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"""tests for passlib.utils.scrypt""" #============================================================================= # imports #============================================================================= # core from binascii import hexlify import hashlib import logging; log = logging.getLogger(__name__) import struct import warnings warnings.filterwarnings("ignore", ".using builtin scrypt backend.") # site # pkg from passlib import exc from passlib.utils import getrandbytes from passlib.utils.compat import PYPY, u, bascii_to_str from passlib.utils.decor import classproperty from passlib.tests.utils import TestCase, skipUnless, TEST_MODE, hb # subject from passlib.crypto import scrypt as scrypt_mod # local __all__ = [ "ScryptEngineTest", "BuiltinScryptTest", "FastScryptTest", ] #============================================================================= # support functions #============================================================================= def hexstr(data): """return bytes as hex str""" return bascii_to_str(hexlify(data)) def unpack_uint32_list(data, check_count=None): """unpack bytes as list of uint32 values""" count = len(data) // 4 assert check_count is None or check_count == count return struct.unpack("<%dI" % count, data) def seed_bytes(seed, count): """ generate random reference bytes from specified seed. used to generate some predictable test vectors. """ if hasattr(seed, "encode"): seed = seed.encode("ascii") buf = b'' i = 0 while len(buf) < count: buf += hashlib.sha256(seed + struct.pack("<I", i)).digest() i += 1 return buf[:count] #============================================================================= # test builtin engine's internals #============================================================================= class ScryptEngineTest(TestCase): descriptionPrefix = "passlib.crypto.scrypt._builtin" def test_smix(self): """smix()""" from passlib.crypto.scrypt._builtin import ScryptEngine rng = self.getRandom() #----------------------------------------------------------------------- # test vector from (expired) scrypt rfc draft # (https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01, section 9) #----------------------------------------------------------------------- input = hb(""" f7 ce 0b 65 3d 2d 72 a4 10 8c f5 ab e9 12 ff dd 77 76 16 db bb 27 a7 0e 82 04 f3 ae 2d 0f 6f ad 89 f6 8f 48 11 d1 e8 7b cc 3b d7 40 0a 9f fd 29 09 4f 01 84 63 95 74 f3 9a e5 a1 31 52 17 bc d7 89 49 91 44 72 13 bb 22 6c 25 b5 4d a8 63 70 fb cd 98 43 80 37 46 66 bb 8f fc b5 bf 40 c2 54 b0 67 d2 7c 51 ce 4a d5 fe d8 29 c9 0b 50 5a 57 1b 7f 4d 1c ad 6a 52 3c da 77 0e 67 bc ea af 7e 89 """) output = hb(""" 79 cc c1 93 62 9d eb ca 04 7f 0b 70 60 4b f6 b6 2c e3 dd 4a 96 26 e3 55 fa fc 61 98 e6 ea 2b 46 d5 84 13 67 3b 99 b0 29 d6 65 c3 57 60 1f b4 26 a0 b2 f4 bb a2 00 ee 9f 0a 43 d1 9b 57 1a 9c 71 ef 11 42 e6 5d 5a 26 6f dd ca 83 2c e5 9f aa 7c ac 0b 9c f1 be 2b ff ca 30 0d 01 ee 38 76 19 c4 ae 12 fd 44 38 f2 03 a0 e4 e1 c4 7e c3 14 86 1f 4e 90 87 cb 33 39 6a 68 73 e8 f9 d2 53 9a 4b 8e """) # NOTE: p value should be ignored, so testing w/ random inputs. engine = ScryptEngine(n=16, r=1, p=rng.randint(1, 