[strongSwan-dev] How to enable chacha20poly1305 support in Android app ?

[Andreas Steffen]

Hi John,

you need at least a Linux 4.2 kernel for chacha20poly1305 ESP
to be supported.

Best regards

Andreas

On 19.11.2015 03:54, John WW wrote:
> the left peer running on Linux localhost 4.1.5-x86_64
>
> On Thu, Nov 19, 2015 at 10:47 AM, John WW <wrxzzj at gmail.com> wrote:
>> Hi Tobias
>>
>>     Thanks for you reply.
>>     I have pull source from android-chapoly branch, and build it
>> successfully, But it's failed when I try to establish connection.
>> I have a Question, To enable chacha20 support,  have any system
>> requirement on left peer ?
>>
>> below is my strongswan log
>>
>> 02[KNL]  224: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>> 02[KNL]  240: 00 00 00 00 01 00 00 00 02 00 01 20 20 00 00 00  ...........  ...
>> 02[KNL]  256: 00 00 00 00 70 00 12 00 72 66 63 37 35 33 39 65  ....p...rfc7539e
>> 02[KNL]  272: 73 70 28 63 68 61 63 68 61 32 30 2C 70 6F 6C 79  sp(chacha20,poly
>> 02[KNL]  288: 31 33 30 35 29 00 00 00 00 00 00 00 00 00 00 00  1305)...........
>> 02[KNL]  304: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>> 02[KNL]  320: 00 00 00 00 00 00 00 00 20 01 00 00 80 00 00 00  ........ .......
>> 02[KNL]  336: 45 92 EA 40 EB 5E 05 46 6E 09 AF 24 AD 3E 46 5B  E.. at .^.Fn..$.>F[
>> 02[KNL]  352: F0 7C DF 87 EC 9A BC A5 20 BF 1F 9D E2 FC 76 15  .|...... .....v.
>> 02[KNL]  368: 4F 78 8D 5F 1C 00 04 00 02 00 11 94 B0 CE 00 00  Ox._............
>> 02[KNL]  384: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>> 02[KNL] received netlink error: Function not implemented (38)
>> 02[KNL] unable to add SAD entry with SPI 0a3c776e
>> 02[IKE] unable to install inbound and outbound IPsec SA (SAD) in kernel
>> 02[ENC] added payload of type NOTIFY to message
>> 02[IKE] failed to establish CHILD_SA, keeping IKE_SA
>> 02[KNL] deleting SAD entry with SPI c73657b2  (mark 0/0x00000000)
>>
>>
>> conn android
>>    keyexchange=ikev2
>>    left=%defaultroute
>>    leftauth=pubkey
>>    leftsubnet=0.0.0.0/0
>>    leftfirewall=yes
>>    leftcert=server.cert.pem
>>    leftid="C=CN, O=strongxyz, CN=x.x.x.x"
>>    right=%any
>>    rightid="C=CN, O=strongxyz, CN=android"
>>    rightsourceip=10.7.0.0/24
>>    rightcert=android.client.cert.pem
>>    ike=aes256ccm128-sha256-modp2048,aes256gcm128-sha256-modp2048,aes256gcm96-sha384-modp2048,aes256ccm96-sha384-modp2048,aes256-sha256-modp2048,aes128-sha256-modp2048,aes128-sha1-modp2048!
>>    esp=chacha20poly1305,aes128gcm128,aes256gcm128,aes256ccm128-sha256-modp2048,aes256ccm128-sha256-modp2048,aes256gcm128-sha256-modp2048,aes256gcm96-sha384-modp2048,aes256ccm96-sha512-modp2048,aes256-sha256,aes128-sha1-modp2048!
>>    mobike=yes
>>    compress=yes
>>    auto=add
>>
>> If I remove 'chacha20poly1305' in esp, all is right
>>
>> On Wed, Nov 18, 2015 at 7:00 PM, Tobias Brunner <tobias at strongswan.org> wrote:
>>> Hi John,
>>>
>>>>     How can I enable chacha20 in Android app ?
>>>> is't possible update Android.mk to add chacha20 plugin for support it ?
>>>
>>> Please have a look at the patches in the android-chapoly branch [1].
>>>
>>> Regards,
>>> Tobias
>>>
>>> [1]
>>> https://git.strongswan.org/?p=strongswan.git;a=shortlog;h=refs/heads/android-chapoly
>>>
>>
>>
>>
>> --
>> Thanks

======================================================================
Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Open Source VPN Solution!          www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
===========================================================[ITA-HSR]==

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