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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package bls | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "crypto/subtle" | ||
| "fmt" | ||
|
|
||
| "github.com/herumi/bls-eth-go-binary/bls" | ||
| amino "github.com/tendermint/go-amino" | ||
| "github.com/tendermint/tendermint/crypto" | ||
| "github.com/tendermint/tendermint/crypto/tmhash" | ||
| ) | ||
|
|
||
| var _ crypto.PrivKey = PrivKeyBLS12{} | ||
|
|
||
| const ( | ||
| PrivKeyAminoName = "tendermint/PrivKeyBLS12" | ||
| PubKeyAminoName = "tendermint/PubKeyBLS12" | ||
| PrivKeyBLS12Size = 32 | ||
| PubKeyBLS12Size = 48 | ||
| SignatureSize = 96 | ||
| ) | ||
|
|
||
| var cdc = amino.NewCodec() | ||
|
|
||
| func init() { | ||
| cdc.RegisterInterface((*crypto.PubKey)(nil), nil) | ||
| cdc.RegisterConcrete(PubKeyBLS12{}, | ||
| PubKeyAminoName, nil) | ||
|
|
||
| cdc.RegisterInterface((*crypto.PrivKey)(nil), nil) | ||
| cdc.RegisterConcrete(PrivKeyBLS12{}, | ||
| PrivKeyAminoName, nil) | ||
|
|
||
| err := bls.Init(bls.BLS12_381) | ||
| if err != nil { | ||
| panic(fmt.Sprintf("ERROR: %s", err)) | ||
| } | ||
| err = bls.SetETHmode(bls.EthModeLatest) | ||
| if err != nil { | ||
| panic(fmt.Sprintf("ERROR: %s", err)) | ||
| } | ||
| } | ||
|
|
||
| // PrivKeyBLS12 implements crypto.PrivKey. | ||
| type PrivKeyBLS12 [PrivKeyBLS12Size]byte | ||
|
|
||
| // GenPrivKey generates a new BLS12-381 private key. | ||
| func GenPrivKey() PrivKeyBLS12 { | ||
| sigKey := bls.SecretKey{} | ||
| sigKey.SetByCSPRNG() | ||
| sigKeyBinary := PrivKeyBLS12{} | ||
| copy(sigKeyBinary[:], sigKey.Serialize()) | ||
| return sigKeyBinary | ||
| } | ||
|
|
||
| // Bytes marshals the privkey using amino encoding. | ||
| func (privKey PrivKeyBLS12) Bytes() []byte { | ||
| return cdc.MustMarshalBinaryBare(privKey) | ||
| } | ||
|
|
||
| // Sign produces a signature on the provided message. | ||
| func (privKey PrivKeyBLS12) Sign(msg []byte) ([]byte, error) { | ||
| blsKey := bls.SecretKey{} | ||
| err := blsKey.Deserialize(privKey[:]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| sign := blsKey.SignByte(msg) | ||
| return sign.Serialize(), nil | ||
| } | ||
|
|
||
| // PubKey gets the corresponding public key from the private key. | ||
| func (privKey PrivKeyBLS12) PubKey() crypto.PubKey { | ||
| blsKey := bls.SecretKey{} | ||
| err := blsKey.Deserialize(privKey[:]) | ||
| if err != nil { | ||
| panic(fmt.Sprintf("Not a BLS12-381 private key: %X", privKey[:])) | ||
| } | ||
| pubKey := blsKey.GetPublicKey() | ||
| pubKeyBinary := PubKeyBLS12{} | ||
| copy(pubKeyBinary[:], pubKey.Serialize()) | ||
| return pubKeyBinary | ||
| } | ||
|
|
||
| // Equals - you probably don't need to use this. | ||
| // Runs in constant time based on length of the keys. | ||
| func (privKey PrivKeyBLS12) Equals(other crypto.PrivKey) bool { | ||
| if otherEd, ok := other.(PrivKeyBLS12); ok { | ||
| return subtle.ConstantTimeCompare(privKey[:], otherEd[:]) == 1 | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| var _ crypto.PubKey = PubKeyBLS12{} | ||
