diff --git a/crypto/secp256r1/verifier.go b/crypto/secp256r1/verifier.go index a9e833cd65..ccc0786610 100644 --- a/crypto/secp256r1/verifier.go +++ b/crypto/secp256r1/verifier.go @@ -2,15 +2,9 @@ package secp256r1 import ( "crypto/ecdsa" - "crypto/elliptic" "math/big" ) -var ( - // Half of the order of the subgroup in the elliptic curve - secp256k1halfN = new(big.Int).Div(elliptic.P256().Params().N, big.NewInt(2)) -) - // Verifies the given signature (r, s) for the given hash and public key (x, y). func Verify(hash []byte, r, s, x, y *big.Int) bool { // Create the public key format @@ -21,17 +15,7 @@ func Verify(hash []byte, r, s, x, y *big.Int) bool { return false } - // Check the malleability issue - if checkMalleability(s) { - return false - } - // Verify the signature with the public key, // then return true if it's valid, false otherwise return ecdsa.Verify(publicKey, hash, r, s) } - -// Check the malleability issue -func checkMalleability(s *big.Int) bool { - return s.Cmp(secp256k1halfN) > 0 -}