--- plugins/qca-ossl/qca-ossl.cpp.bak	2020-08-13 20:47:26.316272036 +0200
+++ plugins/qca-ossl/qca-ossl.cpp	2020-08-13 21:14:09.838349311 +0200
@@ -41,7 +41,13 @@
 #include <openssl/pkcs12.h>
 #include <openssl/ssl.h>
 
+#if !defined(LIBRESSL_VERSION_NUMBER)
 #include <openssl/kdf.h>
+#endif
+#ifdef LIBRESSL_VERSION_NUMBER
+#define SSL_CIPHER_standard_name SSL_CIPHER_get_name
+#define RSA_F_RSA_OSSL_PRIVATE_DECRYPT RSA_F_RSA_EAY_PRIVATE_DECRYPT
+#endif
 
 using namespace QCA;
 
@@ -1262,6 +1268,7 @@
 protected:
 };
 
+#ifndef LIBRESSL_VERSION_NUMBER
 class opensslHkdfContext : public HKDFContext
 {
     Q_OBJECT
@@ -1291,6 +1298,7 @@
 		return out;
 	}
 };
+#endif
 
 class opensslHMACContext : public MACContext
 {
@@ -4990,7 +4998,11 @@
 		case TLS::TLS_v1:
 			ctx = SSL_CTX_new(TLS_client_method());
 			SSL_CTX_set_min_proto_version(ctx, TLS1_VERSION);
+#ifdef OPENSSL_NO_TLS1_3
+			SSL_CTX_set_max_proto_version(ctx, TLS1_2_VERSION);
+#else
 			SSL_CTX_set_max_proto_version(ctx, TLS1_3_VERSION);
+#endif
 			break;
 		case TLS::DTLS_v1:
 		default:
@@ -6751,7 +6763,9 @@
 #endif
 		list += QStringLiteral("pbkdf1(sha1)");
 		list += QStringLiteral("pbkdf2(sha1)");
+#ifndef LIBRESSL_VERSION_NUMBER
 		list += QStringLiteral("hkdf(sha256)");
+#endif
 		list += QStringLiteral("pkey");
 		list += QStringLiteral("dlgroup");
 		list += QStringLiteral("rsa");
@@ -6820,8 +6834,10 @@
 #endif
 		else if ( type == QLatin1String("pbkdf2(sha1)") )
 			return new opensslPbkdf2Context( this, type );
+#ifndef LIBRESSL_VERSION_NUMBER
 		else if ( type == QLatin1String("hkdf(sha256)") )
 			return new opensslHkdfContext( this, type );
+#endif
 		else if ( type == QLatin1String("hmac(md5)") )
 			return new opensslHMACContext( EVP_md5(), this, type );
 		else if ( type == QLatin1String("hmac(sha1)") )