eden-emu/mbedtls
15
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Use CT interface in get_zeros_padding

Browse source 
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-09-19 16:19:38 +01:00
parent 1cfc43c77b
commit d8c68a948a
1 changed files with 3 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

6
library/cipher.c
View file

@ -983,7 +983,7 @@ static int get_zeros_padding(unsigned char *input, size_t input_len,
size_t *data_len) size_t *data_len)
{ {
size_t i; size_t i;
unsigned char done = 0, prev_done; mbedtls_ct_condition_t done = MBEDTLS_CT_FALSE, prev_done;
if (NULL == input || NULL == data_len) { if (NULL == input || NULL == data_len) {
return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA; return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
@ -992,8 +992,8 @@ static int get_zeros_padding(unsigned char *input, size_t input_len,
*data_len = 0; *data_len = 0;
for (i = input_len; i > 0; i--) { for (i = input_len; i > 0; i--) {
prev_done = done; prev_done = done;
done |= (input[i-1] != 0); done = mbedtls_ct_bool_or(done, mbedtls_ct_uint_ne(input[i-1], 0));
*data_len |= i * (done != prev_done); *data_len = mbedtls_ct_size_if(mbedtls_ct_bool_ne(done, prev_done), i, *data_len);
} }
return 0; return 0;