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Title "OCSP_sendreq_new 3"
way too many mistakes in technical documents.
.nh
\fBOCSP_sendreq_nbio() performs nonblocking I/O on the \s-1OCSP\s0 request context \fBrctx. When the operation is complete it returns the response in *presp.
\fBOCSP_REQ_CTX_free() frees up the \s-1OCSP\s0 context rctx.
\fBOCSP_set_max_response_length() sets the maximum response length for rctx to len. If the response exceeds this length an error occurs. If not set a default value of 100k is used.
\fBOCSP_REQ_CTX_add1_header() adds header name with value value to the context rctx. It can be called more than once to add multiple headers. It \s-1MUST\s0 be called before any calls to OCSP_sendreq_nbio(). The req parameter in the initial to OCSP_sendreq_new() call \s-1MUST\s0 be set to \s-1NULL\s0 if additional headers are set.
\fBOCSP_REQ_CTX_set1_req() sets the \s-1OCSP\s0 request in rctx to req. This function should be called after any calls to OCSP_REQ_CTX_add1_header().
\fBOCSP_sendreq_bio() performs an \s-1OCSP\s0 request using the responder io, the \s-1URL\s0 path path, and the \s-1OCSP\s0 request req with a response header maximum line length 4k. It waits indefinitely on a response.
\fBOCSP_sendreq_nbio() returns 1 if the operation was completed successfully, \fB-1 if the operation should be retried and 0 if an error occurred.
\fBOCSP_REQ_CTX_add1_header() and OCSP_REQ_CTX_set1_req() return 1 for success and 0 for failure.
\fBOCSP_sendreq_bio() returns the \s-1OCSP_RESPONSE\s0 structure sent by the responder or \s-1NULL\s0 if an error occurred.
\fBOCSP_REQ_CTX_free() and OCSP_set_max_response_length() do not return values.
Currently only \s-1HTTP POST\s0 queries to responders are supported.
The arguments to OCSP_sendreq_new() correspond to the components of the \s-1URL.\s0 For example if the responder \s-1URL\s0 is http://ocsp.com/ocspreq the \s-1BIO\s0 \fBio should be connected to host ocsp.com on port 80 and path should be set to \*(L"/ocspreq\*(R"
The headers added with OCSP_REQ_CTX_add1_header() are of the form "name: value\*(L" or just \*(R"name" if value is \s-1NULL\s0. So to add a Host header for ocsp.com you would call:
.Vb 1 OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com"); .Ve
If OCSP_sendreq_nbio() 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 select() call on the underlying socket).
\fBOCSP_sendreq_bio() 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.
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>.
Indexes created Wed Apr 22 00:22:44 UTC 2026