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ssh_test.go
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package authority
import (
"context"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"encoding/base64"
"fmt"
"net/http"
"reflect"
"testing"
"time"
"github.com/pkg/errors"
"github.com/smallstep/assert"
"github.com/smallstep/certificates/authority/provisioner"
"github.com/smallstep/certificates/db"
"github.com/smallstep/certificates/errs"
"github.com/smallstep/certificates/templates"
"go.step.sm/crypto/jose"
"go.step.sm/crypto/sshutil"
"golang.org/x/crypto/ssh"
)
type sshTestModifier ssh.Certificate
func (m sshTestModifier) Modify(cert *ssh.Certificate, _ provisioner.SignSSHOptions) error {
if m.CertType != 0 {
cert.CertType = m.CertType
}
if m.KeyId != "" {
cert.KeyId = m.KeyId
}
if m.ValidAfter != 0 {
cert.ValidAfter = m.ValidAfter
}
if m.ValidBefore != 0 {
cert.ValidBefore = m.ValidBefore
}
if len(m.ValidPrincipals) != 0 {
cert.ValidPrincipals = m.ValidPrincipals
}
if m.Permissions.CriticalOptions != nil {
cert.Permissions.CriticalOptions = m.Permissions.CriticalOptions
}
if m.Permissions.Extensions != nil {
cert.Permissions.Extensions = m.Permissions.Extensions
}
return nil
}
type sshTestCertModifier string
func (m sshTestCertModifier) Modify(cert *ssh.Certificate, opts provisioner.SignSSHOptions) error {
if m == "" {
return nil
}
return fmt.Errorf(string(m))
}
type sshTestCertValidator string
func (v sshTestCertValidator) Valid(crt *ssh.Certificate, opts provisioner.SignSSHOptions) error {
if v == "" {
return nil
}
return fmt.Errorf(string(v))
}
type sshTestOptionsValidator string
func (v sshTestOptionsValidator) Valid(opts provisioner.SignSSHOptions) error {
if v == "" {
return nil
}
return fmt.Errorf(string(v))
}
type sshTestOptionsModifier string
func (m sshTestOptionsModifier) Modify(cert *ssh.Certificate, opts provisioner.SignSSHOptions) error {
if m == "" {
return nil
}
return fmt.Errorf(string(m))
}
func TestAuthority_initHostOnly(t *testing.T) {
auth := testAuthority(t, func(a *Authority) error {
a.config.SSH.UserKey = ""
return nil
})
// Check keys
keys, err := auth.GetSSHRoots(context.Background())
assert.NoError(t, err)
assert.Len(t, 1, keys.HostKeys)
assert.Len(t, 0, keys.UserKeys)
// Check templates, user templates should work fine.
_, err = auth.GetSSHConfig(context.Background(), "user", nil)
assert.NoError(t, err)
_, err = auth.GetSSHConfig(context.Background(), "host", map[string]string{
"Certificate": "ssh_host_ecdsa_key-cert.pub",
"Key": "ssh_host_ecdsa_key",
})
assert.Error(t, err)
}
func TestAuthority_initUserOnly(t *testing.T) {
auth := testAuthority(t, func(a *Authority) error {
a.config.SSH.HostKey = ""
return nil
})
// Check keys
keys, err := auth.GetSSHRoots(context.Background())
assert.NoError(t, err)
assert.Len(t, 0, keys.HostKeys)
assert.Len(t, 1, keys.UserKeys)
// Check templates, host templates should work fine.
