vtls: deduplicate some DISABLE_PROXY ifdefs

... in the code of gtls, nss, and openssl

Closes #5735

4 files changed, 36 insertions, 104 deletions

diff --git a/lib/vtls/gtls.c b/lib/vtls/gtls.c
index b09003303..ec3f8599b 100644
--- a/lib/vtls/gtls.c
+++ b/lib/vtls/gtls.c
@@ -399,15 +399,8 @@ gtls_connect_step1(struct connectdata *conn,
 #endif
   const char *prioritylist;
   const char *err = NULL;
-#ifndef CURL_DISABLE_PROXY
-  const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
-    conn->host.name;
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-#else
-  const char * const hostname = conn->host.name;
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-#endif
+  const char * const hostname = SSL_HOST_NAME();
+  long * const certverifyresult = &SSL_SET_OPTION_LVALUE(certverifyresult);
 
   if(connssl->state == ssl_connection_complete)
     /* to make us tolerant against being called more than once for the
@@ -839,15 +832,8 @@ gtls_connect_step3(struct connectdata *conn,
   unsigned int bits;
   gnutls_protocol_t version = gnutls_protocol_get_version(session);
 #endif
-#ifndef CURL_DISABLE_PROXY
-  const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
-    conn->host.name;
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-#else
-  const char * const hostname = conn->host.name;
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-#endif
+  const char * const hostname = SSL_HOST_NAME();
+  long * const certverifyresult = &SSL_SET_OPTION_LVALUE(certverifyresult);
 
   /* the name of the cipher suite used, e.g. ECDHE_RSA_AES_256_GCM_SHA384. */
   ptr = gnutls_cipher_suite_get_name(gnutls_kx_get(session),
@@ -1128,22 +1114,15 @@ gtls_connect_step3(struct connectdata *conn,
   }
 #endif
   if(!rc) {
-#ifndef CURL_DISABLE_PROXY
-    const char * const dispname = SSL_IS_PROXY() ?
-      conn->http_proxy.host.dispname : conn->host.dispname;
-#else
-    const char * const dispname = conn->host.dispname;
-#endif
-
     if(SSL_CONN_CONFIG(verifyhost)) {
       failf(data, "SSL: certificate subject name (%s) does not match "
-            "target host name '%s'", certname, dispname);
+            "target host name '%s'", certname, SSL_HOST_DISPNAME());
       gnutls_x509_crt_deinit(x509_cert);
       return CURLE_PEER_FAILED_VERIFICATION;
     }
     else
       infof(data, "\t common name: %s (does not match '%s')\n",
-            certname, dispname);
+            certname, SSL_HOST_DISPNAME());
   }
   else
     infof(data, "\t common name: %s (matched)\n", certname);
diff --git a/lib/vtls/nss.c b/lib/vtls/nss.c
index 2aed10d1b..d0988549d 100644
--- a/lib/vtls/nss.c
+++ b/lib/vtls/nss.c
@@ -1027,12 +1027,7 @@ static SECStatus BadCertHandler(void *arg, PRFileDesc *sock)
   CERTCertificate *cert;
 
   /* remember the cert verification result */
-#ifndef CURL_DISABLE_PROXY
-  if(SSL_IS_PROXY())
-    data->set.proxy_ssl.certverifyresult = err;
-  else
-#endif
-    data->set.ssl.certverifyresult = err;
+  SSL_SET_OPTION_LVALUE(certverifyresult) = err;
 
   if(err == SSL_ERROR_BAD_CERT_DOMAIN && !SSL_CONN_CONFIG(verifyhost))
     /* we are asked not to verify the host name */
@@ -1838,12 +1833,6 @@ static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
   CURLcode result;
   bool second_layer = FALSE;
   SSLVersionRange sslver_supported;
-#ifndef CURL_DISABLE_PROXY
-  const char *hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
-    conn->host.name;
-#else
-  const char *hostname = conn->host.name;
-#endif
 
   SSLVersionRange sslver = {
     SSL_LIBRARY_VERSION_TLS_1_0,  /* min */
@@ -1948,12 +1937,7 @@ static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
     goto error;
 
   /* not checked yet */
-#ifndef CURL_DISABLE_PROXY
-  if(SSL_IS_PROXY())
-    data->set.proxy_ssl.certverifyresult = 0;
-  else
-#endif
-    data->set.ssl.certverifyresult = 0;
+  SSL_SET_OPTION_LVALUE(certverifyresult) = 0;
 
   if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess)
     goto error;
@@ -2125,11 +2109,11 @@ static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
     goto error;
 
