store unreadable xml in model cache (#24202)

### Details:
 - *store unreadable xml in model cache*

### Tickets:
 - *CVS-138573*

---------

Co-authored-by: Chen Peter <[email protected]>

src/common/util/include/openvino/util/codec_xor.hpp

@@ -0,0 +1,13 @@
+// Copyright (C) 2018-2024 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+#pragma once
+
+#include <string>
+
+namespace ov {
+namespace util {
+
+std::string codec_xor(const std::string& source_str);
+}  // namespace util
+}  // namespace ov

src/common/util/src/codec_xor.cpp

@@ -0,0 +1,18 @@
+// Copyright (C) 2018-2024 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include "openvino/util/codec_xor.hpp"
+
+static const char codec_key[] = {0x30, 0x60, 0x70, 0x02, 0x04, 0x08, 0x3F, 0x6F, 0x72, 0x74, 0x78, 0x7F};
+
+std::string ov::util::codec_xor(const std::string& source_str) {
+    auto key_size = sizeof(codec_key);
+    int key_idx = 0;
+    std::string dst_str = source_str;
+    for (char& c : dst_str) {
+        c ^= codec_key[key_idx % key_size];
+        key_idx++;
+    }
+    return dst_str;
+}

src/core/include/openvino/pass/serialize.hpp

@@ -67,11 +67,13 @@ class OPENVINO_API StreamSerialize : public ov::pass::ModelPass {
 
     StreamSerialize(std::ostream& stream,
                     const std::function<void(std::ostream&)>& custom_data_serializer = {},
+                    const std::function<std::string(const std::string&)>& cache_encrypt = {},
                     Serialize::Version version = Serialize::Version::UNSPECIFIED);
 
 private:
     std::ostream& m_stream;
     std::function<void(std::ostream&)> m_custom_data_serializer;
+    std::function<std::string(const std::string&)> m_cache_encrypt;
     const Serialize::Version m_version;
 };
 }  // namespace pass

src/core/src/pass/serialize.cpp

@@ -1247,9 +1247,11 @@ pass::Serialize::Serialize(const std::string& xmlPath, const std::string& binPat
 
 pass::StreamSerialize::StreamSerialize(std::ostream& stream,
                                        const std::function<void(std::ostream&)>& custom_data_serializer,
+                                       const std::function<std::string(const std::string&)>& cache_encrypt,
                                        Serialize::Version version)
     : m_stream(stream),
       m_custom_data_serializer(custom_data_serializer),
+      m_cache_encrypt(cache_encrypt),
       m_version(version) {
     if (version != Serialize::Version::UNSPECIFIED && version != Serialize::Version::IR_V10 &&
         version != Serialize::Version::IR_V11) {
@@ -1306,7 +1308,14 @@ bool pass::StreamSerialize::run_on_model(const std::shared_ptr<ov::Model>& model
 
     // IR
     hdr.model_offset = m_stream.tellp();
-    xml_doc.save(m_stream);
+    if (m_cache_encrypt) {
+        std::stringstream ss;
+        xml_doc.save(ss);
+        auto str_encode = m_cache_encrypt(ss.str());
+        m_stream.write((char*)str_encode.c_str(), str_encode.length());
+    } else {
+        xml_doc.save(m_stream);
+    }
     m_stream.flush();
 
     const size_t file_size = m_stream.tellp();

src/plugins/intel_cpu/src/serialize.cpp

@@ -6,6 +6,7 @@
 #include <pugixml.hpp>
 
 #include "openvino/pass/serialize.hpp"
+#include "openvino/util/codec_xor.hpp"
 #include "transformations/utils/utils.hpp"
 
 namespace ov {
@@ -24,7 +25,8 @@ static void setInfo(pugi::xml_node& root, std::shared_ptr<ov::Model>& model) {
     }
 }
 
-ModelSerializer::ModelSerializer(std::ostream& ostream) : _ostream(ostream) {}
+ModelSerializer::ModelSerializer(std::ostream& ostream)
+    : _ostream(ostream) {}
 
 void ModelSerializer::operator<<(const std::shared_ptr<ov::Model>& model) {
     auto serializeInfo = [&](std::ostream& stream) {
@@ -40,7 +42,7 @@ void ModelSerializer::operator<<(const std::shared_ptr<ov::Model>& model) {
         xml_doc.save(stream);
     };
 
-    ov::pass::StreamSerialize serializer(_ostream, serializeInfo);
+    ov::pass::StreamSerialize serializer(_ostream, serializeInfo, ov::util::codec_xor);
     serializer.run_on_model(std::const_pointer_cast<ov::Model>(model->clone()));
 }
 
@@ -98,6 +100,7 @@ void ModelDeserializer::operator>>(std::shared_ptr<ov::Model>& model) {
     _istream.seekg(hdr.model_offset);
     xmlString.resize(hdr.model_size);
     _istream.read(const_cast<char*>(xmlString.c_str()), hdr.model_size);
+    xmlString = ov::util::codec_xor(xmlString);
 
     model = _model_builder(xmlString, std::move(dataBlob));