forked from cory/tildefriends
Cory McWilliams
09ddfffa6b
git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4088 ed5197a5-7fde-0310-b194-c3ffbd925b24
253 lines
9.0 KiB
Groff
253 lines
9.0 KiB
Groff
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.\" ========================================================================
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.\"
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.IX Title "OCSP_SENDREQ_NEW 3"
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.TH OCSP_SENDREQ_NEW 3 "2020-04-21" "1.1.1g" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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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 responder query functions
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/ocsp.h>
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\&
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\& OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path, OCSP_REQUEST *req,
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\& int maxline);
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\&
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\& int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx);
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\&
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\& void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx);
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\&
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\& void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx, unsigned long len);
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\&
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\& int OCSP_REQ_CTX_add1_header(OCSP_REQ_CTX *rctx,
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\& const char *name, const char *value);
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\&
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\& int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, OCSP_REQUEST *req);
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\&
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\& OCSP_RESPONSE *OCSP_sendreq_bio(BIO *io, const char *path, OCSP_REQUEST *req);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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The function \fBOCSP_sendreq_new()\fR returns an \fB\s-1OCSP_CTX\s0\fR structure using the
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responder \fBio\fR, the \s-1URL\s0 path \fBpath\fR, the \s-1OCSP\s0 request \fBreq\fR and with a
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response header maximum line length of \fBmaxline\fR. If \fBmaxline\fR is zero a
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default value of 4k is used. The \s-1OCSP\s0 request \fBreq\fR may be set to \fB\s-1NULL\s0\fR
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and provided later if required.
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.PP
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\&\fBOCSP_sendreq_nbio()\fR performs non-blocking I/O on the \s-1OCSP\s0 request context
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\&\fBrctx\fR. When the operation is complete it returns the response in \fB*presp\fR.
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.PP
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\&\fBOCSP_REQ_CTX_free()\fR frees up the \s-1OCSP\s0 context \fBrctx\fR.
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.PP
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\&\fBOCSP_set_max_response_length()\fR sets the maximum response length for \fBrctx\fR
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to \fBlen\fR. If the response exceeds this length an error occurs. If not
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set a default value of 100k is used.
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.PP
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\&\fBOCSP_REQ_CTX_add1_header()\fR adds header \fBname\fR with value \fBvalue\fR to the
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context \fBrctx\fR. It can be called more than once to add multiple headers.
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It \fB\s-1MUST\s0\fR be called before any calls to \fBOCSP_sendreq_nbio()\fR. The \fBreq\fR
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parameter in the initial to \fBOCSP_sendreq_new()\fR call \s-1MUST\s0 be set to \fB\s-1NULL\s0\fR if
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additional headers are set.
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.PP
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\&\fBOCSP_REQ_CTX_set1_req()\fR sets the \s-1OCSP\s0 request in \fBrctx\fR to \fBreq\fR. This
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function should be called after any calls to \fBOCSP_REQ_CTX_add1_header()\fR.
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.PP
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\&\fBOCSP_sendreq_bio()\fR performs an \s-1OCSP\s0 request using the responder \fBio\fR, the \s-1URL\s0
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path \fBpath\fR, and the \s-1OCSP\s0 request \fBreq\fR with a response header maximum line
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length 4k. It waits indefinitely on a response.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fBOCSP_sendreq_new()\fR returns a valid \fB\s-1OCSP_REQ_CTX\s0\fR structure or \fB\s-1NULL\s0\fR if
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an error occurred.
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.PP
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\&\fBOCSP_sendreq_nbio()\fR returns \fB1\fR if the operation was completed successfully,
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\&\fB\-1\fR if the operation should be retried and \fB0\fR if an error occurred.
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.PP
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\&\fBOCSP_REQ_CTX_add1_header()\fR and \fBOCSP_REQ_CTX_set1_req()\fR return \fB1\fR for success
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and \fB0\fR for failure.
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.PP
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\&\fBOCSP_sendreq_bio()\fR returns the \fB\s-1OCSP_RESPONSE\s0\fR structure sent by the
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responder or \fB\s-1NULL\s0\fR if an error occurred.
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.PP
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\&\fBOCSP_REQ_CTX_free()\fR and \fBOCSP_set_max_response_length()\fR do not return values.
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.SH "NOTES"
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.IX Header "NOTES"
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These functions only perform a minimal \s-1HTTP\s0 query to a responder. If an
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application wishes to support more advanced features it should use an
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alternative more complete \s-1HTTP\s0 library.
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.PP
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Currently only \s-1HTTP POST\s0 queries to responders are supported.
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.PP
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The arguments to \fBOCSP_sendreq_new()\fR correspond to the components of the \s-1URL.\s0
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For example if the responder \s-1URL\s0 is \fBhttp://ocsp.com/ocspreq\fR the \s-1BIO\s0
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\&\fBio\fR should be connected to host \fBocsp.com\fR on port 80 and \fBpath\fR
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should be set to \fB\*(L"/ocspreq\*(R"\fR
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.PP
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The headers added with \fBOCSP_REQ_CTX_add1_header()\fR are of the form
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"\fBname\fR: \fBvalue\fR\*(L" or just \*(R"\fBname\fR" if \fBvalue\fR is \fB\s-1NULL\s0\fR. So to add
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a Host header for \fBocsp.com\fR you would call:
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.PP
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.Vb 1
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\& OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com");
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.Ve
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.PP
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If \fBOCSP_sendreq_nbio()\fR indicates an operation should be retried the
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corresponding \s-1BIO\s0 can be examined to determine which operation (read or
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write) should be retried and appropriate action taken (for example a \fBselect()\fR
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call on the underlying socket).
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.PP
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\&\fBOCSP_sendreq_bio()\fR does not support retries and so cannot handle non-blocking
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I/O efficiently. It is retained for compatibility and its use in new
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applications is not recommended.
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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\&\fBcrypto\fR\|(7),
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\&\fBOCSP_cert_to_id\fR\|(3),
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\&\fBOCSP_request_add1_nonce\fR\|(3),
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\&\fBOCSP_REQUEST_new\fR\|(3),
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\&\fBOCSP_resp_find_status\fR\|(3),
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\&\fBOCSP_response_status\fR\|(3)
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.SH "COPYRIGHT"
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.IX Header "COPYRIGHT"
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Copyright 2015\-2020 The OpenSSL Project Authors. All Rights Reserved.
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.PP
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Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file \s-1LICENSE\s0 in the source distribution or at
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<https://www.openssl.org/source/license.html>.
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