Merge pull request #545 from smallstep/mariano/fix-certificates-1917

Add support for setting the raw subject in the templates

Author: maraino

x509util/certificate.go

@@ -17,6 +17,7 @@ import (
 type Certificate struct {
 	Version               int                      `json:"version"`
 	Subject               Subject                  `json:"subject"`
+	RawSubject            []byte                   `json:"rawSubject"`
 	Issuer                Issuer                   `json:"issuer"`
 	SerialNumber          SerialNumber             `json:"serialNumber"`
 	DNSNames              MultiString              `json:"dnsNames"`
@@ -128,6 +129,7 @@ func (c *Certificate) GetCertificate() *x509.Certificate {
 	// Unparsed data
 	cert.PublicKey = c.PublicKey
 	cert.PublicKeyAlgorithm = c.PublicKeyAlgorithm
+	cert.RawSubject = c.RawSubject
 
 	// Subject
 	c.Subject.Set(cert)

x509util/certificate_request.go

@@ -45,6 +45,7 @@ type certificateRequest struct {
 type CertificateRequest struct {
 	Version            int                      `json:"version"`
 	Subject            Subject                  `json:"subject"`
+	RawSubject         []byte                   `json:"rawSubject"`
 	DNSNames           MultiString              `json:"dnsNames"`
 	EmailAddresses     MultiString              `json:"emailAddresses"`
 	IPAddresses        MultiIP                  `json:"ipAddresses"`
@@ -115,6 +116,7 @@ func NewCertificateRequestFromX509(cr *x509.CertificateRequest) *CertificateRequ
 	return &CertificateRequest{
 		Version:            cr.Version,
 		Subject:            newSubject(cr.Subject),
+		RawSubject:         cr.RawSubject,
 		DNSNames:           cr.DNSNames,
 		EmailAddresses:     cr.EmailAddresses,
 		IPAddresses:        cr.IPAddresses,
@@ -134,6 +136,7 @@ func (c *CertificateRequest) GetCertificateRequest() (*x509.CertificateRequest,
 	cert := c.GetCertificate().GetCertificate()
 	asn1Data, err := x509.CreateCertificateRequest(rand.Reader, &x509.CertificateRequest{
 		Subject:            cert.Subject,
+		RawSubject:         cert.RawSubject,
 		DNSNames:           cert.DNSNames,
 		IPAddresses:        cert.IPAddresses,
 		EmailAddresses:     cert.EmailAddresses,

x509util/certificate_test.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.step.sm/crypto/pemutil"
 )
 
 func createCertificateRequest(t *testing.T, commonName string, sans []string) (*x509.CertificateRequest, crypto.Signer) {
@@ -49,6 +50,21 @@ func createCertificateRequest(t *testing.T, commonName string, sans []string) (*
 	return cr, priv
 }
 
+func readCertificateRequest(t *testing.T, filename, keyFilename string) (*x509.CertificateRequest, crypto.Signer) {
+	t.Helper()
+
+	cr, err := pemutil.ReadCertificateRequest(filename)
+	require.NoError(t, err)
+
+	key, err := pemutil.Read(keyFilename)
+	require.NoError(t, err)
+
+	signer, ok := key.(crypto.Signer)
+	require.True(t, ok)
+
+	return cr, signer
+}
+
 func createIssuerCertificate(t *testing.T, commonName string) (*x509.Certificate, crypto.Signer) {
 	t.Helper()
 	now := time.Now()
@@ -135,6 +151,8 @@ func TestNewCertificate(t *testing.T) {
 		return ipNet
 	}
 
