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Add user search base to downstream subject for upstream LDAP

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- Also add some tests about UTF-8 characters in LDAP attributes
This commit is contained in:
Ryan Richard 2021-05-26 17:04:20 -07:00
parent 18a2a27a06
commit 033e1f0399
9 changed files with 79 additions and 21 deletions
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12
internal/oidc/auth/auth_handler.go
View File

@ -15,6 +15,7 @@ import (
"github.com/ory/fosite/token/jwt"
"github.com/pkg/errors"
"golang.org/x/oauth2"
"k8s.io/apiserver/pkg/authentication/authenticator"
"go.pinniped.dev/internal/httputil/httperr"
"go.pinniped.dev/internal/httputil/securityheader"
@ -108,11 +109,10 @@ func handleAuthRequestForLDAPUpstream(
return nil
}
subject := fmt.Sprintf("%s?%s=%s", ldapUpstream.GetURL(), oidc.IDTokenSubjectClaim, authenticateResponse.User.GetUID())
now := time.Now().UTC()
openIDSession := &openid.DefaultSession{
Claims: &jwt.IDTokenClaims{
Subject: subject,
Subject: downstreamSubjectFromUpstreamLDAP(ldapUpstream, authenticateResponse),
RequestedAt: now,
AuthTime: now,
},
@ -359,3 +359,11 @@ func addCSRFSetCookieHeader(w http.ResponseWriter, csrfValue csrftoken.CSRFToken
return nil
}
func downstreamSubjectFromUpstreamLDAP(ldapUpstream provider.UpstreamLDAPIdentityProviderI, authenticateResponse *authenticator.Response) string {
ldapURL := *ldapUpstream.GetURL()
q := ldapURL.Query()
q.Set(oidc.IDTokenSubjectClaim, authenticateResponse.User.GetUID())
ldapURL.RawQuery = q.Encode()
return ldapURL.String()
}

15
internal/oidc/auth/auth_handler_test.go
View File

@ -44,7 +44,7 @@ func TestAuthorizationEndpoint(t *testing.T) {
downstreamPKCEChallengeMethod = "S256"
happyState = "8b-state"
downstreamClientID = "pinniped-cli"
upstreamLDAPURL = "ldaps://some-ldap-host:123"
upstreamLDAPURL = "ldaps://some-ldap-host:123?base=ou%3Dusers%2Cdc%3Dpinniped%2Cdc%3Ddev"
htmlContentType = "text/html; charset=utf-8"
)
@ -158,9 +158,12 @@ func TestAuthorizationEndpoint(t *testing.T) {
happyLDAPUID := "some-ldap-uid"
happyLDAPGroups := []string{"group1", "group2", "group3"}
parsedUpstreamLDAPURL, err := url.Parse(upstreamLDAPURL)
require.NoError(t, err)
upstreamLDAPIdentityProvider := oidctestutil.TestUpstreamLDAPIdentityProvider{
Name: "some-ldap-idp",
URL: upstreamLDAPURL,
URL: parsedUpstreamLDAPURL,
AuthenticateFunc: func(ctx context.Context, username, password string) (*authenticator.Response, bool, error) {
if username == "" || password == "" {
return nil, false, fmt.Errorf("should not have passed empty username or password to the authenticator")
@ -384,7 +387,7 @@ func TestAuthorizationEndpoint(t *testing.T) {
wantContentType: htmlContentType,
wantRedirectLocationRegexp: happyAuthcodeDownstreamRedirectLocationRegexp,
wantBodyStringWithLocationInHref: false,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "?sub=" + happyLDAPUID,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "&sub=" + happyLDAPUID,
wantDownstreamIDTokenUsername: happyLDAPUsernameFromAuthenticator,
wantDownstreamIDTokenGroups: happyLDAPGroups,
wantDownstreamRequestedScopes: happyDownstreamScopesRequested,
@ -443,7 +446,7 @@ func TestAuthorizationEndpoint(t *testing.T) {
wantContentType: htmlContentType,
wantRedirectLocationRegexp: happyAuthcodeDownstreamRedirectLocationRegexp,
wantBodyStringWithLocationInHref: false,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "?sub=" + happyLDAPUID,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "&sub=" + happyLDAPUID,
wantDownstreamIDTokenUsername: happyLDAPUsernameFromAuthenticator,
wantDownstreamIDTokenGroups: happyLDAPGroups,
wantDownstreamRequestedScopes: happyDownstreamScopesRequested,
@ -525,7 +528,7 @@ func TestAuthorizationEndpoint(t *testing.T) {
wantContentType: htmlContentType,
wantRedirectLocationRegexp: downstreamRedirectURIWithDifferentPort + `\?code=([^&]+)&scope=openid&state=` + happyState,
wantBodyStringWithLocationInHref: false,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "?sub=" + happyLDAPUID,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "&sub=" + happyLDAPUID,
wantDownstreamIDTokenUsername: happyLDAPUsernameFromAuthenticator,
wantDownstreamIDTokenGroups: happyLDAPGroups,
wantDownstreamRequestedScopes: happyDownstreamScopesRequested,
@ -941,7 +944,7 @@ func TestAuthorizationEndpoint(t *testing.T) {
wantContentType: htmlContentType,
wantRedirectLocationRegexp: downstreamRedirectURI + `\?code=([^&]+)&scope=&state=` + happyState, // no scopes granted
wantBodyStringWithLocationInHref: false,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "?sub=" + happyLDAPUID,
wantDownstreamIDTokenSubject: upstreamLDAPURL + "&sub=" + happyLDAPUID,
wantDownstreamIDTokenUsername: happyLDAPUsernameFromAuthenticator,
wantDownstreamIDTokenGroups: happyLDAPGroups,
wantDownstreamRequestedScopes: []string{"email"}, // only email was requested

2
internal/oidc/provider/dynamic_upstream_idp_provider.go
View File

@ -56,7 +56,7 @@ type UpstreamLDAPIdentityProviderI interface {
// Return a URL which uniquely identifies this LDAP provider, e.g. "ldaps://host.example.com:1234".
// This URL is not used for connecting to the provider, but rather is used for creating a globally unique user
// identifier by being combined with the user's UID, since user UIDs are only unique within one provider.
GetURL() string
GetURL() *url.URL
// A method for performing user authentication against the upstream LDAP provider.
authenticators.UserAuthenticator

6
internal/testutil/oidctestutil/oidctestutil.go
View File

@ -51,10 +51,12 @@ type ExchangeAuthcodeAndValidateTokenArgs struct {
type TestUpstreamLDAPIdentityProvider struct {
Name string
URL string
URL *url.URL
AuthenticateFunc func(ctx context.Context, username, password string) (*authenticator.Response, bool, error)
}
var _ provider.UpstreamLDAPIdentityProviderI = &TestUpstreamLDAPIdentityProvider{}
func (u *TestUpstreamLDAPIdentityProvider) GetName() string {
return u.Name
}
@ -63,7 +65,7 @@ func (u *TestUpstreamLDAPIdentityProvider) AuthenticateUser(ctx context.Context,
return u.AuthenticateFunc(ctx, username, password)
}
func (u *TestUpstreamLDAPIdentityProvider) GetURL() string {
func (u *TestUpstreamLDAPIdentityProvider) GetURL() *url.URL {
return u.URL
}

19
internal/upstreamldap/upstreamldap.go
View File

@ -11,17 +11,19 @@ import (
"errors"
"fmt"
"net"
"net/url"
"sort"
"strings"
"time"
"k8s.io/utils/trace"
"github.com/go-ldap/ldap/v3"
"k8s.io/apiserver/pkg/authentication/authenticator"
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/utils/trace"
"go.pinniped.dev/internal/authenticators"
"go.pinniped.dev/internal/endpointaddr"
"go.pinniped.dev/internal/oidc/provider"
"go.pinniped.dev/internal/plog"
)
@ -138,6 +140,9 @@ type Provider struct {
c ProviderConfig
}
var _ provider.UpstreamLDAPIdentityProviderI = &Provider{}
var _ authenticators.UserAuthenticator = &Provider{}
// Create a Provider. The config is not a pointer to ensure that a copy of the config is created,
// making the resulting Provider use an effectively read-only configuration.
func New(config ProviderConfig) *Provider {
@ -249,11 +254,15 @@ func (p *Provider) GetName() string {
return p.c.Name
}
// Return a URL which uniquely identifies this LDAP provider, e.g. "ldaps://host.example.com:1234".
// Return a URL which uniquely identifies this LDAP provider, e.g. "ldaps://host.example.com:1234?base=user-search-base".
// This URL is not used for connecting to the provider, but rather is used for creating a globally unique user
// identifier by being combined with the user's UID, since user UIDs are only unique within one provider.
func (p *Provider) GetURL() string {
return fmt.Sprintf("%s://%s", ldapsScheme, p.c.Host)
func (p *Provider) GetURL() *url.URL {
u := &url.URL{Scheme: ldapsScheme, Host: p.c.Host}
q := u.Query()
q.Set("base", p.c.UserSearch.Base)
u.RawQuery = q.Encode()
return u
}
// TestConnection provides a method for testing the connection and bind settings. It performs a dial and bind

