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From f0d4f6ec31079506b01502f7b515245ace03227d Mon Sep 17 00:00:00 2001
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From: Andreas Schneider <asn@samba.org>
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Date: Fri, 5 Jul 2019 09:39:02 +0200
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Subject: [PATCH 011/187] libcli:auth: Add test for decoding an RC4 password
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 buffer
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BUG: https://bugzilla.samba.org/show_bug.cgi?id=14031
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Signed-off-by: Andreas Schneider <asn@samba.org>
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Reviewed-by: Andrew Bartlett <abartlet@samba.org>
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(cherry picked from commit 7ccc76f951a626a25d553ac85c5bf30eb29ffa2b)
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---
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 libcli/auth/tests/test_rc4_passwd_buffer.c | 177 +++++++++++++++++++++
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 libcli/auth/wscript_build                  |   9 ++
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 selftest/tests.py                          |   2 +
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 3 files changed, 188 insertions(+)
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 create mode 100644 libcli/auth/tests/test_rc4_passwd_buffer.c
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diff --git a/libcli/auth/tests/test_rc4_passwd_buffer.c b/libcli/auth/tests/test_rc4_passwd_buffer.c
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new file mode 100644
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index 00000000000..f40ac3a5655
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--- /dev/null
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+++ b/libcli/auth/tests/test_rc4_passwd_buffer.c
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@@ -0,0 +1,177 @@
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+/*
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+ * Unix SMB/CIFS implementation.
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+ *
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+ * Copyright (C) 2018-2019 Andreas Schneider <asn@samba.org>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 3 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include <stdarg.h>
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+#include <stddef.h>
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+#include <stdint.h>
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+#include <setjmp.h>
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+#include <cmocka.h>
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+
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+#include "includes.h"
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+#include "libcli/auth/libcli_auth.h"
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+#include "rpc_client/init_samr.h"
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+
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+#define PASSWORD "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
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+
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+static const uint8_t encrypted_test_blob[] = {
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+	0x37, 0x8e, 0x1d, 0xd5, 0xd3, 0x9f, 0xca, 0x8e,
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+	0x2f, 0x2d, 0xee, 0xc3, 0xb5, 0x50, 0xcd, 0x4e,
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+	0xc9, 0x08, 0x04, 0x68, 0x32, 0xc3, 0xac, 0x8e,
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+	0x53, 0x69, 0xd6, 0xb7, 0x56, 0xcc, 0xc0, 0xbe,
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+	0x4e, 0x96, 0xa7, 0x74, 0xe9, 0xaa, 0x10, 0x3d,
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+	0xd5, 0x8c, 0xaa, 0x12, 0x56, 0xb6, 0xf1, 0x85,
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+	0x21, 0xfa, 0xe9, 0xa1, 0x76, 0xe6, 0xa5, 0x33,
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+	0x33, 0x2f, 0x47, 0x29, 0xd6, 0xbd, 0xde, 0x64,
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+	0x4d, 0x15, 0x3e, 0x6a, 0x11, 0x9b, 0x52, 0xbf,
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+	0x7e, 0x3a, 0xeb, 0x1c, 0x55, 0xd1, 0xb2, 0xa4,
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+	0x35, 0x03, 0x6c, 0x39, 0x61, 0x28, 0x98, 0xc3,
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+	0x2d, 0xd4, 0x70, 0x69, 0x8b, 0x83, 0xe9, 0x62,
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+	0xbe, 0xd8, 0x72, 0x4e, 0xdf, 0xd4, 0xe9, 0xe3,
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+	0x46, 0x2a, 0xf9, 0x3c, 0x0f, 0x41, 0x62, 0xe1,
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+	0x43, 0xf0, 0x91, 0xbe, 0x72, 0xa0, 0xc9, 0x08,
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+	0x73, 0x20, 0x1f, 0x0d, 0x68, 0x2e, 0x32, 0xa1,
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+	0xb8, 0x9b, 0x08, 0xa1, 0xb4, 0x81, 0x6b, 0xf1,
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+	0xde, 0x0c, 0x28, 0x34, 0xe2, 0x65, 0x62, 0x54,
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+	0xeb, 0xc0, 0x71, 0x14, 0xad, 0x36, 0x43, 0x0e,
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+	0x92, 0x4d, 0x11, 0xe8, 0xdd, 0x2d, 0x5f, 0x05,
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+	0xff, 0x07, 0xda, 0x81, 0x4e, 0x27, 0x42, 0xa8,
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+	0xa9, 0x64, 0x4c, 0x74, 0xc8, 0x05, 0xbb, 0x83,
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+	0x5a, 0xd9, 0x90, 0x3e, 0x0d, 0x9d, 0xe5, 0x2f,
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+	0x08, 0xf9, 0x1b, 0xbd, 0x26, 0xc3, 0x0d, 0xac,
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+	0x43, 0xd5, 0x17, 0xf2, 0x61, 0xf5, 0x74, 0x9b,
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+	0xf3, 0x5b, 0x5f, 0xe1, 0x8a, 0xa6, 0xfd, 0xdf,
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+	0xff, 0xb5, 0x8b, 0xf1, 0x26, 0xf7, 0xe0, 0xa7,
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+	0x4f, 0x5b, 0xb8, 0x6d, 0xeb, 0xf6, 0x52, 0x68,
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+	0x8d, 0xa3, 0xd4, 0x7f, 0x56, 0x43, 0xaa, 0xec,
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+	0x58, 0x47, 0x03, 0xee, 0x9b, 0x59, 0xd9, 0x78,