1023)) self.assertEqual(engine.smix(input), output) def test_bmix(self): """bmix()""" from passlib.crypto.scrypt._builtin import ScryptEngine rng = self.getRandom() # NOTE: bmix() call signature currently takes in list of 32r uint32 elements, # and writes to target buffer of same size. def check_bmix(r, input, output): """helper to check bmix() output against reference""" # NOTE: n & p values should be ignored, so testing w/ rng inputs. # * target buffer contents should be ignored, so testing w/ random inputs. engine = ScryptEngine(r=r, n=1 << rng.randint(1, 32), p=rng.randint(1, 1023)) target = [rng.randint(0, 1 << 32) for _ in range((2 * r) * 16)] engine.bmix(input, target) self.assertEqual(target, list(output)) # ScryptEngine special-cases bmix() for r=1. # this removes the special case patching, so we also test original bmix function. if r == 1: del engine.bmix target = [rng.randint(0, 1 << 32) for _ in range((2 * r) * 16)] engine.bmix(input, target) self.assertEqual(target, list(output)) #----------------------------------------------------------------------- # test vector from (expired) scrypt rfc draft # (https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01, section 8) #----------------------------------------------------------------------- # NOTE: this pair corresponds to the first input & output pair # from the test vector in test_smix(), above. # NOTE: original reference lists input & output as two separate 64 byte blocks. # current internal representation used by bmix() uses single 2r16 array of uint32, # combining all the B blocks into a single flat array. input = unpack_uint32_list(hb(""" f7 ce 0b 65 3d 2d 72 a4 10 8c f5 ab e9 12 ff dd 77 76 16 db bb 27 a7 0e 82 04 f3 ae 2d 0f 6f ad 89 f6 8f 48 11 d1 e8 7b cc 3b d7 40 0a 9f fd 29 09 4f 01 84 63 95 74 f3 9a e5 a1 31 52 17 bc d7 89 49 91 44 72 13 bb 22 6c 25 b5 4d a8 63 70 fb cd 98 43 80 37 46 66 bb 8f fc b5 bf 40 c2 54 b0 67 d2 7c 51 ce 4a d5 fe d8 29 c9 0b 50 5a 57 1b 7f 4d 1c ad 6a 52 3c da 77 0e 67 bc ea af 7e 89 """), 32) output = unpack_uint32_list(hb(""" a4 1f 85 9c 66 08 cc 99 3b 81 ca cb 02 0c ef 05 04 4b 21 81 a2 fd 33 7d fd 7b 1c 63 96 68 2f 29 b4 39 31 68 e3 c9 e6 bc fe 6b c5 b7 a0 6d 96 ba e4 24 cc 10 2c 91 74 5c 24 ad 67 3d c7 61 8f 81 20 ed c9 75 32 38 81 a8 05 40 f6 4c 16 2d cd 3c 21 07 7c fe 5f 8d 5f e2 b1 a4 16 8f 95 36 78 b7 7d 3b 3d 80 3b 60 e4 ab 92 09 96 e5 9b 4d 53 b6 5d 2a 22 58 77 d5 ed f5 84 2c b9 f1 4e ef e4 25 """), 32) # check_bmix(1, input, output) #----------------------------------------------------------------------- # custom test vector for r=2 # used to check for bmix() breakage while optimizing implementation. #----------------------------------------------------------------------- r = 2 input = unpack_uint32_list(seed_bytes("bmix with r=2", 128 * r)) output = unpack_uint32_list(hb(""" ba240854954f4585f3d0573321f10beee96f12acdc1feb498131e40512934fd7 43e8139c17d0743c89d09ac8c3582c273c60ab85db63e410d049a9e17a42c6a1 6c7831b11bf370266afdaff997ae1286920dea1dedf0f4a1795ba710ba9017f1 a374400766f13ebd8969362de2d153965e9941bdde0768fa5b53e8522f116ce0 d14774afb88f46cd919cba4bc64af7fca0ecb8732d1fc2191e0d7d1b6475cb2e e3db789ee478d056c4eb6c6e28b99043602dbb8dfb60c6e048bf90719da8d57d 