v2.0.3-rc (#32)

# Changelog

## v2.0.3-rc

### Issues

* \#28 \[bug\] Address slow directory responses in S3 mounts for deeply nested directories
* \#29 \[bug\] S3 error responses are not being logged
* \#30 \[bug\] Sia provider error responses are not logged
* \#31 \[bug\] S3 provider should limit max key size to 1024

### Changes from v2.0.2-rc

* Always use direct for read-only providers
* Fixed externally removed files not being processed during cleanup
* Fixed http headers not being added for requests
* Fixed incorrect `stat` values for remote mounts
* Fixed invalid directory nullptr error on remote mounts
* Fixed memory leak in event system
* Refactored application shutdown
* Refactored event system
* Updated build system to Alpine 3.21.0
* Updated build system to MinGW-w64 12.0.0
* Updated copyright to 2018-2025

Reviewed-on: #32

support/src/utils/file_enc_file.cpp

@@ -1,5 +1,5 @@
 /*
-  Copyright <2018-2024> <scott.e.graves@protonmail.com>
+  Copyright <2018-2025> <scott.e.graves@protonmail.com>
 
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
@@ -23,31 +23,166 @@
 
 #include "utils/file_enc_file.hpp"
 
+#include "utils/common.hpp"
+#include "utils/encrypting_reader.hpp"
+#include "utils/encryption.hpp"
+
 namespace repertory::utils::file {
-auto enc_file::attach_file(fs_file_t file) -> fs_file_t {}
+auto enc_file::attach_file(fs_file_t file) -> fs_file_t {
+  return fs_file_t{
+      new enc_file(std::move(file)),
+  };
+}
 
 enc_file::enc_file(fs_file_t file) : file_(std::move(file)) {}
 
-void enc_file::close() {}
+void enc_file::close() { file_->close(); }
 
-auto enc_file::copy_to(std::string_view new_path,
-                       bool overwrite) const -> bool {}
+auto enc_file::copy_to(std::string_view new_path, bool overwrite) const
+    -> bool {
+  return file_->copy_to(new_path, overwrite);
+}
 
-void enc_file::flush() const {}
+void enc_file::flush() const { return file_->flush(); }
 
-auto enc_file::move_to(std::string_view path) -> bool {}
+auto enc_file::move_to(std::string_view path) -> bool {
+  return file_->move_to(path);
+}
 
 auto enc_file::read(unsigned char *data, std::size_t to_read,
-                    std::uint64_t offset, std::size_t *total_read) -> bool {}
+                    std::uint64_t offset, std::size_t *total_read) -> bool {
+  if (total_read != nullptr) {
+    *total_read = 0U;
+  }
 
-auto enc_file::remove() -> bool {}
+  auto file_size{size()};
+  if (not file_size.has_value()) {
+    return false;
+  }
 
-auto enc_file::truncate(std::size_t size) -> bool {}
+  to_read = utils::calculate_read_size(file_size.value(), to_read, offset);
+  if (to_read == 0U) {
+    return true;
+  }
+
+  std::size_t bytes_read{};
+  auto ret{
+      utils::encryption::read_encrypted_range(
+          {offset, offset + to_read - 1U},
+          utils::encryption::generate_key<utils::encryption::hash_256_t>(
+              encryption_token_),
+          [&](auto &&ct_buffer, auto &&start_offset,
+              auto &&end_offset) -> bool {
+            ct_buffer.resize(end_offset - start_offset + 1U);
+            return file_->read(ct_buffer, start_offset);
+          },
+          file_size.value(), data, to_read, bytes_read),
+  };
+  if (ret && total_read != nullptr) {
+    *total_read = bytes_read;
+  }
+
+  return ret;
+}
+
+auto enc_file::remove() -> bool { return file_->remove(); }
+
+auto enc_file::truncate(std::size_t size) -> bool {
+  if (size == 0U) {
+    return file_->truncate(size);
+  }
+
+  auto file_size{this->size()};
+  if (not file_size.has_value()) {
+    return false;
+  }
+
+  if (size == file_size.value()) {
+    return true;
+  }
+
+  auto chunks{
+      size / utils::encryption::encrypting_reader::get_data_chunk_size(),
+  };
+  auto real_size{
+      (chunks * utils::encryption::encrypting_reader::get_data_chunk_size()) +
+          (chunks * utils::encryption::encrypting_reader::get_header_size()),
+  };
+  auto remain{
+      size % utils::encryption::encrypting_reader::get_data_chunk_size(),
+  };
+  if (remain > 0U) {
+    real_size +=
+        (remain + utils::encryption::encrypting_reader::get_header_size());
+  }
+
+  if (size < file_size.value()) {
+    if (remain == 0U) {
+      return file_->truncate(real_size);
+    }
+
+    auto begin_chunk{
+        size / utils::encryption::encrypting_reader::get_data_chunk_size(),
+    };
+
+    auto offset{
+        begin_chunk *
+            utils::encryption::encrypting_reader::get_data_chunk_size(),
+    };
+
+    std::size_t total_read{};
+    data_buffer data(
+        utils::encryption::encrypting_reader::get_data_chunk_size());
+    if (not i_file::read(data, offset, &total_read)) {
+      return false;
+    }
+    data.resize(remain);
+
+    if (not file_->truncate(real_size)) {
+      return false;
+    }
+
+    return i_file::write(data, offset);
+  }
+
+  auto begin_chunk{
+      file_size.value() /
+          utils::encryption::encrypting_reader::get_data_chunk_size(),
+  };
+  auto end_chunk{
+      utils::divide_with_ceiling(
+          file_size.value(),
+          utils::encryption::encrypting_reader::get_data_chunk_size()),
+  };
+
+  return false;
+}
 
 auto enc_file::write(const unsigned char *data, std::size_t to_write,
-                     std::size_t offset, std::size_t *total_written) -> bool {}
+                     std::size_t offset, std::size_t *total_written) -> bool {
+  auto file_size{size()};
+  if (not file_size.has_value()) {
+    return false;
+  }
 
-auto enc_file::size() const -> std::optional<std::uint64_t> {}
+  if ((offset + to_write) > file_size.value()) {
+    if (not truncate((offset + to_write) - file_size.value())) {
+      return false;
+    }
+  }
+
+  return false;
+}
+
+auto enc_file::size() const -> std::optional<std::uint64_t> {
+  auto file_size = file_->size();
+  if (not file_size.has_value()) {
+    return std::nullopt;
+  }
+
+  return utils::encryption::encrypting_reader::calculate_decrypted_size(
+      file_size.value());
+}
 } // namespace repertory::utils::file
 
 #endif // defined(PROJECT_ENABLE_LIBSODIUM) && defined(PROJECT_ENABLE_BOOST)