libcli/drsuapi: Add expected value unit tests for drsuapi_{en,de}crypt_attribute_value()

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

2 files changed, 534 insertions, 0 deletions

diff --git a/libcli/drsuapi/tests/test_repl_decrypt.c b/libcli/drsuapi/tests/test_repl_decrypt.c
new file mode 100644
index 00000000000..6c545e9d022
--- /dev/null
+++ b/libcli/drsuapi/tests/test_repl_decrypt.c
@@ -0,0 +1,522 @@
+/*
+ * Unit tests for source4/rpc_server/dnsserver/dnsutils.c
+ *
+ *  Copyright (C) Catalyst.NET Ltd 2018
+ *  Copyright (C) Andrew Bartlett 2019
+ *
+ * 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/>.
+ *
+ */
+
+/*
+ * from cmocka.c:
+ * These headers or their equivalents should be included prior to
+ * including
+ * this header file.
+ *
+ * #include <stdarg.h>
+ * #include <stddef.h>
+ * #include <setjmp.h>
+ *
+ * This allows test applications to use custom definitions of C standard
+ * library functions and types.
+ *
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+
+#include "../repl_decrypt.c"
+
+
+/*
+ * test encryption and decryption including RID obfustincation
+ */
+static void test_drsuapi_rid_encrypt_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04 };
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	DATA_BLOB encrypted;
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_encrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &plaintext,
+					       &encrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+	assert_int_not_equal(encrypted.length, plaintext.length);
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+
+	assert_int_equal(decrypted.length, plaintext.length);
+
+	assert_memory_equal(decrypted.data, plaintext.data, plaintext.length);
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test encryption and decryption failing RID obfustincation (data length)
+ */
+static void test_drsuapi_bad_len_rid_encrypt_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04, 0x05 };
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	DATA_BLOB encrypted;
+
+	werr = drsuapi_encrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &plaintext,
+					       &encrypted);
+
+	assert_int_equal(W_ERROR_V(werr),
+			 W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER));
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test encryption and decryption failing RID obfustincation (zero rid)
+ */
+static void test_drsuapi_zero_rid_encrypt_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04 };
+	const uint32_t rid = 0;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	DATA_BLOB encrypted;
+
+	werr = drsuapi_encrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &plaintext,
+					       &encrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER));
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test encryption and decryption without RID obfustication
+ */
+static void test_drsuapi_encrypt_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	/* Ensures we can cope with odd lengths */
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04, 0x05 };
+
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	DATA_BLOB encrypted;
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_encrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       false,
+					       0,
+					       &plaintext,
+					       &encrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+	assert_int_not_equal(encrypted.length, plaintext.length);
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       false,
+					       0,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+
+	assert_int_equal(decrypted.length, plaintext.length);
+
+	assert_memory_equal(decrypted.data, plaintext.data, plaintext.length);
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of fixed buffer
+ */
+static void test_drsuapi_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	/* Ensures we can cope with odd lengths */
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04, 0x05 };
+
+	uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F,
+					  0xD4, 0x41, 0xCA, 0xB0,
+					  0x14, 0xFE, 0xFB, 0xA6,
+					  0xB0, 0x32, 0x45, 0x45,
+					  0x9D, 0x76, 0x75, 0xD2,
+					  0xFB, 0x34, 0x77, 0xBD,
+					  0x8C, 0x1E, 0x09, 0x1A,
+					  0xF1, 0xAB, 0xD3, 0x0E,
+					  0xBE, 0x80, 0xAB, 0x19, 0xFC };
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       false,
+					       0,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+
+	assert_int_equal(decrypted.length, plaintext.length);
+
+	assert_memory_equal(decrypted.data, plaintext.data, plaintext.length);
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of fixed buffer (rid decrypt)
+ */
