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more progress in verifying signature with ecrecover

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This commit is contained in:
Tim Williams 2018-07-05 13:50:08 -04:00
parent 0cbeb26f93
commit b09a39289a
1 changed files with 60 additions and 8 deletions
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68
shyftRingWalletConn/app.go
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@ -7,7 +7,8 @@ import (
"fmt"
"os"
"encoding/json"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/common/hexutil"
)
const (
@ -16,6 +17,12 @@ const (
CONN_TYPE = "tcp"
)
// This gives context to the signed message and prevents signing of transactions.
func signHash(data []byte) []byte {
msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(data), data)
return crypto.Keccak256([]byte(msg))
}
func main() {
l, err := net.Listen(CONN_TYPE, CONN_HOST+":"+CONN_PORT)
@ -57,17 +64,62 @@ func handleRequest(conn net.Conn) {
//Ecrecover takes 2 args, bytes[] and bytes[]
// we need to pass in the hash of the message as bytes
// and the bytes array of the signature
var msg = []byte(dat["msg"].(string))
var sig = []byte(dat["sig"].(string))
new_msg := crypto.Keccak256(msg)
var address, err = crypto.Ecrecover(new_msg, sig)
var msg = dat["msg"].(string)
var sig = dat["sig"].(string)
fmt.Println("the first sig is ")
fmt.Println(sig)
var new_byte_array, err2 = hexutil.Decode(msg)
var new_sig_byte_array, err3 = hexutil.Decode(sig)
if err2 != nil {
fmt.Println("the err2 is ")
fmt.Println(err2)
}
if err3 != nil {
fmt.Println("the err3 is ")
fmt.Println(err3)
}
var fizz = hexutil.Bytes(new_byte_array)
var buzz = hexutil.Bytes(new_sig_byte_array)
buzz[64] -= 27
fmt.Println("that bytes is")
fmt.Println(fizz)
//var bytes_msg = []byte(msg)
//var foo, err = hex.DecodeString(msg)
//fmt.Println("msg is ")
//fmt.Println(msg)
//fmt.Println("bytes_msg is ")
//fmt.Println(bytes_msg)
//var sig = dat["sig"].(string)
//fmt.Println("The sig is ")
//fmt.Println(sig)
//decoded, er := hex.DecodeString(sig)
//if er != nil {
// log.Fatal(err)
//}
new_msg := signHash(fizz)
fmt.Println("the new_msg is ")
fmt.Println(new_msg)
fmt.Println("the buzz is ")
fmt.Println(buzz)
var rpk, err = crypto.Ecrecover(new_msg, buzz)
if err != nil {
fmt.Println("The error is ")
fmt.Println(err)
}
s := string(address[:])
pubKey := crypto.ToECDSAPub(rpk)
recoveredAddr := crypto.PubkeyToAddress(*pubKey)
fmt.Println("the address is ")
fmt.Println(s)
fmt.Println(recoveredAddr)
fmt.Println(recoveredAddr.Hex())
//res, _ := new_add.MarshalText()
//fmt.Println(hexutil.Encode(address))
//s := string(address[:])
//
//fmt.Println(s)
//fmt.Println(address)
//fmt.Println("Message is ", msg)
}
@ -78,4 +130,4 @@ func handleRequest(conn net.Conn) {
conn.Write([]byte("Message received."))
// Close the connection when you're done with it.
conn.Close()
}
}