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package nizk
import (
"testing"
. "kesim.org/seal/common"
)
func TestStage2Simple1(t *testing.T) {
id := Curve.RandomScalar()
for _, lost := range []bool{true, false} {
b1 := NewBit(id, !lost)
c1 := b1.StageCommit()
r1, _ := b1.RevealStage1(c1.X)
// Because the first index is a junction, any subsequent
// combination of Bits must verify with 'lost' set to true
// in the RevealStage2 calls.
for _, s := range [][2]bool{
{false, false},
{true, false},
{false, true},
{true, true},
} {
b2 := NewBit(id, s[0])
b3 := NewBit(id, s[1])
b4 := NewBit(id, s[1]) // same as b3
c2 := b2.StageCommit()
c3 := b3.StageCommit()
c4 := b4.StageCommit()
r2, p2 := b2.RevealStage2(lost, b1, c1.X, c2.X, c3.X)
if !b2.Commitment.VerifyStage2(c1, c2, r1, r2, p2) {
t.Fatalf("failed to verify b2: %t b3: %t bc2/b1", s[0], s[1])
}
r3, p3 := b3.RevealStage2(lost, b1, c1.X, c2.X, c3.X)
if !b3.Commitment.VerifyStage2(c1, c3, r1, r3, p3) {
t.Fatalf("failed to verify b1: %t b3: %t bc3/b1", s[0], s[1])
}
r4, p4 := b4.RevealStage2(lost, b1, c1.X, c2.X, c3.X, c4.X)
if !b4.Commitment.VerifyStage2(c1, c4, r1, r4, p4) {
t.Fatalf("failed to verify b1: %t b4: %t bc4/b1", s[0], s[1])
}
}
}
}
func uint2bits(bid int) [4]*Bit {
id := Curve.RandomScalar()
return [4]*Bit{
NewBit(id, (bid>>3)&1 != 0),
NewBit(id, (bid>>2)&1 != 0),
NewBit(id, (bid>>1)&1 != 0),
NewBit(id, (bid>>0)&1 != 0),
}
}
var Id = Curve.Identity()
func TestStage2Complex(t *testing.T) {
bid1 := 0b0101
bid2 := 0b0010
t.Logf("testing bid1: %04b vs. bid2: %04b", bid1, bid2)
bits1 := uint2bits(bid1)
bits2 := uint2bits(bid2)
lost1 := false
lost2 := false
if len(bits1) != len(bits2) || len(bits1) != 4 {
t.Fatalf("oops")
}
instage1 := true
junction := -1
result := 0
for c := 0; c < len(bits1); c++ {
b1 := bits1[c]
b2 := bits2[c]
c1 := b1.StageCommit()
c2 := b2.StageCommit()
if instage1 {
t.Logf("Testing bit b1[%d] = %t vs b2[%d] = %t", c, b1.IsSet(), c, b2.IsSet())
r1, p1 := b1.RevealStage1(c1.X, c2.X)
r2, p2 := b2.RevealStage1(c1.X, c2.X)
if !b1.Commitment.VerifyStage1(c1, r1, p1) {
t.Fatalf("b1 commitment failed to verify in stage1")
}
if !b2.Commitment.VerifyStage1(c2, r2, p2) {
t.Fatalf("b2 commitment failed to verify in stage1")
}
Z := Curve.Product(r1.Z, r2.Z)
if !Id.Equal(Z) {
t.Logf("Aha! Z[%d] != Id, switch to stage2", c)
junction = c
instage1 = false
if !lost1 && !b1.IsSet() {
t.Logf("setting lost1 to true")
lost1 = true
}
if !lost2 && !b2.IsSet() {
t.Logf("setting lost2 to true")
lost2 = true
}
result |= 1 << (3 - c)
} else {
t.Logf("Z[%d] == Id, staying in stage1", c)
}
} else {
t.Logf("Testing bit b1[%d]∧lost1 = %t vs b2[%d]∧lost2 = %t", c, b1.IsSet() && !lost1, c, b2.IsSet() && !lost2)
bj1 := bits1[junction]
bj2 := bits2[junction]
r1, p1 := b1.RevealStage2(lost1, bj1, c1.X, c2.X)
r2, p2 := b2.RevealStage2(lost2, bj2, c1.X, c2.X)
if !b1.Commitment.VerifyStage2(bj1.StageCommitment, c1, bj1.StageReveal, r1, p1) {
t.Fatalf("b1 commitment failed to verify in stage1")
}
if !b2.Commitment.VerifyStage2(bj2.StageCommitment, c2, bj2.StageReveal, r2, p2) {
t.Fatalf("b2 commitment failed to verify in stage1")
}
Z := Curve.Product(r1.Z, r2.Z)
if !Id.Equal(Z) {
t.Logf("Aha! Z[%d] != Id, new junction!", c)
junction = c
if !lost1 && !b1.IsSet() {
t.Logf("setting lost1 to true")
lost1 = true
}
if !lost2 && !b2.IsSet() {
t.Logf("setting lost2 to true")
lost2 = true
}
result |= 1 << (3 - c)
}
}
}
if result != bid1 {
t.Fatalf("wrong result: %04b", result)
}
}
func TestFromPaper(t *testing.T) {
bid1 := 0b01010
bid2 := 0b01001
bid3 := 0b00111
t.Logf("testing\n\tbits1: %04b\n\tbits2: %04b\n\tbits3: %04b", bid1, bid2, bid3)
}
|
