MD5 hash check for existing & downloaded files

1 files changed, 29 insertions, 0 deletions

diff --git a/client/Utility.cpp b/client/Utility.cpp
new file mode 100644
index 0000000..2faed74
--- /dev/null
+++ b/client/Utility.cpp
@@ -0,0 +1,29 @@
+
+#include <QCryptographicHash>
+#include "client.h"
+#include "Logger.h"
+#include "Utility.h"
+
+
+QByteArray md5_sum(QString &filename)
+{
+	QFile file(filename);
+	if (! file.exists())
+	{
+		Logger::Warn("Can't compute md5sum: file %s do not exist\n", filename.toStdString().c_str());
+		return NULL;
+	}
+	
+	file.open(QIODevice::ReadOnly);
+	QCryptographicHash md5hash(QCryptographicHash::Md5);	
+	while (! file.atEnd())
+	{
+		const size_t buf_sz = 4096;
+		md5hash.addData(file.read(buf_sz));
+	}
+	file.close();
+	
+	QByteArray res = md5hash.result().toHex();
+	Logger::Debug("MD5 sum for %s is: %s\n", filename.toStdString().c_str(), res.data());
+	return res;
+}