Fix up a few places in the state machine that got missed with SSLfatal()
[openssl.git] / ssl / statem / extensions_srvr.c
index ebae44899a1952ce559fef56d09cfcfde70a60fa..ca1cef59a896ccaa1f1fd88eff8b6ae5c7db9949 100644 (file)
@@ -15,7 +15,7 @@
  * Parse the client's renegotiation binding and abort if it's not right
  */
 int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
-                               X509 *x, size_t chainidx, int *al)
+                               X509 *x, size_t chainidx)
 {
     unsigned int ilen;
     const unsigned char *data;
@@ -23,25 +23,22 @@ int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
     /* Parse the length byte */
     if (!PACKET_get_1(pkt, &ilen)
         || !PACKET_get_bytes(pkt, &data, ilen)) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
-               SSL_R_RENEGOTIATION_ENCODING_ERR);
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
+                 SSL_R_RENEGOTIATION_ENCODING_ERR);
         return 0;
     }
 
     /* Check that the extension matches */
     if (ilen != s->s3->previous_client_finished_len) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
-               SSL_R_RENEGOTIATION_MISMATCH);
-        *al = SSL_AD_HANDSHAKE_FAILURE;
+        SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
+                 SSL_R_RENEGOTIATION_MISMATCH);
         return 0;
     }
 
     if (memcmp(data, s->s3->previous_client_finished,
                s->s3->previous_client_finished_len)) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
-               SSL_R_RENEGOTIATION_MISMATCH);
-        *al = SSL_AD_HANDSHAKE_FAILURE;
+        SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_CTOS_RENEGOTIATE,
+                 SSL_R_RENEGOTIATION_MISMATCH);
         return 0;
     }
 
@@ -74,7 +71,7 @@ int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
  * - On session reconnect, the servername extension may be absent.
  */
 int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
-                               X509 *x, size_t chainidx, int *al)
+                               X509 *x, size_t chainidx)
 {
     unsigned int servname_type;
     PACKET sni, hostname;
@@ -82,7 +79,8 @@ int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
     if (!PACKET_as_length_prefixed_2(pkt, &sni)
         /* ServerNameList must be at least 1 byte long. */
         || PACKET_remaining(&sni) == 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -100,25 +98,31 @@ int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
     if (!PACKET_get_1(&sni, &servname_type)
         || servname_type != TLSEXT_NAMETYPE_host_name
         || !PACKET_as_length_prefixed_2(&sni, &hostname)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
     if (!s->hit) {
         if (PACKET_remaining(&hostname) > TLSEXT_MAXLEN_host_name) {
-            *al = TLS1_AD_UNRECOGNIZED_NAME;
+            SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME,
+                     SSL_F_TLS_PARSE_CTOS_SERVER_NAME,
+                     SSL_R_BAD_EXTENSION);
             return 0;
         }
 
         if (PACKET_contains_zero_byte(&hostname)) {
-            *al = TLS1_AD_UNRECOGNIZED_NAME;
+            SSLfatal(s, SSL_AD_UNRECOGNIZED_NAME,
+                     SSL_F_TLS_PARSE_CTOS_SERVER_NAME,
+                     SSL_R_BAD_EXTENSION);
             return 0;
         }
 
         OPENSSL_free(s->session->ext.hostname);
         s->session->ext.hostname = NULL;
         if (!PACKET_strndup(&hostname, &s->session->ext.hostname)) {
-            *al = TLS1_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SERVER_NAME,
+                     ERR_R_INTERNAL_ERROR);
             return 0;
         }
 
@@ -139,15 +143,56 @@ int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
     return 1;
 }
 
