diff options
| author | Alexander Bokovoy <ab@samba.org> | 2012-03-02 16:18:16 +0200 |
|---|---|---|
| committer | Andreas Schneider <asn@cryptomilk.org> | 2012-03-13 12:23:44 +0100 |
| commit | 7d4ed899831a853ec2eef8dcd82d74fdbf568f0e (patch) | |
| tree | 4ff03d559933f3b11ae4c96a3ad357ff4abcda89 /source3/auth/auth_util.c | |
| parent | e25f830f1df323607999179e00a5a39197bf02ea (diff) | |
| download | samba-7d4ed899831a853ec2eef8dcd82d74fdbf568f0e.tar.gz samba-7d4ed899831a853ec2eef8dcd82d74fdbf568f0e.tar.bz2 samba-7d4ed899831a853ec2eef8dcd82d74fdbf568f0e.zip | |
s3-rpc: Decrypt with the proper session key in CreateTrustedDomainEx2.
On LSA and SAMR pipes session_key is truncated to 16 byte when doing encryption/decryption.
However, this was not done for trusted domain-related modifying operations.
As result, Samba 4 client libraries do not work against Samba 3 while working
against Windows 2008 r2.
Solved this by introducing "session_extract_session_key()" function that allows to specify
intent of use of the key.
Signed-off-by: Andreas Schneider <asn@samba.org>
Autobuild-User: Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date: Tue Mar 13 12:23:44 CET 2012 on sn-devel-104
Diffstat (limited to 'source3/auth/auth_util.c')
| -rw-r--r-- | source3/auth/auth_util.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c index 21a8642751..4f6ebfa4a4 100644 --- a/source3/auth/auth_util.c +++ b/source3/auth/auth_util.c @@ -1618,3 +1618,31 @@ NTSTATUS do_map_to_guest_server_info(NTSTATUS status, return status; } + +/* + Extract session key from a session info and return it in a blob + if intent is KEY_USE_16BYTES, truncate it to 16 bytes + + See sections 3.2.4.15 and 3.3.4.2 of MS-SMB + Also see https://lists.samba.org/archive/cifs-protocol/2012-January/002265.html for details + + Note that returned session_key is referencing the original key, it is supposed to be + short-lived. If original session_info->session_key is gone, the reference will be broken. +*/ +NTSTATUS session_extract_session_key(const struct auth_session_info *session_info, DATA_BLOB *session_key, enum session_key_use_intent intent) +{ + + if (session_key == NULL || session_info == NULL) { + return NT_STATUS_INVALID_PARAMETER; + } + + if (session_info->session_key.length == 0) { + return NT_STATUS_NO_USER_SESSION_KEY; + } + + *session_key = session_info->session_key; + if (intent == KEY_USE_16BYTES) { + session_key->length = MIN(session_info->session_key.length, 16); + } + return NT_STATUS_OK; +} |