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curl/docs/libcurl/opts/CURLOPT_DOH_SSL_VERIFYSTATUS.3
Jay Satiro 53022e1893 doh: add options to disable ssl verification
- New libcurl options CURLOPT_DOH_SSL_VERIFYHOST,
  CURLOPT_DOH_SSL_VERIFYPEER and CURLOPT_DOH_SSL_VERIFYSTATUS do the
  same as their respective counterparts.

- New curl tool options --doh-insecure and --doh-cert-status do the same
  as their respective counterparts.

Prior to this change DOH SSL certificate verification settings for
verifyhost and verifypeer were supposed to be inherited respectively
from CURLOPT_SSL_VERIFYHOST and CURLOPT_SSL_VERIFYPEER, but due to a bug
were not. As a result DOH verification remained at the default, ie
enabled, and it was not possible to disable. This commit changes
behavior so that the DOH verification settings are independent and not
inherited.

Ref: https://github.com/curl/curl/pull/4579#issuecomment-554723676

Fixes https://github.com/curl/curl/issues/4578
Closes https://github.com/curl/curl/pull/6597
2021-02-14 18:20:48 -05:00

70 lines
2.6 KiB
Groff

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.TH CURLOPT_DOH_SSL_VERIFYSTATUS 3 "11 Feb 2021" "libcurl 7.76.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_DOH_SSL_VERIFYSTATUS \- verify the DOH SSL certificate's status
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_SSL_VERIFYSTATUS, long verify);
.SH DESCRIPTION
Pass a long as parameter set to 1 to enable or 0 to disable.
This option determines whether libcurl verifies the status of the DOH
(DNS-over-HTTPS) server cert using the "Certificate Status Request" TLS
extension (aka. OCSP stapling).
This option is the DOH equivalent of \fICURLOPT_SSL_VERIFYSTATUS(3)\fP and
only affects requests to the DOH server.
Note that if this option is enabled but the server does not support the TLS
extension, the verification will fail.
.SH DEFAULT
0
.SH PROTOCOLS
DOH
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://cloudflare-dns.com/dns-query");
/* Ask for OCSP stapling when verifying the DOH server */
curl_easy_setopt(curl, CURLOPT_DOH_SSL_VERIFYSTATUS, 1L);
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.76.0. This option is currently only supported by the OpenSSL, GnuTLS
and NSS TLS backends.
.SH RETURN VALUE
Returns CURLE_OK if OCSP stapling is supported by the SSL backend, otherwise
returns CURLE_NOT_BUILT_IN.
.SH "SEE ALSO"
.BR CURLOPT_DOH_SSL_VERIFYHOST "(3), "
.BR CURLOPT_DOH_SSL_VERIFYPEER "(3), "
.BR CURLOPT_SSL_VERIFYSTATUS "(3), "