3c42250e40ab79a1ada6aae9299b9790f767f54f388d024a1465b30cbbe9eb89 002d4f5c215c4259fac4d083bac5fb0b47463747d568f40bb7fa87c42f0a1dc1 """), 32 * r) check_bmix(r, input, output) #----------------------------------------------------------------------- # custom test vector for r=3 # used to check for bmix() breakage while optimizing implementation. #----------------------------------------------------------------------- r = 3 input = unpack_uint32_list(seed_bytes("bmix with r=3", 128 * r)) output = unpack_uint32_list(hb(""" 11ddd8cf60c61f59a6e5b128239bdc77b464101312c88bd1ccf6be6e75461b29 7370d4770c904d0b09c402573cf409bf2db47b91ba87d5a3de469df8fb7a003c 95a66af96dbdd88beddc8df51a2f72a6f588d67e7926e9c2b676c875da13161e b6262adac39e6b3003e9a6fbc8c1a6ecf1e227c03bc0af3e5f8736c339b14f84 c7ae5b89f5e16d0faf8983551165f4bb712d97e4f81426e6b78eb63892d3ff54 80bf406c98e479496d0f76d23d728e67d2a3d2cdbc4a932be6db36dc37c60209 a5ca76ca2d2979f995f73fe8182eefa1ce0ba0d4fc27d5b827cb8e67edd6552f 00a5b3ab6b371bd985a158e728011314eb77f32ade619b3162d7b5078a19886c 06f12bc8ae8afa46489e5b0239954d5216967c928982984101e4a88bae1f60ae 3f8a456e169a8a1c7450e7955b8a13a202382ae19d41ce8ef8b6a15eeef569a7 20f54c48e44cb5543dda032c1a50d5ddf2919030624978704eb8db0290052a1f 5d88989b0ef931b6befcc09e9d5162320e71e80b89862de7e2f0b6c67229b93f """), 32 * r) check_bmix(r, input, output) #----------------------------------------------------------------------- # custom test vector for r=4 # used to check for bmix() breakage while optimizing implementation. #----------------------------------------------------------------------- r = 4 input = unpack_uint32_list(seed_bytes("bmix with r=4", 128 * r)) output = unpack_uint32_list(hb(""" 803fcf7362702f30ef43250f20bc6b1b8925bf5c4a0f5a14bbfd90edce545997 3047bd81655f72588ca93f5c2f4128adaea805e0705a35e14417101fdb1c498c 33bec6f4e5950d66098da8469f3fe633f9a17617c0ea21275185697c0e4608f7 e6b38b7ec71704a810424637e2c296ca30d9cbf8172a71a266e0393deccf98eb abc430d5f144eb0805308c38522f2973b7b6a48498851e4c762874497da76b88 b769b471fbfc144c0e8e859b2b3f5a11f51604d268c8fd28db55dff79832741a 1ac0dfdaff10f0ada0d93d3b1f13062e4107c640c51df05f4110bdda15f51b53 3a75bfe56489a6d8463440c78fb8c0794135e38591bdc5fa6cec96a124178a4a d1a976e985bfe13d2b4af51bd0fc36dd4cfc3af08efe033b2323a235205dc43d e57778a492153f9527338b3f6f5493a03d8015cd69737ee5096ad4cbe660b10f b75b1595ddc96e3748f5c9f61fba1ef1f0c51b6ceef8bbfcc34b46088652e6f7 edab61521cbad6e69b77be30c9c97ea04a4af359dafc205c7878cc9a6c5d122f 8d77f3cbe65ab14c3c491ef94ecb3f5d2c2dd13027ea4c3606262bb3c9ce46e7 dc424729dc75f6e8f06096c0ad8ad4d549c42f0cad9b33cb95d10fb3cadba27c 5f4bf0c1ac677c23ba23b64f56afc3546e62d96f96b58d7afc5029f8168cbab4 533fd29fc83c8d2a32b81923992e4938281334e0c3694f0ee56f8ff7df7dc4ae """), 32 * r) check_bmix(r, input, output) def test_salsa(self): """salsa20()""" from passlib.crypto.scrypt._builtin import salsa20 # NOTE: salsa2() currently operates on lists of 16 uint32 elements, # which is what unpack_uint32_list(hb(() is for... #----------------------------------------------------------------------- # test vector from (expired) scrypt rfc draft # (https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01, section 