Add JWK as an issuer for stepcas.

cas/stepcas/issuer.go

@@ -1,12 +1,36 @@
 package stepcas
 
 import (
+	"net/url"
 	"strings"
+	"time"
 
 	"github.com/pkg/errors"
 	"github.com/smallstep/certificates/cas/apiv1"
 )
 
+type stepIssuer interface {
+	SignToken(subject string, sans []string) (string, error)
+	RevokeToken(subject string) (string, error)
+	Lifetime(d time.Duration) time.Duration
+}
+
+// newStepIssuer returns the configured step issuer.
+func newStepIssuer(caURL *url.URL, iss *apiv1.CertificateIssuer) (stepIssuer, error) {
+	if err := validateCertificateIssuer(iss); err != nil {
+		return nil, err
+	}
+
+	switch strings.ToLower(iss.Type) {
+	case "x5c":
+		return newX5CIssuer(caURL, iss)
+	case "jwk":
+		return newJWKIssuer(caURL, iss)
+	default:
+		return nil, errors.Errorf("stepCAS `certificateIssuer.type` %s is not supported", iss.Type)
+	}
+}
+
 // validateCertificateIssuer validates the configuration of the certificate
 // issuer.
 func validateCertificateIssuer(iss *apiv1.CertificateIssuer) error {
@@ -20,6 +44,8 @@ func validateCertificateIssuer(iss *apiv1.CertificateIssuer) error {
 	switch strings.ToLower(iss.Type) {
 	case "x5c":
 		return validateX5CIssuer(iss)
+	case "jwk":
+		return validateJWKIssuer(iss)
 	default:
 		return errors.Errorf("stepCAS `certificateIssuer.type` %s is not supported", iss.Type)
 	}
@@ -38,3 +64,15 @@ func validateX5CIssuer(iss *apiv1.CertificateIssuer) error {
 		return nil
 	}
 }
+
+// validateJWKIssuer validates the configuration of jwk issuer.
+func validateJWKIssuer(iss *apiv1.CertificateIssuer) error {
+	switch {
+	case iss.Key == "":
+		return errors.New("stepCAS `certificateIssuer.key` cannot be empty")
+	case iss.Provisioner == "":
+		return errors.New("stepCAS `certificateIssuer.provisioner` cannot be empty")
+	default:
+		return nil
+	}
+}

cas/stepcas/issuer_test.go

@@ -0,0 +1,80 @@
+package stepcas
+
+import (
+	"net/url"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/smallstep/certificates/cas/apiv1"
+)
+
+type mockErrIssuer struct{}
+
+func (m mockErrIssuer) SignToken(subject string, sans []string) (string, error) {
+	return "", apiv1.ErrNotImplemented{}
+}
+
+func (m mockErrIssuer) RevokeToken(subject string) (string, error) {
+	return "", apiv1.ErrNotImplemented{}
+}
+
+func (m mockErrIssuer) Lifetime(d time.Duration) time.Duration {
+	return d
+}
+
+func Test_newStepIssuer(t *testing.T) {
+	caURL, err := url.Parse("https://ca.smallstep.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type args struct {
+		caURL *url.URL
+		iss   *apiv1.CertificateIssuer
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    stepIssuer
+		wantErr bool
+	}{
+		{"x5c", args{caURL, &apiv1.CertificateIssuer{
+			Type:        "x5c",
+			Provisioner: "X5C",
+			Certificate: testX5CPath,
+			Key:         testX5CKeyPath,
+		}}, &x5cIssuer{
+			caURL:    caURL,
+			certFile: testX5CPath,
+			keyFile:  testX5CKeyPath,
+			issuer:   "X5C",
+		}, false},
+		{"jwk", args{caURL, &apiv1.CertificateIssuer{
+			Type:        "jwk",
+			Provisioner: "ra@doe.org",
+			Key:         testX5CKeyPath,
+		}}, &jwkIssuer{
+			caURL:   caURL,
+			keyFile: testX5CKeyPath,
+			issuer:  "ra@doe.org",
+		}, false},
+		{"fail", args{caURL, &apiv1.CertificateIssuer{
+			Type:        "unknown",
+			Provisioner: "ra@doe.org",
+			Key:         testX5CKeyPath,
+		}}, nil, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := newStepIssuer(tt.args.caURL, tt.args.iss)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("newStepIssuer() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("newStepIssuer() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

