mirror of
https://github.com/moparisthebest/curl
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027c065f3c
Clarify the functionality when built to use Schannel and Secure Transport and stop calling it the "recommended" or "preferred" way and instead rather call it the default. Removed the reference to the ssl comparison table as it isn't necessary. Reported-by: Richard Alcock Bug: https://curl.haxx.se/mail/lib-2019-06/0019.html Closes #4005
84 lines
3.6 KiB
Groff
84 lines
3.6 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.haxx.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_CAINFO 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_CAINFO \- path to Certificate Authority (CA) bundle
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.SH SYNOPSIS
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO, char *path);
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.SH DESCRIPTION
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Pass a char * to a zero terminated string naming a file holding one or more
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certificates to verify the peer with.
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If \fICURLOPT_SSL_VERIFYPEER(3)\fP is zero and you avoid verifying the
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server's certificate, \fICURLOPT_CAINFO(3)\fP need not even indicate an
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accessible file.
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This option is by default set to the system path where libcurl's cacert bundle
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is assumed to be stored, as established at build time.
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If curl is built against the NSS SSL library, the NSS PEM PKCS#11 module
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(libnsspem.so) needs to be available for this option to work properly.
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Starting with curl-7.55.0, if both \fICURLOPT_CAINFO(3)\fP and
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\fICURLOPT_CAPATH(3)\fP are unset, NSS-linked libcurl tries to load
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libnssckbi.so, which contains a more comprehensive set of trust information
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than supported by nss-pem, because libnssckbi.so also includes information
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about distrusted certificates.
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(iOS and macOS) When curl uses Secure Transport this option is supported. If
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the option is not set, then curl will use the certificates in the system and
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user Keychain to verify the peer.
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(Schannel) This option is supported for Schannel in Windows 7 or later but we
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recommend not using it until Windows 8 since it works better starting then.
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If the option is not set, then curl will use the certificates in the Windows'
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store of root certificates (the default for Schannel).
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The application does not have to keep the string around after setting this
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option.
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.SH DEFAULT
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Built-in system specific. When curl is built with Secure Transport or
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Schannel, this option is not set by default.
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.SH PROTOCOLS
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All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
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.SH EXAMPLE
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.nf
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
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ret = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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.fi
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.SH AVAILABILITY
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For the SSL engines that don't support certificate files the CURLOPT_CAINFO
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option is ignored. Schannel support added in libcurl 7.60.
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
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CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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.SH "SEE ALSO"
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.BR CURLOPT_CAPATH "(3), "
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.BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), "
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