|
|
||
| // PubKeyBLS12 implements crypto.PubKey for the BLS12-381 signature scheme. | ||
| type PubKeyBLS12 [PubKeyBLS12Size]byte | ||
|
|
||
| // Address is the SHA256-20 of the raw pubkey bytes. | ||
| func (pubKey PubKeyBLS12) Address() crypto.Address { | ||
| return tmhash.SumTruncated(pubKey[:]) | ||
| } | ||
|
|
||
| // Bytes marshals the PubKey using amino encoding. | ||
| func (pubKey PubKeyBLS12) Bytes() []byte { | ||
| bz, err := cdc.MarshalBinaryBare(pubKey) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| return bz | ||
| } | ||
|
|
||
| func (pubKey PubKeyBLS12) VerifyBytes(msg []byte, sig []byte) bool { | ||
| // make sure we use the same algorithm to sign | ||
| if len(sig) != SignatureSize { | ||
| return false | ||
| } | ||
| blsPubKey := bls.PublicKey{} | ||
| err := blsPubKey.Deserialize(pubKey[:]) | ||
| if err != nil { | ||
| return false | ||
| } | ||
| blsSign := bls.Sign{} | ||
| err = blsSign.Deserialize(sig) | ||
| if err != nil { | ||
| fmt.Printf("Signature Deserialize failed: %s", err) | ||
| return false | ||
| } | ||
| return blsSign.VerifyByte(&blsPubKey, msg) | ||
| } | ||
|
|
||
| func (pubKey PubKeyBLS12) String() string { | ||
| return fmt.Sprintf("PubKeyBLS12{%X}", pubKey[:]) | ||
| } | ||
|
|
||
| // nolint: golint | ||
| func (pubKey PubKeyBLS12) Equals(other crypto.PubKey) bool { | ||
| if otherEd, ok := other.(PubKeyBLS12); ok { | ||
| return bytes.Equal(pubKey[:], otherEd[:]) | ||
| } | ||
| return false | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| package bls_test | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "testing" | ||
|
|
||
| b "github.com/herumi/bls-eth-go-binary/bls" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| "github.com/stretchr/testify/require" | ||
| "github.com/tendermint/tendermint/crypto" | ||
| "github.com/tendermint/tendermint/crypto/bls" | ||
| ) | ||
|
|
||
| func TestBasicSignatureFunctions(t *testing.T) { | ||
| privateKey := b.SecretKey{} | ||
| privateKey.SetByCSPRNG() | ||
| publicKey := privateKey.GetPublicKey() | ||
|
|
||
| duplicatedPrivateKey := b.SecretKey{} | ||
| err := duplicatedPrivateKey.Deserialize(privateKey.Serialize()) | ||
| if err != nil { | ||
| t.Fatalf("Private key deserialization failed.") | ||
| } | ||
|
|
||
| if len(privateKey.Serialize()) != bls.PrivKeyBLS12Size { | ||
| t.Fatalf("The constant size %d of the private key is different from the actual size %d.", | ||
| bls.PrivKeyBLS12Size, len(privateKey.Serialize())) | ||
| } | ||
|
|
||
| duplicatedPublicKey := b.PublicKey{} | ||
| err = duplicatedPublicKey.Deserialize(publicKey.Serialize()) | ||
| if err != nil { | ||
| t.Fatalf("Public key deserialization failed.") | ||
| } | ||
|
|
||
| if len(publicKey.Serialize()) != bls.PubKeyBLS12Size { | ||
| t.Fatalf("The constant size %d of the public key is different from the actual size %d.", | ||
| bls.PubKeyBLS12Size, len(publicKey.Serialize())) | ||
| } | ||
|
|
||
