refactor: improve code structure

1 files changed, 519 insertions, 0 deletions

diff --git a/src/m_email/EMailBasicGpgOpera.cpp b/src/m_email/EMailBasicGpgOpera.cpp
new file mode 100644
index 0000000..bf60d1c
--- /dev/null
+++ b/src/m_email/EMailBasicGpgOpera.cpp
@@ -0,0 +1,519 @@
+/**
+ * Copyright (C) 2021-2024 Saturneric <[email protected]>
+ *
+ * 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.
+ *
+ * GpgFrontend 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 GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from
+ * the gpg4usb project, which is under GPL-3.0-or-later.
+ *
+ * All the source code of GpgFrontend was modified and released by
+ * Saturneric <[email protected]> starting on May 12, 2021.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
+
+#include "EMailBasicGpgOpera.h"
+
+#include <GFSDKGpg.h>
+
+//
+#include <QCryptographicHash>
+
+#include "EMailHelper.h"
+#include "GFModuleCommonUtils.hpp"
+
+auto EncryptEMLData(int channel, const QStringList& keys,
+                    const EMailMetaData& meta_data, const QByteArray& body_data,
+                    QString& eml_data) -> int {
+  auto from = meta_data.from;
+  auto recipient_list = meta_data.to;
+  auto cc_list = meta_data.cc;
+  auto bcc_list = meta_data.bcc;
+  auto subject = meta_data.subject;
+
+  QString name;
+  QString email;
+
+  try {
+    vmime::messageBuilder plaintext_msg_builder;
+
+    if (ParseEmailString(from, name, email)) {
+      plaintext_msg_builder.setExpeditor(
+          vmime::mailbox(vmime::text(name.toStdString()), email.toStdString()));
+    } else {
+      plaintext_msg_builder.setExpeditor(vmime::mailbox(from.toStdString()));
+    }
+
+    for (const QString& recipient : recipient_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        plaintext_msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        plaintext_msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : cc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        plaintext_msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        plaintext_msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : bcc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        plaintext_msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        plaintext_msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    plaintext_msg_builder.setSubject(vmime::text(subject.toStdString()));
+
+    vmime::shared_ptr<vmime::message> plaintext_msg =
+        plaintext_msg_builder.construct();
+
+    auto plaintext_msg_header = plaintext_msg->getHeader();
+
+    auto plaintext_msg_content_type_header_field =
+        plaintext_msg_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    plaintext_msg_content_type_header_field->setValue("text/plain");
+    plaintext_msg_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("charset", "UTF-8"));
+    plaintext_msg_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("format", "flowed"));
+
+    auto plaintext_msg_content_trans_encode_field =
+        plaintext_msg_header->getField(
+            vmime::fields::CONTENT_TRANSFER_ENCODING);
+    plaintext_msg_content_trans_encode_field->setValue("base64");
+
+    auto plaintext_msg_body = plaintext_msg->getBody();
+
+    auto mime_part_body_content =
+        vmime::make_shared<vmime::stringContentHandler>();
+    mime_part_body_content->setData(
+        body_data.toBase64().toStdString(),
+        vmime::encoding(vmime::encodingTypes::BASE64));
+    plaintext_msg_body->setContents(mime_part_body_content);
+
+    auto plaintext_eml_data =
+        Q_SC(plaintext_msg->generate(vmime::lineLengthLimits::infinite));
+
+    GFGpgEncryptionResult* enc_result = nullptr;
+    auto ret = GFGpgEncryptData(channel, QListToCharArray(keys), keys.size(),
+                                QDUP(plaintext_eml_data), 1, &enc_result);
+
+    if (ret != 0) {
+      eml_data = "Encryption Failed";
+      return -1;
+    }
+
+    auto encrypted_data = UDUP(enc_result->encrypted_data);
+    GFFreeMemory(enc_result);
+
+    vmime::messageBuilder msg_builder;
+
+    if (ParseEmailString(from, name, email)) {
+      msg_builder.setExpeditor(vmime::mailbox(email.toStdString()));
+    } else {
+      msg_builder.setExpeditor(vmime::mailbox(from.toStdString()));
+    }
+
+    for (const QString& recipient : recipient_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(email.toStdString()));
