Java crypto - Illegal key size or default parameters

Posted on 2014-02-19
Last Modified: 2014-02-23
Hey guys,

I'm running into some trouble loading a key into a cipher to encrypt some strings.  Below is the line of code that's causing an issue.

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);

where secretKey contains 256 bytes.

I'm getting a Illegal key size or default parameters.

I've scoured the internet and have come to believe this is an environment issue - I'm assuming I need to install JCE (Java Cryptography Extensions), but am running out of luck getting anything to work (most of the better documentation are around 8 years old).

I'll start off by saying I have Eclipse Standard/SDK installed, Version Kepler Service Release 1.  Are there any set up gurus out there that could assist me in resolving this issue?
Question by:larrysy
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Accepted Solution

CEHJ earned 500 total points
ID: 39870739
I'm assuming I need to install JCE (Java Cryptography Extensions)
That's a possibility. Did you?
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Expert Comment

ID: 39871016
>where secretKey contains 256 bytes.


Think 128 might be the limit.
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Expert Comment

ID: 39871137
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Author Comment

ID: 39881029
Turns out I had pulled the wrong version of JCE.
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Expert Comment

ID: 39881034
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Expert Comment

ID: 39881035
So the limit was 128-bit, correct?

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