| duplicatedSignature := func(sig *b.Sign) *b.Sign { | ||
| duplicatedSign := b.Sign{} | ||
| err := duplicatedSign.Deserialize(sig.Serialize()) | ||
| if err != nil { | ||
| t.Fatalf("Signature deserialization failed.") | ||
| } | ||
|
|
||
| if len(sig.Serialize()) != bls.SignatureSize { | ||
| t.Fatalf("The constant size %d of the signature is different from the actual size %d.", | ||
| bls.SignatureSize, len(sig.Serialize())) | ||
| } | ||
| return &duplicatedSign | ||
| } | ||
|
|
||
| msg := []byte("hello, world") | ||
| for _, privKey := range []b.SecretKey{privateKey, duplicatedPrivateKey} { | ||
| for _, pubKey := range []*b.PublicKey{publicKey, &duplicatedPublicKey} { | ||
| signature := privKey.SignByte(msg) | ||
| if !signature.VerifyByte(pubKey, msg) { | ||
| t.Errorf("Signature verification failed.") | ||
| } | ||
|
|
||
| if !duplicatedSignature(signature).VerifyByte(pubKey, msg) { | ||
| t.Errorf("Signature verification failed.") | ||
| } | ||
|
|
||
| for i := 0; i < len(msg); i++ { | ||
| for j := 0; j < 8; j++ { | ||
| garbled := make([]byte, len(msg)) | ||
| copy(garbled, msg) | ||
| garbled[i] ^= 1 << (8 - j - 1) | ||
| if bytes.Equal(msg, garbled) { | ||
| t.Fatalf("Not a barbled message") | ||
| } | ||
| if signature.VerifyByte(pubKey, garbled) { | ||
| t.Errorf("Signature verification was successful against a garbled byte sequence.") | ||
| } | ||
| if duplicatedSignature(signature).VerifyByte(pubKey, garbled) { | ||
| t.Errorf("Signature verification was successful against a garbled byte sequence.") | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func TestSignatureAggregation(t *testing.T) { | ||
| publicKeys := make([]b.PublicKey, 25) | ||
| aggregatedSignature := b.Sign{} | ||
| aggregatedPublicKey := b.PublicKey{} | ||
| msg := []byte("hello, world") | ||
| for i := 0; i < len(publicKeys); i++ { | ||
| privateKey := b.SecretKey{} | ||
| privateKey.SetByCSPRNG() | ||
| publicKeys[i] = *privateKey.GetPublicKey() | ||
| aggregatedSignature.Add(privateKey.SignByte(msg)) | ||
| aggregatedPublicKey.Add(&publicKeys[i]) | ||
| } | ||
|
|
||
| if !aggregatedSignature.FastAggregateVerify(publicKeys, msg) { | ||
| t.Errorf("Aggregated signature verification failed.") | ||
| } | ||
| if !aggregatedSignature.VerifyByte(&aggregatedPublicKey, msg) { | ||
| t.Errorf("Aggregated signature verification failed.") | ||
| } | ||
| } | ||
|
|
||
| func TestSignAndValidateBLS12(t *testing.T) { | ||
| privKey := bls.GenPrivKey() | ||
| pubKey := privKey.PubKey() | ||
|
|
||
| msg := crypto.CRandBytes(128) | ||
| sig, err := privKey.Sign(msg) | ||
| require.Nil(t, err) | ||
| fmt.Printf("restoring signature: %x\n", sig) | ||
|
|
||
| // Test the signature | ||
| assert.True(t, pubKey.VerifyBytes(msg, sig)) | ||
|
|
||
| // Mutate the signature, just one bit. | ||
| // TODO: Replace this with a much better fuzzer, tendermint/ed25519/issues/10 | ||
| sig[7] ^= byte(0x01) | ||
|
|
||
| assert.False(t, pubKey.VerifyBytes(msg, sig)) | ||
| } |
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