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112 lines
4.5 KiB
112 lines
4.5 KiB
package multisig
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import (
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"math/rand"
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"testing"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/ed25519"
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"github.com/tendermint/tendermint/crypto/secp256k1"
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)
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// This tests multisig functionality, but it expects the first k signatures to be valid
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// TODO: Adapt it to give more flexibility about first k signatures being valid
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func TestThresholdMultisigValidCases(t *testing.T) {
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pkSet1, sigSet1 := generatePubKeysAndSignatures(5, []byte{1, 2, 3, 4})
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cases := []struct {
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msg []byte
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k int
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pubkeys []crypto.PubKey
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signingIndices []int
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// signatures should be the same size as signingIndices.
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signatures [][]byte
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passAfterKSignatures []bool
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}{
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{
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msg: []byte{1, 2, 3, 4},
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k: 2,
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pubkeys: pkSet1,
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signingIndices: []int{0, 3, 1},
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signatures: sigSet1,
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passAfterKSignatures: []bool{false},
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},
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}
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for tcIndex, tc := range cases {
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multisigKey := NewThresholdMultiSignaturePubKey(tc.k, tc.pubkeys)
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multisignature := NewMultisig(len(tc.pubkeys))
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for i := 0; i < tc.k-1; i++ {
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signingIndex := tc.signingIndices[i]
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multisignature.AddSignatureFromPubkey(tc.signatures[signingIndex], tc.pubkeys[signingIndex], tc.pubkeys)
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require.False(t, multisigKey.VerifyBytes(tc.msg, multisignature.Marshal()),
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"multisig passed when i < k, tc %d, i %d", tcIndex, i)
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multisignature.AddSignatureFromPubkey(tc.signatures[signingIndex], tc.pubkeys[signingIndex], tc.pubkeys)
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require.Equal(t, i+1, len(multisignature.Sigs),
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"adding a signature for the same pubkey twice increased signature count by 2, tc %d", tcIndex)
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}
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require.False(t, multisigKey.VerifyBytes(tc.msg, multisignature.Marshal()),
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"multisig passed with k - 1 sigs, tc %d", tcIndex)
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multisignature.AddSignatureFromPubkey(tc.signatures[tc.signingIndices[tc.k]], tc.pubkeys[tc.signingIndices[tc.k]], tc.pubkeys)
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require.True(t, multisigKey.VerifyBytes(tc.msg, multisignature.Marshal()),
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"multisig failed after k good signatures, tc %d", tcIndex)
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for i := tc.k + 1; i < len(tc.signingIndices); i++ {
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signingIndex := tc.signingIndices[i]
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multisignature.AddSignatureFromPubkey(tc.signatures[signingIndex], tc.pubkeys[signingIndex], tc.pubkeys)
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require.Equal(t, tc.passAfterKSignatures[i-tc.k-1],
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multisigKey.VerifyBytes(tc.msg, multisignature.Marshal()),
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"multisig didn't verify as expected after k sigs, tc %d, i %d", tcIndex, i)
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multisignature.AddSignatureFromPubkey(tc.signatures[signingIndex], tc.pubkeys[signingIndex], tc.pubkeys)
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require.Equal(t, i+1, len(multisignature.Sigs),
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"adding a signature for the same pubkey twice increased signature count by 2, tc %d", tcIndex)
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}
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}
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}
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// TODO: Fully replace this test with table driven tests
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func TestThresholdMultisigDuplicateSignatures(t *testing.T) {
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msg := []byte{1, 2, 3, 4, 5}
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pubkeys, sigs := generatePubKeysAndSignatures(5, msg)
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multisigKey := NewThresholdMultiSignaturePubKey(2, pubkeys)
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multisignature := NewMultisig(5)
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require.False(t, multisigKey.VerifyBytes(msg, multisignature.Marshal()))
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multisignature.AddSignatureFromPubkey(sigs[0], pubkeys[0], pubkeys)
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// Add second signature manually
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multisignature.Sigs = append(multisignature.Sigs, sigs[0])
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require.False(t, multisigKey.VerifyBytes(msg, multisignature.Marshal()))
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}
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// TODO: Fully replace this test with table driven tests
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func TestMultiSigPubkeyEquality(t *testing.T) {
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msg := []byte{1, 2, 3, 4}
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pubkeys, _ := generatePubKeysAndSignatures(5, msg)
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multisigKey := NewThresholdMultiSignaturePubKey(2, pubkeys)
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var unmarshalledMultisig *ThresholdMultiSignaturePubKey
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cdc.MustUnmarshalBinaryBare(multisigKey.Bytes(), &unmarshalledMultisig)
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require.True(t, multisigKey.Equals(unmarshalledMultisig))
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// Ensure that reordering pubkeys is treated as a different pubkey
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pubkeysCpy := make([]crypto.PubKey, 5)
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copy(pubkeysCpy, pubkeys)
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pubkeysCpy[4] = pubkeys[3]
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pubkeysCpy[3] = pubkeys[4]
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multisigKey2 := NewThresholdMultiSignaturePubKey(2, pubkeysCpy)
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require.False(t, multisigKey.Equals(multisigKey2))
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}
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func generatePubKeysAndSignatures(n int, msg []byte) (pubkeys []crypto.PubKey, signatures [][]byte) {
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pubkeys = make([]crypto.PubKey, n)
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signatures = make([][]byte, n)
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for i := 0; i < n; i++ {
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var privkey crypto.PrivKey
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if rand.Int63()%2 == 0 {
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privkey = ed25519.GenPrivKey()
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} else {
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privkey = secp256k1.GenPrivKey()
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}
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pubkeys[i] = privkey.PubKey()
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signatures[i], _ = privkey.Sign(msg)
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}
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return
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}
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