7) #----------------------------------------------------------------------- # NOTE: this pair corresponds to the first input & output pair # from the test vector in test_bmix(), above. input = unpack_uint32_list(hb(""" 7e 87 9a 21 4f 3e c9 86 7c a9 40 e6 41 71 8f 26 ba ee 55 5b 8c 61 c1 b5 0d f8 46 11 6d cd 3b 1d ee 24 f3 19 df 9b 3d 85 14 12 1e 4b 5a c5 aa 32 76 02 1d 29 09 c7 48 29 ed eb c6 8d b8 b8 c2 5e """)) output = unpack_uint32_list(hb(""" a4 1f 85 9c 66 08 cc 99 3b 81 ca cb 02 0c ef 05 04 4b 21 81 a2 fd 33 7d fd 7b 1c 63 96 68 2f 29 b4 39 31 68 e3 c9 e6 bc fe 6b c5 b7 a0 6d 96 ba e4 24 cc 10 2c 91 74 5c 24 ad 67 3d c7 61 8f 81 """)) self.assertEqual(salsa20(input), output) #----------------------------------------------------------------------- # custom test vector, # used to check for salsa20() breakage while optimizing _gen_files output. #----------------------------------------------------------------------- input = list(range(16)) output = unpack_uint32_list(hb(""" f518dd4fb98883e0a87954c05cab867083bb8808552810752285a05822f56c16 9d4a2a0fd2142523d758c60b36411b682d53860514b871d27659042a5afa475d """)) self.assertEqual(salsa20(input), output) #============================================================================= # eof #============================================================================= #============================================================================= # test scrypt #============================================================================= class _CommonScryptTest(TestCase): """ base class for testing various scrypt backends against same set of reference vectors. """ #============================================================================= # class attrs #============================================================================= @classproperty def descriptionPrefix(cls): return "passlib.utils.scrypt.scrypt() <%s backend>" % cls.backend backend = None #============================================================================= # setup #============================================================================= def setUp(self): assert self.backend scrypt_mod._set_backend(self.backend) super(_CommonScryptTest, self).setUp() #============================================================================= # reference vectors #============================================================================= reference_vectors = [ # entry format: (secret, salt, n, r, p, keylen, result) #------------------------------------------------------------------------ # test vectors from scrypt whitepaper -- # http://www.tarsnap.com/scrypt/scrypt.pdf, appendix b # # also present in (expired) scrypt rfc draft -- # https://tools.ietf.org/html/draft-josefsson-scrypt-kdf-01, section 11 #------------------------------------------------------------------------ ("", "", 16, 1, 1, 64, hb(""" 77 d6 57 62 38 65 7b 20 3b 19 ca 42 c1 8a 04 97 f1 6b 48 44 e3 07 4a e8 df df fa 3f ed e2 14 42 fc d0 06 9d ed 09 48 f8 32 6a 75 3a 0f c8 1f 17 e8 d3 e0 fb 2e 0d 36 28 cf 35 e2 0c 38 d1 89 06 """)), ("password", "NaCl", 1024, 8, 16, 64, hb(""" fd ba be 1c 9d 34 72 00 78 56 e7 19 0d 01 e9 fe 7c 6a d7 cb c8 23 78 30 e7 73 76 63 4b 37 31 62 2e af 30 d9 2e 22 a3 88 6f f1 09 27 9d 