How to encrypt or decrypt with Rijndael and a block-size of 256 bits?

by

There is no support in any of the Sun JCE providers for anything other than Rijndael with the 128-bit blocksize: this is the AES algorithm. To get rijndael with the 256-bit blocksize you will have to go somewhere else. I suggest the Bouncycastle java library. The RijndaelEngine class has a constructor that accepts a block size in bits. Most people find the PaddedBufferedBlockCipher class to be more convenient when used with suitable padding, e.g.

PaddedBufferedBlockCipher c = new PaddedBufferedBlockCipher(new RijndaelEngine(256), new PKCS7Padding());

More Related Contents:

  1. Java 256-bit AES Password-Based Encryption
  2. Image encryption/decryption using AES256 symmetric block ciphers [closed]
  3. How to decrypt an encrypted AES-256 string from CryptoJS using Java? [closed]
  4. Initial bytes incorrect after Java AES/CBC decryption
  5. Encrypt Password in Configuration Files? [closed]
  6. Java default Crypto/AES behavior
  7. Given final block not properly padded
  8. IllegalBlockSizeException when trying to encrypt and decrypt a string with AES
  9. Java equivalent of an OpenSSL AES CBC encryption
  10. Java, How to implement a Shift Cipher (Caesar Cipher)
  11. Handling Java crypto exceptions
  12. Encrypt and decrypt with AES and Base64 encoding
  13. Why does my AES encryption throws an InvalidKeyException?
  14. How to decode a string encoded with openssl aes-128-cbc using java?
  15. Using SHA1 and RSA with java.security.Signature vs. MessageDigest and Cipher
  16. Better way to create AES keys than seeding SecureRandom
  17. Password Verification with PBKDF2 in Java
  18. Size of data after AES/CBC and AES/ECB encryption
  19. How to create a secure random AES key in Java?
  20. javax.crypto.BadPaddingException
  21. How can I list the available Cipher algorithms?
  22. CryptoJS AES encryption and Java AES decryption
  23. Java openssl encryption / decryption key generation [duplicate]
  24. java.security.NoSuchAlgorithmException:Cannot find any provider supporting AES/ECB/PKCS7PADDING
  25. How can I make my AES encryption identical between Java and Objective-C (iPhone)?
  26. Java AES 128 encrypting differently to openssl
  27. How are the IV and authentication tag handled for “AES/GCM/NoPadding”?
  28. AES/CBC/PKCS5Padding vs AES/CBC/PKCS7Padding with 256 key size performance java
  29. Breaking down RSA/ECB/OAEPWithSHA-256AndMGF1Padding
  30. What is the most appropriate way to store user settings in Android application

Leave a Comment