+	rawSubjectCR, rawSubjectKey := readCertificateRequest(t, "testdata/rawSubject.csr", "testdata/rawSubject.key")
+
 	type args struct {
 		cr   *x509.CertificateRequest
 		opts []Option
@@ -283,6 +301,38 @@ func TestNewCertificate(t *testing.T) {
 			PublicKey:          priv.Public(),
 			PublicKeyAlgorithm: x509.Ed25519,
 		}, false},
+		{"okRawSubject", args{rawSubjectCR, []Option{WithTemplateFile("./testdata/rawSubject.tpl", TemplateData{
+			SANsKey: []SubjectAlternativeName{
+				{Type: "dns", Value: "foo.com"},
+			},
+			CertificateRequestKey: NewCertificateRequestFromX509(rawSubjectCR),
+		})}}, &Certificate{
+			Subject: Subject{},
+			RawSubject: []byte{
+				0x30, 0x68, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03,
+				0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53, 0x31,
+				0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08,
+				0x0c, 0x0a, 0x43, 0x61, 0x6c, 0x69, 0x66, 0x6f,
+				0x72, 0x6e, 0x69, 0x61, 0x31, 0x16, 0x30, 0x14,
+				0x06, 0x03, 0x55, 0x04, 0x07, 0x0c, 0x0d, 0x53,
+				0x61, 0x6e, 0x20, 0x46, 0x72, 0x61, 0x6e, 0x63,
+				0x69, 0x73, 0x63, 0x6f, 0x31, 0x1d, 0x30, 0x1b,
+				0x06, 0x03, 0x55, 0x04, 0x0a, 0x0c, 0x14, 0x53,
+				0x6d, 0x61, 0x6c, 0x6c, 0x73, 0x74, 0x65, 0x70,
+				0x20, 0x4c, 0x61, 0x62, 0x73, 0x2c, 0x20, 0x49,
+				0x6e, 0x63, 0x2e, 0x31, 0x0d, 0x30, 0x0b, 0x06,
+				0x03, 0x55, 0x04, 0x03, 0x0c, 0x04, 0x54, 0x65,
+				0x73, 0x74,
+			},
+			SANs:     []SubjectAlternativeName{{Type: DNSType, Value: "foo.com"}},
+			KeyUsage: KeyUsage(x509.KeyUsageDigitalSignature),
+			ExtKeyUsage: ExtKeyUsage([]x509.ExtKeyUsage{
+				x509.ExtKeyUsageServerAuth,
+				x509.ExtKeyUsageClientAuth,
+			}),
+			PublicKey:          rawSubjectKey.Public(),
+			PublicKeyAlgorithm: x509.ECDSA,
+		}, false},
 		{"badSignature", args{crBadSignateure, nil}, nil, true},
 		{"failTemplate", args{cr, []Option{WithTemplate(`{{ fail "fatal error }}`, CreateTemplateData("commonName", []string{"foo.com"}))}}, nil, true},
 		{"missingTemplate", args{cr, []Option{WithTemplateFile("./testdata/missing.tpl", CreateTemplateData("commonName", []string{"foo.com"}))}}, nil, true},

x509util/testdata/rawSubject.csr

@@ -0,0 +1,9 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIBIjCBygIBADBoMQswCQYDVQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEW
+MBQGA1UEBwwNU2FuIEZyYW5jaXNjbzEdMBsGA1UECgwUU21hbGxzdGVwIExhYnMs
+IEluYy4xDTALBgNVBAMMBFRlc3QwWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAATG
+NLZtzv5dcl2Nz66XBV+tq5jKCH9WGPlsuBEq48NNUb1LzecjaVTZsEwe+ZpQbnzk
+wTdYXFI68HbovxWc9fDxoAAwCgYIKoZIzj0EAwIDRwAwRAIgODOqVqdeZzSwZOFB
+VZuSLoMVvCVoiFng8/2hXfJWJi4CIBNHEt9batonI4Z6Z0kij/qNTeTTWFd5yawX
+2DP2+6EP
+-----END CERTIFICATE REQUEST-----

x509util/testdata/rawSubject.key

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIK9FBgwqr6Zjsbf2uPmvnDz341AhiJbPLTuq8+/BLbd/oAoGCCqGSM49
+AwEHoUQDQgAExjS2bc7+XXJdjc+ulwVfrauYygh/Vhj5bLgRKuPDTVG9S83nI2lU
+2bBMHvmaUG585ME3WFxSOvB26L8VnPXw8Q==
+-----END EC PRIVATE KEY-----

x509util/testdata/rawSubject.tpl

@@ -0,0 +1,10 @@
+{
+	"rawSubject": {{ toJson .Insecure.CR.RawSubject }},
+	"sans": {{ toJson .SANs }},
+{{- if typeIs "*rsa.PublicKey" .Insecure.CR.PublicKey }}
+	"keyUsage": ["keyEncipherment", "digitalSignature"],
+{{- else }}
+	"keyUsage": ["digitalSignature"],
+{{- end }}
+	"extKeyUsage": ["serverAuth", "clientAuth"]
+}