pygost/test_pfx.py

   1 # coding: utf-8
   2 # PyGOST -- Pure Python GOST cryptographic functions library
   3 # Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, version 3 of the License.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 from base64 import b64decode
  18 from hmac import new as hmac_new
  19 from unittest import skipIf
  20 from unittest import TestCase
  21
  22 from pygost.gost28147 import cfb_decrypt
  23 from pygost.gost34112012512 import GOST34112012512
  24 from pygost.gost34112012512 import pbkdf2 as gost34112012_pbkdf2
  25 from pygost.utils import hexdec
  26
  27
  28 try:
  29     from pygost.asn1schemas.pfx import OctetStringSafeContents
  30     from pygost.asn1schemas.pfx import PFX
  31     from pygost.asn1schemas.pfx import PKCS8ShroudedKeyBag
  32     from pygost.asn1schemas.pfx import SafeContents
  33 except ImportError:
  34     pyderasn_exists = False
  35 else:
  36     pyderasn_exists = True
  37
  38
  39 @skipIf(not pyderasn_exists, "PyDERASN dependency is required")
  40 class TestPFX(TestCase):
  41     """PFX test vectors from "Транспортный ключевой контейнер" (R50.1.112-2016.pdf)
  42     """
  43     pfx_raw = b64decode("""
  44 MIIFqgIBAzCCBSsGCSqGSIb3DQEHAaCCBRwEggUYMIIFFDCCASIGCSqGSIb3DQEH
  45 AaCCARMEggEPMIIBCzCCAQcGCyqGSIb3DQEMCgECoIHgMIHdMHEGCSqGSIb3DQEF
  46 DTBkMEEGCSqGSIb3DQEFDDA0BCD5qZr0TTIsBvdgUoq/zFwOzdyJohj6/4Wiyccg
  47 j9AK/QICB9AwDAYIKoUDBwEBBAIFADAfBgYqhQMCAhUwFQQI3Ip/Vp0IsyIGCSqF
  48 AwcBAgUBAQRoSfLhgx9s/zn+BjnhT0ror07vS55Ys5hgvVpWDx4mXGWWyez/2sMc
  49 aFgSr4H4UTGGwoMynGLpF1IOVo+bGJ0ePqHB+gS5OL9oV+PUmZ/ELrRENKlCDqfY
  50 WvpSystX29CvCFrnTnDsbBYxFTATBgkqhkiG9w0BCRUxBgQEAQAAADCCA+oGCSqG
  51 SIb3DQEHBqCCA9swggPXAgEAMIID0AYJKoZIhvcNAQcBMHEGCSqGSIb3DQEFDTBk
  52 MEEGCSqGSIb3DQEFDDA0BCCJTJLZQRi1WIpQHzyjXbq7+Vw2+1280C45x8ff6kMS
  53 VAICB9AwDAYIKoUDBwEBBAIFADAfBgYqhQMCAhUwFQQIxepowwvS11MGCSqFAwcB
  54 AgUBAYCCA06n09P/o+eDEKoSWpvlpOLKs7dKmVquKzJ81nCngvLQ5fEWL1WkxwiI
  55 rEhm53JKLD0wy4hekalEk011Bvc51XP9gkDkmaoBpnV/TyKIY35wl6ATfeGXno1M
  56 KoA+Ktdhv4gLnz0k2SXdkUj11JwYskXue+REA0p4m2ZsoaTmvoODamh9JeY/5Qjy
  57 Xe58CGnyXFzX3eU86qs4WfdWdS3NzYYOk9zzVl46le9u79O/LnW2j4n2of/Jpk/L
  58 YjrRmz5oYeQOqKOKhEyhpO6e+ejr6laduEv7TwJQKRNiygogbVvkNn3VjHTSOUG4
  59 W+3NRPhjb0jD9obdyx6MWa6O3B9bUzFMNav8/gYn0vTDxqXMLy/92oTngNrVx6Gc
  60 cNl128ISrDS6+RxtAMiEBRK6xNkemqX5yNXG5GrLQQFGP6mbs2nNpjKlgj3pljmX
  61 Eky2/G78XiJrv02OgGs6CKnI9nMpa6N7PBHV34MJ6EZzWOWDRQ420xk63mnicrs0
  62 WDVJ0xjdu4FW3iEk02EaiRTvGBpa6GL7LBp6QlaXSSwONx725cyRsL9cTlukqXER
  63 WHDlMpjYLbkGZRrCc1myWgEfsputfSIPNF/oLv9kJNWacP3uuDOfecg3us7eg2OA
  64 xo5zrYfn39GcBMF1WHAYRO/+PnJb9jrDuLAE8+ONNqjNulWNK9CStEhb6Te+yE6q
  65 oeP6hJjFLi+nFLE9ymIo0A7gLQD5vzFvl+7v1ZNVnQkwRUsWoRiEVVGnv3Z1iZU6
  66 xStxgoHMl62V/P5cz4dr9vJM2adEWNZcVXl6mk1H8DRc1sRGnvs2l237oKWRVntJ
  67 hoWnZ8qtD+3ZUqsX79QhVzUQBzKuBt6jwNhaHLGl5B+Or/zA9FezsOh6+Uc+fZaV
  68 W7fFfeUyWwGy90XD3ybTrjzep9f3nt55Z2c+fu2iEwhoyImWLuC3+CVhf9Af59j9
