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diff --git a/src/gpg/model/GpgSignature.h b/src/gpg/model/GpgSignature.h
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+/**
+ * This file is part of GpgFrontend.
+ *
+ * GpgFrontend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from gpg4usb-team.
+ * Their source code version also complies with GNU General Public License.
+ *
+ * The source code version of this software was modified and released
+ * by Saturneric<[email protected]> starting on May 12, 2021.
+ *
+ */
+
+#ifndef GPGFRONTEND_GPGSIGNATURE_H
+#define GPGFRONTEND_GPGSIGNATURE_H
+
+#include <boost/date_time/gregorian/greg_date.hpp>
+#include <boost/date_time/posix_time/conversion.hpp>
+
+#include "gpg/GpgConstants.h"
+
+namespace GpgFrontend {
+class GpgSignature {
+ public:
+  [[nodiscard]] gpgme_validity_t validity() const {
+    return _signature_ref->validity;
+  }
+
+  [[nodiscard]] gpgme_error_t status() const { return _signature_ref->status; }
+
+  [[nodiscard]] gpgme_error_t summary() const {
+    return _signature_ref->summary;
+  }
+
+  [[nodiscard]] std::string pubkey_algo() const {
+    return gpgme_pubkey_algo_name(_signature_ref->pubkey_algo);
+  }
+
+  [[nodiscard]] std::string hash_algo() const {
+    return gpgme_hash_algo_name(_signature_ref->hash_algo);
+  }
+
+  [[nodiscard]] boost::posix_time::ptime create_time() const {
+    return boost::posix_time::from_time_t(_signature_ref->timestamp);
+  }
+  [[nodiscard]] boost::posix_time::ptime expire_time() const {
+    return boost::posix_time::from_time_t(_signature_ref->exp_timestamp);
+  }
+
+  [[nodiscard]] std::string fpr() const { return _signature_ref->fpr; }
+
+  GpgSignature() = default;
+
+  ~GpgSignature() = default;
+
+  explicit GpgSignature(gpgme_signature_t sig);
+
+  GpgSignature(GpgSignature &&) noexcept = default;
+
+  GpgSignature(const GpgSignature &) = delete;
+
+  GpgSignature &operator=(GpgSignature &&) noexcept = default;
+
+  GpgSignature &operator=(const GpgSignature &) = delete;
+
+ private:
+  using KeySignatrueRefHandler =
+      std::unique_ptr<struct _gpgme_signature,
+                      std::function<void(gpgme_signature_t)>>;
+
+  KeySignatrueRefHandler _signature_ref = nullptr;
+};
+}  // namespace GpgFrontend
+
+#endif  // GPGFRONTEND_GPGSIGNATURE_H