#!/usr/bin/env python

"""
<Program Name>
  test_formats.py

<Author>
  Vladimir Diaz <vladimir.v.diaz@gmail.com>

<Started>
  January 2017 (modified from TUF's original formats.py)

<Copyright>
  See LICENSE for licensing information.

<Purpose>
  Unit test for 'formats.py'
"""

import datetime
import unittest

import securesystemslib.formats
import securesystemslib.schema


class TestFormats(unittest.TestCase):  # pylint: disable=missing-class-docstring
    def setUp(self):
        pass

    def tearDown(self):
        pass

    def test_schemas(self):
        # Test conditions for valid schemas.
        valid_schemas = {
            "ISO8601_DATETIME_SCHEMA": (
                securesystemslib.formats.ISO8601_DATETIME_SCHEMA,
                "1985-10-21T13:20:00Z",
            ),
            "UNIX_TIMESTAMP_SCHEMA": (
                securesystemslib.formats.UNIX_TIMESTAMP_SCHEMA,
                499137720,
            ),
            "HASH_SCHEMA": (
                securesystemslib.formats.HASH_SCHEMA,
                "A4582BCF323BCEF",
            ),
            "HASHDICT_SCHEMA": (
                securesystemslib.formats.HASHDICT_SCHEMA,
                {"sha256": "A4582BCF323BCEF"},
            ),
            "HEX_SCHEMA": (
                securesystemslib.formats.HEX_SCHEMA,
                "A4582BCF323BCEF",
            ),
            "KEYID_SCHEMA": (
                securesystemslib.formats.KEYID_SCHEMA,
                "123456789abcdef",
            ),
            "KEYIDS_SCHEMA": (
                securesystemslib.formats.KEYIDS_SCHEMA,
                ["123456789abcdef", "123456789abcdef"],
            ),
            "SCHEME_SCHEMA": (
                securesystemslib.formats.SCHEME_SCHEMA,
                "ecdsa-sha2-nistp256",
            ),
            "PATH_SCHEMA": (
                securesystemslib.formats.PATH_SCHEMA,
                "/home/someuser/",
            ),
            "PATHS_SCHEMA": (
                securesystemslib.formats.PATHS_SCHEMA,
                ["/home/McFly/", "/home/Tannen/"],
            ),
            "URL_SCHEMA": (
                securesystemslib.formats.URL_SCHEMA,
                "https://www.updateframework.com/",
            ),
            "NAME_SCHEMA": (
                securesystemslib.formats.NAME_SCHEMA,
                "Marty McFly",
            ),
            "TEXT_SCHEMA": (securesystemslib.formats.TEXT_SCHEMA, "Password: "),
            "BOOLEAN_SCHEMA": (securesystemslib.formats.BOOLEAN_SCHEMA, True),
            "RSAKEYBITS_SCHEMA": (
                securesystemslib.formats.RSAKEYBITS_SCHEMA,
                4096,
            ),
            "PASSWORD_SCHEMA": (
                securesystemslib.formats.PASSWORD_SCHEMA,
                "secret",
            ),
            "PASSWORDS_SCHEMA": (
                securesystemslib.formats.PASSWORDS_SCHEMA,
                ["pass1", "pass2"],
            ),
            "KEYVAL_SCHEMA": (
                securesystemslib.formats.KEYVAL_SCHEMA,
                {"public": "pubkey", "private": "privkey"},
            ),
            "PUBLIC_KEYVAL_SCHEMA": (
                securesystemslib.formats.PUBLIC_KEYVAL_SCHEMA,
                {"public": "pubkey"},
            ),
            "PUBLIC_KEYVAL_SCHEMA2": (
                securesystemslib.formats.PUBLIC_KEYVAL_SCHEMA,
                {"public": "pubkey", "private": ""},
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-md5",
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS_2": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-sha1",
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS_3": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-sha224",
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS_4": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-sha256",
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS_5": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-sha384",
            ),
            "RSA_SCHEME_SCHEMA_RSASSA_PSS_6": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsassa-pss-sha512",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-md5",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15_2": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-sha1",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15_3": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-sha224",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15_4": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-sha256",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15_5": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-sha384",
            ),
            "RSA_SCHEME_SCHEMA_PKCS1v15_6": (
                securesystemslib.formats.RSA_SCHEME_SCHEMA,
                "rsa-pkcs1v15-sha512",
            ),
            "KEY_SCHEMA": (
                securesystemslib.formats.KEY_SCHEMA,
                {
                    "keytype": "rsa",
                    "scheme": "rsassa-pss-sha256",
                    "keyval": {"public": "pubkey", "private": "privkey"},
                },
            ),
            "PUBLIC_KEY_SCHEMA": (
                securesystemslib.formats.KEY_SCHEMA,
                {
                    "keytype": "rsa",
                    "scheme": "rsassa-pss-sha256",
                    "keyval": {"public": "pubkey"},
                },
            ),
            "PUBLIC_KEY_SCHEMA2": (
                securesystemslib.formats.KEY_SCHEMA,
                {
                    "keytype": "rsa",
                    "scheme": "rsassa-pss-sha256",
                    "keyval": {"public": "pubkey", "private": ""},
                },
            ),
            "RSAKEY_SCHEMA": (
                securesystemslib.formats.RSAKEY_SCHEMA,
                {
                    "keytype": "rsa",
                    "scheme": "rsassa-pss-sha256",
                    "keyid": "123456789abcdef",
                    "keyval": {"public": "pubkey", "private": "privkey"},
                },
            ),
            "SIGNATURE_SCHEMA": (
                securesystemslib.formats.SIGNATURE_SCHEMA,
                {"keyid": "123abc", "method": "evp", "sig": "A4582BCF323BCEF"},
            ),
            "SIGNABLE_SCHEMA": (
                securesystemslib.formats.SIGNABLE_SCHEMA,
                {
                    "signed": "signer",
                    "signatures": [
                        {
                            "keyid": "123abc",
                            "method": "evp",
                            "sig": "A4582BCF323BCEF",
                        }
                    ],
                },
            ),
            "ANY_KEYDICT_SCHEMA": (
                securesystemslib.formats.ANY_KEYDICT_SCHEMA,
                {
                    "123abc": {
                        "keytype": "rsa",
                        "scheme": "rsassa-pss-sha256",
                        "keyval": {"public": "pubkey", "private": "privkey"},
                    }
                },
            ),
        }

