[hcoop/debian/exim4.git] / src / dane.c

/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) University of Cambridge 1995 - 2012, 2014 */
/* See the file NOTICE for conditions of use and distribution. */

/* This module provides DANE (RFC6659) support for Exim.  See also
the draft RFC for DANE-over-SMTP, "SMTP security via opportunistic DANE TLS"
(V. Dukhovni, W. Hardaker) - version 10, dated May 25, 2014.

The code for DANE support with Openssl was provided by V.Dukhovni.

No cryptographic code is included in Exim. All this module does is to call
functions from the OpenSSL or GNU TLS libraries. */


#include "exim.h"

/* This module is compiled only when it is specifically requested in the
build-time configuration. However, some compilers don't like compiling empty
modules, so keep them happy with a dummy when skipping the rest. Make it
reference itself to stop picky compilers complaining that it is unused, and put
in a dummy argument to stop even pickier compilers complaining about infinite
loops. */

#ifndef SUPPORT_DANE
static void dummy(int x) { dummy(x-1); }
#else

/* Enabling DANE without enabling TLS cannot work. Abort the compilation. */
# ifndef SUPPORT_TLS
#  error DANE support requires that TLS support must be enabled. Abort build.
# endif

/* DNSSEC support is also required */
# ifndef RES_USE_DNSSEC
#  error DANE support requires that the DNS resolver library supports DNSSEC
# endif

# ifndef USE_GNUTLS
#  include "dane-openssl.c"
# endif


#endif  /* SUPPORT_DANE */

/* End of dane.c */
Commit	Line	Data
2ea97746 CE	1	/*************************************************
	2	* Exim - an Internet mail transport agent *
	3	*************************************************/
	4
	5	/* Copyright (c) University of Cambridge 1995 - 2012, 2014 */
	6	/* See the file NOTICE for conditions of use and distribution. */
	7
	8	/* This module provides DANE (RFC6659) support for Exim. See also
	9	the draft RFC for DANE-over-SMTP, "SMTP security via opportunistic DANE TLS"
	10	(V. Dukhovni, W. Hardaker) - version 10, dated May 25, 2014.
	11
	12	The code for DANE support with Openssl was provided by V.Dukhovni.
	13
	14	No cryptographic code is included in Exim. All this module does is to call
	15	functions from the OpenSSL or GNU TLS libraries. */
	16
	17
	18	#include "exim.h"
	19
	20	/* This module is compiled only when it is specifically requested in the
	21	build-time configuration. However, some compilers don't like compiling empty
	22	modules, so keep them happy with a dummy when skipping the rest. Make it
	23	reference itself to stop picky compilers complaining that it is unused, and put
	24	in a dummy argument to stop even pickier compilers complaining about infinite
	25	loops. */
	26
	27	#ifndef SUPPORT_DANE
	28	static void dummy(int x) { dummy(x-1); }
	29	#else
	30
	31	/* Enabling DANE without enabling TLS cannot work. Abort the compilation. */
	32	# ifndef SUPPORT_TLS
	33	# error DANE support requires that TLS support must be enabled. Abort build.
	34	# endif
	35
	36	/* DNSSEC support is also required */
	37	# ifndef RES_USE_DNSSEC
	38	# error DANE support requires that the DNS resolver library supports DNSSEC
	39	# endif
	40
	41	# ifndef USE_GNUTLS
	42	# include "dane-openssl.c"
	43	# endif
	44
	45
	46	#endif /* SUPPORT_DANE */
	47
	48	/* End of dane.c */