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Added Dropbear test.

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This commit is contained in:
Joe Testa
2019-08-26 14:45:31 -04:00
parent 0b034b8226
commit 120f898539
7 changed files with 251 additions and 39 deletions
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206
docker_test.sh
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@ -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# image is out of date, and generate a new one with this tag.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=1
IMAGE_VERSION=2
# This is the name of our docker image.
IMAGE_NAME=ssh-audit-test
@ -35,21 +35,52 @@ function check_if_docker_image_exists {
}
# Uncompresses and compiles the specified version of Dropbear.
function compile_dropbear {
version=$1
compile 'Dropbear' $version
}
# Uncompresses and compiles the specified version of OpenSSH.
function compile_openssh {
echo "Uncompressing $1..."
tar xzf openssh-$1.tar.gz
version=$1
compile 'OpenSSH' $version
}
echo "Compiling $1..."
pushd openssh-$1 > /dev/null
function compile {
project=$1
version=$2
tarball=
uncompress_options=
source_dir=
server_executable=
if [[ $project == 'OpenSSH' ]]; then
tarball="openssh-${version}.tar.gz"
uncompress_options="xzf"
source_dir="openssh-${version}"
server_executable=sshd
elif [[ $project == 'Dropbear' ]]; then
tarball="dropbear-${version}.tar.bz2"
uncompress_options="xjf"
source_dir="dropbear-${version}"
server_executable=dropbear
fi
echo "Uncompressing ${project} ${version}..."
tar $uncompress_options $tarball
echo "Compiling ${project} ${version}..."
pushd $source_dir > /dev/null
./configure && make -j 10
if [[ ! -f "sshd" ]]; then
echo -e "${REDB}Error: sshd not built!${CLR}"
if [[ ! -f $server_executable ]]; then
echo -e "${REDB}Error: ${server_executable} not built!${CLR}"
exit 1
fi
echo -e "\n${GREEN}Successfully built OpenSSH ${1}${CLR}\n"
echo -e "\n${GREEN}Successfully built ${project} ${version}${CLR}\n"
popd > /dev/null
}
@ -68,18 +99,24 @@ function create_docker_image {
# Get the release key for OpenSSH.
get_openssh_release_key
get_dropbear_release_key
# Aside from checking the GPG signatures, we also compare against this known-good
# SHA-256 hash just in case.
get_openssh '4.0p1' '5adb9b2c2002650e15216bf94ed9db9541d9a17c96fcd876784861a8890bc92b'
get_openssh '5.6p1' '538af53b2b8162c21a293bb004ae2bdb141abd250f61b4cea55244749f3c6c2b'
get_openssh '8.0p1' 'bd943879e69498e8031eb6b7f44d08cdc37d59a7ab689aa0b437320c3481fd68'
get_dropbear '2019.78' '525965971272270995364a0eb01f35180d793182e63dd0b0c3eb0292291644a4'
# Compile the versions of OpenSSH.
compile_openssh '4.0p1'
compile_openssh '5.6p1'
compile_openssh '8.0p1'
# Compile the versions of Dropbear.
compile_dropbear '2019.78'
# Rename the default config files so we know they are our originals.
mv openssh-4.0p1/sshd_config sshd_config-4.0p1_orig
mv openssh-5.6p1/sshd_config sshd_config-5.6p1_orig
@ -150,61 +187,122 @@ function create_openssh_config {
}
# Downloads the Dropbear release key and adds it to the local keyring.
function get_dropbear_release_key {
get_release_key 'Dropbear' 'https://matt.ucc.asn.au/dropbear/releases/dropbear-key-2015.asc' 'F29C6773' 'F734 7EF2 EE2E 07A2 6762 8CA9 4493 1494 F29C 6773'