+int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx)
+{
+    unsigned int value;
+
+    if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) {
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN,
+                 SSL_R_BAD_EXTENSION);
+        return 0;
+    }
+
+    /* Received |value| should be a valid max-fragment-length code. */
+    if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) {
+        SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+                 SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN,
+                 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
+        return 0;
+    }
+
+    /*
+     * RFC 6066:  The negotiated length applies for the duration of the session
+     * including session resumptions.
+     * We should receive the same code as in resumed session !
+     */
+    if (s->hit && s->session->ext.max_fragment_len_mode != value) {
+        SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+                 SSL_F_TLS_PARSE_CTOS_MAXFRAGMENTLEN,
+                 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
+        return 0;
+    }
+
+    /*
+     * Store it in session, so it'll become binding for us
+     * and we'll include it in a next Server Hello.
+     */
+    s->session->ext.max_fragment_len_mode = value;
+    return 1;
+}
+
 #ifndef OPENSSL_NO_SRP
 int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                       size_t chainidx, int *al)
+                       size_t chainidx)
 {
     PACKET srp_I;
 
     if (!PACKET_as_length_prefixed_1(pkt, &srp_I)
             || PACKET_contains_zero_byte(&srp_I)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_SRP,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -156,7 +201,8 @@ int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
      * upon resumption. Instead, we MUST ignore the login.
      */
     if (!PACKET_strndup(&srp_I, &s->srp_ctx.login)) {
-        *al = SSL_AD_INTERNAL_ERROR;
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_SRP,
+                 ERR_R_INTERNAL_ERROR);
         return 0;
     }
 
@@ -166,13 +212,14 @@ int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
 #ifndef OPENSSL_NO_EC
 int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
-                                 X509 *x, size_t chainidx, int *al)
+                                 X509 *x, size_t chainidx)
 {
     PACKET ec_point_format_list;
 
     if (!PACKET_as_length_prefixed_1(pkt, &ec_point_format_list)
         || PACKET_remaining(&ec_point_format_list) == 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -180,7 +227,8 @@ int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
         if (!PACKET_memdup(&ec_point_format_list,
                            &s->session->ext.ecpointformats,
                            &s->session->ext.ecpointformats_len)) {
-            *al = SSL_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
             return 0;
         }
     }
@@ -190,13 +238,14 @@ int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
 #endif                          /* OPENSSL_NO_EC */
 
 int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
-                                  X509 *x, size_t chainidx, int *al)
+                                  X509 *x, size_t chainidx)
 {
     if (s->ext.session_ticket_cb &&
             !s->ext.session_ticket_cb(s, PACKET_data(pkt),
                                   PACKET_remaining(pkt),
                                   s->ext.session_ticket_cb_arg)) {
-        *al = SSL_AD_INTERNAL_ERROR;
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
         return 0;
     }
 
@@ -204,18 +253,20 @@ int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
 }
 
 int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                            size_t chainidx, int *al)
+                            size_t chainidx)
 {
     PACKET supported_sig_algs;
 
     if (!PACKET_as_length_prefixed_2(pkt, &supported_sig_algs)
             || PACKET_remaining(&supported_sig_algs) == 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
     if (!s->hit && !tls1_save_sigalgs(s, &supported_sig_algs)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_SIG_ALGS, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -224,7 +275,7 @@ int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
 #ifndef OPENSSL_NO_OCSP
 int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
-                                  X509 *x, size_t chainidx, int *al)
+                                  X509 *x, size_t chainidx)
 {
     PACKET responder_id_list, exts;
 
@@ -233,7 +284,8 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
         return 1;
 
     if (!PACKET_get_1(pkt, (unsigned int *)&s->ext.status_type)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -246,7 +298,8 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
     }
 
     if (!PACKET_get_length_prefixed_2 (pkt, &responder_id_list)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -258,7 +311,8 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
     if (PACKET_remaining(&responder_id_list) > 0) {
         s->ext.ocsp.ids = sk_OCSP_RESPID_new_null();
         if (s->ext.ocsp.ids == NULL) {
-            *al = SSL_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_MALLOC_FAILURE);
             return 0;
         }
     } else {
@@ -272,7 +326,8 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
 
         if (!PACKET_get_length_prefixed_2(&responder_id_list, &responder_id)
                 || PACKET_remaining(&responder_id) == 0) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
             return 0;
         }
 
@@ -281,26 +336,32 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
         id = d2i_OCSP_RESPID(NULL, &id_data,
                              (int)PACKET_remaining(&responder_id));
         if (id == NULL) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
             return 0;
         }
 
         if (id_data != PACKET_end(&responder_id)) {
             OCSP_RESPID_free(id);
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
+
             return 0;
         }
 
         if (!sk_OCSP_RESPID_push(s->ext.ocsp.ids, id)) {
             OCSP_RESPID_free(id);
-            *al = SSL_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+
             return 0;
         }
     }
 
