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.\" **************************************************************************
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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 - 2015, 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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.SH DEFAULT
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Built-in system specific
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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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TODO
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.SH AVAILABILITY
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For SSL engines that don't support certificate files the CURLOPT_CAINFO option
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is ignored. Refer to https://curl.haxx.se/docs/ssl-compared.html
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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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