cleanup: Merge crypto_core and crypto_core_mem.

The remaining memory functions are small and don't need their own file.

CMakeLists.txt

@@ -163,11 +163,7 @@ set(toxcore_PKGCONFIG_REQUIRES)
 set(toxcore_SOURCES ${toxcore_SOURCES}
   toxcore/ccompat.h
   toxcore/crypto_core.c
-  toxcore/crypto_core.h
-  toxcore/crypto_core_mem.c)
-include(CheckFunctionExists)
-check_function_exists(explicit_bzero HAVE_EXPLICIT_BZERO)
-check_function_exists(memset_s HAVE_MEMSET_S)
+  toxcore/crypto_core.h)
 set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${LIBSODIUM_LIBRARIES})
 set(toxcore_PKGCONFIG_REQUIRES ${toxcore_PKGCONFIG_REQUIRES} libsodium)
 

toxcore/BUILD.bazel

@@ -16,13 +16,8 @@ cc_library(
 
 cc_library(
     name = "crypto_core",
-    srcs = [
-        "crypto_core.c",
-        "crypto_core_mem.c",
-    ],
-    hdrs = [
-        "crypto_core.h",
-    ],
+    srcs = ["crypto_core.c"],
+    hdrs = ["crypto_core.h"],
     visibility = ["//c-toxcore:__subpackages__"],
     deps = [
         ":ccompat",

toxcore/Makefile.inc

@@ -14,7 +14,6 @@ libtoxcore_la_SOURCES = ../toxcore/ccompat.h \
                         ../toxcore/network.c \
                         ../toxcore/crypto_core.h \
                         ../toxcore/crypto_core.c \
-                        ../toxcore/crypto_core_mem.c \
                         ../toxcore/ping_array.h \
                         ../toxcore/ping_array.c \
                         ../toxcore/net_crypto.h \

toxcore/crypto_core.c

@@ -77,6 +77,43 @@ static void crypto_free(uint8_t *ptr, size_t bytes)
 }
 #endif  // !defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
 
+void crypto_memzero(void *data, size_t length)
+{
+#ifndef VANILLA_NACL
+    sodium_memzero(data, length);
+#else
+    memset(data, 0, length);
+#endif
+}
+
+bool crypto_memlock(void *data, size_t length)
+{
+#ifndef VANILLA_NACL
+
+    if (sodium_mlock(data, length) != 0) {
+        return false;
+    }
+
+    return true;
+#else
+    return false;
+#endif
+}
+
+bool crypto_memunlock(void *data, size_t length)
+{
+#ifndef VANILLA_NACL
+
+    if (sodium_munlock(data, length) != 0) {
+        return false;
+    }
+
+    return true;
+#else
+    return false;
+#endif
+}
+
 int32_t public_key_cmp(const uint8_t *pk1, const uint8_t *pk2)
 {
 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION