>> 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? 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? 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. 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.
