openssl: stop checking for `OPENSSL_NO_TLSEXT` macro

The macro has been deleted upstream and never defined in OpenSSL 1.1.0+:
https://github.com/openssl/openssl/commit/e481f9b90b164fd1053015d1c4e0a0d92076d7a8

BoringSSL and LibreSSL deleted the last uses in 2014:
https://github.com/google/boringssl/commit/6dbd73db5d58ec44304266012d23ff8d297eca55
https://github.com/libressl/openbsd/commit/7b2f3298f7eb7ce5cfd1c3eb55b1ecc89118f52c

Also:
- drop internal guard `HAS_ALPN_OPENSSL`. It's always set.

Follow-up to 69c89bf3d3137fcbb2b8bc57233182adcf1e2817 #18330

Closes #20129

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index f33d1e9a2705d7738ca30ebb5b1a96864475fe09..45480778eb5dc80a88a4b50a7d7a8d139e8915c1 100644 (file)
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2231,7 +2231,7 @@ static CURLcode ossl_verifyhost(struct Curl_easy *data,
   return result;
 }
 
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP)
+#ifndef OPENSSL_NO_OCSP
 static CURLcode verifystatus(struct Curl_cfilter *cf,
                              struct Curl_easy *data,
                              struct ossl_ctx *octx)
@@ -2591,11 +2591,6 @@ static void ossl_trace(int direction, int ssl_ver, int content_type,
   (void)ssl;
 }
 
-/* Check for ALPN support. */
-#ifndef OPENSSL_NO_TLSEXT
-#  define HAS_ALPN_OPENSSL
-#endif
-
 static CURLcode
 ossl_set_ssl_version_min_max(struct Curl_cfilter *cf, SSL_CTX *ctx,
                              unsigned int ssl_version_min)
@@ -3424,7 +3419,6 @@ ossl_init_session_and_alpns(struct ossl_ctx *octx,
     Curl_ssl_scache_return(cf, data, peer->scache_key, scs);
   }
 
-#ifdef HAS_ALPN_OPENSSL
   if(alpns.count) {
     struct alpn_proto_buf proto;
     memset(&proto, 0, sizeof(proto));
@@ -3438,7 +3432,6 @@ ossl_init_session_and_alpns(struct ossl_ctx *octx,
       return CURLE_SSL_CONNECT_ERROR;
     }
   }
-#endif
 
   return CURLE_OK;
 }
@@ -3593,7 +3586,7 @@ static CURLcode ossl_init_ssl(struct ossl_ctx *octx,
 
   SSL_set_app_data(octx->ssl, ssl_user_data);
 
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP)
+#ifndef OPENSSL_NO_OCSP
   if(Curl_ssl_cf_get_primary_config(cf)->verifystatus)
     SSL_set_tlsext_status_type(octx->ssl, TLSEXT_STATUSTYPE_ocsp);
 #endif
@@ -4074,14 +4067,13 @@ static CURLcode ossl_connect_step1(struct Curl_cfilter *cf,
   SSL_set_bio(octx->ssl, bio, bio);
 #endif
 
-#ifdef HAS_ALPN_OPENSSL
   if(connssl->alpn && (connssl->state != ssl_connection_deferred)) {
     struct alpn_proto_buf proto;
     memset(&proto, 0, sizeof(proto));
     Curl_alpn_to_proto_str(&proto, connssl->alpn);
     infof(data, VTLS_INFOF_ALPN_OFFER_1STR, proto.data);
   }
-#endif
+
   connssl->connecting_state = ssl_connect_2;
   return CURLE_OK;
 }
@@ -4364,7 +4356,6 @@ static CURLcode ossl_connect_step2(struct Curl_cfilter *cf,
     }
 #endif /* HAVE_SSL_SET1_ECH_CONFIG_LIST && !HAVE_BORINGSSL_LIKE */
 
-#ifdef HAS_ALPN_OPENSSL
     /* Sets data and len to negotiated protocol, len is 0 if no protocol was
      * negotiated
      */
@@ -4375,7 +4366,6 @@ static CURLcode ossl_connect_step2(struct Curl_cfilter *cf,
 
       return Curl_alpn_set_negotiated(cf, data, connssl, neg_protocol, len);
     }
-#endif
 
     return CURLE_OK;
   }
@@ -4746,8 +4736,7 @@ CURLcode Curl_ossl_check_peer_cert(struct Curl_cfilter *cf,
   long ossl_verify;
   X509 *server_cert;
   bool verified = FALSE;
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP) && \
-  defined(USE_APPLE_SECTRUST)
+#if !defined(OPENSSL_NO_OCSP) && defined(USE_APPLE_SECTRUST)
   bool sectrust_verified = FALSE;
 #endif
 
@@ -4802,7 +4791,7 @@ CURLcode Curl_ossl_check_peer_cert(struct Curl_cfilter *cf,
     if(verified) {
       infof(data, "SSL certificate verified via Apple SecTrust.");
       ssl_config->certverifyresult = X509_V_OK;
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP)
+#ifndef OPENSSL_NO_OCSP
       sectrust_verified = TRUE;
 #endif
     }
@@ -4820,7 +4809,7 @@ CURLcode Curl_ossl_check_peer_cert(struct Curl_cfilter *cf,
     infof(data, " SSL certificate verification failed, continuing anyway!");
   }
 
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP)
+#ifndef OPENSSL_NO_OCSP
   if(conn_config->verifystatus &&
 #ifdef USE_APPLE_SECTRUST
      !sectrust_verified && /* already verified via apple sectrust, cannot
@@ -5401,7 +5390,7 @@ static CURLcode ossl_sha256sum(const unsigned char *tmp, /* input */
 
 static bool ossl_cert_status_request(void)
 {
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_OCSP)
+#ifndef OPENSSL_NO_OCSP
   return TRUE;
 #else
   return FALSE;