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+	0x9a, 0xfb, 0x9e, 0xe9, 0xa6, 0x61, 0x4e, 0x6d,
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+	0x92, 0x35, 0xd3, 0x37, 0x6e, 0xf2, 0x34, 0x39,
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+	0xd4, 0xd2, 0xeb, 0xcf, 0x1c, 0x10, 0xb3, 0x2b,
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+	0x3e, 0x07, 0x42, 0x3e, 0x20, 0x90, 0x07, 0x3e,
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+	0xc7, 0xed, 0xd4, 0xdf, 0x50, 0xe5, 0xff, 0xaf,
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+	0x05, 0xce, 0x29, 0xbe, 0x01, 0xf8, 0xb0, 0x30,
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+	0x96, 0xae, 0x1b, 0x62, 0x23, 0x93, 0x91, 0x1a,
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+	0x52, 0x98, 0xd9, 0x59, 0xb8, 0x11, 0xec, 0xb8,
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+	0xcf, 0x20, 0x32, 0x90, 0x9e, 0xf2, 0x06, 0x43,
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+	0xb8, 0x36, 0xe3, 0x33, 0x4e, 0x6f, 0x75, 0xeb,
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+	0xf7, 0x6c, 0xac, 0x06, 0x5f, 0x24, 0x8e, 0x4a,
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+	0x03, 0xdf, 0x50, 0x31, 0xaa, 0x91, 0xd5, 0x85,
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+	0x95, 0x78, 0x5b, 0xf4, 0x7f, 0x3e, 0xbc, 0x41,
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+	0xfa, 0x10, 0xd3, 0x0f, 0x86, 0x8b, 0x23, 0xed,
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+	0xfc, 0xcc, 0x3e, 0x7d, 0x8c, 0xb4, 0x7c, 0xec,
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+	0x04, 0x7d, 0x12, 0x53, 0xa1, 0x30, 0xc5, 0xac,
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+	0xf3, 0x1e, 0x54, 0x1f, 0x97, 0x05, 0x86, 0x74,
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+	0x51, 0x13, 0x45, 0x98, 0xb8, 0x50, 0x62, 0x18,
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+	0x0f, 0x6d, 0x66, 0xa4, 0x88, 0x31, 0x76, 0xa3,
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+	0xb0, 0x75, 0x55, 0x44, 0x18, 0x7c, 0x67, 0xc7,
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+	0x09, 0x9c, 0xab, 0x53, 0x49, 0xc0, 0xc9, 0x27,
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+	0x53, 0xa6, 0x99, 0x01, 0x10, 0x49, 0x67, 0x8e,
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+	0x5b, 0x12, 0x96, 0x40, 0x16, 0x39, 0x11, 0x53,
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+	0x44, 0x8f, 0xa9, 0xbe, 0x84, 0xbe, 0xe0, 0x45,
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+	0xe3, 0xfd, 0x48, 0x46, 0x43, 0x53, 0x13, 0x5f,
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+	0xfa, 0xcf, 0x09, 0x67, 0x90, 0xa3, 0x94, 0xaa,
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+	0x0d, 0x1f, 0xc2, 0xc3, 0xd4, 0x7e, 0xc8, 0x14,
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+	0xbe, 0x84, 0xa5, 0x55, 0xee, 0x49, 0x8e, 0x03,
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+	0x1d, 0xaf, 0xad, 0x65, 0x2f, 0xf0, 0xd5, 0x90,
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+	0x5e, 0x8d, 0x29, 0x40, 0xba, 0x57, 0x26, 0xa8,
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+	0x6c, 0x4b, 0x59, 0x40, 0x4e, 0xc2, 0xc4, 0x88,
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+	0x0a, 0x06, 0x2b, 0x6c, 0x2a, 0xc7, 0x3f, 0xfe,
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+	0x37, 0x2c, 0x41, 0x58, 0xfe, 0x7e, 0xaf, 0xd1,
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+	0xd9, 0xd2, 0x9c, 0xd7, 0x8a, 0x01, 0x0e, 0x8c,
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+	0x9e, 0x8b, 0x5d, 0x72, 0x54, 0x00, 0xbe, 0xb2,
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+	0x9a, 0xc7, 0xfd, 0x83, 0x1e, 0x9c, 0x79, 0xdd,
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+	0x15, 0x13, 0xdc, 0x15,
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+};
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+
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+static void torture_decode_rc4_passwd_buffer(void **state)
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+{
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+	char *password_decoded = NULL;
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+	size_t password_decoded_len = 0;
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+	DATA_BLOB session_key = data_blob_const("SystemLibraryDTC", 16);
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+	struct samr_CryptPasswordEx out_pwd_buf = {
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+		.data = {0},
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+	};
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+	NTSTATUS status;
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+	bool ok;
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+
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+	memcpy(out_pwd_buf.data,
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+	       encrypted_test_blob,
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+	       sizeof(out_pwd_buf.data));
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+
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+	status = encode_or_decode_arc4_passwd_buffer(out_pwd_buf.data,
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+						     &session_key);
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+	assert_true(NT_STATUS_IS_OK(status));
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+
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+	ok = decode_pw_buffer(NULL,
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+			      out_pwd_buf.data,
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+			      &password_decoded,
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+			      &password_decoded_len,
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+			      CH_UTF16);
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+	assert_true(ok);
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+	assert_int_equal(password_decoded_len, strlen(PASSWORD));
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+	assert_string_equal(password_decoded, PASSWORD);
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+}
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+
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+static void torture_rc4_passwd_buffer(void **state)
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+{
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+	char *password_decoded = NULL;
