On 16-06-05 20:36:35, KT Walrus wrote: > >> Maybe, Dovecot could just add support for BLF-CRYPT by using the open > >> source implementation of Blowfish hashing found in > >> https://github.com/php/php-src/tree/master/ext/standard > >> <https://github.com/php/php-src/tree/master/ext/standard>. The > >> implementation looks like a single function to generate the hash. I???m > >> not much of a programmer, but it would seem to me that these .c/.h files > >> could be added to Dovecot for doing BLF-CRYPT hashing. > >> > > It already does. As previously stated. > > It doesn???t for me. I???m building Dovecot from source (v2.2.24) in a Docker > container using Ubuntu 14.04. > > Does BLF-CRYPT work for you?
Yes, but I don't use ubuntu. > > Maybe I???m not building Dovecot correctly. I install libssl-dev and > libmysqlclient-dev and do: > > $ ./configure --prefix=/usr --sysconfdir=/etc --with-mysql > $ make > $ make install > > Am I missing some library/switch to enable BLF-CRYPT? Does your libc support it? $ man crypt || $ man bcrypt > > I just did a quick Google search, and it appears that Ubuntu 14.04 doesn???t > have support for BLF-CRYPT according to this issue: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349252 > <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1349252> > > Actually, now that I???ve researched this a bit more, it was a mistake for my > PHP app to make BLF-CRYPT password hashes since SHA512-CRYPT with a high > number of rounds should be just as good. If Ubuntu 16.04 didn't add support > for BLF-CRYPT, I guess I will have to implement a Checkpassword script for > Dovecot that might generate SHA512-CRYPT replacement hashes after > successfully checking against the BLF-CRYPT hashes. I???m no Dovecot expert, > but I think I can have multiple passdbs so the first passdb mysql lookup will > be set to fail if it finds a BLF-CRYPT hash so the Checkpassword script would > only be run once per failed mysql lookup. > Changing your php app will probably be the easiest solution. > Hopefully, I just missed some ./configure switch to enable BLF-CRYPT and > don???t have to deal with converting BLF-CRYPT to SHA512-CRYPT just for > Dovecot. > > Kevin > > > > On Jun 5, 2016, at 7:43 PM, Edgar Pettijohn <ed...@pettijohn-web.com> wrote: > > > > > > > > Sent from my iPhone > > > > On Jun 5, 2016, at 6:16 PM, KT Walrus <ke...@my.walr.us> wrote: > > > >>> I would love to know why your ubuntu 14.04 system doesn't support > >>> sha512-crypt. > >> > >> I just tried SHA512-CRYPT and it is supported on Ubuntu 14.04. I think I > >> was thinking about DBMail instead of Dovecot. > >> > >> I could really use support for BLF-CRYPT since my current password hashes > >> generated by PHP are using Blowfish encryption. > >> > >> Maybe, Dovecot could just add support for BLF-CRYPT by using the open > >> source implementation of Blowfish hashing found in > >> https://github.com/php/php-src/tree/master/ext/standard > >> <https://github.com/php/php-src/tree/master/ext/standard>. The > >> implementation looks like a single function to generate the hash. I???m > >> not much of a programmer, but it would seem to me that these .c/.h files > >> could be added to Dovecot for doing BLF-CRYPT hashing. > >> > > It already does. As previously stated. > > > > > >> This would mean all installations of Dovecot going forward would support > >> BLF-CRYPT regardless of whether the crypt libraries have Blowfish built in. > >> > >> Kevin > >> > >>> On Jun 4, 2016, at 9:53 AM, Patrick Domack <patric...@patrickdk.com> > >>> wrote: > >>> > >>> > >>> Quoting KT Walrus <ke...@my.walr.us <mailto:ke...@my.walr.us>>: > >>> > >>>> (I subscribed to a daily digest for this list and can???t figure out how > >>>> to reply to a reply.) > >>>> > >>>> Anyway, Aki Tuomi replied to my feature request saying: > >>>> > >>>>> We support in latest 2.2 release > >>>>> > >>>>> MD5 MD5-CRYPT SHA SHA1 SHA256 SHA512 SMD5 SSHA SSHA256 SSHA512 PLAIN > >>>>> CLEAR CLEARTEXT PLAIN-TRUNC CRAM-MD5 SCRAM-SHA-1 HMAC-MD5 DIGEST-MD5 > >>>>> PLAIN-MD4 PLAIN-MD5 LDAP-MD5 LANMAN NTLM OTP SKEY RPA CRYPT SHA256-CRYPT > >>>>> SHA512-CRYPT > >>>>> > >>>>> There is also blowfish support as BLF-CRYPT, but that requires that your > >>>>> system supports it. CRYPT supports whatever your crypt() supports. > >>>> > >>>> The reason I suggest building in fallback hash type support is that my > >>>> install of Dovecot on Ubuntu 14.04 didn???t support SHA512-CRYPT or > >>>> BLF-CRYPT. > >>>> > >>>> If Dovecot just included the PHP .c files to make sure it can process > >>>> Blowfish/SHA512 password hashes on all installs, it would greatly > >>>> simplify adding Dovecot as a service for my existing user accounts > >>>> (without forcing them to give their password for the site so I can > >>>> generate new hashes in a form that Dovecot supports). SHA256-CRYPT is > >>>> probably my best option for password hashing since it supports ROUNDS to > >>>> make hash generation slower. But, I would rather use BLF-CRYPT so I can > >>>> re-use my existing hashes for my user accounts. > >>> > >>> I would love to know why your ubuntu 14.04 system doesn't support > >>> sha512-crypt. > >>> > >>> My dovecot installs have only ever used sha512-crypt since 2008. Been > >>> using ubuntu since 7.04 with sha512-crypt, and my current systems running > >>> 14.04 and 16.04 both use sha512-crypt. > >>> > >>> The default password hash for system user accounts in ubuntu has been > >>> sha512-crypt for a very long time now. -- Edgar Pettijohn
