vtls: use unified "supports" bitfield member in backends

... instead of previous separate struct fields, to make it easier to
extend and change individual backends without having to modify them all.

closes #2547

15 files changed, 53 insertions, 89 deletions

diff --git a/lib/setopt.c b/lib/setopt.c
index 913cd8ea0..af53ee3ef 100644
--- a/lib/setopt.c
+++ b/lib/setopt.c
@@ -1748,7 +1748,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * Set a SSL_CTX callback
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_ssl_ctx)
+    if(Curl_ssl->supports & SSLSUPP_SSL_CTX)
       data->set.ssl.fsslctx = va_arg(param, curl_ssl_ctx_callback);
     else
 #endif
@@ -1759,7 +1759,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * Set a SSL_CTX callback parameter pointer
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_ssl_ctx)
+    if(Curl_ssl->supports & SSLSUPP_SSL_CTX)
       data->set.ssl.fsslctxp = va_arg(param, void *);
     else
 #endif
@@ -1778,7 +1778,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
     break;
   case CURLOPT_CERTINFO:
 #ifdef USE_SSL
-    if(Curl_ssl->have_certinfo)
+    if(Curl_ssl->supports & SSLSUPP_CERTINFO)
       data->set.ssl.certinfo = (0 != va_arg(param, long)) ? TRUE : FALSE;
     else
 #endif
@@ -1790,7 +1790,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * Specify file name of the public key in DER format.
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_pinnedpubkey)
+    if(Curl_ssl->supports & SSLSUPP_PINNEDPUBKEY)
       result = Curl_setstropt(&data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG],
                               va_arg(param, char *));
     else
@@ -1803,7 +1803,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * Specify file name of the public key in DER format.
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_pinnedpubkey)
+    if(Curl_ssl->supports & SSLSUPP_PINNEDPUBKEY)
       result = Curl_setstropt(&data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY],
                               va_arg(param, char *));
     else
@@ -1831,7 +1831,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * certificates which have been prepared using openssl c_rehash utility.
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_ca_path)
+    if(Curl_ssl->supports & SSLSUPP_CA_PATH)
       /* This does not work on windows. */
       result = Curl_setstropt(&data->set.str[STRING_SSL_CAPATH_ORIG],
                               va_arg(param, char *));
@@ -1845,7 +1845,7 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option,
      * CA certificates which have been prepared using openssl c_rehash utility.
      */
 #ifdef USE_SSL
-    if(Curl_ssl->have_ca_path)
+    if(Curl_ssl->supports & SSLSUPP_CA_PATH)
       /* This does not work on windows. */
       result = Curl_setstropt(&data->set.str[STRING_SSL_CAPATH_PROXY],
                               va_arg(param, char *));
diff --git a/lib/url.c b/lib/url.c
index eb1fc2220..38f08b3c6 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -2740,7 +2740,7 @@ static CURLcode parse_proxy(struct Curl_easy *data,
     proxyptr = proxy; /* No xxx:// head: It's a HTTP proxy */
 
 #ifdef USE_SSL
-  if(!Curl_ssl->support_https_proxy)
+  if(!(Curl_ssl->supports & SSLSUPP_HTTPS_PROXY))
 #endif
     if(proxytype == CURLPROXY_HTTPS) {
       failf(data, "Unsupported proxy \'%s\', libcurl is built without the "
diff --git a/lib/version.c b/lib/version.c
index 1752e14e8..5b0d05a15 100644
--- a/lib/version.c
+++ b/lib/version.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -399,7 +399,7 @@ curl_version_info_data *curl_version_info(CURLversion stamp)
 #ifdef USE_SSL
   Curl_ssl_version(ssl_buffer, sizeof(ssl_buffer));
   version_info.ssl_version = ssl_buffer;
-  if(Curl_ssl->support_https_proxy)
+  if(Curl_ssl->supports & SSLSUPP_HTTPS_PROXY)
     version_info.features |= CURL_VERSION_HTTPS_PROXY;
   else
     version_info.features &= ~CURL_VERSION_HTTPS_PROXY;
diff --git a/lib/vtls/axtls.c b/lib/vtls/axtls.c
index 9294f49ed..5ed898b4f 100644
--- a/lib/vtls/axtls.c
+++ b/lib/vtls/axtls.c
@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2010, DirecTV, Contact: Eric Hu, <ehu@directv.com>.
- * Copyright (C) 2010 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2010 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -703,13 +703,7 @@ static void *Curl_axtls_get_internals(struct ssl_connect_data *connssl,
 
 const struct Curl_ssl Curl_ssl_axtls = {
   { CURLSSLBACKEND_AXTLS, "axtls" }, /* info */
-
-  0, /* have_ca_path */
-  0, /* have_certinfo */
-  0, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  0, /* support_https_proxy */
-
+  0, /* no fancy stuff */
   sizeof(struct ssl_backend_data),
 