}
# Downloads the OpenSSH release key and adds it to the local keyring.
function get_openssh_release_key {
local release_key_fingerprint_expected='59C2 118E D206 D927 E667 EBE3 D3E5 F56B 6D92 0D30'
get_release_key 'OpenSSH' 'https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/RELEASE_KEY.asc' '6D920D30' '59C2 118E D206 D927 E667 EBE3 D3E5 F56B 6D92 0D30'
}
echo -e "\nGetting OpenSSH release key...\n"
wget https://ftp.openbsd.org/pub/OpenBSD/OpenSSH/RELEASE_KEY.asc
echo -e "\nImporting OpenSSH release key...\n"
gpg --import RELEASE_KEY.asc
function get_release_key {
project=$1
key_url=$2
key_id=$3
release_key_fingerprint_expected=$4
local release_key_fingerprint_actual=`gpg --fingerprint 6D920D30`
echo -e "\nGetting ${project} release key...\n"
wget -O key.asc $2
echo -e "\nImporting ${project} release key...\n"
gpg --import key.asc
rm key.asc
local release_key_fingerprint_actual=`gpg --fingerprint ${key_id}`
if [[ $release_key_fingerprint_actual != *"$release_key_fingerprint_expected"* ]]; then
echo -e "\n${REDB}Error: OpenSSH release key fingerprint does not match expected value!\n\tExpected: $release_key_fingerprint_expected\n\tActual: $release_key_fingerprint_actual\n\nTerminating.${CLR}"
echo -e "\n${REDB}Error: ${project} release key fingerprint does not match expected value!\n\tExpected: $release_key_fingerprint_expected\n\tActual: $release_key_fingerprint_actual\n\nTerminating.${CLR}"
exit -1
fi
echo -e "\n\n${GREEN}OpenSSH release key matches expected value.${CLR}\n"
echo -e "\n\n${GREEN}${project} release key matches expected value.${CLR}\n"
}
# Downloads the specified version of Dropbear.
function get_dropbear {
version=$1
tarball_checksum_expected=$2
get_source 'Dropbear' $version $tarball_checksum_expected
}
# Downloads the specified version of OpenSSH.
function get_openssh {
echo -e "\nGetting OpenSSH $1 sources...\n"
wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-$1.tar.gz
version=$1
tarball_checksum_expected=$2
get_source 'OpenSSH' $version $tarball_checksum_expected
}
echo -e "\nGetting OpenSSH $1 signature...\n"
wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-$1.tar.gz.asc
openssh_sig=openssh-$1.tar.gz.asc
# Older releases were .sigs.
if [[ ! -f $openssh_sig ]]; then
wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-$1.tar.gz.sig
openssh_sig=openssh-$1.tar.gz.sig
function get_source {
project=$1
version=$2
tarball_checksum_expected=$3
base_url=
tarball=
sig=
signer=
if [[ $project == 'OpenSSH' ]]; then
base_url='https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/'
tarball="openssh-${version}.tar.gz"
sig="${tarball}.asc"
signer="Damien Miller "
elif [[ $project == 'Dropbear' ]]; then
base_url='https://matt.ucc.asn.au/dropbear/releases/'
tarball="dropbear-${version}.tar.bz2"
sig="${tarball}.asc"
signer="Dropbear SSH Release Signing <matt@ucc.asn.au>"
fi
local gpg_verify=`gpg --verify $openssh_sig openssh-$1.tar.gz 2>&1`
if [[ $gpg_verify != *"Good signature from \"Damien Miller "* ]]; then
echo -e "\n\n${REDB}Error: OpenSSH signature invalid!\n$gpg_verify\n\nTerminating.${CLR}"
echo -e "\nGetting ${project} ${version} sources...\n"
wget "${base_url}${tarball}"
echo -e "\nGetting ${project} ${version} signature...\n"
wget "${base_url}${sig}"
# Older OpenSSH releases were .sigs.
if [[ ($project == 'OpenSSH') && (! -f $sig) ]]; then
wget ${base_url}openssh-${version}.tar.gz.sig
sig=openssh-${version}.tar.gz.sig
fi
local gpg_verify=`gpg --verify ${sig} ${tarball} 2>&1`
if [[ $gpg_verify != *"Good signature from \"${signer}"* ]]; then
echo -e "\n\n${REDB}Error: ${project} signature invalid!\n$gpg_verify\n\nTerminating.${CLR}"
