r6573: Start on my project to implement an NT4 compatible BDC in Samba4.

This brings in a compatability layer for Samba3 in Samba4 - where we
will start to define file formats and similar details.

The 'net samdump' command uses 'password server = ' for now, and
performs a similar task to Samba3's 'net rpc samsync'.

Andrew Bartlett
(This used to be commit 550f17f9924fe783917318753de7d1a388423908)

1 files changed, 225 insertions, 0 deletions

diff --git a/source4/libnet/libnet_vampire.c b/source4/libnet/libnet_vampire.c
new file mode 100644
index 0000000000..daf7bdfaed
--- /dev/null
+++ b/source4/libnet/libnet_vampire.c
@@ -0,0 +1,225 @@
+/* 
+   Unix SMB/CIFS implementation.
+   
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+#include "includes.h"
+#include "libnet/libnet.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "librpc/gen_ndr/ndr_samr.h"
+
+static BOOL vampire_samdump_handle_user(TALLOC_CTX *mem_ctx,
+					struct creds_CredentialState *creds,
+					struct netr_DELTA_ENUM *delta) 
+{
+	uint32_t rid = delta->delta_id_union.rid;
+	struct netr_DELTA_USER *user = delta->delta_union.user;
+	struct samr_Password lm_hash;
+	struct samr_Password nt_hash;
+	struct samr_Password *lm_hash_p = NULL;
+	struct samr_Password *nt_hash_p = NULL;
+	const char *username = user->account_name.string;
+	char *hex_lm_password;
+	char *hex_nt_password;
+
+	NTSTATUS nt_status;
+
+	if (user->lm_password_present) {
+		sam_rid_crypt(rid, user->lmpassword.hash, lm_hash.hash, 0);
+		lm_hash_p = &lm_hash;
+	}
+	if (user->nt_password_present) {
+		sam_rid_crypt(rid, user->ntpassword.hash, nt_hash.hash, 0);
+		nt_hash_p = &nt_hash;
+	}
+
+	if (user->user_private_info.SensitiveData) {
+		DATA_BLOB data;
+		struct netr_USER_KEYS keys;
+		data.data = user->user_private_info.SensitiveData;
+		data.length = user->user_private_info.DataLength;
+		creds_arcfour_crypt(creds, data.data, data.length);
+		nt_status = ndr_pull_struct_blob(&data, mem_ctx, &keys, (ndr_pull_flags_fn_t)ndr_pull_netr_USER_KEYS);
+		if (NT_STATUS_IS_OK(nt_status)) {
+			if (keys.keys.keys2.lmpassword.length == 16) {
+				sam_rid_crypt(rid, keys.keys.keys2.lmpassword.pwd.hash, lm_hash.hash, 0);
+				lm_hash_p = &lm_hash;
+			}
+			if (keys.keys.keys2.ntpassword.length == 16) {
+				sam_rid_crypt(rid, keys.keys.keys2.ntpassword.pwd.hash, nt_hash.hash, 0);
+				nt_hash_p = &nt_hash;
+			}
+		} else {
+			printf("Failed to parse Sensitive Data for %s:\n", username);
+			dump_data(10, data.data, data.length);
+			return False;
+		}
+	}
+
+	hex_lm_password = smbpasswd_sethexpwd(mem_ctx, lm_hash_p, user->acct_flags);
+	hex_nt_password = smbpasswd_sethexpwd(mem_ctx, nt_hash_p, user->acct_flags);
+
+	printf("%s:%d:%s:%s:%s:LCT-%08X\n", username,
+	       rid, hex_lm_password, hex_nt_password,
+	       smbpasswd_encode_acb_info(mem_ctx, user->acct_flags),
+	       (unsigned int)nt_time_to_unix(user->last_password_change));
+
+	return True;
+}
+
+
+
+static NTSTATUS libnet_SamDump_netlogon(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
+{
+	NTSTATUS nt_status;
+	TALLOC_CTX *loop_ctx, *delta_ctx;
+	struct creds_CredentialState *creds;
+	struct netr_DatabaseSync dbsync;
+	struct cli_credentials *machine_account;
+	struct dcerpc_binding *b;
+	struct dcerpc_pipe *p;
+
+	/* TODO: This is bogus */
+	const char **bindings = lp_passwordserver();
+	const char *binding;
+
+	if (bindings && bindings[0]) {
+		binding = bindings[0];
+	}
+
+	machine_account = cli_credentials_init(mem_ctx);
+	if (!machine_account) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	cli_credentials_set_conf(machine_account);
+	nt_status = cli_credentials_set_machine_account(machine_account);
