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Check username claim is unchanged for oidc.

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Also add integration tests for claims changing.
This commit is contained in:
Margo Crawford 2021-12-14 11:59:52 -08:00
parent b098435290
commit 0cd086cf9c
5 changed files with 145 additions and 15 deletions
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18
internal/oidc/token/token_handler.go
View File

@ -6,6 +6,7 @@ package token
import (
"context"
"errors"
"net/http"
"github.com/ory/fosite"
@ -142,12 +143,23 @@ func upstreamOIDCRefresh(ctx context.Context, session *psession.PinnipedSession,
oldDownstreamSubject := session.Fosite.Claims.Subject
oldSub, err := upstreamoidc.ExtractUpstreamSubjectFromDownstream(oldDownstreamSubject)
if err != nil {
return errorsx.WithStack(errUpstreamRefreshError.WithHintf(
"Could not verify upstream refresh subject against previous value").WithWrap(err).WithDebugf("provider name: %q, provider type: %q", s.ProviderName, s.ProviderType))
return errorsx.WithStack(errUpstreamRefreshError.WithHintf("Upstream refresh failed.").
WithWrap(err).WithDebugf("provider name: %q, provider type: %q", s.ProviderName, s.ProviderType))
}
if oldSub != newSub {
return errorsx.WithStack(errUpstreamRefreshError.WithHintf(
"Subject in upstream refresh does not match previous value").WithDebugf("provider name: %q, provider type: %q", s.ProviderName, s.ProviderType))
"Upstream refresh failed.").WithWrap(errors.New("subject in upstream refresh does not match previous value")).WithDebugf("provider name: %q, provider type: %q", s.ProviderName, s.ProviderType))
}
usernameClaim := p.GetUsernameClaim()
newUsername := claims[usernameClaim]
// its possible this won't be returned.
// but if it is, verify that it hasn't changed.
if newUsername != nil {
oldUsername := session.Fosite.Claims.Extra["username"]
if oldUsername != newUsername {
return errorsx.WithStack(errUpstreamRefreshError.WithHintf(
"Upstream refresh failed.").WithWrap(errors.New("username in upstream refresh does not match previous value")).WithDebugf("provider name: %q, provider type: %q", s.ProviderName, s.ProviderType))
}
}
}