_, err = auth.GetSSHConfig(context.Background(), "host", map[string]string{
"Certificate": "ssh_host_ecdsa_key-cert.pub",
"Key": "ssh_host_ecdsa_key",
})
assert.NoError(t, err)
_, err = auth.GetSSHConfig(context.Background(), "user", nil)
assert.Error(t, err)
}
func TestAuthority_SignSSH(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
pub, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
signKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
signer, err := ssh.NewSignerFromKey(signKey)
assert.FatalError(t, err)
userOptions := sshTestModifier{
CertType: ssh.UserCert,
}
hostOptions := sshTestModifier{
CertType: ssh.HostCert,
}
userTemplate, err := provisioner.TemplateSSHOptions(nil, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", nil))
assert.FatalError(t, err)
hostTemplate, err := provisioner.TemplateSSHOptions(nil, sshutil.CreateTemplateData(sshutil.HostCert, "key-id", nil))
assert.FatalError(t, err)
userTemplateWithUser, err := provisioner.TemplateSSHOptions(nil, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", []string{"user"}))
assert.FatalError(t, err)
hostTemplateWithHosts, err := provisioner.TemplateSSHOptions(nil, sshutil.CreateTemplateData(sshutil.HostCert, "key-id", []string{"foo.test.com", "bar.test.com"}))
assert.FatalError(t, err)
userCustomTemplate, err := provisioner.TemplateSSHOptions(&provisioner.Options{
SSH: &provisioner.SSHOptions{Template: `{
"type": "{{ .Type }}",
"keyId": "{{ .KeyID }}",
"principals": {{ append .Principals "admin" | toJson }},
"extensions": {{ set .Extensions "login@github.com" .Insecure.User.username | toJson }},
"criticalOptions": {{ toJson .CriticalOptions }}
}`},
}, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", []string{"user"}))
assert.FatalError(t, err)
userFailTemplate, err := provisioner.TemplateSSHOptions(&provisioner.Options{
SSH: &provisioner.SSHOptions{Template: `{{ fail "an error"}}`},
}, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", []string{"user"}))
assert.FatalError(t, err)
userJSONSyntaxErrorTemplateFile, err := provisioner.TemplateSSHOptions(&provisioner.Options{
SSH: &provisioner.SSHOptions{TemplateFile: "./testdata/templates/badjsonsyntax.tpl"},
}, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", []string{"user"}))
assert.FatalError(t, err)
userJSONValueErrorTemplateFile, err := provisioner.TemplateSSHOptions(&provisioner.Options{
SSH: &provisioner.SSHOptions{TemplateFile: "./testdata/templates/badjsonvalue.tpl"},
}, sshutil.CreateTemplateData(sshutil.UserCert, "key-id", []string{"user"}))
assert.FatalError(t, err)
now := time.Now()
type fields struct {
sshCAUserCertSignKey ssh.Signer
sshCAHostCertSignKey ssh.Signer
}
type args struct {
key ssh.PublicKey
opts provisioner.SignSSHOptions
signOpts []provisioner.SignOption
}
type want struct {
CertType uint32
Principals []string
ValidAfter uint64
ValidBefore uint64
}
tests := []struct {
name string
fields fields
args args
want want
wantErr bool
}{
{"ok-user", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions}}, want{CertType: ssh.UserCert}, false},
{"ok-host", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{hostTemplate, hostOptions}}, want{CertType: ssh.HostCert}, false},
{"ok-user-only", fields{signer, nil}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions}}, want{CertType: ssh.UserCert}, false},
{"ok-host-only", fields{nil, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{hostTemplate, hostOptions}}, want{CertType: ssh.HostCert}, false},
{"ok-opts-type-user", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "user"}, []provisioner.SignOption{userTemplate}}, want{CertType: ssh.UserCert}, false},
{"ok-opts-type-host", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "host"}, []provisioner.SignOption{hostTemplate}}, want{CertType: ssh.HostCert}, false},
{"ok-opts-principals", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "user", Principals: []string{"user"}}, []provisioner.SignOption{userTemplateWithUser}}, want{CertType: ssh.UserCert, Principals: []string{"user"}}, false},
{"ok-opts-principals", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "host", Principals: []string{"foo.test.com", "bar.test.com"}}, []provisioner.SignOption{hostTemplateWithHosts}}, want{CertType: ssh.HostCert, Principals: []string{"foo.test.com", "bar.test.com"}}, false},
{"ok-opts-valid-after", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "user", ValidAfter: provisioner.NewTimeDuration(now)}, []provisioner.SignOption{userTemplate}}, want{CertType: ssh.UserCert, ValidAfter: uint64(now.Unix())}, false},
{"ok-opts-valid-before", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "host", ValidBefore: provisioner.NewTimeDuration(now)}, []provisioner.SignOption{hostTemplate}}, want{CertType: ssh.HostCert, ValidBefore: uint64(now.Unix())}, false},
{"ok-cert-validator", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestCertValidator("")}}, want{CertType: ssh.UserCert}, false},
{"ok-cert-modifier", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestCertModifier("")}}, want{CertType: ssh.UserCert}, false},
{"ok-opts-validator", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestOptionsValidator("")}}, want{CertType: ssh.UserCert}, false},
{"ok-opts-modifier", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestOptionsModifier("")}}, want{CertType: ssh.UserCert}, false},
{"ok-custom-template", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userCustomTemplate, userOptions}}, want{CertType: ssh.UserCert, Principals: []string{"user", "admin"}}, false},
{"fail-opts-type", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{CertType: "foo"}, []provisioner.SignOption{userTemplate}}, want{}, true},
{"fail-cert-validator", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestCertValidator("an error")}}, want{}, true},
{"fail-cert-modifier", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestCertModifier("an error")}}, want{}, true},
{"fail-opts-validator", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestOptionsValidator("an error")}}, want{}, true},
{"fail-opts-modifier", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, sshTestOptionsModifier("an error")}}, want{}, true},
{"fail-bad-sign-options", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, userOptions, "wrong type"}}, want{}, true},
{"fail-no-user-key", fields{nil, signer}, args{pub, provisioner.SignSSHOptions{CertType: "user"}, []provisioner.SignOption{userTemplate}}, want{}, true},
{"fail-no-host-key", fields{signer, nil}, args{pub, provisioner.SignSSHOptions{CertType: "host"}, []provisioner.SignOption{hostTemplate}}, want{}, true},
{"fail-bad-type", fields{signer, nil}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userTemplate, sshTestModifier{CertType: 100}}}, want{}, true},
{"fail-custom-template", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userFailTemplate, userOptions}}, want{}, true},
{"fail-custom-template-syntax-error-file", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userJSONSyntaxErrorTemplateFile, userOptions}}, want{}, true},
{"fail-custom-template-syntax-value-file", fields{signer, signer}, args{pub, provisioner.SignSSHOptions{}, []provisioner.SignOption{userJSONValueErrorTemplateFile, userOptions}}, want{}, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.sshCAUserCertSignKey = tt.fields.sshCAUserCertSignKey
a.sshCAHostCertSignKey = tt.fields.sshCAHostCertSignKey
got, err := a.SignSSH(context.Background(), tt.args.key, tt.args.opts, tt.args.signOpts...)
if (err != nil) != tt.wantErr {
t.Errorf("Authority.SignSSH() error = %v, wantErr %v", err, tt.wantErr)
return
}
if err == nil && assert.NotNil(t, got) {
assert.Equals(t, tt.want.CertType, got.CertType)
assert.Equals(t, tt.want.Principals, got.ValidPrincipals)
assert.Equals(t, tt.want.ValidAfter, got.ValidAfter)
assert.Equals(t, tt.want.ValidBefore, got.ValidBefore)
assert.NotNil(t, got.Key)
assert.NotNil(t, got.Nonce)
assert.NotEquals(t, 0, got.Serial)
assert.NotNil(t, got.Signature)
assert.NotNil(t, got.SignatureKey)
}
})
}
}
func TestAuthority_SignSSHAddUser(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
pub, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
signKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
signer, err := ssh.NewSignerFromKey(signKey)
assert.FatalError(t, err)
type fields struct {
sshCAUserCertSignKey ssh.Signer
sshCAHostCertSignKey ssh.Signer
addUserPrincipal string
addUserCommand string
}
type args struct {
key ssh.PublicKey
subject *ssh.Certificate
}
type want struct {
CertType uint32
Principals []string
ValidAfter uint64
ValidBefore uint64
ForceCommand string
}
now := time.Now()
validCert := &ssh.Certificate{
CertType: ssh.UserCert,
ValidPrincipals: []string{"user"},
ValidAfter: uint64(now.Unix()),
ValidBefore: uint64(now.Add(time.Hour).Unix()),
}
validWant := want{
CertType: ssh.UserCert,
Principals: []string{"provisioner"},
ValidAfter: uint64(now.Unix()),
ValidBefore: uint64(now.Add(time.Hour).Unix()),
ForceCommand: "sudo useradd -m user; nc -q0 localhost 22",
}
tests := []struct {
name string
fields fields
args args
want want
wantErr bool
}{
{"ok", fields{signer, signer, "", ""}, args{pub, validCert}, validWant, false},
{"ok-no-host-key", fields{signer, nil, "", ""}, args{pub, validCert}, validWant, false},
{"ok-custom-principal", fields{signer, signer, "my-principal", ""}, args{pub, &ssh.Certificate{CertType: ssh.UserCert, ValidPrincipals: []string{"user"}}}, want{CertType: ssh.UserCert, Principals: []string{"my-principal"}, ForceCommand: "sudo useradd -m user; nc -q0 localhost 22"}, false},
{"ok-custom-command", fields{signer, signer, "", "foo <principal> <principal>"}, args{pub, &ssh.Certificate{CertType: ssh.UserCert, ValidPrincipals: []string{"user"}}}, want{CertType: ssh.UserCert, Principals: []string{"provisioner"}, ForceCommand: "foo user user"}, false},
{"ok-custom-principal-and-command", fields{signer, signer, "my-principal", "foo <principal> <principal>"}, args{pub, &ssh.Certificate{CertType: ssh.UserCert, ValidPrincipals: []string{"user"}}}, want{CertType: ssh.UserCert, Principals: []string{"my-principal"}, ForceCommand: "foo user user"}, false},
{"fail-no-user-key", fields{nil, signer, "", ""}, args{pub, validCert}, want{}, true},
{"fail-no-user-cert", fields{signer, signer, "", ""}, args{pub, &ssh.Certificate{CertType: ssh.HostCert, ValidPrincipals: []string{"foo"}}}, want{}, true},
{"fail-no-principals", fields{signer, signer, "", ""}, args{pub, &ssh.Certificate{CertType: ssh.UserCert, ValidPrincipals: []string{}}}, want{}, true},
{"fail-many-principals", fields{signer, signer, "", ""}, args{pub, &ssh.Certificate{CertType: ssh.UserCert, ValidPrincipals: []string{"foo", "bar"}}}, want{}, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.sshCAUserCertSignKey = tt.fields.sshCAUserCertSignKey
a.sshCAHostCertSignKey = tt.fields.sshCAHostCertSignKey
a.config.SSH = &SSHConfig{
AddUserPrincipal: tt.fields.addUserPrincipal,
AddUserCommand: tt.fields.addUserCommand,
}
got, err := a.SignSSHAddUser(context.Background(), tt.args.key, tt.args.subject)
if (err != nil) != tt.wantErr {
t.Errorf("Authority.SignSSHAddUser() error = %v, wantErr %v", err, tt.wantErr)
return
}
if err == nil && assert.NotNil(t, got) {
assert.Equals(t, tt.want.CertType, got.CertType)
assert.Equals(t, tt.want.Principals, got.ValidPrincipals)
assert.Equals(t, tt.args.subject.ValidPrincipals[0]+"-"+tt.want.Principals[0], got.KeyId)
assert.Equals(t, tt.want.ValidAfter, got.ValidAfter)
assert.Equals(t, tt.want.ValidBefore, got.ValidBefore)
assert.Equals(t, map[string]string{"force-command": tt.want.ForceCommand}, got.CriticalOptions)
assert.Equals(t, nil, got.Extensions)
assert.NotNil(t, got.Key)
assert.NotNil(t, got.Nonce)
assert.NotEquals(t, 0, got.Serial)
assert.NotNil(t, got.Signature)
assert.NotNil(t, got.SignatureKey)
}
})
}
}
func TestAuthority_GetSSHRoots(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
user, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
key, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
host, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
type fields struct {
sshCAUserCerts []ssh.PublicKey
sshCAHostCerts []ssh.PublicKey
}
tests := []struct {
name string
fields fields
want *SSHKeys
wantErr bool
}{
{"ok", fields{[]ssh.PublicKey{user}, []ssh.PublicKey{host}}, &SSHKeys{UserKeys: []ssh.PublicKey{user}, HostKeys: []ssh.PublicKey{host}}, false},
{"nil", fields{}, &SSHKeys{}, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.sshCAUserCerts = tt.fields.sshCAUserCerts
a.sshCAHostCerts = tt.fields.sshCAHostCerts
got, err := a.GetSSHRoots(context.Background())
if (err != nil) != tt.wantErr {
t.Errorf("Authority.GetSSHRoots() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Authority.GetSSHRoots() = %v, want %v", got, tt.want)
}
})
}
}
func TestAuthority_GetSSHFederation(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
user, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
key, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
host, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
type fields struct {
sshCAUserFederatedCerts []ssh.PublicKey
sshCAHostFederatedCerts []ssh.PublicKey
}
tests := []struct {
name string
fields fields
want *SSHKeys
wantErr bool
}{
{"ok", fields{[]ssh.PublicKey{user}, []ssh.PublicKey{host}}, &SSHKeys{UserKeys: []ssh.PublicKey{user}, HostKeys: []ssh.PublicKey{host}}, false},
{"nil", fields{}, &SSHKeys{}, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.sshCAUserFederatedCerts = tt.fields.sshCAUserFederatedCerts
a.sshCAHostFederatedCerts = tt.fields.sshCAHostFederatedCerts
got, err := a.GetSSHFederation(context.Background())
if (err != nil) != tt.wantErr {
t.Errorf("Authority.GetSSHFederation() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Authority.GetSSHFederation() = %v, want %v", got, tt.want)
}
})
}
}
func TestAuthority_GetSSHConfig(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
user, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
userSigner, err := ssh.NewSignerFromSigner(key)
assert.FatalError(t, err)
userB64 := base64.StdEncoding.EncodeToString(user.Marshal())
key, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
host, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
hostSigner, err := ssh.NewSignerFromSigner(key)
assert.FatalError(t, err)
hostB64 := base64.StdEncoding.EncodeToString(host.Marshal())
tmplConfig := &templates.Templates{
SSH: &templates.SSHTemplates{
User: []templates.Template{
{Name: "known_host.tpl", Type: templates.File, TemplatePath: "./testdata/templates/known_hosts.tpl", Path: "ssh/known_host", Comment: "#"},
},
Host: []templates.Template{
{Name: "ca.tpl", Type: templates.File, TemplatePath: "./testdata/templates/ca.tpl", Path: "/etc/ssh/ca.pub", Comment: "#"},
},
},
Data: map[string]interface{}{
"Step": &templates.Step{
SSH: templates.StepSSH{
UserKey: user,
HostKey: host,
},
},
},
}
userOutput := []templates.Output{
{Name: "known_host.tpl", Type: templates.File, Comment: "#", Path: "ssh/known_host", Content: []byte(fmt.Sprintf("@cert-authority * %s %s", host.Type(), hostB64))},
}
hostOutput := []templates.Output{
{Name: "ca.tpl", Type: templates.File, Comment: "#", Path: "/etc/ssh/ca.pub", Content: []byte(user.Type() + " " + userB64)},
}
tmplConfigWithUserData := &templates.Templates{
SSH: &templates.SSHTemplates{
User: []templates.Template{
{Name: "include.tpl", Type: templates.File, TemplatePath: "./testdata/templates/include.tpl", Path: "ssh/include", Comment: "#"},
{Name: "config.tpl", Type: templates.File, TemplatePath: "./testdata/templates/config.tpl", Path: "ssh/config", Comment: "#"},
