package provisioner import ( "context" "crypto" "crypto/rand" "encoding/base64" "errors" "fmt" "net/http" "testing" "time" "golang.org/x/crypto/ssh" "go.step.sm/crypto/jose" "go.step.sm/crypto/pemutil" "github.com/smallstep/assert" "github.com/smallstep/certificates/api/render" ) func TestSSHPOP_Getters(t *testing.T) { p, err := generateSSHPOP() assert.FatalError(t, err) id := "sshpop/" + p.Name if got := p.GetID(); got != id { t.Errorf("SSHPOP.GetID() = %v, want %v", got, id) } if got := p.GetName(); got != p.Name { t.Errorf("SSHPOP.GetName() = %v, want %v", got, p.Name) } if got := p.GetType(); got != TypeSSHPOP { t.Errorf("SSHPOP.GetType() = %v, want %v", got, TypeSSHPOP) } kid, key, ok := p.GetEncryptedKey() if kid != "" || key != "" || ok == true { t.Errorf("SSHPOP.GetEncryptedKey() = (%v, %v, %v), want (%v, %v, %v)", kid, key, ok, "", "", false) } } func createSSHCert(cert *ssh.Certificate, signer ssh.Signer) (*ssh.Certificate, *jose.JSONWebKey, error) { now := time.Now() jwk, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "foo", 0) if err != nil { return nil, nil, err } cert.Key, err = ssh.NewPublicKey(jwk.Public().Key) if err != nil { return nil, nil, err } if cert.ValidAfter == 0 { cert.ValidAfter = uint64(now.Unix()) } if cert.ValidBefore == 0 { cert.ValidBefore = uint64(now.Add(time.Hour).Unix()) } if err := cert.SignCert(rand.Reader, signer); err != nil { return nil, nil, err } return cert, jwk, nil } func generateSSHPOPToken(p Interface, cert *ssh.Certificate, jwk *jose.JSONWebKey) (string, error) { return generateToken("foo", p.GetName(), testAudiences.Sign[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) } func TestSSHPOP_authorizeToken(t *testing.T) { key, err := pemutil.Read("./testdata/secrets/ssh_user_ca_key") assert.FatalError(t, err) signer, ok := key.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh signing key to crypto signer") sshSigner, err := ssh.NewSignerFromSigner(signer) assert.FatalError(t, err) type test struct { p *SSHPOP token string err error code int } tests := map[string]func(*testing.T) test{ "fail/bad-token": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) return test{ p: p, token: "foo", code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; error extracting sshpop header from token: extractSSHPOPCert; error parsing token: "), } }, "fail/cert-not-yet-valid": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{ CertType: ssh.UserCert, ValidAfter: uint64(time.Now().Add(time.Minute).Unix()), }, sshSigner) assert.FatalError(t, err) tok, err := generateSSHPOPToken(p, cert, jwk) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; sshpop certificate validAfter is in the future"), } }, "fail/cert-past-validity": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{ CertType: ssh.UserCert, ValidBefore: uint64(time.Now().Add(-time.Minute).Unix()), }, sshSigner) assert.FatalError(t, err) tok, err := generateSSHPOPToken(p, cert, jwk) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; sshpop certificate validBefore is in the past"), } }, "fail/no-signer-found": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.HostCert}, sshSigner) assert.FatalError(t, err) tok, err := generateSSHPOPToken(p, cert, jwk) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; could not find valid ca signer to verify sshpop certificate"), } }, "fail/error-parsing-claims-bad-sig": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, _, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) otherJWK, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "", 0) assert.FatalError(t, err) tok, err := generateSSHPOPToken(p, cert, otherJWK) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; error parsing sshpop token claims"), } }, "fail/invalid-claims-issuer": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateToken("foo", "bar", testAudiences.Sign[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; invalid sshpop token"), } }, "fail/invalid-audience": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateToken("foo", p.GetName(), "invalid-aud", "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; sshpop token has invalid audience claim (aud)"), } }, "fail/empty-subject": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateToken("", p.GetName(), testAudiences.Sign[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusUnauthorized, err: errors.New("sshpop.authorizeToken; sshpop token subject cannot be empty"), } }, "ok": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateSSHPOPToken(p, cert, jwk) assert.FatalError(t, err) return test{ p: p, token: tok, } }, } for name, tt := range tests { t.Run(name, func(t *testing.T) { tc := tt(t) if claims, err := tc.p.authorizeToken(tc.token, testAudiences.Sign, true); err != nil { sc, ok := err.