94 lines
2.4 KiB
Markdown
94 lines
2.4 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_PROXY_CAINFO
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_CAINFO (3)
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- CURLOPT_CAINFO_BLOB (3)
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- CURLOPT_CAPATH (3)
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- CURLOPT_PROXY_CAINFO_BLOB (3)
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- CURLOPT_PROXY_CAPATH (3)
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- CURLOPT_PROXY_SSL_VERIFYHOST (3)
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- CURLOPT_PROXY_SSL_VERIFYPEER (3)
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- CURLOPT_SSL_VERIFYHOST (3)
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- CURLOPT_SSL_VERIFYPEER (3)
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---
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# NAME
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CURLOPT_PROXY_CAINFO - path to proxy Certificate Authority (CA) bundle
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAINFO, char *path);
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~~~
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# DESCRIPTION
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This option is for connecting to an HTTPS proxy, not an HTTPS server.
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Pass a char pointer to a null-terminated string naming a file holding one or
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more certificates to verify the HTTPS proxy with.
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If CURLOPT_PROXY_SSL_VERIFYPEER(3) is zero and you avoid verifying the
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server's certificate, CURLOPT_PROXY_CAINFO(3) 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 CA
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certificate bundle is assumed to be stored, as established at build time.
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(iOS and macOS only) If curl is built against Secure Transport, then this
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option is supported for backward compatibility with other SSL engines, but it
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should not be set. If the option is not set, then curl uses the certificates
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in the system and user Keychain to verify the peer, which is the preferred
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method of verifying the peer's certificate chain.
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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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The default value for this can be figured out with CURLINFO_CAINFO(3).
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# DEFAULT
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Built-in system specific
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# PROTOCOLS
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Used with HTTPS proxy
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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/* using an HTTPS proxy */
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curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
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curl_easy_setopt(curl, CURLOPT_PROXY_CAINFO, "/etc/certs/cabundle.pem");
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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}
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~~~
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# AVAILABILITY
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Added in 7.52.0
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For TLS backends that do not support certificate files, the
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CURLOPT_PROXY_CAINFO(3) option is ignored. Refer to
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https://curl.se/docs/ssl-compared.html
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# 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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