On Thu, 25 Mar 2021 22:13:42 GMT, Martin Balao <mba...@openjdk.org> wrote:

>> Hi,
>> 
>> I'd like to propose a fix for JDK-8261355 [1].
>> 
>> The scheme used for holding data and padding while performing encryption 
>> operations is almost the same than the existing one for decryption. The only 
>> difference is that encryption does not require a block-sized buffer to be 
>> always held because there is no need, upon an update call, to determine 
>> which bytes are real output for the caller and which are padding -as it's 
>> required for decryption-. I added a couple of comments in implUpdate to 
>> explain this.
>> 
>> No regressions observed in jdk/sun/security/pkcs11.
>> 
>> Thanks,
>> Martin.-
>> 
>> --
>> [1] - https://bugs.openjdk.java.net/browse/JDK-8261355
>
> Martin Balao has updated the pull request with a new target base due to a 
> merge or a rebase. The pull request now contains three commits:
> 
>  - Avoid overriding buffered bytes with padding in the doFinal call.
>  - Only do encryption block-size buffering for NSS
>  - 8261355: No data buffering in SunPKCS11 Cipher encryption when the 
> underlying mechanism has no padding

src/jdk.crypto.cryptoki/share/classes/sun/security/pkcs11/P11Cipher.java line 
654:

> 652:             }
> 653:             // update 'padBuffer' if using our own padding impl.
> 654:             if (paddingObj != null) {

nit: if (paddingObj != null && newPadBufferLen > 0)?

-------------

PR: https://git.openjdk.java.net/jdk/pull/2510

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