Added TinySSH test.

This commit is contained in:
Joe Testa 2019-08-27 22:28:24 -04:00
parent 747177c1c7
commit 7221413567
5 changed files with 132 additions and 18 deletions

View File

@ -15,7 +15,7 @@
# This is the docker tag for the image. If this tag doesn't exist, then we assume the
# image is out of date, and generate a new one with this tag.
IMAGE_VERSION=2
IMAGE_VERSION=3
# This is the name of our docker image.
IMAGE_NAME=ssh-audit-test
@ -48,6 +48,14 @@ function compile_openssh {
compile 'OpenSSH' $version
}
# Uncompresses and compiles the specified version of TinySSH.
function compile_tinyssh {
version=$1
compile 'TinySSH' $version
}
function compile {
project=$1
version=$2
@ -66,6 +74,11 @@ function compile {
uncompress_options="xjf"
source_dir="dropbear-${version}"
server_executable=dropbear
elif [[ $project == 'TinySSH' ]]; then
tarball="${version}.tar.gz"
uncompress_options="xzf"
source_dir="tinyssh-${version}"
server_executable='build/bin/tinysshd'
fi
echo "Uncompressing ${project} ${version}..."
@ -73,7 +86,13 @@ function compile {
echo "Compiling ${project} ${version}..."
pushd $source_dir > /dev/null
# TinySSH has no configure script... only a Makefile.
if [[ $project == 'TinySSH' ]]; then
make -j 10
else
./configure && make -j 10
fi
if [[ ! -f $server_executable ]]; then
echo -e "${REDB}Error: ${server_executable} not built!${CLR}"
@ -90,16 +109,17 @@ function create_docker_image {
# Create a new temporary directory.
TMP_DIR=`mktemp -d /tmp/sshaudit-docker-XXXXXXXXXX`
# Copy the Dockerfile to our new temp directory.
cp test/docker/* $TMP_DIR
# Copy the Dockerfile and all files in the test/docker/ dir to our new temp directory.
find test/docker/ -maxdepth 1 -type f | xargs cp -t $TMP_DIR
# Make the temp directory our working directory for the duration of the build
# process.
pushd $TMP_DIR > /dev/null
# Get the release key for OpenSSH.
get_openssh_release_key
# Get the release keys.
get_dropbear_release_key
get_openssh_release_key
get_tinyssh_release_key
# Aside from checking the GPG signatures, we also compare against this known-good
# SHA-256 hash just in case.
@ -107,6 +127,7 @@ function create_docker_image {
get_openssh '5.6p1' '538af53b2b8162c21a293bb004ae2bdb141abd250f61b4cea55244749f3c6c2b'
get_openssh '8.0p1' 'bd943879e69498e8031eb6b7f44d08cdc37d59a7ab689aa0b437320c3481fd68'
get_dropbear '2019.78' '525965971272270995364a0eb01f35180d793182e63dd0b0c3eb0292291644a4'
get_tinyssh '20190101' '554a9a94e53b370f0cd0c5fbbd322c34d1f695cbcea6a6a32dcb8c9f595b3fea'
# Compile the versions of OpenSSH.
compile_openssh '4.0p1'
@ -116,6 +137,9 @@ function create_docker_image {
# Compile the versions of Dropbear.
compile_dropbear '2019.78'
# Compile the versions of TinySSH.
compile_tinyssh '20190101'
# Rename the default config files so we know they are our originals.
mv openssh-4.0p1/sshd_config sshd_config-4.0p1_orig
@ -199,12 +223,22 @@ function get_openssh_release_key {
}
# Downloads the TinySSH release key and adds it to the local keyring.
function get_tinyssh_release_key {
get_release_key 'TinySSH' '' '96939FF9' 'AADF 2EDF 5529 F170 2772 C8A2 DEC4 D246 931E F49B'
}
function get_release_key {
project=$1
key_url=$2
key_id=$3
release_key_fingerprint_expected=$4
# The TinySSH release key isn't on any website, apparently.
if [[ $project == 'TinySSH' ]]; then
gpg --recv-key $key_id
else
echo -e "\nGetting ${project} release key...\n"
wget -O key.asc $2
@ -212,6 +246,7 @@ function get_release_key {
gpg --import key.asc
rm key.asc
fi
local release_key_fingerprint_actual=`gpg --fingerprint ${key_id}`
if [[ $release_key_fingerprint_actual != *"$release_key_fingerprint_expected"* ]]; then
