examples/python/envelope/envelope_test.sh

#!/bin/bash
# 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 envelope python example.

ENVELOPE_CLI="$1"
CRED_FILE="$2"
KEY_URI="gcp-kms://projects/tink-test-infrastructure/locations/global/keyRings/unit-and-integration-testing/cryptoKeys/aead-key"

# Root certificates for GRPC.
# Referece:
#   https://github.com/grpc/grpc/blob/master/doc/environment_variables.md
export GRPC_DEFAULT_SSL_ROOTS_FILE_PATH="${TEST_SRCDIR}/google_root_pem/file/downloaded"

DATA_FILE="$TEST_TMPDIR/example_data.txt"

echo "This is some plaintext to be encrypted." > $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 initialization and encryption
test_name="encrypt"
echo "+++ Starting test $test_name..."

##### Run encryption
test_command $ENVELOPE_CLI encrypt $CRED_FILE $KEY_URI $DATA_FILE "$DATA_FILE".encrypted

if [[ $TEST_STATUS -eq 0 ]]; then
  echo "+++ Success: file was encrypted."
else
  echo "--- Failure: could not encrypt file."
  exit 1
fi

#############################################################################
#### Test if decryption succeeds and returns original file
test_name="decrypt"
echo "+++ Starting test $test_name..."

##### Run decryption
test_command $ENVELOPE_CLI decrypt $CRED_FILE $KEY_URI "$DATA_FILE".encrypted "$DATA_FILE".decrypted

if [[ $TEST_STATUS -eq 0 ]]; then
  echo "+++ Success: file was successfully decrypted."
else
  echo "--- Failure: could not decrypt file."
  exit 1
fi

if cmp -s $DATA_FILE $DATA_FILE.decrypted; then
  echo "+++ Success: file content is the same after decryption."
else
  echo "--- Failure: file content is not the same after decryption."
  exit 1
fi