view libtommath/bn_mp_pack_count.c @ 1705:5b701bf529aa

Fix ChaCha20 on 32-bit platforms (#99) * Fix ChaCha20 on 32-bit platforms On 32-bit platforms with old compiler STORE64H() parameter is not auto-expanded to 64-bit value, causing wrong IV data. Spotted on BCM4706 MIPS32r2 with GCC 4.2.4: Exit before auth: Integrity error (bad packet size 2065808956) * Fix Chacha20-Poly1305 and AES-GCM debug messages Functions were renamed earlier and trace messages - not.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Fri, 29 May 2020 18:26:22 +0500
parents 1051e4eea25a
children
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#include "tommath_private.h"
#ifdef BN_MP_PACK_COUNT_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

size_t mp_pack_count(const mp_int *a, size_t nails, size_t size)
{
   size_t bits = (size_t)mp_count_bits(a);
   return ((bits / ((size * 8u) - nails)) + (((bits % ((size * 8u) - nails)) != 0u) ? 1u : 0u));
}

#endif