certificates/api/ssh_test.go
2019-11-05 16:41:17 -08:00

374 lines
12 KiB
Go

package api
import (
"bytes"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"reflect"
"testing"
"time"
"github.com/smallstep/assert"
"github.com/smallstep/certificates/authority"
"github.com/smallstep/certificates/authority/provisioner"
"github.com/smallstep/certificates/logging"
"golang.org/x/crypto/ssh"
)
var (
sshSignerKey = mustKey()
sshUserKey = mustKey()
sshHostKey = mustKey()
)
func mustKey() *ecdsa.PrivateKey {
priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
panic(err)
}
return priv
}
func signSSHCertificate(cert *ssh.Certificate) error {
signerKey, err := ssh.NewPublicKey(sshSignerKey.Public())
if err != nil {
return err
}
signer, err := ssh.NewSignerFromSigner(sshSignerKey)
if err != nil {
return err
}
cert.SignatureKey = signerKey
data := cert.Marshal()
data = data[:len(data)-4]
sig, err := signer.Sign(rand.Reader, data)
if err != nil {
return err
}
cert.Signature = sig
return nil
}
func getSignedUserCertificate() (*ssh.Certificate, error) {
key, err := ssh.NewPublicKey(sshUserKey.Public())
if err != nil {
return nil, err
}
t := time.Now()
cert := &ssh.Certificate{
Nonce: []byte("1234567890"),
Key: key,
Serial: 1234567890,
CertType: ssh.UserCert,
KeyId: "user@localhost",
ValidPrincipals: []string{"user"},
ValidAfter: uint64(t.Unix()),
ValidBefore: uint64(t.Add(time.Hour).Unix()),
Permissions: ssh.Permissions{
CriticalOptions: map[string]string{},
Extensions: map[string]string{
"permit-X11-forwarding": "",
"permit-agent-forwarding": "",
"permit-port-forwarding": "",
"permit-pty": "",
"permit-user-rc": "",
},
},
Reserved: []byte{},
}
if err := signSSHCertificate(cert); err != nil {
return nil, err
}
return cert, nil
}
func getSignedHostCertificate() (*ssh.Certificate, error) {
key, err := ssh.NewPublicKey(sshHostKey.Public())
if err != nil {
return nil, err
}
t := time.Now()
cert := &ssh.Certificate{
Nonce: []byte("1234567890"),
Key: key,
Serial: 1234567890,
CertType: ssh.UserCert,
KeyId: "internal.smallstep.com",
ValidPrincipals: []string{"internal.smallstep.com"},
ValidAfter: uint64(t.Unix()),
ValidBefore: uint64(t.Add(time.Hour).Unix()),
Permissions: ssh.Permissions{
CriticalOptions: map[string]string{},
Extensions: map[string]string{},
},
Reserved: []byte{},
}
if err := signSSHCertificate(cert); err != nil {
return nil, err
}
return cert, nil
}
func TestSSHCertificate_MarshalJSON(t *testing.T) {
user, err := getSignedUserCertificate()
assert.FatalError(t, err)
host, err := getSignedHostCertificate()
assert.FatalError(t, err)
userB64 := base64.StdEncoding.EncodeToString(user.Marshal())
hostB64 := base64.StdEncoding.EncodeToString(host.Marshal())
type fields struct {
Certificate *ssh.Certificate
}
tests := []struct {
name string
fields fields
want []byte
wantErr bool
}{
{"nil", fields{Certificate: nil}, []byte("null"), false},
{"user", fields{Certificate: user}, []byte(`"` + userB64 + `"`), false},
{"user", fields{Certificate: host}, []byte(`"` + hostB64 + `"`), false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := SSHCertificate{
Certificate: tt.fields.Certificate,
}
got, err := c.MarshalJSON()
if (err != nil) != tt.wantErr {
t.Errorf("SSHCertificate.MarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("SSHCertificate.MarshalJSON() = %v, want %v", got, tt.want)
}
})
}
}
func TestSSHCertificate_UnmarshalJSON(t *testing.T) {
user, err := getSignedUserCertificate()
assert.FatalError(t, err)
host, err := getSignedHostCertificate()
assert.FatalError(t, err)
userB64 := base64.StdEncoding.EncodeToString(user.Marshal())
hostB64 := base64.StdEncoding.EncodeToString(host.Marshal())