89
internal/oidc/token/token_handler_test.go
View File

@ -22,8 +22,6 @@ import (
"testing"
"time"
"go.pinniped.dev/pkg/oidcclient/oidctypes"
"github.com/ory/fosite"
fositeoauth2 "github.com/ory/fosite/handler/oauth2"
"github.com/ory/fosite/handler/openid"
@ -54,6 +52,7 @@ import (
"go.pinniped.dev/internal/psession"
"go.pinniped.dev/internal/testutil"
"go.pinniped.dev/internal/testutil/oidctestutil"
"go.pinniped.dev/pkg/oidcclient/oidctypes"
)
const (
@ -1067,6 +1066,30 @@ func TestRefreshGrant(t *testing.T) {
),
},
},
{
name: "refresh grant with unchanged username claim",
idps: oidctestutil.NewUpstreamIDPListerBuilder().WithOIDC(
upstreamOIDCIdentityProviderBuilder().WithUsernameClaim("username-claim").WithValidatedTokens(&oidctypes.Token{
IDToken: &oidctypes.IDToken{
Claims: map[string]interface{}{
"some-claim": "some-value",
"sub": "some-subject",
"username-claim": goodUsername,
},
},
}).WithRefreshedTokens(refreshedUpstreamTokensWithIDAndRefreshTokens()).Build()),
authcodeExchange: authcodeExchangeInputs{
customSessionData: initialUpstreamOIDCCustomSessionData(),
modifyAuthRequest: func(r *http.Request) { r.Form.Set("scope", "openid offline_access") },
want: happyAuthcodeExchangeTokenResponseForOpenIDAndOfflineAccess(initialUpstreamOIDCCustomSessionData()),
},
refreshRequest: refreshRequestInputs{
want: happyRefreshTokenResponseForOpenIDAndOfflineAccess(
upstreamOIDCCustomSessionDataWithNewRefreshToken(oidcUpstreamRefreshedRefreshToken),
refreshedUpstreamTokensWithIDAndRefreshTokens(),
),
},
},
{
name: "happy path refresh grant without openid scope granted (no id token returned)",
idps: oidctestutil.NewUpstreamIDPListerBuilder().WithOIDC(
@ -1617,7 +1640,67 @@ func TestRefreshGrant(t *testing.T) {
wantErrorResponseBody: here.Doc(`
{
"error": "error",
"error_description": "Error during upstream refresh. Subject in upstream refresh does not match previous value"
"error_description": "Error during upstream refresh. Upstream refresh failed."
}
`),
},
},
},
{
name: "refresh grant with claims but not the subject claim",
idps: oidctestutil.NewUpstreamIDPListerBuilder().WithOIDC(
upstreamOIDCIdentityProviderBuilder().WithValidatedTokens(&oidctypes.Token{
IDToken: &oidctypes.IDToken{
Claims: map[string]interface{}{
"some-claim": "some-value",
},
},
}).WithRefreshedTokens(refreshedUpstreamTokensWithIDAndRefreshTokens()).Build()),
authcodeExchange: authcodeExchangeInputs{
customSessionData: initialUpstreamOIDCCustomSessionData(),
modifyAuthRequest: func(r *http.Request) { r.Form.Set("scope", "openid offline_access") },
want: happyAuthcodeExchangeTokenResponseForOpenIDAndOfflineAccess(initialUpstreamOIDCCustomSessionData()),
},
refreshRequest: refreshRequestInputs{
want: tokenEndpointResponseExpectedValues{
wantUpstreamRefreshCall: happyOIDCUpstreamRefreshCall(),
wantUpstreamOIDCValidateTokenCall: happyUpstreamValidateTokenCall(refreshedUpstreamTokensWithIDAndRefreshTokens()),
wantStatus: http.StatusUnauthorized,
wantErrorResponseBody: here.Doc(`
{
"error": "error",
"error_description": "Error during upstream refresh. Upstream refresh failed."
}
`),
},
},
},
{
name: "refresh grant with changed username claim",
idps: oidctestutil.NewUpstreamIDPListerBuilder().WithOIDC(
upstreamOIDCIdentityProviderBuilder().WithUsernameClaim("username-claim").WithValidatedTokens(&oidctypes.Token{
IDToken: &oidctypes.IDToken{
Claims: map[string]interface{}{
"some-claim": "some-value",
"sub": "some-subject",
"username-claim": "some-changed-username",
},
},
}).WithRefreshedTokens(refreshedUpstreamTokensWithIDAndRefreshTokens()).Build()),
authcodeExchange: authcodeExchangeInputs{
customSessionData: initialUpstreamOIDCCustomSessionData(),
modifyAuthRequest: func(r *http.Request) { r.Form.Set("scope", "openid offline_access") },
want: happyAuthcodeExchangeTokenResponseForOpenIDAndOfflineAccess(initialUpstreamOIDCCustomSessionData()),
},
refreshRequest: refreshRequestInputs{
want: tokenEndpointResponseExpectedValues{
wantUpstreamRefreshCall: happyOIDCUpstreamRefreshCall(),
wantUpstreamOIDCValidateTokenCall: happyUpstreamValidateTokenCall(refreshedUpstreamTokensWithIDAndRefreshTokens()),
wantStatus: http.StatusUnauthorized,
wantErrorResponseBody: here.Doc(`
{
"error": "error",
"error_description": "Error during upstream refresh. Upstream refresh failed."
}
`),
},

