mirror of
http://galexander.org/git/simplesshd.git
synced 2024-11-30 19:28:10 +00:00
26 lines
635 B
C
26 lines
635 B
C
|
#include "tommath_private.h"
|
||
|
|
#ifdef BN_MP_FROM_SBIN_C
|
||
|
|
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
|
||
|
|
/* SPDX-License-Identifier: Unlicense */
|
||
|
|
|
||
|
|
/* read signed bin, big endian, first byte is 0==positive or 1==negative */
|
||
|
|
mp_err mp_from_sbin(mp_int *a, const unsigned char *buf, size_t size)
|
||
|
|
{
|
||
|
|
mp_err err;
|
||
|
|
|
||
|
|
/* read magnitude */
|
||
|
|
if ((err = mp_from_ubin(a, buf + 1, size - 1u)) != MP_OKAY) {
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* first byte is 0 for positive, non-zero for negative */
|
||
|
|
if (buf[0] == (unsigned char)0) {
|
||
|
|
a->sign = MP_ZPOS;
|
||
|
|
} else {
|
||
|
|
a->sign = MP_NEG;
|
||
|
|
}
|
||
|
|
|
||
|
|
return MP_OKAY;
|
||
|
|
}
|
||
|
|
#endif
|