   /*
diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index 491636dd5..b127dcca8 100644
--- a/lib/vtls/cyassl.c
+++ b/lib/vtls/cyassl.c
@@ -994,15 +994,10 @@ static void *Curl_cyassl_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_cyassl = {
   { CURLSSLBACKEND_WOLFSSL, "WolfSSL" }, /* info */
 
-  0, /* have_ca_path */
-  0, /* have_certinfo */
 #ifdef KEEP_PEER_CERT
-  1, /* have_pinnedpubkey */
-#else
-  0, /* have_pinnedpubkey */
+  SSLSUPP_PINNEDPUBKEY |
 #endif
-  1, /* have_ssl_ctx */
-  0, /* support_https_proxy */
+  SSLSUPP_SSL_CTX
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/darwinssl.c b/lib/vtls/darwinssl.c
index 0919f10dc..45fe49d82 100644
--- a/lib/vtls/darwinssl.c
+++ b/lib/vtls/darwinssl.c
@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2012 - 2017, Nick Zitzmann, <nickzman@gmail.com>.
- * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2012 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -3029,15 +3029,11 @@ static void *Curl_darwinssl_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_darwinssl = {
   { CURLSSLBACKEND_DARWINSSL, "darwinssl" }, /* info */
 
-  0, /* have_ca_path */
-  0, /* have_certinfo */
 #ifdef DARWIN_SSL_PINNEDPUBKEY
-  1, /* have_pinnedpubkey */
+  SSLSUPP_PINNEDPUBKEY,
 #else
-  0, /* have_pinnedpubkey */
+  0,
 #endif /* DARWIN_SSL_PINNEDPUBKEY */
-  0, /* have_ssl_ctx */
-  0, /* support_https_proxy */
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index afc90a859..a770565c1 100644
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -1353,12 +1353,8 @@ static void *Curl_gskit_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_gskit = {
   { CURLSSLBACKEND_GSKIT, "gskit" }, /* info */
 
-  0, /* have_ca_path */
-  1, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  /* TODO: convert to 1 and fix test #1014 (if need) */
-  0, /* support_https_proxy */
+  SSLSUPP_CERTINFO |
+  SSLSUPP_PINNEDPUBKEY
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/gtls.c b/lib/vtls/gtls.c
index 688e83807..207b0fd1b 100644
--- a/lib/vtls/gtls.c
+++ b/lib/vtls/gtls.c
@@ -1802,11 +1802,10 @@ static void *Curl_gtls_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_gnutls = {
   { CURLSSLBACKEND_GNUTLS, "gnutls" }, /* info */
 
-  1, /* have_ca_path */
-  1, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  1, /* support_https_proxy */
+  SSLSUPP_CA_PATH  |
+  SSLSUPP_CERTINFO |
+  SSLSUPP_PINNEDPUBKEY |
+  SSLSUPP_HTTPS_PROXY,
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/mbedtls.c b/lib/vtls/mbedtls.c
index e76e19b09..4ec9fa18e 100644
--- a/lib/vtls/mbedtls.c
+++ b/lib/vtls/mbedtls.c
@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
- * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2012 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -1049,11 +1049,9 @@ static void *Curl_mbedtls_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_mbedtls = {
   { CURLSSLBACKEND_MBEDTLS, "mbedtls" }, /* info */
 
-  1, /* have_ca_path */
-  0, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  1, /* have_ssl_ctx */
-  0, /* support_https_proxy */
+  SSLSUPP_CA_PATH |
+  SSLSUPP_PINNEDPUBKEY |
+  SSLSUPP_SSL_CTX,
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/nss.c b/lib/vtls/nss.c
index edbacc671..7cd450cda 100644
--- a/lib/vtls/nss.c
+++ b/lib/vtls/nss.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -2357,11 +2357,10 @@ static void *Curl_nss_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_nss = {
   { CURLSSLBACKEND_NSS, "nss" }, /* info */
 
