ECDH: Fix whitespace and permission problems

3rdparty/CMakeLists.txt

@@ -1,6 +1,6 @@
-add_subdirectory(everest)
-
-set(src_thirdparty
-  ${src_everest}
-  PARENT_SCOPE
-)
+add_subdirectory(everest)
+
+set(src_thirdparty
+  ${src_everest}
+  PARENT_SCOPE
+)

3rdparty/everest/CMakeLists.txt

@@ -1,9 +1,10 @@
-include_directories(include include/everest include/everest/kremlib)
-
-set(src_everest
-  ${CMAKE_CURRENT_SOURCE_DIR}/library/everest.c
-  ${CMAKE_CURRENT_SOURCE_DIR}/library/Hacl_Curve25519.c
-  ${CMAKE_CURRENT_SOURCE_DIR}/library/x25519.c
-  ${CMAKE_CURRENT_SOURCE_DIR}/library/kremlib/FStar_UInt64_FStar_UInt32_FStar_UInt16_FStar_UInt8.c
-  PARENT_SCOPE
-)
+include_directories(include include/everest include/everest/kremlib)
+
+set(src_everest
+  ${CMAKE_CURRENT_SOURCE_DIR}/library/everest.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/library/Hacl_Curve25519.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/library/x25519.c
+  ${CMAKE_CURRENT_SOURCE_DIR}/library/kremlib/FStar_UInt64_FStar_UInt32_FStar_UInt16_FStar_UInt8.c
+  PARENT_SCOPE
+)
+

3rdparty/everest/include/everest/kremlin/internal/callconv.h

@@ -24,7 +24,9 @@
 #endif
 #endif
 
-/* TODO: review these two definitions and understand why they're needed. */
+/* Since KreMLin emits the inline keyword unconditionally, we follow the
+ * guidelines at https://gcc.gnu.org/onlinedocs/gcc/Inline.html and make this
+ * __inline__ to ensure the code compiles with -std=c90 and earlier. */
 #ifdef __GNUC__
 #  define inline __inline__
 #endif

library/ecdh.c

@@ -220,20 +220,18 @@ int mbedtls_ecdh_setup( mbedtls_ecdh_context *ctx, mbedtls_ecp_group_id grp_id )
     switch( grp_id )
     {
 #if defined(MBEDTLS_ECDH_VARIANT_EVEREST_ENABLED)
-        case MBEDTLS_ECP_DP_CURVE25519:
-        {
-            ctx->point_format = MBEDTLS_ECP_PF_COMPRESSED;
-            ctx->var = MBEDTLS_ECDH_VARIANT_EVEREST;
-            ctx->grp_id = grp_id;
-            return( mbedtls_everest_setup( &ctx->ctx.everest_ecdh, grp_id ) );
-        }
+    case MBEDTLS_ECP_DP_CURVE25519:
+        ctx->point_format = MBEDTLS_ECP_PF_COMPRESSED;
+        ctx->var = MBEDTLS_ECDH_VARIANT_EVEREST;
+        ctx->grp_id = grp_id;
+        return( mbedtls_everest_setup( &ctx->ctx.everest_ecdh, grp_id ) );
 #endif
-        default:
-            ctx->point_format = MBEDTLS_ECP_PF_UNCOMPRESSED;
-            ctx->var = MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0;
-            ctx->grp_id = grp_id;
-            ecdh_init_internal( &ctx->ctx.mbed_ecdh );
-            return( ecdh_setup_internal( &ctx->ctx.mbed_ecdh, grp_id ) );
+    default:
+        ctx->point_format = MBEDTLS_ECP_PF_UNCOMPRESSED;
+        ctx->var = MBEDTLS_ECDH_VARIANT_MBEDTLS_2_0;
+        ctx->grp_id = grp_id;
+        ecdh_init_internal( &ctx->ctx.mbed_ecdh );
+        return( ecdh_setup_internal( &ctx->ctx.mbed_ecdh, grp_id ) );
     }
 #endif
 }