func main() {
if len(os.Args) < 3 {
fmt.Println("Specify at least two parameters:")
fmt.Println(" 1) The base58 encoded bitcoin addres, that the signature was made with")
fmt.Println(" 2) The base64 encoded signature for the message...")
fmt.Println("If you specify a 3rd parameter - this will be assumed to be the message you want to verify")
fmt.Println("If you do not specify a 3rd parameter - the message will be read from stdin")
return
}
ad, er := btc.NewAddrFromString(os.Args[1])
if er != nil {
println("Address:", er.Error())
return
}
nv, btcsig, er := btc.ParseMessageSignature(os.Args[2])
if er != nil {
println("ParseMessageSignature:", er.Error())
return
}
var msg []byte
if len(os.Args) < 4 {
msg, _ = ioutil.ReadAll(os.Stdin)
} else {
msg = []byte(os.Args[3])
}
hash := make([]byte, 32)
btc.HashFromMessage(msg, hash)
compressed := false
if nv >= 31 {
//println("compressed key")
nv -= 4
compressed = true
}
pub := btcsig.RecoverPublicKey(hash[:], int(nv-27))
if pub != nil {
pk := pub.Bytes(compressed)
ok := btc.EcdsaVerify(pk, btcsig.Bytes(), hash)
if ok {
sa := btc.NewAddrFromPubkey(pk, ad.Version)
if ad.Hash160 != sa.Hash160 {
fmt.Println("BAD signature for", ad.String())
os.Exit(1)
} else {
fmt.Println("Good signature for", sa.String())
}
} else {
println("BAD signature")
os.Exit(1)
}
} else {
println("BAD, BAD, BAD signature")
os.Exit(1)
}
}
func main() {
key, _ := hex.DecodeString("040eaebcd1df2df853d66ce0e1b0fda07f67d1cabefde98514aad795b86a6ea66dbeb26b67d7a00e2447baeccc8a4cef7cd3cad67376ac1c5785aeebb4f6441c16")
sig, _ := hex.DecodeString("3045022100fe00e013c244062847045ae7eb73b03fca583e9aa5dbd030a8fd1c6dfcf11b1002207d0d04fed8fa1e93007468d5a9e134b0a7023b6d31db4e50942d43a250f4d07c01")
msg, _ := hex.DecodeString("3382219555ddbb5b00e0090f469e590ba1eae03c7f28ab937de330aa60294ed6")
sta := time.Now()
for i := 0; i < CNT; i++ {
if !btc.EcdsaVerify(key, sig, msg) {
println("Verify error")
return
}
}
sto := time.Now()
println((sto.UnixNano()-sta.UnixNano())/int64(CNT*1000), "us per ECDSA_Verify")
}
func multisig_sign() {
tx := raw_tx_from_file(*rawtx)
if tx == nil {
println("ERROR: Cannot decode the raw multisig transaction")
println("Always use -msign <addr> along with -raw multi2sign.txt")
return
}
ad2s, e := btc.NewAddrFromString(*multisign)
if e != nil {
println("BTC addr:", e.Error())
return
}
var privkey *ecdsa.PrivateKey
//var compr bool
for i := range publ_addrs {
if publ_addrs[i].Hash160 == ad2s.Hash160 {
privkey = new(ecdsa.PrivateKey)
pub, e := btc.NewPublicKey(publ_addrs[i].Pubkey)
if e != nil {
println("PubKey:", e.Error())
return
}
privkey.PublicKey = pub.PublicKey
privkey.D = new(big.Int).SetBytes(priv_keys[i][:])
//compr = compressed_key[i]
break
}
}
if privkey == nil {
println("You do not know a key for address", ad2s.String())
return
}
for i := range tx.TxIn {
ms, er := btc.NewMultiSigFromScript(tx.TxIn[i].ScriptSig)
if er != nil {
println("WARNING: Input", i, "- not multisig:", er.Error())
continue
}
