=pod =head1 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 responder query functions =head1 SYNOPSIS #include 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 maxline); =head1 DESCRIPTION The function OCSP_sendreq_new() returns an B structure using the responder B, the URL path B, the OCSP request B and with a response header maximum line length of B. If B is zero a default value of 4k is used. The OCSP request B may be set to B and provided later if required. OCSP_sendreq_nbio() performs non-blocking I/O on the OCSP request context B. When the operation is complete it returns the response in B<*presp>. OCSP_REQ_CTX_free() frees up the OCSP context B. OCSP_set_max_response_length() sets the maximum response length for B to B. If the response exceeds this length an error occurs. If not set a default value of 100k is used. OCSP_REQ_CTX_add1_header() adds header B with value B to the context B. It can be called more than once to add multiple headers. It B be called before any calls to OCSP_sendreq_nbio(). The B parameter in the initial to OCSP_sendreq_new() call MUST be set to B if additional headers are set. OCSP_REQ_CTX_set1_req() sets the OCSP request in B to B. This function should be called after any calls to OCSP_REQ_CTX_add1_header(). OCSP_sendreq_bio() performs an OCSP request using the responder B, the URL path B, the OCSP request B and with a response header maximum line length of B. If B is zero a default value of 4k is used. =head1 RETURN VALUES OCSP_sendreq_new() returns a valid B structure or B if an error occurred. OCSP_sendreq_nbio() returns B<1> if the operation was completed successfully, B<-1> if the operation should be retried and B<0> if an error occurred. OCSP_REQ_CTX_add1_header() and OCSP_REQ_CTX_set1_req() return B<1> for success and B<0> for failure. OCSP_sendreq_bio() returns the B structure sent by the responder or B if an error occurred. OCSP_REQ_CTX_free() and OCSP_set_max_response_length() do not return values. =head1 NOTES These functions only perform a minimal HTTP query to a responder. If an application wishes to support more advanced features it should use an alternative more complete HTTP library. Currently only HTTP POST queries to responders are supported. The arguments to OCSP_sendreq_new() correspond to the components of the URL. For example if the responder URL is B the BIO B should be connected to host B on port 80 and B should be set to B<"/ocspreq"> The headers added with OCSP_REQ_CTX_add1_header() are of the form "B: B" or just "B" if B is B. So to add a Host header for B you would call: OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com"); If OCSP_sendreq_nbio() indicates an operation should be retried the corresponding BIO 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). OCSP_sendreq_bio() does not support retries and so cannot handle non-blocking I/O efficiently. It is retained for compatibility and its use in new applications is not recommended. =head1 SEE ALSO L, L, L, L, L, L =head1 COPYRIGHT Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at L. =cut