+      } else {
+        msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : cc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(email.toStdString()));
+      } else {
+        msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : bcc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(email.toStdString()));
+      } else {
+        msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    msg_builder.setSubject(vmime::text("..."));
+
+    vmime::shared_ptr<vmime::message> msg = msg_builder.construct();
+
+    auto header = msg->getHeader();
+
+    // no Content-Transfer-Encoding
+    header->removeField(
+        header->getField(vmime::fields::CONTENT_TRANSFER_ENCODING));
+
+    auto content_type_header_field =
+        header->getField<vmime::contentTypeField>(vmime::fields::CONTENT_TYPE);
+    content_type_header_field->setValue("multipart/encrypted");
+    content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("protocol",
+                                             "application/pgp-encrypted"));
+
+    auto root_part_boundary = vmime::body::generateRandomBoundaryString();
+    content_type_header_field->setBoundary(root_part_boundary);
+
+    auto root_body_part = vmime::make_shared<vmime::body>();
+    auto control_info_part = vmime::make_shared<vmime::bodyPart>();
+    auto encrypted_data_part = vmime::make_shared<vmime::bodyPart>();
+
+    root_body_part->appendPart(control_info_part);
+    root_body_part->appendPart(encrypted_data_part);
+    msg->setBody(root_body_part);
+
+    root_body_part->setPrologText(
+        "This is an OpenPGP/MIME encrypted message (RFC 4880 and 3156)");
+
+    auto control_info_part_header = control_info_part->getHeader();
+    auto control_info_content_type_field =
+        control_info_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    control_info_content_type_field->setValue("application/pgp-encrypted");
+
+    auto control_info_part_content_desc_header_field =
+        control_info_part_header->getField(vmime::fields::CONTENT_DESCRIPTION);
+    control_info_part_content_desc_header_field->setValue(
+        "PGP/MIME version identification");
+
+    auto control_info_body = control_info_part->getBody();
+    auto control_info_content =
+        vmime::make_shared<vmime::stringContentHandler>("Version: 1");
+    control_info_body->setContents(control_info_content);
+
+    auto encrypted_data_part_header = encrypted_data_part->getHeader();
+    auto encrypted_data_content_type_field =
+        encrypted_data_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    encrypted_data_content_type_field->setValue("application/octet-stream");
+    encrypted_data_content_type_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("name", "encrypted.asc"));
+
+    auto encrypted_data_content_desc_header_field =
+        encrypted_data_part_header->getField(
+            vmime::fields::CONTENT_DESCRIPTION);
+    encrypted_data_content_desc_header_field->setValue(
+        "OpenPGP encrypted message");
+
+    auto encrypted_data_content_disp_header_field =
+        encrypted_data_part_header->getField<vmime::contentDispositionField>(
+            vmime::fields::CONTENT_DISPOSITION);
+    encrypted_data_content_disp_header_field->setValue("inline");
+    encrypted_data_content_disp_header_field->setFilename(
+        vmime::word({"encrypted.asc"}));
+
+    auto encrypted_data_body = encrypted_data_part->getBody();
+    auto encrypted_data_content =
+        vmime::make_shared<vmime::stringContentHandler>(
+            encrypted_data.toStdString());
+    encrypted_data_body->setContents(encrypted_data_content);
+
+    eml_data = Q_SC(msg->generate(vmime::lineLengthLimits::infinite));
+    FLOG_DEBUG("EML Data: %1", eml_data);
+
+    return 0;
+
+  } catch (const vmime::exception& e) {
+    eml_data = QString("VMIME Error: %1").arg(e.what());
+    return -1;
+  }
+
+  eml_data = QString("Unknown Error: %1");
+  return -1;
+}
+
+auto SignEMLData(int channel, const QString& key,
+                 const EMailMetaData& meta_data, const QByteArray& body_data,
+                 QString& eml_data) -> int {
+  auto from = meta_data.from;
+  auto recipient_list = meta_data.to;
+  auto cc_list = meta_data.cc;
+  auto bcc_list = meta_data.bcc;
+  auto subject = meta_data.subject;
+
+  QString name;
+  QString email;
+
+  try {
+    vmime::messageBuilder msg_builder;
