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package crypto
import (
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/tendermint/ed25519"
data "github.com/tendermint/go-wire/data"
)
func TestSignAndValidateEd25519(t *testing.T) {
privKey := GenPrivKeyEd25519()
pubKey := privKey.PubKey()
msg := CRandBytes(128)
sig := privKey.Sign(msg)
// Test the signature
assert.True(t, pubKey.VerifyBytes(msg, sig))
// Mutate the signature, just one bit.
sigEd := sig.Unwrap().(SignatureEd25519)
sigEd[7] ^= byte(0x01)
sig = sigEd.Wrap()
assert.False(t, pubKey.VerifyBytes(msg, sig))
}
func TestSignAndValidateSecp256k1(t *testing.T) {
privKey := GenPrivKeySecp256k1()
pubKey := privKey.PubKey()
msg := CRandBytes(128)
sig := privKey.Sign(msg)
assert.True(t, pubKey.VerifyBytes(msg, sig))
// Mutate the signature, just one bit.
sigEd := sig.Unwrap().(SignatureSecp256k1)
sigEd[3] ^= byte(0x01)
sig = sigEd.Wrap()
assert.False(t, pubKey.VerifyBytes(msg, sig))
}
func TestSignatureEncodings(t *testing.T) {
cases := []struct {
privKey PrivKey
sigSize int
sigType byte
sigName string
}{
{
privKey: GenPrivKeyEd25519().Wrap(),
sigSize: ed25519.SignatureSize,
sigType: TypeEd25519,
sigName: NameEd25519,
},
{
privKey: GenPrivKeySecp256k1().Wrap(),
sigSize: 0, // unknown
sigType: TypeSecp256k1,
sigName: NameSecp256k1,
},
}
for _, tc := range cases {
// note we embed them from the beginning....
pubKey := tc.privKey.PubKey()
msg := CRandBytes(128)
sig := tc.privKey.Sign(msg)
// store as wire
bin, err := data.ToWire(sig)
require.Nil(t, err, "%+v", err)
if tc.sigSize != 0 {
assert.Equal(t, tc.sigSize+1, len(bin))
}
assert.Equal(t, tc.sigType, bin[0])
// and back
sig2 := Signature{}
err = data.FromWire(bin, &sig2)
require.Nil(t, err, "%+v", err)
assert.EqualValues(t, sig, sig2)
assert.True(t, pubKey.VerifyBytes(msg, sig2))
// store as json
js, err := data.ToJSON(sig)
require.Nil(t, err, "%+v", err)
assert.True(t, strings.Contains(string(js), tc.sigName))
// and back
sig3 := Signature{}
err = data.FromJSON(js, &sig3)
require.Nil(t, err, "%+v", err)
assert.EqualValues(t, sig, sig3)
assert.True(t, pubKey.VerifyBytes(msg, sig3))
// and make sure we can textify it
text, err := data.ToText(sig)
require.Nil(t, err, "%+v", err)
assert.True(t, strings.HasPrefix(text, tc.sigName))
}
}
func TestWrapping(t *testing.T) {
// construct some basic constructs
msg := CRandBytes(128)
priv := GenPrivKeyEd25519()
pub := priv.PubKey()
sig := priv.Sign(msg)
// do some wrapping
pubs := []PubKey{
PubKey{nil},
pub.Wrap(),
pub.Wrap().Wrap().Wrap(),
PubKey{PubKey{PubKey{pub}}}.Wrap(),
}
for _, p := range pubs {
_, ok := p.PubKeyInner.(PubKey)
assert.False(t, ok)
}
sigs := []Signature{
Signature{nil},
sig.Wrap(),
sig.Wrap().Wrap().Wrap(),
Signature{Signature{Signature{sig}}}.Wrap(),
}
for _, s := range sigs {
_, ok := s.SignatureInner.(Signature)
assert.False(t, ok)
}
}