res_rtp_asterisk: Allow OpenSSL configured with no-deprecated.

Furthermore, allow OpenSSL configured with no-dh. Additionally, this change
allows auto-negotiation of the elliptic curve/group for servers, not only with
OpenSSL 1.0.2 but also with OpenSSL 1.1.0 and newer. This enables X25519
(since OpenSSL 1.1.0) and X448 (since OpenSSL 1.1.1) as a side-effect.

ASTERISK-27910

Change-Id: I5b0dd47c5194ee17f830f869d629d7ef212cf537

configure

@@ -1118,10 +1118,6 @@ PBX_DAHDI
 DAHDI_DIR
 DAHDI_INCLUDE
 DAHDI_LIB
-PBX_OPENSSL_EC
-OPENSSL_EC_DIR
-OPENSSL_EC_INCLUDE
-OPENSSL_EC_LIB
 PBX_OPENSSL_SRTP
 OPENSSL_SRTP_DIR
 OPENSSL_SRTP_INCLUDE
@@ -9596,18 +9592,6 @@ PBX_OPENSSL_SRTP=0
 
 
 
-OPENSSL_EC_DESCRIP="OpenSSL Elliptic Curve Support"
-OPENSSL_EC_OPTION=crypto
-OPENSSL_EC_DIR=${CRYPTO_DIR}
-
-PBX_OPENSSL_EC=0
-
-
-
-
-
-
-
     DAHDI_DESCRIP="DAHDI"
     DAHDI_OPTION="dahdi"
     PBX_DAHDI=0
@@ -30582,106 +30566,6 @@ _ACEOF
 fi
 
 
-fi
-
-if test "$PBX_OPENSSL" = "1";
-then
-
-if test "x${PBX_OPENSSL_EC}" != "x1" -a "${USE_OPENSSL_EC}" != "no"; then
-   pbxlibdir=""
-   # if --with-OPENSSL_EC=DIR has been specified, use it.
-   if test "x${OPENSSL_EC_DIR}" != "x"; then
-      if test -d ${OPENSSL_EC_DIR}/lib; then
-         pbxlibdir="-L${OPENSSL_EC_DIR}/lib"
-      else
-         pbxlibdir="-L${OPENSSL_EC_DIR}"
-      fi
-   fi
-
-      ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
-      CFLAGS="${CFLAGS} "
-      { $as_echo "$as_me:${as_lineno-$LINENO}: checking for EC_KEY_new_by_curve_name in -lssl" >&5
-$as_echo_n "checking for EC_KEY_new_by_curve_name in -lssl... " >&6; }
-if ${ac_cv_lib_ssl_EC_KEY_new_by_curve_name+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lssl ${pbxlibdir} -lcrypto $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-/* Override any GCC internal prototype to avoid an error.
-   Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-#ifdef __cplusplus
-extern "C"
-#endif
-char EC_KEY_new_by_curve_name ();
-int
-main ()
-{
-return EC_KEY_new_by_curve_name ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_ssl_EC_KEY_new_by_curve_name=yes
-else
-  ac_cv_lib_ssl_EC_KEY_new_by_curve_name=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ssl_EC_KEY_new_by_curve_name" >&5
-$as_echo "$ac_cv_lib_ssl_EC_KEY_new_by_curve_name" >&6; }
-if test "x$ac_cv_lib_ssl_EC_KEY_new_by_curve_name" = xyes; then :
-  AST_OPENSSL_EC_FOUND=yes
-else
-  AST_OPENSSL_EC_FOUND=no
-fi
-
-      CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
-
-
-   # now check for the header.
-   if test "${AST_OPENSSL_EC_FOUND}" = "yes"; then
-      OPENSSL_EC_LIB="${pbxlibdir} -lssl -lcrypto"
-      # if --with-OPENSSL_EC=DIR has been specified, use it.
-      if test "x${OPENSSL_EC_DIR}" != "x"; then
-         OPENSSL_EC_INCLUDE="-I${OPENSSL_EC_DIR}/include"
-      fi
-      OPENSSL_EC_INCLUDE="${OPENSSL_EC_INCLUDE} "
-
-         # check for the header
-         ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
-         CPPFLAGS="${CPPFLAGS} ${OPENSSL_EC_INCLUDE}"
-         ac_fn_c_check_header_mongrel "$LINENO" "openssl/ec.h" "ac_cv_header_openssl_ec_h" "$ac_includes_default"
-if test "x$ac_cv_header_openssl_ec_h" = xyes; then :
-  OPENSSL_EC_HEADER_FOUND=1
-else
-  OPENSSL_EC_HEADER_FOUND=0
-fi
-
-
-         CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
-
-      if test "x${OPENSSL_EC_HEADER_FOUND}" = "x0" ; then
-         OPENSSL_EC_LIB=""
-         OPENSSL_EC_INCLUDE=""
-      else
-
-         PBX_OPENSSL_EC=1
-         cat >>confdefs.h <<_ACEOF
-#define HAVE_OPENSSL_EC 1
-_ACEOF
-
-      fi
-   fi
-fi
-
-
 fi
 
