Function VerifySignature

crypto/secp256k1/secp256.go:122–130

VerifySignature checks that the given pubkey created signature over message. The signature should be in [R || S] format.

(pubkey, msg, signature []byte)

// VerifySignature checks that the given pubkey created signature over message.
// The signature should be in [R || S] format.
func VerifySignature(pubkey, msg, signature []byte) bool {
	if len(msg) != 32 || len(signature) != 64 || len(pubkey) == 0 {
		return false
	}
	sigdata := (*C.uchar)(unsafe.Pointer(&signature[0]))
	msgdata := (*C.uchar)(unsafe.Pointer(&msg[0]))
	keydata := (*C.uchar)(unsafe.Pointer(&pubkey[0]))
	return C.secp256k1_ext_ecdsa_verify(context, sigdata, msgdata, keydata, C.size_t(len(pubkey))) != 0
}

// DecompressPubkey parses a public key in the 33-byte compressed format.
// It returns non-nil coordinates if the public key is valid.