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=head1 NAME

OCSP_REQUEST_new, OCSP_REQUEST_free, OCSP_request_add0_id, OCSP_request_sign,
OCSP_request_add1_cert, OCSP_request_onereq_count,
OCSP_request_onereq_get0 - OCSP request functions

=head1 SYNOPSIS

 #include <openssl/ocsp.h>

 OCSP_REQUEST *OCSP_REQUEST_new(void);
 void OCSP_REQUEST_free(OCSP_REQUEST *req);

 OCSP_ONEREQ *OCSP_request_add0_id(OCSP_REQUEST *req, OCSP_CERTID *cid);

 int OCSP_request_sign(OCSP_REQUEST *req,
                       X509 *signer, EVP_PKEY *key, const EVP_MD *dgst,
                       STACK_OF(X509) *certs, unsigned long flags);

 int OCSP_request_add1_cert(OCSP_REQUEST *req, X509 *cert);

 int OCSP_request_onereq_count(OCSP_REQUEST *req);
 OCSP_ONEREQ *OCSP_request_onereq_get0(OCSP_REQUEST *req, int i);

=head1 DESCRIPTION

OCSP_REQUEST_new() allocates and returns an empty B<OCSP_REQUEST> structure.

OCSP_REQUEST_free() frees up the request structure B<req>.

OCSP_request_add0_id() adds certificate ID B<cid> to B<req>. It returns
the B<OCSP_ONEREQ> structure added so an application can add additional
extensions to the request. The B<id> parameter B<MUST NOT> be freed up after
the operation.

OCSP_request_sign() signs OCSP request B<req> using certificate
B<signer>, private key B<key>, digest B<dgst> and additional certificates
B<certs>. If the B<flags> option B<OCSP_NOCERTS> is set then no certificates
will be included in the request.

OCSP_request_add1_cert() adds certificate B<cert> to request B<req>. The
application is responsible for freeing up B<cert> after use.

OCSP_request_onereq_count() returns the total number of B<OCSP_ONEREQ>
structures in B<req>.

OCSP_request_onereq_get0() returns an internal pointer to the B<OCSP_ONEREQ>
contained in B<req> of index B<i>. The index value B<i> runs from 0 to
OCSP_request_onereq_count(req) - 1.

=head1 RETURN VALUES

OCSP_REQUEST_new() returns an empty B<OCSP_REQUEST> structure or B<NULL> if
an error occurred.

OCSP_request_add0_id() returns the B<OCSP_ONEREQ> structure containing B<cid>
or B<NULL> if an error occurred.

OCSP_request_sign() and OCSP_request_add1_cert() return 1 for success and 0
for failure.

OCSP_request_onereq_count() returns the total number of B<OCSP_ONEREQ>
structures in B<req>.

OCSP_request_onereq_get0() returns a pointer to an B<OCSP_ONEREQ> structure
or B<NULL> if the index value is out or range.

=head1 NOTES

An OCSP request structure contains one or more B<OCSP_ONEREQ> structures
corresponding to each certificate.

OCSP_request_onereq_count() and OCSP_request_onereq_get0() are mainly used by
OCSP responders.

=head1 EXAMPLES

Create an B<OCSP_REQUEST> structure for certificate B<cert> with issuer
B<issuer>:

 OCSP_REQUEST *req;
 OCSP_ID *cid;

 req = OCSP_REQUEST_new();
 if (req == NULL)
    /* error */
 cid = OCSP_cert_to_id(EVP_sha1(), cert, issuer);
 if (cid == NULL)
    /* error */

 if (OCSP_REQUEST_add0_id(req, cid) == NULL)
    /* error */

 /* Do something with req, e.g. query responder */

 OCSP_REQUEST_free(req);

=head1 SEE ALSO

L<crypto(7)>,
L<OCSP_cert_to_id(3)>,
L<OCSP_request_add1_nonce(3)>,
L<OCSP_resp_find_status(3)>,
L<OCSP_response_status(3)>,
L<OCSP_sendreq_new(3)>

=head1 COPYRIGHT

Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.

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
L<https://www.openssl.org/source/license.html>.

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