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TLS_CONFIG_SET_SES... DragonFly Library Functions Manual TLS_CONFIG_SET_SES...


NAME

     tls_config_set_session_fd, tls_config_set_session_id,
     tls_config_set_session_lifetime, tls_config_add_ticket_key -- configure
     resuming of TLS handshakes


SYNOPSIS

     #include <tls.h>

     int
     tls_config_set_session_fd(struct tls_config *config, int session_fd);

     int
     tls_config_set_session_id(struct tls_config *config,
	 const unsigned char *session_id, size_t len);

     int
     tls_config_set_session_lifetime(struct tls_config *config, int lifetime);

     int
     tls_config_add_ticket_key(struct tls_config *config, uint32_t keyrev,
	 unsigned char *key, size_t keylen);


DESCRIPTION

     tls_config_set_session_fd() sets a file descriptor to be used to manage
     data for TLS sessions (client only).  The given file descriptor must be a
     regular file and be owned by the current user, with permissions being
     restricted to only allow the owner to read and write the file (0600).  If
     the file has a non-zero length, the client will attempt to read session
     data from this file and resume the previous TLS session with the server.
     Upon a successful handshake the file will be updated with current session
     data, if available.  The caller is responsible for closing this file
     descriptor, after all TLS contexts that have been configured to use it
     have been freed via tls_free().

     tls_config_set_session_id() sets the session identifier that will be used
     by the TLS server when sessions are enabled (server only).  By default a
     random value is used.

     tls_config_set_session_lifetime() sets the lifetime to be used for TLS
     sessions (server only).  Session support is disabled if a lifetime of
     zero is specified, which is the default.

     tls_config_add_ticket_key() adds a key used for the encryption and
     authentication of TLS tickets (server only).  By default keys are gener-
     ated and rotated automatically based on their lifetime.  This function
     should only be used to synchronise ticket encryption key across multiple
     processes.  Re-adding a known key will result in an error, unless it is
     the most recently added key.


RETURN VALUES

     These functions return 0 on success or -1 on error.


SEE ALSO

     tls_accept_socket(3), tls_config_set_protocols(3), tls_init(3),
     tls_load_file(3), tls_server(3)


HISTORY

     tls_config_set_session_id(), tls_config_set_session_lifetime() and
     tls_config_add_ticket_key() appeared in OpenBSD 6.1.

     tls_config_set_session_fd() appeared in OpenBSD 6.3.


AUTHORS

     Claudio Jeker <claudio@openbsd.org>
     Joel Sing <jsing@openbsd.org>

DragonFly 5.5		       February 10, 2018		 DragonFly 5.5

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