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Optimized OPENSSL_cleanse [from HEAD].

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This commit is contained in:
Andy Polyakov
2007-07-23 16:10:06 +00:00
parent 80106dc5fb
commit cd5ab329f2
1 changed files with 7 additions and 5 deletions
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12
crypto/mem_clr.c
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@@ -64,12 +64,14 @@ unsigned char cleanse_ctr = 0;
void OPENSSL_cleanse(void *ptr, size_t len) void OPENSSL_cleanse(void *ptr, size_t len)
{ {
unsigned char *p = ptr; unsigned char *p = ptr;
size_t loop = len; size_t loop = len, ctr = cleanse_ctr;
while(loop--) while(loop--)
{ {
*(p++) = cleanse_ctr; *(p++) = (unsigned char)ctr;
cleanse_ctr += (17 + (unsigned char)((unsigned long)p & 0xF)); ctr += (17 + ((size_t)p & 0xF));
} }
if(memchr(ptr, cleanse_ctr, len)) p=memchr(ptr, (unsigned char)ctr, len);
cleanse_ctr += 63; if(p)
ctr += (63 + (size_t)p);
cleanse_ctr = (unsigned char)ctr;
} }