exit -1
fi
# Check GPG's return value. 0 denotes a valid signature, and 1 is returned
# on invalid signatures.
if [[ $? != 0 ]]; then
echo -e "\n\n${REDB}Error: OpenSSH signature invalid! Verification returned code: $?\n\nTerminating.${CLR}"
echo -e "\n\n${REDB}Error: ${project} signature invalid! Verification returned code: $?\n\nTerminating.${CLR}"
exit -1
fi
echo -e "${GREEN}Signature on OpenSSH sources verified.${CLR}\n"
echo -e "${GREEN}Signature on ${project} sources verified.${CLR}\n"
local openssh_checksum_actual=`sha256sum openssh-$1.tar.gz | cut -f1 -d" "`
if [[ $openssh_checksum_actual != "$2" ]]; then
echo -e "${REDB}Error: OpenSSH checksum is invalid!\n Expected: $2\n Actual: $openssh_checksum_actual\n\n Terminating.${CLR}"
local checksum_actual=`sha256sum ${tarball} | cut -f1 -d" "`
if [[ $checksum_actual != $tarball_checksum_expected ]]; then
echo -e "${REDB}Error: ${project} checksum is invalid!\n Expected: ${tarball_checksum_expected}\n Actual: ${checksum_actual}\n\n Terminating.${CLR}"
exit -1
fi
}
# Runs a Dropbear test. Upon failure, a diff between the expected and actual results
# is shown, then the script immediately terminates.
function run_dropbear_test {
dropbear_version=$1
test_number=$2
options=$3
run_test 'Dropbear' $dropbear_version $test_number "$options"
}
@ -214,15 +312,42 @@ function run_openssh_test {
openssh_version=$1
test_number=$2
cid=`docker run -d -p 2222:22 ${IMAGE_NAME}:${IMAGE_VERSION} /openssh/sshd-${openssh_version} -D -f /etc/ssh/sshd_config-${openssh_version}_${test_number}`
run_test 'OpenSSH' $openssh_version $test_number ''
}
function run_test {
server_type=$1
version=$2
test_number=$3
options=$4
server_exec=
test_result=
expected_result=
test_name=
if [[ $server_type == 'OpenSSH' ]]; then
server_exec="/openssh/sshd-${version} -D -f /etc/ssh/sshd_config-${version}_${test_number}"
test_result="${TEST_RESULT_DIR}/openssh_${version}_${test_number}.txt"
expected_result="test/docker/expected_results/openssh_${version}_${test_number}.txt"
test_name="OpenSSH ${version} ${test_number}"
options=
elif [[ $server_type == 'Dropbear' ]]; then
server_exec="/dropbear/dropbear-${version} -F ${options}"
test_result="${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}"
fi
cid=`docker run -d -p 2222:22 ${IMAGE_NAME}:${IMAGE_VERSION} ${server_exec}`
if [[ $? != 0 ]]; then
echo -e "${REDB}Failed to run docker image! (exit code: $?)${CLR}"
exit 1
fi
./ssh-audit.py localhost:2222 > ${TEST_RESULT_DIR}/openssh_${openssh_version}_${test_number}.txt
./ssh-audit.py localhost:2222 > $test_result
if [[ $? != 0 ]]; then
echo -e "${REDB}Failed to ssh-audit.py! (exit code: $?)${CLR}"
echo -e "${REDB}Failed to run ssh-audit.py! (exit code: $?)${CLR}"
docker container stop $cid > /dev/null
exit 1
fi
@ -233,16 +358,17 @@ function run_openssh_test {
exit 1
fi
diff=`diff -u test/docker/expected_results/openssh_${openssh_version}_${test_number}.txt ${TEST_RESULT_DIR}/openssh_${openssh_version}_${test_number}.txt`
diff=`diff -u ${expected_result} ${test_result}`
if [[ $? == 0 ]]; then
echo -e "OpenSSH ${openssh_version} ${test_number} ${GREEN}passed${CLR}."
echo -e "${test_name} ${GREEN}passed${CLR}."
else
echo -e "OpenSSH ${openssh_version} ${test_number} ${REDB}FAILED${CLR}.\n\n${diff}\n"
echo -e "${test_name} ${REDB}FAILED${CLR}.\n\n${diff}\n"
exit 1
fi
}
# First check if docker is functional.
docker version > /dev/null
if [[ $? != 0 ]]; then
@ -276,6 +402,8 @@ echo
run_openssh_test '8.0p1' 'test1'
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'
# The test functions above will terminate the script on failure, so if we reached here,
# all tests are successful.