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Peter Koch

2023-Oct-14 21:43 UTC

[Samba] Compiling within Samba Source-Tree

Dear Samba-experts:

we migrated from Samba 3.6 to 4.18 and everything works well.

But there are two problems where I need some expert-help:

We are using a daemon that is running on our AD-server. It accepts
connections from remote machines and changes the passwords of
certain users. Calling system("smbpasswd") from within that daemon
would be too slow so the daemon calls local_password_change().
I therefor compile that daemon within the Samba source-tree.
Since its function is simular to smbpasswd I duplicated
source3/utils/smbpasswd.c into source3/utils/smbscardd.c,
replaced main() and removed all unneccessary routines.

I then duplicated the smbpasswd-rules in Makefile as well so
calling make would create the daemon.

Samba4 uses a new build system, so I added source3/utils/smbscardd.c
and replaced

bld.SAMBA3_BINARY('smbpasswd',
 ???????????????? source='smbpasswd.c',
 ???????????????? deps='''
 ???????????????? talloc
 ???????????????? smbconf
 ???????????????? pdb
 ???????????????? PASSWD_UTIL
 ???????????????? PASSCHANGE
 ???????????????? cmdline_contexts
 ???????????????? ''')

by

bld.SAMBA3_BINARY('smbpasswd',
 ???????????????? source='smbpasswd.c',
 ???????????????? deps='''
 ???????????????? talloc
 ???????????????? smbconf
 ???????????????? pdb
 ???????????????? PASSWD_UTIL
 ???????????????? PASSCHANGE
 ???????????????? cmdline_contexts
 ???????????????? ''')

bld.SAMBA3_BINARY('smbscardd',
 ???????????????? source='smbscardd.c',
 ???????????????? deps='''
 ???????????????? talloc
 ???????????????? smbconf
 ???????????????? pdb
 ???????????????? PASSWD_UTIL
 ???????????????? PASSCHANGE
 ???????????????? cmdline_contexts
 ???????????????? ''')

Unfortunately this does not work. smbscardd.c compiles, but
it won't link since it needs one more library, i.e. -lcrypto

I therefor did

PYTHONHASHSEED=1 WAF_MAKE=1 ./buildtools/bin/waf -v build

to see what's going on.

The last message is:

