[Buildroot] [PATCH 11/15] ntp: support libressl

[Adam Duskett <aduskett@gmail.com>]

In addition, add the patch 0004-libressl-support.patch
This fixes some preprocessor checks that determine whether
or not to use OpenSSL 1.1 or 1.0.x. Because LibreSSL returns 2.x
the macros think that OpenSSL 1.1 should be used. This patch
checks to see if there is an LIBRESSL_VERSION_NUMBER defined
as well.

Upstream-Status: Pending
http://bugs.ntp.org/show_bug.cgi?id=3401#c3

Signed-off-by: Adam Duskett <aduskett@gmail.com>
---
 package/ntp/0004-libressl-support.patch | 105 ++++++++++++++++++++++++++++++++
 package/ntp/Config.in                   |   2 +-
 package/ntp/ntp.mk                      |   9 ++-
 3 files changed, 114 insertions(+), 2 deletions(-)
 create mode 100644 package/ntp/0004-libressl-support.patch

diff --git a/package/ntp/0004-libressl-support.patch b/package/ntp/0004-libressl-support.patch
new file mode 100644
index 000000000..2ac4ee89d
--- /dev/null
+++ b/package/ntp/0004-libressl-support.patch
@@ -0,0 +1,106 @@
+From a3bd714d3028241c7546ded6ae6b93887a17a7fa Mon Sep 17 00:00:00 2001
+From: Adam Duskett <aduskett@gmail.com>
+Date: Wed, 12 Jul 2017 09:14:38 -0400
+Subject: [PATCH] add libressl support
+
+Fix some preprocessor macros to add libressl support.
+Upstream-Status: Pending
+http://bugs.ntp.org/show_bug.cgi?id=3401#c3
+
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ include/libssl_compat.h                | 4 +++-
+ libntp/libssl_compat.c                 | 2 +-
+ libntp/ssl_init.c                      | 2 +-
+ ports/winnt/include/msvc_ssl_autolib.h | 2 +-
+ sntp/libevent/test/regress_ssl.c       | 4 ++--
+ 5 files changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/include/libssl_compat.h b/include/libssl_compat.h
+index 2a3697c..eede47b 100644
+--- a/include/libssl_compat.h
++++ b/include/libssl_compat.h
+@@ -25,8 +25,10 @@
+ #include "openssl/rsa.h"
+ 
+ #ifndef OPENSSL_VERSION_NUMBER
++#ifndef LIBRESSL_VERSION_NUMBER
+ #define OPENSSL_VERSION_NUMBER SSLEAY_VERSION_NUMBER
+ #endif
++#endif
+ 
+ #ifndef OPENSSL_VERSION_TEXT
+ #define OPENSSL_VERSION_TEXT SSLEAY_VERSION_TEXT
+@@ -37,7 +39,7 @@
+ #endif
+ 
+ /* ----------------------------------------------------------------- */
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ /* ----------------------------------------------------------------- */
+ 
+ # include <openssl/objects.h>
+diff --git a/libntp/libssl_compat.c b/libntp/libssl_compat.c
+index afe4d07..dae7017 100644
+--- a/libntp/libssl_compat.c
++++ b/libntp/libssl_compat.c
+@@ -26,7 +26,7 @@
+ /* ----------------------------------------------------------------- */
+ 
+ /* ----------------------------------------------------------------- */
+-#if defined(OPENSSL) && OPENSSL_VERSION_NUMBER < 0x10100000L
++#if defined(OPENSSL) && OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ /* ----------------------------------------------------------------- */
+ 
