22

✏️ Editing: OCSP_set_max_response_length.3

.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "OCSP_SENDREQ_NEW 3"
.TH OCSP_SENDREQ_NEW 3 "2023-09-11" "1.1.1w" "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_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 \fBOCSP_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
\&\fBOCSP_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
\&\fBOCSP_REQ_CTX_free()\fR frees up the \s-1OCSP\s0 context \fBrctx\fR.
.PP
\&\fBOCSP_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
\&\fBOCSP_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 \fBOCSP_sendreq_nbio()\fR. The \fBreq\fR
parameter in the initial to \fBOCSP_sendreq_new()\fR call \s-1MUST\s0 be set to \fB\s-1NULL\s0\fR if
additional headers are set.
.PP
\&\fBOCSP_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 \fBOCSP_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
\&\fBOCSP_REQ_CTX_i2d()\fR sets the request context \fBrctx\fR to have the request
\&\fBreq\fR, which has the \s-1ASN.1\s0 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
\&\fBOCSP_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"
\&\fBOCSP_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
\&\fBOCSP_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
\&\fBOCSP_REQ_CTX_add1_header()\fR, \fBOCSP_REQ_CTX_set1_req()\fR, and \fBOCSP_REQ_CTX_i2d()\fR
return \fB1\fR for success and \fB0\fR for failure.
.PP
\&\fBOCSP_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
\&\fBOCSP_REQ_CTX_free()\fR and \fBOCSP_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 POST\s0 queries to responders are supported.
.PP
The arguments to \fBOCSP_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 \fBOCSP_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 \fBOCSP_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 \fBselect()\fR
call on the underlying socket).
.PP
\&\fBOCSP_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"
\&\fBcrypto\fR\|(7),
\&\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 "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>.

MR SKB