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- #!/bin/bash
- set -exo pipefail
- # vim: set ts=8 shiftwidth=4 softtabstop=4 expandtab smarttab colorcolumn=80:
- #
- # Copyright (c) 2020 Red Hat, Inc.
- # Author: Sergio Correia <scorreia@redhat.com>
- #
- # This program is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, either version 3 of the License, or
- # (at your option) any later version.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
- . tang-common-test-functions
- TEST=$(basename "${0}")
- on_exit() {
- exit_status=$?
- tang_stop "${TMP}"
- [ -d "${TMP}" ] && rm -rf "${TMP}"
- exit "${exit_status}"
- }
- trap 'on_exit' EXIT
- TMP="$(mktemp -d)"
- port=$(tang_new_random_port)
- tang_run "${TMP}" "${port}"
- url="http://localhost:${port}"
- data="just a sample text"
- # Get the advertisement and extract the keys.
- adv="$(tang_get_adv "${port}")"
- jwks="$(jose fmt --json="${adv}" --get payload --b64load --output=-)"
- enc="$(printf '%s' "${jwks}" | jose jwk use --input=- --required \
- --use deriveKey --output=-)"
- jose fmt --json="${enc}" --get keys --array \
- || enc="$(printf '{"keys": [%s]}' "${enc}")"
- jwk="$(jose fmt --json="${enc}" --get keys --array --foreach=- \
- | jose fmt --json=- --delete key_ops --delete alg --output=-)"
- jwe_t='{"protected":{"alg":"ECDH-ES","enc":"A256GCM","clevis":{"pin":"tang","tang":{}}}}'
- jwe_t="$(jose fmt --json="${jwe_t}" --get protected --get clevis --get tang --quote "${url}" --set url -UUUUo-)"
- jwe_t="$(printf '%s' "${jwks}" | jose fmt --json="${jwe_t}" --get protected --get clevis --get tang --json=- --set adv -UUUUo-)"
- # We currently support SHA-1 (legacy) and SHA-256.
- CLEVIS_SUPPORTED_THP_ALGS="S1 S256"
- # Now we will use every hash algorithm supported by jose to create a thumbprint
- # for `kid', then we do the encoding and verify clevis decrypt can decode it
- # correctly.
- for alg in ${CLEVIS_SUPPORTED_THP_ALGS}; do
- kid="$(printf '%s' "${jwk}" | jose jwk thp -a "${alg}" --input=-)"
- jwe="$(jose fmt --json="${jwe_t}" --get protected --quote "${kid}" -s kid -UUo-)"
- encoded=$(printf '%s%s' "${jwk}" "${data}" \
- | jose jwe enc --input="${jwe}" --key=- --detached=- --compact)
- if ! decoded="$(printf '%s' "${encoded}" | clevis decrypt)"; then
- tang_error "${TEST}: decoding is expected to work (alg = ${alg})"
- fi
- if [ "${decoded}" != "${data}" ]; then
- tang_error "${TEST}: tang decrypt should have succeeded decoded[${decoded}] data[${data}] (alg = ${alg})"
- fi
- done
- # Now let's test encryption providing the thp in the configuration.
- data="just another test"
- for alg in ${CLEVIS_SUPPORTED_THP_ALGS}; do
- thp="$(jose fmt --json="${adv}" -g payload -y -o- \
- | jose jwk use -i- -r -u verify -o- \
- | jose jwk thp -i- -a "${alg}")"
- cfg="$(printf '{"url":"%s", "thp":"%s"}' "${url}" "${thp}")"
- if ! encoded=$(printf '%s' "${data}" | clevis encrypt tang "${cfg}"); then
- tang_error "${TEST}: tang encryption should have succeeded when providing the thp (${thp}) with any supported algorithm (${alg})"
- fi
- if ! decoded="$(printf '%s' "${encoded}" | clevis decrypt)"; then
- tang_error "${TEST}: decoding is expected to work (thp alg = ${alg})"
- fi
- if [ "${decoded}" != "${data}" ]; then
- tang_error "${TEST}: tang decrypt should have succeeded decoded[${decoded}] data[${data}] (alg = ${alg})"
- fi
- done
- # Let's also try some unsupported thp hash algorithms.
- UNSUPPORTED="S224 S384 S512" # SHA-224, SHA-384, SHA-512.
- for alg in ${UNSUPPORTED}; do
- thp="$(jose fmt --json="${adv}" -g payload -y -o- \
- | jose jwk use -i- -r -u verify -o- \
- | jose jwk thp -i- -a "${alg}")"
- cfg="$(printf '{"url":"%s", "thp":"%s"}' "${url}" "${thp}")"
- if echo foo | clevis encrypt tang "${cfg}" >/dev/null; then
- tang_error "${TEST}: tang encryption should have failed when providing the thp (${thp}) with an unsupported algorithm (${alg})"
- fi
- done
- # Now let's try some bad values for thp.
- for thp in "" "foo" "invalid"; do
- cfg="$(printf '{"url":"%s", "thp":"%s"}' "${url}" "${thp}")"
- if echo foo | clevis encrypt tang "${cfg}" >/dev/null; then
- tang_error "${TEST}: tang encryption expected to fail when providing a bad thp"
- fi
- done
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