[PD1] Cleaned up protocol,database and receiving multiple messageInfos
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SHA256:aiLbdlPwXKJS5wMnghdtod0SPy8imZjlVvCyUX9DJNk
6 changed files with 347 additions and 231 deletions
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@ -30,52 +30,46 @@ func Run() {
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panic("Insufficient arguments for 'send' command. Usage: send <UID> <SUBJECT>")
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}
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uid := flag.Arg(1)
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subject := flag.Arg(2)
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messageBody := readMessageBody()
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plainSubject := flag.Arg(2)
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plainBody := readStdin("Enter message content (limited to 1000 bytes):")
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//Turn content to bytes
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marshaledSubject := Marshal(subject)
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marshaledBody := Marshal(messageBody)
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plainSubjectBytes := Marshal(plainSubject)
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plainBodyBytes := Marshal(plainBody)
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cl := networking.NewClient[protocol.Packet](&clientKeyStore)
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defer cl.Connection.Conn.Close()
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uidCert := getUserCert(cl, uid)
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if uidCert == nil {
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receiverCert := getUserCert(cl, uid)
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if receiverCert == nil {
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return
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}
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encryptedSubject := clientKeyStore.EncryptMessageContent(uidCert, marshaledSubject)
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encryptedBody := clientKeyStore.EncryptMessageContent(uidCert, marshaledBody)
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submitMessage := protocol.NewSubmitMessagePacket(uid, encryptedSubject, encryptedBody)
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if !cl.Connection.Send(submitMessage) {
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subject := clientKeyStore.EncryptMessageContent(receiverCert, plainSubjectBytes)
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body := clientKeyStore.EncryptMessageContent(receiverCert, plainBodyBytes)
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sendMsgPacket := protocol.NewSendMsgPacket(uid, subject, body)
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if !cl.Connection.Send(sendMsgPacket) {
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return
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}
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cl.Connection.Conn.Close()
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case "askqueue":
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cl := networking.NewClient[protocol.Packet](&clientKeyStore)
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defer cl.Connection.Conn.Close()
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requestUnreadMsgsQueuePacket := protocol.NewRequestUnreadMsgsQueuePacket()
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if !cl.Connection.Send(requestUnreadMsgsQueuePacket) {
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return
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}
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serverMessagePackets, certificates := getManyMessagesInfo(cl)
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var clientMessages []ClientMessageInfo
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for _, message := range serverMessagePackets {
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senderCert, ok := certificates[message.FromUID]
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if ok {
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decryptedSubjectBytes := clientKeyStore.DecryptMessageContent(senderCert, message.Subject)
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subject := Unmarshal(decryptedSubjectBytes)
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clientMessage := newClientMessageInfo(message.Num, message.FromUID, subject, message.Timestamp)
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clientMessages = append(clientMessages, clientMessage)
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pageInput := flag.Arg(1)
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page := 1
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if pageInput != "" {
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if val, err := strconv.Atoi(pageInput); err == nil {
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page = max(1, val)
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}
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}
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pageSizeInput := flag.Arg(2)
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pageSize := 5
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if pageSizeInput != "" {
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if val, err := strconv.Atoi(pageSizeInput); err == nil {
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pageSize = max(1, val)
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}
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}
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//Sort the messages
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sort.Slice(clientMessages, func(i, j int) bool {
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return clientMessages[i].Num > clientMessages[j].Num
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})
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showMessagesInfo(clientMessages)
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cl := networking.NewClient[protocol.Packet](&clientKeyStore)
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defer cl.Connection.Conn.Close()
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askQueue(cl,clientKeyStore, page, pageSize)
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case "getmsg":
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if flag.NArg() < 2 {
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@ -84,26 +78,26 @@ func Run() {
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numString := flag.Arg(1)
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cl := networking.NewClient[protocol.Packet](&clientKeyStore)
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defer cl.Connection.Conn.Close()
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num,err :=strconv.Atoi(numString)
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if err!=nil{
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log.Panicln("NUM argument provided is not a number")
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}
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packet := protocol.NewRequestMsgPacket(num)
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cl.Connection.Send(packet)
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num, err := strconv.Atoi(numString)
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if err != nil {
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log.Panicln("NUM argument provided is not a number")
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}
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packet := protocol.NewGetMsgPacket(num)
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cl.Connection.Send(packet)
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receivedMsgPacket, active := cl.Connection.Receive()
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if !active {
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return
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}
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answerGetMsg := protocol.UnmarshalAnswerGetMsg(receivedMsgPacket.Body)
