[strongSwan] AES-GCM for ESP

Randy Wyatt rwwyatt01 at gmail.com
Wed Jul 8 17:41:57 CEST 2015

pcrypt may be giving me errors because I am trying it on a small amazon
instance.  You must have at least 2 cores/CPU's.


On Wed, Jul 8, 2015 at 8:03 AM, Randy Wyatt <rwwyatt01 at gmail.com> wrote:

> tcrypt is simply to measure the performance of the encryption algorithm.
> It takes several arguments.  The first argument is the algorithm.  The
> second is the type.  The third is mode. The fourth is mask, and the fifth
> is time.
> The error message you are seeing is actually a little deceiving. There is
> not actually a problem with the kernel symbols. It solely means one of the
> arguments are wrong.  You can inspect tcrypt.c in the kernel sources to see
> the encryption tests.  From what I can tell,  your argument to alg is wrong.
> I think the wiki page needs to be updated.  I will wait for someone more
> experienced than I am to validate my findings.
> The tests start at line 952 in tcrypt.c.  I would specifically look at
> line 1229.  It still gives the resources temporarily unavailable as
> mentioned in the wiki.
> Regards,
> Randy
> On Tue, Jul 7, 2015 at 2:17 PM, Joshua Liebow-Feeser <joshlf13 at gmail.com>
> wrote:
>> Hi,
>> I'm trying to set up strongSwan to use AES-GCM as the encryption
>> algorithm for ESP. I'd like this to be parallelized, so I'm trying to use
>> pcrypt, but whenever I try to instantiate the proper kernel support, I get
>> errors:
>> $ sudo modprobe tcrypt alg="pcrypt(rfc4106(gcm(aes-aesni)))" type=3
>> FATAL: Error inserting tcrypt
>> (/lib/modules/3.13.0-55-generic/kernel/crypto/tcrypt.ko): Unknown symbol in
>> module, or unknown parameter (see dmesg)
>> $ dmesg | tail -n 1
>> [...] tcrypt: one or more tests failed!
>> Any idea what's going on here or how I could fix it? Thanks!
>> Cheers,
>> Josh
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Randy W. Wyatt
rwwyatt01 at gmail.com
Home: 858-309-5303
Cell: 858-598-4421
Fax: 858-408-7554
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