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Add integration test for multiple audience in structured authn

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Signed-off-by: Anish Ramasekar <anish.ramasekar@gmail.com>
This commit is contained in:
Anish Ramasekar 2024-02-14 17:04:21 -08:00
parent d76d7a1e7a
commit 0feb1d5173
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5 changed files with 165 additions and 5 deletions
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2
staging/src/k8s.io/apiserver/pkg/apis/apiserver/v1alpha1/types.go
View File

@ -242,7 +242,7 @@ type Issuer struct {
AudienceMatchPolicy AudienceMatchPolicyType `json:"audienceMatchPolicy,omitempty"`
}
// AudienceMatchPolicyType is a set of valid values for Issuer.AudienceMatchPolicy
// AudienceMatchPolicyType is a set of valid values for issuer.audienceMatchPolicy
type AudienceMatchPolicyType string
// Valid types for AudienceMatchPolicyType

1
staging/src/k8s.io/apiserver/pkg/apis/apiserver/validation/validation.go
View File

@ -219,6 +219,7 @@ func validateClaimValidationRules(compiler authenticationcel.Compiler, celMapper
compilationResult, err := compileClaimsCELExpression(compiler, &authenticationcel.ClaimValidationCondition{
Expression: rule.Expression,
Message: rule.Message,
}, fldPath.Child("expression"))
if err != nil {

6
staging/src/k8s.io/apiserver/plugin/pkg/authenticator/token/oidc/oidc.go
View File

@ -578,10 +578,8 @@ func (v *idTokenVerifier) verifyAudience(t *oidc.IDToken) error {
if v.audiences.Len() == 0 {
return fmt.Errorf("oidc: invalid configuration, audiences cannot be empty")
}
for _, aud := range t.Audience {
if v.audiences.Has(aud) {
return nil
}
if v.audiences.HasAny(t.Audience...) {
return nil
}
return fmt.Errorf("oidc: expected audience in %q got %q", sets.List(v.audiences), t.Audience)

109
staging/src/k8s.io/apiserver/plugin/pkg/authenticator/token/oidc/oidc_test.go
View File

@ -1554,6 +1554,39 @@ func TestToken(t *testing.T) {
Name: "jane",
},
},
{
name: "multiple-audiences in authentication config, multiple matches",
options: Options{
JWTAuthenticator: apiserver.JWTAuthenticator{
Issuer: apiserver.Issuer{
URL: "https://auth.example.com",
Audiences: []string{"random-client", "my-client", "other-client"},
AudienceMatchPolicy: "MatchAny",
},
ClaimMappings: apiserver.ClaimMappings{
Username: apiserver.PrefixedClaimOrExpression{
Claim: "username",
Prefix: pointer.String(""),
},
},
},
now: func() time.Time { return now },
},
signingKey: loadRSAPrivKey(t, "testdata/rsa_1.pem", jose.RS256),
pubKeys: []*jose.JSONWebKey{
loadRSAKey(t, "testdata/rsa_1.pem", jose.RS256),
},
claims: fmt.Sprintf(`{
"iss": "https://auth.example.com",
"aud": ["not-my-client", "my-client", "other-client"],
"azp": "not-my-client",
"username": "jane",
"exp": %d
}`, valid.Unix()),
want: &user.DefaultInfo{
Name: "jane",
},
},
{
name: "multiple-audiences in authentication config, no match",
options: Options{
@ -1585,6 +1618,82 @@ func TestToken(t *testing.T) {
}`, valid.Unix()),
wantErr: `oidc: verify token: oidc: expected audience in ["my-client" "random-client"] got ["not-my-client"]`,
},
{
name: "nuanced audience validation using claim validation rules",
options: Options{
JWTAuthenticator: apiserver.JWTAuthenticator{
Issuer: apiserver.Issuer{
URL: "https://auth.example.com",
Audiences: []string{"bar", "foo", "baz"},
AudienceMatchPolicy: "MatchAny",
},
ClaimMappings: apiserver.ClaimMappings{
Username: apiserver.PrefixedClaimOrExpression{
Claim: "username",
Prefix: pointer.String(""),
},
},
ClaimValidationRules: []apiserver.ClaimValidationRule{
{
Expression: `sets.equivalent(claims.aud, ["bar", "foo", "baz"])`,
Message: "audience must exactly contain [bar, foo, baz]",
},
},
},
now: func() time.Time { return now },
},
signingKey: loadRSAPrivKey(t, "testdata/rsa_1.pem", jose.RS256),
pubKeys: []*jose.JSONWebKey{
loadRSAKey(t, "testdata/rsa_1.pem", jose.RS256),
},
claims: fmt.Sprintf(`{
"iss": "https://auth.example.com",
"aud": ["foo", "bar", "baz"],
"azp": "not-my-client",
"username": "jane",
"exp": %d
}`, valid.Unix()),
want: &user.DefaultInfo{
Name: "jane",
},
},
{
name: "audience validation using claim validation rules fails",
options: Options{
JWTAuthenticator: apiserver.JWTAuthenticator{
Issuer: apiserver.Issuer{
URL: "https://auth.example.com",
Audiences: []string{"bar", "foo", "baz"},
AudienceMatchPolicy: "MatchAny",
},
ClaimMappings: apiserver.ClaimMappings{
Username: apiserver.PrefixedClaimOrExpression{
Claim: "username",
Prefix: pointer.String(""),
},
},
ClaimValidationRules: []apiserver.ClaimValidationRule{
{
Expression: `sets.equivalent(claims.aud, ["bar", "foo", "baz"])`,
Message: "audience must exactly contain [bar, foo, baz]",
},
},
},
now: func() time.Time { return now },
},
signingKey: loadRSAPrivKey(t, "testdata/rsa_1.pem", jose.RS256),
pubKeys: []*jose.JSONWebKey{
loadRSAKey(t, "testdata/rsa_1.pem", jose.RS256),
},
claims: fmt.Sprintf(`{
"iss": "https://auth.example.com",
"aud": ["foo", "baz"],
"azp": "not-my-client",
"username": "jane",
"exp": %d
}`, valid.Unix()),
wantErr: `oidc: error evaluating claim validation expression: validation expression 'sets.equivalent(claims.aud, ["bar", "foo", "baz"])' failed: audience must exactly contain [bar, foo, baz]`,
},
{
name: "invalid-issuer",
options: Options{

