Re: [CentOS] Support for Argon2 for password hashing

2019-02-13 Thread Robert Moskowitz
I found that EPEL has argon2-20161029-2, but the dovecot 2.2.36 in C7 
does not use it.


If I were to compile dovecot 2.3, it comes with argon2 built in.

I don't want to get into the build business, I have other things 
demanding my time.  It would be nice to have argon2, but my server is 
small, and sha512 is a lot better than md5.




On 2/13/19 1:57 PM, Alice Wonder wrote:

The version of libsodium in EPEL supports argon2

For php you can build the libsodium extension. Also php 7.2+ builds 
that extension if you specify it build time using --with-sodium=shared 
switch.


For dovecot you have to build it against sodium which means building 
your own packages but it works. At least with modern upstream dovecot.


On 2/13/19 5:18 AM, Robert Moskowitz wrote:

Is there any information on adding support for Argon2?

I have been working on my new mailserver and this came up in moving 
from the default MD5 hash to more 'modern' hashes like SHA256 and 
SHA512. Then I was pointed to the work behind Argon2, and I see that 
it is moving through the IRTF cfrg workgroup:


draft-irtf-cfrg-argon2-04.txt

It is a 'purpose built' hash for passwords, with recommendations that 
new implementations use it.  Of course can't use it if crypt does not 
support it


thanks

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Re: [CentOS] Support for Argon2 for password hashing

2019-02-13 Thread Alice Wonder

The version of libsodium in EPEL supports argon2

For php you can build the libsodium extension. Also php 7.2+ builds that 
extension if you specify it build time using --with-sodium=shared switch.


For dovecot you have to build it against sodium which means building 
your own packages but it works. At least with modern upstream dovecot.


On 2/13/19 5:18 AM, Robert Moskowitz wrote:

Is there any information on adding support for Argon2?

I have been working on my new mailserver and this came up in moving from 
the default MD5 hash to more 'modern' hashes like SHA256 and SHA512. 
Then I was pointed to the work behind Argon2, and I see that it is 
moving through the IRTF cfrg workgroup:


draft-irtf-cfrg-argon2-04.txt

It is a 'purpose built' hash for passwords, with recommendations that 
new implementations use it.  Of course can't use it if crypt does not 
support it


thanks

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Re: [CentOS] Support for Argon2 for password hashing

2019-02-13 Thread Alexander Dalloz

Am 13.02.2019 um 14:18 schrieb Robert Moskowitz:

Is there any information on adding support for Argon2?


Did you check the RHEL 8 beta?

Alexander

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[CentOS] Support for Argon2 for password hashing

2019-02-13 Thread Robert Moskowitz

Is there any information on adding support for Argon2?

I have been working on my new mailserver and this came up in moving from 
the default MD5 hash to more 'modern' hashes like SHA256 and SHA512.  
Then I was pointed to the work behind Argon2, and I see that it is 
moving through the IRTF cfrg workgroup:


draft-irtf-cfrg-argon2-04.txt

It is a 'purpose built' hash for passwords, with recommendations that 
new implementations use it.  Of course can't use it if crypt does not 
support it


thanks

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