Execute GO Language Online

package main

import (
    "crypto/hmac"
    "crypto/md5"
	"encoding/hex"
	"strconv"
	"fmt"
	"log"
)

func main() {

    var data [7]string
    data[0]="1.00"
    data[1]="RON"
    data[2]="123"
    data[3]="descriere comanda"
    data[4]="testaccount"
    data[5]="20180716170500"
    data[6]="somerandomstring12345689"
    
    fp_hash:=ephmac("00112233445566778899AABBCCDDEEFF",data)
    
    url:="https://secure.euplatesc.ro/tdsprocess/tranzactd.php?"
    url+="amount="+data[0]
    url+="&curr="+data[1]
    url+="&invoice_id="+data[2]
    url+="&order_desc="+data[3]
    url+="&merch_id="+data[4]
    url+="&timestamp="+data[5]
    url+="&nonce="+data[6]
    url+="&fp_hash="+fp_hash
    fmt.Println(url)
}

func ephmac (key string, data[7] string)(string){
    
    var strf string=""
    for i := 0; i < 7; i++ {
		if len(data[i])==0{
		    strf+="-"
		}else{
		     strf+=strconv.Itoa(len(data[i]))+data[i]
		}
		    
	}

    bin_key, err := hex.DecodeString(key)
    
    if err != nil {
		log.Fatal(err)
	}

    hmacmd5 := hmac.New(md5.New, bin_key)
    hmacmd5.Write([]byte(strf))
    res:=hmacmd5.Sum(nil)
    
    return hex.EncodeToString(res)
}