@ -238,37 +273,54 @@ function get_openssh {
}
# Downloads the specified version of TinySSH.
function get_tinyssh {
version=$1
tarball_checksum_expected=$2
get_source 'TinySSH' $version $tarball_checksum_expected
}
function get_source {
project=$1
version=$2
tarball_checksum_expected=$3
base_url=
base_url_source=
base_url_sig=
tarball=
sig=
signer=
if [[ $project == 'OpenSSH' ]]; then
base_url='https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/'
base_url_source='https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/'
base_url_sig=$base_url_source
tarball="openssh-${version}.tar.gz"
sig="${tarball}.asc"
signer="Damien Miller "
elif [[ $project == 'Dropbear' ]]; then
base_url='https://matt.ucc.asn.au/dropbear/releases/'
base_url_source='https://matt.ucc.asn.au/dropbear/releases/'
base_url_sig=$base_url_source
tarball="dropbear-${version}.tar.bz2"
sig="${tarball}.asc"
signer="Dropbear SSH Release Signing <matt@ucc.asn.au>"
elif [[ $project == 'TinySSH' ]]; then
base_url_source='https://github.com/janmojzis/tinyssh/archive/'
base_url_sig="https://github.com/janmojzis/tinyssh/releases/download/${version}/"
tarball="${version}.tar.gz"
sig="${tarball}.asc"
signer="Jan Mojžíš <jan.mojzis@gmail.com>"
fi
echo -e "\nGetting ${project} ${version} sources...\n"
wget "${base_url}${tarball}"
wget "${base_url_source}${tarball}"
echo -e "\nGetting ${project} ${version} signature...\n"
wget "${base_url}${sig}"
wget "${base_url_sig}${sig}"
# Older OpenSSH releases were .sigs.
if [[ ($project == 'OpenSSH') && (! -f $sig) ]]; then
wget ${base_url}openssh-${version}.tar.gz.sig
wget ${base_url_sig}openssh-${version}.tar.gz.sig
sig=openssh-${version}.tar.gz.sig
fi
@ -316,6 +368,16 @@ function run_openssh_test {
}
# Runs a TinySSH test. Upon failure, a diff between the expected and actual results
# is shown, then the script immediately terminates.
function run_tinyssh_test {
tinyssh_version=$1
test_number=$2
run_test 'TinySSH' $tinyssh_version $test_number ''
}
function run_test {
server_type=$1
version=$2
@ -337,6 +399,11 @@ function run_test {
test_result="${TEST_RESULT_DIR}/dropbear_${version}_${test_number}.txt"
expected_result="test/docker/expected_results/dropbear_${version}_${test_number}.txt"
test_name="Dropbear ${version} ${test_number}"
elif [[ $server_type == 'TinySSH' ]]; then
server_exec="/usr/bin/tcpserver -HRDl0 0.0.0.0 22 /tinysshd/tinyssh-20190101 -v /etc/tinyssh/"
test_result="${TEST_RESULT_DIR}/tinyssh_${version}_${test_number}.txt"
expected_result="test/docker/expected_results/tinyssh_${version}_${test_number}.txt"
test_name="TinySSH ${version} ${test_number}"
fi
cid=`docker run -d -p 2222:22 ${IMAGE_NAME}:${IMAGE_VERSION} ${server_exec}`
@ -358,6 +425,14 @@ function run_test {
exit 1
fi
# TinySSH outputs a random string in each banner, which breaks our test. So
# we need to filter out the banner part of the output so we get stable, repeatable
# results.
if [[ $server_type == 'TinySSH' ]]; then
grep -v "(gen) banner: " ${test_result} > "${test_result}.tmp"
mv "${test_result}.tmp" ${test_result}
fi
diff=`diff -u ${expected_result} ${test_result}`
if [[ $? == 0 ]]; then
echo -e "${test_name} ${GREEN}passed${CLR}."
@ -404,6 +479,8 @@ run_openssh_test '8.0p1' 'test2'
run_openssh_test '8.0p1' 'test3'
echo
run_dropbear_test '2019.78' 'test1' '-r /etc/dropbear/dropbear_rsa_host_key_1024 -r /etc/dropbear/dropbear_dss_host_key -r /etc/dropbear/dropbear_ecdsa_host_key'
echo
run_tinyssh_test '20190101' 'test1'
# The test functions above will terminate the script on failure, so if we reached here,
# all tests are successful.

