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main_test.go
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main_test.go
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package main
import (
"bytes"
"context"
"encoding/hex"
"encoding/json"
"fmt"
"testing"
"github.com/afjoseph/plissken-auth-server/opaqueclient"
"github.com/afjoseph/plissken-auth-server/opaqueserver"
"github.com/alicebob/miniredis/v2"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/stretchr/testify/require"
)
const testAppToken = "testAppToken"
type testStorageImpl struct {
r *miniredis.Miniredis
}
func redisKey_UserEnvelope(apptoken, username string) string {
return fmt.Sprintf("auth:%s:%s:envelope", apptoken, username)
}
func redisKey_UserRequest(apptoken, username string) string {
return fmt.Sprintf("auth:%s:%s:request", apptoken, username)
}
func redisKey_SessionToken(apptoken, username string) string {
return fmt.Sprintf("auth:%s:%s:token", apptoken, username)
}
func redisKey_AuthNonces(apptoken, username string) string {
return fmt.Sprintf("auth:%s:%s:requests", apptoken, username)
}
func (s testStorageImpl) StoreUserRequest(ctx context.Context, apptoken, username string, req *opaqueserver.UserRequest) error {
b, err := json.Marshal(req)
if err != nil {
return errors.Wrap(err, "")
}
err = s.r.Set(redisKey_UserRequest(apptoken, username), string(b))
if err != nil {
return errors.Wrap(err, "")
}
return nil
}
func (s testStorageImpl) LoadUserRequest(ctx context.Context, apptoken, username string) (*opaqueserver.UserRequest, error) {
var req opaqueserver.UserRequest
str, err := s.r.Get(redisKey_UserRequest(apptoken, username))
if err != nil {
return nil, errors.Wrap(err, "")
}
if str == "" {
return nil, errors.New("saved data is nil")
}
err = json.Unmarshal([]byte(str), &req)
if err != nil {
return nil, errors.Wrap(err, "")
}
return &req, nil
}
func (s testStorageImpl) HasUserRequest(ctx context.Context, apptoken, username string) (bool, error) {
return s.r.Exists(redisKey_UserRequest(apptoken, username)), nil
}
func (s testStorageImpl) StoreUserEnvelope(ctx context.Context, apptoken, username string, req *opaqueserver.UserEnvelope) error {
b, err := json.Marshal(req)
if err != nil {
return errors.Wrap(err, "")
}
s.r.Set(redisKey_UserEnvelope(apptoken, username), string(b))
if err != nil {
return errors.Wrap(err, "")
}
return nil
}
func (s testStorageImpl) LoadUserEnvelope(ctx context.Context, apptoken, username string) (*opaqueserver.UserEnvelope, error) {
var req opaqueserver.UserEnvelope
str, err := s.r.Get(redisKey_UserEnvelope(apptoken, username))
if err != nil {
return nil, errors.Wrap(err, "")
}
err = json.Unmarshal([]byte(str), &req)
if err != nil {
return nil, errors.Wrap(err, "")
}
return &req, nil
}
func (s testStorageImpl) StoreAuthNonce(
ctx context.Context,
apptoken, username string,
nonce []byte) error {
_, err := s.r.Lpush(
redisKey_AuthNonces(apptoken, username),
hex.EncodeToString(nonce))
if err != nil {
return errors.Wrap(err, "")
}
fmt.Println(s.r.Dump())
return nil
}
func (s testStorageImpl) HasAuthNonce(
ctx context.Context,
apptoken, username string,
inputAuthNonce []byte) (bool, error) {
t, err := s.r.List(redisKey_AuthNonces(apptoken, username))
if err != nil {
return false, errors.Wrap(err, "")
}
for _, v := range t {
b, err := hex.DecodeString(v)
if err != nil {
// TODO <22-04-2022, afjoseph> Deal with corruption
logrus.Errorf("Failed to decode auth nonce: %s", v)
}
if bytes.Equal(b, inputAuthNonce) {
return true, nil
}
}
return false, nil
}
func doPasswordRegistration(ctx context.Context, s *opaqueserver.Server, username, password string) error {
// 1. Client starts the OPRF process
_, finData, evalReq, err := opaqueclient.MakeOprfRequest(password)
if err != nil {
return err
}
// 2. Client -> Server first msg:
// - the initial parameters to the OPRF function from the client-side
// 3. Server receives and evaluates OPRF
// Does two things:
// a) calls an interface function to store the state of the registration
//
// Store request
// u.username
// u.PubU
// u.Ku -> created now
// not our concern, but we can expire the request after X seconds
// to avoid overloading
// And evaluate the OPRF
sEval, err := s.HandleNewUserRequest(ctx, testAppToken, username, evalReq)
if err != nil {
return err
}
// 4. Server -> Client: send OPRF evaluation
// 5. Client receives and finalizes OPRF
// XXX <27-02-22, afjoseph> You can't "recreate" the OPRF request using the
// same password here, since it will yield a different result: the function
// evaluation you and the server negotiated should remain the same.