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+	size_t password_decoded_len = 0;
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+	DATA_BLOB session_key = data_blob_const("SystemLibraryDTC", 16);
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+	struct samr_CryptPasswordEx out_pwd_buf = {
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+		.data = {0},
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+	};
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+	NTSTATUS status;
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+	bool ok;
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+
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+	status = init_samr_CryptPasswordEx(PASSWORD,
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+					   &session_key,
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+					   &out_pwd_buf);
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+	assert_true(NT_STATUS_IS_OK(status));
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+
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+	status = encode_or_decode_arc4_passwd_buffer(out_pwd_buf.data,
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+						     &session_key);
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+	assert_true(NT_STATUS_IS_OK(status));
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+
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+	ok = decode_pw_buffer(NULL,
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+			      out_pwd_buf.data,
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+			      &password_decoded,
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+			      &password_decoded_len,
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+			      CH_UTF16);
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+	assert_true(ok);
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+	assert_int_equal(password_decoded_len, strlen(PASSWORD));
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+	assert_string_equal(password_decoded, PASSWORD);
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+}
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+
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+int main(int argc, char *argv[])
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+{
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+	int rc;
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+	const struct CMUnitTest tests[] = {
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+		cmocka_unit_test(torture_decode_rc4_passwd_buffer),
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+		cmocka_unit_test(torture_rc4_passwd_buffer),
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+	};
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+
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+	if (argc == 2) {
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+		cmocka_set_test_filter(argv[1]);
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+	}
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+	cmocka_set_message_output(CM_OUTPUT_SUBUNIT);
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+
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+	rc = cmocka_run_group_tests(tests, NULL, NULL);
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+
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+	return rc;
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+}
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diff --git a/libcli/auth/wscript_build b/libcli/auth/wscript_build
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index 04e2b09eadf..eabf3814ba1 100644
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--- a/libcli/auth/wscript_build
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+++ b/libcli/auth/wscript_build
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@@ -62,3 +62,12 @@ bld.SAMBA_BINARY('test_schannel',
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                       cmocka
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                       ''',
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                  install=False)
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+
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+bld.SAMBA_BINARY('test_rc4_passwd_buffer',
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+                 source='tests/test_rc4_passwd_buffer.c',
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+                 deps='''
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+                      INIT_SAMR
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+                      LIBCLI_AUTH
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+                      cmocka
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+                      ''',
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+                 install=False)
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diff --git a/selftest/tests.py b/selftest/tests.py
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index bbb5709ee47..c91d9b445fe 100644
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--- a/selftest/tests.py
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+++ b/selftest/tests.py
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@@ -392,6 +392,8 @@ plantestsuite("samba.unittests.ntlm_check", "none",
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               [os.path.join(bindir(), "default/libcli/auth/test_ntlm_check")])
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 plantestsuite("samba.unittests.schannel", "none",
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               [os.path.join(bindir(), "default/libcli/auth/test_schannel")])
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+plantestsuite("samba.unittests.rc4_passwd_buffer", "none",
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+              [os.path.join(bindir(), "default/libcli/auth/test_rc4_passwd_buffer")])
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 plantestsuite("samba.unittests.test_registry_regfio", "none",
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               [os.path.join(bindir(), "default/source3/test_registry_regfio")])
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 plantestsuite("samba.unittests.test_oLschema2ldif", "none",
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-- 
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2.23.0
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