cas/stepcas/jwk_issuer.go

@@ -0,0 +1,96 @@
+package stepcas
+
+import (
+	"crypto"
+	"net/url"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/smallstep/certificates/cas/apiv1"
+	"go.step.sm/crypto/jose"
+	"go.step.sm/crypto/pemutil"
+	"go.step.sm/crypto/randutil"
+)
+
+type jwkIssuer struct {
+	caURL   *url.URL
+	keyFile string
+	issuer  string
+}
+
+func newJWKIssuer(caURL *url.URL, cfg *apiv1.CertificateIssuer) (*jwkIssuer, error) {
+	_, err := newJWKSigner(cfg.Key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &jwkIssuer{
+		caURL:   caURL,
+		keyFile: cfg.Key,
+		issuer:  cfg.Provisioner,
+	}, nil
+}
+
+func (i *jwkIssuer) SignToken(subject string, sans []string) (string, error) {
+	aud := i.caURL.ResolveReference(&url.URL{
+		Path: "/1.0/sign",
+	}).String()
+	return i.createToken(aud, subject, sans)
+}
+
+func (i *jwkIssuer) RevokeToken(subject string) (string, error) {
+	aud := i.caURL.ResolveReference(&url.URL{
+		Path: "/1.0/revoke",
+	}).String()
+	return i.createToken(aud, subject, nil)
+}
+
+func (i *jwkIssuer) Lifetime(d time.Duration) time.Duration {
+	return d
+}
+
+func (i *jwkIssuer) createToken(aud, sub string, sans []string) (string, error) {
+	signer, err := newJWKSigner(i.keyFile)
+	if err != nil {
+		return "", err
+	}
+
+	id, err := randutil.Hex(64) // 256 bits
+	if err != nil {
+		return "", err
+	}
+
+	claims := defaultClaims(i.issuer, sub, aud, id)
+	builder := jose.Signed(signer).Claims(claims)
+	if len(sans) > 0 {
+		builder = builder.Claims(map[string]interface{}{
+			"sans": sans,
+		})
+	}
+
+	tok, err := builder.CompactSerialize()
+	if err != nil {
+		return "", errors.Wrap(err, "error signing token")
+	}
+
+	return tok, nil
+}
+
+func newJWKSigner(keyFile string) (jose.Signer, error) {
+	key, err := pemutil.Read(keyFile)
+	if err != nil {
+		return nil, err
+	}
+	signer, ok := key.(crypto.Signer)
+	if !ok {
+		return nil, errors.New("key is not a crypto.Signer")
+	}
+	kid, err := jose.Thumbprint(&jose.JSONWebKey{Key: signer.Public()})
+	if err != nil {
+		return nil, err
+	}
+	so := new(jose.SignerOptions)
+	so.WithType("JWT")
+	so.WithHeader("kid", kid)
+	return newJoseSigner(signer, so)
+}

