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package scrypt
import (
"fmt"
"reflect"
"testing"
"time"
)
// Test cases
var (
testLengths = []int{1, 8, 16, 32, 100, 500, 2500}
password = "super-secret-password"
)
var testParams = []struct {
pass bool
params Params
}{
{true, Params{16384, 8, 1, 32, 64}},
{true, Params{16384, 8, 1, 16, 32}},
{true, Params{65536, 8, 1, 16, 64}},
{true, Params{1048576, 8, 2, 64, 128}},
{false, Params{-1, 8, 1, 16, 32}}, // invalid N
{false, Params{0, 8, 1, 16, 32}}, // invalid N
{false, Params{1<<31 - 1, 8, 1, 16, 32}}, // invalid N
{false, Params{16384, 0, 12, 16, 32}}, // invalid R
{false, Params{16384, 8, 0, 16, 32}}, // invalid R > maxInt/128/P
{false, Params{16384, 1 << 24, 1, 16, 32}}, // invalid R > maxInt/256
{false, Params{1<<31 - 1, 8, 0, 16, 32}}, // invalid p < 0
{false, Params{4096, 8, 1, 5, 32}}, // invalid SaltLen
{false, Params{4096, 8, 1, 16, 2}}, // invalid DKLen
}
var testHashes = []struct {
pass bool
hash string
}{
{false, "1$8$1$9003d0e8e69482843e6bd560c2c9cd94$1976f233124e0ee32bb2678eb1b0ed668eb66cff6fa43279d1e33f6e81af893b"}, // N too small
{false, "$9003d0e8e69482843e6bd560c2c9cd94$1976f233124e0ee32bb2678eb1b0ed668eb66cff6fa43279d1e33f6e81af893b"}, // too short
{false, "16384#8#1#18fbc325efa37402d27c3c2172900cbf$d4e5e1b9eedc1a6a14aad6624ab57b7b42ae75b9c9845fde32de765835f2aaf9"}, // incorrect separators
{false, "16384$nogood$1$18fbc325efa37402d27c3c2172900cbf$d4e5e1b9eedc1a6a14aad6624ab57b7b42ae75b9c9845fde32de765835f2aaf9"}, // invalid R
{false, "16384$8$abc1$18fbc325efa37402d27c3c2172900cbf$d4e5e1b9eedc1a6a14aad6624ab57b7b42ae75b9c9845fde32de765835f2aaf9"}, // invalid P
{false, "16384$8$1$Tk9QRQ==$d4e5e1b9eedc1a6a14aad6624ab57b7b42ae75b9c9845fde32de765835f2aaf9"}, // invalid salt (not hex)
{false, "16384$8$1$18fbc325efa37402d27c3c2172900cbf$42ae====/75b9c9845fde32de765835f2aaf9"}, // invalid dk (not hex)
}
func TestGenerateRandomBytes(t *testing.T) {
for _, v := range testLengths {
_, err := GenerateRandomBytes(v)
if err != nil {
t.Fatalf("failed to generate random bytes")
}
}
}
func TestGenerateFromPassword(t *testing.T) {
for _, v := range testParams {
_, err := GenerateFromPassword([]byte(password), v.params)
if err != nil && v.pass == true {
t.Fatalf("no error was returned when expected for params: %+v", v.params)
}
}
}
func TestCompareHashAndPassword(t *testing.T) {
hash, err := GenerateFromPassword([]byte(password), DefaultParams)
if err != nil {
t.Fatal(err)
}
if err := CompareHashAndPassword(hash, []byte(password)); err != nil {
t.Fatal(err)
}
if err := CompareHashAndPassword(hash, []byte("invalid-password")); err == nil {
t.Fatalf("mismatched passwords did not produce an error")
}
invalidHash := []byte("$166$$11$a2ad56a415af5")
if err := CompareHashAndPassword(invalidHash, []byte(password)); err == nil {
t.Fatalf("did not identify an invalid hash")
}
}
func TestCost(t *testing.T) {
hash, err := GenerateFromPassword([]byte(password), DefaultParams)
if err != nil {
t.Fatal(err)
}
params, err := Cost(hash)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(params, DefaultParams) {
t.Fatal("cost mismatch: parameters used did not match those retrieved")
}
}
func TestDecodeHash(t *testing.T) {
for _, v := range testHashes {
_, err := Cost([]byte(v.hash))
if err == nil && v.pass == false {
t.Fatal("invalid hash: did not correctly detect invalid password hash")
}
}
}
func TestCalibrate(t *testing.T) {
timeout := 500 * time.Millisecond
for testNum, tc := range []struct {
MemMiB int
}{
{64},
{32},
{16},
{8},
{1},
} {
var (
p Params
err error
)
p, err = Calibrate(timeout, tc.MemMiB, p)
if err != nil {
t.Fatalf("%d. %#v: %v", testNum, p, err)
}
if (128*p.R*p.N)>>20 > tc.MemMiB {
t.Errorf("%d. wanted memory limit %d, got %d.", testNum, tc.MemMiB, (128*p.R*p.N)>>20)
}
start := time.Now()
_, err = GenerateFromPassword([]byte(password), p)
dur := time.Since(start)
t.Logf("GenerateFromPassword with %#v took %s (%v)", p, dur, err)
if err != nil {
t.Fatalf("%d. GenerateFromPassword with %#v: %v", testNum, p, err)
}
if dur < timeout/2 {
t.Errorf("%d. GenerateFromPassword was too fast (wanted around %s, got %s) with %#v.", testNum, timeout, dur, p)
} else if timeout*2 < dur {
t.Errorf("%d. GenerateFromPassword took too long (wanted around %s, got %s) with %#v.", testNum, timeout, dur, p)
}
}
}
func ExampleCalibrate() {
p, err := Calibrate(1*time.Second, 128, Params{})
if err != nil {
panic(err)
}
dk, err := GenerateFromPassword([]byte("super-secret-password"), p)
fmt.Printf("generated password is %q (%v)", dk, err)
}
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