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Add basic TLSv1.3 cookie support
[openssl.git] / ssl / statem / statem_locl.h
diff --git a/ssl/statem/statem_locl.h b/ssl/statem/statem_locl.h
index 8079f30a936b104ebc465507ef7c2f24db8824b2..68160c9bc7276d098730aa6536fcfaf62fe64484 100644 (file)
--- a/ssl/statem/statem_locl.h
+++ b/ssl/statem/statem_locl.h
@@ -19,13 +19,18 @@
 /* The spec allows for a longer length than this, but we limit it */
 #define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
 #define SERVER_HELLO_MAX_LENGTH         20000
+#define HELLO_RETRY_REQUEST_MAX_LENGTH  20000
 #define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
 #define SERVER_KEY_EXCH_MAX_LENGTH      102400
 #define SERVER_HELLO_DONE_MAX_LENGTH    0
+#define KEY_UPDATE_MAX_LENGTH           1
 #define CCS_MAX_LENGTH                  1
 /* Max should actually be 36 but we are generous */
 #define FINISHED_MAX_LENGTH             64
 
+/* The maximum number of incoming KeyUpdate messages we will accept */
+#define MAX_KEY_UPDATE_MESSAGES     32
+
 /* Extension context codes */
 /* This extension is only allowed in TLS */
 #define EXT_TLS_ONLY                        0x0001
@@ -48,6 +53,9 @@
 #define EXT_TLS1_3_CERTIFICATE              0x0800
 #define EXT_TLS1_3_NEW_SESSION_TICKET       0x1000
 
+/* Dummy message type */
+#define SSL3_MT_DUMMY   -1
+
 /* Message processing return codes */
 typedef enum {
     /* Something bad happened */
@@ -68,6 +76,9 @@ int statem_flush(SSL *s);
 
 typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
 
+int check_in_list(SSL *s, unsigned int group_id, const unsigned char *groups,
+                  size_t num_groups, int checkallow);
+
 /*
  * TLS/DTLS client state machine functions
  */
@@ -107,6 +118,8 @@ __owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 __owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
 
 __owur int tls_construct_finished(SSL *s, WPACKET *pkt);
+__owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
 __owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs);
 __owur WORK_STATE dtls_wait_for_dry(SSL *s);
 
@@ -157,7 +170,7 @@ __owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
 /* Extension processing */
 
 __owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
-                                  RAW_EXTENSION **res, int *al);
+                                  RAW_EXTENSION **res, int *al, size_t *len);
 __owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
                                RAW_EXTENSION *exts,  X509 *x, size_t chainidx,
                                int *al);
@@ -173,159 +186,197 @@ __owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
                              SSL_SESSION *sess, int sign);
 
 /* Server Extension processing */
-int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                               int *al);
-int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                               int *al);
+int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
+                               X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
+                               X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRP
-int tls_parse_ctos_srp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
 #endif
+int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
+                              X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_EC
-int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                 int *al);
-int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, X509 *x,
-                                    size_t chainidx, int *al);
+int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
+                                 X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
+                                    X509 *x, size_t chainidx, int *al);
 #endif
-int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                  int *al);
-int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                            int *al);
+int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                            size_t chainidx, int *al);
 #ifndef OPENSSL_NO_OCSP
-int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                  int *al);
+int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_parse_ctos_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
 #endif
-int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                        size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRTP
-int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                            int *al);
+int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                            size_t chainidx, int *al);
 #endif
-int tls_parse_ctos_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
-int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                             int *al);
-int tls_parse_ctos_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
-int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                 int *al);
-int tls_parse_ctos_psk(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
+int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                             size_t chainidx, int *al);
+int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
+int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
+                                 X509 *x, size_t chainidx, int *al);
+int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
 