keyB64 := base64.StdEncoding.EncodeToString(user.Key.Marshal())
type args struct {
data []byte
}
tests := []struct {
name string
args args
want *ssh.Certificate
wantErr bool
}{
{"null", args{[]byte(`null`)}, nil, false},
{"empty", args{[]byte(`""`)}, nil, false},
{"user", args{[]byte(`"` + userB64 + `"`)}, user, false},
{"host", args{[]byte(`"` + hostB64 + `"`)}, host, false},
{"bad-string", args{[]byte(userB64)}, nil, true},
{"bad-base64", args{[]byte(`"this-is-not-base64"`)}, nil, true},
{"bad-key", args{[]byte(`"bm90LWEta2V5"`)}, nil, true},
{"bat-cert", args{[]byte(`"` + keyB64 + `"`)}, nil, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := &SSHCertificate{}
if err := c.UnmarshalJSON(tt.args.data); (err != nil) != tt.wantErr {
t.Errorf("SSHCertificate.UnmarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
}
if !reflect.DeepEqual(tt.want, c.Certificate) {
t.Errorf("SSHCertificate.UnmarshalJSON() got = %v, want %v\n", c.Certificate, tt.want)
}
})
}
}
func TestSignSSHRequest_Validate(t *testing.T) {
type fields struct {
PublicKey []byte
OTT string
CertType string
Principals []string
ValidAfter TimeDuration
ValidBefore TimeDuration
AddUserPublicKey []byte
}
tests := []struct {
name string
fields fields
wantErr bool
}{
{"ok-empty", fields{[]byte("Zm9v"), "ott", "", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, false},
{"ok-user", fields{[]byte("Zm9v"), "ott", "user", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, false},
{"ok-host", fields{[]byte("Zm9v"), "ott", "host", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, false},
{"key", fields{nil, "ott", "user", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, true},
{"key", fields{[]byte(""), "ott", "user", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, true},
{"type", fields{[]byte("Zm9v"), "ott", "foo", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, true},
{"ott", fields{[]byte("Zm9v"), "", "user", []string{"user"}, TimeDuration{}, TimeDuration{}, nil}, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &SSHSignRequest{
PublicKey: tt.fields.PublicKey,
OTT: tt.fields.OTT,
CertType: tt.fields.CertType,
Principals: tt.fields.Principals,
ValidAfter: tt.fields.ValidAfter,
ValidBefore: tt.fields.ValidBefore,
AddUserPublicKey: tt.fields.AddUserPublicKey,
}
if err := s.Validate(); (err != nil) != tt.wantErr {
t.Errorf("SignSSHRequest.Validate() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func Test_caHandler_SSHSign(t *testing.T) {
user, err := getSignedUserCertificate()
assert.FatalError(t, err)
host, err := getSignedHostCertificate()
assert.FatalError(t, err)
userB64 := base64.StdEncoding.EncodeToString(user.Marshal())
hostB64 := base64.StdEncoding.EncodeToString(host.Marshal())
userReq, err := json.Marshal(SSHSignRequest{
PublicKey: user.Key.Marshal(),
OTT: "ott",
})
assert.FatalError(t, err)
hostReq, err := json.Marshal(SSHSignRequest{
PublicKey: host.Key.Marshal(),
OTT: "ott",
})
assert.FatalError(t, err)
userAddReq, err := json.Marshal(SSHSignRequest{
PublicKey: user.Key.Marshal(),
OTT: "ott",
AddUserPublicKey: user.Key.Marshal(),
})
assert.FatalError(t, err)
tests := []struct {
name string
req []byte
authErr error
signCert *ssh.Certificate
signErr error
addUserCert *ssh.Certificate
addUserErr error
body []byte
statusCode int
}{
{"ok-user", userReq, nil, user, nil, nil, nil, []byte(fmt.Sprintf(`{"crt":"%s"}`, userB64)), http.StatusCreated},
{"ok-host", hostReq, nil, host, nil, nil, nil, []byte(fmt.Sprintf(`{"crt":"%s"}`, hostB64)), http.StatusCreated},
{"ok-user-add", userAddReq, nil, user, nil, user, nil, []byte(fmt.Sprintf(`{"crt":"%s","addUserCrt":"%s"}`, userB64, userB64)), http.StatusCreated},
