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1=pod
2
3=head1 NAME
4
5X509_load_http,
6X509_http_nbio,
7X509_CRL_load_http,
8X509_CRL_http_nbio
9- certificate and CRL loading functions
10
11=head1 SYNOPSIS
12
13 #include <openssl/x509.h>
14
15 X509 *X509_load_http(const char *url, BIO *bio, BIO *rbio, int timeout);
16 X509_CRL *X509_CRL_load_http(const char *url, BIO *bio, BIO *rbio, int timeout);
17
18 #define X509_http_nbio(url)
19 #define X509_CRL_http_nbio(url)
20
21=head1 DESCRIPTION
22
23X509_load_http() and X509_CRL_load_http() loads a certificate or a CRL,
24respectively, in ASN.1 format using HTTP from the given B<url>.
25
26If B<bio> is given and B<rbio> is NULL then this BIO is used instead of an
27interal one for connecting, writing the request, and reading the response.
28If both B<bio> and B<rbio> are given (which may be memory BIOs, for instance)
29then no explicit connection is attempted,
30B<bio> is used for writing the request, and B<rbio> for reading the response.
31
32If the B<timeout> parameter is > 0 this indicates the maximum number of seconds
33to wait until the transfer is complete.
34A value of 0 enables waiting indefinitely,
35while a value < 0 immediately leads to a timeout condition.
36
37X509_http_nbio() and X509_CRL_http_nbio() are macros for backward compatibility
38that have the same effect as the functions above but with infinite timeout
39and without the possiblity to specify custom BIOs.
40
41=head1 RETURN VALUES
42
43On success the function yield the loaded value, else NULL.
44Error conditions include connection/transfer timeout, parse errors, etc.
45
46=head1 SEE ALSO
47
48L<OSSL_HTTP_get_asn1(3)>
49
50=head1 HISTORY
51
52X509_load_http() and X509_CRL_load_http() were added in OpenSSL 3.0.
53
54=head1 COPYRIGHT
55
56Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
57
58Licensed under the Apache License 2.0 (the "License"). You may not use
59this file except in compliance with the License. You can obtain a copy
60in the file LICENSE in the source distribution or at
61L<https://www.openssl.org/source/license.html>.
62
63=cut