},
Host: []templates.Template{
{
Name: "sshd_config.tpl",
Type: templates.File,
TemplatePath: "./testdata/templates/sshd_config.tpl",
Path: "/etc/ssh/sshd_config",
Comment: "#",
RequiredData: []string{"Certificate", "Key"},
},
},
},
Data: map[string]interface{}{
"Step": &templates.Step{
SSH: templates.StepSSH{
UserKey: user,
HostKey: host,
},
},
},
}
userOutputWithUserData := []templates.Output{
{Name: "include.tpl", Type: templates.File, Comment: "#", Path: "ssh/include", Content: []byte("Host *\n\tInclude /home/user/.step/ssh/config")},
{Name: "config.tpl", Type: templates.File, Comment: "#", Path: "ssh/config", Content: []byte("Match exec \"step ssh check-host %h\"\n\tUserKnownHostsFile /home/user/.step/ssh/known_hosts\n\tProxyCommand step ssh proxycommand %r %h %p\n")},
}
hostOutputWithUserData := []templates.Output{
{Name: "sshd_config.tpl", Type: templates.File, Comment: "#", Path: "/etc/ssh/sshd_config", Content: []byte("Match all\n\tTrustedUserCAKeys /etc/ssh/ca.pub\n\tHostCertificate /etc/ssh/ssh_host_ecdsa_key-cert.pub\n\tHostKey /etc/ssh/ssh_host_ecdsa_key")},
}
tmplConfigUserIncludes := &templates.Templates{
SSH: &templates.SSHTemplates{
User: []templates.Template{
{Name: "step_includes.tpl", Type: templates.PrependLine, TemplatePath: "./testdata/templates/step_includes.tpl", Path: "${STEPPATH}/ssh/includes", Comment: "#"},
},
},
Data: map[string]interface{}{
"Step": &templates.Step{
SSH: templates.StepSSH{
UserKey: user,
HostKey: host,
},
},
},
}
userOutputEmptyData := []templates.Output{
{Name: "step_includes.tpl", Type: templates.File, Comment: "#", Path: "ssh/includes", Content: []byte("Include \"<no value>/ssh/config\"\n")},
}
userOutputWithoutTemplateVersion := []templates.Output{
{Name: "step_includes.tpl", Type: templates.File, Comment: "#", Path: "ssh/includes", Content: []byte("Include \"/home/user/.step/ssh/config\"\n")},
}
userOutputWithTemplateVersion := []templates.Output{
{Name: "step_includes.tpl", Type: templates.PrependLine, Comment: "#", Path: "${STEPPATH}/ssh/includes", Content: []byte("Include \"/home/user/.step/ssh/config\"\n")},
}
tmplConfigErr := &templates.Templates{
SSH: &templates.SSHTemplates{
User: []templates.Template{
{Name: "error.tpl", Type: templates.File, TemplatePath: "./testdata/templates/error.tpl", Path: "ssh/error", Comment: "#"},
},
Host: []templates.Template{
{Name: "error.tpl", Type: templates.File, TemplatePath: "./testdata/templates/error.tpl", Path: "ssh/error", Comment: "#"},
},
},
}
tmplConfigFail := &templates.Templates{
SSH: &templates.SSHTemplates{
User: []templates.Template{
{Name: "fail.tpl", Type: templates.File, TemplatePath: "./testdata/templates/fail.tpl", Path: "ssh/fail", Comment: "#"},
},
},
}
type fields struct {
templates *templates.Templates
userSigner ssh.Signer
hostSigner ssh.Signer
}
type args struct {
typ string
data map[string]string
}
tests := []struct {
name string
fields fields
args args
want []templates.Output
wantErr bool
}{
{"user", fields{tmplConfig, userSigner, hostSigner}, args{"user", nil}, userOutput, false},
{"user", fields{tmplConfig, userSigner, nil}, args{"user", nil}, userOutput, false},
{"host", fields{tmplConfig, userSigner, hostSigner}, args{"host", nil}, hostOutput, false},
{"host", fields{tmplConfig, nil, hostSigner}, args{"host", nil}, hostOutput, false},
{"userWithData", fields{tmplConfigWithUserData, userSigner, hostSigner}, args{"user", map[string]string{"StepPath": "/home/user/.step"}}, userOutputWithUserData, false},
{"hostWithData", fields{tmplConfigWithUserData, userSigner, hostSigner}, args{"host", map[string]string{"Certificate": "ssh_host_ecdsa_key-cert.pub", "Key": "ssh_host_ecdsa_key"}}, hostOutputWithUserData, false},
{"userIncludesEmptyData", fields{tmplConfigUserIncludes, userSigner, hostSigner}, args{"user", nil}, userOutputEmptyData, false},
{"userIncludesWithoutTemplateVersion", fields{tmplConfigUserIncludes, userSigner, hostSigner}, args{"user", map[string]string{"StepPath": "/home/user/.step"}}, userOutputWithoutTemplateVersion, false},