// 6. Client hardens OPRF's result: this will be their password
// 7. Client makes envU, encodes it and encrypts it
envU, envUNonce, pubU, salt, err := opaqueclient.MakeEnvU(finData, sEval, s.PubS)
if err != nil {
return err
}
fmt.Printf("envU = %+v\n", envU)
// 8. Client sends envU, envUNonce, pubU, and salt to server and
// deletes everything else
// 9. Server stores (envU, pubS, pubU, privS, and kU)
err = s.StoreUserData(ctx, testAppToken, username, pubU, envU,
envUNonce, salt)
if err != nil {
return err
}
return nil
}
func doPasswordAuthentication(
ctx context.Context,
s *opaqueserver.Server,
username, password string,
) ([]byte, error) {
// 1. Client starts the OPRF process
_, finData, evalReq, err := opaqueclient.MakeOprfRequest(password)
if err != nil {
return nil, err
}
// 2. Client -> Server first msg:
// - the initial parameters to the OPRF function from the client-side
// 3. Server receives and evaluates OPRF
sAuthEval, envU, envUNonce,
rwdUSalt, authNonce, err := s.HandleNewUserAuthentication(
context.Background(), testAppToken, username, evalReq)
if err != nil {
return nil, err
}
// 4. Server -> Client: send OPRF evaluation
// 5. Client receives and finalizes OPRF
// 6. Client hardens OPRF's result: this will be their password
// 7. Client decrypts envU and derives shared key
sessionToken, err := opaqueclient.DeriveSessionToken(
finData,
sAuthEval,
envU, envUNonce,
rwdUSalt,
authNonce)
if err != nil {
return nil, err
}
fmt.Printf("sessionToken = %+v\n", sessionToken)
return sessionToken, nil
}
func TestProtocol(t *testing.T) {
t.Run("Happy path: register -> login -> access private resource", func(t *testing.T) {
username := "truebeef"
password := "bunnyfoofoo"
s, err := opaqueserver.NewServer(testStorageImpl{miniredis.RunT(t)}, nil)
require.NoError(t, err)
fmt.Printf("s = %+v\n", s)
err = doPasswordRegistration(context.Background(), s, username, password)
require.NoError(t, err)
sessionToken, err := doPasswordAuthentication(context.Background(), s, username, password)
require.NoError(t, err)
ok, err := s.IsAuthenticated(context.Background(),
testAppToken, username, sessionToken)
require.NoError(t, err)
require.True(t, ok)
})
t.Run("register -> login with same username but different password should fail", func(t *testing.T) {
username := "truebeef"
password := "bunnyfoofoo"
s, err := opaqueserver.NewServer(testStorageImpl{miniredis.RunT(t)}, nil)
require.NoError(t, err)
fmt.Printf("s = %+v\n", s)
err = doPasswordRegistration(context.Background(), s, username, password)
require.NoError(t, err)
password = "notbunnyfoofoo"
_, err = doPasswordAuthentication(context.Background(), s, username, password)
require.NotNil(t, err)
require.Contains(t, err.Error(), "message authentication failed")
})
t.Run("multiple registrations with the same credentials should yield different session tokens", func(t *testing.T) {
username := "truebeef"
password := "bunnyfoofoo"
s, err := opaqueserver.NewServer(testStorageImpl{miniredis.RunT(t)}, nil)
require.NoError(t, err)
err = doPasswordRegistration(context.Background(), s, username, password)
require.NoError(t, err)
sessionToken1, err := doPasswordAuthentication(context.Background(), s, username, password)
require.NoError(t, err)
require.NotNil(t, sessionToken1)
err = doPasswordRegistration(context.Background(), s, username, password)
require.NoError(t, err)
sessionToken2, err := doPasswordAuthentication(context.Background(), s, username, password)
require.NoError(t, err)
require.NotNil(t, sessionToken2)
require.NotEqual(t, sessionToken1[:], sessionToken2[:])
})
t.Run("multiple logins with the same credentials should yield different session tokens", func(t *testing.T) {
username := "truebeef"
password := "bunnyfoofoo"
s, err := opaqueserver.NewServer(testStorageImpl{miniredis.RunT(t)}, nil)
require.NoError(t, err)
err = doPasswordRegistration(context.Background(), s, username, password)
require.NoError(t, err)
sessionToken1, err := doPasswordAuthentication(context.Background(), s, username, password)
require.NoError(t, err)
require.NotNil(t, sessionToken1)
sessionToken2, err := doPasswordAuthentication(context.Background(), s, username, password)
require.NoError(t, err)
require.NotNil(t, sessionToken2)
require.NotEqual(t, sessionToken1[:], sessionToken2[:])
})
}