-  1, /* have_ca_path */
-  1, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  1, /* support_https_proxy */
+  SSLSUPP_CA_PATH |
+  SSLSUPP_CERTINFO |
+  SSLSUPP_PINNEDPUBKEY |
+  SSLSUPP_HTTPS_PROXY,
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 80e9bf940..f6d647e1e 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -3724,11 +3724,11 @@ static void *Curl_ossl_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_openssl = {
   { CURLSSLBACKEND_OPENSSL, "openssl" }, /* info */
 
-  1, /* have_ca_path */
-  1, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  1, /* have_ssl_ctx */
-  1, /* support_https_proxy */
+  SSLSUPP_CA_PATH |
+  SSLSUPP_CERTINFO |
+  SSLSUPP_PINNEDPUBKEY |
+  SSLSUPP_SSL_CTX |
+  SSLSUPP_HTTPS_PROXY,
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/polarssl.c b/lib/vtls/polarssl.c
index 811cdc2fb..604cb4c86 100644
--- a/lib/vtls/polarssl.c
+++ b/lib/vtls/polarssl.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2012 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
  *
  * This software is licensed as described in the file COPYING, which
@@ -900,11 +900,8 @@ static void *Curl_polarssl_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_polarssl = {
   { CURLSSLBACKEND_POLARSSL, "polarssl" }, /* info */
 
-  1, /* have_ca_path */
-  0, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  0, /* support_https_proxy */
+  SSLSUPP_CA_PATH |
+  SSLSUPP_PINNEDPUBKEY,
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 01f6f6691..548f4e316 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -1923,11 +1923,8 @@ static void *Curl_schannel_get_internals(struct ssl_connect_data *connssl,
 const struct Curl_ssl Curl_ssl_schannel = {
   { CURLSSLBACKEND_SCHANNEL, "schannel" }, /* info */
 
-  0, /* have_ca_path */
-  1, /* have_certinfo */
-  1, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  0, /* support_https_proxy */
+  SSLSUPP_CERTINFO |
+  SSLSUPP_PINNEDPUBKEY
 
   sizeof(struct ssl_backend_data),
 
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index 1745fd882..ee5bc7a0a 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -211,7 +211,7 @@ ssl_connect_init_proxy(struct connectdata *conn, int sockindex)
      !conn->proxy_ssl[sockindex].use) {
     struct ssl_backend_data *pbdata;
 
-    if(!Curl_ssl->support_https_proxy)
+    if(!(Curl_ssl->supports & SSLSUPP_HTTPS_PROXY))
       return CURLE_NOT_BUILT_IN;
 
     /* The pointers to the ssl backend data, which is opaque here, are swapped
@@ -1131,13 +1131,7 @@ static void Curl_multissl_close(struct connectdata *conn, int sockindex)
 
 static const struct Curl_ssl Curl_ssl_multi = {
   { CURLSSLBACKEND_NONE, "multi" },  /* info */
-
-  0, /* have_ca_path */
-  0, /* have_certinfo */
-  0, /* have_pinnedpubkey */
-  0, /* have_ssl_ctx */
-  0, /* support_https_proxy */
-
+  0, /* supports nothing */
   (size_t)-1, /* something insanely large to be on the safe side */
 
   Curl_multissl_init,                /* init */
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index 5c3146ee9..e7b87c4d3 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -26,20 +26,19 @@
 struct connectdata;
 struct ssl_connect_data;
 
+#define SSLSUPP_CA_PATH      (1<<0) /* supports CAPATH */
+#define SSLSUPP_CERTINFO     (1<<1) /* supports CURLOPT_CERTINFO */
+#define SSLSUPP_PINNEDPUBKEY (1<<2) /* supports CURLOPT_PINNEDPUBLICKEY */
+#define SSLSUPP_SSL_CTX      (1<<3) /* supports CURLOPT_SSL_CTX */
+#define SSLSUPP_HTTPS_PROXY  (1<<4) /* supports access via HTTPS proxies */
+
 struct Curl_ssl {
   /*
    * This *must* be the first entry to allow returning the list of available
    * backends in curl_global_sslset().
    */
   curl_ssl_backend info;
-
-  unsigned have_ca_path:1;      /* supports CAPATH */
-  unsigned have_certinfo:1;     /* supports CURLOPT_CERTINFO */
-  unsigned have_pinnedpubkey:1; /* supports CURLOPT_PINNEDPUBLICKEY */
-  unsigned have_ssl_ctx:1;      /* supports CURLOPT_SSL_CTX_* */
-
-  unsigned support_https_proxy:1; /* supports access via HTTPS proxies */
-
+  unsigned int supports; /* bitfield, see above */
   size_t sizeof_ssl_backend_data;
 
   int (*init)(void);