{"fail-body", []byte("bad-json"), nil, nil, nil, nil, nil, nil, http.StatusBadRequest},
{"fail-validate", []byte("{}"), nil, nil, nil, nil, nil, nil, http.StatusBadRequest},
{"fail-publicKey", []byte(`{"publicKey":"Zm9v","ott":"ott"}`), nil, nil, nil, nil, nil, nil, http.StatusBadRequest},
{"fail-publicKey", []byte(fmt.Sprintf(`{"publicKey":"%s","ott":"ott","addUserPublicKey":"Zm9v"}`, base64.StdEncoding.EncodeToString(user.Key.Marshal()))), nil, nil, nil, nil, nil, nil, http.StatusBadRequest},
{"fail-authorize", userReq, fmt.Errorf("an-error"), nil, nil, nil, nil, nil, http.StatusUnauthorized},
{"fail-signSSH", userReq, nil, nil, fmt.Errorf("an-error"), nil, nil, nil, http.StatusForbidden},
{"fail-SignSSHAddUser", userAddReq, nil, user, nil, nil, fmt.Errorf("an-error"), nil, http.StatusForbidden},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
h := New(&mockAuthority{
authorizeSign: func(ott string) ([]provisioner.SignOption, error) {
return []provisioner.SignOption{}, tt.authErr
},
signSSH: func(key ssh.PublicKey, opts provisioner.SSHOptions, signOpts ...provisioner.SignOption) (*ssh.Certificate, error) {
return tt.signCert, tt.signErr
},
signSSHAddUser: func(key ssh.PublicKey, cert *ssh.Certificate) (*ssh.Certificate, error) {
return tt.addUserCert, tt.addUserErr
},
}).(*caHandler)
req := httptest.NewRequest("POST", "http://example.com/ssh/sign", bytes.NewReader(tt.req))
w := httptest.NewRecorder()
h.SSHSign(logging.NewResponseLogger(w), req)
res := w.Result()
if res.StatusCode != tt.statusCode {
t.Errorf("caHandler.SignSSH StatusCode = %d, wants %d", res.StatusCode, tt.statusCode)
}
body, err := ioutil.ReadAll(res.Body)
res.Body.Close()
if err != nil {
t.Errorf("caHandler.SignSSH unexpected error = %v", err)
}
if tt.statusCode < http.StatusBadRequest {
if !bytes.Equal(bytes.TrimSpace(body), tt.body) {
t.Errorf("caHandler.SignSSH Body = %s, wants %s", body, tt.body)
}
}
})
}
}
func Test_caHandler_SSHRoots(t *testing.T) {
user, err := ssh.NewPublicKey(sshUserKey.Public())
assert.FatalError(t, err)
userB64 := base64.StdEncoding.EncodeToString(user.Marshal())
host, err := ssh.NewPublicKey(sshHostKey.Public())
assert.FatalError(t, err)
hostB64 := base64.StdEncoding.EncodeToString(host.Marshal())
tests := []struct {
name string
keys *authority.SSHKeys
keysErr error
body []byte
statusCode int
}{
{"ok", &authority.SSHKeys{HostKeys: []ssh.PublicKey{host}, UserKeys: []ssh.PublicKey{user}}, nil, []byte(fmt.Sprintf(`{"userKey":["%s"],"hostKey":["%s"]}`, userB64, hostB64)), http.StatusOK},
{"user", &authority.SSHKeys{UserKeys: []ssh.PublicKey{user}}, nil, []byte(fmt.Sprintf(`{"userKey":["%s"]}`, userB64)), http.StatusOK},
{"host", &authority.SSHKeys{HostKeys: []ssh.PublicKey{host}}, nil, []byte(fmt.Sprintf(`{"hostKey":["%s"]}`, hostB64)), http.StatusOK},
{"empty", &authority.SSHKeys{}, nil, nil, http.StatusNotFound},
{"error", nil, fmt.Errorf("an error"), nil, http.StatusInternalServerError},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
h := New(&mockAuthority{
getSSHRoots: func() (*authority.SSHKeys, error) {
return tt.keys, tt.keysErr
},
}).(*caHandler)
req := httptest.NewRequest("GET", "http://example.com/ssh/keys", http.NoBody)
w := httptest.NewRecorder()
h.SSHRoots(logging.NewResponseLogger(w), req)
res := w.Result()
if res.StatusCode != tt.statusCode {
t.Errorf("caHandler.SSHKeys StatusCode = %d, wants %d", res.StatusCode, tt.statusCode)
}
body, err := ioutil.ReadAll(res.Body)
res.Body.Close()
if err != nil {
t.Errorf("caHandler.SSHKeys unexpected error = %v", err)
}
if tt.statusCode < http.StatusBadRequest {
if !bytes.Equal(bytes.TrimSpace(body), tt.body) {
t.Errorf("caHandler.SSHKeys Body = %s, wants %s", body, tt.body)
}
}
})
}
}