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senderCert := getUserCert(cl, answerGetMsg.FromUID)
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decSubjectBytes := clientKeyStore.DecryptMessageContent(senderCert, answerGetMsg.Subject)
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decBodyBytes := clientKeyStore.DecryptMessageContent(senderCert, answerGetMsg.Body)
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subject := Unmarshal(decSubjectBytes)
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body := Unmarshal(decBodyBytes)
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message := newClientMessage(answerGetMsg.FromUID, answerGetMsg.ToUID, subject, body, answerGetMsg.Timestamp)
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showMessage(message)
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receivedMsgPacket,active := cl.Connection.Receive()
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if !active{
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return
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}
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serverMessagePacket := protocol.UnmarshalServerMessagePacket(receivedMsgPacket.Body)
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senderCert := getUserCert(cl, serverMessagePacket.FromUID)
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decryptedSubjectBytes := clientKeyStore.DecryptMessageContent(senderCert, serverMessagePacket.Subject)
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decryptedBodyBytes := clientKeyStore.DecryptMessageContent(senderCert, serverMessagePacket.Body)
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subject := Unmarshal(decryptedSubjectBytes)
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body := Unmarshal(decryptedBodyBytes)
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message := newClientMessage(serverMessagePacket.FromUID, serverMessagePacket.ToUID, subject, body, serverMessagePacket.Timestamp)
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showMessage(message)
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case "help":
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showHelp()
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@ -114,43 +108,33 @@ func Run() {
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}
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func getUserCert(cl networking.Client[protocol.Packet], uid string) *x509.Certificate {
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certRequestPacket := protocol.NewRequestUserCertPacket(uid)
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if !cl.Connection.Send(certRequestPacket) {
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getUserCertPacket := protocol.NewGetUserCertPacket(uid)
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if !cl.Connection.Send(getUserCertPacket) {
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return nil
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}
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var certPacket *protocol.Packet
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certPacket, active := cl.Connection.Receive()
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var answerGetUserCertPacket *protocol.Packet
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answerGetUserCertPacket, active := cl.Connection.Receive()
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if !active {
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return nil
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}
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uidCertInBytes := protocol.UnmarshalSendUserCertPacket(certPacket.Body)
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uidCert, err := x509.ParseCertificate(uidCertInBytes.Certificate)
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answerGetUserCert := protocol.UnmarshalAnswerGetUserCert(answerGetUserCertPacket.Body)
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userCert, err := x509.ParseCertificate(answerGetUserCert.Certificate)
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if err != nil {
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return nil
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}
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return uidCert
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return userCert
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}
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func getManyMessagesInfo(cl networking.Client[protocol.Packet]) ([]protocol.ServerMessageInfoPacket, map[string]*x509.Certificate) {
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//Create the slice to hold the incoming messages before decrypting
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//Create the map to hold the sender certificates
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//Create sync mutexes
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serverMessageInfoPackets := []protocol.ServerMessageInfoPacket{}
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//Run while message isn't the last one
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msg := protocol.ServerMessageInfoPacket{}
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for !msg.Last {
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sendMsgPacket, active := cl.Connection.Receive()
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if !active {
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return nil, nil
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}
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msg = protocol.UnmarshalServerMessageInfoPacket(sendMsgPacket.Body)
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//Lock and append
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serverMessageInfoPackets = append(serverMessageInfoPackets, msg)
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func getManyMessagesInfo(cl networking.Client[protocol.Packet]) (protocol.AnswerGetUnreadMsgsInfo, map[string]*x509.Certificate) {
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answerGetUnreadMsgsInfoPacket, active := cl.Connection.Receive()
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if !active {
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return protocol.NewAnswerGetUnreadMsgsInfo(0, 0, nil), nil
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}
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answerGetUnreadMsgsInfo := protocol.UnmarshalAnswerGetUnreadMsgsInfo(answerGetUnreadMsgsInfoPacket.Body)
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//Create Set of needed certificates
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senderSet := map[string]bool{}
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for _, messageInfo := range serverMessageInfoPackets {
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for _, messageInfo := range answerGetUnreadMsgsInfo.MessagesInfo {
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senderSet[messageInfo.FromUID] = true
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}
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certificatesMap := map[string]*x509.Certificate{}
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@ -159,5 +143,37 @@ func getManyMessagesInfo(cl networking.Client[protocol.Packet]) ([]protocol.Serv
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senderCert := getUserCert(cl, senderUID)
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certificatesMap[senderUID] = senderCert
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}
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return serverMessageInfoPackets, certificatesMap
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return answerGetUnreadMsgsInfo, certificatesMap
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}
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func askQueue(cl networking.Client[protocol.Packet],clientKeyStore cryptoUtils.KeyStore, page int, pageSize int) {
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requestUnreadMsgsQueuePacket := protocol.NewGetUnreadMsgsInfoPacket(page, pageSize)
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if !cl.Connection.Send(requestUnreadMsgsQueuePacket) {
