Added missing unit test file

Author: danielinux

tools/unit-tests/unit-update-disk.c

@@ -0,0 +1,280 @@
+#define WOLFBOOT_UPDATE_DISK
+#define WOLFBOOT_SKIP_BOOT_VERIFY
+#define EXT_ENCRYPTED
+#define ENCRYPT_WITH_CHACHA
+#define HAVE_CHACHA
+#define IMAGE_HEADER_SIZE 256
+#define BOOT_PART_A 0
+#define BOOT_PART_B 1
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <check.h>
+
+#include "target.h"
+#include "wolfboot/wolfboot.h"
+#include "image.h"
+#include "loader.h"
+#include <wolfssl/wolfcrypt/chacha.h>
+
+#define TEST_PAYLOAD_SIZE 64
+
+static uint8_t load_buffer[TEST_PAYLOAD_SIZE];
+#define WOLFBOOT_LOAD_ADDRESS ((uintptr_t)load_buffer)
+
+static uint8_t part_a_image[IMAGE_HEADER_SIZE + TEST_PAYLOAD_SIZE];
+static uint8_t part_b_image[IMAGE_HEADER_SIZE + TEST_PAYLOAD_SIZE];
+static int mock_disk_init_ret;
+static int mock_disk_close_called;
+static int mock_do_boot_called;
+static const uint32_t *mock_boot_address;
+
+ChaCha chacha;
+
+static void set_u16_le(uint8_t *dst, uint16_t value)
+{
+    dst[0] = (uint8_t)(value & 0xFF);
+    dst[1] = (uint8_t)(value >> 8);
+}
+
+static void set_u32_le(uint8_t *dst, uint32_t value)
+{
+    dst[0] = (uint8_t)(value & 0xFF);
+    dst[1] = (uint8_t)((value >> 8) & 0xFF);
+    dst[2] = (uint8_t)((value >> 16) & 0xFF);
+    dst[3] = (uint8_t)(value >> 24);
+}
+
+static void build_image(uint8_t *image, uint32_t version, uint8_t fill)
+{
+    memset(image, 0, IMAGE_HEADER_SIZE + TEST_PAYLOAD_SIZE);
+    set_u32_le(image, WOLFBOOT_MAGIC);
+    set_u32_le(image + sizeof(uint32_t), TEST_PAYLOAD_SIZE);
+    set_u16_le(image + IMAGE_HEADER_OFFSET, HDR_VERSION);
+    set_u16_le(image + IMAGE_HEADER_OFFSET + sizeof(uint16_t), 4);
+    set_u32_le(image + IMAGE_HEADER_OFFSET + 2 * sizeof(uint16_t), version);
+    memset(image + IMAGE_HEADER_SIZE, fill, TEST_PAYLOAD_SIZE);
+}
+
+static void reset_mocks(void)
+{
+    memset(load_buffer, 0, sizeof(load_buffer));
+    memset(part_a_image, 0, sizeof(part_a_image));
+    memset(part_b_image, 0, sizeof(part_b_image));
+    build_image(part_a_image, 1, 0xA1);
+    build_image(part_b_image, 2, 0xB2);
+    mock_disk_init_ret = 0;
+    mock_disk_close_called = 0;
+    mock_do_boot_called = 0;
+    mock_boot_address = NULL;
+    wolfBoot_panicked = 0;
+}
+
+int chacha_init(void)
+{
+    return 0;
+}
+
+int wc_Chacha_SetIV(ChaCha* ctx, const byte* inIv, word32 counter)
+{
+    (void)ctx;
+    (void)inIv;
+    (void)counter;
+    return 0;
+}
+
+int wc_Chacha_Process(ChaCha* ctx, byte* output, const byte* input, word32 msglen)
+{
+    (void)ctx;
+    memmove(output, input, msglen);
+    return 0;
+}
+
+void ForceZero(void* mem, size_t len)
+{
+    volatile uint8_t *p = (volatile uint8_t *)mem;
+    while (len-- > 0) {
+        *p++ = 0;
+    }
+}
+
+int wolfBoot_initialize_encryption(void)
+{
+    return 0;
+}
+
+int wolfBoot_get_encrypt_key(uint8_t *key, uint8_t *nonce)
+{
+    memset(key, 0x5A, ENCRYPT_KEY_SIZE);
+    memset(nonce, 0xC3, ENCRYPT_NONCE_SIZE);
+    return 0;
+}
+
+int disk_init(int drv)
+{
+    (void)drv;
+    return mock_disk_init_ret;
+}
+
+int disk_open(int drv)
+{
+    (void)drv;
+    return 0;
+}
+
+void disk_close(int drv)
+{
+    (void)drv;
+    mock_disk_close_called++;
+}
+
+int disk_part_read(int drv, int part, uint64_t off, uint64_t sz, uint8_t *buf)
+{
+    uint8_t *image;
+
+    (void)drv;