Build failed
 ?-> task in 'smbscardd' failed with exit status 1:
 ??????? {task 140216595759840: cprogram 
smbscardd.c.12.o,passchange.c.107.o,passwd_util.c.1.o,init_samr.c.141.o,cli_samr.c.126.o,init_lsa.c.140.o
-> smbscardd}
['/usr/bin/gcc', '-Wl,--as-needed',
'source3/utils/smbscardd.c.12.o',
'source3/libsmb/passchange.c.107.o',
'source3/utils/passwd_util.c.1.o',
'source3/rpc_client/init_samr.c.141.o', 
'source3/rpc_client/cli_samr.c.126.o', 
'source3/rpc_client/init_lsa.c.140.o', 
'-o/var/tmp/samba-4.19.0/bin/default/source3/utils/smbscardd', 
'-Wl,-rpath,/var/tmp/samba-4.19.0/bin/shared', 
'-Wl,-rpath,/var/tmp/samba-4.19.0/bin/shared/private',
'-Wl,-Bstatic',
'-Wl,-Bdynamic',
'-L/var/tmp/samba-4.19.0/bin/default/source4/cluster',
'-L/var/tmp/samba-4.19.0/bin/default/source4/lib/messaging', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/nbt', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/lib/socket', 
'-L/var/tmp/samba-4.19.0/bin/default/auth', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/libcli/ldap', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/dns', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/ldb', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/auth/kerberos', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/cldap', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/smb', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/addns', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/ldap', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/lib/events', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/tdb_wrap', 
'-L/var/tmp/samba-4.19.0/bin/default/third_party/heimdal_build', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/dsdb', 
'-L/var/tmp/samba-4.19.0/bin/default/libds/common', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/tdb', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/ldb-samba', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/registry', 
'-L/var/tmp/samba-4.19.0/bin/default/auth/gensec', 
'-L/var/tmp/samba-4.19.0/bin/default/source4/librpc', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/named_pipe_auth', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/param', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/auth', 
'-L/var/tmp/samba-4.19.0/bin/default/nsswitch/libwbclient', 
'-L/var/tmp/samba-4.19.0/bin/default/auth/credentials', 
'-L/var/tmp/samba-4.19.0/bin/default/lib', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/socket', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/messaging', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/security', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/replace', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/dbwrap', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/tevent', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/krb5_wrap', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/util', 
'-L/var/tmp/samba-4.19.0/bin/default/lib/talloc', 
'-L/var/tmp/samba-4.19.0/bin/default/librpc', 
'-L/var/tmp/samba-4.19.0/bin/default/source3', 
'-L/var/tmp/samba-4.19.0/bin/default/libcli/util',
'-L/usr/local/lib',
'-L/usr/local/lib', '-lsamba-errors',
'-lcmdline-contexts-samba4',
'-lmsrpc3-samba4', '-lsmbconf', '-lsamba-passdb', 
'-ldcerpc-samba-samba4', '-ltalloc-samba4',
'-lsamba-util',
'-lkrb5samba-samba4', '-lsamba-debug-samba4', '-lndr', 
'-lmessages-util-samba4', '-lsamba3-util-samba4',
'-ltevent-samba4',
'-ldbwrap-samba4', '-lsys-rw-samba4',
'-lserver-id-db-samba4',
'-lreplace-samba4', '-lsamba-security-samba4', 
'-ltalloc-report-printf-samba4', '-liov-buf-samba4', 
'-lsocket-blocking-samba4', '-lmessages-dgm-samba4', 
'-linterfaces-samba4', '-lsamba-sockets-samba4',
'-lCHARSET3-samba4',
'-ltevent-util', '-lsamba-cluster-support-samba4',
'-lutil-tdb-samba4',
'-ldcerpc-binding', '-llibsmb-samba4',
'-lsamba-credentials',
'-lgse-samba4', '-lndr-samba-samba4', '-lwbclient',
'-lcliauth-samba4',
'-lsamba-hostconfig', '-lnpa-tstream-samba4',
'-lndr-nbt',
'-lndr-standard', '-lndr-samba4', '-lgensec-samba4', 
'-lutil-reg-samba4', '-lsmbd-shim-samba4',
'-lsmbldaphelper-samba4',
'-lsamba-modules-samba4', '-lldbsamba-samba4',
'-ltdb-samba4',
'-lsecrets3-samba4', '-lsmbldap',
'-lflag-mapping-samba4',
'-lsamdb-common-samba4', '-lsamdb', '-lgenrand-samba4', 
'-lutil-setid-samba4', '-ltime-basic-samba4',
'-lasn1-samba4',
'-lkrb5-samba4', '-lgssapi-samba4', '-lcom-err-samba4', 
'-ltdb-wrap-samba4', '-lmsghdr-samba4',
'-levents-samba4',
'-lcli-ldap-common-samba4', '-lasn1util-samba4',
'-laddns-samba4',
'-lcli-smb-common-samba4', '-lcli-cldap-samba4',
'-lauthkrb5-samba4',
'-lldb-samba4', '-lstable-sort-samba4', '-lndr-krb5pac',
'-lserver-role-samba4', '-lroken-samba4',
'-lheimbase-samba4',
'-lhx509-samba4', '-lwind-samba4', '-lhcrypto-samba4', 
'-lclidns-samba4', '-lsmb-transport-samba4',
'-lcli-ldap-samba4',
'-lcommon-auth-samba4', '-lnetif-samba4',
'-lcli-nbt-samba4',
'-lMESSAGING-SEND-samba4', '-lcluster-samba4',
'-ljansson', '-lutil',
'-lresolv', '-licuuc', '-licudata', '-licui18n',
'-lldap', '-llber',
'-lz', '-ldl', '-lgnutls', '-lpthread',
'-pie', '-Wl,-z,relro,-z,now',
'-Wl,-no-undefined', '-Wl,--export-dynamic']

I tried hard to understand the waf build system and find out how
to add -lcrypto to the compile statement of smbscardd.

