From 15253d1995ea49b114ef5c627e15b661dbd602b2 Mon Sep 17 00:00:00 2001
From: "Javier S. Pedro" <maemo@javispedro.com>
Date: Sun, 30 Sep 2012 19:41:17 +0200
Subject: add some trivial authentication

---
 distfoldd/agent.h | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

(limited to 'distfoldd/agent.h')

diff --git a/distfoldd/agent.h b/distfoldd/agent.h
index fa202f5..0d25077 100644
--- a/distfoldd/agent.h
+++ b/distfoldd/agent.h
@@ -3,6 +3,7 @@
 
 #include <QtCore/QDateTime>
 #include <QtCore/QDir>
+#include <QtCore/QCryptographicHash>
 #include <QtNetwork/QSslSocket>
 
 #include "compressor.h"
@@ -22,7 +23,7 @@ public:
 	Q_DECLARE_FLAGS(SyncFlags, SyncFlag)
 
 public:
-	explicit Agent(QSslSocket *socket, const QDir& dir, SyncFlags flags, QObject *parent = 0);
+	explicit Agent(QSslSocket *socket, const QDir& dir, const QString& passwd, SyncFlags flags, QObject *parent = 0);
 
 	static const uint servicePort = 17451;
 
@@ -33,14 +34,16 @@ protected:
 #pragma pack(push)
 #pragma pack(1)
 	enum MessageType {
-		MSG_HELLO = 0,
-		MSG_HELLO_REPLY,
+		MSG_HELLO = 0, //args: uint32 (proto_version) + string (client challenge)
+		MSG_HELLO_REPLY, //args: string (server challenge)
+		MSG_AUTH, //args: string (challenge response)
+		MSG_AUTH_REPLY, // args: uint8 (AuthResult)
 		MSG_SET_SUBROOT, //args: string
 		MSG_FILE_LIST, //args: FileListItem[]
 		MSG_FILE_ACTIONS_REPLY, //args: ActionItem[]
 		MSG_PULL_FILE, //args: string
-		MSG_PULL_FILE_REPLY, //args: data
-		MSG_PUSH_FILE, //args: FileNameItem + data
+		MSG_PULL_FILE_REPLY, //args: file data
+		MSG_PUSH_FILE, //args: FileNameItem + file data
 		MSG_PUSH_FILE_METADATA, //args: FileListItem[]
 		MSG_DELETE_FILE, //args: string
 		MSG_BYE
@@ -49,6 +52,16 @@ protected:
 		quint32 msg;
 		quint32 len;
 	};
+	enum ProtoVersion {
+		PROTO_BAD = -1,
+		PROTO_0 = 0,
+		PROTO_1 = 1,
+		PROTO_CURRENT = PROTO_1
+	};
+	enum AuthResult {
+		AUTH_OK = 0,
+		AUTH_FAILED
+	};
 	enum FileType {
 		FILE_TYPE_NONE = 0,
 		FILE_TYPE_FILE,
@@ -169,6 +182,16 @@ protected:
 	static bool lessPathDepthThan(const QString& s1, const QString& s2);
 	static bool morePathDepthThan(const QString& s1, const QString& s2);
 
+	QByteArray encodeHelloMessage(const QByteArray& client_challenge);
+	ProtoVersion decodeHelloMessage(const QByteArray& ba, QByteArray* client_challenge);
+
+	static QByteArray hmacSha1(const QByteArray& key, const QByteArray& message);
+	QByteArray generateChallenge();
+	QByteArray generateChallengeResponse(const QByteArray& server_challenge, const QByteArray& client_challenge);
+
+	QByteArray encodeAuthReply(AuthResult result);
+	AuthResult decodeAuthReply(const QByteArray& ba);
+
 	static QFileInfoList scanFiles(const QDir& dir);
 	QByteArray encodeFileInfoList(const QFileInfoList& list);
 	RemoteFileInfoList decodeFileInfoList(const QByteArray& ba);
@@ -187,6 +210,7 @@ protected:
 protected:
 	QDir _dir;
 	QString _subPath;
+	QString _passwd;
 	SyncFlags _flags;
 	QSslSocket *_socket;
 	QByteArray _inBuf;
-- 
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