// Execute the mutulChallengeResponse server: in this example the ocra suite is predefined both for the client and the server
// 1. Wait for the client's randomly generated question
// 2. Send to the client both the calculated ocra value (based on the ocra suite and client's + server's questions) and the server's question
// 3. Get from the client the calculated ocra value based on the client's and server's questions
// 4. Calculate the expected ocra value based on both the client's and the server's questions
// 5. Comapre the calculated ocra value with the one recived from the client
// 6. If the values are equal: the client is authenticated
// 6.1. Send an OK message to the client
// 6.2. Increase the 'ocra used' counter (to prevent replay attacks)
// 7. Else (the values are not equal) send a NOK message to the client
func mutualChallengeResponseServer(key string, counter string) {
QS := "Server 9879"
QC := <-channel
RS, err := ocra.GenerateOCRAAdvance(mutualOcraSuite, key, counter, QC+QS, mutualPassword, "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
channel <- RS
channel <- QS
RC := <-channel
cOtp, err := ocra.GenerateOCRAAdvance(mutualOcraSuite, key, counter, QS+QC, mutualPassword, "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
if RC == cOtp {
channel <- OKStr
val, _ := strconv.Atoi(counter)
counter = fmt.Sprintf("%06d", val+1)
} else {
channel <- NOKStr
}
}
func mutualChallengeResponseClient(key string, counter string) {
QC := "Client 1234"
channel <- QC
RS := <-channel
QS := <-channel
sOtp, err := ocra.GenerateOCRAAdvance(mutualOcraSuite, key, counter, QC+QS, mutualPassword, "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
RC, err := ocra.GenerateOCRAAdvance(mutualOcraSuite, key, counter, QS+QC, mutualPassword, "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
if RS == sOtp {
channel <- RC
} else {
channel <- "0"
}
fmt.Printf("Client/Server otp: (%v,%v), Ocra suite: %v, Client/Server questions: ('%v','%v'), counter: %v, password: %v\n",
RC, RS, mutualOcraSuite, QC, QS, counter, mutualPassword)
ok := <-channel
if ok == OKStr {
val, _ := strconv.Atoi(counter)
counter = fmt.Sprintf("%06d", val+1)
}
doneChannel <- ok
}
func TestOneWayChallengeResponse(t *testing.T) {
userName := usersName[0]
initAListOfUsers(t, usersName)
url := listener + ServicePath + fmt.Sprintf(cr.ConvertCommandToRequest(urlCommands[verifyUserIdentityCommand]), usersPath, userName, verifyUserIdentityChallengeToken)
res := exeCommandCheckRes(t, cr.GET_STR, url, http.StatusOK, "", cr.StringMessage{Str: getMessageStr})
var OcraData OcraData
err := json.Unmarshal([]byte(res), &OcraData)
if err != nil {
t.Errorf("Test fail: execute GET to '%v' expected to get ocra data but received: %v, error: %v",
url, res, err)
}
//Calculate the cleint OTP
otp, err := ocra.GenerateOCRAAdvance(OcraUserDataInfo.OcraSuite, secretCode,
OcraData.Counter, OcraData.ServerQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
logger.Info.Println("The calculated OTP for ocra data:", res, "is:", otp)
if err != nil {
t.Errorf("Test fail: Try to generate OCRA with the following parameters: %v, error: %v", res, err)
}
OcraData.Otp = otp
data, _ := json.Marshal(OcraData)
url = listener + ServicePath + fmt.Sprintf(cr.ConvertCommandToRequest(urlCommands[verifyUserIdentityCommand]), usersPath, userName, verifyUserIdentityOtpToken)
exeCommandCheckRes(t, cr.PUT_STR, url, http.StatusOK, string(data), cr.Match{Match: true, Message: ""})
}
func (o ocraRestful) restVerifyOcraUserIdentityCheckOtp(request *restful.Request, response *restful.Response) {
data := o.getOcra(request, response)
if data == nil {
return
}
var OcraData OcraData
err := request.ReadEntity(&OcraData)
if err != nil {
str := fmt.Sprintf("Error while reading data '%v', error: %v", OcraData, err)
o.setError(response, http.StatusNotFound, fmt.Errorf(str))
return
}
// verify client OTP
otp, err := ocra.GenerateOCRAAdvance(data.OcraSuite, string(data.Key), OcraData.Counter,
OcraData.ServerQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
response.WriteHeader(http.StatusOK)
logger.Trace.Println("OcraData:", OcraData, "otp:", otp, "client otp:", OcraData.Otp)
if OcraData.Otp == otp && err == nil {
response.WriteEntity(cr.Match{Match: true, Message: "OTP match"})
logger.Trace.Println("Server verify the OTP successfully")
} else {
logger.Trace.Println("Server calculated OTP:", otp, "is different from the one sent from the client", OcraData.Otp)
response.WriteEntity(cr.Match{Match: false, Message: "OTP doesn't match"})
}
}
// Execute the oneWayChallengeResponse client:
// 1. Wait for the ocra suite defined by the server (in this example)
// and the server's randomly generated question
// 2. Send to the server the calculated ocra value (using the ocra suite and the server's question)
