Created
March 7, 2019 11:52
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Sample Java class for AES encryption
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import javax.crypto.Cipher; | |
import javax.crypto.spec.IvParameterSpec; | |
import javax.crypto.spec.SecretKeySpec; | |
import org.apache.commons.codec.binary.Base64; | |
public class Encryptor { | |
public static String encrypt(String key, String initVector, String value) { | |
try { | |
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8")); | |
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES"); | |
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING"); | |
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); | |
byte[] encrypted = cipher.doFinal(value.getBytes()); | |
System.out.println("encrypted string: " | |
+ Base64.encodeBase64String(encrypted)); | |
return Base64.encodeBase64String(encrypted); | |
} catch (Exception ex) { | |
ex.printStackTrace(); | |
} | |
return null; | |
} | |
public static String decrypt(String key, String initVector, String encrypted) { | |
try { | |
IvParameterSpec iv = new IvParameterSpec(initVector.getBytes("UTF-8")); | |
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES"); | |
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING"); | |
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); | |
byte[] original = cipher.doFinal(Base64.decodeBase64(encrypted)); | |
return new String(original); | |
} catch (Exception ex) { | |
ex.printStackTrace(); | |
} | |
return null; | |
} | |
public static void main(String[] args) { | |
String key = "cleopatradouglas"; // 128 bit key | |
String initVector = "RandomInitVector"; // 16 bytes IV | |
System.out.println(decrypt(key, initVector, | |
encrypt(key, initVector, "DONE!!"))); | |
} | |
} |
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