Various fixes required to allow SSL_write/SSL_read during early data

[openssl.git] / ssl / statem / statem.c

diff --git a/ssl/statem/statem.c b/ssl/statem/statem.c
index 10d794ede7fdb35dce999690e6f597e570cb73a4..8a251ea1e7ad4c6235f1374fa82b59c1b6ad4a8f 100644 (file)
--- a/ssl/statem/statem.c
+++ b/ssl/statem/statem.c
@@ -151,6 +151,37 @@ void ossl_statem_set_in_handshake(SSL *s, int inhand)
         s->statem.in_handshake--;
 }
 
+/* Are we in a sensible state to skip over unreadable early data? */
+int ossl_statem_skip_early_data(SSL *s)
+{
+    if (s->ext.early_data != SSL_EARLY_DATA_REJECTED)
+        return 0;
+
+    if (s->hello_retry_request) {
+        if (s->statem.hand_state != TLS_ST_SW_HELLO_RETRY_REQUEST)
+            return 0;
+    } else {
+        if (!s->server || s->statem.hand_state != TLS_ST_EARLY_DATA)
+            return 0;
+    }
+
+    return 1;
+}
+
+void ossl_statem_check_finish_init(SSL *s, int send)
+{
+    if (!s->server) {
+        if ((send && s->statem.hand_state == TLS_ST_PENDING_EARLY_DATA_END
+                  && s->early_data_state != SSL_EARLY_DATA_WRITING)
+                || (!send && s->statem.hand_state == TLS_ST_EARLY_DATA))
+            ossl_statem_set_in_init(s, 1);
+    } else {
+        if (s->early_data_state == SSL_EARLY_DATA_FINISHED_READING
+                && s->statem.hand_state == TLS_ST_EARLY_DATA)
+            ossl_statem_set_in_init(s, 1);
+    }
+}
+
 void ossl_statem_set_hello_verify_done(SSL *s)
 {
     s->statem.state = MSG_FLOW_UNINITED;
@@ -313,8 +344,7 @@ static int state_machine(SSL *s, int server)
                 goto end;
             }
 
-        if ((SSL_IS_FIRST_HANDSHAKE(s)
-                    && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING)
+        if ((SSL_in_before(s))
                 || s->renegotiate) {
             if (!tls_setup_handshake(s)) {
                 ossl_statem_set_error(s);
@@ -719,8 +749,17 @@ static SUB_STATE_RETURN write_state_machine(SSL *s)
             case WORK_FINISHED_STOP:
                 return SUB_STATE_END_HANDSHAKE;
             }
+            if (!get_construct_message_f(s, &pkt, &confunc, &mt)) {
+                ossl_statem_set_error(s);
+                return SUB_STATE_ERROR;
+            }
+            if (mt == SSL3_MT_DUMMY) {
+                /* Skip construction and sending. This isn't a "real" state */
+                st->write_state = WRITE_STATE_POST_WORK;
+                st->write_state_work = WORK_MORE_A;
+                break;
+            }
             if (!WPACKET_init(&pkt, s->init_buf)
-                    || !get_construct_message_f(s, &pkt, &confunc, &mt)
                     || !ssl_set_handshake_header(s, &pkt, mt)
                     || (confunc != NULL && !confunc(s, &pkt))
                     || !ssl_close_construct_packet(s, &pkt, mt)