# coding: utf-8
"""
Test the RSA ANSI X9.31 signer and verifier
"""

# python libs
from __future__ import absolute_import, print_function, unicode_literals

import ctypes
import ctypes.util
import fnmatch
import glob
import os
import platform
import sys

import salt.utils.platform

# salt libs
from salt.utils.rsax931 import (
    RSAX931Signer,
    RSAX931Verifier,
    _find_libcrypto,
    _load_libcrypto,
)
from tests.support.mock import patch

# salt testing libs
from tests.support.unit import TestCase, skipIf


class RSAX931Test(TestCase):

    privkey_data = (
        "-----BEGIN RSA PRIVATE KEY-----\n"
        "MIIEpAIBAAKCAQEA75GR6ZTv5JOv90Vq8tKhKC7YQnhDIo2hM0HVziTEk5R4UQBW\n"
        "a0CKytFMbTONY2msEDwX9iA0x7F5Lgj0X8eD4ZMsYqLzqjWMekLC8bjhxc+EuPo9\n"
        "Dygu3mJ2VgRC7XhlFpmdo5NN8J2E7B/CNB3R4hOcMMZNZdi0xLtFoTfwU61UPfFX\n"
        "14mV2laqLbvDEfQLJhUTDeFFV8EN5Z4H1ttLP3sMXJvc3EvM0JiDVj4l1TWFUHHz\n"
        "eFgCA1Im0lv8i7PFrgW7nyMfK9uDSsUmIp7k6ai4tVzwkTmV5PsriP1ju88Lo3MB\n"
        "4/sUmDv/JmlZ9YyzTO3Po8Uz3Aeq9HJWyBWHAQIDAQABAoIBAGOzBzBYZUWRGOgl\n"
        "IY8QjTT12dY/ymC05GM6gMobjxuD7FZ5d32HDLu/QrknfS3kKlFPUQGDAbQhbbb0\n"
        "zw6VL5NO9mfOPO2W/3FaG1sRgBQcerWonoSSSn8OJwVBHMFLG3a+U1Zh1UvPoiPK\n"
        "S734swIM+zFpNYivGPvOm/muF/waFf8tF/47t1cwt/JGXYQnkG/P7z0vp47Irpsb\n"
        "Yjw7vPe4BnbY6SppSxscW3KoV7GtJLFKIxAXbxsuJMF/rYe3O3w2VKJ1Sug1VDJl\n"
        "/GytwAkSUer84WwP2b07Wn4c5pCnmLslMgXCLkENgi1NnJMhYVOnckxGDZk54hqP\n"
        "9RbLnkkCgYEA/yKuWEvgdzYRYkqpzB0l9ka7Y00CV4Dha9Of6GjQi9i4VCJ/UFVr\n"
        "UlhTo5y0ZzpcDAPcoZf5CFZsD90a/BpQ3YTtdln2MMCL/Kr3QFmetkmDrt+3wYnX\n"
        "sKESfsa2nZdOATRpl1antpwyD4RzsAeOPwBiACj4fkq5iZJBSI0bxrMCgYEA8GFi\n"
        "qAjgKh81/Uai6KWTOW2kX02LEMVRrnZLQ9VPPLGid4KZDDk1/dEfxjjkcyOxX1Ux\n"
        "Klu4W8ZEdZyzPcJrfk7PdopfGOfrhWzkREK9C40H7ou/1jUecq/STPfSOmxh3Y+D\n"
        "ifMNO6z4sQAHx8VaHaxVsJ7SGR/spr0pkZL+NXsCgYEA84rIgBKWB1W+TGRXJzdf\n"
        "yHIGaCjXpm2pQMN3LmP3RrcuZWm0vBt94dHcrR5l+u/zc6iwEDTAjJvqdU4rdyEr\n"
        "tfkwr7v6TNlQB3WvpWanIPyVzfVSNFX/ZWSsAgZvxYjr9ixw6vzWBXOeOb/Gqu7b\n"
        "cvpLkjmJ0wxDhbXtyXKhZA8CgYBZyvcQb+hUs732M4mtQBSD0kohc5TsGdlOQ1AQ\n"
        "McFcmbpnzDghkclyW8jzwdLMk9uxEeDAwuxWE/UEvhlSi6qdzxC+Zifp5NBc0fVe\n"
        "7lMx2mfJGxj5CnSqQLVdHQHB4zSXkAGB6XHbBd0MOUeuvzDPfs2voVQ4IG3FR0oc\n"
        "3/znuwKBgQChZGH3McQcxmLA28aUwOVbWssfXKdDCsiJO+PEXXlL0maO3SbnFn+Q\n"
        "Tyf8oHI5cdP7AbwDSx9bUfRPjg9dKKmATBFr2bn216pjGxK0OjYOCntFTVr0psRB\n"
        "CrKg52Qrq71/2l4V2NLQZU40Dr1bN9V+Ftd9L0pvpCAEAWpIbLXGDw==\n"
        "-----END RSA PRIVATE KEY-----"
    )

