--- a/NEWS	Thu Jul 26 12:25:18 2018 +0200
+++ b/NEWS	Thu Jul 26 14:02:20 2018 +0200
@@ -4,6 +4,7 @@
 * New configuration option: "HttpVerbose" to debug outgoing HTTP connections
 * Fix incoming DICOM C-Store filtering for JPEG-LS transfer syntaxes
 * Fix OrthancPluginHttpClient() to return the HTTP status on errors
+* Fix HTTPS requests to sites using a certificate encrypted with ECDSA
 
 
 Version 1.4.1 (2018-07-17)

--- a/Resources/CMake/OpenSslConfiguration.cmake	Thu Jul 26 12:25:18 2018 +0200
+++ b/Resources/CMake/OpenSslConfiguration.cmake	Thu Jul 26 14:02:20 2018 +0200
@@ -208,21 +208,18 @@
       ${OPENSSL_SOURCES_DIR}/engines
       )
   endif()
-
-  if (ENABLE_PKCS11)
-    list(APPEND OPENSSL_SOURCES_SUBDIRS
-      # EC, ECDH and ECDSA are necessary for PKCS11
-      ${OPENSSL_SOURCES_DIR}/crypto/ec
-      ${OPENSSL_SOURCES_DIR}/crypto/ecdh
-      ${OPENSSL_SOURCES_DIR}/crypto/ecdsa
-      )
-  else()
-    add_definitions(
-      -DOPENSSL_NO_EC
-      -DOPENSSL_NO_ECDH
-      -DOPENSSL_NO_ECDSA
-      )
-  endif()
+  
+  list(APPEND OPENSSL_SOURCES_SUBDIRS
+    # EC, ECDH and ECDSA are necessary for PKCS11, and for contacting
+    # HTTPS servers that use TLS certificate encrypted with ECDSA
+    # (check the output of a recent version of the "sslscan"
+    # command). Until Orthanc <= 1.4.1, these features were only
+    # enabled if ENABLE_PKCS11 support was set to "ON".
+    # https://groups.google.com/d/msg/orthanc-users/2l-bhYIMEWg/oMmK33bYBgAJ
+    ${OPENSSL_SOURCES_DIR}/crypto/ec
+    ${OPENSSL_SOURCES_DIR}/crypto/ecdh
+    ${OPENSSL_SOURCES_DIR}/crypto/ecdsa
+    )
 
   foreach(d ${OPENSSL_SOURCES_SUBDIRS})
     AUX_SOURCE_DIRECTORY(${d} OPENSSL_SOURCES)