{"userIncludesWithTemplateVersion", fields{tmplConfigUserIncludes, userSigner, hostSigner}, args{"user", map[string]string{"StepPath": "/home/user/.step", "StepSSHTemplateVersion": "v2"}}, userOutputWithTemplateVersion, false},
{"disabled", fields{tmplConfig, nil, nil}, args{"host", nil}, nil, true},
{"badType", fields{tmplConfig, userSigner, hostSigner}, args{"bad", nil}, nil, true},
{"userError", fields{tmplConfigErr, userSigner, hostSigner}, args{"user", nil}, nil, true},
{"hostError", fields{tmplConfigErr, userSigner, hostSigner}, args{"host", map[string]string{"Function": "foo"}}, nil, true},
{"noTemplates", fields{nil, userSigner, hostSigner}, args{"user", nil}, nil, true},
{"missingData", fields{tmplConfigWithUserData, userSigner, hostSigner}, args{"host", map[string]string{"Certificate": "ssh_host_ecdsa_key-cert.pub"}}, nil, true},
{"failError", fields{tmplConfigFail, userSigner, hostSigner}, args{"user", nil}, nil, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.templates = tt.fields.templates
a.sshCAUserCertSignKey = tt.fields.userSigner
a.sshCAHostCertSignKey = tt.fields.hostSigner
got, err := a.GetSSHConfig(context.Background(), tt.args.typ, tt.args.data)
if (err != nil) != tt.wantErr {
t.Errorf("Authority.GetSSHConfig() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Authority.GetSSHConfig() = %v, want %v", got, tt.want)
}
})
}
}
func TestAuthority_CheckSSHHost(t *testing.T) {
type fields struct {
exists bool
err error
}
type args struct {
ctx context.Context
principal string
token string
}
tests := []struct {
name string
fields fields
args args
want bool
wantErr bool
}{
{"true", fields{true, nil}, args{context.Background(), "foo.internal.com", ""}, true, false},
{"false", fields{false, nil}, args{context.Background(), "foo.internal.com", ""}, false, false},
{"notImplemented", fields{false, db.ErrNotImplemented}, args{context.Background(), "foo.internal.com", ""}, false, true},
{"notImplemented", fields{true, db.ErrNotImplemented}, args{context.Background(), "foo.internal.com", ""}, false, true},
{"internal", fields{false, fmt.Errorf("an error")}, args{context.Background(), "foo.internal.com", ""}, false, true},
{"internal", fields{true, fmt.Errorf("an error")}, args{context.Background(), "foo.internal.com", ""}, false, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := testAuthority(t)
a.db = &db.MockAuthDB{
MIsSSHHost: func(_ string) (bool, error) {
return tt.fields.exists, tt.fields.err
},
}
got, err := a.CheckSSHHost(tt.args.ctx, tt.args.principal, tt.args.token)
if (err != nil) != tt.wantErr {
t.Errorf("Authority.CheckSSHHost() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("Authority.CheckSSHHost() = %v, want %v", got, tt.want)
}
})
}
}
func TestSSHConfig_Validate(t *testing.T) {
key, err := jose.GenerateJWK("EC", "P-256", "", "sig", "", 0)
assert.FatalError(t, err)
tests := []struct {
name string
sshConfig *SSHConfig
wantErr bool
}{
{"nil", nil, false},
{"ok", &SSHConfig{Keys: []*SSHPublicKey{{Type: "user", Key: key.Public()}}}, false},
{"ok", &SSHConfig{Keys: []*SSHPublicKey{{Type: "host", Key: key.Public()}}}, false},
{"badType", &SSHConfig{Keys: []*SSHPublicKey{{Type: "bad", Key: key.Public()}}}, true},
{"badKey", &SSHConfig{Keys: []*SSHPublicKey{{Type: "user", Key: *key}}}, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if err := tt.sshConfig.Validate(); (err != nil) != tt.wantErr {
t.Errorf("SSHConfig.Validate() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestAuthority_GetSSHBastion(t *testing.T) {
bastion := &Bastion{
Hostname: "bastion.local",
Port: "2222",
}
type fields struct {
config *Config
sshBastionFunc func(ctx context.Context, user, hostname string) (*Bastion, error)
}
type args struct {
user string
hostname string
}
tests := []struct {
name string
fields fields
args args
want *Bastion
wantErr bool
}{
{"config", fields{&Config{SSH: &SSHConfig{Bastion: bastion}}, nil}, args{"user", "host.local"}, bastion, false},
{"bastion", fields{&Config{SSH: &SSHConfig{Bastion: bastion}}, nil}, args{"user", "bastion.local"}, nil, false},