Since I did not find a way to do so, I manually compiled the daemon with:

cd bin/default
gcc -Wl,--as-needed \
 ??? source3/utils/smbscardd.c.12.o source3/libsmb/passchange.c.107.o 
source3/utils/passwd_util.c.1.o \
 ??? source3/rpc_client/init_samr.c.141.o 
source3/rpc_client/cli_samr.c.126.o source3/rpc_client/init_lsa.c.140.o \
 ??? -o source3/utils/smbscardd \
 ??? -Wl,-rpath,/var/tmp/samba-4.19.0/bin/shared \
 ??? -Wl,-rpath,/var/tmp/samba-4.19.0/bin/shared/private \
 ??? -Wl,-Bstatic -Wl,-Bdynamic \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/cluster \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/lib/messaging \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/nbt \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/lib/socket \
 ??? -L/var/tmp/samba-4.19.0/bin/default/auth \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/libcli/ldap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/dns \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/ldb \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/auth/kerberos \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/cldap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/smb \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/addns \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/ldap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/lib/events \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/tdb_wrap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/third_party/heimdal_build \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/dsdb \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libds/common \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/tdb \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/ldb-samba \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/registry \
 ??? -L/var/tmp/samba-4.19.0/bin/default/auth/gensec \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source4/librpc \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/named_pipe_auth \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/param \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/auth \
 ??? -L/var/tmp/samba-4.19.0/bin/default/nsswitch/libwbclient \
 ??? -L/var/tmp/samba-4.19.0/bin/default/auth/credentials \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/socket \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/messaging \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/security \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/replace \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/dbwrap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/tevent \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/krb5_wrap \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/util \
 ??? -L/var/tmp/samba-4.19.0/bin/default/lib/talloc \
 ??? -L/var/tmp/samba-4.19.0/bin/default/librpc \
 ??? -L/var/tmp/samba-4.19.0/bin/default/source3 \
 ??? -L/var/tmp/samba-4.19.0/bin/default/libcli/util \
 ??? -L/usr/local/lib \
 ??? -lsamba-errors -lcmdline-contexts-samba4 -lmsrpc3-samba4 -lsmbconf 
-lsamba-passdb \
 ??? -ldcerpc-samba-samba4 -ltalloc-samba4 -lsamba-util 
-lkrb5samba-samba4 -lsamba-debug-samba4 \
 ??? -lndr -lmessages-util-samba4 -lsamba3-util-samba4 -ltevent-samba4 
-ldbwrap-samba4 \
 ??? -lsys-rw-samba4 -lserver-id-db-samba4 -lreplace-samba4 
-lsamba-security-samba4 \
 ??? -ltalloc-report-printf-samba4 -liov-buf-samba4 
-lsocket-blocking-samba4 -lmessages-dgm-samba4 \
 ??? -linterfaces-samba4 -lsamba-sockets-samba4 -lCHARSET3-samba4 
-ltevent-util \
 ??? -lsamba-cluster-support-samba4 -lutil-tdb-samba4 -ldcerpc-binding 
-llibsmb-samba4 \
 ??? -lsamba-credentials -lgse-samba4 -lndr-samba-samba4 -lwbclient 
-lcliauth-samba4 \
 ??? -lsamba-hostconfig -lnpa-tstream-samba4 -lndr-nbt -lndr-standard 
-lndr-samba4 -lgensec-samba4 \
 ??? -lutil-reg-samba4 -lsmbd-shim-samba4 -lsmbldaphelper-samba4 
-lsamba-modules-samba4 \
 ??? -lldbsamba-samba4 -ltdb-samba4 -lsecrets3-samba4 -lsmbldap 
-lflag-mapping-samba4 \
 ??? -lsamdb-common-samba4 -lsamdb -lgenrand-samba4 -lutil-setid-samba4 
-ltime-basic-samba4 \
 ??? -lasn1-samba4 -lkrb5-samba4 -lgssapi-samba4 -lcom-err-samba4 
-ltdb-wrap-samba4 -lmsghdr-samba4 \
 ??? -levents-samba4 -lcli-ldap-common-samba4 -lasn1util-samba4 
-laddns-samba4 -lcli-smb-common-samba4 \
 ??? -lcli-cldap-samba4 -lauthkrb5-samba4 -lldb-samba4 
-lstable-sort-samba4 -lndr-krb5pac \
 ??? -lserver-role-samba4 -lroken-samba4 -lheimbase-samba4 
-lhx509-samba4 -lwind-samba4 \
 ??? -lhcrypto-samba4 -lclidns-samba4 -lsmb-transport-samba4 
-lcli-ldap-samba4 -lcommon-auth-samba4 \
 ??? -lnetif-samba4 -lcli-nbt-samba4 -lMESSAGING-SEND-samba4 
-lcluster-samba4 -ljansson -lutil \
 ??? -lresolv -licuuc -licudata -licui18n -lldap -llber -lz -ldl 
-lgnutls -lpthread \
 ??? -lcrypto \
 ??? -pie -Wl,-z,relro,-z,now -Wl,-no-undefined -Wl,--export-dynamic