     /* Read in request_extensions */
     if (!PACKET_as_length_prefixed_2(pkt, &exts)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -312,7 +373,8 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
         s->ext.ocsp.exts =
             d2i_X509_EXTENSIONS(NULL, &ext_data, (int)PACKET_remaining(&exts));
         if (s->ext.ocsp.exts == NULL || ext_data != PACKET_end(&exts)) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
             return 0;
         }
     }
@@ -323,7 +385,7 @@ int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
 
 #ifndef OPENSSL_NO_NEXTPROTONEG
 int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                       size_t chainidx, int *al)
+                       size_t chainidx)
 {
     /*
      * We shouldn't accept this extension on a
@@ -342,7 +404,7 @@ int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
  * value to send in the event of a failure. Returns: 1 on success, 0 on error.
  */
 int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                        size_t chainidx, int *al)
+                        size_t chainidx)
 {
     PACKET protocol_list, save_protocol_list, protocol;
 
@@ -351,7 +413,8 @@ int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
     if (!PACKET_as_length_prefixed_2(pkt, &protocol_list)
         || PACKET_remaining(&protocol_list) < 2) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -360,7 +423,8 @@ int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
         /* Protocol names can't be empty. */
         if (!PACKET_get_length_prefixed_1(&protocol_list, &protocol)
                 || PACKET_remaining(&protocol) == 0) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN,
+                     SSL_R_BAD_EXTENSION);
             return 0;
         }
     } while (PACKET_remaining(&protocol_list) != 0);
@@ -370,7 +434,8 @@ int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
     s->s3->alpn_proposed_len = 0;
     if (!PACKET_memdup(&save_protocol_list,
                        &s->s3->alpn_proposed, &s->s3->alpn_proposed_len)) {
-        *al = SSL_AD_INTERNAL_ERROR;
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_ALPN,
+                 ERR_R_INTERNAL_ERROR);
         return 0;
     }
 
@@ -379,7 +444,7 @@ int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
 #ifndef OPENSSL_NO_SRTP
 int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                            size_t chainidx, int *al)
+                            size_t chainidx)
 {
     STACK_OF(SRTP_PROTECTION_PROFILE) *srvr;
     unsigned int ct, mki_len, id;
@@ -393,9 +458,8 @@ int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
     /* Pull off the length of the cipher suite list  and check it is even */
     if (!PACKET_get_net_2(pkt, &ct) || (ct & 1) != 0
             || !PACKET_get_sub_packet(pkt, &subpkt, ct)) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP,
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP,
                SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
-        *al = SSL_AD_DECODE_ERROR;
         return 0;
     }
 
@@ -406,9 +470,8 @@ int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
     while (PACKET_remaining(&subpkt)) {
         if (!PACKET_get_net_2(&subpkt, &id)) {
-            SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP,
-                   SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP,
+                     SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
             return 0;
         }
 
@@ -432,16 +495,15 @@ int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
     /* Now extract the MKI value as a sanity check, but discard it for now */
     if (!PACKET_get_1(pkt, &mki_len)) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP,
-               SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP,
+                 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
         return 0;
     }
 
     if (!PACKET_forward(pkt, mki_len)
         || PACKET_remaining(pkt)) {
-        SSLerr(SSL_F_TLS_PARSE_CTOS_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_USE_SRTP,
+                 SSL_R_BAD_SRTP_MKI_VALUE);
         return 0;
     }
 
