RFR: 8301553: Support Password-Based Cryptography in SunPKCS11 [v6]

[Valerie Peng]

On Sat, 27 May 2023 06:24:36 GMT, Martin Balao <mbalao at openjdk.org> wrote:

>> We would like to propose an implementation for the [JDK-8301553: Support Password-Based Cryptography in SunPKCS11](https://bugs.openjdk.org/browse/JDK-8301553) enhancement requirement.
>> 
>> In addition to pursuing the requirement goals and guidelines of [JDK-8301553](https://bugs.openjdk.org/browse/JDK-8301553), we want to share the following implementation notes (grouped per altered file):
>> 
>>   * ```src/java.base/share/classes/com/sun/crypto/provider/HmacPKCS12PBECore.java``` (modified)
>>     * This file contains the ```SunJCE``` implementation for the [PKCS #12 General Method for Password Integrity](https://datatracker.ietf.org/doc/html/rfc7292#appendix-B) algorithms. It has been modified with the intent of consolidating all parameter checks in a common file (```src/java.base/share/classes/sun/security/util/PBEUtil.java```), that can be used both by ```SunJCE``` and ```SunPKCS11```. This change does not only serve the purpose of avoiding duplicated code but also ensuring alignment and compatibility between different implementations of the same algorithms. No changes have been made to parameter checks themselves.
>>     * The new ```PBEUtil::getPBAKeySpec``` method introduced for parameters checking takes both a ```Key``` and a ```AlgorithmParameterSpec``` instance (same as the ```HmacPKCS12PBECore::engineInit``` method), and returns a ```PBEKeySpec``` instance which consolidates all the data later required to proceed with the computation (password, salt and iteration count).
>> 
>>   * ```src/java.base/share/classes/com/sun/crypto/provider/PBES2Core.java``` (modified)
>>     * This file contains the ```SunJCE``` implementation for the [PKCS #5 Password-Based Encryption Scheme](https://datatracker.ietf.org/doc/html/rfc8018#section-6.2) algorithms, which use PBKD2 algorithms underneath for key derivation. In the same spirit than for the ```HmacPKCS12PBECore``` case, we decided to consolidate common code for parameters validation and default values in a single file (```src/java.base/share/classes/sun/security/util/PBEUtil.java```), that can serve both ```SunJCE``` and ```SunPKCS11``` and ensure compatibility. However, instead of a single static method at the implementation level (see ```PBEUtil::getPBAKeySpec```), we create an instance of an auxiliary class and invoke an instance method (```PBEUtil.PBES2Params::getPBEKeySpec```). The reason is to persist parameters data that has to be consistent between calls to ```PBES2Core::engineInit``` (in its multiple ...
>
> Martin Balao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8301553: Support Password-Based Cryptography in SunPKCS11 (iteration #4)
>   
>   Co-authored-by: Francisco Ferrari <fferrari at redhat.com>
>   Co-authored-by: Martin Balao <mbalao at redhat.com>

As someone who is familiar with the Cipher convention, it's clearer to apply the Cipher convention across the board, i.e. for Mac and SecretKeyFactory too. 
For example: For SecretKeyFactory.PBEWithHmacSHA1AndAES_128, use
`CKM_PKCS5_PBKD2 (required CKM_SHA_1_HMAC)` instead of `CKM_PKCS5_PBKD2 and CKM_SHA_1_HMAC`.

The listed mechanism is the one the impl maps to or based on. The required mechanism is for auxiliary functionalities. Putting the auxiliary one inside the required brackets seems clearer than combining them with the "and" word.

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PR Comment: https://git.openjdk.org/jdk/pull/12396#issuecomment-1572781909