Initial Commit

ferrumhook/network.c

@@ -0,0 +1,66 @@
+#include <windows.h>
+
+#include "taikohook/network.h"
+
+#include "hook/table.h"
+
+#include "util/dprintf.h"
+
+void network_insert_hooks(HMODULE target);
+
+static uint64_t my_TLSv1_method();
+static uint64_t my_SSL_CTX_new(void *method);
+static uint64_t (*next_TLSv1_2_method)();
+static uint64_t (*next_TLSv1_method)();
+static uint64_t (*next_SSL_CTX_new)(void *method);
+
+static const struct hook_symbol nethook_syms[] = {
+    {
+        .link = (void *) &next_TLSv1_2_method,
+        .ordinal = 350
+    },
+    {
+        .patch = my_TLSv1_method,
+        .link = (void *) &next_TLSv1_method,
+        .ordinal = 170
+    },
+    {
+        .patch = my_SSL_CTX_new,
+        .link = (void *) &next_SSL_CTX_new,
+        .ordinal = 12
+    },
+};
+
+HRESULT network_hook_init(const struct ferrum_network_config *cfg)
+{
+    if (!cfg->enable) {
+        return S_FALSE;
+    }
+
+    dprintf("Nethook: Init\n");
+    network_insert_hooks(NULL);
+
+    return S_OK;
+}
+
+void network_insert_hooks(HMODULE target)
+{
+    hook_table_apply(
+        target,
+        "ssleay32.dll",
+        nethook_syms,
+        _countof(nethook_syms)
+    );
+}
+
+static uint64_t my_TLSv1_method()
+{
+    dprintf("Nethook: Redirect TLS v1.0 to v1.2\n");
+    return next_TLSv1_2_method();
+}
+
+static uint64_t my_SSL_CTX_new(void *method)
+{
+    dprintf("Nethook: my_SSL_CTX_new\n");
+    return next_SSL_CTX_new(method);
+}