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package integration
import (
"context"
"fmt"
"os"
"testing"
"go.mongodb.org/mongo-driver/bson/bsontype"
"go.mongodb.org/mongo-driver/internal/testutil"
"go.mongodb.org/mongo-driver/mongo/description"
"go.mongodb.org/mongo-driver/mongo/writeconcern"
"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
"go.mongodb.org/mongo-driver/x/mongo/driver"
"go.mongodb.org/mongo-driver/x/mongo/driver/connstring"
)
type scramTestCase struct {
username string
password string
mechanisms []string
altPassword string
}
func TestSCRAM(t *testing.T) {
if os.Getenv("AUTH") != "auth" {
t.Skip("Skipping because authentication is required")
}
server, err := testutil.Topology(t).SelectServer(context.Background(), description.WriteSelector())
noerr(t, err)
serverConnection, err := server.Connection(context.Background())
noerr(t, err)
defer serverConnection.Close()
if !serverConnection.Description().WireVersion.Includes(7) {
t.Skip("Skipping because MongoDB 4.0 is needed for SCRAM-SHA-256")
}
// Unicode constants for testing
var romanFour = "\u2163" // ROMAN NUMERAL FOUR -> SASL prepped is "IV"
var romanNine = "\u2168" // ROMAN NUMERAL NINE -> SASL prepped is "IX"
testUsers := []scramTestCase{
// SCRAM spec test steps 1-3
{username: "sha1", password: "sha1", mechanisms: []string{"SCRAM-SHA-1"}},
{username: "sha256", password: "sha256", mechanisms: []string{"SCRAM-SHA-256"}},
{username: "both", password: "both", mechanisms: []string{"SCRAM-SHA-1", "SCRAM-SHA-256"}},
// SCRAM spec test step 4
{username: "IX", password: "IX", mechanisms: []string{"SCRAM-SHA-256"}, altPassword: "I\u00ADX"},
{username: romanNine, password: romanFour, mechanisms: []string{"SCRAM-SHA-256"}, altPassword: "I\u00ADV"},
}
// Verify that test (root) user is authenticated. If this fails, the
// rest of the test can't succeed.
wc := writeconcern.New(writeconcern.WMajority())
collOne := testutil.ColName(t)
testutil.DropCollection(t, testutil.DBName(t), collOne)
testutil.InsertDocs(t, testutil.DBName(t),
collOne, wc, bsoncore.BuildDocument(nil, bsoncore.AppendStringElement(nil, "name", "scram_test")),
)
// Test step 1: Create users for test cases
err = createScramUsers(t, server, testUsers)
if err != nil {
t.Fatal(err)
}
// Step 2 and 3a: For each auth mechanism, "SCRAM-SHA-1", "SCRAM-SHA-256"
// and "negotiate" (a fake, placeholder mechanism), iterate over each user
// and ensure that each mechanism that should succeed does so and each
// that should fail does so.
for _, m := range []string{"SCRAM-SHA-1", "SCRAM-SHA-256", "negotiate"} {
for _, c := range testUsers {
t.Run(
fmt.Sprintf("%s %s", c.username, m),
func(t *testing.T) {
err := testScramUserAuthWithMech(t, c, m)
if m == "negotiate" || hasAuthMech(c.mechanisms, m) {
noerr(t, err)
} else {
autherr(t, err)
}
},
)
}
}
// Step 3b: test non-existing user with negotiation fails with
// an auth.Error type.
bogus := scramTestCase{username: "eliot", password: "trustno1"}
err = testScramUserAuthWithMech(t, bogus, "negotiate")
autherr(t, err)
// XXX Step 4: test alternate password forms
for _, c := range testUsers {
if c.altPassword == "" {
continue
}
c.password = c.altPassword
t.Run(
fmt.Sprintf("%s alternate password", c.username),
func(t *testing.T) {
err := testScramUserAuthWithMech(t, c, "SCRAM-SHA-256")
noerr(t, err)
},
)
}
}
func hasAuthMech(mechs []string, m string) bool {
for _, v := range mechs {
if v == m {
return true
}
}
return false
}
func testScramUserAuthWithMech(t *testing.T, c scramTestCase, mech string) error {
t.Helper()
cs := testutil.ConnString(t)
cs.Username = c.username
cs.Password = c.password
cs.AuthSource = testutil.DBName(t)
switch mech {
case "negotiate":
cs.AuthMechanism = ""
default:
cs.AuthMechanism = mech
}
return runScramAuthTest(t, cs)
}
func runScramAuthTest(t *testing.T, cs connstring.ConnString) error {
t.Helper()
topology := testutil.TopologyWithConnString(t, cs)
server, err := topology.SelectServer(context.Background(), description.WriteSelector())
noerr(t, err)
cmd := bsoncore.BuildDocument(nil, bsoncore.AppendInt32Element(nil, "dbstats", 1))
_, err = testutil.RunCommand(t, server, testutil.DBName(t), cmd)
return err
}
func createScramUsers(t *testing.T, s driver.Server, cases []scramTestCase) error {
db := testutil.DBName(t)
for _, c := range cases {
var values []bsoncore.Value
for _, v := range c.mechanisms {
values = append(values, bsoncore.Value{Type: bsontype.String, Data: bsoncore.AppendString(nil, v)})
}
newUserCmd := bsoncore.BuildDocumentFromElements(nil,
bsoncore.AppendStringElement(nil, "createUser", c.username),
bsoncore.AppendStringElement(nil, "pwd", c.password),
bsoncore.AppendArrayElement(nil, "roles", bsoncore.BuildArray(nil,
bsoncore.Value{Type: bsontype.EmbeddedDocument, Data: bsoncore.BuildDocumentFromElements(nil,
bsoncore.AppendStringElement(nil, "role", "readWrite"),
bsoncore.AppendStringElement(nil, "db", db),
)},
)),
bsoncore.AppendArrayElement(nil, "mechanisms", bsoncore.BuildArray(nil, values...)),
)
_, err := testutil.RunCommand(t, s, db, newUserCmd)
if err != nil {
return fmt.Errorf("Couldn't create user '%s' on db '%s': %v", c.username, testutil.DBName(t), err)
}
}
return nil
}
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