    pubkey_data = (
        "-----BEGIN PUBLIC KEY-----\n"
        "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA75GR6ZTv5JOv90Vq8tKh\n"
        "KC7YQnhDIo2hM0HVziTEk5R4UQBWa0CKytFMbTONY2msEDwX9iA0x7F5Lgj0X8eD\n"
        "4ZMsYqLzqjWMekLC8bjhxc+EuPo9Dygu3mJ2VgRC7XhlFpmdo5NN8J2E7B/CNB3R\n"
        "4hOcMMZNZdi0xLtFoTfwU61UPfFX14mV2laqLbvDEfQLJhUTDeFFV8EN5Z4H1ttL\n"
        "P3sMXJvc3EvM0JiDVj4l1TWFUHHzeFgCA1Im0lv8i7PFrgW7nyMfK9uDSsUmIp7k\n"
        "6ai4tVzwkTmV5PsriP1ju88Lo3MB4/sUmDv/JmlZ9YyzTO3Po8Uz3Aeq9HJWyBWH\n"
        "AQIDAQAB\n"
        "-----END PUBLIC KEY-----"
    )

    hello_world = b"hello, world"

    hello_world_sig = (
        b"\x63\xa0\x70\xd2\xe4\xd4\x6b\x8a\xa2\x59\x27\x5f\x00\x69"
        b"\x1e\x3c\x50\xed\x50\x13\x09\x80\xe3\x47\x4e\x14\xb5\x7c"
        b"\x07\x26\x4e\x20\x74\xea\x0e\xf8\xda\xff\x1e\x57\x8c\x67"
        b"\x76\x73\xaa\xea\x0f\x0a\xe7\xa2\xe3\x88\xfc\x09\x87\x36"
        b"\x01\x3a\xb7\x4c\x40\xe0\xf4\x54\xc5\xf1\xaa\xb2\x1d\x7f"
        b"\xb6\xd3\xa8\xdd\x28\x69\x8b\x88\xe4\x42\x1e\x48\x3e\x1f"
        b"\xe2\x2b\x3c\x7c\x85\x11\xe9\x59\xd7\xf3\xc2\x21\xd3\x55"
        b"\xcb\x9c\x3c\x93\xcc\x20\xdf\x64\x81\xd0\x0d\xbf\x8e\x8d"
        b"\x47\xec\x1d\x9e\x27\xec\x12\xed\x8b\x5f\xd6\x1d\xec\x8d"
        b"\x77\x5a\x58\x8a\x24\xb6\x0f\x12\xb7\x51\xef\x7d\x85\x0f"
        b"\x49\x39\x02\x81\x15\x08\x70\xd6\xe0\x0b\x31\xff\x5f\xf9"
        b"\xd1\x92\x38\x59\x8c\x22\x9c\xbb\xbf\xcf\x85\x34\xe2\x47"
        b"\xf5\xe2\xaa\xb4\x62\x33\x3c\x13\x78\x33\x87\x08\x9e\xb5"
        b"\xbc\x5d\xc1\xbf\x79\x7c\xfa\x5f\x06\x6a\x3b\x17\x40\x09"
        b"\xb9\x09\xbf\x32\xc3\x00\xe2\xbc\x91\x77\x14\xa5\x23\xf5"
        b"\xf5\xf1\x09\x12\x38\xda\x3b\x6a\x82\x81\x7b\x5e\x1c\xcb"
        b"\xaa\x36\x9b\x08\x36\x03\x14\x96\xa3\x31\x39\x59\x16\x75"
        b"\xc9\xb6\x66\x94\x1b\x97\xff\xc8\xa1\xe3\x21\x35\x23\x06"
        b"\x4c\x9b\xf4\xee"
    )

    def test_signer(self):
        with self.assertRaises(ValueError):
            signer = RSAX931Signer("bogus key data")
        with self.assertRaises(ValueError):
            signer = RSAX931Signer(RSAX931Test.pubkey_data)

        signer = RSAX931Signer(RSAX931Test.privkey_data)
        with self.assertRaises(ValueError):
            signer.sign("x" * 255)  # message too long

        sig = signer.sign(RSAX931Test.hello_world)
        self.assertEqual(RSAX931Test.hello_world_sig, sig)

    def test_verifier(self):
        with self.assertRaises(ValueError):
            verifier = RSAX931Verifier("bogus key data")
        with self.assertRaises(ValueError):
            verifier = RSAX931Verifier(RSAX931Test.privkey_data)

        verifier = RSAX931Verifier(RSAX931Test.pubkey_data)
        with self.assertRaises(ValueError):
            verifier.verify("")
        with self.assertRaises(ValueError):
            verifier.verify(RSAX931Test.hello_world_sig + b"junk")

        msg = verifier.verify(RSAX931Test.hello_world_sig)
        self.assertEqual(RSAX931Test.hello_world, msg)

