-/* Callbacks and structures for handling custom TLS Extensions:
- * cli_ext_first_cb - sends data for ClientHello TLS Extension
- * cli_ext_second_cb - receives data from ServerHello TLS Extension
- * srv_ext_first_cb - receives data from ClientHello TLS Extension
- * srv_ext_second_cb - sends data for ServerHello TLS Extension
- *
- * All these functions return nonzero on success. Zero will terminate
- * the handshake (and return a specific TLS Fatal alert, if the function
- * declaration has an "al" parameter). -1 for the "sending" functions
- * will cause the TLS Extension to be omitted.
- *
- * "ext_type" is a TLS "ExtensionType" from 0-65535.
- * "in" is a pointer to TLS "extension_data" being provided to the cb.
- * "out" is used by the callback to return a pointer to "extension data"
- * which OpenSSL will later copy into the TLS handshake. The contents
- * of this buffer should not be changed until the handshake is complete.
- * "inlen" and "outlen" are TLS Extension lengths from 0-65535.
- * "al" is a TLS "AlertDescription" from 0-255 which WILL be sent as a
- * fatal TLS alert, if the callback returns zero.
- */
-typedef int (*custom_cli_ext_first_cb_fn)(SSL *s, unsigned short ext_type,
- const unsigned char **out,
- unsigned short *outlen, int *al, void *arg);
-typedef int (*custom_cli_ext_second_cb_fn)(SSL *s, unsigned short ext_type,
- const unsigned char *in,
- unsigned short inlen, int *al,
- void *arg);
-
-typedef int (*custom_srv_ext_first_cb_fn)(SSL *s, unsigned short ext_type,
- const unsigned char *in,
- unsigned short inlen, int *al,
- void *arg);
-typedef int (*custom_srv_ext_second_cb_fn)(SSL *s, unsigned short ext_type,
- const unsigned char **out,
- unsigned short *outlen, int *al, void *arg);
-
-typedef struct {
- unsigned short ext_type;
- custom_cli_ext_first_cb_fn fn1;
- custom_cli_ext_second_cb_fn fn2;
- void *arg;
-} custom_cli_ext_record;
-
-typedef struct {
- unsigned short ext_type;
- custom_srv_ext_first_cb_fn fn1;
- custom_srv_ext_second_cb_fn fn2;
- void *arg;
-} custom_srv_ext_record;
-
-/* Callbacks and structures for handling Supplemental Data:
- * srv_supp_data_first_cb_fn - server sends Supplemental Data
- * srv_supp_data_second_cb_fn - server receives Supplemental Data
- * cli_supp_data_first_cb_fn - client receives Supplemental Data
- * cli_supp_data_second_cb_fn - client sends Supplemental Data
- *
- * All these functions return nonzero on success. Zero will terminate
- * the handshake (and return a specific TLS Fatal alert, if the function
- * declaration has an "al" parameter). -1 for the "sending" functions
- * will result in no supplemental data entry being added to the
- * supplemental data message for the provided supplemental data type.
- *
- * "supp_data_type" is a Supplemental Data Type from 0-65535.
- * "in" is a pointer to TLS "supplemental_data_entry" being provided to the cb.
- * "out" is used by the callback to return a pointer to "supplemental data"
- * which OpenSSL will later copy into the TLS handshake. The contents
- * of this buffer should not be changed until the handshake is complete.
- * "inlen" and "outlen" are Supplemental Data lengths from 0-65535.
- * "al" is a TLS "AlertDescription" from 0-255 which WILL be sent as a
- * fatal TLS alert, if the callback returns zero.
- */
-typedef int (*srv_supp_data_first_cb_fn)(SSL *s, unsigned short supp_data_type,
- const unsigned char **out,
- unsigned short *outlen, int *al, void *arg);
-typedef int (*srv_supp_data_second_cb_fn)(SSL *s, unsigned short supp_data_type,
- const unsigned char *in,
- unsigned short inlen, int *al,
- void *arg);
-
-typedef int (*cli_supp_data_first_cb_fn)(SSL *s, unsigned short supp_data_type,
- const unsigned char *in,
- unsigned short inlen, int *al,
- void *arg);
-typedef int (*cli_supp_data_second_cb_fn)(SSL *s, unsigned short supp_data_type,
- const unsigned char **out,
- unsigned short *outlen, int *al, void *arg);
-
-typedef struct {
- unsigned short supp_data_type;
- srv_supp_data_first_cb_fn fn1;
- srv_supp_data_second_cb_fn fn2;
- void *arg;
-} srv_supp_data_record;
-
-typedef struct {
- unsigned short supp_data_type;
- cli_supp_data_first_cb_fn fn1;
- cli_supp_data_second_cb_fn fn2;
- void *arg;
-} cli_supp_data_record;