74 lines
2.3 KiB
Plaintext
74 lines
2.3 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
SSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session - manipulate session cache
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/ssl.h>
|
|
|
|
int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
|
|
int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c);
|
|
|
|
int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
|
|
int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
SSL_CTX_add_session() adds the session B<c> to the context B<ctx>. The
|
|
reference count for session B<c> is incremented by 1. If a session with
|
|
the same session id already exists, the old session is removed by calling
|
|
L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>.
|
|
|
|
SSL_CTX_remove_session() removes the session B<c> from the context B<ctx>.
|
|
L<SSL_SESSION_free(3)|SSL_SESSION_free(3)> is called once for B<c>.
|
|
|
|
SSL_add_session() and SSL_remove_session() are synonyms for their
|
|
SSL_CTX_*() counterparts.
|
|
|
|
=head1 NOTES
|
|
|
|
When adding a new session to the internal session cache, it is examined
|
|
whether a session with the same session id already exists. In this case
|
|
it is assumed that both sessions are identical. If the same session is
|
|
stored in a different SSL_SESSION object, The old session is
|
|
removed and replaced by the new session. If the session is actually
|
|
identical (the SSL_SESSION object is identical), SSL_CTX_add_session()
|
|
is a no-op, and the return value is 0.
|
|
|
|
If a server SSL_CTX is configured with the SSL_SESS_CACHE_NO_INTERNAL_STORE
|
|
flag then the internal cache will not be populated automatically by new
|
|
sessions negotiated by the SSL/TLS implementation, even though the internal
|
|
cache will be searched automatically for session-resume requests (the
|
|
latter can be surpressed by SSL_SESS_CACHE_NO_INTERNAL_LOOKUP). So the
|
|
application can use SSL_CTX_add_session() directly to have full control
|
|
over the sessions that can be resumed if desired.
|
|
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
The following values are returned by all functions:
|
|
|
|
=over 4
|
|
|
|
=item 0
|
|
|
|
The operation failed. In case of the add operation, it was tried to add
|
|
the same (identical) session twice. In case of the remove operation, the
|
|
session was not found in the cache.
|
|
|
|
=item 1
|
|
|
|
The operation succeeded.
|
|
|
|
=back
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ssl(3)|ssl(3)>,
|
|
L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
|
|
L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>
|
|
|
|
=cut
|