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#!/usr/bin/env python
import unittest
import os
from tempfile import mkstemp
from ct.crypto import pem
class PemTest(unittest.TestCase):
BLOB = "helloworld\x00"
MARKER = "BLOB"
PEM_BLOB = """-----BEGIN BLOB-----
aGVsbG93b3JsZAA=
-----END BLOB-----\n"""
def setUp(self):
self.__tempfiles = []
def create_temp_file(self, contents=None):
fd, name = mkstemp()
self.__tempfiles.append(name)
if contents:
os.write(fd, contents)
os.close(fd)
return name
def get_file_contents(self, name):
with open(name) as f:
return f.read()
def tearDown(self):
for name in self.__tempfiles:
os.remove(name)
class PemReaderTest(PemTest):
def __assert_default_read_result(self, results):
self.assertEqual(1, len(results))
read_blob, read_marker = results[0]
self.assertEqual(read_blob, self.BLOB)
self.assertEqual(read_marker, self.MARKER)
def test_create_reader_from_file(self):
name = self.create_temp_file(self.PEM_BLOB)
reader = pem.PemReader.from_file(name, (self.MARKER,))
self.assertIsInstance(reader, pem.PemReader)
results = [r for r in reader]
reader.close()
self.__assert_default_read_result(results)
def test_create_reader_from_string(self):
reader = pem.PemReader.from_string(self.PEM_BLOB, (self.MARKER,))
self.assertIsInstance(reader, pem.PemReader)
results = [r for r in reader]
reader.close()
self.__assert_default_read_result(results)
def test_create_reader_from_file_object(self):
name = self.create_temp_file(self.PEM_BLOB)
with open(name) as f:
reader = pem.PemReader(f, (self.MARKER,))
results = [r for r in reader]
self.__assert_default_read_result(results)
def test_reader_as_context_manager(self):
name = self.create_temp_file(self.PEM_BLOB)
f = open(name)
with pem.PemReader(f, (self.MARKER,)) as reader:
results = [r for r in reader]
self.__assert_default_read_result(results)
self.assertTrue(f.closed)
def test_reader_reads_all_blobs(self):
blob1 = "hello"
marker1 = "BLOB"
pem1 = "-----BEGIN BLOB-----\naGVsbG8=\n-----END BLOB-----\n"
blob2 = "world"
marker2 = "CHUNK"
pem2 = """-----BEGIN CHUNK-----\nd29ybGQ=\n-----END CHUNK-----\n"""
reader = pem.PemReader.from_string(pem1 + pem2, (marker2, marker1))
read_blobs = [b for b in reader]
self.assertEqual(len(read_blobs), 2)
self.assertEqual((blob1, marker1), read_blobs[0])
self.assertEqual((blob2, marker2), read_blobs[1])
def test_reader_honours_markers(self):
marker1 = "BLOB"
blob1 = "hello"
pem1 = "-----BEGIN BLOB-----\naGVsbG8=\n-----END BLOB-----\n"
# blob2 = "world"
pem2 = """-----BEGIN CHUNK-----\nd29ybGQ=\n-----END CHUNK-----\n"""
reader = pem.PemReader.from_string(pem1 + pem2, (marker1,))
read_blobs = [b for b in reader]
self.assertEqual(len(read_blobs), 1)
self.assertEqual((blob1, marker1), read_blobs[0])
def test_reader_skips_invalid_blocks(self):
marker = "BLOB"
blob1 = "hello"
pem1 = "-----BEGIN BLOB-----\naGVsbG8=\n-----END BLOB-----\n"
# blob2 = "world"
pem2 = """-----BEGIN BLOB-----badbase64^&*\n-----END BLOB-----\n"""
# Make the middle blob invalid and expect the reader to skip it
# and resume business as usual with the next blob.
reader = pem.PemReader.from_string(pem1 + pem2 + pem1, [marker])
read_blobs = [b for b in reader]
self.assertEqual(len(read_blobs), 2)
self.assertEqual((blob1, marker), read_blobs[0])
self.assertEqual((blob1, marker), read_blobs[1])
def test_reader_raises_on_invalid_block_in_non_skip_mode(self):
pem1 = "-----BEGIN BLOB-----\naGVsbG8=\n-----END BLOB-----\n"
pem2 = """-----BEGIN BLOB-----\nbadbase64^&*\n-----END BLOB-----\n"""
reader = iter(pem.PemReader.from_string(pem1 + pem2, ("BLOB",),
skip_invalid_blobs=False))
reader.next()
self.assertRaises(pem.PemError, reader.next)
def test_reader_stops_no_valid_blocks(self):
reader = iter(pem.PemReader.from_string("nothing here", ("BLOB",)))
self.assertRaises(StopIteration, reader.next)
# Once more for good measure.
self.assertRaises(StopIteration, reader.next)
def test_reader_raises_on_no_valid_block_in_non_skip_mode(self):
reader = iter(pem.PemReader.from_string("nothing here", ("BLOB",),
skip_invalid_blobs=False))
self.assertRaises(pem.PemError, reader.next)
def test_reader_matches_markers(self):
# blob1 = "hello"
pem1 = "-----BEGIN BLOB-----\naGVsbG8=\n-----END BLOB-----\n"
# blob2 = "world"
pem2 = """-----BEGIN BLOB-----\nbadbase64^&*\n-----END CHUNK-----\n"""
reader = iter(pem.PemReader.from_string(pem1 + pem2,
("BLOB", "CHUNK")))
reader.next()
self.assertRaises(StopIteration, reader.next)
def test_reader_reads_all_lines(self):
blob1 = "hello"
pem1 = "-----BEGIN BLOB-----\naGV\nsbG8=\n-----END BLOB-----\n"
reader = pem.PemReader.from_string(pem1, ("BLOB",))
results = [r for r in reader]
self.assertEqual(1, len(results))
read_blob, _ = results[0]
self.assertEqual(read_blob, blob1)