@@ -450,7 +512,7 @@ int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 #endif
 
 int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                       size_t chainidx, int *al)
+                       size_t chainidx)
 {
     if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC))
         s->ext.use_etm = 1;
@@ -464,7 +526,7 @@ int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
  * If a failure occurs then |*al| is set to an appropriate alert value.
  */
 int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
-                                 X509 *x, size_t chainidx, int *al)
+                                 X509 *x, size_t chainidx)
 {
 #ifndef OPENSSL_NO_TLS1_3
     PACKET psk_kex_modes;
@@ -472,7 +534,8 @@ int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
 
     if (!PACKET_as_length_prefixed_1(pkt, &psk_kex_modes)
             || PACKET_remaining(&psk_kex_modes) == 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK_KEX_MODES,
+                 SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -494,13 +557,13 @@ int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
  * If a failure occurs then |*al| is set to an appropriate alert value.
  */
 int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                             size_t chainidx, int *al)
+                             size_t chainidx)
 {
 #ifndef OPENSSL_NO_TLS1_3
     unsigned int group_id;
     PACKET key_share_list, encoded_pt;
-    const uint16_t *clntcurves, *srvrcurves;
-    size_t clnt_num_curves, srvr_num_curves;
+    const uint16_t *clntgroups, *srvrgroups;
+    size_t clnt_num_groups, srvr_num_groups;
     int found = 0;
 
     if (s->hit && (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE) == 0)
@@ -508,39 +571,29 @@ int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
     /* Sanity check */
     if (s->s3->peer_tmp != NULL) {
-        *al = SSL_AD_INTERNAL_ERROR;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
+                 ERR_R_INTERNAL_ERROR);
         return 0;
     }
 
     if (!PACKET_as_length_prefixed_2(pkt, &key_share_list)) {
-        *al = SSL_AD_DECODE_ERROR;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
+                 SSL_R_LENGTH_MISMATCH);
         return 0;
     }
 
-    /* Get our list of supported curves */
-    if (!tls1_get_curvelist(s, 0, &srvrcurves, &srvr_num_curves)) {
-        *al = SSL_AD_INTERNAL_ERROR;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
-        return 0;
-    }
-
-    /* Get the clients list of supported curves. */
-    if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) {
-        *al = SSL_AD_INTERNAL_ERROR;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
-        return 0;
-    }
-    if (clnt_num_curves == 0) {
+    /* Get our list of supported groups */
+    tls1_get_supported_groups(s, &srvrgroups, &srvr_num_groups);
+    /* Get the clients list of supported groups. */
+    tls1_get_peer_groups(s, &clntgroups, &clnt_num_groups);
+    if (clnt_num_groups == 0) {
         /*
          * This can only happen if the supported_groups extension was not sent,
          * because we verify that the length is non-zero when we process that
          * extension.
          */
-        *al = SSL_AD_MISSING_EXTENSION;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
-               SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION);
+        SSLfatal(s, SSL_AD_MISSING_EXTENSION, SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
+                 SSL_R_MISSING_SUPPORTED_GROUPS_EXTENSION);
         return 0;
     }
 
@@ -548,9 +601,8 @@ int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
         if (!PACKET_get_net_2(&key_share_list, &group_id)
                 || !PACKET_get_length_prefixed_2(&key_share_list, &encoded_pt)
                 || PACKET_remaining(&encoded_pt) == 0) {
-            *al = SSL_AD_DECODE_ERROR;
-            SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
-                   SSL_R_LENGTH_MISMATCH);
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
+                     SSL_R_LENGTH_MISMATCH);
             return 0;
         }
 
@@ -562,21 +614,20 @@ int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
             continue;
 
         /* Check if this share is in supported_groups sent from client */
-        if (!check_in_list(s, group_id, clntcurves, clnt_num_curves, 0)) {
-            *al = SSL_AD_ILLEGAL_PARAMETER;
-            SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
+        if (!check_in_list(s, group_id, clntgroups, clnt_num_groups, 0)) {
+            SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+                     SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
             return 0;
         }
 
         /* Check if this share is for a group we can use */
-        if (!check_in_list(s, group_id, srvrcurves, srvr_num_curves, 1)) {
+        if (!check_in_list(s, group_id, srvrgroups, srvr_num_groups, 1)) {
             /* Share not suitable */
             continue;
         }
 
         if ((s->s3->peer_tmp = ssl_generate_param_group(group_id)) == NULL) {
-            *al = SSL_AD_INTERNAL_ERROR;
-            SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_CTOS_KEY_SHARE,
                    SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
             return 0;
         }
@@ -586,8 +637,8 @@ int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
         if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
                 PACKET_data(&encoded_pt),
                 PACKET_remaining(&encoded_pt))) {
-            *al = SSL_AD_ILLEGAL_PARAMETER;
-            SSLerr(SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT);
+            SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+                     SSL_F_TLS_PARSE_CTOS_KEY_SHARE, SSL_R_BAD_ECPOINT);
             return 0;
         }
 