  69 8/BophMJuATDJEtgi8rt4vLnfxKu250Mv2ZpbfF69EGTgFYbwc55zRfaUG9zlyCu
  70 1YwMJ6HC9FUVtJp9gObSrirbzTH7mVaMjQkBLotazWbegzI+be8V3yT06C+ehD+2
  71 GdLWAVs9hp8gPHEUShb/XrgPpDSJmFlOiyeOFBO/j4edDACKqVcwdjBOMAoGCCqF
  72 AwcBAQIDBEAIFX0fyZe20QKKhWm6WYX+S92Gt6zaXroXOvAmayzLfZ5Sd9C2t9zZ
  73 JSg6M8RBUYpw/8ym5ou1o2nDa09M5zF3BCCpzyCQBI+rzfISeKvPV1ROfcXiYU93
  74 mwcl1xQV2G5/fgICB9A=
  75     """)
  76     password = u'Пароль для PFX'
  77
  78     def test_shrouded_key_bag(self):
  79         private_key_info_expected = b64decode(b"""
  80 MGYCAQAwHwYIKoUDBwEBAQEwEwYHKoUDAgIjAQYIKoUDBwEBAgIEQEYbRu86z+1JFKDcPDN9UbTG
  81 G2ki9enTqos4KpUU0j9IDpl1UXiaA1YDIwUjlAp+81GkLmyt8Fw6Gt/X5JZySAY=
  82         """)
  83
  84         pfx, tail = PFX().decode(self.pfx_raw)
  85         self.assertSequenceEqual(tail, b"")
  86         _, outer_safe_contents = pfx["authSafe"]["content"].defined
  87         safe_contents, tail = OctetStringSafeContents().decode(
  88             bytes(outer_safe_contents[0]["bagValue"]),
  89         )
  90         self.assertSequenceEqual(tail, b"")
  91         safe_bag = safe_contents[0]
  92         shrouded_key_bag, tail = PKCS8ShroudedKeyBag().decode(
  93             bytes(safe_bag["bagValue"]),
  94         )
  95         self.assertSequenceEqual(tail, b"")
  96         _, pbes2_params = shrouded_key_bag["encryptionAlgorithm"]["parameters"].defined
  97         _, pbkdf2_params = pbes2_params["keyDerivationFunc"]["parameters"].defined
  98         _, enc_scheme_params = pbes2_params["encryptionScheme"]["parameters"].defined
  99
 100         key = gost34112012_pbkdf2(
 101             password=self.password.encode("utf-8"),
 102             salt=bytes(pbkdf2_params["salt"]["specified"]),
 103             iterations=int(pbkdf2_params["iterationCount"]),
 104             dklen=32,
 105         )
 106         # key = hexdec("309dd0354c5603739403f2335e9e2055138f8b5c98b63009de0635eea1fd7ba8")
 107         self.assertSequenceEqual(
 108             cfb_decrypt(
 109                 key,
 110                 bytes(shrouded_key_bag["encryptedData"]),
 111                 iv=bytes(enc_scheme_params["iv"]),
 112                 sbox="id-tc26-gost-28147-param-Z",
 113             ),
 114             private_key_info_expected,
 115         )
 116
 117     def test_encrypted_data(self):
 118         cert_bag_expected = b64decode(b"""
 119 MIIDSjCCA0YGCyqGSIb3DQEMCgEDoIIDHjCCAxoGCiqGSIb3DQEJFgGgggMKBIIDBjCCAwIwggKt
 120 oAMCAQICEAHQaF8xH5bAAAAACycJAAEwDAYIKoUDBwEBAwIFADBgMQswCQYDVQQGEwJSVTEVMBMG
 121 A1UEBwwM0JzQvtGB0LrQstCwMQ8wDQYDVQQKDAbQotCaMjYxKTAnBgNVBAMMIENBIGNlcnRpZmlj
 122 YXRlIChQS0NTIzEyIGV4YW1wbGUpMB4XDTE1MDMyNzA3MjUwMFoXDTIwMDMyNzA3MjMwMFowZDEL
 123 MAkGA1UEBhMCUlUxFTATBgNVBAcMDNCc0L7RgdC60LLQsDEPMA0GA1UECgwG0KLQmjI2MS0wKwYD
 124 VQQDDCRUZXN0IGNlcnRpZmljYXRlIDEgKFBLQ1MjMTIgZXhhbXBsZSkwZjAfBggqhQMHAQEBATAT