+
+    if (ParseEmailString(from, name, email)) {
+      msg_builder.setExpeditor(
+          vmime::mailbox(vmime::text(name.toStdString()), email.toStdString()));
+    } else {
+      msg_builder.setExpeditor(vmime::mailbox(email.toStdString()));
+    }
+
+    for (const QString& recipient : recipient_list) {
+      auto trimmed_recipient = recipient.trimmed();
+
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        msg_builder.getRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : cc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        msg_builder.getCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    for (const QString& recipient : bcc_list) {
+      auto trimmed_recipient = recipient.trimmed();
+      if (ParseEmailString(trimmed_recipient, name, email)) {
+        msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(vmime::text(name.toStdString()),
+                                               email.toStdString()));
+      } else {
+        msg_builder.getBlindCopyRecipients().appendAddress(
+            vmime::make_shared<vmime::mailbox>(
+                trimmed_recipient.toStdString()));
+      }
+    }
+
+    msg_builder.setSubject(vmime::text(subject.toStdString()));
+
+    vmime::shared_ptr<vmime::message> msg = msg_builder.construct();
+
+    auto header = msg->getHeader();
+
+    // no Content-Transfer-Encoding
+    header->removeField(
+        header->getField(vmime::fields::CONTENT_TRANSFER_ENCODING));
+
+    auto content_type_header_field =
+        header->getField<vmime::contentTypeField>(vmime::fields::CONTENT_TYPE);
+    content_type_header_field->setValue("multipart/signed");
+    auto body_boundary = vmime::body::generateRandomBoundaryString();
+    content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("protocol",
+                                             "application/pgp-signature"));
+    content_type_header_field->setBoundary(body_boundary);
+
+    auto root_body_part = vmime::make_shared<vmime::body>();
+    auto container_part = vmime::make_shared<vmime::bodyPart>();
+    auto mime_part = vmime::make_shared<vmime::bodyPart>();
+    auto public_key_part = vmime::make_shared<vmime::bodyPart>();
+    auto signature_part = vmime::make_shared<vmime::bodyPart>();
+
+    root_body_part->appendPart(container_part);
+    root_body_part->appendPart(signature_part);
+    msg->setBody(root_body_part);
+
+    root_body_part->setPrologText(
+        "This is an OpenPGP/MIME signed message (RFC 4880 and 3156)");
+
+    auto container_boundary = vmime::body::generateRandomBoundaryString();
+    auto container_part_header = container_part->getHeader();
+    auto container_part_content_ttype_header_field =
+        container_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    container_part_content_ttype_header_field->setValue("multipart/mixed");
+    container_part_content_ttype_header_field->setBoundary(container_boundary);
+
+    auto container_part_body = container_part->getBody();
+
+    container_part_body->appendPart(mime_part);
+    container_part_body->appendPart(public_key_part);
+
+    auto public_key_part_header = public_key_part->getHeader();
+
+    auto public_key_name = QString("OpenPGP_0x%1.asc").arg(key.toUpper());
+    auto public_key_part_content_type_header_field =
+        public_key_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    public_key_part_content_type_header_field->setValue("application/pgp-keys");
+    public_key_part_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("name",
+                                             public_key_name.toStdString()));
+
+    auto public_key_part_content_desc_header_field =
+        public_key_part_header->getField(vmime::fields::CONTENT_DESCRIPTION);
+    public_key_part_content_desc_header_field->setValue("OpenPGP public key");
+
+    auto public_key_part_content_trans_encode_field =
+        public_key_part_header->getField(
+            vmime::fields::CONTENT_TRANSFER_ENCODING);
+    public_key_part_content_trans_encode_field->setValue("quoted-printable");
+
+    auto public_key_part_content_disp_header_field =
+        public_key_part_header->getField<vmime::contentDispositionField>(
+            vmime::fields::CONTENT_DISPOSITION);
+    public_key_part_content_disp_header_field->setValue("attachment");
+    public_key_part_content_disp_header_field->setFilename(
