esp32c3: Add tests for esp_sha, stack checker

From internal commit 6d894813

components/esp32c3/test/CMakeLists.txt

@@ -0,0 +1,9 @@
+if(IDF_TARGET STREQUAL "esp32c3")
+    idf_component_register(SRC_DIRS .
+                        INCLUDE_DIRS . ${CMAKE_CURRENT_BINARY_DIR}
+                        REQUIRES unity test_utils esp_common
+                        )
+
+    idf_build_set_property(COMPILE_DEFINITIONS "-DESP_TIMER_DYNAMIC_OVERFLOW_VAL" APPEND)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-u ld_include_test_dport_xt_highint5")
+endif()

components/esp32c3/test/component.mk

@@ -0,0 +1,4 @@
+#
+# Component Makefile (not used for tests, but CI checks test parity between GNU Make & CMake)
+#
+COMPONENT_CONFIG_ONLY := 1

components/esp32c3/test/test_sha.c

@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "esp_types.h"
+#include "esp32c3/clk.h"
+#include "esp_log.h"
+#include "esp_timer.h"
+#include "esp_heap_caps.h"
+#include "idf_performance.h"
+
+#include "unity.h"
+#include "test_utils.h"
+#include "mbedtls/sha1.h"
+#include "mbedtls/sha256.h"
+#include "sha/sha_dma.h"
+
+/* Note: Most of the SHA functions are called as part of mbedTLS, so
+are tested as part of mbedTLS tests. Only esp_sha() is different.
+*/
+
+#define TAG "sha_test"
+
+TEST_CASE("Test esp_sha()", "[hw_crypto]")
+{
+    const size_t BUFFER_SZ = 32 * 1024 + 6; // NB: not an exact multiple of SHA block size
+
+    int64_t begin, end;
+    uint32_t us_sha1;
+    uint8_t sha1_result[20] = { 0 };
+    void *buffer = heap_caps_malloc(BUFFER_SZ, MALLOC_CAP_8BIT|MALLOC_CAP_INTERNAL);
+    TEST_ASSERT_NOT_NULL(buffer);
+    memset(buffer, 0xEE, BUFFER_SZ);
+
+    const uint8_t sha1_expected[20] = { 0xc7, 0xbb, 0xd3, 0x74, 0xf2, 0xf6, 0x20, 0x86,
+                                        0x61, 0xf4, 0x50, 0xd5, 0xf5, 0x18, 0x44, 0xcc,
+                                        0x7a, 0xb7, 0xa5, 0x4a };
+
+    begin = esp_timer_get_time();
+    esp_sha(SHA1, buffer, BUFFER_SZ, sha1_result);
+    end = esp_timer_get_time();
+    TEST_ASSERT_EQUAL_HEX8_ARRAY(sha1_expected, sha1_result, sizeof(sha1_expected));
+    us_sha1 = end - begin;
+    ESP_LOGI(TAG, "esp_sha() 32KB SHA1 in %u us", us_sha1);
+
+    free(buffer);
+
+    TEST_PERFORMANCE_CCOMP_LESS_THAN(TIME_SHA1_32KB, "%dus", us_sha1);
+}
+
+TEST_CASE("Test esp_sha() function with long input", "[hw_crypto]")
+{
+    const void* ptr;
+    spi_flash_mmap_handle_t handle;
+    uint8_t sha1_espsha[20] = { 0 };
+    uint8_t sha1_mbedtls[20] = { 0 };
+    uint8_t sha256_espsha[32] = { 0 };
+    uint8_t sha256_mbedtls[32] = { 0 };
+
+    const size_t LEN = 1024 * 1024;
+
+    /* mmap() 1MB of flash, we don't care what it is really */
+    esp_err_t err = spi_flash_mmap(0x0, LEN, SPI_FLASH_MMAP_DATA, &ptr, &handle);
+
+    TEST_ASSERT_EQUAL_HEX32(ESP_OK, err);
+    TEST_ASSERT_NOT_NULL(ptr);
+
+    /* Compare esp_sha() result to the mbedTLS result, should always be the same */
+
+    esp_sha(SHA1, ptr, LEN, sha1_espsha);
+    int r = mbedtls_sha1_ret(ptr, LEN, sha1_mbedtls);
+    TEST_ASSERT_EQUAL(0, r);
+
+    esp_sha(SHA2_256, ptr, LEN, sha256_espsha);
+    r = mbedtls_sha256_ret(ptr, LEN, sha256_mbedtls, 0);
+    TEST_ASSERT_EQUAL(0, r);
+
+    TEST_ASSERT_EQUAL_MEMORY_MESSAGE(sha1_espsha, sha1_mbedtls, sizeof(sha1_espsha), "SHA1 results should match");
+
+    TEST_ASSERT_EQUAL_MEMORY_MESSAGE(sha256_espsha, sha256_mbedtls, sizeof(sha256_espsha), "SHA256 results should match");
+}

components/esp32c3/test/test_stack_check.c

@@ -0,0 +1,25 @@
+#include "unity.h"
+
+#if CONFIG_COMPILER_STACK_CHECK
+
+static void recur_and_smash(void)
+{
+    static int cnt;
+    volatile uint8_t buf[50];
+    volatile int num = sizeof(buf)+10;
+
+    if (cnt++ < 1) {
+        recur_and_smash();
+    }
+    for (int i = 0; i < num; i++) {
+        buf[i] = 0;
+    }
+}
+
+
+TEST_CASE("stack smashing protection", "[stack_check] [ignore]")
+{
+    recur_and_smash();
+}
+
+#endif

components/esp32c3/test/test_stack_check_cxx.cpp

@@ -0,0 +1,25 @@
+#include "unity.h"
+
+#if CONFIG_COMPILER_STACK_CHECK
+
+static void recur_and_smash_cxx(void)
+{
+    static int cnt;
+    volatile uint8_t buf[50];
+    volatile int num = sizeof(buf)+10;
+
+    if (cnt++ < 1) {
+        recur_and_smash_cxx();
+    }
+    for (int i = 0; i < num; i++) {
+        buf[i] = 0;
+    }
+}
+
+
+TEST_CASE("stack smashing protection CXX", "[stack_check] [ignore]")
+{
+    recur_and_smash_cxx();
+}
+
+#endif