@@ -600,7 +651,7 @@ int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
 #ifndef OPENSSL_NO_EC
 int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
-                                    X509 *x, size_t chainidx, int *al)
+                                    X509 *x, size_t chainidx)
 {
     PACKET supported_groups_list;
 
@@ -608,7 +659,8 @@ int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
     if (!PACKET_as_length_prefixed_2(pkt, &supported_groups_list)
             || PACKET_remaining(&supported_groups_list) == 0
             || (PACKET_remaining(&supported_groups_list) % 2) != 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -619,7 +671,9 @@ int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
         if (!tls1_save_u16(&supported_groups_list,
                            &s->session->ext.supportedgroups,
                            &s->session->ext.supportedgroups_len)) {
-            *al = SSL_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_SUPPORTED_GROUPS,
+                     ERR_R_INTERNAL_ERROR);
             return 0;
         }
     }
@@ -629,11 +683,12 @@ int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
 #endif
 
 int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                       size_t chainidx, int *al)
+                       size_t chainidx)
 {
     /* The extension must always be empty */
     if (PACKET_remaining(pkt) != 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_EMS, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -644,15 +699,17 @@ int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
 
 int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
-                              X509 *x, size_t chainidx, int *al)
+                              X509 *x, size_t chainidx)
 {
     if (PACKET_remaining(pkt) != 0) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
     if (s->hello_retry_request) {
-        *al = SSL_AD_ILLEGAL_PARAMETER;
+        SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
+                 SSL_F_TLS_PARSE_CTOS_EARLY_DATA, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -660,7 +717,7 @@ int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
 }
 
 int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
-                       size_t chainidx, int *al)
+                       size_t chainidx)
 {
     PACKET identities, binders, binder;
     size_t binderoffset, hashsize;
@@ -677,7 +734,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
         return 1;
 
     if (!PACKET_get_length_prefixed_2(pkt, &identities)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR,
+                 SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION);
         return 0;
     }
 
@@ -687,7 +745,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
         if (!PACKET_get_length_prefixed_2(&identities, &identity)
                 || !PACKET_get_net_4(&identities, &ticket_agel)) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION);
             return 0;
         }
 
@@ -695,7 +754,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
                 && !s->psk_find_session_cb(s, PACKET_data(&identity),
                                            PACKET_remaining(&identity),
                                            &sess)) {
-            *al = SSL_AD_INTERNAL_ERROR;
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_PARSE_CTOS_PSK, SSL_R_BAD_EXTENSION);
             return 0;
         }
 
@@ -704,7 +764,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
             SSL_SESSION *sesstmp = ssl_session_dup(sess, 0);
 
             if (sesstmp == NULL) {
-                *al = SSL_AD_INTERNAL_ERROR;
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR);
                 return 0;
             }
             SSL_SESSION_free(sess);
@@ -727,7 +788,8 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
 
             if (ret == TICKET_FATAL_ERR_MALLOC
                     || ret == TICKET_FATAL_ERR_OTHER) {
-                *al = SSL_AD_INTERNAL_ERROR;
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR);
                 return 0;
             }
             if (ret == TICKET_NO_DECRYPT)
@@ -778,13 +840,15 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
     hashsize = EVP_MD_size(md);
 
     if (!PACKET_get_length_prefixed_2(pkt, &binders)) {
-        *al = SSL_AD_DECODE_ERROR;
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK,
+                 SSL_R_BAD_EXTENSION);
         goto err;
     }
 
     for (i = 0; i <= id; i++) {
         if (!PACKET_get_length_prefixed_1(&binders, &binder)) {
-            *al = SSL_AD_DECODE_ERROR;
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_CTOS_PSK,
+                     SSL_R_BAD_EXTENSION);
             goto err;
         }
     }
@@ -794,8 +858,7 @@ int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
                                  (const unsigned char *)s->init_buf->data,
                                  binderoffset, PACKET_data(&binder), NULL,
                                  sess, 0, ext) != 1) {
-        *al = SSL_AD_DECODE_ERROR;
-        SSLerr(SSL_F_TLS_PARSE_CTOS_PSK, ERR_R_INTERNAL_ERROR);
+        /* SSLfatal() already called */
         goto err;
     }
 
