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/*++
/* NAME
/* tlsproxy_state 3
/* SUMMARY
/* Postfix SMTP server
/* SYNOPSIS
/* #include <tlsproxy.h>
/*
/* TLSP_STATE *tlsp_state_create(service, plaintext_stream)
/* const char *service;
/* VSTREAM *plaintext_stream;
/*
/* void tlsp_state_free(state)
/* TLSP_STATE *state;
/* DESCRIPTION
/* This module provides TLSP_STATE constructor and destructor
/* routines.
/*
/* tlsp_state_create() initializes session context.
/*
/* tlsp_state_free() destroys session context. If the handshake
/* was in progress, it logs a 'handshake failed' message.
/*
/* Arguments:
/* .IP service
/* The service name for the TLS library. This argument is copied.
/* The destructor will automatically destroy the string.
/* .IP plaintext_stream
/* The VSTREAM between postscreen(8) and tlsproxy(8).
/* The destructor will automatically close the stream.
/* .PP
/* Other structure members are set by the application. The
/* text below describes how the TLSP_STATE destructor
/* disposes of them.
/* .IP plaintext_buf
/* NBBIO for plaintext I/O.
/* The destructor will automatically turn off read/write/timeout
/* events and destroy the NBBIO.
/* .IP ciphertext_fd
/* The file handle for the remote SMTP client socket.
/* The destructor will automatically turn off read/write events
/* and close the file handle.
/* .IP ciphertext_timer
/* The destructor will automatically turn off this time event.
/* .IP timeout
/* Time limit for plaintext and ciphertext I/O.
/* .IP remote_endpt
/* Printable remote endpoint name.
/* The destructor will automatically destroy the string.
/* .IP server_id
/* TLS session cache identifier.
/* The destructor will automatically destroy the string.
/* DIAGNOSTICS
/* All errors are fatal.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/*
* System library.
*/
#include <sys_defs.h>
/*
* Utility library.
*/
#include <msg.h>
#include <mymalloc.h>
#include <nbbio.h>
/*
* Master library.
*/
#include <mail_server.h>
/*
* TLS library.
*/
#ifdef USE_TLS
#define TLS_INTERNAL /* XXX */
#include <tls.h>
#include <tls_proxy.h>
/*
* Application-specific.
*/
#include <tlsproxy.h>
/* tlsp_state_create - create TLS proxy state object */
TLSP_STATE *tlsp_state_create(const char *service,
VSTREAM *plaintext_stream)
{
TLSP_STATE *state = (TLSP_STATE *) mymalloc(sizeof(*state));
state->flags = TLSP_FLAG_DO_HANDSHAKE;
state->service = mystrdup(service);
state->plaintext_stream = plaintext_stream;
state->plaintext_buf = 0;
state->ciphertext_fd = -1;
state->ciphertext_timer = 0;
state->timeout = -1;
state->remote_endpt = 0;
state->server_id = 0;
state->tls_context = 0;
state->tls_params = 0;
state->server_init_props = 0;
state->server_start_props = 0;
state->client_init_props = 0;
state->client_start_props = 0;
return (state);
}
/* tlsp_state_free - destroy state objects, connection and events */
void tlsp_state_free(TLSP_STATE *state)
{
/* Don't log failure after plaintext EOF. */
if (state->remote_endpt && state->server_id
&& (state->flags & TLSP_FLAG_DO_HANDSHAKE))
msg_info("TLS handshake failed for service=%s peer=%s",
state->server_id, state->remote_endpt);
myfree(state->service);
if (state->plaintext_buf) /* turns off plaintext events */
nbbio_free(state->plaintext_buf);
else
event_disable_readwrite(vstream_fileno(state->plaintext_stream));
event_server_disconnect(state->plaintext_stream);
if (state->ciphertext_fd >= 0) {
event_disable_readwrite(state->ciphertext_fd);
(void) close(state->ciphertext_fd);
}
if (state->ciphertext_timer)
event_cancel_timer(state->ciphertext_timer, (void *) state);
if (state->remote_endpt) {
msg_info("DISCONNECT %s", state->remote_endpt);
myfree(state->remote_endpt);
}
if (state->server_id)
myfree(state->server_id);
if (state->tls_context)
tls_free_context(state->tls_context);
if (state->tls_params)
tls_proxy_client_param_free(state->tls_params);
if (state->server_init_props)
tls_proxy_server_init_free(state->server_init_props);
if (state->server_start_props)
tls_proxy_server_start_free(state->server_start_props);
if (state->client_init_props)
tls_proxy_client_init_free(state->client_init_props);
if (state->client_start_props)
tls_proxy_client_start_free(state->client_start_props);
myfree((void *) state);
}
#endif
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