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package crypto
import (
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func genPKCS1PrivKey() (*rsa.PrivateKey, string) {
rsaPriv, _ := rsa.GenerateKey(rand.Reader, 4096)
privBlock := &pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(rsaPriv),
}
return rsaPriv, string(pem.EncodeToMemory(privBlock))
}
// func derivePKIXPrivKey(priv *rsa.PrivateKey) string {
// privBlock := &pem.Block{
// Type: "RSA PRIVATE KEY",
// Bytes: x509.MarshalPKCS1PrivateKey(priv),
// }
// return string(pem.EncodeToMemory(privBlock))
// }
func derivePKIXPubKey(priv *rsa.PrivateKey) string {
b, _ := x509.MarshalPKIXPublicKey(&priv.PublicKey)
pubBlock := &pem.Block{
Type: "PUBLIC KEY",
Bytes: b,
}
testPubKey := string(pem.EncodeToMemory(pubBlock))
return testPubKey
}
func derivePKCS1PubKey(priv *rsa.PrivateKey) string {
b := x509.MarshalPKCS1PublicKey(&priv.PublicKey)
pubBlock := &pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: b,
}
testPubKey := string(pem.EncodeToMemory(pubBlock))
return testPubKey
}
func TestRSACrypt(t *testing.T) {
t.Parallel()
priv, testPrivKey := genPKCS1PrivKey()
testdata := []struct {
name string
encKey string
decKey string
in []byte
}{
{"pkix key", derivePKIXPubKey(priv), testPrivKey, []byte("hello world")},
{"pkcs1 key", derivePKCS1PubKey(priv), testPrivKey, []byte("hello world")},
}
for _, d := range testdata {
t.Run(d.name, func(t *testing.T) {
t.Parallel()
enc, err := RSAEncrypt(d.encKey, d.in)
require.NoError(t, err)
dec, err := RSADecrypt(d.decKey, enc)
require.NoError(t, err)
assert.Equal(t, d.in, dec)
})
}
t.Run("bad key", func(t *testing.T) {
t.Parallel()
in := []byte("hello world")
key := "bad key"
_, err := RSAEncrypt(key, in)
require.Error(t, err)
_, err = RSADecrypt(key, in)
require.Error(t, err)
})
t.Run("empty key", func(t *testing.T) {
t.Parallel()
in := []byte("hello world")
key := ""
_, err := RSAEncrypt(key, in)
require.Error(t, err)
_, err = RSADecrypt(key, in)
require.Error(t, err)
})
}
func TestRSAGenerateKey(t *testing.T) {
t.Parallel()
_, err := RSAGenerateKey(0)
require.Error(t, err)
_, err = RSAGenerateKey(12)
require.Error(t, err)
key, err := RSAGenerateKey(2048)
require.NoError(t, err)
assert.True(t, strings.HasPrefix(string(key),
"-----BEGIN RSA PRIVATE KEY-----"))
assert.True(t, strings.HasSuffix(string(key),
"-----END RSA PRIVATE KEY-----\n"))
}
func TestRSADerivePublicKey(t *testing.T) {
t.Parallel()
_, err := RSADerivePublicKey(nil)
require.Error(t, err)
_, err = RSADerivePublicKey([]byte(`-----BEGIN FOO-----
-----END FOO-----`))
require.Error(t, err)
priv, privKey := genPKCS1PrivKey()
expected := derivePKIXPubKey(priv)
actual, err := RSADerivePublicKey([]byte(privKey))
require.NoError(t, err)
assert.Equal(t, expected, string(actual))
}
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