Add BDN test fixtures

Author: Stebalien

sign/bdn/bdn_test.go

@@ -1,6 +1,8 @@
 package bdn
 
 import (
+	"encoding"
+	"encoding/hex"
 	"fmt"
 	"testing"
 
@@ -158,3 +160,61 @@ func Benchmark_BDN_AggregateSigs(b *testing.B) {
 		AggregateSignatures(suite, [][]byte{sig1, sig2}, mask)
 	}
 }
+
+func unmarshalHex[T encoding.BinaryUnmarshaler](t *testing.T, into T, s string) T {
+	t.Helper()
+	b, err := hex.DecodeString(s)
+	require.NoError(t, err)
+	require.NoError(t, into.UnmarshalBinary(b))
+	return into
+}
+
+// This tests exists to make sure we don't accidentally make breaking changes to signature
+// aggregation by using checking against known aggregated signatures and keys.
+func TestBDNFixtures(t *testing.T) {
+	suite := bn256.NewSuite()
+	schemeOnG1 := NewSchemeOnG1(suite)
+
+	public1 := unmarshalHex(t, suite.G2().Point(), "1a30714035c7a161e286e54c191b8c68345bd8239c74925a26290e8e1ae97ed6657958a17dca12c943fadceb11b824402389ff427179e0f10194da3c1b771c6083797d2b5915ea78123cbdb99ea6389d6d6b67dcb512a2b552c373094ee5693524e3ebb4a176f7efa7285c25c80081d8cb598745978f1a63b886c09a316b1493")
+	private1 := unmarshalHex(t, suite.G2().Scalar(), "49cfe5e9f4532670137184d43c0299f8b635bcacf6b0af7cab262494602d9f38")
+	public2 := unmarshalHex(t, suite.G2().Point(), "603bc61466ec8762ec6de2ba9a80b9d302d08f580d1685ac45a8e404a6ed549719dc0faf94d896a9983ff23423772720e3de5d800bc200de6f7d7e146162d3183b8880c5c0d8b71ca4b3b40f30c12d8cc0679c81a47c239c6aa7e9cc2edab4a927fe865cd413c1c17e3df8f74108e784cd77dd3e161bdaf30019a55826a32a1f")
+	private2 := unmarshalHex(t, suite.G2().Scalar(), "493abea4bb35b74c78ad9245f9d37883aeb6ee91f7fb0d8a8e11abf7aa2be581")
+	public3 := unmarshalHex(t, suite.G2().Point(), "56118769a1f0b6286abacaa32109c1497ab0819c5d21f27317e184b6681c283007aa981cb4760de044946febdd6503ab77a4586bc29c04159e53a6fa5dcb9c0261ccd1cb2e28db5204ca829ac9f6be95f957a626544adc34ba3bc542533b6e2f5cbd0567e343641a61a42b63f26c3625f74b66f6f46d17b3bf1688fae4d455ec")
+	private3 := unmarshalHex(t, suite.G2().Scalar(), "7fb0ebc317e161502208c3c16a4af890dedc3c7b275e8a04e99c0528aa6a19aa")
+
+	sig1Exp, err := hex.DecodeString("0913b76987be19f943be23b636cab9a2484507717326bd8bbdcdbbb6b8d5eb9253cfb3597c3fa550ee4972a398813650825a871f8e0b242ae5ddbce1b7c0e2a8")
+	require.NoError(t, err)
+	sig2Exp, err := hex.DecodeString("21195d29b1863bca1559e24375211d1411d8a28a8f4c772870b07f4ccda2fd5e337c1315c210475c683e3aa8b87d3aed3f7255b3087daa30d1e1432dd61d7484")
+	require.NoError(t, err)
+	sig3Exp, err := hex.DecodeString("3c1ac80345c1733630dbdc8106925c867544b521c259f9fa9678d477e6e5d3d212b09bc0d95137c3dbc0af2241415156c56e757d5577a609293584d045593195")
+	require.NoError(t, err)
+
+	aggSigExp := unmarshalHex(t, suite.G1().Point(), "520875e6667e0acf489e458c6c2233d09af81afa3b2045e0ec2435cfc582ba2c44af281d688efcf991d20975ce32c9933a09f8c4b38c18ef4b4510d8fa0f09d7")
+	aggKeyExp := unmarshalHex(t, suite.G2().Point(), "394d47291878a81fefb17708c57cf8078b24c46bf4554b3012732acd15395dbf09f13a65e068de766f5449d1de130f09bf09dc35a67f7f822f2a187230e155891d40db3c51afa5b3e05a039c50d04ff9c788718a2887e34644a55a14a2a2679226a3315c281e03367a4d797db819625e0c662d35e45e0e9e7604c104179ae8a7")
+
+	msg := []byte("Hello many times Boneh-Lynn-Shacham")
+	sig1, err := schemeOnG1.Sign(private1, msg)
+	require.Nil(t, err)
+	require.Equal(t, sig1Exp, sig1)
+
+	sig2, err := schemeOnG1.Sign(private2, msg)
+	require.Nil(t, err)
+	require.Equal(t, sig2Exp, sig2)
+
+	sig3, err := schemeOnG1.Sign(private3, msg)
+	require.Nil(t, err)
+	require.Equal(t, sig3Exp, sig3)
+
+	mask, _ := sign.NewMask([]kyber.Point{public1, public2, public3}, nil)
+	mask.SetBit(0, true)
+	mask.SetBit(1, false)
+	mask.SetBit(2, true)
+
+	aggSig, err := schemeOnG1.AggregateSignatures([][]byte{sig1, sig2, sig3}, mask)
+	require.NoError(t, err)
+	require.True(t, aggSigExp.Equal(aggSig))
+
+	aggKey, err := schemeOnG1.AggregatePublicKeys(mask)
+	require.NoError(t, err)
+	require.True(t, aggKeyExp.Equal(aggKey))
+}