Added some checks in KSSL (in TDEIO) to correctly recognize LibreSSL (which is a fork of OpenSSL 1.0.1b)

This resolves issue #28.

Signed-off-by: Mavridis Philippe <mfilippos@yandex.ru>
(cherry picked from commit 86fea6f5c5)

tdeio/kssl/kopenssl.h

@@ -48,7 +48,8 @@ class KOpenSSLProxyPrivate;
 #include <openssl/stack.h>
 #include <openssl/bn.h>
 #undef crypt
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
 #define STACK OPENSSL_STACK
 #else
 #if OPENSSL_VERSION_NUMBER >= 0x10000000L
@@ -59,7 +60,7 @@ class KOpenSSLProxyPrivate;
 
 #include <kstaticdeleter.h>
 
-#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
 typedef int (*X509_STORE_CTX_verify_cb)(int, X509_STORE_CTX *);
 typedef int X509_LOOKUP_TYPE;
 #endif

tdeio/kssl/ksslcertificate.cc

@@ -1069,7 +1069,7 @@ return qba;
 
 #define NETSCAPE_CERT_HDR     "certificate"
 #ifdef KSSL_HAVE_SSL
-#if OPENSSL_VERSION_NUMBER >= 0x10100000L
+#if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBERSSL_VERSION_NUMBER)
 typedef struct NETSCAPE_X509_st
 {
 	ASN1_OCTET_STRING *header;