+    image = (part == BOOT_PART_B) ? part_b_image : part_a_image;
+    if (off + sz > IMAGE_HEADER_SIZE + TEST_PAYLOAD_SIZE)
+        return -1;
+    memcpy(buf, image + off, (size_t)sz);
+    return (int)sz;
+}
+
+int wolfBoot_open_image_address(struct wolfBoot_image* img, uint8_t* image)
+{
+    uint32_t magic = *(uint32_t *)image;
+
+    if (magic != WOLFBOOT_MAGIC)
+        return -1;
+    memset(img, 0, sizeof(*img));
+    img->hdr = image;
+    img->fw_size = *(uint32_t *)(image + sizeof(uint32_t));
+    img->fw_base = image + IMAGE_HEADER_SIZE;
+    img->hdr_ok = 1;
+    return 0;
+}
+
+int wolfBoot_verify_integrity(struct wolfBoot_image* img)
+{
+    (void)img;
+    return 0;
+}
+
+int wolfBoot_verify_authenticity(struct wolfBoot_image* img)
+{
+    (void)img;
+    return 0;
+}
+
+int wolfBoot_get_dts_size(void *dts_addr)
+{
+    (void)dts_addr;
+    return -1;
+}
+
+void hal_prepare_boot(void)
+{
+}
+
+void do_boot(const uint32_t *address)
+{
+    mock_do_boot_called++;
+    mock_boot_address = address;
+}
+
+#include "update_disk.c"
+
+START_TEST(test_update_disk_zeroizes_key_material_on_panic)
+{
+    size_t i;
+
+    reset_mocks();
+    mock_disk_init_ret = -1;
+
+    wolfBoot_start();
+
+    ck_assert_int_eq(wolfBoot_panicked, 1);
+    for (i = 0; i < ENCRYPT_KEY_SIZE; i++) {
+        ck_assert_uint_eq(disk_encrypt_key[i], 0);
+    }
+    for (i = 0; i < ENCRYPT_NONCE_SIZE; i++) {
+        ck_assert_uint_eq(disk_encrypt_nonce[i], 0);
+    }
+}
+END_TEST
+
+START_TEST(test_update_disk_zeroizes_key_material_before_boot)
+{
+    size_t i;
+
+    reset_mocks();
+
+    wolfBoot_start();
+
+    ck_assert_int_eq(wolfBoot_panicked, 0);
+    ck_assert_int_eq(mock_disk_close_called, 1);
+    ck_assert_int_eq(mock_do_boot_called, 1);
+    ck_assert_ptr_eq(mock_boot_address, (const uint32_t *)WOLFBOOT_LOAD_ADDRESS);
+    for (i = 0; i < ENCRYPT_KEY_SIZE; i++) {
+        ck_assert_uint_eq(disk_encrypt_key[i], 0);
+    }
+    for (i = 0; i < ENCRYPT_NONCE_SIZE; i++) {
+        ck_assert_uint_eq(disk_encrypt_nonce[i], 0);
+    }
+}
+END_TEST
+
+START_TEST(test_get_decrypted_blob_version_rejects_truncated_version_tlv)
+{
+    uint8_t hdr[IMAGE_HEADER_SIZE + 2];
+    uint8_t *p;
+
+    memset(hdr, 0, sizeof(hdr));
+    set_u32_le(hdr, WOLFBOOT_MAGIC);
+
+    p = hdr + IMAGE_HEADER_SIZE - 6;
+    {
+        uint8_t *q;
+
+        for (q = hdr + IMAGE_HEADER_OFFSET; q < p; q += 2) {
+            q[0] = 0xFF;
+            if (q + 1 < p)
+                q[1] = 0x00;
+        }
+    }
+    set_u16_le(p, HDR_VERSION);
+    set_u16_le(p + sizeof(uint16_t), 4);
+    p[4] = 0x11;
+    p[5] = 0x22;
+    p[6] = 0x33;
+    p[7] = 0x44;
+
+    ck_assert_uint_eq(get_decrypted_blob_version(hdr), 0);
+}
+END_TEST
+
+Suite *wolfboot_suite(void)
+{
+    Suite *s = suite_create("wolfBoot");
+    TCase *tc = tcase_create("update-disk");
+
+    tcase_add_test(tc, test_update_disk_zeroizes_key_material_on_panic);
+    tcase_add_test(tc, test_update_disk_zeroizes_key_material_before_boot);
+    tcase_add_test(tc, test_get_decrypted_blob_version_rejects_truncated_version_tlv);
+    suite_add_tcase(s, tc);
+
+    return s;
+}
+
+int main(void)
+{
+    int fails;
+    Suite *s = wolfboot_suite();
+    SRunner *sr = srunner_create(s);
+
+    srunner_run_all(sr, CK_NORMAL);
+    fails = srunner_ntests_failed(sr);
+    srunner_free(sr);
+    return fails;
+}