    @skipIf(not salt.utils.platform.is_windows(), "Host OS is not Windows.")
    def test_find_libcrypto_win32(self):
        """
        Test _find_libcrypto on Windows hosts.
        """
        lib_path = _find_libcrypto()
        self.assertEqual(lib_path, "libeay32")

    @skipIf(
        not getattr(sys, "frozen", False) and not salt.utils.platform.is_smartos(),
        "Host OS is not SmartOS.",
    )
    def test_find_libcrypto_smartos(self):
        """
        Test _find_libcrypto on a SmartOS host.
        """
        lib_path = _find_libcrypto()
        self.assertTrue(
            fnmatch.fnmatch(
                lib_path, os.path.join(os.path.dirname(sys.executable), "libcrypto*")
            )
        )

    @skipIf(not salt.utils.platform.is_sunos(), "Host OS is not Solaris-like.")
    def test_find_libcrypto_sunos(self):
        """
        Test _find_libcrypto on a Solaris-like host.
        """
        lib_path = _find_libcrypto()
        passed = False
        for i in ("/opt/local/lib/libcrypto.so*", "/opt/tools/lib/libcrypto.so*"):
            if fnmatch.fnmatch(lib_path, i):
                passed = True
                break
        self.assertTrue(passed)

    @skipIf(not salt.utils.platform.is_aix(), "Host OS is not IBM AIX.")
    def test_find_libcrypto_aix(self):
        """
        Test _find_libcrypto on an IBM AIX host.
        """
        lib_path = _find_libcrypto()
        if os.path.isdir("/opt/salt/lib"):
            self.assertTrue(fnmatch.fnmatch(lib_path, "/opt/salt/lib/libcrypto.so*"))
        else:
            self.assertTrue(
                fnmatch.fnmatch(lib_path, "/opt/freeware/lib/libcrypto.so*")
            )

    @skipIf(not salt.utils.platform.is_darwin(), "Host OS is not Darwin-like or macOS.")
    @patch.object(platform, "mac_ver", lambda: ("10.14.2", (), ""))
    @patch.object(glob, "glob", lambda _: [])
    def test_find_libcrypto_with_system_and_not_catalina(self):
        """
        Test _find_libcrypto on a Catalina-like macOS host, simulate
        not finding any other libcryptos and just defaulting to system.
        """
        lib_path = _find_libcrypto()
        passed = False
        for i in (
            "/opt/salt/lib/libcrypto.dylib",
            "/usr/local/opt/openssl/lib/libcrypto.dylib",
            "/usr/local/opt/openssl@*/lib/libcrypto.dylib",
            "/opt/local/lib/libcrypto.dylib",
            "/usr/lib/libcrypto.*.dylib",
        ):
            if fnmatch.fnmatch(lib_path, i):
                passed = True
                break
        self.assertFalse(passed)
        self.assertEqual(lib_path, "/usr/lib/libcrypto.dylib")

    @skipIf(not salt.utils.platform.is_darwin(), "Host OS is not Darwin-like or macOS.")
    @patch.object(platform, "mac_ver", lambda: ("10.15.2", (), ""))
    def test_find_libcrypto_darwin_catalina(self):
        """
        Test _find_libcrypto on a Darwin-like  macOS host where there isn't a
        lacation returned by ctypes.util.find_library()
        """
        lib_path = _find_libcrypto()
        passed = False
        for i in (
            "/opt/salt/lib/libcrypto.dylib",
            "/usr/local/opt/openssl/lib/libcrypto.dylib",
            "/usr/local/opt/openssl@*/lib/libcrypto.dylib",
            "/opt/local/lib/libcrypto.dylib",
            "/usr/lib/libcrypto.*.dylib",
        ):
            if fnmatch.fnmatch(lib_path, i):
                passed = True
                break
        self.assertTrue(passed)

    @patch.object(ctypes.util, "find_library", lambda a: None)
    @patch.object(glob, "glob", lambda a: [])
    @patch.object(sys, "platform", "unknown")
    @patch.object(salt.utils.platform, "is_darwin", lambda: False)
    def test_find_libcrypto_unsupported(self):
        """
        Ensure that _find_libcrypto works correctly on an unsupported host OS.
        """
        with self.assertRaises(OSError):
            _find_libcrypto()

    def test_load_libcrypto(self):
        """
        Test _load_libcrypto generically.
        """
        lib = _load_libcrypto()
        self.assertTrue(isinstance(lib, ctypes.CDLL))
        # Try to cover both pre and post OpenSSL 1.1.
        self.assertTrue(
            hasattr(lib, "OpenSSL_version_num")
            or hasattr(lib, "OPENSSL_init_crypto")
            or hasattr(lib, "OPENSSL_no_config")
        )