cas/stepcas/jwk_issuer_test.go

@@ -0,0 +1,172 @@
+package stepcas
+
+import (
+	"net/url"
+	"reflect"
+	"testing"
+	"time"
+
+	"go.step.sm/crypto/jose"
+)
+
+func Test_jwkIssuer_SignToken(t *testing.T) {
+	caURL, err := url.Parse("https://ca.smallstep.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type fields struct {
+		caURL   *url.URL
+		keyFile string
+		issuer  string
+	}
+	type args struct {
+		subject string
+		sans    []string
+	}
+	type claims struct {
+		Aud  []string `json:"aud"`
+		Sub  string   `json:"sub"`
+		Sans []string `json:"sans"`
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		args    args
+		wantErr bool
+	}{
+		{"ok", fields{caURL, testX5CKeyPath, "ra@doe.org"}, args{"doe", []string{"doe.org"}}, false},
+		{"fail key", fields{caURL, "", "ra@doe.org"}, args{"doe", []string{"doe.org"}}, true},
+		{"fail no signer", fields{caURL, testIssPath, "ra@doe.org"}, args{"doe", []string{"doe.org"}}, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			i := &jwkIssuer{
+				caURL:   tt.fields.caURL,
+				keyFile: tt.fields.keyFile,
+				issuer:  tt.fields.issuer,
+			}
+			got, err := i.SignToken(tt.args.subject, tt.args.sans)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("jwkIssuer.SignToken() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !tt.wantErr {
+				jwt, err := jose.ParseSigned(got)
+				if err != nil {
+					t.Errorf("jose.ParseSigned() error = %v", err)
+				}
+				var c claims
+				want := claims{
+					Aud:  []string{tt.fields.caURL.String() + "/1.0/sign"},
+					Sub:  tt.args.subject,
+					Sans: tt.args.sans,
+				}
+				if err := jwt.Claims(testX5CKey.Public(), &c); err != nil {
+					t.Errorf("jwt.Claims() error = %v", err)
+				}
+				if !reflect.DeepEqual(c, want) {
+					t.Errorf("jwt.Claims() claims = %#v, want %#v", c, want)
+				}
+			}
+		})
+	}
+}
+
+func Test_jwkIssuer_RevokeToken(t *testing.T) {
+	caURL, err := url.Parse("https://ca.smallstep.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type fields struct {
+		caURL   *url.URL
+		keyFile string
+		issuer  string
+	}
+	type args struct {
+		subject string
+	}
+	type claims struct {
+		Aud  []string `json:"aud"`
+		Sub  string   `json:"sub"`
+		Sans []string `json:"sans"`
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		args    args
+		wantErr bool
+	}{
+		{"ok", fields{caURL, testX5CKeyPath, "ra@smallstep.com"}, args{"doe"}, false},
+		{"fail key", fields{caURL, "", "ra@smallstep.com"}, args{"doe"}, true},
+		{"fail no signer", fields{caURL, testIssPath, "ra@smallstep.com"}, args{"doe"}, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			i := &jwkIssuer{
+				caURL:   tt.fields.caURL,
+				keyFile: tt.fields.keyFile,
+				issuer:  tt.fields.issuer,
+			}
+			got, err := i.RevokeToken(tt.args.subject)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("jwkIssuer.RevokeToken() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !tt.wantErr {
+				jwt, err := jose.ParseSigned(got)
+				if err != nil {
+					t.Errorf("jose.ParseSigned() error = %v", err)
+				}
+				var c claims
+				want := claims{
+					Aud: []string{tt.fields.caURL.String() + "/1.0/revoke"},
+					Sub: tt.args.subject,
+				}
+				if err := jwt.Claims(testX5CKey.Public(), &c); err != nil {
+					t.Errorf("jwt.Claims() error = %v", err)
+				}
+				if !reflect.DeepEqual(c, want) {
+					t.Errorf("jwt.Claims() claims = %#v, want %#v", c, want)
+				}
+			}
+		})
+	}
+}
+
+func Test_jwkIssuer_Lifetime(t *testing.T) {
+	caURL, err := url.Parse("https://ca.smallstep.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	type fields struct {
+		caURL   *url.URL
+		keyFile string
+		issuer  string
+	}
+	type args struct {
+		d time.Duration
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		args   args
+		want   time.Duration
+	}{
+		{"ok", fields{caURL, testX5CKeyPath, "ra@smallstep.com"}, args{time.Second}, time.Second},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			i := &jwkIssuer{
+				caURL:   tt.fields.caURL,
+				keyFile: tt.fields.keyFile,
+				issuer:  tt.fields.issuer,
+			}
+			if got := i.Lifetime(tt.args.d); got != tt.want {
+				t.Errorf("jwkIssuer.Lifetime() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

