Re: [FreeBSD-Announce] HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-11 Thread Christian Weisgerber 
On 2016-08-08, Devin Teske  wrote:

> Which would you use?

Ed25519.

> Or perhaps RSA? (as des@ recommends)

RSA if you need compatibility with servers or other clients that
don't know Ed25519.  That's why ssh-keygen, alas, still defaults
to RSA.

-- 
Christian "naddy" Weisgerber  na...@mips.inka.de
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Re: [FreeBSD-Announce] HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-08 Thread Devin Teske 

> On Aug 8, 2016, at 12:39 PM, Bernard Spil  wrote:
> 
> Hi Devin,
> 
> This resource documents the choices pretty well I think
> https://stribika.github.io/2015/01/04/secure-secure-shell.html 
> 
> Author has made some modifications up to Jan 2016
> https://github.com/stribika/stribika.github.io/commits/master/_posts/2015-01-04-secure-secure-shell.md
>  
> 
> 
> The short answer then is ed25519 or rsa4096, disable both dsa and ecdsa.
> 
> Even 6.5p1 shipped with 9.3 supports ed25519.
> 
> Cheers,
> 
> Bernard.
> 

Thanks for confirming, Bernard!
-- 
Cheers,
Devin


> On 2016-08-08 19:56, Devin Teske wrote:
>> Which would you use?
>> ECDSA?
>> https://en.wikipedia.org/wiki/Elliptic_curve_cryptography 
>> 
>> > >
>> "" In the wake of the exposure of Dual_EC_DRBG as "an NSA undercover
>> operation", cryptography experts have also expressed concern over the
>> security of the NIST recommended elliptic curves,[31]
>> > >
>> suggesting a return to encryption based on non-elliptic-curve groups.
>> ""
>> Or perhaps RSA? (as des@ recommends)
>> (not necessarily to Glen but anyone that wants to answer)
>> --
>> Devin
>>> On Aug 4, 2016, at 6:59 PM, Glen Barber  wrote:
>>> -BEGIN PGP SIGNED MESSAGE-
>>> Hash: SHA256
>>> This is a heads-up that OpenSSH keys are deprecated upstream by OpenSSH,
>>> and will be deprecated effective 11.0-RELEASE (and preceeding RCs).
>>> Please see r303716 for details on the relevant commit, but upstream no
>>> longer considers them secure.  Please replace DSA keys with ECDSA or RSA
>>> keys as soon as possible, otherwise there will be issues when upgrading
>>> from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
>>> 11.0-RELEASE build.
>>> Glen
>>> On behalf of:   re@ and secteam@
>>> -BEGIN PGP SIGNATURE-
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>>> -END PGP SIGNATURE-
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Re: [FreeBSD-Announce] HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-08 Thread Bernard Spil 

Hi Devin,

This resource documents the choices pretty well I think
https://stribika.github.io/2015/01/04/secure-secure-shell.html
Author has made some modifications up to Jan 2016
https://github.com/stribika/stribika.github.io/commits/master/_posts/2015-01-04-secure-secure-shell.md

The short answer then is ed25519 or rsa4096, disable both dsa and ecdsa.

Even 6.5p1 shipped with 9.3 supports ed25519.

Cheers,

Bernard.

On 2016-08-08 19:56, Devin Teske wrote:

Which would you use?

ECDSA?

https://en.wikipedia.org/wiki/Elliptic_curve_cryptography


"" In the wake of the exposure of Dual_EC_DRBG as "an NSA undercover
operation", cryptography experts have also expressed concern over the
security of the NIST recommended elliptic curves,[31]

suggesting a return to encryption based on non-elliptic-curve groups.
""

Or perhaps RSA? (as des@ recommends)

(not necessarily to Glen but anyone that wants to answer)
--
Devin



On Aug 4, 2016, at 6:59 PM, Glen Barber  wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

This is a heads-up that OpenSSH keys are deprecated upstream by 
OpenSSH,

and will be deprecated effective 11.0-RELEASE (and preceeding RCs).

Please see r303716 for details on the relevant commit, but upstream no
longer considers them secure.  Please replace DSA keys with ECDSA or 
RSA
keys as soon as possible, otherwise there will be issues when 
upgrading

from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
11.0-RELEASE build.

Glen
On behalf of:   re@ and secteam@

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Re: [FreeBSD-Announce] HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-08 Thread Conrad Meyer 
The OpenSSH defaults are intentionally sane.  RSA 2048 is anticipated
to be fine for the next 10 years.  It would not be a bad choice.  I'm
not aware of any reason not to use EC keys, and presumably the openssh
authors wouldn't ship them as an option if they knew of any reason to
believe they were compromised.

