48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
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package otpdecrypt
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import (
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"strings"
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"one-time-pad-utils/pad_definitions"
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)
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func OTPDecrypt(message string, key string) string {
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message = strings.Replace(message, " ", "", -1)
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messagesplit := strings.Split(message,"")
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var messagesplitint []int
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key = strings.Replace(key, " ", "", -1)
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keysplit := strings.Split(key,"")
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var keysplitint []int
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for _, char := range messagesplit {
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for n, c := range paddefinitions.NumToCharMap{
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if c == strings.ToUpper(char) {
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messagesplitint = append(messagesplitint, n)
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}
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}
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}
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for _, char := range keysplit {
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for n, c := range paddefinitions.NumToCharMap{
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if c == strings.ToUpper(char) {
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keysplitint = append(keysplitint, n)
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}
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}
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}
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if len(keysplitint) < len(messagesplitint) {
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return ("KEY TOO SHORT TO DECRYPT MESSAGE")
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}
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var decryptedmessage []string
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for pos, messagenum := range messagesplitint{
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decryptedmessage = append(decryptedmessage, paddefinitions.NumToCharMap[(((messagenum - keysplitint[pos]) % 35) + 35) % 35]) // crazy modulo for decryption
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}
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return (strings.Join(decryptedmessage, ""))
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}
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