s-1OCSP\s0 request context
\&\fBrctx\fR. When the operation is complete it returns the response in \fB*presp\fR.
.PP
\&\fIOCSP_REQ_CTX_free()\fR frees up the \s-1OCSP\s0 context \fBrctx\fR.
.PP
\&\fIOCSP_set_max_response_length()\fR sets the maximum response length for \fBrctx\fR
to \fBlen\fR. If the response exceeds this length an error occurs. If not
set a default value of 100k is used.
.PP
\&\fIOCSP_REQ_CTX_add1_header()\fR adds header \fBname\fR with value \fBvalue\fR to the
context \fBrctx\fR. It can be called more than once to add multiple headers.
It \fB\s-1MUST\s0\fR be called before any calls to \fIOCSP_sendreq_nbio()\fR. The \fBreq\fR
parameter in the initial to \fIOCSP_sendreq_new()\fR call \s-1MUST\s0 be set to \fB\s-1NULL\s0\fR if
additional headers are set.
.PP
\&\fIOCSP_REQ_CTX_set1_req()\fR sets the \s-1OCSP\s0 request in \fBrctx\fR to \fBreq\fR. This
function should be called after any calls to \fIOCSP_REQ_CTX_add1_header()\fR.
OCSP_REQ_CTX_set1_req(rctx, req) is equivalent to the following:
.PP
.Vb 2
\& OCSP_REQ_CTX_i2d(rctx, "application/ocsp\-request",
\& ASN1_ITEM_rptr(OCSP_REQUEST), (ASN1_VALUE *)req)
.Ve
.PP
\&\fIOCSP_REQ_CTX_i2d()\fR sets the request context \fBrctx\fR to have the request
\&\fBreq\fR, which has the \s-1ASN\s0.1 type \fBit\fR.
The \fBcontent_type\fR, if not \s-1NULL\s0, will be included in the \s-1HTTP\s0 request.
The function should be called after all other headers have already been added.
.PP
\&\fIOCSP_sendreq_bio()\fR performs an \s-1OCSP\s0 request using the responder \fBio\fR, the \s-1URL\s0
path \fBpath\fR, and the \s-1OCSP\s0 request \fBreq\fR with a response header maximum line
length 4k. It waits indefinitely on a response.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIOCSP_sendreq_new()\fR returns a valid \fB\s-1OCSP_REQ_CTX\s0\fR structure or \fB\s-1NULL\s0\fR if
an error occurred.
.PP
\&\fIOCSP_sendreq_nbio()\fR returns \fB1\fR if the operation was completed successfully,
\&\fB\-1\fR if the operation should be retried and \fB0\fR if an error occurred.
.PP
\&\fIOCSP_REQ_CTX_add1_header()\fR, \fIOCSP_REQ_CTX_set1_req()\fR, and \fIOCSP_REQ_CTX_i2d()\fR
return \fB1\fR for success and \fB0\fR for failure.
.PP
\&\fIOCSP_sendreq_bio()\fR returns the \fB\s-1OCSP_RESPONSE\s0\fR structure sent by the
responder or \fB\s-1NULL\s0\fR if an error occurred.
.PP
\&\fIOCSP_REQ_CTX_free()\fR and \fIOCSP_set_max_response_length()\fR do not return values.
.SH "NOTES"
.IX Header "NOTES"
These functions only perform a minimal \s-1HTTP\s0 query to a responder. If an
application wishes to support more advanced features it should use an
alternative more complete \s-1HTTP\s0 library.
.PP
Currently only \s-1HTTP\s0 \s-1POST\s0 queries to responders are supported.
.PP
The arguments to \fIOCSP_sendreq_new()\fR correspond to the components of the \s-1URL\s0.
For example if the responder \s-1URL\s0 is \fBhttp://ocsp.com/ocspreq\fR the \s-1BIO\s0
\&\fBio\fR should be connected to host \fBocsp.com\fR on port 80 and \fBpath\fR
should be set to \fB\*(L"/ocspreq\*(R"\fR
.PP
The headers added with \fIOCSP_REQ_CTX_add1_header()\fR are of the form
"\fBname\fR: \fBvalue\fR\*(L" or just \*(R"\fBname\fR" if \fBvalue\fR is \fB\s-1NULL\s0\fR. So to add
a Host header for \fBocsp.com\fR you would call:
.PP
.Vb 1
\& OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com");
.Ve
.PP
If \fIOCSP_sendreq_nbio()\fR indicates an operation should be retried the
corresponding \s-1BIO\s0 can be examined to determine which operation (read or
write) should be retried and appropriate action taken (for example a \fIselect()\fR
call on the underlying socket).
.PP
\&\fIOCSP_sendreq_bio()\fR does not support retries and so cannot handle nonblocking
I/O efficiently. It is retained for compatibility and its use in new
applications is not recommended.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIcrypto\fR\|(7),
\&\fIOCSP_cert_to_id\fR\|(3),
\&\fIOCSP_request_add1_nonce\fR\|(3),
\&\fIOCSP_REQUEST_new\fR\|(3),
\&\fIOCSP_resp_find_status\fR\|(3),
\&\fIOCSP_response_status\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2015\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (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>.
Copyright 2K16 - 2K18 Indonesian Hacker Rulez
;?>)