rough impl of checksum verification

modules/build/include/checksums.hpp

@@ -65,4 +65,4 @@ extern "C" std::string generate_file_checksum(const std::filesystem::path& file_
  * @param input_string The string to be hashed
  * @return String containing the hexadecimal representation of the checksum, or empty string on error
  */
-extern "C" std::string generate_string_checksum(const std::string& input_string);
+extern "C" std::string generate_string_checksum(const std::string& input_string);

modules/verify/src/verification.cpp

@@ -13,6 +13,7 @@
 
 #include "verification.hpp"
 
+
 int verify_checksums_package(const std::string& package_path) {
     // Check if the package file exists
     if (!std::filesystem::exists(package_path)) {
@@ -20,11 +21,97 @@ int verify_checksums_package(const std::string& package_path) {
         return 1;
     }
 
-    // Placeholder implementation
     dpm_log(LOG_INFO, ("Verifying checksums for package: " + package_path).c_str());
-    dpm_log(LOG_INFO, "Package checksum verification not yet implemented");
 
-    return 0;
+    // Load the build module to access functions
+    void* build_module = nullptr;
+    int result = check_and_load_build_module(build_module);
+    if (result != 0 || build_module == nullptr) {
+        dpm_log(LOG_ERROR, "Failed to load build module");
+        return 1;
+    }
+
+    // Create a temporary directory for extraction
+    std::filesystem::path temp_dir = std::filesystem::temp_directory_path() / "dpm_verify_tmp";
+
+    // Remove temp directory if it already exists
+    if (std::filesystem::exists(temp_dir)) {
+        try {
+            std::filesystem::remove_all(temp_dir);
+        } catch (const std::filesystem::filesystem_error& e) {
+            dpm_log(LOG_ERROR, ("Failed to clean up existing temp directory: " + std::string(e.what())).c_str());
+            dpm_unload_module(build_module);
+            return 1;
+        }
+    }
+
+    // Create the temp directory
+    try {
+        std::filesystem::create_directory(temp_dir);
+    } catch (const std::filesystem::filesystem_error& e) {
+        dpm_log(LOG_ERROR, ("Failed to create temp directory: " + std::string(e.what())).c_str());
+        dpm_unload_module(build_module);
+        return 1;
+    }
+
+    // Unseal the package to the temp directory using dpm_execute_symbol
+    dpm_log(LOG_INFO, "Unsealing package to temporary directory for verification...");
+    std::string output_dir = temp_dir.string();
+    bool force = true; // Force overwrite if directory exists
+
+    result = dpm_execute_symbol(build_module, "unseal_package", package_path, output_dir, force);
+
+    if (result != 0) {
+        dpm_log(LOG_ERROR, "Failed to unseal package for verification");
+        dpm_unload_module(build_module);
+
+        // Clean up temp directory
+        try {
+            std::filesystem::remove_all(temp_dir);
+        } catch (const std::filesystem::filesystem_error&) {
+            // Ignore cleanup errors
+        }
+
+        return 1;
+    }
+
+    // Get the extracted stage directory name (package name without .dpm)
+    std::string package_filename = std::filesystem::path(package_path).filename().string();
+    std::string stage_name = package_filename;
+
+    // Remove .dpm extension if present
+    const std::string dpm_extension = ".dpm";
+    if (stage_name.ends_with(dpm_extension)) {
+        stage_name = stage_name.substr(0, stage_name.length() - dpm_extension.length());
+    }
+
+    std::filesystem::path stage_dir = temp_dir / stage_name;
+
+    // Verify checksums in the extracted stage directory
+    dpm_log(LOG_INFO, ("Verifying checksums in extracted stage: " + stage_dir.string()).c_str());
+
+    // Now verify the stage directory checksums
+    result = verify_checksums_stage(stage_dir.string());
+
+    // Clean up temp directory
+    dpm_log(LOG_INFO, "Cleaning up temporary extraction directory...");
+    try {
+        std::filesystem::remove_all(temp_dir);
+    } catch (const std::filesystem::filesystem_error& e) {
+        dpm_log(LOG_WARN, ("Failed to clean up temp directory: " + std::string(e.what())).c_str());
+        // Continue execution - this is just a cleanup warning
+    }
+
+    // Clean up module handle
+    dpm_unload_module(build_module);
+
+    if (result == 0) {
+        dpm_log(LOG_INFO, "Package checksum verification completed successfully");
+    } else {
+        dpm_log(LOG_ERROR, "Package checksum verification failed");
+    }
+
+    return result;
 }
 
 int verify_checksums_stage(const std::string& stage_dir) {
@@ -53,22 +140,13 @@ int verify_checksums_stage(const std::string& stage_dir) {
         return 1;
     }
 
-    // Get the unseal_stage_components function
+    // Use dpm_execute_symbol to call the unseal_stage_components function
-    typedef int (*UnsealComponentsFunc)(const std::filesystem::path&);
+    std::filesystem::path stage_path(stage_dir);
-    dlerror(); // Clear any previous error
+    result = dpm_execute_symbol(build_module, "unseal_stage_components", stage_path);
-    UnsealComponentsFunc unseal_components = (UnsealComponentsFunc)dlsym(build_module, "unseal_stage_components");
-    const char* dlsym_error = dlerror();
-    if (dlsym_error) {
-        dpm_log(LOG_ERROR, ("Failed to find unseal_stage_components function: " + std::string(dlsym_error)).c_str());
-        dlclose(build_module);
-        return 1;
-    }
 
-    // Call the function to unseal the components
-    result = unseal_components(std::filesystem::path(stage_dir));
     if (result != 0) {
         dpm_log(LOG_ERROR, "Failed to unseal stage components");
-        dlclose(build_module);
+        dpm_unload_module(build_module);
         return 1;
     }
 
@@ -76,26 +154,26 @@ int verify_checksums_stage(const std::string& stage_dir) {
     result = checksum_verify_package_digest(stage_dir, build_module);
     if (result != 0) {
         dpm_log(LOG_ERROR, "Package digest verification failed");
-        dlclose(build_module);
+        dpm_unload_module(build_module);
         return 1;
     }
 
     result = checksum_verify_contents_digest(stage_dir, build_module);
     if (result != 0) {
         dpm_log(LOG_ERROR, "Contents manifest verification failed");
-        dlclose(build_module);
+        dpm_unload_module(build_module);
         return 1;
     }
 
     result = checksum_verify_hooks_digest(stage_dir, build_module);
     if (result != 0) {
         dpm_log(LOG_ERROR, "Hooks digest verification failed");
-        dlclose(build_module);
+        dpm_unload_module(build_module);
         return 1;
     }
 
     // Clean up
-    dlclose(build_module);
+    dpm_unload_module(build_module);
 
     dpm_log(LOG_INFO, "All checksums verified successfully");
     return 0;
@@ -115,6 +193,7 @@ int verify_signature_package(const std::string& package_path) {
     return 0;
 }
 
+
 int verify_signature_stage(const std::string& stage_dir) {
     // Check if the stage directory exists
     if (!std::filesystem::exists(stage_dir)) {