15
internal/upstreamldap/upstreamldap_test.go
View File

@ -1115,8 +1115,19 @@ func TestGetConfig(t *testing.T) {
}
func TestGetURL(t *testing.T) {
require.Equal(t, "ldaps://ldap.example.com:1234", New(ProviderConfig{Host: "ldap.example.com:1234"}).GetURL())
require.Equal(t, "ldaps://ldap.example.com", New(ProviderConfig{Host: "ldap.example.com"}).GetURL())
require.Equal(t,
"ldaps://ldap.example.com:1234?base=ou%3Dusers%2Cdc%3Dpinniped%2Cdc%3Ddev",
New(ProviderConfig{
Host: "ldap.example.com:1234",
UserSearch: UserSearchConfig{Base: "ou=users,dc=pinniped,dc=dev"},
}).GetURL().String())
require.Equal(t,
"ldaps://ldap.example.com?base=ou%3Dusers%2Cdc%3Dpinniped%2Cdc%3Ddev",
New(ProviderConfig{
Host: "ldap.example.com",
UserSearch: UserSearchConfig{Base: "ou=users,dc=pinniped,dc=dev"},
}).GetURL().String())
}
// Testing of host parsing, TLS negotiation, and CA bundle, etc. for the production code's dialer.

2
test/deploy/tools/ldap.yaml
View File

@ -41,7 +41,7 @@ ldap.ldif: |
objectClass: shadowAccount
cn: pinny
sn: Seal
givenName: Pinny
givenName: Pinny the 🦭
mail: pinny.ldap@example.com
userPassword: (@= data.values.pinny_ldap_password @)
uid: pinny

25
test/integration/ldap_client_test.go
View File

@ -167,6 +167,31 @@ func TestLDAPSearch(t *testing.T) {
User: &user.DefaultInfo{Name: "Seal", UID: "1000", Groups: []string{"ball-game-players", "seals"}}, // note that the final answer has case preserved from the entry
},
},
{
name: "when the UsernameAttribute or UIDAttribute are attributes whose value contains UTF-8 data",
username: "pinny",
password: pinnyPassword,
provider: upstreamldap.New(*providerConfig(func(p *upstreamldap.ProviderConfig) {
p.UserSearch.Filter = "cn={}"
p.UserSearch.UsernameAttribute = "givenName"
p.UserSearch.UIDAttribute = "givenName"
})),
wantAuthResponse: &authenticator.Response{
User: &user.DefaultInfo{Name: "Pinny the 🦭", UID: "Pinny the 🦭", Groups: []string{"ball-game-players", "seals"}},
},
},
{
name: "when the search filter is searching on an attribute whose value contains UTF-8 data",
username: "Pinny the 🦭",
password: pinnyPassword,
provider: upstreamldap.New(*providerConfig(func(p *upstreamldap.ProviderConfig) {
p.UserSearch.Filter = "givenName={}"
p.UserSearch.UsernameAttribute = "cn"
})),
wantAuthResponse: &authenticator.Response{
User: &user.DefaultInfo{Name: "pinny", UID: "1000", Groups: []string{"ball-game-players", "seals"}},
},
},
{
name: "when the UsernameAttribute is dn and there is no user search filter provided",
username: "cn=pinny,ou=users,dc=pinniped,dc=dev",

4
test/integration/supervisor_login_test.go
View File

@ -119,7 +119,7 @@ func TestSupervisorLogin(t *testing.T) {
},
// the ID token Subject should be the Host URL plus the value pulled from the requested UserSearch.Attributes.UID attribute
wantDownstreamIDTokenSubjectToMatch: regexp.QuoteMeta(
"ldaps://" + env.SupervisorUpstreamLDAP.Host + "?sub=" + env.SupervisorUpstreamLDAP.TestUserUniqueIDAttributeValue,
"ldaps://" + env.SupervisorUpstreamLDAP.Host + "?base=" + url.QueryEscape(env.SupervisorUpstreamLDAP.UserSearchBase) + "&sub=" + env.SupervisorUpstreamLDAP.TestUserUniqueIDAttributeValue,
),
// the ID token Username should have been pulled from the requested UserSearch.Attributes.Username attribute
wantDownstreamIDTokenUsernameToMatch: regexp.QuoteMeta(env.SupervisorUpstreamLDAP.TestUserMailAttributeValue),
@ -176,7 +176,7 @@ func TestSupervisorLogin(t *testing.T) {
},
// the ID token Subject should be the Host URL plus the value pulled from the requested UserSearch.Attributes.UID attribute
wantDownstreamIDTokenSubjectToMatch: regexp.QuoteMeta(
"ldaps://" + env.SupervisorUpstreamLDAP.StartTLSOnlyHost + "?sub=" + env.SupervisorUpstreamLDAP.TestUserUniqueIDAttributeValue,
"ldaps://" + env.SupervisorUpstreamLDAP.StartTLSOnlyHost + "?base=" + url.QueryEscape(env.SupervisorUpstreamLDAP.UserSearchBase) + "&sub=" + env.SupervisorUpstreamLDAP.TestUserUniqueIDAttributeValue,
),
// the ID token Username should have been pulled from the requested UserSearch.Attributes.Username attribute
wantDownstreamIDTokenUsernameToMatch: regexp.QuoteMeta(env.SupervisorUpstreamLDAP.TestUserDN),