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SIZE_MAX doesn't exist everywhere, supply an alternative

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SIZE_MAX is a great macro, and does unfortunately not exist everywhere.
Since we check against half of it, using bitwise shift to calculate the
value of half SIZE_MAX should be safe enough.

Reviewed-by: Tim Hudson <tjh@openssl.org>
This commit is contained in:
Richard Levitte 2015-12-30 14:56:59 +01:00
parent 3dc9589cc8
commit 36830ecac7
1 changed files with 5 additions and 0 deletions
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5
ssl/packet_locl.h
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@ -111,8 +111,13 @@ __owur static ossl_inline int PACKET_buf_init(PACKET *pkt, unsigned char *buf,
size_t len) size_t len)
{ {
/* Sanity check for negative values. */ /* Sanity check for negative values. */
#ifdef SIZE_MAX
if (len > (size_t)(SIZE_MAX / 2)) if (len > (size_t)(SIZE_MAX / 2))
return 0; return 0;
#else
if (len > ((size_t)2 << (sizeof(size_t) * 8 - 1)))
return 0;
#endif
pkt->curr = buf; pkt->curr = buf;
pkt->remaining = len; pkt->remaining = len;