dice-one-time-pad/Go/otp_encrypt/otp_encrypt.go

package otpencrypt

import (
	"strings"
	"one-time-pad-utils/pad_definitions"
)

func OTPEncrypt(message string, key string) string {
	message = strings.Replace(message, " ", "", -1)
	messagesplit := strings.Split(message,"")
	var messagesplitint []int

	key = strings.Replace(key, " ", "", -1)
	keysplit := strings.Split(key,"")
	var keysplitint []int

	for _, char := range messagesplit {
		for n, c := range paddefinitions.NumToCharMap{
			if c == strings.ToUpper(char) {
				messagesplitint = append(messagesplitint, n)
			
			}
		}
	}
	
	for _, char := range keysplit {
		for n, c := range paddefinitions.NumToCharMap{
			if c == strings.ToUpper(char) {
				keysplitint = append(keysplitint, n)
			
			}
		}
	}

	if len(keysplitint) < len(messagesplitint) {
		return ("KEY TOO SHORT TO ENCRYPT MESSAGE")
	}

	var encryptedmessage []string

	for pos, messagenum := range messagesplitint{
		if pos != 0 && pos % 5 == 0 {
			encryptedmessage = append(encryptedmessage, " ")
		}
		encryptedmessage = append(encryptedmessage, paddefinitions.NumToCharMap[(messagenum + keysplitint[pos]) % 35])
	}

	return (strings.Join(encryptedmessage, ""))
}