{"nil", fields{&Config{SSH: &SSHConfig{Bastion: nil}}, nil}, args{"user", "host.local"}, nil, false},
{"empty", fields{&Config{SSH: &SSHConfig{Bastion: &Bastion{}}}, nil}, args{"user", "host.local"}, nil, false},
{"func", fields{&Config{}, func(_ context.Context, _, _ string) (*Bastion, error) { return bastion, nil }}, args{"user", "host.local"}, bastion, false},
{"func err", fields{&Config{}, func(_ context.Context, _, _ string) (*Bastion, error) { return nil, errors.New("foo") }}, args{"user", "host.local"}, nil, true},
{"error", fields{&Config{SSH: nil}, nil}, args{"user", "host.local"}, nil, true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
a := &Authority{
config: tt.fields.config,
sshBastionFunc: tt.fields.sshBastionFunc,
}
got, err := a.GetSSHBastion(context.Background(), tt.args.user, tt.args.hostname)
if (err != nil) != tt.wantErr {
t.Errorf("Authority.GetSSHBastion() error = %v, wantErr %v", err, tt.wantErr)
return
} else if err != nil {
_, ok := err.(errs.StatusCoder)
assert.Fatal(t, ok, "error does not implement StatusCoder interface")
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Authority.GetSSHBastion() = %v, want %v", got, tt.want)
}
})
}
}
func TestAuthority_GetSSHHosts(t *testing.T) {
a := testAuthority(t)
type test struct {
getHostsFunc func(context.Context, *x509.Certificate) ([]Host, error)
auth *Authority
cert *x509.Certificate
cmp func(got []Host)
err error
code int
}
tests := map[string]func(t *testing.T) *test{
"fail/getHostsFunc-fail": func(t *testing.T) *test {
return &test{
getHostsFunc: func(ctx context.Context, cert *x509.Certificate) ([]Host, error) {
return nil, errors.New("force")
},
cert: &x509.Certificate{},
err: errors.New("getSSHHosts: force"),
code: http.StatusInternalServerError,
}
},
"ok/getHostsFunc-defined": func(t *testing.T) *test {
hosts := []Host{
{HostID: "1", Hostname: "foo"},
{HostID: "2", Hostname: "bar"},
}
return &test{
getHostsFunc: func(ctx context.Context, cert *x509.Certificate) ([]Host, error) {
return hosts, nil
},
cert: &x509.Certificate{},
cmp: func(got []Host) {
assert.Equals(t, got, hosts)
},
}
},
"fail/db-get-fail": func(t *testing.T) *test {
return &test{
auth: testAuthority(t, WithDatabase(&db.MockAuthDB{
MGetSSHHostPrincipals: func() ([]string, error) {
return nil, errors.New("force")
},
})),
cert: &x509.Certificate{},
err: errors.New("getSSHHosts: force"),
code: http.StatusInternalServerError,
}
},
"ok": func(t *testing.T) *test {
return &test{
auth: testAuthority(t, WithDatabase(&db.MockAuthDB{
MGetSSHHostPrincipals: func() ([]string, error) {
return []string{"foo", "bar"}, nil
},
})),
cert: &x509.Certificate{},
cmp: func(got []Host) {
assert.Equals(t, got, []Host{
{Hostname: "foo"},
{Hostname: "bar"},
})
},
}
},
}
for name, genTestCase := range tests {
t.Run(name, func(t *testing.T) {
tc := genTestCase(t)
auth := tc.auth
if auth == nil {
auth = a
}
auth.sshGetHostsFunc = tc.getHostsFunc
hosts, err := auth.GetSSHHosts(context.Background(), tc.cert)
if err != nil {
if assert.NotNil(t, tc.err) {
sc, ok := err.(errs.StatusCoder)
assert.Fatal(t, ok, "error does not implement StatusCoder interface")
assert.Equals(t, sc.StatusCode(), tc.code)
assert.HasPrefix(t, err.Error(), tc.err.Error())
}
} else {
if assert.Nil(t, tc.err) {
tc.cmp(hosts)
}
}
})
}
}
func TestAuthority_RekeySSH(t *testing.T) {
key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
pub, err := ssh.NewPublicKey(key.Public())
assert.FatalError(t, err)
signKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
assert.FatalError(t, err)
signer, err := ssh.NewSignerFromKey(signKey)
assert.FatalError(t, err)
userOptions := sshTestModifier{
CertType: ssh.UserCert,
}
now := time.Now().UTC()
a := testAuthority(t)
a.db = &db.MockAuthDB{
MIsSSHRevoked: func(sn string) (bool, error) {
return false, nil
},
}
type test struct {
auth *Authority
userSigner ssh.Signer
hostSigner ssh.Signer
cert *ssh.Certificate
key ssh.PublicKey
signOpts []provisioner.SignOption
cmpResult func(old, n *ssh.Certificate)
err error
code int
}