(render.StatusCodedError) assert.Fatal(t, ok, "error does not implement StatusCodedError interface") assert.Equals(t, sc.StatusCode(), tc.code) if assert.NotNil(t, tc.err) { assert.HasPrefix(t, err.Error(), tc.err.Error()) } } else if assert.Nil(t, tc.err) { assert.NotNil(t, claims) } }) } } func TestSSHPOP_AuthorizeSSHRevoke(t *testing.T) { key, err := pemutil.Read("./testdata/secrets/ssh_user_ca_key") assert.FatalError(t, err) signer, ok := key.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh signing key to crypto signer") sshSigner, err := ssh.NewSignerFromSigner(signer) assert.FatalError(t, err) type test struct { p *SSHPOP token string err error code int } tests := map[string]func(*testing.T) test{ "fail/bad-token": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) return test{ p: p, token: "foo", code: http.StatusUnauthorized, err: errors.New("sshpop.AuthorizeSSHRevoke: sshpop.authorizeToken; error extracting sshpop header from token: extractSSHPOPCert; error parsing token: "), } }, "fail/subject-not-equal-serial": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateToken("foo", p.GetName(), testAudiences.SSHRevoke[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusBadRequest, err: errors.New("sshpop token subject must be equivalent to sshpop certificate serial number"), } }, "ok": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{Serial: 123455, CertType: ssh.UserCert}, sshSigner) assert.FatalError(t, err) tok, err := generateToken("123455", p.GetName(), testAudiences.SSHRevoke[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, } }, } for name, tt := range tests { t.Run(name, func(t *testing.T) { tc := tt(t) if err := tc.p.AuthorizeSSHRevoke(context.Background(), tc.token); err != nil { sc, ok := err.(render.StatusCodedError) assert.Fatal(t, ok, "error does not implement StatusCodedError interface") assert.Equals(t, sc.StatusCode(), tc.code) if assert.NotNil(t, tc.err) { assert.HasPrefix(t, err.Error(), tc.err.Error()) } } else { assert.Nil(t, tc.err) } }) } } func TestSSHPOP_AuthorizeSSHRenew(t *testing.T) { key, err := pemutil.Read("./testdata/secrets/ssh_user_ca_key") assert.FatalError(t, err) userSigner, ok := key.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh user signing key to crypto signer") sshUserSigner, err := ssh.NewSignerFromSigner(userSigner) assert.FatalError(t, err) hostKey, err := pemutil.Read("./testdata/secrets/ssh_host_ca_key") assert.FatalError(t, err) hostSigner, ok := hostKey.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh host signing key to crypto signer") sshHostSigner, err := ssh.NewSignerFromSigner(hostSigner) assert.FatalError(t, err) type test struct { p *SSHPOP token string cert *ssh.Certificate err error code int } tests := map[string]func(*testing.T) test{ "fail/bad-token": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) return test{ p: p, token: "foo", code: http.StatusUnauthorized, err: errors.New("sshpop.AuthorizeSSHRenew: sshpop.authorizeToken; error extracting sshpop header from token: extractSSHPOPCert; error parsing token: "), } }, "fail/not-host-cert": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshUserSigner) assert.FatalError(t, err) tok, err := generateToken("foo", p.GetName(), testAudiences.SSHRenew[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusBadRequest, err: errors.New("sshpop certificate must be a host ssh certificate"), } }, "ok": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{Serial: 123455, CertType: ssh.HostCert}, sshHostSigner) assert.FatalError(t, err) tok, err := generateToken("123455", p.GetName(), testAudiences.SSHRenew[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, cert: cert, } }, } for name, tt := range tests { t.Run(name, func(t *testing.T) { tc := tt(t) if cert, err := tc.p.AuthorizeSSHRenew(context.Background(), tc.token); err != nil { if assert.NotNil(t, tc.err) { sc, ok := err.(render.StatusCodedError) assert.Fatal(t, ok, "error does not implement StatusCodedError interface") assert.Equals(t, sc.StatusCode(), tc.code) assert.HasPrefix(t, err.Error(), tc.err.Error()) } } else { if assert.Nil(t, tc.err) { assert.Equals(t, tc.cert.Nonce, cert.Nonce) } } }) } } func TestSSHPOP_AuthorizeSSHRekey(t *testing.T) { key, err := pemutil.Read("./testdata/secrets/ssh_user_ca_key") assert.FatalError(t, err) userSigner, ok := key.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh user signing key to crypto signer") sshUserSigner, err := ssh.NewSignerFromSigner(userSigner) assert.FatalError(t, err) hostKey, err := pemutil.Read("./testdata/secrets/ssh_host_ca_key") assert.FatalError(t, err) hostSigner, ok := hostKey.