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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| package certs | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/rand" | ||
| "crypto/rsa" | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "encoding/pem" | ||
| "math/big" | ||
| "net" | ||
| "os" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| const certFilePath = "testdata/tls.crt" | ||
| const keyFilePath = "testdata/tls.key" | ||
|
|
||
| func TestCachedCertificateService_LoadsCertificateOnStartup(t *testing.T) { | ||
| defer cleanup() | ||
| cert, certData, keyData := createCerts() | ||
| writeCerts(t, certData, keyData) | ||
|
|
||
| cachedCertService := NewCachedCertificateService(certFilePath, keyFilePath) | ||
|
|
||
| result := cachedCertService.GetCertificate() | ||
|
|
||
| assert.Equal(t, cert, result) | ||
| } | ||
|
|
||
| func TestCachedCertificateService_PanicIfInitialLoadFails(t *testing.T) { | ||
| defer cleanup() | ||
|
|
||
| assert.Panics(t, func() { NewCachedCertificateService(certFilePath, keyFilePath) }) | ||
| } | ||
|
|
||
| func TestCachedCertificateService_ReloadsCert_IfFileOnDiskChanges(t *testing.T) { | ||
| defer cleanup() | ||
| cert, certData, keyData := createCerts() | ||
| writeCerts(t, certData, keyData) | ||
| cachedCertService := NewCachedCertificateService(certFilePath, keyFilePath) | ||
|
|
||
| assert.Equal(t, cert, cachedCertService.GetCertificate()) | ||
|
|
||
| newCert, certData, keyData := createCerts() | ||
|
|
||
| // Update files on disk | ||
| writeCerts(t, certData, keyData) | ||
| // Certificate won't change until refresh is called | ||
| assert.NotEqual(t, newCert, cachedCertService.GetCertificate()) | ||
|
|
||
| err := cachedCertService.refresh() | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, newCert, cachedCertService.GetCertificate()) | ||
| } | ||
|
|
||
| func TestCachedCertificateService_HandlesPartialUpdates(t *testing.T) { | ||
| defer cleanup() | ||
| originalCert, certData, keyData := createCerts() | ||
| writeCerts(t, certData, keyData) | ||
| cachedCertService := NewCachedCertificateService(certFilePath, keyFilePath) | ||
|
|
||
| assert.Equal(t, originalCert, cachedCertService.GetCertificate()) | ||
|
|
||
| newCert, certData, keyData := createCerts() | ||
|
|
||
| // Update only 1 file on disk - which leaves the representation on disk in an invalid state | ||
| writeCerts(t, certData, nil) | ||
| err := cachedCertService.refresh() | ||
| assert.Error(t, err) | ||
|
|
||
| // Certificate provided should not change, as there is no valid new cert yet | ||
| assert.Equal(t, originalCert, cachedCertService.GetCertificate()) | ||
|
|
||
| // Update the other file, so now files on disk are now both updated and consistent | ||
| writeCerts(t, nil, keyData) | ||
| err = cachedCertService.refresh() | ||
| assert.NoError(t, err) | ||
|
|
||
| assert.Equal(t, newCert, cachedCertService.GetCertificate()) | ||
| } | ||
|
|
||
| func writeCerts(t *testing.T, certData *bytes.Buffer, keyData *bytes.Buffer) { | ||
| if certData != nil { | ||
| err := os.WriteFile(certFilePath, certData.Bytes(), 0644) | ||
| require.NoError(t, err) | ||
| } | ||
|
|
||
| if keyData != nil { | ||
| err := os.WriteFile(keyFilePath, keyData.Bytes(), 0644) | ||
| require.NoError(t, err) | ||
| } | ||
| } | ||
|
|
||
| func cleanup() { | ||
| os.Remove(certFilePath) | ||
| os.Remove(keyFilePath) | ||
| } | ||
|
|
||
| func createCerts() (*tls.Certificate, *bytes.Buffer, *bytes.Buffer) { | ||
| // set up our CA certificate | ||
| ca := &x509.Certificate{ | ||
| SerialNumber: big.NewInt(2019), | ||
| NotBefore: time.Now(), | ||
| NotAfter: time.Now().AddDate(10, 0, 0), | ||
| IsCA: true, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth}, | ||
| KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign, | ||
| BasicConstraintsValid: true, | ||
| } | ||
|
|
||
| // create our private and public key | ||
| caPrivKey, err := rsa.GenerateKey(rand.Reader, 1024) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // create the CA | ||
| caBytes, err := x509.CreateCertificate(rand.Reader, ca, ca, &caPrivKey.PublicKey, caPrivKey) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // pem encode | ||
| caPEM := new(bytes.Buffer) | ||
| pem.Encode(caPEM, &pem.Block{ | ||
| Type: "CERTIFICATE", | ||
| Bytes: caBytes, | ||
| }) | ||
|
|
||
| caPrivKeyPEM := new(bytes.Buffer) | ||
| pem.Encode(caPrivKeyPEM, &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Bytes: x509.MarshalPKCS1PrivateKey(caPrivKey), | ||
| }) | ||
|
|
||
| // set up our server certificate | ||
| cert := &x509.Certificate{ | ||
| SerialNumber: big.NewInt(2019), | ||
| IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1), net.IPv6loopback}, | ||
| NotBefore: time.Now(), | ||
| NotAfter: time.Now().AddDate(10, 0, 0), | ||
| SubjectKeyId: []byte{1, 2, 3, 4, 6}, | ||
| ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth}, | ||
| KeyUsage: x509.KeyUsageDigitalSignature, | ||
| } | ||
|
|
||
| certPrivKey, err := rsa.GenerateKey(rand.Reader, 1024) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| certBytes, err := x509.CreateCertificate(rand.Reader, cert, ca, &certPrivKey.PublicKey, caPrivKey) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| certPEM := new(bytes.Buffer) | ||
| pem.Encode(certPEM, &pem.Block{ | ||
| Type: "CERTIFICATE", | ||
| Bytes: certBytes, | ||
| }) | ||
|
|
||
| certPrivKeyPEM := new(bytes.Buffer) | ||
| pem.Encode(certPrivKeyPEM, &pem.Block{ | ||
| Type: "RSA PRIVATE KEY", | ||
| Bytes: x509.MarshalPKCS1PrivateKey(certPrivKey), | ||
| }) | ||
|
|
||
| certificate, err := tls.X509KeyPair(certPEM.Bytes(), certPrivKeyPEM.Bytes()) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| return &certificate, certPEM, certPrivKeyPEM | ||
| } |
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