Mercurial > dropbear
view libtommath/bn_mp_montgomery_calc_normalization.c @ 1227:5dde22e8a189
scp: Have `fatal()' append a newline to the message
Date: Wed, 4 Nov 2015 20:33:19 -0000
It would seem that it's standard practice not to include a newline in the message
text, but that results in poor formatting, as a shell's command line then begins
on the line of the error message itself.
This commit simply instructs `fatal()' to append a newline after the message,
which should be suitable behavior for all of the invocations I've come across.
author | Michael Witten <mfwitten@gmail.com> |
---|---|
date | Tue, 19 Jan 2016 00:23:19 +0800 |
parents | 5ff8218bcee9 |
children | 60fc6476e044 |
line wrap: on
line source
#include <tommath.h> #ifdef BN_MP_MONTGOMERY_CALC_NORMALIZATION_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 */ /* * shifts with subtractions when the result is greater than b. * * The method is slightly modified to shift B unconditionally upto just under * the leading bit of b. This saves alot of multiple precision shifting. */ int mp_montgomery_calc_normalization (mp_int * a, mp_int * b) { int x, bits, res; /* how many bits of last digit does b use */ bits = mp_count_bits (b) % DIGIT_BIT; if (b->used > 1) { if ((res = mp_2expt (a, (b->used - 1) * DIGIT_BIT + bits - 1)) != MP_OKAY) { return res; } } else { mp_set(a, 1); bits = 1; } /* now compute C = A * B mod b */ for (x = bits - 1; x < (int)DIGIT_BIT; x++) { if ((res = mp_mul_2 (a, a)) != MP_OKAY) { return res; } if (mp_cmp_mag (a, b) != MP_LT) { if ((res = s_mp_sub (a, b, a)) != MP_OKAY) { return res; } } } return MP_OKAY; } #endif /* $Source: /cvs/libtom/libtommath/bn_mp_montgomery_calc_normalization.c,v $ */ /* $Revision: 1.3 $ */ /* $Date: 2006/03/31 14:18:44 $ */