package saml
import (
"crypto/x509"
"encoding/base64"
"encoding/pem"
"errors"
"io/ioutil"
"sort"
"testing"
"time"
"github.com/kylelemons/godebug/pretty"
dsig "github.com/russellhaering/goxmldsig"
"github.com/sirupsen/logrus"
"github.com/coreos/dex/connector"
)
// responseTest maps a SAML 2.0 response object to a set of expected values.
//
// Tests are defined in the "testdata" directory and are self-signed using xmlsec1.
//
// To add a new test, define a new, unsigned SAML 2.0 response that exercises some
// case, then sign it using the "testdata/gen.sh" script.
//
// cp testdata/good-resp.tmpl testdata/( testname ).tmpl
// vim ( testname ).tmpl # Modify your template for your test case.
// vim testdata/gen.sh # Add a xmlsec1 command to the generation script.
// ./testdata/gen.sh # Sign your template.
//
// To install xmlsec1 on Fedora run:
//
// sudo dnf install xmlsec1 xmlsec1-openssl
//
// On mac:
//
// brew install Libxmlsec1
//
type responseTest struct {
// CA file and XML file of the response.
caFile string
respFile string
// Values that should be used to validate the signature.
now string
inResponseTo string
redirectURI string
entityIssuer string
// Attribute customization.
usernameAttr string
emailAttr string
groupsAttr string
// Expected outcome of the test.
wantErr bool
wantIdent connector.Identity
}
func TestGoodResponse(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/good-resp.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantIdent: connector.Identity{
UserID: "eric.chiang+okta@coreos.com",
Username: "Eric",
Email: "eric.chiang+okta@coreos.com",
EmailVerified: true,
},
}
test.run(t)
}
func TestGroups(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/good-resp.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
groupsAttr: "groups",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantIdent: connector.Identity{
UserID: "eric.chiang+okta@coreos.com",
Username: "Eric",
Email: "eric.chiang+okta@coreos.com",
EmailVerified: true,
Groups: []string{"Admins", "Everyone"},
},
}
test.run(t)
}
// TestOkta tests against an actual response from Okta.
func TestOkta(t *testing.T) {
test := responseTest{
caFile: "testdata/okta-ca.pem",
respFile: "testdata/okta-resp.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantIdent: connector.Identity{
UserID: "eric.chiang+okta@coreos.com",
Username: "Eric",
Email: "eric.chiang+okta@coreos.com",
EmailVerified: true,
},
}
test.run(t)
}
func TestBadStatus(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/bad-status.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
func TestInvalidCA(t *testing.T) {
test := responseTest{
caFile: "testdata/bad-ca.crt", // Not the CA that signed this response.
respFile: "testdata/good-resp.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
func TestUnsignedResponse(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/good-resp.tmpl", // Use the unsigned template, not the signed document.
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
func TestExpiredAssertion(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/assertion-signed.xml",
now: "2020-04-04T04:34:59.330Z", // Assertion has expired.
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
// TestAssertionSignedNotResponse ensures the connector validates SAML 2.0
// responses where the assertion is signed but the root element, the
// response, isn't.
func TestAssertionSignedNotResponse(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/assertion-signed.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantIdent: connector.Identity{
UserID: "eric.chiang+okta@coreos.com",
Username: "Eric",
Email: "eric.chiang+okta@coreos.com",
EmailVerified: true,
},
}
test.run(t)
}
func TestInvalidSubjectInResponseTo(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/assertion-signed.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "invalid-id", // Bad InResponseTo value.
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
func TestInvalidSubjectRecipient(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/assertion-signed.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://bad.com/dex/callback", // Doesn't match Recipient value.
wantErr: true,
}
test.run(t)
}
func TestInvalidAssertionAudience(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/assertion-signed.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
// EntityIssuer overrides RedirectURI when determining the expected
// audience. In this case, ensure the audience is invalid.
entityIssuer: "http://localhost:5556/dex/callback",
wantErr: true,
}
test.run(t)
}
// TestTwoAssertionFirstSigned tries to catch an edge case where an attacker
// provides a second assertion that's not signed.