@@ -814,7 +877,7 @@ err:
  */
 EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
                                           unsigned int context, X509 *x,
-                                          size_t chainidx, int *al)
+                                          size_t chainidx)
 {
     if (!s->s3->send_connection_binding)
         return EXT_RETURN_NOT_SENT;
@@ -829,7 +892,8 @@ EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
                                s->s3->previous_server_finished_len)
             || !WPACKET_close(pkt)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_RENEGOTIATE,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -838,7 +902,7 @@ EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
 
 EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
                                           unsigned int context, X509 *x,
-                                          size_t chainidx, int *al)
+                                          size_t chainidx)
 {
     if (s->hit || s->servername_done != 1
             || s->session->ext.hostname == NULL)
@@ -846,7 +910,32 @@ EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
 
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
             || !WPACKET_put_bytes_u16(pkt, 0)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_SERVER_NAME,
+                 ERR_R_INTERNAL_ERROR);
+        return EXT_RETURN_FAIL;
+    }
+
+    return EXT_RETURN_SENT;
+}
+
+/* Add/include the server's max fragment len extension into ServerHello */
+EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
+                                             unsigned int context, X509 *x,
+                                             size_t chainidx)
+{
+    if (!USE_MAX_FRAGMENT_LENGTH_EXT(s->session))
+        return EXT_RETURN_NOT_SENT;
+
+    /*-
+     * 4 bytes for this extension type and extension length
+     * 1 byte for the Max Fragment Length code value.
+     */
+    if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length)
+        || !WPACKET_start_sub_packet_u16(pkt)
+        || !WPACKET_put_bytes_u8(pkt, s->session->ext.max_fragment_len_mode)
+        || !WPACKET_close(pkt)) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -856,7 +945,7 @@ EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
 #ifndef OPENSSL_NO_EC
 EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
                                             unsigned int context, X509 *x,
-                                            size_t chainidx, int *al)
+                                            size_t chainidx)
 {
     unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
     unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
@@ -873,7 +962,8 @@ EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
             || !WPACKET_start_sub_packet_u16(pkt)
             || !WPACKET_sub_memcpy_u8(pkt, plist, plistlen)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -884,7 +974,7 @@ EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
 #ifndef OPENSSL_NO_EC
 EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
                                                unsigned int context, X509 *x,
-                                               size_t chainidx, int *al)
+                                               size_t chainidx)
 {
     const uint16_t *groups;
     size_t numgroups, i, first = 1;
@@ -894,8 +984,10 @@ EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
         return EXT_RETURN_NOT_SENT;
 
     /* Get our list of supported groups */
-    if (!tls1_get_curvelist(s, 0, &groups, &numgroups) || numgroups == 0) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR);
+    tls1_get_supported_groups(s, &groups, &numgroups);
+    if (numgroups == 0) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -917,23 +1009,27 @@ EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
                            /* Sub-packet for supported_groups extension */
                         || !WPACKET_start_sub_packet_u16(pkt)
                         || !WPACKET_start_sub_packet_u16(pkt)) {
-                    SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
-                           ERR_R_INTERNAL_ERROR);
+                    SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                             SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
+                             ERR_R_INTERNAL_ERROR);
                     return EXT_RETURN_FAIL;
                 }
 
                 first = 0;
             }
             if (!WPACKET_put_bytes_u16(pkt, group)) {
-                    SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
-                           ERR_R_INTERNAL_ERROR);
+                    SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                             SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
+                             ERR_R_INTERNAL_ERROR);
                     return EXT_RETURN_FAIL;
                 }
         }
     }
 
     if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_SUPPORTED_GROUPS,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -943,7 +1039,7 @@ EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
 
 EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
                                              unsigned int context, X509 *x,
-                                             size_t chainidx, int *al)
+                                             size_t chainidx)
 {
     if (!s->ext.ticket_expected || !tls_use_ticket(s)) {
         s->ext.ticket_expected = 0;
@@ -952,7 +1048,8 @@ EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
 
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
             || !WPACKET_put_bytes_u16(pkt, 0)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -962,7 +1059,7 @@ EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
 #ifndef OPENSSL_NO_OCSP
 EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
                                              unsigned int context, X509 *x,
-                                             size_t chainidx, int *al)
+                                             size_t chainidx)
 {
     if (!s->ext.status_expected)
         return EXT_RETURN_NOT_SENT;
@@ -972,7 +1069,8 @@ EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
 
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
             || !WPACKET_start_sub_packet_u16(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -981,9 +1079,13 @@ EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
      * send back an empty extension, with the certificate status appearing as a
      * separate message
      */
-    if ((SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt))
-            || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
+    if (SSL_IS_TLS13(s) && !tls_construct_cert_status_body(s, pkt)) {
+       /* SSLfatal() already called */
+       return EXT_RETURN_FAIL; 
+    }
+    if (!WPACKET_close(pkt)) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -994,7 +1096,7 @@ EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
 #ifndef OPENSSL_NO_NEXTPROTONEG
 EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
                                              unsigned int context, X509 *x,
-                                             size_t chainidx, int *al)
+                                             size_t chainidx)
 {
     const unsigned char *npa;
     unsigned int npalen;
@@ -1010,8 +1112,9 @@ EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
     if (ret == SSL_TLSEXT_ERR_OK) {
         if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
                 || !WPACKET_sub_memcpy_u16(pkt, npa, npalen)) {
-            SSLerr(SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG,
-                   ERR_R_INTERNAL_ERROR);
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_CONSTRUCT_STOC_NEXT_PROTO_NEG,
+                     ERR_R_INTERNAL_ERROR);
             return EXT_RETURN_FAIL;
         }
         s->s3->npn_seen = 1;
@@ -1022,7 +1125,7 @@ EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
 #endif
 
 EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
-                                   X509 *x, size_t chainidx, int *al)
+                                   X509 *x, size_t chainidx)
 {
     if (s->s3->alpn_selected == NULL)
         return EXT_RETURN_NOT_SENT;
@@ -1035,7 +1138,8 @@ EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
                                       s->s3->alpn_selected_len)
             || !WPACKET_close(pkt)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_ALPN, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1045,7 +1149,7 @@ EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
 #ifndef OPENSSL_NO_SRTP
 EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt,
                                        unsigned int context, X509 *x,
-                                       size_t chainidx, int *al)
+                                       size_t chainidx)
 {
     if (s->srtp_profile == NULL)
         return EXT_RETURN_NOT_SENT;
@@ -1056,7 +1160,8 @@ EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt,
             || !WPACKET_put_bytes_u16(pkt, s->srtp_profile->id)
             || !WPACKET_put_bytes_u8(pkt, 0)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_USE_SRTP,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1065,7 +1170,7 @@ EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt,
 #endif
 
 EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
-                                  X509 *x, size_t chainidx, int *al)
+                                  X509 *x, size_t chainidx)
 {
     if (!s->ext.use_etm)
         return EXT_RETURN_NOT_SENT;
@@ -1084,7 +1189,8 @@ EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
 
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
             || !WPACKET_put_bytes_u16(pkt, 0)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_ETM, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_ETM,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1092,14 +1198,15 @@ EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
 }
 
 EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
-                                  X509 *x, size_t chainidx, int *al)
+                                  X509 *x, size_t chainidx)
 {
     if ((s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) == 0)
         return EXT_RETURN_NOT_SENT;
 
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
             || !WPACKET_put_bytes_u16(pkt, 0)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EMS, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EMS,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1108,7 +1215,7 @@ EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
 
 EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
                                         unsigned int context, X509 *x,
-                                        size_t chainidx, int *al)
+                                        size_t chainidx)
 {
 #ifndef OPENSSL_NO_TLS1_3
     unsigned char *encodedPoint;
@@ -1122,8 +1229,9 @@ EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
                     || !WPACKET_start_sub_packet_u16(pkt)
                     || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)
                     || !WPACKET_close(pkt)) {
-                SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
-                       ERR_R_INTERNAL_ERROR);
+                SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                         SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
+                         ERR_R_INTERNAL_ERROR);
                 return EXT_RETURN_FAIL;
             }
 
@@ -1132,8 +1240,8 @@ EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
 
         /* Must be resuming. */
         if (!s->hit || !tls13_generate_handshake_secret(s, NULL, 0)) {
-            *al = SSL_AD_INTERNAL_ERROR;
-            SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
             return EXT_RETURN_FAIL;
         }
         return EXT_RETURN_NOT_SENT;
@@ -1142,27 +1250,31 @@ EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
             || !WPACKET_start_sub_packet_u16(pkt)
             || !WPACKET_put_bytes_u16(pkt, s->s3->group_id)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
     skey = ssl_generate_pkey(ckey);
     if (skey == NULL) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
+                 ERR_R_MALLOC_FAILURE);
         return EXT_RETURN_FAIL;
     }
 
     /* Generate encoding of server key */
     encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(skey, &encodedPoint);
     if (encoded_pt_len == 0) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_EC_LIB);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
+                 ERR_R_EC_LIB);
         EVP_PKEY_free(skey);
         return EXT_RETURN_FAIL;
     }
 
     if (!WPACKET_sub_memcpy_u16(pkt, encodedPoint, encoded_pt_len)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE,
+                 ERR_R_INTERNAL_ERROR);
         EVP_PKEY_free(skey);
         OPENSSL_free(encodedPoint);
         return EXT_RETURN_FAIL;
@@ -1172,7 +1284,7 @@ EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
     /* This causes the crypto state to be updated based on the derived keys */
     s->s3->tmp.pkey = skey;
     if (ssl_derive(s, skey, ckey, 1) == 0) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
+        /* SSLfatal() already called */
         return EXT_RETURN_FAIL;
     }
 #endif
@@ -1182,7 +1294,7 @@ EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
 
 EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
                                             unsigned int context, X509 *x,
-                                            size_t chainidx, int *al)
+                                            size_t chainidx)
 {
     const unsigned char cryptopro_ext[36] = {
         0xfd, 0xe8,         /* 65000 */
@@ -1199,7 +1311,8 @@ EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
         return EXT_RETURN_NOT_SENT;
 
     if (!WPACKET_memcpy(pkt, cryptopro_ext, sizeof(cryptopro_ext))) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_CRYPTOPRO_BUG, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1208,7 +1321,7 @@ EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
 
 EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
                                          unsigned int context, X509 *x,
-                                         size_t chainidx, int *al)
+                                         size_t chainidx)
 {
     if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) {
         if (s->max_early_data == 0)
@@ -1218,7 +1331,8 @@ EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
                 || !WPACKET_start_sub_packet_u16(pkt)
                 || !WPACKET_put_bytes_u32(pkt, s->max_early_data)
                 || !WPACKET_close(pkt)) {
-            SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR);
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                     SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR);
             return EXT_RETURN_FAIL;
         }
 
@@ -1231,7 +1345,8 @@ EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
     if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
             || !WPACKET_start_sub_packet_u16(pkt)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_STOC_EARLY_DATA,
+                 ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }
 
@@ -1239,7 +1354,7 @@ EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
 }
 
 EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
-                                  X509 *x, size_t chainidx, int *al)
+                                  X509 *x, size_t chainidx)
 {
     if (!s->hit)
         return EXT_RETURN_NOT_SENT;
@@ -1248,7 +1363,8 @@ EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
             || !WPACKET_start_sub_packet_u16(pkt)
             || !WPACKET_put_bytes_u16(pkt, s->session->ext.tick_identity)
             || !WPACKET_close(pkt)) {
-        SSLerr(SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR);
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_TLS_CONSTRUCT_STOC_PSK, ERR_R_INTERNAL_ERROR);
         return EXT_RETURN_FAIL;
     }