[15] RFR JDK-8246613: Choose the default SecureRandom algo based on registration ordering

[Weijun Wang]

I don't know who in this world would want to do that, but Prasad's concern is technically possible. I tried 'p.remove("SecureRandom.a")' in the new test, and new SecureRandom() fails with "java.security.NoSuchAlgorithmException: a SecureRandom not available".

And people can also remove one entry and add it back in order to move it to the end. One can even add new implementations this way.

Unfortunately there is no ConcurrentLinkedHashMap.

--Max

> On Jun 5, 2020, at 1:44 PM, Prasadrao Koppula <prasadarao.koppula at oracle.com> wrote:
> 
> Hi,
> 
> Looks good to me, one question
> 
> If first registered SecureRandom algo gets removed, getDefaultSecureRandomAlgorithm return stale data, a refresh required in remove?
> 
> Thanks,
> Prasad.K  
> 
>> -----Original Message-----
>> From: Valerie Peng
>> Sent: Friday, June 5, 2020 2:52 AM
>> To: security-dev at openjdk.java.net
>> Subject: Re: [15] RFR JDK-8246613: Choose the default SecureRandom algo
>> based on registration ordering
>> 
>> Hi, Sean,
>> 
>> Thanks for the review and feedback. Webrev updated:
>> http://cr.openjdk.java.net/~valeriep/8246613/webrev.01/
>> 
>> getTypeAndAlgorithm(...) was not static due to an instance variable used by
>> debugging output. I have removed it and made both method static.
>> 
>> I will wait for others' review comments also.
>> 
>> Thanks,
>> Valerie
>> On 6/4/2020 2:01 PM, Sean Mullan wrote:
>>> On 6/4/20 3:34 PM, Valerie Peng wrote:
>>>> Hi,
>>>> 
>>>> Could someone help reviewing this fix? This change keep tracks of the
>>>> first registered SecureRandom algorithm and returns it upon the
>>>> request of SecureRandom class.
>>> 
>>> This looks good to me. I would recommend that Max or someone else
>>> review it as well.
>>> 
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8246613
>>>> 
>>>> Webrev: http://cr.openjdk.java.net/~valeriep/8246613/webrev.00/
>>> 
>>> A couple of minor comments, feel free to fix or ignore.
>>> 
>>> * SecureRandom.java
>>> 
>>> 879             // For SUN provider, we use
>>> SunEntries.DEFF_SECURE_RANDOM_ALGO
>>> 
>>> Might as well fix the typo while you are in there: s/DEFF/DEF/
>>> 
>>> * Provider.java
>>> 
>>> 1156     private String parseSecureRandomPut(String name, String
>>> value) {
>>> 
>>> Could be static if you also make getTypeAndAlgorithm static, I think.
>>> 
>>> --Sean