I tried IBM BlueCryptor which does what you said of using OpenSSL in Linux and 
CommonCryptor in Apple OS, but the problem that it took 132 seconds to run my 
unit test in Linux, while it took only 5 seconds in Mac OS. When I used your 
CommonCryptor version in Linux before it was taking almost same time like Mac 
OS. So I am switching back to use yours and not the BlueCryptor.

Could you elaborate more on the dangers of using your CommonCryptor version in 
Linux?

Thanks

> On Jun 14, 2016, at 12:52 AM, Niels Grewe <[email protected]> wrote:
> 
> 
> Hi Amr,
> 
>> Am 11.06.2016 um 07:46 schrieb Amr Aboelela <[email protected]>:
>> 
>> Hi Nik
>> Yes I should have used NSUTF8StringEncoding 
>> I just found the root of the problem though:
>> 
>> CommonCrypto_for_GNUstep/Source/AESedp$ vim AESAssembly.h 
>> 
>> Change:
>> 
>> // Select which implementation to use.
>> #if 1
>>        #define UseAESedp_IntelAssembly
>> #else
>>        #define UseAESedp_GeneralC
>> #endif
>> 
>> To:
>> 
>> // Select which implementation to use.
>> #if 0
>>        #define UseAESedp_IntelAssembly
>> #else
>>        #define UseAESedp_GeneralC
>> #endif
> 
> I guess that might work, but it’s just a workaround for the problem. The root 
> cause would probably lie within the architecture specific assembly code. 
> You’ve just switched to the slow C implementation of the AES algorithm to 
> make things work. That being said, the CommonCrypto port is seriously out of 
> date, and Apple has essentially prevented us from doing a new one (short of a 
> complete rewrite) because the newer CommonCrypto source dumps have a 
> dependency on CoreCrypto, which is only available under a seriously 
> restrictive evaluation license. So unless you are porting something with a 
> lot of CommonCrypto calls, you might just be better off #ifdefing stuff to 
> use openssl, gnutls or any other well maintained crypto library instead.
> 
> Cheers,
> 
> Niels 

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