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"""Library for generating Mbed TLS test data.
"""
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
#
# 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.
import binascii
import os
import sys
from typing import Iterable, List, Optional
from mbedtls_dev import typing_util
def hex_string(data: bytes) -> str:
return '"' + binascii.hexlify(data).decode('ascii') + '"'
class MissingDescription(Exception):
pass
class MissingFunction(Exception):
pass
class TestCase:
"""An Mbed TLS test case."""
def __init__(self, description: Optional[str] = None):
self.comments = [] #type: List[str]
self.description = description #type: Optional[str]
self.dependencies = [] #type: List[str]
self.function = None #type: Optional[str]
self.arguments = [] #type: List[str]
def add_comment(self, *lines: str) -> None:
self.comments += lines
def set_description(self, description: str) -> None:
self.description = description
def set_dependencies(self, dependencies: List[str]) -> None:
self.dependencies = dependencies
def set_function(self, function: str) -> None:
self.function = function
def set_arguments(self, arguments: List[str]) -> None:
self.arguments = arguments
def check_completeness(self) -> None:
if self.description is None:
raise MissingDescription
if self.function is None:
raise MissingFunction
def write(self, out: typing_util.Writable) -> None:
"""Write the .data file paragraph for this test case.
The output starts and ends with a single newline character. If the
surrounding code writes lines (consisting of non-newline characters
and a final newline), you will end up with a blank line before, but
not after the test case.
"""
self.check_completeness()
assert self.description is not None # guide mypy
assert self.function is not None # guide mypy
out.write('\n')
for line in self.comments:
out.write('# ' + line + '\n')
out.write(self.description + '\n')
if self.dependencies:
out.write('depends_on:' + ':'.join(self.dependencies) + '\n')
out.write(self.function + ':' + ':'.join(self.arguments) + '\n')
def write_data_file(filename: str,
test_cases: Iterable[TestCase],
caller: Optional[str] = None) -> None:
"""Write the test cases to the specified file.
If the file already exists, it is overwritten.
"""
if caller is None:
caller = os.path.basename(sys.argv[0])
with open(filename, 'w') as out:
out.write('# Automatically generated by {}. Do not edit!\n'
.format(caller))
for tc in test_cases:
tc.write(out)
out.write('\n# End of automatically generated file.\n')
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