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CURLINFO_SSL_ENGINES(3) Library Functions Manual CURLINFO_SSL_ENGINES(3) NAME CURLINFO_SSL_ENGINES - an slist of OpenSSL crypto-engines SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_ENGINES, struct curl_slist **engine_list); DESCRIPTION Pass the address of a 'struct curl_slist *' to receive a linked-list of OpenSSL crypto-engines supported. Note that engines are normally imple- mented in separate dynamic libraries. Hence not all the returned engines may be available at runtime. NOTE: you must call curl_slist_free_all(3) on the list pointer once you are done with it, as libcurl does not free this data for you. PROTOCOLS This functionality affects all TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc. This option works only with the following TLS backends: OpenSSL EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; struct curl_slist *engines; result = curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines); if((result == CURLE_OK) && engines) { /* we have a list, free it when done using it */ curl_slist_free_all(engines); } curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.12.3 RETURN VALUE curl_easy_getinfo(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_SSLENGINE(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2026-06-11 CURLINFO_SSL_ENGINES(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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