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package ed25519_test
import (
"testing"
"github.com/cloudflare/circl/sign/ed25519"
)
type zeroReader struct{}
func (zeroReader) Read(buf []byte) (int, error) {
for i := range buf {
buf[i] = 0
}
return len(buf), nil
}
func TestMalleability(t *testing.T) {
// https://tools.ietf.org/html/rfc8032#section-5.1.7 adds an additional test
// that s be in [0, order). This prevents someone from adding a multiple of
// order to s and obtaining a second valid signature for the same message.
msg := []byte{0x54, 0x65, 0x73, 0x74}
sig := []byte{
0x7c, 0x38, 0xe0, 0x26, 0xf2, 0x9e, 0x14, 0xaa, 0xbd, 0x05, 0x9a,
0x0f, 0x2d, 0xb8, 0xb0, 0xcd, 0x78, 0x30, 0x40, 0x60, 0x9a, 0x8b,
0xe6, 0x84, 0xdb, 0x12, 0xf8, 0x2a, 0x27, 0x77, 0x4a, 0xb0, 0x67,
0x65, 0x4b, 0xce, 0x38, 0x32, 0xc2, 0xd7, 0x6f, 0x8f, 0x6f, 0x5d,
0xaf, 0xc0, 0x8d, 0x93, 0x39, 0xd4, 0xee, 0xf6, 0x76, 0x57, 0x33,
0x36, 0xa5, 0xc5, 0x1e, 0xb6, 0xf9, 0x46, 0xb3, 0x1d,
}
publicKey := []byte{
0x7d, 0x4d, 0x0e, 0x7f, 0x61, 0x53, 0xa6, 0x9b, 0x62, 0x42, 0xb5,
0x22, 0xab, 0xbe, 0xe6, 0x85, 0xfd, 0xa4, 0x42, 0x0f, 0x88, 0x34,
0xb1, 0x08, 0xc3, 0xbd, 0xae, 0x36, 0x9e, 0xf5, 0x49, 0xfa,
}
if ed25519.Verify(publicKey, msg, sig) {
t.Fatal("non-canonical signature accepted")
}
}
func BenchmarkKeyGeneration(b *testing.B) {
var zero zeroReader
for i := 0; i < b.N; i++ {
if _, _, err := ed25519.GenerateKey(zero); err != nil {
b.Fatal(err)
}
}
}
func BenchmarkNewKeyFromSeed(b *testing.B) {
seed := make([]byte, ed25519.SeedSize)
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_ = ed25519.NewKeyFromSeed(seed)
}
}
func BenchmarkSigning(b *testing.B) {
var zero zeroReader
_, priv, err := ed25519.GenerateKey(zero)
if err != nil {
b.Fatal(err)
}
message := []byte("Hello, world!")
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
ed25519.Sign(priv, message)
}
}
func BenchmarkVerification(b *testing.B) {
var zero zeroReader
pub, priv, err := ed25519.GenerateKey(zero)
if err != nil {
b.Fatal(err)
}
message := []byte("Hello, world!")
signature := ed25519.Sign(priv, message)
b.ResetTimer()
for i := 0; i < b.N; i++ {
ed25519.Verify(pub, message, signature)
}
}
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