2
internal/upstreamoidc/upstreamoidc.go
View File

@ -242,7 +242,7 @@ func ExtractUpstreamSubjectFromDownstream(downstreamSubject string) (string, err
if !strings.Contains(downstreamSubject, "?sub=") {
return "", errors.New("downstream subject did not contain original upstream subject")
}
return strings.SplitN(downstreamSubject, "?sub=", 2)[1], nil // TODO test for ?sub= occurring twice (imagine if you ran the supervisor with another supervisor as the upstream idp...)
return strings.SplitN(downstreamSubject, "?sub=", 2)[1], nil
}
// ValidateToken will validate the ID token. It will also merge the claims from the userinfo endpoint response,

39
internal/upstreamoidc/upstreamoidc_test.go
View File

@ -910,6 +910,45 @@ func TestProviderConfig(t *testing.T) {
}
})
t.Run("ExtractUpstreamSubjectFromDownstream", func(t *testing.T) {
tests := []struct {
name string
downstreamSubject string
wantUpstreamSubject string
wantErr string
}{
{
name: "happy path",
downstreamSubject: "https://some-issuer?sub=some-subject",
wantUpstreamSubject: "some-subject",
},
{
name: "subject in a subject",
downstreamSubject: "https://some-other-issuer?sub=https://some-issuer?sub=some-subject",
wantUpstreamSubject: "https://some-issuer?sub=some-subject",
},
{
name: "doesn't contain sub=",
downstreamSubject: "something-invalid",
wantErr: "downstream subject did not contain original upstream subject",
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
actualUpstreamSubject, err := ExtractUpstreamSubjectFromDownstream(tt.downstreamSubject)
if tt.wantErr != "" {
require.Error(t, err)
require.Equal(t, tt.wantErr, err.Error())
} else {
require.NoError(t, err)
require.Equal(t, tt.wantUpstreamSubject, actualUpstreamSubject)
}
})
}
})
t.Run("ExchangeAuthcodeAndValidateTokens", func(t *testing.T) {
tests := []struct {
name string

12
test/integration/supervisor_login_test.go
View File

@ -87,10 +87,8 @@ func TestSupervisorLogin(t *testing.T) {
},
requestAuthorization: requestAuthorizationUsingBrowserAuthcodeFlow,
breakRefreshSessionData: func(t *testing.T, pinnipedSession *psession.PinnipedSession, _, _ string) {
customSessionData := pinnipedSession.Custom
require.Equal(t, psession.ProviderTypeOIDC, customSessionData.ProviderType)
require.NotEmpty(t, customSessionData.OIDC.UpstreamRefreshToken)
customSessionData.OIDC.UpstreamRefreshToken = "invalid-updated-refresh-token"
fositeSessionData := pinnipedSession.Fosite
fositeSessionData.Claims.Subject = "wrong-subject"
},
// the ID token Subject should include the upstream user ID after the upstream issuer name
wantDownstreamIDTokenSubjectToMatch: "^" + regexp.QuoteMeta(env.SupervisorUpstreamOIDC.Issuer+"?sub=") + ".+",
@ -124,10 +122,8 @@ func TestSupervisorLogin(t *testing.T) {
},
requestAuthorization: requestAuthorizationUsingBrowserAuthcodeFlow,
breakRefreshSessionData: func(t *testing.T, pinnipedSession *psession.PinnipedSession, _, _ string) {
customSessionData := pinnipedSession.Custom
require.Equal(t, psession.ProviderTypeOIDC, customSessionData.ProviderType)
require.NotEmpty(t, customSessionData.OIDC.UpstreamRefreshToken)
customSessionData.OIDC.UpstreamRefreshToken = "invalid-updated-refresh-token"
fositeSessionData := pinnipedSession.Fosite
fositeSessionData.Claims.Extra["username"] = "some-incorrect-username"
},
wantDownstreamIDTokenSubjectToMatch: "^" + regexp.QuoteMeta(env.SupervisorUpstreamOIDC.Issuer+"?sub=") + ".+",
wantDownstreamIDTokenUsernameToMatch: func(_ string) string { return "^" + regexp.QuoteMeta(env.SupervisorUpstreamOIDC.Username) + "$" },