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh host signing key to crypto signer") sshHostSigner, err := ssh.NewSignerFromSigner(hostSigner) assert.FatalError(t, err) type test struct { p *SSHPOP token string cert *ssh.Certificate err error code int } tests := map[string]func(*testing.T) test{ "fail/bad-token": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) return test{ p: p, token: "foo", code: http.StatusUnauthorized, err: errors.New("sshpop.AuthorizeSSHRekey: sshpop.authorizeToken; error extracting sshpop header from token: extractSSHPOPCert; error parsing token: "), } }, "fail/not-host-cert": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{CertType: ssh.UserCert}, sshUserSigner) assert.FatalError(t, err) tok, err := generateToken("foo", p.GetName(), testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, code: http.StatusBadRequest, err: errors.New("sshpop certificate must be a host ssh certificate"), } }, "ok": func(t *testing.T) test { p, err := generateSSHPOP() assert.FatalError(t, err) cert, jwk, err := createSSHCert(&ssh.Certificate{Serial: 123455, CertType: ssh.HostCert}, sshHostSigner) assert.FatalError(t, err) tok, err := generateToken("123455", p.GetName(), testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ p: p, token: tok, cert: cert, } }, } for name, tt := range tests { t.Run(name, func(t *testing.T) { tc := tt(t) if cert, opts, err := tc.p.AuthorizeSSHRekey(context.Background(), tc.token); err != nil { if assert.NotNil(t, tc.err) { sc, ok := err.(render.StatusCodedError) assert.Fatal(t, ok, "error does not implement StatusCodedError interface") assert.Equals(t, sc.StatusCode(), tc.code) assert.HasPrefix(t, err.Error(), tc.err.Error()) } } else { if assert.Nil(t, tc.err) { assert.Len(t, 3, opts) for _, o := range opts { switch v := o.(type) { case *sshDefaultPublicKeyValidator: case *sshCertDefaultValidator: case *sshCertValidityValidator: assert.Equals(t, v.Claimer, tc.p.ctl.Claimer) default: assert.FatalError(t, fmt.Errorf("unexpected sign option of type %T", v)) } } assert.Equals(t, tc.cert.Nonce, cert.Nonce) } } }) } } func TestSSHPOP_ExtractSSHPOPCert(t *testing.T) { hostKey, err := pemutil.Read("./testdata/secrets/ssh_host_ca_key") assert.FatalError(t, err) hostSigner, ok := hostKey.(crypto.Signer) assert.Fatal(t, ok, "could not cast ssh host signing key to crypto signer") sshHostSigner, err := ssh.NewSignerFromSigner(hostSigner) assert.FatalError(t, err) type test struct { token string cert *ssh.Certificate jwk *jose.JSONWebKey err error } tests := map[string]func(*testing.T) test{ "fail/bad-token": func(t *testing.T) test { return test{ token: "foo", err: errors.New("extractSSHPOPCert; error parsing token"), } }, "fail/sshpop-missing": func(t *testing.T) test { jwk, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "", 0) assert.FatalError(t, err) tok, err := generateToken("sub", "sshpop-provisioner", testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk) assert.FatalError(t, err) return test{ token: tok, err: errors.New("extractSSHPOPCert; token missing sshpop header"), } }, "fail/wrong-sshpop-type": func(t *testing.T) test { jwk, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "", 0) assert.FatalError(t, err) tok, err := generateToken("123455", "sshpop-provisioner", testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, func(so *jose.SignerOptions) error { so.WithHeader("sshpop", 12345) return nil }) assert.FatalError(t, err) return test{ token: tok, err: errors.New("extractSSHPOPCert; error unexpected type for sshpop header: "), } }, "fail/base64decode-error": func(t *testing.T) test { jwk, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "", 0) assert.FatalError(t, err) tok, err := generateToken("123455", "sshpop-provisioner", testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, func(so *jose.SignerOptions) error { so.WithHeader("sshpop", "!@#$%^&*") return nil }) assert.FatalError(t, err) return test{ token: tok, err: errors.New("extractSSHPOPCert; error base64 decoding sshpop header: illegal base64"), } }, "fail/parsing-sshpop-pubkey": func(t *testing.T) test { jwk, err := jose.GenerateJWK("EC", "P-256", "ES256", "sig", "", 0) assert.FatalError(t, err) tok, err := generateToken("123455", "sshpop-provisioner", testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, func(so *jose.SignerOptions) error { so.WithHeader("sshpop", base64.StdEncoding.EncodeToString([]byte("foo"))) return nil }) assert.FatalError(t, err) return test{ token: tok, err: errors.New("extractSSHPOPCert; error parsing ssh public key"), } }, "ok": func(t *testing.T) test { cert, jwk, err := createSSHCert(&ssh.Certificate{Serial: 123455, CertType: ssh.HostCert}, sshHostSigner) assert.FatalError(t, err) tok, err := generateToken("123455", "sshpop-provisioner", testAudiences.SSHRekey[0], "", []string{"test.smallstep.com"}, time.Now(), jwk, withSSHPOPFile(cert)) assert.FatalError(t, err) return test{ token: tok, jwk: jwk, cert: cert, } }, } for name, tt := range tests { t.Run(name, func(t *testing.T) { tc := tt(t) if cert, jwt, err := ExtractSSHPOPCert(tc.token); err != nil { if assert.NotNil(t, tc.err) { assert.HasPrefix(t, err.Error(), tc.err.Error()) } } else { if assert.Nil(t, tc.err) { assert.Equals(t, tc.cert.Nonce, cert.Nonce) assert.Equals(t, tc.jwk.KeyID, jwt.Headers[0].KeyID) } } }) } }