That worked well, but here's my first question:

It must be possible to tell the build-system that smbscardd needs -lcrypto
Please let me know how.


There's another problem: My daemon does some sort of initilization
which I copied from smbpasswd.c

In short this initialization looks like:

configfile=get_dyn_CONFIGFILE();
lp_load_global(configfile);
secrets_init();
initialize_password_db(False, NULL);
get_global_sam_sid();
domain=lp_workgroup();

After this initialization the daemon accepts connections and
calls local_change_password()

Works very well but initialize_password_db() produces the
following warning:

no talloc stackframe at 
../../source3/passdb/machine_account_secrets.c:60, leaking memory

So here's my second question: How do I avoid this warning?

Peter

James Browning

2023-Oct-15 00:48 UTC

head link

[Samba] Compiling within Samba Source-Tree

Resending because my mailer love dropping HTML nuggets and the ML appears to
loathe them...

Based on knowledge of waf only from another project, I would suggest adding...

        use="CRYPTO",

In there somewhere. You also seem to be claiming to have a memory leak; you
should clean it up, probably with internal calls I wouldn't know of and/or
free().

(/useless)
-30-

Rowland Penny

2023-Oct-15 08:54 UTC

head link

[Samba] Compiling within Samba Source-Tree

On Sat, 14 Oct 2023 23:43:43 +0200
Peter Koch via samba <samba at lists.samba.org> wrote:
> Dear Samba-experts:
> 
> we migrated from Samba 3.6 to 4.18 and everything works well.
I remember this, didn't you have a problem with the SID ?
> 
> But there are two problems where I need some expert-help:
> 
> We are using a daemon that is running on our AD-server. It accepts
> connections from remote machines and changes the passwords of
> certain users.
What users ?
AD users or local users on a non domain joined computer ?
If they are AD users, then you probably shouldn't be using smbpasswd
and if they are local users on a non domain computer, then they
probably shouldn't be in AD or you should be using something like:

samba-tool user syncpasswords

Rowland

Ralph Boehme

2023-Oct-15 12:33 UTC

head link

[Samba] Compiling within Samba Source-Tree

On 10/14/23 23:43, Peter Koch via samba wrote:> It must be possible to tell the build-system that smbscardd needs -lcrypto
> Please let me know how.
./source3/wscript:    conf.CHECK_FUNCS_IN('DES_pcbc_encrypt',
'crypto')

As we already seem to check for libcrypto and store the dependency, you 
should be able to just add crypto to your list of deps.
> no talloc stackframe at 
> ../../source3/passdb/machine_account_secrets.c:60, leaking memory
> 
> So here's my second question: How do I avoid this warning?
I guess you're missing a

TALLOC_CTX *frame = talloc_stackframe();

in your initialisation.

-slow

--
Ralph Boehme, Samba Team         https://samba.org/
SerNet Samba Team Lead        https://sernet.de/en/
Worldwide Samba Support, Consulting and Development
SAMBA+ Samba packages           https://samba.plus/

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