add code for triple des encrypting a payload

Author: j-shomo

encryption/des.go

@@ -0,0 +1,33 @@
+package encryption
+
+import (
+	"bytes"
+	"crypto/cipher"
+	"crypto/des"
+
+	"github.com/vulncheck-oss/go-exploit/output"
+)
+
+func PKCS5Padding(src []byte, blockSize int) []byte {
+	padding := blockSize - len(src)%blockSize
+	padtext := bytes.Repeat([]byte{byte(padding)}, padding)
+
+	return append(src, padtext...)
+}
+
+func TripleDesEncryption(key, iv, plainText []byte) ([]byte, bool) {
+	block, err := des.NewTripleDESCipher(key)
+	if err != nil {
+		output.PrintFrameworkError(err.Error())
+
+		return nil, false
+	}
+
+	blockSize := block.BlockSize()
+	origData := PKCS5Padding(plainText, blockSize)
+	blockMode := cipher.NewCBCEncrypter(block, iv)
+	cryted := make([]byte, len(origData))
+	blockMode.CryptBlocks(cryted, origData)
+
+	return cryted, true
+}