I have a concern about the performance. Not a big problem, but may be
nice to consider it.
Unlike CBC ciphers, GCM based ciphers need to update the IV for every
encryption/decryption operation. As means that the Cipher.init() is
required to call in every operation:
Key key = // the key used for this GCM cipher
for (every encrypt/decrypt operation) {
// init the cipher with new IV
cipher.init(...);
cipher.updateAAD(...);
cipher.doFinal(...);
}
I was wondering whether we can improve the performance a little by
bypass the key size checking in engineInit():
protected void engineInit(int opmode, Key key, ...) {
if (!(the key is the same as previous one)) {
checkKeySize(key, ...);
}
}
Xuelei
On 11/3/2012 7:54 AM, Valerie (Yu-Ching) Peng wrote:
> Brad or Max,
>
> Can either of you review my changes for the following RFE?
> 6996769: support AEAD ciphers
>
> This is the JCE part of changes for the EFP "Support AEAD CipherSuites".
>
> The webrev is at:
> http://cr.openjdk.java.net/~valeriep/6996769/webrev.00/
>
> I included IBM copyright in files where some code are adopted from their
> sample impl.
>
> Thanks,
> Valerie
