1 files changed, 53 insertions, 0 deletions
diff --git a/lib/e2ee/qolmutility.cpp b/lib/e2ee/qolmutility.cpp
new file mode 100644
index 00000000..46f7f4f3
--- /dev/null
+++ b/lib/e2ee/qolmutility.cpp
@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: 2021 Carl Schwan <carlschwan@kde.org>
+//
+// SPDX-License-Identifier: LGPL-2.1-or-later
+
+#include "e2ee/qolmutility.h"
+
+#include <olm/olm.h>
+
+using namespace Quotient;
+
+OlmErrorCode QOlmUtility::lastErrorCode() const {
+    return olm_utility_last_error_code(m_utility);
+}
+
+const char* QOlmUtility::lastError() const
+{
+    return olm_utility_last_error(m_utility);
+}
+
+QOlmUtility::QOlmUtility()
+{
+    auto utility = new uint8_t[olm_utility_size()];
+    m_utility = olm_utility(utility);
+}
+
+QOlmUtility::~QOlmUtility()
+{
+    olm_clear_utility(m_utility);
+    delete[](reinterpret_cast<uint8_t *>(m_utility));
+}
+
+QString QOlmUtility::sha256Bytes(const QByteArray &inputBuf) const
+{
+    const auto outputLen = olm_sha256_length(m_utility);
+    QByteArray outputBuf(outputLen, '\0');
+    olm_sha256(m_utility, inputBuf.data(), inputBuf.length(),
+            outputBuf.data(), outputBuf.length());
+
+    return QString::fromUtf8(outputBuf);
+}
+
+QString QOlmUtility::sha256Utf8Msg(const QString &message) const
+{
+    return sha256Bytes(message.toUtf8());
+}
+
+bool QOlmUtility::ed25519Verify(const QByteArray& key, const QByteArray& message,
+                                QByteArray signature)
+{
+    return olm_ed25519_verify(m_utility, key.data(), key.size(), message.data(),
+                              message.size(), signature.data(), signature.size())
+           == 0;
+}