 125 BgcqhQMCAiMBBggqhQMHAQECAgNDAARA1xzymkpvr2dYJT8WTOX3Dt96/+hGsXNytUQpkWB5ImJM
 126 4tg9AsC4RIUwV5H41MhG0uBRFweTzN6AsAdBvhTClYEJADI3MDkwMDAxo4IBKTCCASUwKwYDVR0Q
 127 BCQwIoAPMjAxNTAzMjcwNzI1MDBagQ8yMDE2MDMyNzA3MjUwMFowDgYDVR0PAQH/BAQDAgTwMB0G
 128 A1UdDgQWBBQhWOsRQ68yYN2Utg/owHoWcqsVbTAdBgNVHSUEFjAUBggrBgEFBQcDAgYIKwYBBQUH
 129 AwQwDAYDVR0TAQH/BAIwADCBmQYDVR0jBIGRMIGOgBQmnc7Xh5ykb5t/BMwOkxA4drfEmqFkpGIw
 130 YDELMAkGA1UEBhMCUlUxFTATBgNVBAcMDNCc0L7RgdC60LLQsDEPMA0GA1UECgwG0KLQmjI2MSkw
 131 JwYDVQQDDCBDQSBjZXJ0aWZpY2F0ZSAoUEtDUyMxMiBleGFtcGxlKYIQAdBoXvL8TSAAAAALJwkA
 132 ATAMBggqhQMHAQEDAgUAA0EA9oq0Vvk8kkgIwkp0x0J5eKtia4MNTiwKAm7jgnCZIx3O98BThaTX
 133 3ZQhEo2RL9pTCPr6wFMheeJ+YdGMReXvsjEVMBMGCSqGSIb3DQEJFTEGBAQBAAAA
 134         """)
 135
 136         pfx, tail = PFX().decode(self.pfx_raw)
 137         self.assertSequenceEqual(tail, b"")
 138         _, outer_safe_contents = pfx["authSafe"]["content"].defined
 139         _, encrypted_data = outer_safe_contents[1]["bagValue"].defined
 140         _, pbes2_params = encrypted_data["encryptedContentInfo"]["contentEncryptionAlgorithm"]["parameters"].defined
 141         _, pbkdf2_params = pbes2_params["keyDerivationFunc"]["parameters"].defined
 142         _, enc_scheme_params = pbes2_params["encryptionScheme"]["parameters"].defined
 143         key = gost34112012_pbkdf2(
 144             password=self.password.encode("utf-8"),
 145             salt=bytes(pbkdf2_params["salt"]["specified"]),
 146             iterations=int(pbkdf2_params["iterationCount"]),
 147             dklen=32,
 148         )
 149         # key = hexdec("0e93d71339e7f53b79a0bc41f9109dd4fb60b30ae10736c1bb77b84c07681cfc")
 150         self.assertSequenceEqual(
 151             cfb_decrypt(
 152                 key,
 153                 bytes(encrypted_data["encryptedContentInfo"]["encryptedContent"]),
 154                 iv=bytes(enc_scheme_params["iv"]),
 155                 sbox="id-tc26-gost-28147-param-Z",
 156             ),
 157             cert_bag_expected,
 158         )
 159
 160     def test_mac(self):
 161         pfx, tail = PFX().decode(self.pfx_raw)
 162         self.assertSequenceEqual(tail, b"")
 163         _, outer_safe_contents = pfx["authSafe"]["content"].defined
 164         mac_data = pfx["macData"]
 165         mac_key = gost34112012_pbkdf2(
 166             password=self.password.encode('utf-8'),
 167             salt=bytes(mac_data["macSalt"]),
 168             iterations=int(mac_data["iterations"]),
 169             dklen=96,
 170         )[-32:]
 171         # mac_key = hexdec("cadbfbf3bceaa9b79f651508fac5abbeb4a13d0bd0e1876bd3c3efb2112128a5")
 172         self.assertSequenceEqual(
 173             hmac_new(
 174                 key=mac_key,
 175                 msg=SafeContents(outer_safe_contents).encode(),
 176                 digestmod=GOST34112012512,
 177             ).digest(),
 178             bytes(mac_data["mac"]["digest"]),
 179         )