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testvectors_test.go
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testvectors_test.go
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package secp256k1
import (
"encoding/hex"
"testing"
)
// decodeHex decodes the passed hex string and returns the resulting bytes. It
// panics if an error occurs. This is only used in the tests as a helper since
// the only way it can fail is if there is an error in the test source code.
func decodeHex(hexStr string) []byte {
b, err := hex.DecodeString(hexStr)
if err != nil {
panic("invalid hex string in test source: err " + err.Error() +
", hex: " + hexStr)
}
return b
}
func TestSchnorrSignatureVerify(t *testing.T) {
// Test vectors taken from https://github.com/bitcoin/bips/blob/master/bip-0340/test-vectors.csv
tests := []struct {
secKey []byte
pubKey []byte
auxRand []byte
message []byte
signature []byte
valid bool
}{
{
decodeHex("0000000000000000000000000000000000000000000000000000000000000003"),
decodeHex("F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9"),
decodeHex("0000000000000000000000000000000000000000000000000000000000000000"),
decodeHex("0000000000000000000000000000000000000000000000000000000000000000"),
decodeHex("E907831F80848D1069A5371B402410364BDF1C5F8307B0084C55F1CE2DCA821525F66A4A85EA8B71E482A74F382D2CE5EBEEE8FDB2172F477DF4900D310536C0"),
true,
},
{
decodeHex("B7E151628AED2A6ABF7158809CF4F3C762E7160F38B4DA56A784D9045190CFEF"),
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
decodeHex("0000000000000000000000000000000000000000000000000000000000000001"),
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("6896BD60EEAE296DB48A229FF71DFE071BDE413E6D43F917DC8DCF8C78DE33418906D11AC976ABCCB20B091292BFF4EA897EFCB639EA871CFA95F6DE339E4B0A"),
true,
},
{
decodeHex("C90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B14E5C9"),
decodeHex("DD308AFEC5777E13121FA72B9CC1B7CC0139715309B086C960E18FD969774EB8"),
decodeHex("C87AA53824B4D7AE2EB035A2B5BBBCCC080E76CDC6D1692C4B0B62D798E6D906"),
decodeHex("7E2D58D8B3BCDF1ABADEC7829054F90DDA9805AAB56C77333024B9D0A508B75C"),
decodeHex("5831AAEED7B44BB74E5EAB94BA9D4294C49BCF2A60728D8B4C200F50DD313C1BAB745879A5AD954A72C45A91C3A51D3C7ADEA98D82F8481E0E1E03674A6F3FB7"),
true,
},
{ // test fails if msg is reduced modulo p or n
decodeHex("0B432B2677937381AEF05BB02A66ECD012773062CF3FA2549E44F58ED2401710"),
decodeHex("25D1DFF95105F5253C4022F628A996AD3A0D95FBF21D468A1B33F8C160D8F517"),
decodeHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"),
decodeHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"),
decodeHex("7EB0509757E246F19449885651611CB965ECC1A187DD51B64FDA1EDC9637D5EC97582B9CB13DB3933705B32BA982AF5AF25FD78881EBB32771FC5922EFC66EA3"),
true,
},
{
nil,
decodeHex("D69C3509BB99E412E68B0FE8544E72837DFA30746D8BE2AA65975F29D22DC7B9"),
nil,
decodeHex("4DF3C3F68FCC83B27E9D42C90431A72499F17875C81A599B566C9889B9696703"),
decodeHex("00000000000000000000003B78CE563F89A0ED9414F5AA28AD0D96D6795F9C6376AFB1548AF603B3EB45C9F8207DEE1060CB71C04E80F593060B07D28308D7F4"),
true,
},
{ //public key not on the curve
nil,
decodeHex("EEFDEA4CDB677750A420FEE807EACF21EB9898AE79B9768766E4FAA04A2D4A34"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"),
false,
},
{ // has_even_y(R) is false
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("FFF97BD5755EEEA420453A14355235D382F6472F8568A18B2F057A14602975563CC27944640AC607CD107AE10923D9EF7A73C643E166BE5EBEAFA34B1AC553E2"),
false,
},
{ // negated message
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("1FA62E331EDBC21C394792D2AB1100A7B432B013DF3F6FF4F99FCB33E0E1515F28890B3EDB6E7189B630448B515CE4F8622A954CFE545735AAEA5134FCCDB2BD"),
false,
},
{ // negated s value
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769961764B3AA9B2FFCB6EF947B6887A226E8D7C93E00C5ED0C1834FF0D0C2E6DA6"),
false,
},
{ // sG - eP is infinite. Test fails in single verification if has_even_y(inf) is defined as true and x(inf) as 0
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("0000000000000000000000000000000000000000000000000000000000000000123DDA8328AF9C23A94C1FEECFD123BA4FB73476F0D594DCB65C6425BD186051"),
false,
},
{ // sG - eP is infinite. Test fails in single verification if has_even_y(inf) is defined as true and x(inf) as 1
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("00000000000000000000000000000000000000000000000000000000000000017615FBAF5AE28864013C099742DEADB4DBA87F11AC6754F93780D5A1837CF197"),
false,
},
{ // sig[0:32] is not an X coordinate on the curve
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("4A298DACAE57395A15D0795DDBFD1DCB564DA82B0F269BC70A74F8220429BA1D69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"),
false,
},
{ // sig[0:32] is equal to field size
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F69E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"),
false,
},
{ // sig[32:64] is equal to curve order
nil,
decodeHex("DFF1D77F2A671C5F36183726DB2341BE58FEAE1DA2DECED843240F7B502BA659"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E177769FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"),
false,
},
{ // public key is not a valid X coordinate because it exceeds the field size
nil,
decodeHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30"),
nil,
decodeHex("243F6A8885A308D313198A2E03707344A4093822299F31D0082EFA98EC4E6C89"),
decodeHex("6CFF5C3BA86C69EA4B7376F31A9BCB4F74C1976089B2D9963DA2E5543E17776969E89B4C5564D00349106B8497785DD7D1D713A8AE82B32FA79D5F7FC407D39B"),
false,
},
}
msg32 := Hash{}
for i, test := range tests {
sig, err := DeserializeSchnorrSignatureFromSlice(test.signature)
if err != nil {
t.Fatal(err)
}
err = msg32.SetBytes(test.message)
if err != nil {
t.Fatal(err)
}
pubkey, err := DeserializeSchnorrPubKey(test.pubKey)
if err != nil && test.valid {
t.Fatalf("Schnorr test vector '%d': %s, pubkey: %x", i, err, test.pubKey)
}
if err == nil {
valid := pubkey.SchnorrVerify(&msg32, sig)
if valid != test.valid {
t.Errorf("Schnorr test vector '%d' expected verification: '%t', got: '%t'", i, valid, test.valid)
}
}
if test.secKey != nil {
var auxRandPtr *[32]byte
keypair, err := DeserializeSchnorrPrivateKeyFromSlice(test.secKey)
if err != nil {
t.Fatal(err)
}
if test.auxRand != nil {
auxRandPtr = &[32]byte{}
if len(auxRandPtr) != len(test.auxRand) {
t.Fatalf("Schnorr test vector '%d': invalid auxilary randomness length: %d != %d", i, len(auxRandPtr), len(test.auxRand))
}
copy(auxRandPtr[:], test.auxRand)
}
newSig, err := keypair.schnorrSignInternal(&msg32, auxRandPtr)
if err != nil {
t.Fatal(err)
}
if !newSig.IsEqual(sig) {
t.Errorf("Schnorr test vector '%d' expected sig: %s. got: %s", i, sig, newSig)
}
}
}
}