hash := tx.SignatureHash(ms.P2SH(), i, btc.SIGHASH_ALL)
//fmt.Println("Input number", i, len(ms.Signatures), " - hash to sign:", hex.EncodeToString(hash))
btcsig := &btc.Signature{HashType: 0x01}
btcsig.R, btcsig.S, e = btc.EcdsaSign(privkey, hash)
if e != nil {
println(e.Error())
return
}
ms.Signatures = append(ms.Signatures, btcsig)
tx.TxIn[i].ScriptSig = ms.Bytes()
}
// Now re-order the signatures as they shall be:
for i := range tx.TxIn {
ms, er := btc.NewMultiSigFromScript(tx.TxIn[i].ScriptSig)
if er != nil {
//println(er.Error())
continue
}
hash := tx.SignatureHash(ms.P2SH(), i, btc.SIGHASH_ALL)
//fmt.Println("Input number", i, " - hash to sign:", hex.EncodeToString(hash))
//fmt.Println(" ... number of signatures:", len(ms.Signatures))
var sigs []*btc.Signature
for ki := range ms.PublicKeys {
//pk := btc.NewPublicKey(ms.PublicKeys[ki])
//fmt.Println(ki, hex.EncodeToString(ms.PublicKeys[ki]))
var sig *btc.Signature
for si := range ms.Signatures {
if btc.EcdsaVerify(ms.PublicKeys[ki], ms.Signatures[si].Bytes(), hash) {
//fmt.Println("Key number", ki, "has signature number", si)
sig = ms.Signatures[si]
break
}
}
if sig != nil {
sigs = append(sigs, sig)
} else if *verbose {
fmt.Println("WARNING: Key number", ki, "has no matching signature")
}
if !*allowextramsigns && uint(len(sigs)) >= ms.SigsNeeded {
break
}
}
if len(ms.Signatures) > len(sigs) {
fmt.Println("WARNING: Some signatures are obsolete and will be removed", len(ms.Signatures), "=>", len(sigs))
} else if len(ms.Signatures) < len(sigs) {
fmt.Println("It appears that same key is re-used.", len(sigs)-len(ms.Signatures), "more signatures were added")
}
ms.Signatures = sigs
tx.TxIn[i].ScriptSig = ms.Bytes()
}
write_tx_file(tx)
}
func main() {
var msg []byte
flag.Parse()
if *help || *addr == "" || *sign == "" {
flag.PrintDefaults()
return
}
ad, er := btc.NewAddrFromString(*addr)
if er != nil {
println("Address:", er.Error())
flag.PrintDefaults()
return
}
nv, btcsig, er := btc.ParseMessageSignature(*sign)
if er != nil {
println("ParseMessageSignature:", er.Error())
return
}
if *mess != "" {
msg = []byte(*mess)
} else if *mfil != "" {
msg, er = ioutil.ReadFile(*mfil)
if er != nil {
println(er.Error())
return
}
} else {
fmt.Println("Enter the message:")
msg, _ = ioutil.ReadAll(os.Stdin)
}
if *unix {
fmt.Println("Enforcing Unix text format")
msg = []byte(strings.Replace(string(msg), "\r", "", -1))
}
hash := make([]byte, 32)
btc.HashFromMessage(msg, hash)
compressed := false
if nv >= 31 {
//println("compressed key")
nv -= 4
compressed = true
}
pub := btcsig.RecoverPublicKey(hash[:], int(nv-27))
if pub != nil {
pk := pub.Bytes(compressed)
ok := btc.EcdsaVerify(pk, btcsig.Bytes(), hash)
if ok {
sa := btc.NewAddrFromPubkey(pk, ad.Version)
if ad.Hash160 != sa.Hash160 {
fmt.Println("BAD signature for", ad.String())
os.Exit(1)
} else {
fmt.Println("Good signature for", sa.String())
}
} else {
println("BAD signature")
os.Exit(1)
}
} else {
println("BAD, BAD, BAD signature")
os.Exit(1)
}
}