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  1. import javax.xml.bind.DatatypeConverter;
  2. import java.net.URLDecoder;
  3. import java.net.URLEncoder;
  4. import java.util.Date;
  5. import java.text.SimpleDateFormat;
  6.  
  7. import javax.crypto.spec.IvParameterSpec;
  8. import javax.crypto.spec.PBEKeySpec;
  9. import javax.crypto.spec.SecretKeySpec;
  10. import javax.crypto.Cipher;
  11. import javax.crypto.SecretKey;
  12. import javax.crypto.SecretKeyFactory;
  13. import java.security.Key;
  14.  
  15. public class EncryptString {
  16.   public static void main(String[] args) {
  17.     if(args.length == 4){
  18.         String cyphertext=EncryptString.encryptWithPassword(args[0],args[1],args[2],args[3]);
  19.         System.out.println("encryptWithPassword(password="+args[0]+",salt="+args[1]+",IV="+args[2]+",plaintext="+args[3]+") => "+cyphertext);
  20.         String plaintext=EncryptString.decryptWithPassword(args[0],args[1],args[2],cyphertext);
  21.         System.out.println("decryptWithPassword(password="+args[0]+",salt="+args[1]+",iv="+args[2]+",cyphertext="+cyphertext+") => ["+plaintext+"]");
  22.     }
  23.     else if(args.length == 3){
  24.         String cyphertext=EncryptString.encryptWithKey(args[0],args[1],args[2]);
  25.         System.out.println("encryptWithKey(key="+args[0]+",IV="+args[1]+",plaintext="+args[2]+") => "+cyphertext);
  26.         System.out.println("cyphertext="+DatatypeConverter.printHexBinary(DatatypeConverter.parseBase64Binary(cyphertext)));
  27.         String plaintext=EncryptString.decryptWithKey(args[0],args[1],cyphertext);
  28.         System.out.println("decryptWithKey(key="+args[0]+",iv="+args[1]+",cyphertext="+cyphertext+") => ["+plaintext+"]");
  29.     }
  30.     else{
  31.         System.err.println("usage: java EncryptString { key | password salt} IV plaintext");
  32.     }
  33.   }
  34.  
  35.  
  36.   public static String encryptWithPassword(String password, String salt, String iv, String plaintext){
  37.      String cipherText=null;
  38.      byte[] buffer = null;
  39.      try{
  40.          secretKeySpec=null;
  41.          PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(),DatatypeConverter.parseHexBinary(salt),1000,128);
  42.          SecretKeyFactory secretKeyFactory=SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
  43.          //SecretKeyFactory secretKeyFactory=SecretKeyFactory.getInstance("PBEWithMD5AndDES");
  44.          SecretKey secretKey=secretKeyFactory.generateSecret(pbeKeySpec);
  45.          SecretKeySpec secretKeySpec=new SecretKeySpec(secretKey.getEncoded(),"AES");
  46.          System.out.println("secretKeySpec.getEncoded()="+DatatypeConverter.printHexBinary(secretKeySpec.getEncoded())+"  secretKeySpec.getAlgorithm()="+secretKeySpec.getAlgorithm());
  47.          byte[] ivBytes = DatatypeConverter.parseHexBinary(iv);
  48.          IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
  49.          Cipher cipher = javax.crypto.Cipher.getInstance("AES/CBC/PKCS5Padding");
  50.          cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
  51.          buffer = cipher.doFinal(plaintext.getBytes());
  52.          System.out.println("plaintext.length()="+plaintext.length()+" buffer.length="+buffer.length);
  53.          cipherText=DatatypeConverter.printBase64Binary(buffer);
  54.      }
  55.      catch (Exception e){
  56.         System.err.println(e.getMessage());
  57.         e.printStackTrace();
  58.      }
  59.      return cipherText;
  60.   }
  61.  
