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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

if [ $# -lt 3 ]
then
  echo "usage is: ${0##*/} <which makefile and other make options> <additional defines> <path to math provider>"
  echo "e.g. \"${0##*/} \"makefile -j9\" \"-DUSE_LTM -DLTM_DESC -I../libtommath\" ../libtommath/libtommath.a\""
  echo "to create aggregate coverage: pre-pend with LTC_COVERAGE=1"
  exit -1
fi

# date
echo "date="`date`

# check sources
bash check_source.sh "CHECK_SOURCES" " " "$1" "$2" "$3" || exit 1

mk="$1"

[ "$LTC_COVERAGE" != "" ] && mk="$mk COVERAGE=1"

# stock build
bash run.sh "STOCK" " " "$mk" "$2" "$3" || exit 1

# EASY build
bash run.sh "EASY" "-DLTC_EASY" "$mk" "$2" "$3" || exit 1

# SMALL code
bash run.sh "SMALL" "-DLTC_SMALL_CODE" "$mk" "$2" "$3" || exit 1

# NOTABLES
bash run.sh "NOTABLES" "-DLTC_NO_TABLES" "$mk" "$2" "$3" || exit 1

# SMALL+NOTABLES
bash run.sh "SMALL+NOTABLES" "-DLTC_SMALL_CODE -DLTC_NO_TABLES" "$mk" "$2" "$3" || exit 1

# CLEANSTACK
bash run.sh "CLEANSTACK" "-DLTC_CLEAN_STACK" "$mk" "$2" "$3" || exit 1

# CLEANSTACK + SMALL
bash run.sh "CLEANSTACK+SMALL" "-DLTC_SMALL_CODE -DLTC_CLEAN_STACK" "$mk" "$2" "$3" || exit 1

# CLEANSTACK + NOTABLES
bash run.sh "CLEANSTACK+NOTABLES" "-DLTC_NO_TABLES -DLTC_CLEAN_STACK" "$mk" "$2" "$3" || exit 1

# CLEANSTACK + NOTABLES + SMALL
bash run.sh "CLEANSTACK+NOTABLES+SMALL" "-DLTC_NO_TABLES -DLTC_CLEAN_STACK -DLTC_SMALL_CODE" "$mk" "$2" "$3" || exit 1

# NO_FAST
bash run.sh "NO_FAST" "-DLTC_NO_FAST" "$mk" "$2" "$3" || exit 1

# NO_FAST + NOTABLES
bash run.sh "NO_FAST+NOTABLES" "-DLTC_NO_FAST -DLTC_NO_TABLES" "$mk" "$2" "$3" || exit 1

# NO_ASM
bash run.sh "NO_ASM" "-DLTC_NO_ASM" "$mk" "$2" "$3" || exit 1

# NO_TIMING_RESISTANCE
bash run.sh "NO_TIMING_RESISTANCE" "-DLTC_NO_ECC_TIMING_RESISTANT -DLTC_NO_RSA_BLINDING" "$mk" "$2" "$3" || exit 1

# CLEANSTACK+NOTABLES+SMALL+NO_ASM+NO_TIMING_RESISTANCE
bash run.sh "CLEANSTACK+NOTABLES+SMALL+NO_ASM+NO_TIMING_RESISTANCE" "-DLTC_CLEAN_STACK -DLTC_NO_TABLES -DLTC_SMALL_CODE -DLTC_NO_ECC_TIMING_RESISTANT -DLTC_NO_RSA_BLINDING" "$mk" "$2" "$3" || exit 1

# test build with no testing
bash testbuild.sh "NOTEST" "-DLTC_NO_TEST" "$mk" "$2" "$3" || exit 1

# test build with no file routines
bash testbuild.sh "NOFILE" "-DLTC_NO_FILE" "$mk" "$2" "$3" || exit 1

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# git commit:  $Format:%H$
# commit time: $Format:%ai$