VBoot Reference: Add kernel rollback prevention and choosing logic.
Also adds tests for kernel rollback prevention.
Review URL: http://codereview.chromium.org/1320010
diff --git a/tests/kernel_rollback_tests.c b/tests/kernel_rollback_tests.c
new file mode 100644
index 0000000..c956300
--- /dev/null
+++ b/tests/kernel_rollback_tests.c
@@ -0,0 +1,149 @@
+/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Tests for checking kernel rollback-prevention logic.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "file_keys.h"
+#include "kernel_image.h"
+#include "rsa_utility.h"
+#include "rollback_index.h"
+#include "test_common.h"
+#include "utility.h"
+
+/* Tests that check for correctness of the VerifyFirmwareDriver_f() logic
+ * and rollback prevention. */
+void VerifyKernelDriverTest(void) {
+ uint64_t len;
+ uint8_t* firmware_key_pub = BufferFromFile("testkeys/key_rsa1024.keyb",
+ &len);
+ /* Initialize kernel blobs, including their associated parition
+ * table attributed. */
+ kernel_entry valid_kernelA = {
+ GenerateRollbackTestKernelBlob(1, 1, 0),
+ 15, /* Highest Priority. */
+ 5, /* Enough for tests. */
+ 0 /* Assume we haven't boot off it yet. */
+ };
+ kernel_entry corrupt_kernelA = {
+ GenerateRollbackTestKernelBlob(1, 1, 1),
+ 15, /* Highest Priority. */
+ 5, /* Enough for tests. */
+ 0 /* Assume we haven't boot off it yet. */
+ };
+ kernel_entry valid_kernelB = {
+ GenerateRollbackTestKernelBlob(1, 1, 0),
+ 1, /* Lower Priority. */
+ 5, /* Enough for tests. */
+ 0 /* Assume we haven't boot off it yet. */
+ };
+ kernel_entry corrupt_kernelB = {
+ GenerateRollbackTestKernelBlob(1, 1, 1),
+ 1, /* Lower Priority. */
+ 5, /* Enough for tests. */
+ 0 /* Assume we haven't boot off it yet. */
+ };
+
+ /* Initialize rollback index state. */
+ g_kernel_key_version = 1;
+ g_kernel_version = 1;
+
+ /* Note: This test just checks the rollback prevention mechanism and not
+ * the full blown kernel boot logic. Updates to the kernel attributes
+ * in the paritition table are not tested.
+ */
+ fprintf(stderr, "Kernel A boot priority(15) > Kernel B boot priority(1)\n");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_A_CONTINUE,
+ "(Valid Kernel A (current version)\n"
+ " Valid Kernel B (current version) runs A):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &corrupt_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_B_CONTINUE,
+ "(Corrupt Kernel A (current version)\n"
+ " Valid Kernel B (current version) runs B):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &corrupt_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_A_CONTINUE,
+ "(Valid Kernel A (current version)\n"
+ " Corrupt Kernel B (current version) runs A):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &corrupt_kernelA, &corrupt_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_RECOVERY_CONTINUE,
+ "(Corrupt Kernel A (current version)\n"
+ " Corrupt Kernel B (current version) runs Recovery):");
+
+ fprintf(stderr, "\nSwapping boot priorities...\n"
+ "Kernel B boot priority(15) > Kernel A boot priority(1)\n");
+ valid_kernelA.boot_priority = corrupt_kernelA.boot_priority = 1;
+ valid_kernelB.boot_priority = corrupt_kernelB.boot_priority = 15;
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_B_CONTINUE,
+ "(Valid Kernel A (current version)\n"
+ " Valid Kernel B (current version) runs B):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &corrupt_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_B_CONTINUE,
+ "(Corrupt Kernel A (current version)\n"
+ " Valid Kernel B (current version) runs B):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &corrupt_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_A_CONTINUE,
+ "(Valid Kernel A (current version)\n"
+ " Corrupt Kernel B (current version) runs A):");
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &corrupt_kernelA, &corrupt_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_RECOVERY_CONTINUE,
+ "(Corrupt Kernel A (current version)\n"
+ " Corrupt Kernel B (current version) runs Recovery):");
+
+ fprintf(stderr, "\nUpdating stored version information. Obsoleting "
+ "exiting kernel images.\n");
+ g_kernel_key_version = 2;
+ g_kernel_version = 2;
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_RECOVERY_CONTINUE,
+ "(Valid Kernel A (old version)\n"
+ " Valid Kernel B (old version) runs Recovery):");
+
+ fprintf(stderr, "\nGenerating updated Kernel A blob with "
+ "new version.\n");
+ Free(valid_kernelA.kernel_blob);
+ valid_kernelA.kernel_blob = GenerateRollbackTestKernelBlob(3, 3, 0);
+ TEST_EQ(VerifyKernelDriver_f(firmware_key_pub,
+ &valid_kernelA, &valid_kernelB,
+ DEV_MODE_DISABLED),
+ BOOT_KERNEL_A_CONTINUE,
+ "(Valid Kernel A (new version)\n"
+ " Valid Kernel B (old version) runs A):");
+
+ Free(firmware_key_pub);
+ Free(valid_kernelA.kernel_blob);
+ Free(valid_kernelB.kernel_blob);
+ Free(corrupt_kernelA.kernel_blob);
+ Free(corrupt_kernelB.kernel_blob);
+}
+
+int main(int argc, char* argv[]) {
+ int error_code = 0;
+ VerifyKernelDriverTest();
+ if (!gTestSuccess)
+ error_code = 255;
+ return error_code;
+}