tests := map[string]func(t *testing.T) *test{
"fail/is-revoked": func(t *testing.T) *test {
auth := testAuthority(t)
auth.db = &db.MockAuthDB{
MIsSSHRevoked: func(sn string) (bool, error) {
return true, nil
},
}
return &test{
auth: auth,
userSigner: signer,
hostSigner: signer,
cert: &ssh.Certificate{
Serial: 1234567890,
ValidAfter: uint64(now.Unix()),
ValidBefore: uint64(now.Add(time.Hour).Unix()),
CertType: ssh.UserCert,
ValidPrincipals: []string{"foo", "bar"},
KeyId: "foo",
},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("authority.authorizeSSHCertificate: certificate has been revoked"),
code: http.StatusUnauthorized,
}
},
"fail/is-revoked-error": func(t *testing.T) *test {
auth := testAuthority(t)
auth.db = &db.MockAuthDB{
MIsSSHRevoked: func(sn string) (bool, error) {
return false, errors.New("an error")
},
}
return &test{
auth: auth,
userSigner: signer,
hostSigner: signer,
cert: &ssh.Certificate{
Serial: 1234567890,
ValidAfter: uint64(now.Unix()),
ValidBefore: uint64(now.Add(time.Hour).Unix()),
CertType: ssh.UserCert,
ValidPrincipals: []string{"foo", "bar"},
KeyId: "foo",
},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("authority.authorizeSSHCertificate: an error"),
code: http.StatusInternalServerError,
}
},
"fail/opts-type": func(t *testing.T) *test {
return &test{
userSigner: signer,
hostSigner: signer,
key: pub,
signOpts: []provisioner.SignOption{userOptions},
err: errors.New("rekeySSH; invalid extra option type"),
code: http.StatusInternalServerError,
}
},
"fail/old-cert-validAfter": func(t *testing.T) *test {
return &test{
userSigner: signer,
hostSigner: signer,
cert: &ssh.Certificate{},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("cannot rekey a certificate without validity period"),
code: http.StatusBadRequest,
}
},
"fail/old-cert-validBefore": func(t *testing.T) *test {
return &test{
userSigner: signer,
hostSigner: signer,
cert: &ssh.Certificate{ValidAfter: uint64(now.Unix())},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("cannot rekey a certificate without validity period"),
code: http.StatusBadRequest,
}
},
"fail/old-cert-no-user-key": func(t *testing.T) *test {
return &test{
userSigner: nil,
hostSigner: signer,
cert: &ssh.Certificate{ValidAfter: uint64(now.Unix()), ValidBefore: uint64(now.Add(10 * time.Minute).Unix()), CertType: ssh.UserCert},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("rekeySSH; user certificate signing is not enabled"),
code: http.StatusNotImplemented,
}
},
"fail/old-cert-no-host-key": func(t *testing.T) *test {
return &test{
userSigner: signer,
hostSigner: nil,
cert: &ssh.Certificate{ValidAfter: uint64(now.Unix()), ValidBefore: uint64(now.Add(10 * time.Minute).Unix()), CertType: ssh.HostCert},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("rekeySSH; host certificate signing is not enabled"),
code: http.StatusNotImplemented,
}
},
"fail/unexpected-old-cert-type": func(t *testing.T) *test {
return &test{
userSigner: signer,
hostSigner: signer,
cert: &ssh.Certificate{ValidAfter: uint64(now.Unix()), ValidBefore: uint64(now.Add(10 * time.Minute).Unix()), CertType: 0},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("unexpected certificate type '0'"),
code: http.StatusBadRequest,
}
},
"fail/db-store": func(t *testing.T) *test {
return &test{
auth: testAuthority(t, WithDatabase(&db.MockAuthDB{
MIsSSHRevoked: func(sn string) (bool, error) {
return false, nil
},
MStoreSSHCertificate: func(cert *ssh.Certificate) error {
return errors.New("force")
},
})),
userSigner: signer,
hostSigner: nil,
cert: &ssh.Certificate{ValidAfter: uint64(now.Unix()), ValidBefore: uint64(now.Add(10 * time.Minute).Unix()), CertType: ssh.UserCert},
key: pub,
signOpts: []provisioner.SignOption{},
err: errors.New("rekeySSH; error storing certificate in db: force"),
code: http.StatusInternalServerError,
}
},
"ok": func(t *testing.T) *test {
va1 := now.Add(-24 * time.Hour)
vb1 := now.Add(-23 * time.Hour)
return &test{
userSigner: signer,
hostSigner: nil,
cert: &ssh.Certificate{
ValidAfter: uint64(va1.Unix()),
ValidBefore: uint64(vb1.Unix()),