Mercurial > dropbear
view libtomcrypt/build.sh @ 1790:42745af83b7d
Introduce extra delay before closing unauthenticated sessions
To make it harder for attackers, introduce a delay to keep an
unauthenticated session open a bit longer, thus blocking a connection
slot until after the delay.
Without this, while there is a limit on the amount of attempts an attacker
can make at the same time (MAX_UNAUTH_PER_IP), the time taken by dropbear to
handle one attempt is still short and thus for each of the allowed parallel
attempts many attempts can be chained one after the other. The attempt rate
is then:
"MAX_UNAUTH_PER_IP / <process time of one attempt>".
With the delay, this rate becomes:
"MAX_UNAUTH_PER_IP / UNAUTH_CLOSE_DELAY".
author | Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> |
---|---|
date | Wed, 15 Feb 2017 13:53:04 +0100 |
parents | 6dba84798cd5 |
children |
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#!/bin/bash echo "$1 ($2, $3)..." make clean 1>/dev/null 2>/dev/null echo -n "building..." if [ -f /proc/cpuinfo ] then MAKE_JOBS=$(( ($(cat /proc/cpuinfo | grep -E '^processor[[:space:]]*:' | tail -n -1 | cut -d':' -f2) + 1) * 2 + 1 )) else MAKE_JOBS=8 fi CFLAGS="$2 $CFLAGS $4" EXTRALIBS="$5" make -j$MAKE_JOBS -f $3 all_test 1>gcc_1.txt 2>gcc_2.txt mret=$? cnt=$(wc -l < gcc_2.txt) # ignore 1 line since ar prints to stderr instead of stdout and ar is called for # $(LIBNAME) if [[ $mret -ne 0 ]] || [[ $cnt -gt 1 ]]; then echo "build $1 failed! printing gcc_2.txt now for convenience" cat gcc_2.txt exit 1 fi echo -n "testing..." if [ -a test ] && [ -f test ] && [ -x test ]; then ((./test >test_std.txt 2>test_err.txt && ./tv_gen > tv.txt) && echo "$1 test passed." && echo "y" > testok.txt) || (echo "$1 test failed, look at test_err.txt or tv.txt" && exit 1) if find *_tv.txt -type f 1>/dev/null 2>/dev/null ; then for f in *_tv.txt; do # check for lines starting with '<' ($f might be a subset of notes/$f) difftroubles=$(diff -i -w -B $f notes/$f | grep '^<') if [ -n "$difftroubles" ]; then echo "FAILURE: $f" diff -i -w -B $f notes/$f echo "tv_gen $f failed" && rm -f testok.txt && exit 1 else true fi done fi fi if [ -a testok.txt ] && [ -f testok.txt ]; then if [ "$LTC_COVERAGE" != "" ]; then ./coverage_more.sh > test_coverage_more.txt || exit 1 lcov_opts="--capture --no-external --directory src -q" lcov_out=$(echo coverage_$1_$2_$3 | tr ' -=+' '_')".info" lcov $lcov_opts --output-file $lcov_out fi exit 0 fi exit 1 # ref: $Format:%D$ # git commit: $Format:%H$ # commit time: $Format:%ai$