Mercurial > dropbear
view libtommath/bn_mp_rand.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 | 34d9d3c022ce |
children |
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line source
#include "tommath_private.h" #ifdef BN_MP_RAND_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* Dropbear sets this separately, avoid platform code */ mp_err(*s_mp_rand_source)(void *out, size_t size) = NULL; void mp_rand_source(mp_err(*source)(void *out, size_t size)) { /* Dropbear, don't reset to platform if source==NULL */ s_mp_rand_source = source; } mp_err mp_rand(mp_int *a, int digits) { int i; mp_err err; mp_zero(a); if (digits <= 0) { return MP_OKAY; } if ((err = mp_grow(a, digits)) != MP_OKAY) { return err; } if ((err = s_mp_rand_source(a->dp, (size_t)digits * sizeof(mp_digit))) != MP_OKAY) { return err; } /* TODO: We ensure that the highest digit is nonzero. Should this be removed? */ while ((a->dp[digits - 1] & MP_MASK) == 0u) { if ((err = s_mp_rand_source(a->dp + digits - 1, sizeof(mp_digit))) != MP_OKAY) { return err; } } a->used = digits; for (i = 0; i < digits; ++i) { a->dp[i] &= MP_MASK; } return MP_OKAY; } #endif