+        vmime::word(public_key_name.toStdString()));
+
+    auto signature_part_header = signature_part->getHeader();
+
+    auto signature_part_content_type_header_field =
+        signature_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    signature_part_content_type_header_field->setValue(
+        "application/pgp-signature");
+    signature_part_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("name", "OpenPGP_signature.asc"));
+
+    auto signature_part_content_desc_header_field =
+        signature_part_header->getField(vmime::fields::CONTENT_DESCRIPTION);
+    signature_part_content_desc_header_field->setValue(
+        "OpenPGP digital signature");
+
+    auto signature_part_content_disp_header_field =
+        signature_part_header->getField<vmime::contentDispositionField>(
+            vmime::fields::CONTENT_DISPOSITION);
+    signature_part_content_disp_header_field->setValue("attachment");
+    signature_part_content_disp_header_field->setFilename(
+        vmime::word({"OpenPGP_signature.asc"}));
+
+    auto public_key = UDUP(GFGpgPublicKey(channel, QDUP(key), 1));
+    if (public_key.isEmpty()) {
+      eml_data = "Get Public Key of Sign Key Failed";
+      return -1;
+    }
+
+    auto public_key_part_part_body = public_key_part->getBody();
+    auto public_key_part_body_content =
+        vmime::make_shared<vmime::stringContentHandler>();
+    public_key_part_body_content->setData(
+        public_key.toLatin1().replace('\n', "\r\n").toStdString(),
+        vmime::encoding(vmime::encodingTypes::QUOTED_PRINTABLE));
+    public_key_part_part_body->setContents(public_key_part_body_content);
+
+    auto mime_part_header = mime_part->getHeader();
+
+    auto mime_part_content_type_header_field =
+        mime_part_header->getField<vmime::contentTypeField>(
+            vmime::fields::CONTENT_TYPE);
+    mime_part_content_type_header_field->setValue("text/plain");
+    mime_part_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("charset", "UTF-8"));
+    mime_part_content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>("format", "flowed"));
+    auto mime_part_content_trans_encode_field =
+        mime_part_header->getField(vmime::fields::CONTENT_TRANSFER_ENCODING);
+    mime_part_content_trans_encode_field->setValue("base64");
+
+    auto mime_part_part_body = mime_part->getBody();
+    auto mime_part_body_content =
+        vmime::make_shared<vmime::stringContentHandler>();
+    mime_part_body_content->setData(
+        body_data.toBase64().toStdString(),
+        vmime::encoding(vmime::encodingTypes::BASE64));
+    mime_part_part_body->setContents(mime_part_body_content);
+
+    auto container_raw_data =
+        Q_SC(container_part->generate(vmime::lineLengthLimits::infinite));
+
+    auto container_raw_data_hash = QCryptographicHash::hash(
+        container_raw_data.toLatin1(), QCryptographicHash::Sha1);
+    FLOG_DEBUG("raw content of signature hash: %1",
+               container_raw_data_hash.toHex());
+
+    FLOG_DEBUG("MIME Raw Data For Signature: %1", container_raw_data);
+    FLOG_DEBUG("Signature Channel: %1, Sign Key: %2", channel, key);
+
+    GFGpgSignResult* s;
+    auto ret = GFGpgSignData(channel, QListToCharArray({key}), 1,
+                             QDUP(container_raw_data), 1, 1, &s);
+
+    if (ret != 0) {
+      eml_data = "Sign Failed";
+      return -1;
+    }
+
+    auto signature = UDUP(s->signature);
+    auto hash_algo = UDUP(s->hash_algo);
+
+    GFFreeMemory(s);
+
+    FLOG_DEBUG("Hash Algo: %1 Signature Data: %2", hash_algo, signature);
+    content_type_header_field->appendParameter(
+        vmime::make_shared<vmime::parameter>(
+            "micalg",
+            QString("pgp-%1").arg(hash_algo.toLower()).toStdString()));
+
+    auto signature_part_body = signature_part->getBody();
+    auto signature_part_body_content =
+        vmime::make_shared<vmime::stringContentHandler>(
+            signature.toStdString());
+    signature_part_body->setContents(signature_part_body_content);
+
+    eml_data = Q_SC(msg->generate(vmime::lineLengthLimits::infinite));
+
+    FLOG_DEBUG("EML Data: %1", eml_data);
+
+    return 0;
+
+  } catch (const vmime::exception& e) {
+    eml_data = QString("VMIME Error: %1").arg(e.what());
+    return -1;
+  }
+
+  eml_data = QString("Unknown Error: %1");
+  return -1;
+}
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