// 3. Send the server's approval to the "done channel"
func oneWayChallengeResponseClient(key string) {
oneWayOcraSuite := <-channel
question := <-channel
otp, err := ocra.GenerateOCRAAdvance(oneWayOcraSuite, key, "", question, "", "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
fmt.Printf("Client otp: %v, Ocra suite: %v, Question: '%v'\n", otp, oneWayOcraSuite, question)
channel <- otp
ok := <-channel
doneChannel <- ok
}
func TestMutualChallengeResponse(t *testing.T) {
var OcraData OcraData
userName := usersName[0]
initAListOfUsers(t, usersName)
OcraData.ClientQuestion = "The client 1"
url := listener + ServicePath + fmt.Sprintf(cr.ConvertCommandToRequest(urlCommands[verifyUserIdentityCommand]), usersPath, userName, verifyUserIdentityMutualChallengeStep1Token)
data, _ := json.Marshal(cr.StringMessage{Str: OcraData.ClientQuestion})
res := exeCommandCheckRes(t, cr.PUT_STR, url, http.StatusOK, string(data), cr.StringMessage{Str: getMessageStr})
err := json.Unmarshal([]byte(res), &OcraData)
if err != nil {
t.Errorf("Test fail: execute GET to '%v' expected to get ocra data but received: %v, error: %v",
url, res, err)
t.FailNow()
}
clientOtp, err := ocra.GenerateOCRAAdvance(OcraUserDataInfo.OcraSuite, secretCode,
OcraData.Counter, OcraData.ServerQuestion+OcraData.ClientQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
serverOtp, _ := ocra.GenerateOCRAAdvance(OcraUserDataInfo.OcraSuite, secretCode,
OcraData.Counter, OcraData.ClientQuestion+OcraData.ServerQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
logger.Info.Println("The calculated client OTP for ocra data:", res, "and client question:", OcraData.ClientQuestion, "is:", clientOtp, "the server otp:", serverOtp)
if err != nil {
t.Errorf("Test fail: Try to generate OCRA with the following parameters: %v, error: %v", res, err)
t.FailNow()
}
if OcraData.Otp != serverOtp {
t.Errorf("Test fail: The calculated server OTP: %v is not as the received OTP: %v", serverOtp, OcraData.Otp)
t.FailNow()
}
url = listener + ServicePath + fmt.Sprintf(cr.ConvertCommandToRequest(urlCommands[verifyUserIdentityCommand]), usersPath, userName, verifyUserIdentityMutualChallengeStep2Token)
OcraData.Otp = clientOtp
data, _ = json.Marshal(OcraData)
exeCommandCheckRes(t, cr.PUT_STR, url, http.StatusOK, string(data), cr.Match{Match: true, Message: ""})
}
// In this example, The oneWayOcraSuite is defined by the server and sent to the client
// 1. Send the ocra suite and the "random" question to the client
// 2. Comapre the expected calculated ocra value with the one recived from the client
// 3. Based on the result of the comparison, send either an 'OK' or a 'NOK' message to the client
func oneWayChallengeResponseServer(key string) {
oneWayOcraSuite := "OCRA-1:HOTP-SHA1-6:QA08"
question := "abcd1234"
channel <- oneWayOcraSuite
channel <- question
refOtp, err := ocra.GenerateOCRAAdvance(oneWayOcraSuite, key, "", question, "", "", "")
if err != nil {
doneChannel <- fmt.Sprintf(failFmt, err)
}
otp := <-channel
if otp == refOtp {
channel <- OKStr
} else {
channel <- NOKStr
}
}
func (o ocraRestful) restVerifyOcraUserIdentityMutualChallengeStep2(request *restful.Request, response *restful.Response) {
data := o.getOcra(request, response)
if data == nil {
return
}
var OcraData OcraData
err := request.ReadEntity(&OcraData)
clientOtp, err := ocra.GenerateOCRAAdvance(data.OcraSuite, string(data.Key),
OcraData.Counter, OcraData.ServerQuestion+OcraData.ClientQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
response.WriteHeader(http.StatusOK)
logger.Trace.Println("OcraData:", OcraData, "client otp:", OcraData.Otp, "calculated client otp:", clientOtp)
if OcraData.Otp == clientOtp && err == nil {
response.WriteEntity(cr.Match{Match: true, Message: "OTP match"})
logger.Trace.Println("Server verify the OTP successfully")
} else {
logger.Trace.Println("Server calculated OTP:", clientOtp, "is different from the one sent from the client", OcraData.Otp)
response.WriteEntity(cr.Match{Match: false, Message: "Client OTP doesn't match"})
}
}
func (o ocraRestful) restVerifyOcraUserIdentityMutualChallengeStep1(request *restful.Request, response *restful.Response) {
data := o.getOcra(request, response)
if data == nil {
return
}
var OcraData OcraData
err := request.ReadEntity(&OcraData)
logger.Trace.Println("Server received data:", OcraData, "Error:", err)
OcraData.ServerQuestion = o.getRandString(OcraQuestionLen)
serverOtp, err := ocra.GenerateOCRAAdvance(data.OcraSuite, string(data.Key),
OcraData.Counter, OcraData.ClientQuestion+OcraData.ServerQuestion, OcraData.Password, OcraData.SessionId, OcraData.TimeStamp)
if err != nil {
o.setError(response, http.StatusNotFound, err)
return
}
response.WriteHeader(http.StatusOK)
logger.Trace.Println("OcraData:", OcraData, "server otp:", serverOtp)
OcraData.Otp = serverOtp
response.WriteEntity(OcraData)
}