func TestTwoAssertionFirstSigned(t *testing.T) {
test := responseTest{
caFile: "testdata/ca.crt",
respFile: "testdata/two-assertions-first-signed.xml",
now: "2017-04-04T04:34:59.330Z",
usernameAttr: "Name",
emailAttr: "email",
inResponseTo: "6zmm5mguyebwvajyf2sdwwcw6m",
redirectURI: "http://127.0.0.1:5556/dex/callback",
wantIdent: connector.Identity{
UserID: "eric.chiang+okta@coreos.com",
Username: "Eric",
Email: "eric.chiang+okta@coreos.com",
EmailVerified: true,
},
}
test.run(t)
}
func loadCert(ca string) (*x509.Certificate, error) {
data, err := ioutil.ReadFile(ca)
if err != nil {
return nil, err
}
block, _ := pem.Decode(data)
if block == nil {
return nil, errors.New("ca file didn't contain any PEM data")
}
return x509.ParseCertificate(block.Bytes)
}
func (r responseTest) run(t *testing.T) {
c := Config{
CA: r.caFile,
UsernameAttr: r.usernameAttr,
EmailAttr: r.emailAttr,
GroupsAttr: r.groupsAttr,
RedirectURI: r.redirectURI,
EntityIssuer: r.entityIssuer,
// Never logging in, don't need this.
SSOURL: "http://foo.bar/",
}
now, err := time.Parse(timeFormat, r.now)
if err != nil {
t.Fatalf("parse test time: %v", err)
}
conn, err := c.openConnector(logrus.New())
if err != nil {
t.Fatal(err)
}
conn.now = func() time.Time { return now }
resp, err := ioutil.ReadFile(r.respFile)
if err != nil {
t.Fatal(err)
}
samlResp := base64.StdEncoding.EncodeToString(resp)
scopes := connector.Scopes{
OfflineAccess: false,
Groups: true,
}
ident, err := conn.HandlePOST(scopes, samlResp, r.inResponseTo)
if err != nil {
if !r.wantErr {
t.Fatalf("handle response: %v", err)
}
return
}
if r.wantErr {
t.Fatalf("wanted error")
}
sort.Strings(ident.Groups)
sort.Strings(r.wantIdent.Groups)
if diff := pretty.Compare(ident, r.wantIdent); diff != "" {
t.Error(diff)
}
}
const (
defaultSSOIssuer = "http://www.okta.com/exk91cb99lKkKSYoy0h7"
defaultRedirectURI = "http://localhost:5556/dex/callback"
// Response ID embedded in our testdata.
testDataResponseID = "_fd1b3ef9-ec09-44a7-a66b-0d39c250f6a0"
)
// Deprecated: Use testing framework established above.
func runVerify(t *testing.T, ca string, resp string, shouldSucceed bool) {
cert, err := loadCert(ca)
if err != nil {
t.Fatal(err)
}
s := certStore{[]*x509.Certificate{cert}}
validator := dsig.NewDefaultValidationContext(s)
data, err := ioutil.ReadFile(resp)
if err != nil {
t.Fatal(err)
}
if _, _, err := verifyResponseSig(validator, data); err != nil {
if shouldSucceed {
t.Fatal(err)
}
} else {
if !shouldSucceed {
t.Fatalf("expected an invalid signatrue but verification has been successful")
}
}
}
// Deprecated: Use testing framework established above.
func newProvider(ssoIssuer string, redirectURI string) *provider {
if ssoIssuer == "" {
ssoIssuer = defaultSSOIssuer
}
if redirectURI == "" {
redirectURI = defaultRedirectURI
}
now, _ := time.Parse(time.RFC3339, "2017-01-24T20:48:41Z")
timeFunc := func() time.Time { return now }
return &provider{
ssoIssuer: ssoIssuer,
ssoURL: "http://idp.org/saml/sso",
now: timeFunc,
usernameAttr: "user",
emailAttr: "email",
redirectURI: redirectURI,
logger: logrus.New(),
}
}
func TestVerify(t *testing.T) {
runVerify(t, "testdata/okta-ca.pem", "testdata/okta-resp.xml", true)
}
func TestVerifyUnsignedMessageAndSignedAssertionWithRootXmlNs(t *testing.T) {
runVerify(t, "testdata/oam-ca.pem", "testdata/oam-resp.xml", true)
}
func TestVerifySignedMessageAndUnsignedAssertion(t *testing.T) {
runVerify(t, "testdata/idp-cert.pem", "testdata/idp-resp-signed-message.xml", true)
}
func TestVerifyUnsignedMessageAndSignedAssertion(t *testing.T) {
runVerify(t, "testdata/idp-cert.pem", "testdata/idp-resp-signed-assertion.xml", true)
}
func TestVerifySignedMessageAndSignedAssertion(t *testing.T) {
runVerify(t, "testdata/idp-cert.pem", "testdata/idp-resp-signed-message-and-assertion.xml", true)
}
func TestVerifyUnsignedMessageAndUnsignedAssertion(t *testing.T) {
runVerify(t, "testdata/idp-cert.pem", "testdata/idp-resp.xml", false)
}