Best,
Conrad

On Mon, Aug 8, 2016 at 10:56 AM, Devin Teske  wrote:
> Which would you use?
>
> ECDSA?
>
> https://en.wikipedia.org/wiki/Elliptic_curve_cryptography 
> 
>
> "" In the wake of the exposure of Dual_EC_DRBG as "an NSA undercover 
> operation", cryptography experts have also expressed concern over the 
> security of the NIST recommended elliptic curves,[31] 
>  
> suggesting a return to encryption based on non-elliptic-curve groups. ""
>
> Or perhaps RSA? (as des@ recommends)
>
> (not necessarily to Glen but anyone that wants to answer)
> --
> Devin
>
>
>> On Aug 4, 2016, at 6:59 PM, Glen Barber  wrote:
>>
>> -BEGIN PGP SIGNED MESSAGE-
>> Hash: SHA256
>>
>> This is a heads-up that OpenSSH keys are deprecated upstream by OpenSSH,
>> and will be deprecated effective 11.0-RELEASE (and preceeding RCs).
>>
>> Please see r303716 for details on the relevant commit, but upstream no
>> longer considers them secure.  Please replace DSA keys with ECDSA or RSA
>> keys as soon as possible, otherwise there will be issues when upgrading
>> from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
>> 11.0-RELEASE build.
>>
>> Glen
>> On behalf of: re@ and secteam@
>>
>> -BEGIN PGP SIGNATURE-
>> Version: GnuPG v2
>>
>> iQIcBAEBCAAGBQJXo/L2AAoJEAMUWKVHj+KTG3sP/3j5PBVMBlYVVR+M4PUoRJjb
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>> =LLtP
>> -END PGP SIGNATURE-
>> ___
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Re: [FreeBSD-Announce] HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-08 Thread Devin Teske 
Which would you use?

ECDSA?

https://en.wikipedia.org/wiki/Elliptic_curve_cryptography 


"" In the wake of the exposure of Dual_EC_DRBG as "an NSA undercover 
operation", cryptography experts have also expressed concern over the security 
of the NIST recommended elliptic curves,[31] 
 
suggesting a return to encryption based on non-elliptic-curve groups. ""

Or perhaps RSA? (as des@ recommends)

(not necessarily to Glen but anyone that wants to answer)
-- 
Devin


> On Aug 4, 2016, at 6:59 PM, Glen Barber  wrote:
> 
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA256
> 
> This is a heads-up that OpenSSH keys are deprecated upstream by OpenSSH,
> and will be deprecated effective 11.0-RELEASE (and preceeding RCs).
> 
> Please see r303716 for details on the relevant commit, but upstream no
> longer considers them secure.  Please replace DSA keys with ECDSA or RSA
> keys as soon as possible, otherwise there will be issues when upgrading
> from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
> 11.0-RELEASE build.
> 
> Glen
> On behalf of: re@ and secteam@
> 
> -BEGIN PGP SIGNATURE-
> Version: GnuPG v2
> 
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> =LLtP
> -END PGP SIGNATURE-
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Re: HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-04 Thread Glen Barber 
On Fri, Aug 05, 2016 at 01:59:18AM +, Glen Barber wrote:
> This is a heads-up that OpenSSH keys are deprecated upstream by OpenSSH,
> and will be deprecated effective 11.0-RELEASE (and preceeding RCs).
> 

Stupid editor mistake.  OpenSSH DSA keys are deprecated upstream.  Sorry
for any confusion.

> Please see r303716 for details on the relevant commit, but upstream no
> longer considers them secure.  Please replace DSA keys with ECDSA or RSA
> keys as soon as possible, otherwise there will be issues when upgrading
> from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
> 11.0-RELEASE build.
> 

Glen
On behalf of:   re@ and secteam@



signature.asc
Description: PGP signature

HEADS-UP: OpenSSH DSA keys are deprecated in 12.0 and 11.0

2016-08-04 Thread Glen Barber 
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA256

This is a heads-up that OpenSSH keys are deprecated upstream by OpenSSH,
and will be deprecated effective 11.0-RELEASE (and preceeding RCs).

Please see r303716 for details on the relevant commit, but upstream no
longer considers them secure.  Please replace DSA keys with ECDSA or RSA
keys as soon as possible, otherwise there will be issues when upgrading
from 11.0-BETA4 to the subsequent 11.0 build, but most definitely the
11.0-RELEASE build.

Glen
On behalf of:   re@ and secteam@

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