Review Request 115497: Replace SHA with PBKDF2-SHA512+Salt

[Michael Pyne]

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A couple of minor things but definitely looks a lot better. Hopefully the kwallet integration review can be done soon by someone knowledgeable with kwallet but I'd run the code myself at this point. ;)


kwalletd/backend/kwalletbackend.cc
<https://git.reviewboard.kde.org/r/115497/#comment34719>

    I didn't see specifics in libgcrypt's documentation but surely this memory needs to be freed (I'm assuming by the stdlib ::free()) after the QByteArray is constructed.



kwalletd/backend/kwalletbackend.cc
<https://git.reviewboard.kde.org/r/115497/#comment34720>

    Again, might want to add error-checking here. If the salt can't be saved for whatever reason then we don't want to destroy an existing old-style wallet by mistake.
    
    It looks like it would be as simple as returning an empty QByteArray if an error is detected.


- Michael Pyne


On Feb. 6, 2014, 3:28 p.m., Àlex Fiestas wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/115497/
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> 
> (Updated Feb. 6, 2014, 3:28 p.m.)
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> 
> Review request for KDE Runtime, Teo Mrnjavac and Valentin Rusu.
> 
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> Repository: kde-runtime
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> 
> Description
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> Uses the MINOR_VERSION (which until now it was 0) to upgrade the hash from SHA to PBKDF2-SHA512+salt.
> I would have loved to completely replace it once the wallet is ported to the new hashing but because
> of kwalletd code that is not possible without a bigger rewrite.
> 
> There are 2 reasons for this patch:
> 1-We avoid using our own implementation of SHA
> 2-We use a modern hashing technique
> 
> I'm cooking more patches to use the system user password to open the wallet, we want that password to be
> hashed using PBKDF2_SHA512 for security reasons.
> 
> 
> Diffs
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> 
>   CMakeLists.txt 275a6c7 
>   cmake/modules/FindLibGcrypt.cmake PRE-CREATION 
>   kwalletd/backend/CMakeLists.txt 5a5837c 
>   kwalletd/backend/backendpersisthandler.cpp bdef6ca 
>   kwalletd/backend/kwalletbackend.h 83ebf7f 
>   kwalletd/backend/kwalletbackend.cc e4d461c 
> 
> Diff: https://git.reviewboard.kde.org/r/115497/diff/
> 
> 
> Testing
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> 
> 
> Thanks,
> 
> Àlex Fiestas
> 
>

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