   /* propagate hostname to the TLS layer */
-  if(SSL_SetURL(backend->handle, hostname) != SECSuccess)
+  if(SSL_SetURL(backend->handle, SSL_HOST_NAME()) != SECSuccess)
     goto error;
 
   /* prevent NSS from re-using the session for a different hostname */
-  if(SSL_SetSockPeerID(backend->handle, hostname) != SECSuccess)
+  if(SSL_SetSockPeerID(backend->handle, SSL_HOST_NAME()) != SECSuccess)
     goto error;
 
   return CURLE_OK;
@@ -2148,18 +2132,6 @@ static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
   struct Curl_easy *data = conn->data;
   CURLcode result = CURLE_SSL_CONNECT_ERROR;
   PRUint32 timeout;
-#ifndef CURL_DISABLE_PROXY
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-  const char * const pinnedpubkey = SSL_IS_PROXY() ?
-              data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY] :
-              data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG];
-#else
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-  const char * const pinnedpubkey =
-              data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG];
-#endif
-
 
   /* check timeout situation */
   const timediff_t time_left = Curl_timeleft(data, NULL, TRUE);
@@ -2175,9 +2147,9 @@ static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
     if(PR_GetError() == PR_WOULD_BLOCK_ERROR)
       /* blocking direction is updated by nss_update_connecting_state() */
       return CURLE_AGAIN;
-    else if(*certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN)
+    else if(SSL_SET_OPTION(certverifyresult) == SSL_ERROR_BAD_CERT_DOMAIN)
       result = CURLE_PEER_FAILED_VERIFICATION;
-    else if(*certverifyresult != 0)
+    else if(SSL_SET_OPTION(certverifyresult) != 0)
       result = CURLE_PEER_FAILED_VERIFICATION;
     goto error;
   }
@@ -2205,7 +2177,7 @@ static CURLcode nss_do_connect(struct connectdata *conn, int sockindex)
     }
   }
 
-  result = cmp_peer_pubkey(connssl, pinnedpubkey);
+  result = cmp_peer_pubkey(connssl, SSL_PINNED_PUB_KEY());
   if(result)
     /* status already printed */
     goto error;
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 1b3ed665d..ffc0d6666 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -1582,16 +1582,8 @@ static CURLcode verifyhost(struct connectdata *conn, X509 *server_cert)
   CURLcode result = CURLE_OK;
   bool dNSName = FALSE; /* if a dNSName field exists in the cert */
   bool iPAddress = FALSE; /* if a iPAddress field exists in the cert */
-#ifndef CURL_DISABLE_PROXY
-  const char * const hostname = SSL_IS_PROXY() ?
-    conn->http_proxy.host.name : conn->host.name;
-  const char * const dispname = SSL_IS_PROXY() ?
-    conn->http_proxy.host.dispname : conn->host.dispname;
-#else
-  /* disabled proxy support */
-  const char * const hostname = conn->host.name;
-  const char * const dispname = conn->host.dispname;
-#endif
+  const char * const hostname = SSL_HOST_NAME();
+  const char * const dispname = SSL_HOST_DISPNAME();
 
 #ifdef ENABLE_IPV6
   if(conn->bits.ipv6_ip &&
@@ -2470,12 +2462,7 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
 
 #ifdef SSL_CTRL_SET_TLSEXT_HOSTNAME
   bool sni;
-#ifndef CURL_DISABLE_PROXY
-  const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
-    conn->host.name;
-#else
-  const char * const hostname = conn->host.name;
-#endif
+  const char * const hostname = SSL_HOST_NAME();
 
 #ifdef ENABLE_IPV6
   struct in6_addr addr;
@@ -2483,12 +2470,6 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
   struct in_addr addr;
 #endif
 #endif
-#ifndef CURL_DISABLE_PROXY
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-#else
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-#endif
   const long int ssl_version = SSL_CONN_CONFIG(version);
 #ifdef HAVE_OPENSSL_SRP
   const enum CURL_TLSAUTH ssl_authtype = SSL_SET_OPTION(authtype);
@@ -2511,7 +2492,7 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
   if(result)
     return result;
 
-  *certverifyresult = !X509_V_OK;
+  SSL_SET_OPTION_LVALUE(certverifyresult) = !X509_V_OK;
 
