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CURLOPT_PROXY_CAPATH(3) Library Functions Manual CURLOPT_PROXY_CAPATH(3) NAME CURLOPT_PROXY_CAPATH - directory holding HTTPS proxy CA certificates SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAPATH, char *capath); DESCRIPTION Pass a char pointer to a null-terminated string naming a directory holding multiple CA certificates to verify the HTTPS proxy with. If libcurl is built against OpenSSL, the certificate directory must be prepared using the OpenSSL c_rehash utility. This makes sense only when CURLOPT_PROXY_SSL_VER- IFYPEER(3) is enabled (which it is by default). The application does not have to keep the string around after setting this option. Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again and switch back to internal default. The default value for this can be figured out with CURLINFO_CAPATH(3). DEFAULT NULL PROTOCOLS This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. This option works only with the following TLS backends: GnuTLS, OpenSSL and mbedTLS EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); /* using an HTTPS proxy */ curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy.example:443"); curl_easy_setopt(curl, CURLOPT_PROXY_CAPATH, "/etc/cert-dir"); result = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.52.0 RETURN VALUE CURLE_OK if supported; or an error such as: CURLE_NOT_BUILT_IN - Not supported by the SSL backend CURLE_UNKNOWN_OPTION CURLE_OUT_OF_MEMORY SEE ALSO CURLOPT_CAINFO(3), CURLOPT_DEBUGFUNCTION(3), CURLOPT_PROXY_CAINFO(3), CUR- LOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_STDERR(3) libcurl 2026-06-11 CURLOPT_PROXY_CAPATH(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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