-int tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, X509 *x,
-                                   size_t chainidx, int *al);
-int tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, X509 *x,
-                                   size_t chainidx, int *al);
+int tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
+                                   X509 *x, size_t chainidx, int *al);
+int tls_construct_stoc_server_name(SSL *s, WPACKET *pkt, unsigned int context,
+                                   X509 *x, size_t chainidx, int *al);
+int tls_construct_stoc_early_data_info(SSL *s, WPACKET *pkt,
+                                       unsigned int context, X509 *x,
+                                       size_t chainidx, int *al);
+int tls_construct_stoc_early_data(SSL *s, WPACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_EC
-int tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x,
-                                     size_t chainidx, int *al);
+int tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context,
+                                     X509 *x, size_t chainidx, int *al);
 #endif
-int tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
+                                      unsigned int context, X509 *x,
                                       size_t chainidx, int *al);
 #ifndef OPENSSL_NO_OCSP
-int tls_construct_stoc_status_request(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
+                                      unsigned int context, X509 *x,
                                       size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
+                                      unsigned int context, X509 *x,
                                       size_t chainidx, int *al);
 #endif
-int tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                            int *al);
+int tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                            size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRTP
-int tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                int *al);
+int tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
+                                X509 *x, size_t chainidx, int *al);
 #endif
-int tls_construct_stoc_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
-int tls_construct_stoc_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
-int tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                 int *al);
+int tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
+int tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
+int tls_construct_stoc_key_share(SSL *s, WPACKET *pkt, unsigned int context,
+                                 X509 *x, size_t chainidx, int *al);
 /*
  * Not in public headers as this is not an official extension. Only used when
  * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
  */
 #define TLSEXT_TYPE_cryptopro_bug      0xfde8
-int tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, X509 *x,
-                                     size_t chainidx, int *al);
+int tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt, unsigned int context,
+                                     X509 *x, size_t chainidx, int *al);
+int tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
 
 /* Client Extension processing */
-int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x,
-                                   size_t chainidx, int *al);
-int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x,
-                                   size_t chainidx, int *al);
+int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
+                                   X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
+                                   X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRP
-int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                   int *al);
+int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_EC
-int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x,
-                                     size_t chainidx, int *al);
-int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, unsigned int context,
+                                     X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
+                                        unsigned int context, X509 *x,
                                         size_t chainidx, int *al);
 #endif
-int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_ctos_early_data(SSL *s, WPACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
+                                      unsigned int context, X509 *x,
                                       size_t chainidx, int *al);
-int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                int *al);
+int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, unsigned int context,
+                                X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_OCSP
-int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
+                                      unsigned int context, X509 *x,
                                       size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
+int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
 #endif
-int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                            int *al);
+int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                            size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRTP
-int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                int *al);
+int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
+                                X509 *x, size_t chainidx, int *al);
 #endif
-int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
+int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
 #ifndef OPENSSL_NO_CT
-int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
+int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
 #endif
-int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
-int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x,
+int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
+int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
+                                          unsigned int context, X509 *x,
                                           size_t chainidx, int *al);
-int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                                 int *al);
-int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, X509 *x,
-                                     size_t chainidx, int *al);
-int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                               int *al);
-int tls_construct_ctos_psk(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
-                           int *al);
-int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                               int *al);
-int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                               int *al);
+int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, unsigned int context,
+                                 X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt, unsigned int context,
+                                     X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
+                              X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, unsigned int context,
+                               X509 *x, size_t chainidx, int *al);
+int tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+                           size_t chainidx, int *al);
+int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
+                               X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
+                               X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_early_data_info(SSL *s, PACKET *pkt, unsigned int context,
+                              X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
+                              X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_EC
-int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                 int *al);
+int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
+                                 X509 *x, size_t chainidx, int *al);
 #endif
-int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                  int *al);
+int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
 #ifndef OPENSSL_NO_OCSP
-int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                                  int *al);
+int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
+                                  X509 *x, size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_CT
-int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
 #endif
 #ifndef OPENSSL_NO_NEXTPROTONEG
-int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
 #endif
-int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                        size_t chainidx, int *al);
 #ifndef OPENSSL_NO_SRTP
-int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                            int *al);
+int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                            size_t chainidx, int *al);
 #endif
-int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
-int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
-int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
-                             int *al);
-int tls_parse_stoc_psk(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al);
+int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
+int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
+int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                             size_t chainidx, int *al);
+int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
+int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+                       size_t chainidx, int *al);
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