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hmac: Added Downstream JTAG enable mode for esp32c3

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If JTAG is disabled temporarily by burning SOFT_DIS_JTAG, it can be
re-enabled temporarily through esp_hmac_jtag_enable API
This commit is contained in:
Sachin Parekh
2021-08-31 14:32:53 +05:30
parent 96b204bc9e
commit c215bb04f6
4 changed files with 96 additions and 35 deletions
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45
components/esp32s2/test/test_hmac.c
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@@ -29,17 +29,12 @@ typedef struct {
uint8_t result[32];
} hmac_result;
static const ets_efuse_block_t key_block = ETS_EFUSE_BLOCK_KEY4;
static const char *TAG = "test_hmac";
static void setup_keyblock(void) {
static void setup_keyblock(esp_efuse_block_t key_block, esp_efuse_purpose_t purpose) {
const uint8_t key_data[32] = {
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
25,26,27,28,29,30,31,32
};
int ets_status = ets_efuse_write_key(key_block,
ETS_EFUSE_KEY_PURPOSE_HMAC_UP,
key_data, sizeof(key_data));
esp_err_t status = esp_efuse_write_key(key_block, purpose, key_data, sizeof(key_data));
if (ets_status == ESP_OK) {
printf("written key!\n");
@@ -52,10 +47,7 @@ TEST_CASE("HMAC 'downstream' JTAG Enable mode", "[hw_crypto]")
{
int ets_status;
const uint8_t key_data[32] = {
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,
25,26,27,28,29,30,31,32
};
setup_keyblock(EFUSE_BLK_KEY3, ESP_EFUSE_KEY_PURPOSE_HMAC_DOWN_JTAG);
// Results calculated with Python:
//
@@ -67,31 +59,13 @@ TEST_CASE("HMAC 'downstream' JTAG Enable mode", "[hw_crypto]")
0x8e, 0x6c, 0x3e, 0x8e, 0x6e, 0x17, 0x62, 0x5c, 0x50, 0xac, 0x66, 0xa9, 0xa8, 0x57, 0x94, 0x9b
};
ets_status = ets_efuse_write_key(ETS_EFUSE_BLOCK_KEY3,
ETS_EFUSE_KEY_PURPOSE_HMAC_DOWN_JTAG,
key_data, sizeof(key_data));
if (ets_status == ESP_OK) {
ESP_LOGI(TAG, "HMAC_DOWN_JTAG key programmed!");
} else {
ESP_LOGW(TAG, "HMAC_DOWN_JTAG key programming failed, \
maybe written already. Continuing");
}
TEST_ASSERT_MESSAGE(ESP_OK == esp_efuse_batch_write_begin(),
"Error programming security efuse.\n");
ets_status = esp_efuse_set_read_protect(ETS_EFUSE_BLOCK_KEY3);
if (ets_status != ESP_OK) {
ESP_LOGW(TAG, "EFUSE_BLOCK read protect setting failed. \
Not a must prerequisite to run this test case. Continuing");
}
ets_status = esp_efuse_write_field_cnt(ESP_EFUSE_SOFT_DIS_JTAG, ESP_EFUSE_SOFT_DIS_JTAG[0]->bit_count);
ets_status = esp_efuse_write_field_bit(ESP_EFUSE_SOFT_DIS_JTAG);
if (ets_status != ESP_OK) {
ESP_LOGI(TAG, "JTAG Disable temporarily failed. \
May be disabled already. Continuing the test.");
}
TEST_ASSERT_MESSAGE(ets_status == ESP_OK || ets_status == ESP_ERR_EFUSE_CNT_IS_FULL,
"JTAG Disable temporarily failed.\n");
TEST_ASSERT_MESSAGE(ESP_OK == esp_efuse_batch_write_commit(),
"Error programming security efuse.\n");
@@ -110,7 +84,7 @@ TEST_CASE("HMAC 'upstream' MAC generation with zeroes", "[hw_crypto]")
{
uint8_t hmac[32];
setup_keyblock();
setup_keyblock(EFUSE_BLK_KEY4, ESP_EFUSE_KEY_PURPOSE_HMAC_UP);
const uint8_t zeroes[128] = { };
// Produce the HMAC of various numbers of zeroes
@@ -205,7 +179,7 @@ TEST_CASE("HMAC 'upstream' MAC generation from data", "[hw_crypto]")
{
uint8_t hmac[32];
setup_keyblock();
setup_keyblock(EFUSE_BLK_KEY4, ESP_EFUSE_KEY_PURPOSE_HMAC_UP);
// 257 characters of pseudo-Latin from lipsum.com (not Copyright)
const char *message = "Deleniti voluptas explicabo et assumenda. Sed et aliquid minus quis. Praesentium cupiditate quia nemo est. Laboriosam pariatur ut distinctio tenetur. Sunt architecto iure aspernatur soluta ut recusandae. Ut quibusdam occaecati ut qui sit dignissimos eaque..";
@@ -1005,7 +979,8 @@ TEST_CASE("HMAC 'upstream' wait lock", "[hw_crypto]")
// 257 characters of pseudo-Latin from lipsum.com (not Copyright)
const char *message = "Deleniti voluptas explicabo et assumenda. Sed et aliquid minus quis. Praesentium cupiditate quia nemo est. Laboriosam pariatur ut distinctio tenetur. Sunt architecto iure aspernatur soluta ut recusandae. Ut quibusdam occaecati ut qui sit dignissimos eaque..";
setup_keyblock();
setup_keyblock(EFUSE_BLK_KEY4, ESP_EFUSE_KEY_PURPOSE_HMAC_UP);
static const hmac_result results[] = {
{ .msglen = 255,
.result = { 0x59, 0x52, 0x50, 0x4, 0xb6, 0x28, 0xf9, 0x28, 0x7f, 0x6c, 0x37, 0xba, 0xfb, 0xb2, 0x58, 0xe7, 0xa, 0xac, 0x6c, 0x4a, 0xef, 0x66, 0x6, 0x7b, 0x1, 0x1f, 0x4c, 0xa4, 0xe5, 0xe5, 0x29, 0x5d },