mirror of
https://github.com/moparisthebest/curl
synced 2024-12-25 09:38:54 -05:00
a0f3eaf25d
- Ignore X509_R_CERT_ALREADY_IN_HASH_TABLE errors in the CTX callback since it's possible the cert may have already been loaded by libcurl. - Remove the EXAMPLE code in the CURLOPT_SSL_CTX_FUNCTION.3 doc. Instead have it direct the reader to this cacertinmem.c example. - Fix the CA certificate to use the right CA for example.com, Digicert. Bug: https://curl.haxx.se/mail/lib-2017-12/0057.html Reported-by: Thomas van Hesteren Closes https://github.com/curl/curl/pull/2182
79 lines
3.4 KiB
Groff
79 lines
3.4 KiB
Groff
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
.\" *
|
|
.\" * This software is licensed as described in the file COPYING, which
|
|
.\" * you should have received as part of this distribution. The terms
|
|
.\" * are also available at https://curl.haxx.se/docs/copyright.html.
|
|
.\" *
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
|
.\" *
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
.\" * KIND, either express or implied.
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.\"
|
|
.TH CURLOPT_SSL_CTX_FUNCTION 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
|
|
.SH NAME
|
|
CURLOPT_SSL_CTX_FUNCTION \- SSL context callback for OpenSSL, wolfSSL/CyaSSL or mbedTLS
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode ssl_ctx_callback(CURL *curl, void *ssl_ctx, void *userptr);
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_CTX_FUNCTION,
|
|
ssl_ctx_callback);
|
|
.SH DESCRIPTION
|
|
This option only works for libcurl powered by OpenSSL, wolfSSL/CyaSSL or
|
|
mbedTLS. If libcurl was built against another SSL library this functionality is
|
|
absent.
|
|
|
|
Pass a pointer to your callback function, which should match the prototype
|
|
shown above.
|
|
|
|
This callback function gets called by libcurl just before the initialization
|
|
of an SSL connection after having processed all other SSL related options to
|
|
give a last chance to an application to modify the behaviour of the SSL
|
|
initialization. The \fIssl_ctx\fP parameter is actually a pointer to the SSL
|
|
library's \fISSL_CTX\fP for OpenSSL or wolfSSL/CyaSSL, and a pointer to
|
|
\fImbedtls_ssl_config\fP for mbedTLS. If an error is returned from the callback
|
|
no attempt to establish a connection is made and the perform operation will
|
|
return the callback's error code. Set the \fIuserptr\fP argument with the
|
|
\fICURLOPT_SSL_CTX_DATA(3)\fP option.
|
|
|
|
This function will get called on all new connections made to a server, during
|
|
the SSL negotiation. The \fIssl_ctx\fP will point to a newly initialized object
|
|
each time, but note the pointer may be the same as from a prior call.
|
|
|
|
To use this properly, a non-trivial amount of knowledge of your SSL library is
|
|
necessary. For example, you can use this function to call library-specific
|
|
callbacks to add additional validation code for certificates, and even to
|
|
change the actual URI of a HTTPS request.
|
|
.SH DEFAULT
|
|
NULL
|
|
.SH PROTOCOLS
|
|
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
|
|
.SH EXAMPLE
|
|
See cacertinmem.c in docs/examples directory for usage example.
|
|
|
|
https://curl.haxx.se/libcurl/c/cacertinmem.html
|
|
.SH AVAILABILITY
|
|
Added in 7.11.0 for OpenSSL. Added in 7.42.0 for wolfSSL/CyaSSL. Added in
|
|
7.54.0 for mbedTLS. Other SSL backends not supported.
|
|
.SH RETURN VALUE
|
|
CURLE_OK if supported; or an error such as:
|
|
|
|
CURLE_NOT_BUILT_IN - Not supported by the SSL backend
|
|
|
|
CURLE_UNKNOWN_OPTION
|
|
.SH "SEE ALSO"
|
|
.BR CURLOPT_SSL_CTX_DATA "(3), " CURLOPT_SSL_VERIFYPEER "(3), "
|