Split utilities functions into separate files

src/utilities/cryptutils.cpp

@@ -0,0 +1,75 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2018-2021, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QByteArray>
+#include <QString>
+#include <QCryptographicHash>
+
+#include "cryptutils.h"
+
+namespace Utilities {
+
+QByteArray Hmac(const QByteArray &key, const QByteArray &data, const QCryptographicHash::Algorithm method) {
+
+  constexpr int block_size = 64;
+  Q_ASSERT(key.length() <= block_size);
+
+  QByteArray inner_padding(block_size, static_cast<char>(0x36));
+  QByteArray outer_padding(block_size, static_cast<char>(0x5c));
+
+  for (int i = 0; i < key.length(); ++i) {
+    inner_padding[i] = static_cast<char>(inner_padding[i] ^ key[i]);
+    outer_padding[i] = static_cast<char>(outer_padding[i] ^ key[i]);
+  }
+
+  QByteArray part;
+  part.append(inner_padding);
+  part.append(data);
+
+  QByteArray total;
+  total.append(outer_padding);
+  total.append(QCryptographicHash::hash(part, method));
+
+  return QCryptographicHash::hash(total, method);
+
+}
+
+QByteArray HmacSha256(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Sha256);
+}
+
+QByteArray HmacMd5(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Md5);
+}
+
+QByteArray HmacSha1(const QByteArray &key, const QByteArray &data) {
+  return Hmac(key, data, QCryptographicHash::Sha1);
+}
+
+QByteArray Sha1CoverHash(const QString &artist, const QString &album) {
+
+  QCryptographicHash hash(QCryptographicHash::Sha1);
+  hash.addData(artist.toLower().toUtf8());
+  hash.addData(album.toLower().toUtf8());
+
+  return hash.result();
+
+}
+
+}  // namespace Utilities