Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 209 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;
+}
+