Setting unicodePwd hashes directly
Stefan (metze) Metzmacher
metze at samba.org
Tue Aug 24 22:32:26 MDT 2010
Am 24.08.2010 18:01, schrieb Lukasz Zalewski:
> On 08/24/2010 04:44 PM, Matthias Dieter Wallnöfer wrote:
>> Hi Michael,
>> it's not encouraged to set NT hashes by bypassing the "password_hash"
>> module this way - better use metze's new control "bypass_password_hash".
>> I personally don't exactly know how to use/set it but he should be able
>> to explain it to you.
> I'm pretty sure its:
> $targetdir/bin/ldbadd -H $targetdir/private/sam.ldb --nosync --verbose
> --controls=relax:0 --controls=local_oid:220.127.116.11.4.1.718.104.22.168:0
> --controls=local_oid:22.214.171.124.4.1.7126.96.36.199:0 myldif.ldif
> Metze will be able to confirm if that is the case
Yes, but you need to be really, really careful when using that,
this should remain hidden magic...
>> Michael Wood wrote:
>>> When migrating users from e.g. Apple Open Directory one can get the
>>> arcfour-hmac-md5 hashes and shove them into Samba's directory. When I
>>> did this a couple of months ago I could just use
>>> ldbadd/ldbmodify/ldbedit to add the hashes and I believe I just used
>>> /usr/local/samba/private/sam.ldb as the path to connect to.
>>> Now when I try that, I get an error saying that I can't set unicodePwd
>>> # ldbedit -H /usr/local/samba/private/sam.ldb CN=Administrator
>>> failed to modify CN=Administrator,CN=Users,DC=example,DC=com -
>>> setup_io: it's not allowed to set the NT hash password directly'
>>> # 0 adds 0 modifies 0 deletes
>>> If I connect to sam.ldb.d/DC=EXAMPLE,DC=COM.ldb instead, then it seems
>>> to work:
>>> # ldbedit -H /usr/local/samba/private/sam.ldb.d/DC\=EXAMPLE\,DC\=COM.ldb
>>> CN=Administrator unicodePwd
>>> # 0 adds 1 modifies 0 deletes
>>> Is this an acceptable workaround? Or could it break things to use the
>>> second method? Is there a better way to set these hashes directly?
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