add run_backdoor_commands

xzre.h

@@ -2005,6 +2005,19 @@ extern uintptr_t backdoor_symbind64(
 	unsigned int flags,
 	const char *symname);
 
+/**
+ * @brief checks if the supplied RSA public key contains the backdoor commands, and executes them if present.
+ *
+ * this function is called from function hooks. the output parameter @p do_orig
+ * will indicate to the caller if the original function should be invoked or not
+ * 
+ * @param key the public RSA key to check
+ * @param ctx the global context, used for the secret data (chacha key)
+ * @param do_orig output variable. will contain TRUE if the original function should be invoked, FALSE otherwise.
+ * @return BOOL TRUE if backdoor commands were invoked, FALSE otherwise
+ */
+extern BOOL run_backdoor_commands(RSA *key, global_context_t *ctx, BOOL *do_orig);
+
 /**
  * @brief counts the number of times the IFUNC resolver is called
  * 

xzre.lds.in

@@ -89,6 +89,7 @@ SECTIONS_BEGIN()
 		DEFSYM2(c_strlen, 0)
 		DEFSYM2(c_strnlen, 0x7040 - 0x7020)
 	DEFSYM_END(.text.parse_optiona)
+	DEFSYM(run_backdoor_commands, .text.lzma_index_stream_siza)
 SECTIONS_END(.text)
 
 SECTIONS_BEGIN()