52
test/integration/apiserver/oidc/oidc_test.go
View File

@ -761,6 +761,58 @@ jwt:
},
wantUser: nil,
},
{
name: "multiple audiences check with claim validation rule is ok",
authConfigFn: func(t *testing.T, issuerURL, caCert string) string {
return fmt.Sprintf(`
apiVersion: apiserver.config.k8s.io/v1alpha1
kind: AuthenticationConfiguration
jwt:
- issuer:
url: %s
audiences:
- baz
- foo
audienceMatchPolicy: MatchAny
certificateAuthority: |
%s
claimMappings:
username:
expression: "'k8s-' + claims.sub"
uid:
expression: "claims.uid"
claimValidationRules:
- expression: 'sets.equivalent(claims.aud, ["bar", "foo", "baz"])'
message: 'aud claim must be exactly match list ["bar", "foo", "baz"]'
`, issuerURL, indentCertificateAuthority(caCert))
},
configureInfrastructure: configureTestInfrastructure[*rsa.PrivateKey, *rsa.PublicKey],
configureOIDCServerBehaviour: func(t *testing.T, oidcServer *utilsoidc.TestServer, signingPrivateKey *rsa.PrivateKey) {
idTokenLifetime := time.Second * 1200
oidcServer.TokenHandler().EXPECT().Token().Times(1).DoAndReturn(utilsoidc.TokenHandlerBehaviorReturningPredefinedJWT(
t,
signingPrivateKey,
map[string]interface{}{
"iss": oidcServer.URL(),
"sub": defaultOIDCClaimedUsername,
"aud": []string{"foo", "bar", "baz"},
"exp": time.Now().Add(idTokenLifetime).Unix(),
"uid": "1234",
},
defaultStubAccessToken,
defaultStubRefreshToken,
))
},
configureClient: configureClientFetchingOIDCCredentials,
assertErrFn: func(t *testing.T, errorToCheck error) {
assert.NoError(t, errorToCheck)
},
wantUser: &authenticationv1.UserInfo{
Username: "k8s-john_doe",
Groups: []string{"system:authenticated"},
UID: "1234",
},
},
}
for _, tt := range tests {