| #!/bin/bash |
| # Copyright 2021 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| ################################################################################ |
| |
| set -euo pipefail |
| |
| ############################################################################# |
| ##### Tests for MAC example. |
| |
| MAC_CLI="$1" |
| KEYSET_FILE="$2" |
| |
| DATA_FILE="$TEST_TMPDIR/example_data.txt" |
| MAC_FILE="$TEST_TMPDIR/expected_mac.txt" |
| |
| echo "This is some message to be verified." > $DATA_FILE |
| |
| ############################################################################# |
| |
| # A helper function for getting the return code of a command that may fail |
| # Temporarily disables error safety and stores return value in $TEST_STATUS |
| # Usage: |
| # % test_command somecommand some args |
| # % echo $TEST_STATUS |
| test_command() { |
| set +e |
| "$@" |
| TEST_STATUS=$? |
| set -e |
| } |
| |
| |
| ############################################################################# |
| #### Test MAC computation and verification. |
| test_name="mac_computation_and_verification" |
| echo "+++ Starting test $test_name..." |
| |
| ##### Run computation. |
| $MAC_CLI compute $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| ##### Run verification. |
| test_command $MAC_CLI verify $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| if [[ $TEST_STATUS -eq 0 ]]; then |
| echo "+++ Success: MAC computation was successful." |
| else |
| echo "--- Failure: MAC computation was unsuccessful" |
| exit 1 |
| fi |
| |
| |
| ############################################################################# |
| #### Test MAC verification fails with incorrect MAC. |
| test_name="mac_verification_fails_with_incorrect_mac" |
| echo "+++ Starting test $test_name..." |
| |
| ##### Run computation. |
| $MAC_CLI compute $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| # Modify MAC. |
| echo "DEADBEEF" >> "$MAC_FILE" |
| |
| ##### Run verification. |
| test_command $MAC_CLI verify $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| if [[ $TEST_STATUS -ne 0 ]]; then |
| echo "+++ Success: MAC verification failed for a modified mac." |
| else |
| echo "--- Failure: MAC verification passed for a modified mac." |
| exit 1 |
| fi |
| |
| |
| ############################################################################# |
| #### Test MAC verification fails with modified message. |
| test_name="mac_verification_fails_with_modified_message" |
| echo "+++ Starting test $test_name..." |
| |
| ##### Run computation. |
| $MAC_CLI compute $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| # Modify MAC. |
| echo "modified" >> "$DATA_FILE" |
| |
| ##### Run verification. |
| test_command $MAC_CLI verify $KEYSET_FILE $DATA_FILE $MAC_FILE |
| |
| if [[ $TEST_STATUS -ne 0 ]]; then |
| echo "+++ Success: MAC verification failed for a modified message." |
| else |
| echo "--- Failure: MAC verification passed for a modified message." |
| exit 1 |
| fi |
| |
| |
| ############################################################################# |
| #### Test bad key MAC computation. |
| test_name="bad_key_computation" |
| echo "+++ Starting test $test_name..." |
| |
| ##### Create a plaintext and bad keyset. |
| BAD_KEY_FILE="$TEST_TMPDIR/bad_key.txt" |
| echo "not a key" > $BAD_KEY_FILE |
| |
| ##### Run computation. |
| test_command $MAC_CLI compute $BAD_KEY_FILE $DATA_FILE $MAC_FILE |
| |
| if [[ $TEST_STATUS -ne 0 ]]; then |
| echo "+++ Success: MAC computation failed with bad keyset." |
| else |
| echo "--- Failure: MAC computation did not fail with bad keyset" |
| exit 1 |
| fi |