package crypto import ( "crypto/ecdsa" "crypto/elliptic" "crypto/rand" "crypto/x509" "encoding/hex" "math/big" "strconv" "testing" "github.com/nspcc-dev/neofs-crypto/test" "github.com/stretchr/testify/require" ) var testKeys = [...]string{ "0375099c302b77664a2508bec1cae47903857b762c62713f190e8d99912ef76737", "025188d33a3113ac77fea0c17137e434d704283c234400b9b70bcdf4829094374a", "02c4c574d1bbe7efb2feaeed99e6c03924d6d3c9ad76530437d75c07bff3ddcc0f", "02563eece0b9035e679d28e2d548072773c43ce44a53cb7f30d3597052210dbb70", "02f8152966ad33b3c2622bdd032f5989fbd63a9a3af34e12eefee912c37defc880", "0252d9fd2376f6b3bcb4706cad54ec031d95a1a70414129286c247cd2bc521f73f", "0251ec65b2496b1d8ece3efe68a8b57ce7bc75b4171f07fa5b26c63a27fb4f9216", "025f7d63e18e6b896730f45989b7a8d00c0b86c75c2b834d903bc681833592bdcc", "02d351a4c87ec3b33e62610cb3fd197962c0081bbe1b1b888bc41844f4c6df9cd3", "036e3859e6ab43c0f45b7891761f0da86a7b62f931f3d963efd3103924920a73b3", "03c02a93134f98d9c78ec54b1b1f97fc64cd81360f53a293f41e4ad54aac3c5717", "03fea219d4ccfd7641cebbb2439740bb4bd7c4730c1abd6ca1dc44386533816df9", "02a33413277a319cc6fd4c54a2feb9032eba668ec587f307e319dc48733087fa61", } func Test_decompressPoints(t *testing.T) { t.Run("prepared public keys: decompressPoints", func(t *testing.T) { for i := range testKeys { bytes, err := hex.DecodeString(testKeys[i]) require.NoErrorf(t, err, testKeys[i]) x, y := decompressPoints(new(big.Int).SetBytes(bytes[1:]), uint(bytes[0])) require.NotNil(t, x) require.NotNil(t, y) res := MarshalPublicKey(&ecdsa.PublicKey{Curve: curve, X: x, Y: y}) require.Equal(t, testKeys[i], hex.EncodeToString(res)) } }) } func TestMarshalUnmarshal(t *testing.T) { t.Run("prepared public keys: unmarshal / marshal", func(t *testing.T) { for i := range testKeys { bytes, err := hex.DecodeString(testKeys[i]) require.NoErrorf(t, err, testKeys[i]) key := UnmarshalPublicKey(bytes) res := MarshalPublicKey(key) require.Equal(t, testKeys[i], hex.EncodeToString(res)) } }) t.Run("try to use stored keys", func(t *testing.T) { for i := 0; i < 10; i++ { i := i sk := test.DecodeKey(i) t.Run("marshal key_"+strconv.Itoa(i), func(t *testing.T) { bytes := MarshalPublicKey(&sk.PublicKey) require.Equal(t, testKeys[i], hex.EncodeToString(bytes)) }) t.Run("unmarshal key_"+strconv.Itoa(i), func(t *testing.T) { bytes, err := hex.DecodeString(testKeys[i]) require.NoError(t, err) pk := UnmarshalPublicKey(bytes) require.Equal(t, pk, &sk.PublicKey) }) } }) t.Run("prepared private key: unmarshal / marshal", func(t *testing.T) { walletPublicKey := "03fb2e07eba5477dd7de3f627d8803eb86bc36b98132f51d81017343bb6585d9c7" walletPrivateKey := "dc80f6900b7b7a791496c06aa77695d744fafaaeff5c143801eb97935448c671" data, err := hex.DecodeString(walletPrivateKey) require.NoError(t, err) _, err = x509.ParseECPrivateKey(data) require.Error(t, err) privateKey, err := UnmarshalPrivateKey(data) require.NoError(t, err) require.Equal(t, hex.EncodeToString(MarshalPublicKey(&privateKey.PublicKey)), walletPublicKey) require.Equal(t, data, MarshalPrivateKey(privateKey)) }) } func TestSignVerify(t *testing.T) { t.Run("should not fail when we pass bad data to unmarshalXY", func(t *testing.T) { var ( data = []byte("Hello world") key = test.DecodeKey(0) ) require.NotPanics(t, func() { { // 1. simple example UnmarshalPublicKey(nil) } { // 2. pass bad data (not public key) r1, s1, err := ecdsa.Sign(rand.Reader, key, hashBytes(data)) require.NoError(t, err) sign := marshalXY(r1, s1) UnmarshalPublicKey(sign) } { // 3. bad big.Ints sign := marshalXY(big.NewInt(0), big.NewInt(1)) UnmarshalPublicKey(sign) } }) }) t.Run("low level", func(t *testing.T) { var ( data = []byte("Hello world") curve = elliptic.P256() key = test.DecodeKey(0) ) r1, s1, err := ecdsa.Sign(rand.Reader, key, hashBytes(data)) require.NoError(t, err) sign := marshalXY(r1, s1) { // This is just to validate, that we are on right way.. try to unmarshal R/S from sign // validate bytes length byteLen := (curve.Params().BitSize + 7) >> 3 require.Len(t, sign, 1+2*byteLen) // uncompressed form? require.Equal(t, byte(4), sign[0]) // validate R / S p := curve.Params().P r := new(big.Int).SetBytes(sign[1 : 1+byteLen]) s := new(big.Int).SetBytes(sign[1+byteLen:]) require.True(t, r.Cmp(p) < 0) require.True(t, s.Cmp(p) < 0) // don't check curves // require.True(t, curve.IsOnCurve(r, s)) } r2, s2 := unmarshalXY(sign) require.NotNil(t, r2) require.NotNil(t, s2) require.Equal(t, r1.Bytes(), r2.Bytes()) require.Equal(t, s2.Bytes(), s2.Bytes()) }) t.Run("high level", func(t *testing.T) { var ( data = []byte("Hello world") key = test.DecodeKey(0) ) sign, err := Sign(key, data) require.NoError(t, err) for i := 0; i < 100; i++ { require.NoError(t, Verify(&key.PublicKey, data, sign)) } }) }