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|
package certcrypto
import (
"bytes"
"crypto"
"crypto/rand"
"crypto/rsa"
"encoding/pem"
"regexp"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestGeneratePrivateKey(t *testing.T) {
key, err := GeneratePrivateKey(RSA2048)
require.NoError(t, err, "Error generating private key")
assert.NotNil(t, key)
}
func TestGenerateCSR(t *testing.T) {
privateKey, err := rsa.GenerateKey(rand.Reader, 512)
require.NoError(t, err, "Error generating private key")
type expected struct {
len int
error bool
}
testCases := []struct {
desc string
privateKey crypto.PrivateKey
domain string
san []string
mustStaple bool
expected expected
}{
{
desc: "without SAN",
privateKey: privateKey,
domain: "lego.acme",
mustStaple: true,
expected: expected{len: 245},
},
{
desc: "without SAN",
privateKey: privateKey,
domain: "lego.acme",
san: []string{},
mustStaple: true,
expected: expected{len: 245},
},
{
desc: "with SAN",
privateKey: privateKey,
domain: "lego.acme",
san: []string{"a.lego.acme", "b.lego.acme", "c.lego.acme"},
mustStaple: true,
expected: expected{len: 296},
},
{
desc: "no domain",
privateKey: privateKey,
domain: "",
mustStaple: true,
expected: expected{len: 225},
},
{
desc: "no domain with SAN",
privateKey: privateKey,
domain: "",
san: []string{"a.lego.acme", "b.lego.acme", "c.lego.acme"},
mustStaple: true,
expected: expected{len: 276},
},
{
desc: "private key nil",
privateKey: nil,
domain: "fizz.buzz",
mustStaple: true,
expected: expected{error: true},
},
}
for _, test := range testCases {
test := test
t.Run(test.desc, func(t *testing.T) {
t.Parallel()
csr, err := GenerateCSR(test.privateKey, test.domain, test.san, test.mustStaple)
if test.expected.error {
require.Error(t, err)
} else {
require.NoError(t, err, "Error generating CSR")
assert.NotEmpty(t, csr)
assert.Len(t, csr, test.expected.len)
}
})
}
}
func TestPEMEncode(t *testing.T) {
buf := bytes.NewBufferString("TestingRSAIsSoMuchFun")
reader := MockRandReader{b: buf}
key, err := rsa.GenerateKey(reader, 32)
require.NoError(t, err, "Error generating private key")
data := PEMEncode(key)
require.NotNil(t, data)
exp := regexp.MustCompile(`^-----BEGIN RSA PRIVATE KEY-----\s+\S{60,}\s+-----END RSA PRIVATE KEY-----\s+`)
assert.Regexp(t, exp, string(data))
}
func TestParsePEMCertificate(t *testing.T) {
privateKey, err := GeneratePrivateKey(RSA2048)
require.NoError(t, err, "Error generating private key")
expiration := time.Now().Add(365).Round(time.Second)
certBytes, err := generateDerCert(privateKey.(*rsa.PrivateKey), expiration, "test.com", nil)
require.NoError(t, err, "Error generating cert")
buf := bytes.NewBufferString("TestingRSAIsSoMuchFun")
// Some random string should return an error.
cert, err := ParsePEMCertificate(buf.Bytes())
require.Errorf(t, err, "returned %v", cert)
// A DER encoded certificate should return an error.
_, err = ParsePEMCertificate(certBytes)
require.Error(t, err, "Expected to return an error for DER certificates")
// A PEM encoded certificate should work ok.
pemCert := PEMEncode(DERCertificateBytes(certBytes))
cert, err = ParsePEMCertificate(pemCert)
require.NoError(t, err)
assert.Equal(t, expiration.UTC(), cert.NotAfter)
}
func TestParsePEMPrivateKey(t *testing.T) {
privateKey, err := GeneratePrivateKey(RSA2048)
require.NoError(t, err, "Error generating private key")
pemPrivateKey := PEMEncode(privateKey)
// Decoding a key should work and create an identical key to the original
decoded, err := ParsePEMPrivateKey(pemPrivateKey)
require.NoError(t, err)
assert.Equal(t, decoded, privateKey)
// Decoding a PEM block that doesn't contain a private key should error
_, err = ParsePEMPrivateKey(pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE"}))
require.Errorf(t, err, "Expected to return an error for non-private key input")
// Decoding a PEM block that doesn't actually contain a key should error
_, err = ParsePEMPrivateKey(pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY"}))
require.Errorf(t, err, "Expected to return an error for empty input")
// Decoding non-PEM input should return an error
_, err = ParsePEMPrivateKey([]byte("This is not PEM"))
require.Errorf(t, err, "Expected to return an error for non-PEM input")
}
type MockRandReader struct {
b *bytes.Buffer
}
func (r MockRandReader) Read(p []byte) (int, error) {
return r.b.Read(p)
}
|