cas/stepcas/stepcas.go

@@ -21,7 +21,7 @@ func init() {
 // StepCAS implements the cas.CertificateAuthorityService interface using
 // another step-ca instance.
 type StepCAS struct {
-	x5c         *x5cIssuer
+	iss         stepIssuer
 	client      *ca.Client
 	fingerprint string
 }
@@ -40,24 +40,21 @@ func New(ctx context.Context, opts apiv1.Options) (*StepCAS, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "stepCAS `certificateAuthority` is not valid")
 	}
-	if err := validateCertificateIssuer(opts.CertificateIssuer); err != nil {
-		return nil, err
-	}
 
-	// Create client.
-	client, err := ca.NewClient(opts.CertificateAuthority, ca.WithRootSHA256(opts.CertificateAuthorityFingerprint))
+	// Create configured issuer
+	iss, err := newStepIssuer(caURL, opts.CertificateIssuer)
 	if err != nil {
 		return nil, err
 	}
 
-	// X5C is the only one supported at the moment.
-	x5c, err := newX5CIssuer(caURL, opts.CertificateIssuer)
+	// Create client.
+	client, err := ca.NewClient(opts.CertificateAuthority, ca.WithRootSHA256(opts.CertificateAuthorityFingerprint))
 	if err != nil {
 		return nil, err
 	}
 
 	return &StepCAS{
-		x5c:         x5c,
+		iss:         iss,
 		client:      client,
 		fingerprint: opts.CertificateAuthorityFingerprint,
 	}, nil
@@ -101,7 +98,7 @@ func (s *StepCAS) RevokeCertificate(req *apiv1.RevokeCertificateRequest) (*apiv1
 		serialNumber = req.Certificate.SerialNumber.String()
 	}
 
-	token, err := s.revokeToken(serialNumber)
+	token, err := s.iss.RevokeToken(serialNumber)
 	if err != nil {
 		return nil, err
 	}
@@ -151,7 +148,7 @@ func (s *StepCAS) createCertificate(cr *x509.CertificateRequest, lifetime time.D
 		commonName = sans[0]
 	}
 
-	token, err := s.signToken(commonName, sans)
+	token, err := s.iss.SignToken(commonName, sans)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -174,27 +171,8 @@ func (s *StepCAS) createCertificate(cr *x509.CertificateRequest, lifetime time.D
 	return cert, chain, nil
 }
 
-func (s *StepCAS) signToken(subject string, sans []string) (string, error) {
-	if s.x5c != nil {
-		return s.x5c.SignToken(subject, sans)
-	}
-
-	return "", errors.New("stepCAS does not have any provisioner configured")
-}
-
-func (s *StepCAS) revokeToken(subject string) (string, error) {
-	if s.x5c != nil {
-		return s.x5c.RevokeToken(subject)
-	}
-
-	return "", errors.New("stepCAS does not have any provisioner configured")
-}
-
 func (s *StepCAS) lifetime(d time.Duration) api.TimeDuration {
-	if s.x5c != nil {
-		d = s.x5c.Lifetime(d)
-	}
 	var td api.TimeDuration
-	td.SetDuration(d)
+	td.SetDuration(s.iss.Lifetime(d))
 	return td
 }

cas/stepcas/stepcas_test.go

@@ -167,6 +167,33 @@ func testCAHelper(t *testing.T) (*url.URL, *ca.Client) {
 	return u, client
 }
 
