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POAvoiding line breaks in encrypted and encoded URL string
 

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  1. POAvoiding line breaks in encrypted and encoded URL string
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    <p>I am trying to implement a simple string encoder to obfuscates some parts of a URL string (to prevent them from getting mucked with by a user). I'm using code nearly identical to the sample in the <a href="http://docs.oracle.com/javase/6/docs/technotes/guides/security/crypto/CryptoSpec.html#SimpleEncrEx" rel="nofollow noreferrer">JCA guide</a>, except: </p> <ul> <li>using DES (assuming it's a little faster than AES, and requires a smaller key) and</li> <li>Base64 en/decoding the string to make sure it stays safe for a URL.</li> </ul> <p>For reasons I can't understand, the output string ends up with linebreaks, which I presume won't work. I can't figure out what's causing this. Suggestions on something similar that's easier or pointers to some other resources to read? I'm finding all the cryptography references a bit over my head (and overkill), but a simple ROT13 implementation won't work since I want to deal with a larger character set (and don't want to waste time implementing something likely to have issues with obscure characters i didn't think of).</p> <p>Sample input (no line break): </p> <pre><code>http://maps.google.com/maps?q=kansas&amp;hl=en&amp;sll=42.358431,-71.059773&amp;sspn=0.415552,0.718918&amp;hnear=Kansas&amp;t=m&amp;z=7 </code></pre> <p>Sample Output (line breaks as shown below): </p> <pre><code>GstikIiULcJSGEU2NWNTpyucSWUFENptYk4m5lD8RJl8l1CuspiuXiE9a07fUEAGM/tC7h0Vzus+ jAH6cT4Wtz2RUlBdGf8WtQxVDKZVOzKwi84eQh2kZT9T3KomlnPOu2owJ/2RAEvG+QuGem5UGw== </code></pre> <p>my encode snippet:</p> <pre><code>final Key key = new SecretKeySpec(seed.getBytes(), "DES"); final Cipher c = Cipher.getInstance("DES"); c.init(Cipher.ENCRYPT_MODE, key); final byte[] encVal = c.doFinal(s.getBytes()); return new BASE64Encoder().encode(encVal); </code></pre>
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    1. COdid you try to just revert your encoding op and see if it works ?
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    2. COwhere does that BASE64Encoder class come from?
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    3. CO@leonbloy I was importing sun.misc.BASE64Decoder, which I've found thanks to [this post](http://stackoverflow.com/questions/2267036/work-sun-misc-base64encoder-decoder-for-getting-byte) is not a good idea.
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