+	
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		r->netlogon.error_string = talloc_strdup(mem_ctx, "Could not obtain machine account password - are we joined to the domain?");
+		return nt_status;
+	}
+	
+	if (cli_credentials_get_secure_channel_type(machine_account) != SEC_CHAN_BDC) {
+		r->netlogon.error_string
+			= talloc_asprintf(mem_ctx, 
+					  "Our join to domain %s is not as a BDC (%d), please rejoin as a BDC",
+					  cli_credentials_get_secure_channel_type(machine_account),
+					  cli_credentials_get_domain(machine_account));
+		return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
+	}
+
+	/* Connect to DC (take a binding string for now) */
+
+	nt_status = dcerpc_parse_binding(mem_ctx, binding, &b);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		r->netlogon.error_string = talloc_asprintf(mem_ctx, "Bad binding string %s\n", binding);
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	/* We like schannel */
+	b->flags &= ~DCERPC_AUTH_OPTIONS;
+	b->flags |= DCERPC_SCHANNEL | DCERPC_SEAL | DCERPC_SCHANNEL_128;
+
+	/* Setup schannel */
+	nt_status = dcerpc_pipe_connect_b(mem_ctx, &p, b, 
+					  DCERPC_NETLOGON_UUID,
+					  DCERPC_NETLOGON_VERSION,
+					  machine_account);
+
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	/* call domain logon */
+
+	nt_status = dcerpc_schannel_creds(p->conn->security_state.generic_state, mem_ctx, &creds);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return nt_status;
+	}
+
+	dbsync.in.logon_server = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p));
+	dbsync.in.computername = cli_credentials_get_workstation(machine_account);
+	dbsync.in.preferredmaximumlength = (uint32_t)-1;
+	ZERO_STRUCT(dbsync.in.return_authenticator);
+
+	dbsync.in.sync_context = 0;
+	dbsync.in.database_id = SAM_DATABASE_DOMAIN;
+
+	do {
+		int d;
+		loop_ctx = talloc_named(mem_ctx, 0, "DatabaseSync loop context");
+		creds_client_authenticator(creds, &dbsync.in.credential);
+		
+		nt_status = dcerpc_netr_DatabaseSync(p, loop_ctx, &dbsync);
+		if (!NT_STATUS_IS_OK(nt_status) &&
+		    !NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES)) {
+			printf("DatabaseSync - %s\n", nt_errstr(nt_status));
+			return nt_status;
+		}
+		
+		if (!creds_client_check(creds, &dbsync.out.return_authenticator.cred)) {
+			printf("Credential chaining failed\n");
+		}
+		
+		dbsync.in.sync_context = dbsync.out.sync_context;
+		
+		for (d=0; d < dbsync.out.delta_enum_array->num_deltas; d++) {
+			delta_ctx = talloc_named(loop_ctx, 0, "DatabaseSync delta context");
+			switch (dbsync.out.delta_enum_array->delta_enum[d].delta_type) {
+			case NETR_DELTA_USER:
+				if (!vampire_samdump_handle_user(delta_ctx, 
+								 creds,
+								 &dbsync.out.delta_enum_array->delta_enum[d])) {
+					return NT_STATUS_INVALID_PARAMETER;
+				}
+				break;
+			}
+			talloc_free(delta_ctx);
+		}
+		talloc_free(loop_ctx);
+	} while (NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES));
+	return NT_STATUS_OK;
+}
+
+NTSTATUS libnet_SamDump_generic(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
+{
+	NTSTATUS nt_status;
+	union libnet_SamDump r2;
+
+	r2.generic.level = LIBNET_SAMDUMP_NETLOGON;
+	r2.generic.error_string = NULL;
+	nt_status = libnet_SamDump(ctx, mem_ctx, &r2);
+	r->generic.error_string = r2.netlogon.error_string;
+
+	
+	return nt_status;
+}
+
+NTSTATUS libnet_SamDump(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
+{
+	switch (r->generic.level) {
+	case LIBNET_SAMDUMP_GENERIC:
+		return libnet_SamDump_generic(ctx, mem_ctx, r);
+	case LIBNET_SAMDUMP_NETLOGON:
+		return libnet_SamDump_netlogon(ctx, mem_ctx, r);
+	}
+
+	return NT_STATUS_INVALID_LEVEL;
+}