From 1328f69d53f2f2e937696ea954c480412b018451 Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Fri, 7 Jul 2017 11:49:08 +0200 Subject: vtls: introduce curl_global_sslset() Let's add a compile time safe API to select an SSL backend. This function needs to be called *before* curl_global_init(), and can be called only once. Side note: we do not explicitly test that it is called before curl_global_init(), but we do verify that it is not called multiple times (even implicitly). If SSL is used before the function was called, it will use whatever the CURL_SSL_BACKEND environment variable says (or default to the first available SSL backend), and if a subsequent call to curl_global_sslset() disagrees with the previous choice, it will fail with CURLSSLSET_TOO_LATE. The function also accepts an "avail" parameter to point to a (read-only) NULL-terminated list of available backends. This comes in real handy if an application wants to let the user choose between whatever SSL backends the currently available libcurl has to offer: simply call curl_global_sslset(-1, NULL, &avail); which will return CURLSSLSET_UNKNOWN_BACKEND and populate the avail variable to point to the relevant information to present to the user. Just like with the HTTP/2 push functions, we have to add the function declaration of curl_global_sslset() function to the header file *multi.h* because VMS and OS/400 require a stable order of functions declared in include/curl/*.h (where the header files are sorted alphabetically). This looks a bit funny, but it cannot be helped. Signed-off-by: Johannes Schindelin --- docs/libcurl/symbols-in-versions | 3 +++ 1 file changed, 3 insertions(+) (limited to 'docs/libcurl') diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions index d3a2ff886..b9fdfe2a0 100644 --- a/docs/libcurl/symbols-in-versions +++ b/docs/libcurl/symbols-in-versions @@ -690,6 +690,9 @@ CURLSSLBACKEND_SCHANNEL 7.34.0 CURLSSLBACKEND_WOLFSSL 7.49.0 CURLSSLOPT_ALLOW_BEAST 7.25.0 CURLSSLOPT_NO_REVOKE 7.44.0 +CURLSSLSET_OK 7.56.0 +CURLSSLSET_UNKNOWN_BACKEND 7.56.0 +CURLSSLSET_TOO_LATE 7.56.0 CURLUSESSL_ALL 7.17.0 CURLUSESSL_CONTROL 7.17.0 CURLUSESSL_NONE 7.17.0 -- cgit v1.2.3