   /* check to see if we've been told to use an explicit SSL/TLS version */
 
@@ -3221,12 +3202,6 @@ static CURLcode ossl_connect_step2(struct connectdata *conn, int sockindex)
   struct Curl_easy *data = conn->data;
   int err;
   struct ssl_connect_data *connssl = &conn->ssl[sockindex];
-#ifndef CURL_DISABLE_PROXY
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-#else
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-#endif
   struct ssl_backend_data *backend = connssl->backend;
   DEBUGASSERT(ssl_connect_2 == connssl->connecting_state
               || ssl_connect_2_reading == connssl->connecting_state
@@ -3291,7 +3266,7 @@ static CURLcode ossl_connect_step2(struct connectdata *conn, int sockindex)
 
         lerr = SSL_get_verify_result(backend->handle);
         if(lerr != X509_V_OK) {
-          *certverifyresult = lerr;
+          SSL_SET_OPTION_LVALUE(certverifyresult) = lerr;
           msnprintf(error_buffer, sizeof(error_buffer),
                     "SSL certificate problem: %s",
                     X509_verify_cert_error_string(lerr));
@@ -3313,12 +3288,10 @@ static CURLcode ossl_connect_step2(struct connectdata *conn, int sockindex)
        * the SO_ERROR is also lost.
        */
       if(CURLE_SSL_CONNECT_ERROR == result && errdetail == 0) {
+        const char * const hostname = SSL_HOST_NAME();
 #ifndef CURL_DISABLE_PROXY
-        const char * const hostname = SSL_IS_PROXY() ?
-          conn->http_proxy.host.name : conn->host.name;
         const long int port = SSL_IS_PROXY() ? conn->port : conn->remote_port;
 #else
-        const char * const hostname = conn->host.name;
         const long int port = conn->remote_port;
 #endif
         char extramsg[80]="";
@@ -3773,12 +3746,6 @@ static CURLcode servercert(struct connectdata *conn,
   char error_buffer[256]="";
   char buffer[2048];
   const char *ptr;
-#ifndef CURL_DISABLE_PROXY
-  long * const certverifyresult = SSL_IS_PROXY() ?
-    &data->set.proxy_ssl.certverifyresult : &data->set.ssl.certverifyresult;
-#else
-  long * const certverifyresult = &data->set.ssl.certverifyresult;
-#endif
   BIO *mem = BIO_new(BIO_s_mem());
   struct ssl_backend_data *backend = connssl->backend;
 
@@ -3899,9 +3866,9 @@ static CURLcode servercert(struct connectdata *conn,
       X509_free(issuer);
     }
 
-    lerr = *certverifyresult = SSL_get_verify_result(backend->handle);
-
-    if(*certverifyresult != X509_V_OK) {
+    lerr = SSL_get_verify_result(backend->handle);
+    SSL_SET_OPTION_LVALUE(certverifyresult) = lerr;
+    if(lerr != X509_V_OK) {
       if(SSL_CONN_CONFIG(verifypeer)) {
         /* We probably never reach this, because SSL_connect() will fail
            and we return earlier if verifypeer is set? */
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index 1a0bb1865..b86bdbc1d 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -131,12 +131,26 @@ CURLcode Curl_none_md5sum(unsigned char *input, size_t inputlen,
                    CURL_SOCKET_BAD ? FIRSTSOCKET : SECONDARYSOCKET].state)
 #define SSL_SET_OPTION(var)                                             \
   (SSL_IS_PROXY() ? data->set.proxy_ssl.var : data->set.ssl.var)
+#define SSL_SET_OPTION_LVALUE(var)                                      \
+  (*(SSL_IS_PROXY() ? &data->set.proxy_ssl.var : &data->set.ssl.var))
 #define SSL_CONN_CONFIG(var)                                            \
   (SSL_IS_PROXY() ? conn->proxy_ssl_config.var : conn->ssl_config.var)
+#define SSL_HOST_NAME()                                                 \
+  (SSL_IS_PROXY() ? conn->http_proxy.host.name : conn->host.name)
+#define SSL_HOST_DISPNAME()                                             \
+  (SSL_IS_PROXY() ? conn->http_proxy.host.dispname : conn->host.dispname)
+#define SSL_PINNED_PUB_KEY() (SSL_IS_PROXY()                            \
+  ? data->set.str[STRING_SSL_PINNEDPUBLICKEY_PROXY]                     \
+  : data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG])
 #else
 #define SSL_IS_PROXY() FALSE
 #define SSL_SET_OPTION(var) data->set.ssl.var
+#define SSL_SET_OPTION_LVALUE(var) data->set.ssl.var
 #define SSL_CONN_CONFIG(var) conn->ssl_config.var
+#define SSL_HOST_NAME() conn->host.name
+#define SSL_HOST_DISPNAME() conn->host.dispname
+#define SSL_PINNED_PUB_KEY()                                            \
+  data->set.str[STRING_SSL_PINNEDPUBLICKEY_ORIG]
 #endif
 
 bool Curl_ssl_config_matches(struct ssl_primary_config *data,