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import binascii
import copy
import hashlib
import json
import os
from io import BytesIO
from awscrt.crypto import RSASignatureAlgorithm
from awscli.customizations.cloudtrail.verifyqueryresults import (
SIGN_FILE_NAME,
InformationCollectionError,
LocalExportFilesHashValidator,
LocalSignFileProvider,
S3ExportFilesHashValidator,
S3SignFileProvider,
Sha256RsaSignatureValidator,
ValidationError,
)
from awscli.testutils import mock, unittest
from tests import PublicPrivateKeyLoader
from . import get_private_key_path, get_public_key_path
s3_bucket = "s3-bucket-name"
S3_PREFIX = "s3/prefix/"
S3_PATH = f"s3://{s3_bucket}/{S3_PREFIX}"
LOCAL_FILE_PREFIX = "/local/prefix/"
SAMPLE_SIGNING_FILE = {
"region": "us-east-1",
"files": [
{
"fileHashValue": "c147efcfc2d7ea666a9e4f5187b115c90903f0fc896a56d"
"f9a6ef5d8f3fc9f31",
"fileName": "result_1.csv.gz",
}
],
"hashAlgorithm": "SHA-256",
"signatureAlgorithm": "SHA256withRSA",
"hashSignature": "hashSignature",
}
class TestSignFileProvider(unittest.TestCase):
def test_get_sign_file_from_s3_success(self):
sign_file_s3_response = {
"Body": BytesIO(json.dumps(SAMPLE_SIGNING_FILE).encode("utf-8"))
}
s3_client = mock.Mock()
s3_client.get_object.side_effect = [sign_file_s3_response]
provider = S3SignFileProvider(
s3_client=s3_client,
s3_bucket=s3_bucket,
s3_path_prefix=S3_PREFIX,
)
sign_file = provider.provide_sign_file()
self.assertEqual(sign_file, SAMPLE_SIGNING_FILE)
s3_client.get_object.assert_has_calls(
[mock.call(Bucket=s3_bucket, Key=S3_PREFIX + SIGN_FILE_NAME)]
)
def test_get_sign_file_from_s3_fail_with_invalid_sign_file(self):
with self.assertRaises(InformationCollectionError) as context:
sign_file_s3_response = {"Body": BytesIO(b"{123")}
s3_client = mock.Mock()
s3_client.get_object.side_effect = [sign_file_s3_response]
provider = S3SignFileProvider(
s3_client=s3_client,
s3_bucket=s3_bucket,
s3_path_prefix=S3_PREFIX,
)
provider.provide_sign_file()
self.assertTrue("Unable to load sign file" in context)
def test_get_sign_file_from_local_success(self):
current_dir = os.path.dirname(os.path.realpath(__file__))
provider = LocalSignFileProvider(
local_path_prefix=os.path.join(current_dir, "test_resource")
)
sign_file = provider.provide_sign_file()
self.assertEqual(sign_file["hashSignature"], "hashSignature")
class TestExportFilesHashValidator(unittest.TestCase):
def test_traverse_from_s3_success(self):
s3_input_file1 = {"Body": BytesIO(b"file1")}
s3_client = mock.Mock()
s3_client.get_object.side_effect = [s3_input_file1]
validator = S3ExportFilesHashValidator(
s3_client=s3_client,
s3_bucket=s3_bucket,
s3_path_prefix=S3_PREFIX,
)
validator.validate_export_files(SAMPLE_SIGNING_FILE)
s3_client.get_object.assert_has_calls(
[
mock.call(
Bucket=s3_bucket,
Key=S3_PREFIX
+ SAMPLE_SIGNING_FILE["files"][0]["fileName"],
)
]
)
def test_traverse_from_local_success(self):
current_dir = os.path.dirname(os.path.realpath(__file__))
validator = LocalExportFilesHashValidator(
local_path_prefix=os.path.join(current_dir, "test_resource")
)
validator.validate_export_files(SAMPLE_SIGNING_FILE)
def test_traverse_from_local_fail_with_hash_error(self):
sign_file = copy.deepcopy(SAMPLE_SIGNING_FILE)
sign_file["files"][0]["fileName"] = "result_2.csv.gz"
current_dir = os.path.dirname(os.path.realpath(__file__))
with self.assertRaises(ValidationError) as context:
validator = LocalExportFilesHashValidator(
local_path_prefix=os.path.join(current_dir, "test_resource")
)
validator.validate_export_files(sign_file)
self.assertTrue("wrong hash value" in context)
def test_traverse_from_local_no_export_file(self):
sign_file = copy.deepcopy(SAMPLE_SIGNING_FILE)
sign_file["files"] = []
with self.assertRaises(ValidationError) as context:
validator = LocalExportFilesHashValidator(
local_path_prefix=LOCAL_FILE_PREFIX
)
validator.validate_export_files(sign_file)
self.assertTrue("No export file was found in sign file" in context)
class TestSha256RSADigestValidator(unittest.TestCase):
def setUp(self):
self._sign_file = {
"region": "us-east-1",
"files": [
{
"fileHashValue": "fileHashValue1",
"fileName": "result_1.csv.gz",
},
{
"fileHashValue": "fileHashValue2",
"fileName": "result_2.csv.gz",
},
],
"hashAlgorithm": "SHA-256",
"signatureAlgorithm": "SHA256withRSA",
"hashSignature": "hashSignature",
}
def test_validates_digests_success(self):
(
public_key,
private_key,
) = PublicPrivateKeyLoader.load_private_key_and_public_key(
get_private_key_path(), get_public_key_path()
)
string_to_sign = "{} {}".format(
self._sign_file["files"][0]["fileHashValue"],
self._sign_file["files"][1]["fileHashValue"],
)
signature = private_key.sign(
signature_algorithm=RSASignatureAlgorithm.PKCS1_5_SHA256,
digest=hashlib.sha256(string_to_sign.encode()).digest(),
)
self._sign_file["hashSignature"] = binascii.hexlify(signature)
validator = Sha256RsaSignatureValidator()
validator.validate(public_key, self._sign_file)
def test_validates_digests_fail_with_public_key_format(self):
with self.assertRaises(ValidationError) as context:
(
_,
private_key,
) = PublicPrivateKeyLoader.load_private_key_and_public_key(
get_private_key_path(), get_public_key_path()
)
string_to_sign = "{} {}".format(
self._sign_file["files"][0]["fileHashValue"],
self._sign_file["files"][1]["fileHashValue"],
)
signature = private_key.sign(
signature_algorithm=RSASignatureAlgorithm.PKCS1_5_SHA256,
digest=hashlib.sha256(string_to_sign.encode()).digest(),
)
self._sign_file["hashSignature"] = binascii.hexlify(signature)
validator = Sha256RsaSignatureValidator()
validator.validate("124", self._sign_file)
self.assertTrue("unable to load PKCS #1 key" in context)
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