CURLOPT_SSL_VERIFYPEER(3)				     curl_easy_setopt options					 CURLOPT_SSL_VERIFYPEER(3)

NAME

       CURLOPT_SSL_VERIFYPEER - verify the peer's SSL certificate

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_VERIFYPEER, long verify);

DESCRIPTION

       Pass a long as parameter to enable or disable.

       This  option  determines whether curl verifies the authenticity of the peer's certificate. A value of 1 means curl verifies; 0 (zero) means
       it doesn't.

       When negotiating a TLS or SSL connection, the server sends a certificate indicating its identity.  Curl verifies whether the certificate is
       authentic,  i.e.  that  you  can trust that the server is who the certificate says it is.  This trust is based on a chain of digital signa-
       tures, rooted in certification authority (CA) certificates you supply.  curl uses a default bundle of CA certificates (the path for that is
       determined at build time) and you can specify alternate certificates with the CURLOPT_CAINFO(3) option or the CURLOPT_CAPATH(3) option.

       When  CURLOPT_SSL_VERIFYPEER(3)	is  enabled,  and the verification fails to prove that the certificate is authentic, the connection fails.
       When the option is zero, the peer certificate verification succeeds regardless.

       Authenticating the certificate is not enough to be sure about the server. You typically also want to ensure that the server is  the  server
       you  mean  to be talking to.  Use CURLOPT_SSL_VERIFYHOST(3) for that. The check that the host name in the certificate is valid for the host
       name you're connecting to is done independently of the CURLOPT_SSL_VERIFYPEER(3) option.

       WARNING: disabling verification of the certificate allows bad guys to man-in-the-middle the communication without you knowing it. Disabling
       verification makes the communication insecure. Just having encryption on a transfer is not enough as you cannot be sure that you are commu-
       nicating with the correct end-point.

DEFAULT

       By default, curl assumes a value of 1.

PROTOCOLS

       All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
	 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

	 /* Set the default value: strict certificate check please */
	 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);

	 curl_easy_perform(curl);
       }

AVAILABILITY

       If built TLS enabled.

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_SSL_VERIFYHOST(3), CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_SSL_VERIFYHOST(3),

libcurl 7.54.0							 February 09, 2017					 CURLOPT_SSL_VERIFYPEER(3)