wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2025-07-31 19:24:42 +02:00
Code Issues Packages Projects Releases Wiki Activity

check size of values with sp_gcd

Browse Source
This commit is contained in:
Jacob Barthelmeh
2021-11-03 11:49:28 -06:00
parent d24bfb6bf7
commit ca72beb688
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
wolfcrypt/src/sp_int.c
View File

@@ -13450,7 +13450,7 @@ int sp_prime_is_prime_ex(sp_int* a, int t, int* result, WC_RNG* rng)
* @param [out] r SP integer to hold result.
*
* @return MP_OKAY on success.
* @return MP_VAL when a, b or r is NULL.
* @return MP_VAL when a, b or r is NULL or too large.
* @return MP_MEM when dynamic memory allocation fails.
*/
int sp_gcd(sp_int* a, sp_int* b, sp_int* r)
@@ -13460,6 +13460,9 @@ int sp_gcd(sp_int* a, sp_int* b, sp_int* r)
if ((a == NULL) || (b == NULL) || (r == NULL)) {
err = MP_VAL;
}
else if (a->used >= SP_INT_DIGITS || b->used >= SP_INT_DIGITS) {
err = MP_VAL;
}
else if (sp_iszero(a)) {
/* GCD of 0 and 0 is undefined as all integers divide 0. */
if (sp_iszero(b)) {
@@ -13482,6 +13485,7 @@ int sp_gcd(sp_int* a, sp_int* b, sp_int* r)
SAVE_VECTOR_REGISTERS(err = _svr_ret;);
ALLOC_SP_INT_ARRAY(d, used, 3, err, NULL);
if (err == MP_OKAY) {
u = d[0];
v = d[1];