feedc0de/wolfssl
1
0
Fork 0
forked from wolfSSL/wolfssl
Code Pull Requests Activity

sp_int.c: fix refactor of undefined-semantics shift in _sp_mul().

Browse Source
This commit is contained in:
Daniel Pouzzner
2022-06-24 18:04:51 -05:00
parent 790584113f
commit 9211825121
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
wolfcrypt/src/sp_int.c
View File

@@ -7277,7 +7277,7 @@ static int _sp_mul(sp_int* a, sp_int* b, sp_int* r)
#endif #endif
for (k = 1; k <= (a->used - 1) + (b->used - 1); k++) { for (k = 1; k <= (a->used - 1) + (b->used - 1); k++) {
i = k - (b->used - 1); i = k - (b->used - 1);
i &= ~((unsigned int)i >> (sizeof(i) * 8 - 1)); i &= (((unsigned int)i >> (sizeof(i) * 8 - 1)) - 1U);
j = k - i; j = k - i;
for (; (i < a->used) && (j >= 0); i++, j--) { for (; (i < a->used) && (j >= 0); i++, j--) {
w = (sp_int_word)a->dp[i] * b->dp[j]; w = (sp_int_word)a->dp[i] * b->dp[j];