Merge remote-tracking branch 'upstream-public/pr/1423' into development-proposed

ChangeLog

@@ -28,6 +28,10 @@ Features
      OpenVPN Inc. Fixes #1339
    * Add support for public keys encoded in PKCS#1 format. #1122
 
+New deprecations
+   * Deprecate support for record compression (configuration option
+     MBEDTLS_ZLIB_SUPPORT).
+
 Bugfix
    * Fix the name of a DHE parameter that was accidentally changed in 2.7.0.
      Fixes #1358.

include/mbedtls/config.h

@@ -1542,6 +1542,9 @@
  *
  * \note Currently compression can't be used with DTLS.
  *
+ * \deprecated This feature is deprecated and will be removed
+ *             in the next major revision of the library.
+ *
  * Used in: library/ssl_tls.c
  *          library/ssl_cli.c
  *          library/ssl_srv.c

include/mbedtls/ssl.h

@@ -49,6 +49,15 @@
 #endif
 
 #if defined(MBEDTLS_ZLIB_SUPPORT)
+
+#if defined(MBEDTLS_DEPRECATED_WARNING)
+#warning "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and will be removed in the next major revision of the library"
+#endif
+
+#if defined(MBEDTLS_DEPRECATED_REMOVED)
+#error "Record compression support via MBEDTLS_ZLIB_SUPPORT is deprecated and cannot be used if MBEDTLS_DEPRECATED_REMOVED is set"
+#endif
+
 #include "zlib.h"
 #endif