Mercurial > dropbear
diff bn_mp_clear.c @ 283:bd240aa12ba7 libtommath-dropbear
* Changes imported from Dropbear 0.47.
* bn_mp_clear.c is changed so that some vars are volatile,
so that the compiler won't optimise away
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 08 Mar 2006 13:22:52 +0000 |
| parents | 91fbc376f010 |
| children | 4663ced4968f |
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--- a/bn_mp_clear.c Wed Mar 08 13:16:18 2006 +0000 +++ b/bn_mp_clear.c Wed Mar 08 13:22:52 2006 +0000 @@ -19,14 +19,17 @@ void mp_clear (mp_int * a) { - int i; + volatile mp_digit *p; + int len; /* only do anything if a hasn't been freed previously */ if (a->dp != NULL) { /* first zero the digits */ - for (i = 0; i < a->used; i++) { - a->dp[i] = 0; - } + len = a->alloc; + p = a->dp; + while (len--) { + *p++ = 0; + } /* free ram */ XFREE(a->dp);