diff options
Diffstat (limited to 'common/rollback.c')
| -rw-r--r-- | common/rollback.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/common/rollback.c b/common/rollback.c index e530397af1..203a4cf6ec 100644 --- a/common/rollback.c +++ b/common/rollback.c @@ -200,17 +200,15 @@ static int add_entropy(uint8_t *dst, const uint8_t *src, const uint8_t *add, BUILD_ASSERT(SHA256_DIGEST_SIZE == CONFIG_ROLLBACK_SECRET_SIZE); struct sha256_ctx ctx; uint8_t *hash; -#ifdef CONFIG_ROLLBACK_SECRET_LOCAL_ENTROPY_SIZE - uint8_t extra; - int i; -#endif SHA256_init(&ctx); SHA256_update(&ctx, src, CONFIG_ROLLBACK_SECRET_SIZE); SHA256_update(&ctx, add, add_len); #ifdef CONFIG_ROLLBACK_SECRET_LOCAL_ENTROPY_SIZE /* Add some locally produced entropy */ - for (i = 0; i < CONFIG_ROLLBACK_SECRET_LOCAL_ENTROPY_SIZE; i++) { + for (int i = 0; i < CONFIG_ROLLBACK_SECRET_LOCAL_ENTROPY_SIZE; i++) { + uint8_t extra; + if (!board_get_entropy(&extra, 1)) goto failed; SHA256_update(&ctx, &extra, 1); |