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Author: CodiumAlgorithm

Caesar Cipher.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func cipher(text string, direction int) string {
+
+        shift, offset := rune(3), rune(26)
+	runes := []rune(text)
+
+        for index, char := range runes {
+		switch direction {
+		case -1: // encoding
+			if char >= 'a'+shift && char <= 'z' ||
+				char >= 'A'+shift && char <= 'Z' {
+				char = char - shift
+			} else if char >= 'a' && char < 'a'+shift ||
+				char >= 'A' && char < 'A'+shift {
+				char = char - shift + offset
+			}
+		case +1: // decoding
+			if char >= 'a' && char <= 'z'-shift ||
+				char >= 'A' && char <= 'Z'-shift {
+				char = char + shift
+			} else if char > 'z'-shift && char <= 'z' ||
+				char > 'Z'-shift && char <= 'Z' {
+				char = char + shift - offset
+			}
+		}
+		runes[index] = char
+	}
+	return string(runes)
+}
+
+func encode(text string) string { return cipher(text, -1) }
+func decode(text string) string { return cipher(text, +1) }
+
+func main() {
+	sec := os.Args[1]
+        fmt.Println("[+] Clear text: " + sec)
+	encoded := encode(sec)
+	fmt.Println("[+] Encoded: " + encoded)
+	decoded := decode(encoded)
+	fmt.Println("[+] Decoded: " + decoded)
+}