+static void test_drsuapi_rid_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	/* Ensures we can cope with odd lengths */
+	uint8_t test_data[] = { 0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04,
+				0x01, 0x02, 0x03, 0x04 };
+
+	uint8_t encrypted_test_data[] = {0x95, 0xB2, 0xE8, 0x02,
+					 0x05, 0x5E, 0xFD, 0x3D,
+					 0x7D, 0x17, 0xB9, 0x76,
+					 0x4D, 0x91, 0xED, 0x59,
+					 0x98, 0x79, 0x7A, 0xFC,
+					 0x38, 0x73, 0x28, 0x55,
+					 0x62, 0x27, 0x99, 0x3B,
+					 0xD0, 0x18, 0xBD, 0x23,
+					 0x5D, 0x98, 0xFE, 0xA8};
+
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB plaintext = data_blob_const(test_data,
+					     sizeof(test_data));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_OK));
+
+	assert_int_equal(decrypted.length, plaintext.length);
+
+	assert_memory_equal(decrypted.data, plaintext.data, plaintext.length);
+
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of fixed buffer (rid decrypt)
+ */
+static void test_drsuapi_bad_len_rid_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F,
+					  0xD4, 0x41, 0xCA, 0xB0,
+					  0x14, 0xFE, 0xFB, 0xA6,
+					  0xB0, 0x32, 0x45, 0x45,
+					  0x9D, 0x76, 0x75, 0xD2,
+					  0xFB, 0x34, 0x77, 0xBD,
+					  0x8C, 0x1E, 0x09, 0x1A,
+					  0xF1, 0xAB, 0xD3, 0x0E,
+					  0xBE, 0x80, 0xAB, 0x19, 0xFC };
+
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER));
+
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of fixed buffer (rid decrypt)
+ */
+static void test_drsuapi_zero_rid_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t encrypted_test_data[] = { 0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04, 0x05 };
+	const uint32_t rid = 0;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER));
+
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of fixed buffer (bad crc)
+ */
+static void test_drsuapi_bad_crc_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t encrypted_test_data[] = { 0xFF, 0x5C, 0x58, 0x3F,
+					  0xD4, 0x41, 0xCA, 0xB0,
+					  0x14, 0xFE, 0xFB, 0xA6,
+					  0xB0, 0x32, 0x45, 0x45,
+					  0x9D, 0x76, 0x75, 0xD2,
+					  0xFB, 0x34, 0x77, 0xBD,
+					  0x8C, 0x1E, 0x09, 0x1A,
+					  0xF1, 0xAB, 0xD3, 0x0E,
+					  0xBE, 0x80, 0xAB, 0x19, 0xFF };
+
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), HRES_ERROR_V(HRES_SEC_E_DECRYPT_FAILURE));
+
+	TALLOC_FREE(mem_ctx);
+}
+
+/*
+ * test decryption of short buffer
+ */
+static void test_drsuapi_short_decrypt_attribute_value(void **state)
+{
+	uint8_t key[] = { 0xa1, 0xb2, 0xc3, 0xd4,
+			  0xe1, 0xf2, 0x03, 0x14,
+			  0x21, 0x32, 0x43, 0x54,
+			  0x61, 0x72, 0x83, 0x94 };
+
+	uint8_t encrypted_test_data[] = { 0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04,
+					  0x01, 0x02, 0x03, 0x04, 0x05 };
+	const uint32_t rid = 514;
+
+	TALLOC_CTX *mem_ctx = talloc_new(NULL);
+
+	WERROR werr;
+
+	const DATA_BLOB key_blob = data_blob_const(key, sizeof(key));
+	const DATA_BLOB encrypted
+		= data_blob_const(encrypted_test_data,
+				  sizeof(encrypted_test_data));
+	DATA_BLOB decrypted;
+
+	werr = drsuapi_decrypt_attribute_value(mem_ctx,
+					       &key_blob,
+					       true,
+					       rid,
+					       &encrypted,
+					       &decrypted);
+
+	assert_int_equal(W_ERROR_V(werr), W_ERROR_V(WERR_DS_DRA_INVALID_PARAMETER));
+
+	TALLOC_FREE(mem_ctx);
+}
+
+int main(int argc, const char **argv)
+{
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(
+			test_drsuapi_rid_encrypt_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_bad_len_rid_encrypt_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_zero_rid_encrypt_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_encrypt_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_bad_crc_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_rid_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_zero_rid_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_bad_len_rid_decrypt_attribute_value),
+		cmocka_unit_test(
+			test_drsuapi_short_decrypt_attribute_value),
+	};
+
+	cmocka_set_message_output(CM_OUTPUT_SUBUNIT);
+	return cmocka_run_group_tests(tests, NULL, NULL);
+}
diff --git a/libcli/drsuapi/wscript_build b/libcli/drsuapi/wscript_build
index 136a22f8ced..271248215be 100644
--- a/libcli/drsuapi/wscript_build
+++ b/libcli/drsuapi/wscript_build
@@ -6,3 +6,15 @@ bld.SAMBA_SUBSYSTEM('LIBCLI_DRSUAPI',
 	public_deps='LIBCLI_AUTH samdb z'
 	)
 
+if bld.CONFIG_GET('ENABLE_SELFTEST'):
+    bld.SAMBA_BINARY(
+        'test_repl_decrypt',
+        source='tests/test_repl_decrypt.c',
+        deps='''
+            LIBCLI_DRSUAPI
+            cmocka
+            talloc
+        ''',
+        install=False,
+        enabled=bld.AD_DC_BUILD_IS_ENABLED()
+    )