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-rw-r--r--libcli/samsync/decrypt.c209
-rw-r--r--libcli/samsync/samsync.h36
-rw-r--r--libcli/samsync/wscript_build8
3 files changed, 253 insertions, 0 deletions
diff --git a/libcli/samsync/decrypt.c b/libcli/samsync/decrypt.c
new file mode 100644
index 0000000..77ef932
--- /dev/null
+++ b/libcli/samsync/decrypt.c
@@ -0,0 +1,209 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Extract the user/system database from a remote SamSync server
+
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
+ Copyright (C) Guenther Deschner <gd@samba.org> 2008
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#include "includes.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "../libcli/samsync/samsync.h"
+#include "librpc/gen_ndr/ndr_netlogon.h"
+#include "lib/crypto/gnutls_helpers.h"
+
+/**
+ * Decrypt and extract the user's passwords.
+ *
+ * The writes decrypted (no longer 'RID encrypted' or arcfour encrypted)
+ * passwords back into the structure
+ */
+
+static NTSTATUS fix_user(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds,
+ enum netr_SamDatabaseID database_id,
+ 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;
+ int rc;
+
+ /* Note that win2000 may send us all zeros
+ * for the hashes if it doesn't
+ * think this channel is secure enough. */
+ if (user->lm_password_present) {
+ if (!all_zero(user->lmpassword.hash, 16)) {
+ rc = sam_rid_crypt(rid, user->lmpassword.hash,
+ lm_hash.hash, SAMBA_GNUTLS_DECRYPT);
+ if (rc != 0) {
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ }
+ } else {
+ memset(lm_hash.hash, '\0', sizeof(lm_hash.hash));
+ }
+ user->lmpassword = lm_hash;
+ }
+
+ if (user->nt_password_present) {
+ if (!all_zero(user->ntpassword.hash, 16)) {
+ rc = sam_rid_crypt(rid, user->ntpassword.hash,
+ nt_hash.hash, SAMBA_GNUTLS_DECRYPT);
+ if (rc != 0) {
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ }
+ } else {
+ memset(nt_hash.hash, '\0', sizeof(nt_hash.hash));
+ }
+ user->ntpassword = nt_hash;
+ }
+
+ if (user->user_private_info.SensitiveData) {
+ DATA_BLOB data;
+ struct netr_USER_KEYS keys;
+ enum ndr_err_code ndr_err;
+ NTSTATUS status;
+
+ data.data = user->user_private_info.SensitiveData;
+ data.length = user->user_private_info.DataLength;
+
+ status = netlogon_creds_arcfour_crypt(creds,
+ data.data,
+ data.length);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ user->user_private_info.SensitiveData = data.data;
+ user->user_private_info.DataLength = data.length;
+
+ ndr_err = ndr_pull_struct_blob(&data, mem_ctx, &keys,
+ (ndr_pull_flags_fn_t)ndr_pull_netr_USER_KEYS);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ dump_data(10, data.data, data.length);
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ /* Note that win2000 may send us all zeros
+ * for the hashes if it doesn't
+ * think this channel is secure enough. */
+ if (keys.keys.keys2.lmpassword.length == 16) {
+ if (!all_zero(keys.keys.keys2.lmpassword.pwd.hash,
+ 16)) {
+ rc = sam_rid_crypt(rid,
+ keys.keys.keys2.lmpassword.pwd.hash,
+ lm_hash.hash, SAMBA_GNUTLS_DECRYPT);
+ if (rc != 0) {
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ }
+ } else {
+ memset(lm_hash.hash, '\0', sizeof(lm_hash.hash));
+ }
+ user->lmpassword = lm_hash;
+ user->lm_password_present = true;
+ }
+ if (keys.keys.keys2.ntpassword.length == 16) {
+ if (!all_zero(keys.keys.keys2.ntpassword.pwd.hash,
+ 16)) {
+ rc = sam_rid_crypt(rid,
+ keys.keys.keys2.ntpassword.pwd.hash,
+ nt_hash.hash, SAMBA_GNUTLS_DECRYPT);
+ if (rc != 0) {
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ }
+ } else {
+ memset(nt_hash.hash, '\0', sizeof(nt_hash.hash));
+ }
+ user->ntpassword = nt_hash;
+ user->nt_password_present = true;
+ }
+ /* TODO: rid decrypt history fields */
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ * Decrypt and extract the secrets
+ *
+ * The writes decrypted secrets back into the structure
+ */
+static NTSTATUS fix_secret(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds,
+ enum netr_SamDatabaseID database,
+ struct netr_DELTA_ENUM *delta)
+{
+ struct netr_DELTA_SECRET *secret = delta->delta_union.secret;
+ NTSTATUS status;
+
+ status = netlogon_creds_arcfour_crypt(creds,
+ secret->current_cipher.cipher_data,
+ secret->current_cipher.maxlen);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = netlogon_creds_arcfour_crypt(creds,
+ secret->old_cipher.cipher_data,
+ secret->old_cipher.maxlen);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/**
+ * Fix up the delta, dealing with encryption issues so that the final
+ * callback need only do the printing or application logic
+ */
+
+NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds,
+ enum netr_SamDatabaseID database_id,
+ struct netr_DELTA_ENUM *delta)
+{
+ NTSTATUS status = NT_STATUS_OK;
+
+ switch (delta->delta_type) {
+ case NETR_DELTA_USER:
+
+ status = fix_user(mem_ctx,
+ creds,
+ database_id,
+ delta);
+ break;
+ case NETR_DELTA_SECRET:
+
+ status = fix_secret(mem_ctx,
+ creds,
+ database_id,
+ delta);
+ break;
+ default:
+ break;
+ }
+
+ return status;
+}
+
diff --git a/libcli/samsync/samsync.h b/libcli/samsync/samsync.h
new file mode 100644
index 0000000..0cd55e4
--- /dev/null
+++ b/libcli/samsync/samsync.h
@@ -0,0 +1,36 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Extract the user/system database from a remote SamSync server
+
+ Copyright (C) Guenther Deschner <gd@samba.org> 2008
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __SAMSYNC_SAMSYNC_H__
+#define __SAMSYNC_SAMSYNC_H__
+
+struct netlogon_creds_CredentialState;
+
+/**
+ * Fix up the delta, dealing with encryption issues so that the final
+ * callback need only do the printing or application logic
+ */
+NTSTATUS samsync_fix_delta(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds,
+ enum netr_SamDatabaseID database_id,
+ struct netr_DELTA_ENUM *delta);
+
+#endif /* __SAMSYNC_SAMSYNC_H__ */
diff --git a/libcli/samsync/wscript_build b/libcli/samsync/wscript_build
new file mode 100644
index 0000000..767f7da
--- /dev/null
+++ b/libcli/samsync/wscript_build
@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+
+
+bld.SAMBA_SUBSYSTEM('LIBCLI_SAMSYNC',
+ source='decrypt.c',
+ public_deps='LIBCLI_AUTH'
+ )
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 21:26:26 +0000