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return
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}
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unreadMsgsInfo, certificates := getManyMessagesInfo(cl)
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var clientMessages []ClientMessageInfo
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for _, message := range unreadMsgsInfo.MessagesInfo {
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senderCert, ok := certificates[message.FromUID]
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if ok {
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decryptedSubjectBytes := clientKeyStore.DecryptMessageContent(senderCert, message.Subject)
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subject := Unmarshal(decryptedSubjectBytes)
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clientMessage := newClientMessageInfo(message.Num, message.FromUID, subject, message.Timestamp)
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clientMessages = append(clientMessages, clientMessage)
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}
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}
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//Sort the messages
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sort.Slice(clientMessages, func(i, j int) bool {
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return clientMessages[i].Num > clientMessages[j].Num
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})
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action := showMessagesInfo(unreadMsgsInfo.Page, unreadMsgsInfo.NumPages, clientMessages)
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switch action {
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case -1:
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askQueue(cl, clientKeyStore , max(1,unreadMsgsInfo.Page-1) , pageSize)
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case 0:
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return
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case 1:
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askQueue(cl, clientKeyStore , max(1,unreadMsgsInfo.Page+1) , pageSize)
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}
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}
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@ -4,10 +4,11 @@ import (
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"bufio"
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"fmt"
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"os"
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"strings"
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)
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func readMessageBody() string {
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fmt.Println("Enter message content (limited to 1000 bytes):")
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func readStdin(message string) string {
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fmt.Println(message)
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scanner := bufio.NewScanner(os.Stdin)
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scanner.Scan()
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// FIX: make sure this doesnt die
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@ -36,15 +37,63 @@ func showHelp() {
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fmt.Println("help: Imprime instruções de uso do programa.")
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}
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func showMessagesInfo(messages []ClientMessageInfo) {
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func showMessagesInfo(page int, numPages int, messages []ClientMessageInfo) int {
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if messages == nil {
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fmt.Println("No unread messages in the queue")
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return 0
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}
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for _, message := range messages {
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fmt.Printf("%v:%v:%v:%v\n", message.Num, message.FromUID, message.Timestamp, message.Subject)
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}
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fmt.Printf("Page %v/%v\n",page,numPages)
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return messagesInfoPageNavigation(page, numPages)
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}
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func showMessage(message ClientMessage) {
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fmt.Printf("From:%v\n", message.FromUID)
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fmt.Printf("To:%v\n", message.ToUID)
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fmt.Printf("Subject:%v\n", message.Subject)
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fmt.Printf("Body:%v\n", message.Body)
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func messagesInfoPageNavigation(page int, numPages int) int {
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var action string
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switch page {
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case 1:
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if page == numPages {
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action = readStdin("Actions: quit")
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} else {
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action = readStdin("Actions: quit/next")
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}
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case numPages:
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action = readStdin("Actions: prev/quit")
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default:
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action = readStdin("prev/quit/next")
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}
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switch strings.ToLower(action) {
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case "prev":
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if page == 1 {
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fmt.Println("Unavailable action: Already in first page")
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messagesInfoPageNavigation(page, numPages)
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} else {
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return -1
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}
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case "quit":
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return 0
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case "next":
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if page == numPages {
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fmt.Println("Unavailable action: Already in last page")
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messagesInfoPageNavigation(page, numPages)
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} else {
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return 1
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}
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default:
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fmt.Println("Unknown action")
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messagesInfoPageNavigation(page, numPages)
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}
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return 0
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}
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func showMessage(message ClientMessage) {
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fmt.Printf("From: %s\n", message.FromUID)
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fmt.Printf("To: %s\n", message.ToUID)
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fmt.Printf("Subject: %s\n", message.Subject)
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fmt.Printf("Body: %s\n", message.Body)
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}
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