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Diffstat (limited to 'masterkey.c')
-rw-r--r--masterkey.c48
1 files changed, 22 insertions, 26 deletions
diff --git a/masterkey.c b/masterkey.c
index ffae618..3c4f0d3 100644
--- a/masterkey.c
+++ b/masterkey.c
@@ -89,22 +89,19 @@ hal_error_t masterkey_volatile_init()
return HAL_ERROR_CORE_NOT_FOUND;
}
- err =
- hal_mkmif_set_clockspeed(core, MKM_VOLATILE_SCLK_DIV) ||
- hal_mkmif_init(core) ||
- hal_mkmif_read_word(core, MKM_VOLATILE_STATUS_ADDRESS, &status);
-
- if (err != LIBHAL_OK) return err;
+ if ((err = hal_mkmif_set_clockspeed(core, MKM_VOLATILE_SCLK_DIV)) != LIBHAL_OK ||
+ (err = hal_mkmif_init(core)) != LIBHAL_OK ||
+ (err = hal_mkmif_read_word(core, MKM_VOLATILE_STATUS_ADDRESS, &status)) != LIBHAL_OK)
+ return err;
if (status != MKM_STATUS_SET && status != MKM_STATUS_NOT_SET) {
/* XXX Something is a bit fishy here. If we just write the status word, it reads back wrong sometimes,
* while if we write the full buf too it is consistently right afterwards.
*/
uint8_t buf[KEK_LENGTH] = {0};
- err =
- hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, sizeof(buf)) ||
- hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_NOT_SET);
- if (err != LIBHAL_OK) return err;
+ if ((err = hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, sizeof(buf))) != LIBHAL_OK ||
+ (err = hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_NOT_SET)) != LIBHAL_OK)
+ return err;
}
volatile_init = 1;
@@ -119,11 +116,9 @@ hal_error_t masterkey_volatile_read(uint8_t *buf, size_t len)
if (len && len != KEK_LENGTH) return HAL_ERROR_MASTERKEY_BAD_LENGTH;
- err =
- masterkey_volatile_init() ||
- hal_mkmif_read_word(core, MKM_VOLATILE_STATUS_ADDRESS, &status);
-
- if (err != LIBHAL_OK) return err;
+ if ((err = masterkey_volatile_init()) != LIBHAL_OK ||
+ (err = hal_mkmif_read_word(core, MKM_VOLATILE_STATUS_ADDRESS, &status)) != LIBHAL_OK)
+ return err;
if (buf != NULL && len) {
/* Don't return the random bytes in the RAM memory in case it isn't initialized.
@@ -151,12 +146,12 @@ hal_error_t masterkey_volatile_write(uint8_t *buf, size_t len)
if (len != KEK_LENGTH) return HAL_ERROR_MASTERKEY_BAD_LENGTH;
if (! buf) return HAL_ERROR_MASTERKEY_FAIL;
- err =
- masterkey_volatile_init() ||
- hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, len) ||
- hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_SET);
+ if ((err = masterkey_volatile_init()) != LIBHAL_OK ||
+ (err = hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, len)) != LIBHAL_OK ||
+ (err = hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_SET)) != LIBHAL_OK)
+ return err;
- return err;
+ return LIBHAL_OK;
}
hal_error_t masterkey_volatile_erase(size_t len)
@@ -166,12 +161,12 @@ hal_error_t masterkey_volatile_erase(size_t len)
if (len != KEK_LENGTH) return HAL_ERROR_MASTERKEY_BAD_LENGTH;
- err =
- masterkey_volatile_init() ||
- hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, sizeof(buf)) ||
- hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_NOT_SET);
+ if ((err = masterkey_volatile_init()) != LIBHAL_OK ||
+ (err = hal_mkmif_write(core, MKM_VOLATILE_STATUS_ADDRESS + 4, buf, sizeof(buf))) != LIBHAL_OK ||
+ (err = hal_mkmif_write_word(core, MKM_VOLATILE_STATUS_ADDRESS, MKM_STATUS_NOT_SET)) != LIBHAL_OK)
+ return err;
- return err;
+ return LIBHAL_OK;
}
hal_error_t masterkey_flash_init()
@@ -187,10 +182,11 @@ hal_error_t masterkey_flash_read(uint8_t *buf, size_t len)
{
uint8_t page[KEYSTORE_PAGE_SIZE];
uint32_t *status = (uint32_t *) page;
+ hal_error_t err;
if (len && len != KEK_LENGTH) return HAL_ERROR_MASTERKEY_BAD_LENGTH;
- if (masterkey_flash_init() != LIBHAL_OK) return HAL_ERROR_MASTERKEY_FAIL;
+ if ((err = masterkey_flash_init()) != LIBHAL_OK) return err;
if (! keystore_read_data(MKM_FLASH_STATUS_ADDRESS, page, sizeof(page))) {
memset(page, 0, sizeof(page));