+func testX5CIssuer(t *testing.T, caURL *url.URL) *x5cIssuer {
+	t.Helper()
+	x5c, err := newX5CIssuer(caURL, &apiv1.CertificateIssuer{
+		Type:        "x5c",
+		Provisioner: "X5C",
+		Certificate: testX5CPath,
+		Key:         testX5CKeyPath,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return x5c
+}
+
+func testJWKIssuer(t *testing.T, caURL *url.URL) *jwkIssuer {
+	t.Helper()
+	x5c, err := newJWKIssuer(caURL, &apiv1.CertificateIssuer{
+		Type:        "jwk",
+		Provisioner: "ra@doe.org",
+		Key:         testX5CKeyPath,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	return x5c
+}
+
 func TestMain(m *testing.M) {
 	testRootCrt, testRootKey = mustSignCertificate("Test Root Certificate", nil, x509util.DefaultRootTemplate, nil, nil)
 	testIssCrt, testIssKey = mustSignCertificate("Test Intermediate Certificate", nil, x509util.DefaultIntermediateTemplate, testRootCrt, testRootKey)
@@ -258,7 +285,7 @@ func TestNew(t *testing.T) {
 				Key:         testX5CKeyPath,
 			},
 		}}, &StepCAS{
-			x5c: &x5cIssuer{
+			iss: &x5cIssuer{
 				caURL:    caURL,
 				certFile: testX5CPath,
 				keyFile:  testX5CKeyPath,
@@ -267,6 +294,23 @@ func TestNew(t *testing.T) {
 			client:      client,
 			fingerprint: testRootFingerprint,
 		}, false},
+		{"ok jwk", args{context.TODO(), apiv1.Options{
+			CertificateAuthority:            caURL.String(),
+			CertificateAuthorityFingerprint: testRootFingerprint,
+			CertificateIssuer: &apiv1.CertificateIssuer{
+				Type:        "jwk",
+				Provisioner: "ra@doe.org",
+				Key:         testX5CKeyPath,
+			},
+		}}, &StepCAS{
+			iss: &jwkIssuer{
+				caURL:   caURL,
+				keyFile: testX5CKeyPath,
+				issuer:  "ra@doe.org",
+			},
+			client:      client,
+			fingerprint: testRootFingerprint,
+		}, false},
 		{"fail authority", args{context.TODO(), apiv1.Options{
 			CertificateAuthority:            "",
 			CertificateAuthorityFingerprint: testRootFingerprint,
@@ -307,6 +351,15 @@ func TestNew(t *testing.T) {
 				Key:         testX5CKeyPath,
 			},
 		}}, nil, true},
+		{"fail provisioner jwk", args{context.TODO(), apiv1.Options{
+			CertificateAuthority:            caURL.String(),
+			CertificateAuthorityFingerprint: testRootFingerprint,
+			CertificateIssuer: &apiv1.CertificateIssuer{
+				Type:        "jwk",
+				Provisioner: "",
+				Key:         testX5CKeyPath,
+			},
+		}}, nil, true},
 		{"fail certificate", args{context.TODO(), apiv1.Options{
 			CertificateAuthority:            caURL.String(),
 			CertificateAuthorityFingerprint: testRootFingerprint,
@@ -327,6 +380,15 @@ func TestNew(t *testing.T) {
 				Key:         "",
 			},
 		}}, nil, true},
+		{"fail key jwk", args{context.TODO(), apiv1.Options{
+			CertificateAuthority:            caURL.String(),
+			CertificateAuthorityFingerprint: testRootFingerprint,
+			CertificateIssuer: &apiv1.CertificateIssuer{
+				Type:        "jwk",
+				Provisioner: "ra@smallstep.com",
+				Key:         "",
+			},
+		}}, nil, true},
 		{"bad authority", args{context.TODO(), apiv1.Options{
 			CertificateAuthority:            "https://foobar",
 			CertificateAuthorityFingerprint: testRootFingerprint,
@@ -367,6 +429,15 @@ func TestNew(t *testing.T) {
 				Key:         testX5CKeyPath,
 			},
 		}}, nil, true},
+		{"fail new jwk issuer", args{context.TODO(), apiv1.Options{
+			CertificateAuthority:            caURL.String(),
+			CertificateAuthorityFingerprint: testRootFingerprint,
+			CertificateIssuer: &apiv1.CertificateIssuer{
+				Type:        "jwk",
+				Provisioner: "ra@doe.org",
+				Key:         testX5CKeyPath + ".missing",
+			},
+		}}, nil, true},
 		{"bad issuer", args{context.TODO(), apiv1.Options{
 			CertificateAuthority:            caURL.String(),
 			CertificateAuthorityFingerprint: testRootFingerprint,
@@ -402,18 +473,11 @@ func TestNew(t *testing.T) {
 
