CURLOPT_PROXY_SSL_OPTIONS

Section: curl_easy_setopt options (3)
Updated: January 23, 2020
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NAME

CURLOPT_PROXY_SSL_OPTIONS - set proxy SSL behavior options  

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_OPTIONS, long bitmask);  

DESCRIPTION

Pass a long with a bitmask to tell libcurl about specific SSL behaviors. Available bits:
CURLSSLOPT_ALLOW_BEAST
Tells libcurl to not attempt to use any workarounds for a security flaw in the SSL3 and TLS1.0 protocols. If this option isn't used or this bit is set to 0, the SSL layer libcurl uses may use a work-around for this flaw although it might cause interoperability problems with some (older) SSL implementations. WARNING: avoiding this work-around lessens the security, and by setting this option to 1 you ask for exactly that. This option is only supported for DarwinSSL, NSS and OpenSSL.
CURLSSLOPT_NO_REVOKE
Tells libcurl to disable certificate revocation checks for those SSL backends where such behavior is present. This option is only supported for Schannel (the native Windows SSL library), with an exception in the case of Windows' Untrusted Publishers blacklist which it seems can't be bypassed. (Added in 7.44.0)
CURLSSLOPT_NO_PARTIALCHAIN
Tells libcurl to not accept "partial" certificate chains, which it otherwise does by default. This option is only supported for OpenSSL and will fail the certificate verification if the chain ends with an intermediate certificate and not with a root cert. (Added in 7.68.0)
 

DEFAULT

0  

PROTOCOLS

All TLS-based protocols  

AVAILABLE

Added in 7.52.0  

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy");
  /* weaken TLS only for use with silly proxies */
  curl_easy_setopt(curl, CURLOPT_PROXY_SSL_OPTIONS, CURLSSLOPT_ALLOW_BEAST |
                   CURLSSLOPT_NO_REVOKE);
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}
 

RETURN VALUE

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

SEE ALSO

CURLOPT_PROXY_SSLVERSION(3), CURLOPT_PROXY_SSL_CIPHER_LIST(3), CURLOPT_SSLVERSION(3), CURLOPT_SSL_CIPHER_LIST(3),


 

Index

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
AVAILABLE
EXAMPLE
RETURN VALUE
SEE ALSO
LinuxReviews : manual page archive : man3