Mercurial > dropbear
view libtommath/bn_mp_read_signed_bin.c @ 389:5ff8218bcee9
propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 2af95f00ebd5bb7a28b3817db1218442c935388e)
to branch 'au.asn.ucc.matt.dropbear' (head ecd779509ef23a8cdf64888904fc9b31d78aa933)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Thu, 11 Jan 2007 03:14:55 +0000 |
parents | eed26cff980b |
children | 60fc6476e044 |
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#include <tommath.h> #ifdef BN_MP_READ_SIGNED_BIN_C /* LibTomMath, multiple-precision integer library -- Tom St Denis * * LibTomMath is a library that provides multiple-precision * integer arithmetic as well as number theoretic functionality. * * The library was designed directly after the MPI library by * Michael Fromberger but has been written from scratch with * additional optimizations in place. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, [email protected], http://math.libtomcrypt.com */ /* read signed bin, big endian, first byte is 0==positive or 1==negative */ int mp_read_signed_bin (mp_int * a, const unsigned char *b, int c) { int res; /* read magnitude */ if ((res = mp_read_unsigned_bin (a, b + 1, c - 1)) != MP_OKAY) { return res; } /* first byte is 0 for positive, non-zero for negative */ if (b[0] == 0) { a->sign = MP_ZPOS; } else { a->sign = MP_NEG; } return MP_OKAY; } #endif /* $Source: /cvs/libtom/libtommath/bn_mp_read_signed_bin.c,v $ */ /* $Revision: 1.4 $ */ /* $Date: 2006/03/31 14:18:44 $ */