Mercurial > dropbear
view libtommath/bn_mp_2expt.c @ 1921:284c3837891c
Allow user space file locations (rootless support)
Why:
Running dropbear as a user (rootless) is aided if
files and programs can be saved/removed without
needing sudo.
What:
Use the same convention as DROPBEAR_DEFAULT_CLI_AUTHKEY;
if not starting with '/', then is relative to hedge's /home/hedge:
*_PRIV_FILENAME
DROPBEAR_PIDFILE
SFTPSERVER_PATH
default_options.h commentary added.
Changes kept to a minimum, so log entry in svr_kex.c#163
is refactored.
From:
Generated hostkey is <path> ... <finger-print>
to:
Generated hostkey path is <path>
Generated hostkey fingerprint is <fp>
Otherwise the unexpanded path was reported.
Patch modified by Matt Johnston
Signed-off-by: Begley Brothers Inc <[email protected]>
author | Begley Brothers Inc <begleybrothers@gmail.com> |
---|---|
date | Thu, 09 Jul 2020 17:47:58 +1000 |
parents | 1051e4eea25a |
children |
line wrap: on
line source
#include "tommath_private.h" #ifdef BN_MP_2EXPT_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* computes a = 2**b * * Simple algorithm which zeroes the int, grows it then just sets one bit * as required. */ mp_err mp_2expt(mp_int *a, int b) { mp_err err; /* zero a as per default */ mp_zero(a); /* grow a to accomodate the single bit */ if ((err = mp_grow(a, (b / MP_DIGIT_BIT) + 1)) != MP_OKAY) { return err; } /* set the used count of where the bit will go */ a->used = (b / MP_DIGIT_BIT) + 1; /* put the single bit in its place */ a->dp[b / MP_DIGIT_BIT] = (mp_digit)1 << (mp_digit)(b % MP_DIGIT_BIT); return MP_OKAY; } #endif