NAME

       CURLOPT_PROXY_SSL_VERIFYPEER - verify the proxy's SSL certificate

SYNOPSIS

       #include <curl/curl.h>

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

DESCRIPTION

       Pass a long as parameter set to 1L to enable or 0L to disable.

       This  option tells curl to verifies the authenticity of the HTTPS proxy's certificate. A value of 1 means
       curl verifies; 0 (zero) means it doesn't.

       This is the proxy version of CURLOPT_SSL_VERIFYPEER(3) that's used for ordinary HTTPS servers.

       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 signatures,  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_PROXY_CAINFO(3)
       option or the CURLOPT_PROXY_CAPATH(3) option.

       When CURLOPT_PROXY_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_PROXY_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_PROXY_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 communicating with the correct end-point.

DEFAULT

       1

PROTOCOLS

       All

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_PROXY_SSL_VERIFYPEER, 1L);

         curl_easy_perform(curl);
       }

AVAILABILITY

       Added in 7.52.0

       If built TLS enabled.

RETURN VALUE

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

SEE ALSO

       CURLOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3),