wolfcrypt/src/sp_int.c: in _sp_exptmod_nct(), use 2 bit window if bits <= 21.

douzzer · douzzer · commit 2dfc7eee89f9 · 2025-08-07T10:26:34.000-05:00
diff --git a/wolfcrypt/src/sp_int.c b/wolfcrypt/src/sp_int.c
@@ -14208,7 +14208,7 @@ static int _sp_exptmod_nct(const sp_int* b, const sp_int* e, const sp_int* m,
         winBits = 6;
     }
     else if (bits <= 21) {
-        winBits = 1;
+        winBits = 2;
     }
     else if (bits <= 36) {
         winBits = 3;

Original file line number	Diff line number	Diff line change
`@@ -14208,7 +14208,7 @@ static int _sp_exptmod_nct(const sp_int* b, const sp_int* e, const sp_int* m,`
`14208`	`14208`	`winBits = 6;`
`14209`	`14209`	`}`
`14210`	`14210`	`else if (bits <= 21) {`
`14211`		`- winBits = 1;`
	`14211`	`+ winBits = 2;`
`14212`	`14212`	`}`
`14213`	`14213`	`else if (bits <= 36) {`
`14214`	`14214`	`winBits = 3;`