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package encrypted
import (
"encoding/json"
"strings"
"testing"
. "gopkg.in/check.v1"
)
var (
kdfVectors = map[KDFParameterStrength][]byte{
Legacy: []byte(`{"kdf":{"name":"scrypt","params":{"N":32768,"r":8,"p":1},"salt":"WO3mVvyTwJ9vwT5/Tk5OW5WPIBUofMjcpEfrLnfY4uA="},"cipher":{"name":"nacl/secretbox","nonce":"tCy7HcTFr4uxv4Nrg/DWmncuZ148U1MX"},"ciphertext":"08n43p5G5yviPEZpO7tPPF4aZQkWiWjkv4taFdhDBA0tamKH4nw="}`),
Standard: []byte(`{"kdf":{"name":"scrypt","params":{"N":65536,"r":8,"p":1},"salt":"FhzPOt9/bJG4PTq6lQ6ecG6GzaOuOy/ynG5+yRiFlNs="},"cipher":{"name":"nacl/secretbox","nonce":"aw1ng1jHaDz/tQ7V2gR9O2+IGQ8xJEuE"},"ciphertext":"HycvuLZL4sYH0BrYTh4E/H20VtAW6u5zL5Pr+IBjYLYnCPzDkq8="}`),
OWASP: []byte(`{"kdf":{"name":"scrypt","params":{"N":131072,"r":8,"p":1},"salt":"m38E3kouJTtiheLQN22NQ8DTito5hrjpUIskqcd375k="},"cipher":{"name":"nacl/secretbox","nonce":"Y6PM13yA+o44pE/W1ZBwczeGnTV/m9Zc"},"ciphertext":"6H8sqj1K6B6yDjtH5AQ6lbFigg/C2yDDJc4rYJ79w9aVPImFIPI="}`),
}
)
// Hook up gocheck into the "go test" runner.
func Test(t *testing.T) { TestingT(t) }
type EncryptedSuite struct{}
var _ = Suite(&EncryptedSuite{})
var plaintext = []byte("reallyimportant")
func (EncryptedSuite) TestRoundtrip(c *C) {
passphrase := []byte("supersecret")
enc, err := Encrypt(plaintext, passphrase)
c.Assert(err, IsNil)
// successful decrypt
dec, err := Decrypt(enc, passphrase)
c.Assert(err, IsNil)
c.Assert(dec, DeepEquals, plaintext)
// wrong passphrase
passphrase[0] = 0
dec, err = Decrypt(enc, passphrase)
c.Assert(err, NotNil)
c.Assert(dec, IsNil)
}
func (EncryptedSuite) TestTamperedRoundtrip(c *C) {
passphrase := []byte("supersecret")
enc, err := Encrypt(plaintext, passphrase)
c.Assert(err, IsNil)
data := &data{}
err = json.Unmarshal(enc, data)
c.Assert(err, IsNil)
data.Ciphertext[0] = ^data.Ciphertext[0]
enc, _ = json.Marshal(data)
dec, err := Decrypt(enc, passphrase)
c.Assert(err, NotNil)
c.Assert(dec, IsNil)
}
func (EncryptedSuite) TestDecrypt(c *C) {
enc := []byte(`{"kdf":{"name":"scrypt","params":{"N":32768,"r":8,"p":1},"salt":"N9a7x5JFGbrtB2uBR81jPwp0eiLR4A7FV3mjVAQrg1g="},"cipher":{"name":"nacl/secretbox","nonce":"2h8HxMmgRfuYdpswZBQaU3xJ1nkA/5Ik"},"ciphertext":"SEW6sUh0jf2wfdjJGPNS9+bkk2uB+Cxamf32zR8XkQ=="}`)
passphrase := []byte("supersecret")
dec, err := Decrypt(enc, passphrase)
c.Assert(err, IsNil)
c.Assert(dec, DeepEquals, plaintext)
}
func (EncryptedSuite) TestMarshalUnmarshal(c *C) {
passphrase := []byte("supersecret")
wrapped, err := Marshal(plaintext, passphrase)
c.Assert(err, IsNil)
c.Assert(wrapped, NotNil)
var protected []byte
err = Unmarshal(wrapped, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
func (EncryptedSuite) TestInvalidKDFSettings(c *C) {
passphrase := []byte("supersecret")
wrapped, err := MarshalWithCustomKDFParameters(plaintext, passphrase, 0)
c.Assert(err, IsNil)
c.Assert(wrapped, NotNil)
var protected []byte
err = Unmarshal(wrapped, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
func (EncryptedSuite) TestLegacyKDFSettings(c *C) {
passphrase := []byte("supersecret")
wrapped, err := MarshalWithCustomKDFParameters(plaintext, passphrase, Legacy)
c.Assert(err, IsNil)
c.Assert(wrapped, NotNil)
var protected []byte
err = Unmarshal(wrapped, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
func (EncryptedSuite) TestStandardKDFSettings(c *C) {
passphrase := []byte("supersecret")
wrapped, err := MarshalWithCustomKDFParameters(plaintext, passphrase, Standard)
c.Assert(err, IsNil)
c.Assert(wrapped, NotNil)
var protected []byte
err = Unmarshal(wrapped, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
func (EncryptedSuite) TestOWASPKDFSettings(c *C) {
passphrase := []byte("supersecret")
wrapped, err := MarshalWithCustomKDFParameters(plaintext, passphrase, OWASP)
c.Assert(err, IsNil)
c.Assert(wrapped, NotNil)
var protected []byte
err = Unmarshal(wrapped, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
func (EncryptedSuite) TestKDFSettingVectors(c *C) {
passphrase := []byte("supersecret")
for _, v := range kdfVectors {
var protected []byte
err := Unmarshal(v, &protected, passphrase)
c.Assert(err, IsNil)
c.Assert(protected, DeepEquals, plaintext)
}
}
func (EncryptedSuite) TestUnsupportedKDFParameters(c *C) {
enc := []byte(`{"kdf":{"name":"scrypt","params":{"N":99,"r":99,"p":99},"salt":"cZFcQJdwPhPyhU1R4qkl0qVOIjZd4V/7LYYAavq166k="},"cipher":{"name":"nacl/secretbox","nonce":"7vhRS7j0hEPBWV05skAdgLj81AkGeE7U"},"ciphertext":"6WYU/YSXVbYzl/NzaeAzmjLyfFhOOjLc0d8/GFV0aBFdJvyCcXc="}`)
passphrase := []byte("supersecret")
dec, err := Decrypt(enc, passphrase)
c.Assert(err, NotNil)
c.Assert(dec, IsNil)
c.Assert(strings.Contains(err.Error(), "unsupported scrypt parameters"), Equals, true)
}
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