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Groovy AES encryption decryption with Static Key and IV

Published 2 months ago by Chetan
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import javax.crypto.Cipher
import javax.crypto.spec.IvParameterSpec
import javax.crypto.spec.SecretKeySpec

String encryptionKey = "WhatIsSecureForYourPasswordEnter"//Paste your key here
Key key = new SecretKeySpec(encryptionKey.getBytes("UTF-8"), "AES")

String s1 = "a1eb9a28501f7bea" //Paster your IV here
byte[] bytes = s1.getBytes()
IvParameterSpec iv = new IvParameterSpec(bytes)

String text = 'Test123' //Paste your plain text here

def encrypt(String text, Key key, IvParameterSpec iv) { 
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
    cipher.init(Cipher.ENCRYPT_MODE, key, iv)
    String encryptedStr = cipher.doFinal(text.getBytes("UTF-8")).encodeBase64()
    //String encryptedStr = cipher.doFinal(text.getBytes("UTF-8")).encodeHex()
    return encryptedStr

def decrypt(String encryptedStr, Key key, IvParameterSpec iv) { 
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
    cipher.init(Cipher.DECRYPT_MODE, key, iv)
    //byte[] plainText = cipher.doFinal(Base64.getDecoder().decode(encryptedStr))
    byte[] plainText = cipher.doFinal(Base64.getDecoder().decode(encryptedStr))
    return plainText

encrypted = encrypt(text, key, iv)
println "Encrypted text : ${new String(encrypted)}"

decrypted = decrypt(encrypted, key, iv)
println "Decrypted text : ${new String(decrypted)}"