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

SYNOPSIS

 #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, const OCSP_REQUEST *req);
 
 OCSP_RESPONSE *OCSP_sendreq_bio(BIO *io, const char *path, OCSP_REQUEST *req);

DESCRIPTION

The function OCSP_sendreq_new() returns an OCSP_CTX structure using the responder io, the URL path path, the OCSP request req and with a response header maximum line length of maxline. If maxline is zero a default value of 4k is used. The OCSP request req may be set to NULL and provided later if required.

OCSP_sendreq_nbio() performs I/O on the OCSP request context rctx. When the operation is complete it returns the response in *presp.

OCSP_REQ_CTX_free() frees up the OCSP context rctx.

OCSP_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.

OCSP_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 MUST be called before any calls to OCSP_sendreq_nbio(). The req parameter in the initial to OCSP_sendreq_new() call MUST be set to NULL if additional headers are set.

OCSP_REQ_CTX_set1_req() sets the OCSP request in rctx to req. This function should be called after any calls to OCSP_REQ_CTX_add1_header().

OCSP_sendreq_bio() performs an OCSP request using the responder io, the URL path path, the OCSP request req and with a response header maximum line length 4k. It waits indefinitely on a response.

RETURN VALUES

OCSP_sendreq_new() returns a valid OCSP_REQ_CTX structure or NULL if an error occurred.

OCSP_sendreq_nbio(), OCSP_REQ_CTX_add1_header() and OCSP_REQ_CTX_set1_req() return 1 for success and 0 for failure.

OCSP_sendreq_bio() returns the OCSP_RESPONSE structure sent by the responder or NULL if an error occurred.

OCSP_REQ_CTX_free() and OCSP_set_max_response_length() do not return values.

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 http://ocsp.com/ocspreq the BIO io should be connected to host ocsp.com on port 80 and path should be set to "/ocspreq"

The headers added with OCSP_REQ_CTX_add1_header() are of the form "name: value" or just "name" if value is NULL. So to add a Host header for ocsp.com you would call:

 OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com");

OCSP_sendreq_bio() does not support timeout nor setting extra headers. It is retained for compatibility. Better use OCSP_sendreq_nbio() instead.

COPYRIGHT

Licensed under the Apache License 2.0 (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 https://www.openssl.org/source/license.html.

OpenSSL.vip