Currently trying to figure out why my decryption method is not working. I used DES, CBC, and PKCS7Padding to encrypt my string. My current code outputs panic: crypto/cipher: input not full blocks during decryption.
Buddy it's work completely fine.
package main
import (
"bytes"
"crypto/des"
"crypto/cipher"
"fmt"
)
func DesEncryption(key, iv, plainText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockSize := block.BlockSize()
origData := PKCS5Padding(plainText, blockSize)
blockMode := cipher.NewCBCEncrypter(block, iv)
cryted := make([]byte, len(origData))
blockMode.CryptBlocks(cryted, origData)
return cryted, nil
}
func DesDecryption(key, iv, cipherText []byte) ([]byte, error) {
block, err := des.NewCipher(key)
if err != nil {
return nil, err
}
blockMode := cipher.NewCBCDecrypter(block, iv)
origData := make([]byte, len(cipherText))
blockMode.CryptBlocks(origData, cipherText)
origData = PKCS5UnPadding(origData)
return origData, nil
}
func PKCS5Padding(src []byte, blockSize int) []byte {
padding := blockSize - len(src)%blockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(src, padtext...)
}
func PKCS5UnPadding(src []byte) []byte {
length := len(src)
unpadding := int(src[length-1])
return src[:(length - unpadding)]
}
func main() {
originalText := "sysys"
fmt.Println(originalText)
mytext := []byte(originalText)
key := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
iv := []byte{0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC, 0xBC }
cryptoText,_ := DesEncryption(key, iv, mytext)
fmt.Println(string(cryptoText))
decryptedText,_ := DesDecryption(key, iv, cryptoText)
fmt.Println(string(decryptedText))
}