1
test/docker/.ed25519.sk Normal file
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@ -0,0 +1 @@
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@ -4,17 +4,27 @@ COPY openssh-4.0p1/sshd /openssh/sshd-4.0p1
COPY openssh-5.6p1/sshd /openssh/sshd-5.6p1
COPY openssh-8.0p1/sshd /openssh/sshd-8.0p1
COPY dropbear-2019.78/dropbear /dropbear/dropbear-2019.78
COPY tinyssh-20190101/build/bin/tinysshd /tinysshd/tinyssh-20190101
# Dropbear host keys.
COPY dropbear_*_host_key* /etc/dropbear/
# OpenSSH configs.
COPY sshd_config* /etc/ssh/
# OpenSSH host keys & moduli file.
COPY ssh_host_* /etc/ssh/
COPY ssh1_host_* /etc/ssh/
COPY moduli_1024 /usr/local/etc/moduli
# TinySSH host keys.
COPY ed25519.pk /etc/tinyssh/
COPY .ed25519.sk /etc/tinyssh/
COPY debug.sh /debug.sh
RUN apt update 2> /dev/null
RUN apt install -y libssl-dev strace rsyslog 2> /dev/null
RUN apt install -y libssl-dev strace rsyslog ucspi-tcp 2> /dev/null
RUN apt clean 2> /dev/null
RUN useradd -s /bin/false sshd
RUN mkdir /var/empty

1
test/docker/ed25519.pk Normal file
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@ -0,0 +1 @@
1vu}¢ï„JòÝ·ŸŠ"à^Bb&U‰ìP«<50> CJ?

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@ -0,0 +1,25 @@
# general
(gen) software: TinySSH noversion
(gen) compatibility: OpenSSH 8.0+, Dropbear SSH 2013.62+
(gen) compression: disabled
# key exchange algorithms
(kex) curve25519-sha256 -- [info] available since OpenSSH 7.4
(kex) curve25519-sha256@libssh.org -- [info] available since OpenSSH 6.5, Dropbear SSH 2013.62
(kex) sntrup4591761x25519-sha512@tinyssh.org -- [warn] using experimental algorithm
`- [info] available since OpenSSH 8.0
# host-key algorithms
(key) ssh-ed25519 -- [info] available since OpenSSH 6.5
# encryption algorithms (ciphers)
(enc) chacha20-poly1305@openssh.com -- [info] available since OpenSSH 6.5
`- [info] default cipher since OpenSSH 6.9.
# message authentication code algorithms
(mac) hmac-sha2-256 -- [warn] using encrypt-and-MAC mode
`- [info] available since OpenSSH 5.9, Dropbear SSH 2013.56
# fingerprints
(fin) ssh-ed25519: SHA256:89ocln1x7KNqnMgWffGoYtD70ksJ4FrH7BMJHa7SrwU