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29f178bddf
The new client has become an independent libcrpyto module in crypto/http/ and
* can handle any types of requests and responses (ASN.1-encoded and plain)
* does not include potentially busy loops when waiting for responses but
* makes use of a new timeout mechanism integrated with socket-based BIO
* supports the use of HTTP proxies and TLS, including HTTPS over proxies
* supports HTTP redirection via codes 301 and 302 for GET requests
* returns more useful diagnostics in various error situations
Also adapts - and strongly simplifies - hitherto uses of HTTP in crypto/ocsp/,
crypto/x509/x_all.c, apps/lib/apps.c, and apps/{ocsp,s_client,s_server}.c
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: David von Oheimb <david.von.oheimb@siemens.com>
(Merged from https://github.com/openssl/openssl/pull/10667)
116 lines
4.0 KiB
Plaintext
116 lines
4.0 KiB
Plaintext
=pod
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=head1 NAME
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OCSP_sendreq_new, OCSP_sendreq_nbio, OCSP_REQ_CTX_free,
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OCSP_set_max_response_length, OCSP_REQ_CTX_add1_header,
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OCSP_REQ_CTX_set1_req, OCSP_sendreq_bio - OCSP responder query functions
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=head1 SYNOPSIS
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#include <openssl/ocsp.h>
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OCSP_REQ_CTX *OCSP_sendreq_new(BIO *io, const char *path,
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OCSP_REQUEST *req, int maxline);
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int OCSP_sendreq_nbio(OCSP_RESPONSE **presp, OCSP_REQ_CTX *rctx);
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void OCSP_REQ_CTX_free(OCSP_REQ_CTX *rctx);
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void OCSP_set_max_response_length(OCSP_REQ_CTX *rctx,
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unsigned long len);
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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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int OCSP_REQ_CTX_set1_req(OCSP_REQ_CTX *rctx, const OCSP_REQUEST *req);
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OCSP_RESPONSE *OCSP_sendreq_bio(BIO *io, const char *path, OCSP_REQUEST *req);
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=head1 DESCRIPTION
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The function OCSP_sendreq_new() returns an B<OCSP_CTX> structure using the
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responder B<io>, the URL path B<path>, the OCSP request B<req> and with a
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response header maximum line length of B<maxline>. If B<maxline> is zero a
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default value of 4k is used. The OCSP request B<req> may be set to B<NULL>
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and provided later if required.
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OCSP_sendreq_nbio() performs I/O on the OCSP request context B<rctx>.
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When the operation is complete it returns the response in B<*presp>.
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OCSP_REQ_CTX_free() frees up the OCSP context B<rctx>.
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OCSP_set_max_response_length() sets the maximum response length
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for B<rctx> to B<len>. If the response exceeds this length an error occurs.
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If not set a default value of 100k is used.
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OCSP_REQ_CTX_add1_header() adds header B<name> with value B<value> to the
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context B<rctx>. It can be called more than once to add multiple headers.
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It B<MUST> be called before any calls to OCSP_sendreq_nbio(). The B<req>
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parameter in the initial to OCSP_sendreq_new() call MUST be set to B<NULL> if
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additional headers are set.
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OCSP_REQ_CTX_set1_req() sets the OCSP request in B<rctx> to B<req>. This
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function should be called after any calls to OCSP_REQ_CTX_add1_header().
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OCSP_sendreq_bio() performs an OCSP request using the responder B<io>, the URL
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path B<path>, the OCSP request B<req> and with a response header maximum line
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length 4k. It waits indefinitely on a response.
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=head1 RETURN VALUES
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OCSP_sendreq_new() returns a valid B<OCSP_REQ_CTX> structure or B<NULL>
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if an error occurred.
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OCSP_sendreq_nbio(), OCSP_REQ_CTX_add1_header() and OCSP_REQ_CTX_set1_req()
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return B<1> for success and B<0> for failure.
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OCSP_sendreq_bio() returns the B<OCSP_RESPONSE> structure sent by the
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responder or B<NULL> if an error occurred.
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OCSP_REQ_CTX_free() and OCSP_set_max_response_length()
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do not return values.
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=head1 NOTES
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These functions only perform a minimal HTTP 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 HTTP library.
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Currently only HTTP POST queries to responders are supported.
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The arguments to OCSP_sendreq_new() correspond to the components of the URL.
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For example if the responder URL is B<http://ocsp.com/ocspreq> the BIO
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B<io> should be connected to host B<ocsp.com> on port 80 and B<path>
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should be set to B<"/ocspreq">
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The headers added with OCSP_REQ_CTX_add1_header() are of the form
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"B<name>: B<value>" or just "B<name>" if B<value> is B<NULL>. So to add
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a Host header for B<ocsp.com> you would call:
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OCSP_REQ_CTX_add1_header(ctx, "Host", "ocsp.com");
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OCSP_sendreq_bio() does not support timeout nor setting extra headers.
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It is retained for compatibility.
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Better use B<OCSP_sendreq_nbio()> instead.
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=head1 SEE ALSO
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L<crypto(7)>,
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L<OCSP_cert_to_id(3)>,
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L<OCSP_request_add1_nonce(3)>,
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L<OCSP_REQUEST_new(3)>,
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L<OCSP_resp_find_status(3)>,
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L<OCSP_response_status(3)>
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=head1 COPYRIGHT
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Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). 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 LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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