        # Iterate 'valid_schemas', ensuring each 'valid_schema' correctly matches
        # its respective 'schema_type'.
        for (schema_type, valid_schema) in valid_schemas.values():
            if not schema_type.matches(  # pylint: disable=no-member
                valid_schema
            ):
                print("bad schema: " + repr(valid_schema))

            self.assertEqual(
                True,
                schema_type.matches(valid_schema),  # pylint: disable=no-member
            )

        # Test conditions for invalid schemas.
        # Set the 'valid_schema' of 'valid_schemas' to an invalid
        # value and test that it does not match 'schema_type'.
        for (schema_type, valid_schema) in valid_schemas.values():
            invalid_schema = 0xBAD

            if isinstance(schema_type, securesystemslib.schema.Integer):
                invalid_schema = "BAD"
            self.assertEqual(
                False,
                schema_type.matches(  # pylint: disable=no-member
                    invalid_schema
                ),
            )

    def test_unix_timestamp_to_datetime(self):
        # Test conditions for valid arguments.
        self.assertTrue(
            datetime.datetime,
            securesystemslib.formats.unix_timestamp_to_datetime(499137720),
        )
        datetime_object = datetime.datetime(1985, 10, 26, 1, 22)
        self.assertEqual(
            datetime_object,
            securesystemslib.formats.unix_timestamp_to_datetime(499137720),
        )

        # Test conditions for invalid arguments.
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.unix_timestamp_to_datetime,
            "bad",
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.unix_timestamp_to_datetime,
            1000000000000000000000,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.unix_timestamp_to_datetime,
            -1,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.unix_timestamp_to_datetime,
            ["5"],
        )

    def test_datetime_to_unix_timestamp(self):
        # Test conditions for valid arguments.
        datetime_object = datetime.datetime(2015, 10, 21, 19, 28)
        self.assertEqual(
            1445455680,
            securesystemslib.formats.datetime_to_unix_timestamp(
                datetime_object
            ),
        )

        # Test conditions for invalid arguments.
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.datetime_to_unix_timestamp,
            "bad",
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.datetime_to_unix_timestamp,
            1000000000000000000000,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.datetime_to_unix_timestamp,
            ["1"],
        )

    def test_format_base64(self):
        # Test conditions for valid arguments.
        data = "updateframework".encode("utf-8")
        self.assertEqual(
            "dXBkYXRlZnJhbWV3b3Jr", securesystemslib.formats.format_base64(data)
        )
        self.assertTrue(
            isinstance(securesystemslib.formats.format_base64(data), str)
        )

        # Test conditions for invalid arguments.
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.format_base64,
            123,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.format_base64,
            True,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.format_base64,
            ["123"],
        )

    def test_parse_base64(self):
        # Test conditions for valid arguments.
        base64 = "dXBkYXRlZnJhbWV3b3Jr"
        self.assertEqual(
            b"updateframework", securesystemslib.formats.parse_base64(base64)
        )
        self.assertTrue(
            isinstance(securesystemslib.formats.parse_base64(base64), bytes)
        )

        # Test conditions for invalid arguments.
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.parse_base64,
            123,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.parse_base64,
            True,
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.parse_base64,
            ["123"],
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            securesystemslib.formats.parse_base64,
            "/",
        )

    def test_encode_canonical(self):
        # Test conditions for valid arguments.
        encode = securesystemslib.formats.encode_canonical
        result = []
        output = result.append

        self.assertEqual('""', encode(""))
        self.assertEqual("[1,2,3]", encode([1, 2, 3]))
        self.assertEqual("[1,2,3]", encode([1, 2, 3]))
        self.assertEqual("[]", encode([]))
        self.assertEqual("{}", encode({}))
        self.assertEqual('{"A":[99]}', encode({"A": [99]}))
        self.assertEqual('{"A":true}', encode({"A": True}))
        self.assertEqual('{"B":false}', encode({"B": False}))
        self.assertEqual('{"x":3,"y":2}', encode({"x": 3, "y": 2}))

        self.assertEqual('{"x":3,"y":null}', encode({"x": 3, "y": None}))

        # Test condition with escaping " and \
        self.assertEqual('"\\""', encode('"'))
        self.assertEqual('"\\\\"', encode("\\"))
        self.assertEqual('"\\\\\\""', encode('\\"'))

        # Condition where 'encode()' sends the result to the callable
        # 'output'.
        self.assertEqual(None, encode([1, 2, 3], output))
        self.assertEqual("[1,2,3]", "".join(result))

        # Test conditions for invalid arguments.
        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            encode,
            securesystemslib.exceptions.FormatError,
        )
        self.assertRaises(securesystemslib.exceptions.FormatError, encode, 8.0)
        self.assertRaises(
            securesystemslib.exceptions.FormatError, encode, {"x": 8.0}
        )
        self.assertRaises(
            securesystemslib.exceptions.FormatError, encode, 8.0, output
        )

        self.assertRaises(
            securesystemslib.exceptions.FormatError,
            encode,
            {"x": securesystemslib.exceptions.FormatError},
        )


# Run unit test.
if __name__ == "__main__":
    unittest.main()