 func TestStepCAS_CreateCertificate(t *testing.T) {
 	caURL, client := testCAHelper(t)
-	x5c, err := newX5CIssuer(caURL, &apiv1.CertificateIssuer{
-		Type:        "x5c",
-		Provisioner: "X5C",
-		Certificate: testX5CPath,
-		Key:         testX5CKeyPath,
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
+	x5c := testX5CIssuer(t, caURL)
+	jwk := testJWKIssuer(t, caURL)
 
 	type fields struct {
-		x5c         *x5cIssuer
+		iss         stepIssuer
 		client      *ca.Client
 		fingerprint string
 	}
@@ -434,6 +498,13 @@ func TestStepCAS_CreateCertificate(t *testing.T) {
 			Certificate:      testCrt,
 			CertificateChain: []*x509.Certificate{testIssCrt},
 		}, false},
+		{"ok jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.CreateCertificateRequest{
+			CSR:      testCR,
+			Lifetime: time.Hour,
+		}}, &apiv1.CreateCertificateResponse{
+			Certificate:      testCrt,
+			CertificateChain: []*x509.Certificate{testIssCrt},
+		}, false},
 		{"fail CSR", fields{x5c, client, testRootFingerprint}, args{&apiv1.CreateCertificateRequest{
 			CSR:      nil,
 			Lifetime: time.Hour,
@@ -442,7 +513,7 @@ func TestStepCAS_CreateCertificate(t *testing.T) {
 			CSR:      testCR,
 			Lifetime: 0,
 		}}, nil, true},
-		{"fail sign token", fields{nil, client, testRootFingerprint}, args{&apiv1.CreateCertificateRequest{
+		{"fail sign token", fields{mockErrIssuer{}, client, testRootFingerprint}, args{&apiv1.CreateCertificateRequest{
 			CSR:      testCR,
 			Lifetime: time.Hour,
 		}}, nil, true},
@@ -454,7 +525,7 @@ func TestStepCAS_CreateCertificate(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &StepCAS{
-				x5c:         tt.fields.x5c,
+				iss:         tt.fields.iss,
 				client:      tt.fields.client,
 				fingerprint: tt.fields.fingerprint,
 			}
@@ -472,18 +543,11 @@ func TestStepCAS_CreateCertificate(t *testing.T) {
 
 func TestStepCAS_RenewCertificate(t *testing.T) {
 	caURL, client := testCAHelper(t)
-	x5c, err := newX5CIssuer(caURL, &apiv1.CertificateIssuer{
-		Type:        "x5c",
-		Provisioner: "X5C",
-		Certificate: testX5CPath,
-		Key:         testX5CKeyPath,
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
+	x5c := testX5CIssuer(t, caURL)
+	jwk := testJWKIssuer(t, caURL)
 
 	type fields struct {
-		x5c         *x5cIssuer
+		iss         stepIssuer
 		client      *ca.Client
 		fingerprint string
 	}
@@ -501,11 +565,15 @@ func TestStepCAS_RenewCertificate(t *testing.T) {
 			CSR:      testCR,
 			Lifetime: time.Hour,
 		}}, nil, true},
+		{"not implemented jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.RenewCertificateRequest{
+			CSR:      testCR,
+			Lifetime: time.Hour,
+		}}, nil, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &StepCAS{
-				x5c:         tt.fields.x5c,
+				iss:         tt.fields.iss,
 				client:      tt.fields.client,
 				fingerprint: tt.fields.fingerprint,
 			}
@@ -523,18 +591,11 @@ func TestStepCAS_RenewCertificate(t *testing.T) {
 