  62.   public static String decryptWithPassword(String password, String salt, String iv, String cyphertext){
  63.      String plainText = null;
  64.      try{
  65.          byte[] buffer = DatatypeConverter.parseBase64Binary(cyphertext);
  66.          System.out.println("buffer.length="+buffer.length);
  67.          PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(),DatatypeConverter.parseHexBinary(salt),1000,128);
  68.          SecretKeyFactory secretKeyFactory=SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
  69.          //SecretKeyFactory secretKeyFactory=SecretKeyFactory.getInstance("PBEWithMD5AndDES");
  70.         SecretKey secretKey=secretKeyFactory.generateSecret(pbeKeySpec);
  71.          SecretKeySpec secretKeySpec=new SecretKeySpec(secretKey.getEncoded(),"AES");
  72.          byte[] ivBytes = DatatypeConverter.parseHexBinary(iv);
  73.          IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
  74.          Cipher cipher = javax.crypto.Cipher.getInstance("AES/CBC/PKCS5Padding");
  75.          cipher.init(Cipher.DECRYPT_MODE, secretKeySpec,ivSpec);
  76.          plainText = new String(cipher.doFinal(buffer));
  77.      }
  78.      catch (Exception e){
  79.         System.err.println(e.getMessage());
  80.         e.printStackTrace();
  81.      }
  82.      return plainText;
  83.   }
  84.  
  85.   public static String encryptWithKey(String key, String iv, String plaintext){
  86.      String cipherText=null;
  87.      byte[] buffer = null;
  88.      try{
  89.          SecretKeySpec aesKeySpec = new SecretKeySpec(DatatypeConverter.parseHexBinary(key),"AES");
  90.          byte[] ivBytes = DatatypeConverter.parseHexBinary(iv);
  91.          IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
  92.          Cipher cipher = javax.crypto.Cipher.getInstance("AES/CBC/PKCS5Padding");
  93.          cipher.init(Cipher.ENCRYPT_MODE, aesKeySpec, ivSpec);
  94.          buffer = cipher.doFinal(plaintext.getBytes());
  95.          System.out.println("plaintext.length()="+plaintext.length()+" buffer.length="+buffer.length);
  96.          cipherText=DatatypeConverter.printBase64Binary(buffer);
  97.      }
  98.      catch (Exception e){
  99.         System.err.println(e.getMessage());
  100.         e.printStackTrace();
  101.      }
  102.      return cipherText;
  103.   }
  104.  
  105.   public static String decryptWithKey(String key, String iv, String cyphertext){
  106.      String plainText = null;
  107.      try{
  108.          byte[] buffer = DatatypeConverter.parseBase64Binary(cyphertext);
  109.          System.out.println("buffer.length="+buffer.length);
  110.          SecretKeySpec aesKeySpec = new SecretKeySpec(DatatypeConverter.parseHexBinary(key),"AES");
  111.          byte[] ivBytes = DatatypeConverter.parseHexBinary(iv);
  112.          IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
  113.          Cipher cipher = javax.crypto.Cipher.getInstance("AES/CBC/PKCS5Padding");
  114.          cipher.init(Cipher.DECRYPT_MODE, aesKeySpec,ivSpec);
  115.          plainText = new String(cipher.doFinal(buffer));
  116.      }
  117.      catch (Exception e){
  118.         System.err.println(e.getMessage());
  119.         e.printStackTrace();
  120.      }
  121.      return plainText;
  122.   }
  123.  
  124. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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java EncryptString funkytown 412bb037430cbe5c 1F1E0A86C265631195F4B36469761306 "identifier=DSxi0iasfay485sf&email=hone@hone.be&choice_type=PARAM&value=14"
compilation info 
Main.java:15: error: class EncryptString is public, should be declared in a file named EncryptString.java
public class EncryptString {
       ^
Main.java:40: error: cannot find symbol
         secretKeySpec=null;
         ^
  symbol:   variable secretKeySpec
  location: class EncryptString
2 errors
stdout
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Standard output is empty
https://ideone.com/ZjJYT7
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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