Kill off another ugly wart from the side of the passdb subsystem.

This time its the pdb_getsampwuid() function - which was only being used by the
SAMR rpc subsystem to gain a 'user session key'.  This 'user session key' is
actually generated at login time, and the other changes here simply move that
data around.

This also means that (when I check some details) we will be able to use the
user session key, even when we are not actually the DC, becouse its one of the
components of the info3 struct returned on logon.

Andrew Bartlett
(This used to be commit 799ac01fe08a338e4e94289f5d6767ebf905c1fa)

3 files changed, 16 insertions, 36 deletions

diff --git a/source3/rpc_server/srv_pipe.c b/source3/rpc_server/srv_pipe.c
index a38b86f826..2630729281 100644
--- a/source3/rpc_server/srv_pipe.c
+++ b/source3/rpc_server/srv_pipe.c
@@ -423,6 +423,8 @@ failed authentication on named pipe %s.\n", domain, user_name, wks, p->name ));
 		return False;
 	}
 	
+	memcpy(p->session_key, server_info->session_key, sizeof(p->session_key));
+
 	uid = pdb_get_uid(server_info->sam_account);
 	gid = pdb_get_gid(server_info->sam_account);
 
diff --git a/source3/rpc_server/srv_pipe_hnd.c b/source3/rpc_server/srv_pipe_hnd.c
index a98bcdc6bb..1b3d66bf49 100644
--- a/source3/rpc_server/srv_pipe_hnd.c
+++ b/source3/rpc_server/srv_pipe_hnd.c
@@ -252,9 +252,15 @@ static void *make_internal_rpc_pipe_p(char *pipe_name,
 			      connection_struct *conn, uint16 vuid)
 {
 	pipes_struct *p;
+	user_struct *vuser = get_valid_user_struct(vuid);
 
 	DEBUG(4,("Create pipe requested %s\n", pipe_name));
 
+	if (!vuser && vuid != UID_FIELD_INVALID) {
+		DEBUG(0,("ERROR! vuid %d did not map to a valid vuser struct!\n", vuid));
+		return NULL;
+	}
+
 	p = (pipes_struct *)malloc(sizeof(*p));
 
 	if (!p)
@@ -308,6 +314,11 @@ static void *make_internal_rpc_pipe_p(char *pipe_name,
 	p->pipe_user.uid = (uid_t)-1;
 	p->pipe_user.gid = (gid_t)-1;
 	
+	/* Store the session key */
+	if (vuser) {
+		memcpy(p->session_key, vuser->session_key, sizeof(p->session_key));
+	}
+
 	/*
 	 * Initialize the incoming RPC struct.
 	 */
diff --git a/source3/rpc_server/srv_samr_nt.c b/source3/rpc_server/srv_samr_nt.c
index 6ac71298fa..cf9be78f3d 100644
--- a/source3/rpc_server/srv_samr_nt.c
+++ b/source3/rpc_server/srv_samr_nt.c
@@ -2439,9 +2439,6 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 {
 	uint32 rid = 0x0;
 	DOM_SID sid;
-	struct current_user user;
-	SAM_ACCOUNT *sam_pass=NULL;
-	unsigned char sess_key[16];
 	POLICY_HND *pol = &q_u->pol;
 	uint16 switch_value = q_u->switch_value;
 	SAM_USERINFO_CTR *ctr = q_u->ctr;
@@ -2451,13 +2448,6 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 
 	r_u->status = NT_STATUS_OK;
 
-	if (p->ntlmssp_auth_validated) 	{
-		memcpy(&user, &p->pipe_user, sizeof(user));
-	} else 	{
-		extern struct current_user current_user;
-		memcpy(&user, &current_user, sizeof(user));
-	}
-
 	/* find the policy handle.  open a policy on it. */
 	if (!get_lsa_policy_samr_sid(p, pol, &sid))
 		return NT_STATUS_INVALID_HANDLE;
@@ -2471,29 +2461,6 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 		return NT_STATUS_INVALID_INFO_CLASS;
 	}
 
-
-	pdb_init_sam(&sam_pass);
-
-	/* 
-	 * We need the NT hash of the user who is changing the user's password.
-	 * This NT hash is used to generate a "user session key"
-	 * This "user session key" is in turn used to encrypt/decrypt the user's password.
-	 */
-
-	become_root();
-	ret = pdb_getsampwuid(sam_pass, user.uid);
-	unbecome_root();
-	if(ret == False) {
-		DEBUG(0,("_samr_set_userinfo: Unable to get smbpasswd entry for uid %u\n", (unsigned int)user.uid ));
-		pdb_free_sam(&sam_pass);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-		
-	memset(sess_key, '\0', 16);
-	mdfour(sess_key, pdb_get_nt_passwd(sam_pass), 16);
-
-	pdb_free_sam(&sam_pass);
-
 	/* ok!  user info levels (lots: see MSDEV help), off we go... */
 	switch (switch_value) {
 		case 0x12:
@@ -2502,7 +2469,7 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 			break;
 
 		case 24:
-			SamOEMhash(ctr->info.id24->pass, sess_key, 516);
+			SamOEMhash(ctr->info.id24->pass, p->session_key, 516);
 
 			dump_data(100, (char *)ctr->info.id24->pass, 516);
 
@@ -2520,7 +2487,7 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 			 * info level and W2K SP2 drops down to level 23... JRA.
 			 */
 
-			SamOEMhash(ctr->info.id25->pass, sess_key, 532);
+			SamOEMhash(ctr->info.id25->pass, p->session_key, 532);
 
 			dump_data(100, (char *)ctr->info.id25->pass, 532);
 
@@ -2531,7 +2498,7 @@ NTSTATUS _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SE
 			return NT_STATUS_INVALID_INFO_CLASS;
 
 		case 23:
-			SamOEMhash(ctr->info.id23->pass, sess_key, 516);
+			SamOEMhash(ctr->info.id23->pass, p->session_key, 516);
 
 			dump_data(100, (char *)ctr->info.id23->pass, 516);