 func TestStepCAS_RevokeCertificate(t *testing.T) {
 	caURL, client := testCAHelper(t)
-	x5c, err := newX5CIssuer(caURL, &apiv1.CertificateIssuer{
-		Type:        "x5c",
-		Provisioner: "X5C",
-		Certificate: testX5CPath,
-		Key:         testX5CKeyPath,
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
+	x5c := testX5CIssuer(t, caURL)
+	jwk := testJWKIssuer(t, caURL)
 
 	type fields struct {
-		x5c         *x5cIssuer
+		iss         stepIssuer
 		client      *ca.Client
 		fingerprint string
 	}
@@ -564,11 +625,27 @@ func TestStepCAS_RevokeCertificate(t *testing.T) {
 		}}, &apiv1.RevokeCertificateResponse{
 			Certificate: testCrt,
 		}, false},
+		{"ok serial number jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
+			SerialNumber: "ok",
+			Certificate:  nil,
+		}}, &apiv1.RevokeCertificateResponse{}, false},
+		{"ok certificate jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
+			SerialNumber: "",
+			Certificate:  testCrt,
+		}}, &apiv1.RevokeCertificateResponse{
+			Certificate: testCrt,
+		}, false},
+		{"ok both jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
+			SerialNumber: "ok",
+			Certificate:  testCrt,
+		}}, &apiv1.RevokeCertificateResponse{
+			Certificate: testCrt,
+		}, false},
 		{"fail request", fields{x5c, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
 			SerialNumber: "",
 			Certificate:  nil,
 		}}, nil, true},
-		{"fail revoke token", fields{nil, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
+		{"fail revoke token", fields{mockErrIssuer{}, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
 			SerialNumber: "ok",
 		}}, nil, true},
 		{"fail client revoke", fields{x5c, client, testRootFingerprint}, args{&apiv1.RevokeCertificateRequest{
@@ -578,7 +655,7 @@ func TestStepCAS_RevokeCertificate(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &StepCAS{
-				x5c:         tt.fields.x5c,
+				iss:         tt.fields.iss,
 				client:      tt.fields.client,
 				fingerprint: tt.fields.fingerprint,
 			}
@@ -596,18 +673,11 @@ func TestStepCAS_RevokeCertificate(t *testing.T) {
 
 func TestStepCAS_GetCertificateAuthority(t *testing.T) {
 	caURL, client := testCAHelper(t)
-	x5c, err := newX5CIssuer(caURL, &apiv1.CertificateIssuer{
-		Type:        "x5c",
-		Provisioner: "X5C",
-		Certificate: testX5CPath,
-		Key:         testX5CKeyPath,
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
+	x5c := testX5CIssuer(t, caURL)
+	jwk := testJWKIssuer(t, caURL)
 
 	type fields struct {
-		x5c         *x5cIssuer
+		iss         stepIssuer
 		client      *ca.Client
 		fingerprint string
 	}
@@ -626,6 +696,11 @@ func TestStepCAS_GetCertificateAuthority(t *testing.T) {
 		}}, &apiv1.GetCertificateAuthorityResponse{
 			RootCertificate: testRootCrt,
 		}, false},
+		{"ok jwk", fields{jwk, client, testRootFingerprint}, args{&apiv1.GetCertificateAuthorityRequest{
+			Name: caURL.String(),
+		}}, &apiv1.GetCertificateAuthorityResponse{
+			RootCertificate: testRootCrt,
+		}, false},
 		{"fail fingerprint", fields{x5c, client, "fail"}, args{&apiv1.GetCertificateAuthorityRequest{
 			Name: caURL.String(),
 		}}, nil, true},
@@ -633,7 +708,7 @@ func TestStepCAS_GetCertificateAuthority(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &StepCAS{
-				x5c:         tt.fields.x5c,
+				iss:         tt.fields.iss,
 				client:      tt.fields.client,
 				fingerprint: tt.fields.fingerprint,
 			}