| commit | c1a17f5458d283aea82aef5f5e2353bc37eed060 | [log] [tgz] |
|---|---|---|
| author | Dave Rodgman <dave.rodgman@arm.com> | Wed Sep 20 14:54:29 2023 +0100 |
| committer | Dave Rodgman <dave.rodgman@arm.com> | Wed Sep 20 15:14:28 2023 +0100 |
| tree | d2bcd0878b63504caa6c5b9dddfbe89fc9d92a6b | |
| parent | 51773aa68b497d7f3411e8370803927b4e997b3b [diff] [blame] |
CT fix for get_zeros_padding Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/cipher.c b/library/cipher.c index 6853fb8..5470dcf 100644 --- a/library/cipher.c +++ b/library/cipher.c
@@ -879,7 +879,8 @@ for (i = input_len; i > 0; i--) { prev_done = done; done |= (input[i-1] != 0); - *data_len |= i * (done != prev_done); + size_t mask = mbedtls_ct_size_mask(done ^ prev_done); + *data_len |= i & mask; } return 0;