+ #include "libssl_compat.h"
+diff --git a/libntp/ssl_init.c b/libntp/ssl_init.c
+index bebf6e1..0a27050 100644
+--- a/libntp/ssl_init.c
++++ b/libntp/ssl_init.c
+@@ -21,7 +21,7 @@
+ 
+ int ssl_init_done;
+ 
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ 
+ static void
+ atexit_ssl_cleanup(void)
+diff --git a/ports/winnt/include/msvc_ssl_autolib.h b/ports/winnt/include/msvc_ssl_autolib.h
+index 688b5e2..393e1c9 100644
+--- a/ports/winnt/include/msvc_ssl_autolib.h
++++ b/ports/winnt/include/msvc_ssl_autolib.h
+@@ -85,7 +85,7 @@
+  * request in the object file, depending on the SSL version and the
+  * build variant.
+  */
+-# if OPENSSL_VERSION_NUMBER >= 0x10100000L
++# if OPENSSL_VERSION_NUMBER >= 0x10100000L && ! defined(LIBRESSL_VERSION_NUMBER)
+ #  pragma comment(lib, "libcrypto" LTAG_SIZE LTAG_RTLIB LTAG_DEBUG ".lib")
+ # else
+ #  pragma comment(lib, "libeay32" LTAG_RTLIB LTAG_DEBUG ".lib")
+diff --git a/sntp/libevent/test/regress_ssl.c b/sntp/libevent/test/regress_ssl.c
+index 226a2a3..dc761dc 100644
+--- a/sntp/libevent/test/regress_ssl.c
++++ b/sntp/libevent/test/regress_ssl.c
+@@ -61,7 +61,7 @@
+ 
+ #include <string.h>
+ 
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER) || defined(LIBRESSL_VERSION_NUMBER)
+ #define OpenSSL_version_num SSLeay
+ #endif /* OPENSSL_VERSION_NUMBER */
+ 
+@@ -130,7 +130,7 @@ getcert(void)
+ 	X509_set_subject_name(x509, name);
+ 	X509_set_issuer_name(x509, name);
+ 
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ 	X509_time_adj(X509_get_notBefore(x509), 0, &now);
+ 	now += 3600;
+ 	X509_time_adj(X509_get_notAfter(x509), 0, &now);
+-- 
+2.13.0
+
diff --git a/package/ntp/Config.in b/package/ntp/Config.in
index 1af02dbc0..804efec54 100644
--- a/package/ntp/Config.in
+++ b/package/ntp/Config.in
@@ -1,7 +1,7 @@
 config BR2_PACKAGE_NTP
 	bool "ntp"
 	select BR2_PACKAGE_LIBEVENT
-	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_OPENSSL if !BR2_PACKAGE_LIBRESSL
 	help
 	  Network Time Protocol suite/programs.
 	  Provides things like ntpd, ntpdate, ntpq, etc...
diff --git a/package/ntp/ntp.mk b/package/ntp/ntp.mk
index c70d6e635..929a5fd87 100644
--- a/package/ntp/ntp.mk
+++ b/package/ntp/ntp.mk
@@ -7,7 +7,7 @@
 NTP_VERSION_MAJOR = 4.2
 NTP_VERSION = $(NTP_VERSION_MAJOR).8p10
 NTP_SITE = https://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-$(NTP_VERSION_MAJOR)
-NTP_DEPENDENCIES = host-pkgconf libevent openssl $(if $(BR2_PACKAGE_BUSYBOX),busybox)
+NTP_DEPENDENCIES = host-pkgconf libevent $(if $(BR2_PACKAGE_BUSYBOX),busybox)
 NTP_LICENSE = NTP
 NTP_LICENSE_FILES = COPYRIGHT
 NTP_CONF_ENV = ac_cv_lib_md5_MD5Init=no
@@ -24,6 +24,13 @@ NTP_CONF_OPTS = \
 # 0003-ntpq-fpic.patch
 NTP_AUTORECONF = YES
 
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+NTP_DEPENDENCIES += openssl
+endif
+ifeq ($(BR2_PACKAGE_LIBRESSL),y)
+NTP_DEPENDENCIES += libressl
+endif
+
 ifeq ($(BR2_TOOLCHAIN_HAS_SSP),y)
 NTP_CONF_OPTS += --with-locfile=linux
 else
-- 
2.13.0