Encrypt in string characters only using cipher encryption in java

Question

I have a piece of code that works fine when encrypting, encryption works but i don't like the characters used in the encrypted string since it has to be passed in a URL, characters I would prefer are a-z, A-Z and 0-9, is this possible?

String key = enc_key;

// Create key and cipher
Key aesKey = new SecretKeySpec(key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance("AES");

// encrypt the text
cipher.init(Cipher.ENCRYPT_MODE, aesKey);
byte[] encrypted = cipher.doFinal(text.getBytes());
System.out.println(new String(encrypted));

the encrypted string looks like this ò'Ê>‡6?dövNÃ©÷s which is not URL friendly :-(, any suggestions please?

Qwerky · Accepted Answer · 2014-11-25 10:39:26Z

5

First use your normal AES enciphering and then base64 encode the result. At the other end, they have to base64 decode and then decipher. If you are on java 8, use built-in base64 codec. If on java 7 or older, use apache commons codec.

edited Nov 25, 2014 at 10:39

Qwerky

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answered Nov 25, 2014 at 10:10

Marko Živanović

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2 Comments

Lappies Over a year ago

base64 encoding is a standard encoding, meaning it can be decoded by anyone else, and since this will be used on via URL, so that's not safe, or am I wrong?

Marko Živanović Over a year ago

Base64 encoding is to be used after the encryption in order to encode encrypted bytes into the form that can be used safely in URLs. On the other side, that string will first be base64-decoded and then decrypted in order to get to plain-text.

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