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range_verifier_test.go
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range_verifier_test.go
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package bulletproof
import (
crand "crypto/rand"
"testing"
"github.com/gtank/merlin"
"github.com/stretchr/testify/require"
"github.com/coinbase/kryptology/pkg/core/curves"
)
func TestRangeVerifyHappyPath(t *testing.T) {
curve := curves.ED25519()
n := 256
prover, err := NewRangeProver(n, []byte("rangeDomain"), []byte("ippDomain"), *curve)
require.NoError(t, err)
v := curve.Scalar.Random(crand.Reader)
gamma := curve.Scalar.Random(crand.Reader)
g := curve.Point.Random(crand.Reader)
h := curve.Point.Random(crand.Reader)
u := curve.Point.Random(crand.Reader)
proofGenerators := RangeProofGenerators{
g: g,
h: h,
u: u,
}
transcript := merlin.NewTranscript("test")
proof, err := prover.Prove(v, gamma, n, proofGenerators, transcript)
require.NoError(t, err)
verifier, err := NewRangeVerifier(n, []byte("rangeDomain"), []byte("ippDomain"), *curve)
require.NoError(t, err)
transcriptVerifier := merlin.NewTranscript("test")
capV := getcapV(v, gamma, g, h)
verified, err := verifier.Verify(proof, capV, proofGenerators, n, transcriptVerifier)
require.NoError(t, err)
require.True(t, verified)
}
func TestRangeVerifyNotInRange(t *testing.T) {
curve := curves.ED25519()
n := 2
prover, err := NewRangeProver(n, []byte("rangeDomain"), []byte("ippDomain"), *curve)
require.NoError(t, err)
v := curve.Scalar.Random(crand.Reader)
gamma := curve.Scalar.Random(crand.Reader)
g := curve.Point.Random(crand.Reader)
h := curve.Point.Random(crand.Reader)
u := curve.Point.Random(crand.Reader)
proofGenerators := RangeProofGenerators{
g: g,
h: h,
u: u,
}
transcript := merlin.NewTranscript("test")
_, err = prover.Prove(v, gamma, n, proofGenerators, transcript)
require.Error(t, err)
}
func TestRangeVerifyNonRandom(t *testing.T) {
curve := curves.ED25519()
n := 2
prover, err := NewRangeProver(n, []byte("rangeDomain"), []byte("ippDomain"), *curve)
require.NoError(t, err)
v := curve.Scalar.One()
gamma := curve.Scalar.Random(crand.Reader)
g := curve.Point.Random(crand.Reader)
h := curve.Point.Random(crand.Reader)
u := curve.Point.Random(crand.Reader)
proofGenerators := RangeProofGenerators{
g: g,
h: h,
u: u,
}
transcript := merlin.NewTranscript("test")
proof, err := prover.Prove(v, gamma, n, proofGenerators, transcript)
require.NoError(t, err)
verifier, err := NewRangeVerifier(n, []byte("rangeDomain"), []byte("ippDomain"), *curve)
require.NoError(t, err)
transcriptVerifier := merlin.NewTranscript("test")
capV := getcapV(v, gamma, g, h)
verified, err := verifier.Verify(proof, capV, proofGenerators, n, transcriptVerifier)
require.NoError(t, err)
require.True(t, verified)
}