//recovers the public key from the signature
//recovery of pubkey means correct signature
func RecoverPubkey(msg []byte, sig []byte) []byte {
if len(sig) != 65 {
log.Panic()
}
var recid int = int(sig[64])
pubkey, ret := secp.RecoverPublicKey(
sig[0:64],
msg,
recid)
if ret != 1 {
log.Printf("RecoverPubkey: code %s", ret)
return nil
}
//var pubkey2 []byte = pubkey1.Bytes() //compressed
if pubkey == nil {
log.Panic("ERROR: impossible, pubkey nil and ret ==1")
}
if len(pubkey) != 33 {
log.Panic("pubkey length wrong")
}
return pubkey
//nonce1.SetBytes(nonce_seed)
}
//recovers the public key from the signature
//recovery of pubkey means correct signature
func _RecoverPubkey(msg []byte, sig []byte) []byte {
if len(sig) != 65 {
log.Panic()
}
var recid int = int(sig[64])
//var msg1 secp.Number
//var pubkey1 secp.XY
//msg1.SetBytes(msg)
//sig1.SetBytes(sig)
//var sig1 secp.Signature
//sig1.ParseBytes(sig[0:64])
//if ret != 1 {
//log.Panic("secp256k1, RecoverPubKey, recovery failed")
// log.Fatal("Parse Bytes Fail")
// return nil
//}
pubkey, ret := secp.RecoverPublicKey(
sig[0:64],
msg,
recid)
/*
ret := secp.RecoverPublicKey(
sig1.R.Bytes(),
sig1.S.Bytes(),
msg,
recid,
&pubkey1)
*/
if ret != 1 {
log.Printf("RecoverPubkey: code %s", ret)
return nil
}
//var pubkey2 []byte = pubkey1.Bytes() //compressed
if pubkey == nil {
log.Panic("ERROR: impossible, pubkey nil and ret ==1")
}
if len(pubkey) != 33 {
log.Panic("pubkey length wrong")
}
return pubkey
//nonce1.SetBytes(nonce_seed)
}