Hi! Maybe the binary or build process should use a test vector to warn if that produces the wrong result, assuming the problem is the SHA code itself.
Regards, Ulrich 29.12.2022 00:39:44 Howard Chu <[email protected]>: > Ralf Hildebrandt wrote: >> Using slapd 2.5.13+dfsg-1ubuntu1 on ubuntu 22.10: >> ================================================= >> >> The password hashes are differing between what "slappasswd" and >> "openssl dgst" emit: >> >> $ slappasswd -s secret -h '{SHA256}' -o module-path=/usr/lib/ldap -o >> module-load=pw-sha2 >> {SHA256}WIrrpN3OjEVOUf6yrH1j+o+ODuUuNBo979Od4UXnu54= >> >> $ echo -n "secret" | openssl dgst -sha256 -binary | openssl enc -base64 >> K7gNU3sdo+OL0wNhqoVWhr3g6s1xYv72ol/pe/Unols= >> >> With SHA512 on the other hand, the hash generated by different programs is >> identical: >> >> $ slappasswd -s secret -h '{SHA512}' -o module-path=/usr/lib/ldap -o >> module-load=pw-sha2 >> {SHA512}vSsar3708Jvp9Szi2NWZZ02Bqp1qRCFpbcTZPdBhnWgs5WtNZKnvCXdhztmeD2cmW192CF5bDufKRpayrW/isg== >> >> $ echo -n "secret" | openssl dgst -sha512 -binary | openssl enc -base64 >> vSsar3708Jvp9Szi2NWZZ02Bqp1qRCFpbcTZPdBhnWgs5WtNZKnvCXdhztmeD2cm >> W192CF5bDufKRpayrW/isg== >> >> On an older box (ubuntu 20.04) with slapd 2.4.49+dfsg-2ubuntu1.9 we're >> seeing: >> ============================================================================== >> >> $ slappasswd -s secret -h '{SHA256}' -o module-path=/usr/lib/ldap -o >> module-load=pw-sha2 >> {SHA256}K7gNU3sdo+OL0wNhqoVWhr3g6s1xYv72ol/pe/Unols= >> $ echo -n "secret" | openssl dgst -sha256 -binary | openssl enc -base64 >> K7gNU3sdo+OL0wNhqoVWhr3g6s1xYv72ol/pe/Unols= >> >> >> So why is the SHA256 password hash generated by the 2.5.13 slappasswd >> command different from the hashes generated by the other programs/versions? >> > The source code for the pw-sha2 module hasn't changed since 2015 at least. > There's no difference between 2.4 and 2.5. > > The variable here is your OS and compiler versions. I get the same result as > you on ubuntu 22 with the > default compile options. If I compile the module with only "-g" and no > optimization, I get a different > result. So the compiler is doing something screwy. > > Note that the sha2.c used in the pw module comes from > https://aarongifford.com/computers/sha.html and is > unmodified. Probably you should report a bug to the gcc project. > > -- > -- Howard Chu > CTO, Symas Corp. http://www.symas.com > Director, Highland Sun http://highlandsun.com/hyc/ > Chief Architect, OpenLDAP http://www.openldap.org/project/