# Tests for module methods. The module methods are very light wrappers
# around PemReader, so we don't repeat all of the tests here.
def test_from_pem(self):
self.assertEqual((self.BLOB, self.MARKER),
pem.from_pem(self.PEM_BLOB, (self.MARKER,)))
# from_pem will also take a plain string for the marker
self.assertEqual((self.BLOB, self.MARKER),
pem.from_pem(self.PEM_BLOB, self.MARKER))
def test_from_pem_file(self):
name = self.create_temp_file(self.PEM_BLOB)
self.assertEqual((self.BLOB, self.MARKER),
pem.from_pem_file(name, (self.MARKER,)))
def test_pem_blocks(self):
gen = pem.pem_blocks(self.PEM_BLOB, (self.MARKER,))
self.assertEqual((self.BLOB, self.MARKER), gen.next())
self.assertRaises(StopIteration, gen.next)
def test_pem_blocks_from_file(self):
name = self.create_temp_file(self.PEM_BLOB)
gen = pem.pem_blocks_from_file(name, (self.MARKER,))
self.assertEqual((self.BLOB, self.MARKER), gen.next())
self.assertRaises(StopIteration, gen.next)
class PemWriterTest(PemTest):
def test_create_writer_from_file(self):
name = self.create_temp_file()
writer = pem.PemWriter.from_file(name, self.MARKER)
self.assertIsInstance(writer, pem.PemWriter)
writer.write(self.BLOB)
writer.close()
self.assertEqual(self.PEM_BLOB, self.get_file_contents(name))
def test_create_writer_from_file_object(self):
name = self.create_temp_file()
with open(name, "w+") as f:
writer = pem.PemWriter(f, self.MARKER)
writer.write(self.BLOB)
writer.close()
self.assertEqual(self.PEM_BLOB, self.get_file_contents(name))
def test_writer_as_context_manager(self):
name = self.create_temp_file()
f = open(name, "w+")
with pem.PemWriter(f, self.MARKER) as writer:
writer.write(self.BLOB)
self.assertTrue(f.closed)
self.assertEqual(self.PEM_BLOB, self.get_file_contents(name))
def test_write_to_string(self):
self.assertEqual(pem.PemWriter.pem_string(self.BLOB, self.MARKER),
self.PEM_BLOB)
def test_write_all_blobs(self):
name = self.create_temp_file()
blobs = [self.BLOB]*3
writer = pem.PemWriter.from_file(name, self.MARKER)
writer.write_blocks(blobs)
writer.close()
self.assertEqual(self.PEM_BLOB * 3, self.get_file_contents(name))
def test_write_all_blobs_to_string(self):
blobs = [self.BLOB]*3
self.assertEqual(pem.PemWriter.blocks_to_pem_string(blobs,
self.MARKER),
self.PEM_BLOB * 3)
def test_append(self):
contents = "yadayadayada\n"
name = self.create_temp_file(contents)
writer = pem.PemWriter.from_file(name, self.MARKER, append=True)
writer.write(self.BLOB)
writer.close()
self.assertEqual(contents + self.PEM_BLOB,
self.get_file_contents(name))
def test_appends_newline(self):
contents = "yadayadayada"
name = self.create_temp_file(contents)
writer = pem.PemWriter.from_file(name, self.MARKER, append=True)
writer.write(self.BLOB)
writer.close()
self.assertEqual(contents + "\n" + self.PEM_BLOB,
self.get_file_contents(name))
def test_write_long_blob(self):
long_blob = ("IammorethansixtyfourcharacterslongandsoIshouldbesplit"
"acrossmultiplelines")
encoded_long_blob = """-----BEGIN BLOB-----
SWFtbW9yZXRoYW5zaXh0eWZvdXJjaGFyYWN0ZXJzbG9uZ2FuZHNvSXNob3VsZGJl
c3BsaXRhY3Jvc3NtdWx0aXBsZWxpbmVz
-----END BLOB-----
"""
self.assertEqual(pem.PemWriter.pem_string(long_blob, ("BLOB",)),
encoded_long_blob)
# Module methods
def test_to_pem(self):
self.assertEqual(self.PEM_BLOB,
pem.to_pem(self.BLOB, self.MARKER))
def test_blocks_to_pem(self):
self.assertEqual(self.PEM_BLOB + self.PEM_BLOB,
pem.blocks_to_pem([self.BLOB] * 2, self.MARKER))
def test_to_pem_file(self):
name = self.create_temp_file()
pem.to_pem_file(self.BLOB, name, self.MARKER)
self.assertEqual(self.PEM_BLOB, self.get_file_contents(name))
def test_blocks_to_pem_file(self):
name = self.create_temp_file()
pem.blocks_to_pem_file([self.BLOB] * 2, name, self.MARKER)
self.assertEqual(self.PEM_BLOB + self.PEM_BLOB,
self.get_file_contents(name))
if __name__ == "__main__":
unittest.main()
|