 

configure.ac

@@ -461,7 +461,6 @@ AST_EXT_LIB_SETUP([CURSES], [curses], [curses])
 AST_EXT_LIB_SETUP([CRYPT], [password and data encryption], [crypt])
 AST_EXT_LIB_SETUP([CRYPTO], [OpenSSL Cryptography], [crypto])
 AST_EXT_LIB_SETUP_OPTIONAL([OPENSSL_SRTP], [OpenSSL SRTP Extension Support], [CRYPTO], [crypto])
-AST_EXT_LIB_SETUP_OPTIONAL([OPENSSL_EC], [OpenSSL Elliptic Curve Support], [CRYPTO], [crypto])
 AST_EXT_LIB_SETUP([DAHDI], [DAHDI], [dahdi])
 AST_EXT_LIB_SETUP([FFMPEG], [Ffmpeg and avcodec], [avcodec])
 AST_EXT_LIB_SETUP([GSM], [External GSM], [gsm], [, use 'internal' GSM otherwise])
@@ -2508,11 +2507,6 @@ then
         AST_EXT_LIB_CHECK([OPENSSL_SRTP], [ssl], [SSL_CTX_set_tlsext_use_srtp], [openssl/ssl.h], [-lcrypto])
 fi
 
-if test "$PBX_OPENSSL" = "1";
-then
-	AST_EXT_LIB_CHECK([OPENSSL_EC], [ssl], [EC_KEY_new_by_curve_name], [openssl/ec.h], [-lcrypto])
-fi
-
 AST_EXT_LIB_CHECK([SRTP], [srtp2], [srtp_init], [srtp2/srtp.h], [], [], [2])
 AST_EXT_LIB_CHECK_SHARED([SRTP], [srtp2], [srtp_init], [srtp2/srtp.h], [], [], [], [
     AC_MSG_WARN([***])

include/asterisk/autoconfig.h.in

@@ -549,9 +549,6 @@
 /* Define to 1 if you have the OpenSSL Secure Sockets Layer library. */
 #undef HAVE_OPENSSL
 
-/* Define to 1 if CRYPTO has the OpenSSL Elliptic Curve Support feature. */
-#undef HAVE_OPENSSL_EC
-
 /* Define to 1 if CRYPTO has the OpenSSL SRTP Extension Support feature. */
 #undef HAVE_OPENSSL_SRTP
 

res/res_rtp_asterisk.c

@@ -43,9 +43,14 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include <fcntl.h>
 
 #ifdef HAVE_OPENSSL_SRTP
+#include <openssl/opensslconf.h>
+#include <openssl/opensslv.h>
 #include <openssl/ssl.h>
 #include <openssl/err.h>
 #include <openssl/bio.h>
+#ifndef OPENSSL_NO_DH
+#include <openssl/dh.h>
+#endif
 #endif
 
 #ifdef HAVE_PJPROJECT
@@ -1610,7 +1615,7 @@ static int ast_rtp_dtls_set_configuration(struct ast_rtp_instance *instance, con
 {
 	struct ast_rtp *rtp = ast_rtp_instance_get_data(instance);
 	int res;
-#ifdef HAVE_OPENSSL_EC
+#if !defined(OPENSSL_NO_ECDH) && (OPENSSL_VERSION_NUMBER >= 0x10000000L) && (OPENSSL_VERSION_NUMBER < 0x10100000L)
 	EC_KEY *ecdh;
 #endif
 
@@ -1638,8 +1643,7 @@ static int ast_rtp_dtls_set_configuration(struct ast_rtp_instance *instance, con
 
 	SSL_CTX_set_read_ahead(rtp->ssl_ctx, 1);
 
-#ifdef HAVE_OPENSSL_EC
+#ifndef OPENSSL_NO_DH
-
 	if (!ast_strlen_zero(dtls_cfg->pvtfile)) {
 		BIO *bio = BIO_new_file(dtls_cfg->pvtfile, "r");
 		if (bio != NULL) {
@@ -1656,6 +1660,8 @@ static int ast_rtp_dtls_set_configuration(struct ast_rtp_instance *instance, con
 			BIO_free(bio);
 		}
 	}
+#endif /* !OPENSSL_NO_DH */
+#if !defined(OPENSSL_NO_ECDH) && (OPENSSL_VERSION_NUMBER >= 0x10000000L) && (OPENSSL_VERSION_NUMBER < 0x10100000L)
 	/* enables AES-128 ciphers, to get AES-256 use NID_secp384r1 */
 	ecdh = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
 	if (ecdh != NULL) {
@@ -1672,8 +1678,7 @@ static int ast_rtp_dtls_set_configuration(struct ast_rtp_instance *instance, con
 		}
 		EC_KEY_free(ecdh);
 	}
-
+#endif /* !OPENSSL_NO_ECDH */
-#endif /* #ifdef HAVE_OPENSSL_EC */
 
 	rtp->dtls_verify = dtls_cfg->verify;