98 30 da c7 27 af b9 4a 83 ee 6d 83 60 cb df a2 cc 06 40 """)), # NOTE: the following are skipped for all backends unless TEST_MODE="full" ("pleaseletmein", "SodiumChloride", 16384, 8, 1, 64, hb(""" 70 23 bd cb 3a fd 73 48 46 1c 06 cd 81 fd 38 eb fd a8 fb ba 90 4f 8e 3e a9 b5 43 f6 54 5d a1 f2 d5 43 29 55 61 3f 0f cf 62 d4 97 05 24 2a 9a f9 e6 1e 85 dc 0d 65 1e 40 df cf 01 7b 45 57 58 87 """)), # NOTE: the following are always skipped for the builtin backend, # (just takes too long to be worth it) ("pleaseletmein", "SodiumChloride", 1048576, 8, 1, 64, hb(""" 21 01 cb 9b 6a 51 1a ae ad db be 09 cf 70 f8 81 ec 56 8d 57 4a 2f fd 4d ab e5 ee 98 20 ad aa 47 8e 56 fd 8f 4b a5 d0 9f fa 1c 6d 92 7c 40 f4 c3 37 30 40 49 e8 a9 52 fb cb f4 5c 6f a7 7a 41 a4 """)), ] def test_reference_vectors(self): """reference vectors""" for secret, salt, n, r, p, keylen, result in self.reference_vectors: if n >= 1024 and TEST_MODE(max="default"): # skip large values unless we're running full test suite continue if n > 16384 and self.backend == "builtin": # skip largest vector for builtin, takes WAAY too long # (46s under pypy, ~5m under cpython) continue log.debug("scrypt reference vector: %r %r n=%r r=%r p=%r", secret, salt, n, r, p) self.assertEqual(scrypt_mod.scrypt(secret, salt, n, r, p, keylen), result) #============================================================================= # fuzz testing #============================================================================= _already_tested_others = None def test_other_backends(self): """compare output to other backends""" # only run once, since test is symetric. # maybe this means it should go somewhere else? if self._already_tested_others: raise self.skipTest("already run under %r backend test" % self._already_tested_others) self._already_tested_others = self.backend rng = self.getRandom() # get available backends orig = scrypt_mod.backend available = set(name for name in scrypt_mod.backend_values if scrypt_mod._has_backend(name)) scrypt_mod._set_backend(orig) available.discard(self.backend) if not available: raise self.skipTest("no other backends found") warnings.filterwarnings("ignore", "(?i)using builtin scrypt backend", category=exc.PasslibSecurityWarning) # generate some random options, and cross-check output for _ in range(10): # NOTE: keeping values low due to builtin test secret = getrandbytes(rng, rng.randint(0, 64)) salt = getrandbytes(rng, rng.randint(0, 64)) n = 1 << rng.randint(1, 10) r = rng.randint(1, 8) p = rng.randint(1, 3) ks = rng.randint(1, 64) previous = None backends = set() for name in available: scrypt_mod._set_backend(name) self.assertNotIn(scrypt_mod._scrypt, backends) backends.add(scrypt_mod._scrypt) result = hexstr(scrypt_mod.scrypt(secret, salt, n, r, p, ks)) self.assertEqual(len(result), 2ks) if previous is not None: self.assertEqual(result, previous, msg="%r output differs from others %r: %r" % (name, available, [secret, salt, n, r, p, ks])) #============================================================================= # test input types #============================================================================= def test_backend(self): """backend management""" # clobber backend scrypt_mod.backend = None scrypt_mod._scrypt = None self.assertRaises(TypeError, scrypt_mod.scrypt, 's', 's', 2, 2, 2, 16) # reload backend scrypt_mod._set_backend(self.backend) self.assertEqual(scrypt_mod.backend, self.backend) scrypt_mod.scrypt('s', 's', 2, 2, 2, 16) # throw error for unknown backend self.assertRaises(ValueError, scrypt_mod._set_backend, 'xxx') self.assertEqual(scrypt_mod.backend, self.backend) def test_secret_param(self): """'secret' parameter""" def run_scrypt(secret): return hexstr(scrypt_mod.scrypt(secret, "salt", 2, 2, 2, 16)) # unicode TEXT = u("abc\u00defg") self.assertEqual(run_scrypt(TEXT), '05717106997bfe0da42cf4779a2f8bd8') # utf8 bytes TEXT_UTF8 = b'abc\xc3\x9efg' self.assertEqual(run_scrypt(TEXT_UTF8), '05717106997bfe0da42cf4779a2f8bd8') # latin1 bytes TEXT_LATIN1 = b'abc\xdefg' self.assertEqual(run_scrypt(TEXT_LATIN1), '770825d10eeaaeaf98e8a3c40f9f441d') # accept empty string self.assertEqual(run_scrypt(""), 'ca1399e5fae5d3b9578dcd2b1faff6e2') # reject other types self.assertRaises(TypeError, run_scrypt, None) self.assertRaises(TypeError, run_scrypt, 1) def test_salt_param(self): """'salt' parameter""" def run_scrypt(salt): return hexstr(scrypt_mod.scrypt("secret", salt, 2, 2, 2, 16)) # unicode TEXT = u("abc\u00defg") self.assertEqual(run_scrypt(TEXT), 'a748ec0f4613929e9e5f03d1ab741d88') # utf8 bytes TEXT_UTF8 = b'abc\xc3\x9efg' self.assertEqual(run_scrypt(TEXT_UTF8), 'a748ec0f4613929e9e5f03d1ab741d88') # latin1 bytes TEXT_LATIN1 = b'abc\xdefg' self.assertEqual(run_scrypt(TEXT_LATIN1), '91d056fb76fb6e9a7d1cdfffc0a16cd1') # reject other types self.assertRaises(TypeError, run_scrypt, None) self.assertRaises(TypeError, run_scrypt, 1) def test_n_param(self): """'n' (rounds) parameter""" def run_scrypt(n): return hexstr(scrypt_mod.scrypt("secret", "salt", n, 2, 2, 16)) # must be > 1, and a power of 2 self.assertRaises(ValueError, run_scrypt, -1) self.assertRaises(ValueError, run_scrypt, 0) self.assertRaises(ValueError, run_scrypt, 1) self.assertEqual(run_scrypt(2), 'dacf2bca255e2870e6636fa8c8957a66') self.assertRaises(ValueError, run_scrypt, 3) self.assertRaises(ValueError, run_scrypt, 15) self.assertEqual(run_scrypt(16), '0272b8fc72bc54b1159340ed99425233') def test_r_param(self): """'r' (block size) parameter""" def run_scrypt(r, n=2, p=2): return hexstr(scrypt_mod.scrypt("secret", "salt", n, r, p, 16)) # must be > 1 self.assertRaises(ValueError, run_scrypt, -1) self.assertRaises(ValueError, run_scrypt, 0) self.assertEqual(run_scrypt(1), '3d630447d9f065363b8a79b0b3670251') self.assertEqual(run_scrypt(2), 'dacf2bca255e2870e6636fa8c8957a66') self.assertEqual(run_scrypt(5), '114f05e985a903c27237b5578e763736') # reject rp >= 2*30 self.assertRaises(ValueError, run_scrypt, (1<<30), p=1) self.assertRaises(ValueError, run_scrypt, (1<<30) / 2, p=2) def test_p_param(self): """'p' (parallelism) parameter""" def run_scrypt(p, n=2, r=2): return hexstr(scrypt_mod.scrypt("secret", "salt", n, r, p, 16)) # must be > 1 self.assertRaises(ValueError, run_scrypt, -1) self.assertRaises(ValueError, run_scrypt, 0) self.assertEqual(run_scrypt(1), 'f2960ea8b7d48231fcec1b89b784a6fa') self.assertEqual(run_scrypt(2), 'dacf2bca255e2870e6636fa8c8957a66') self.assertEqual(run_scrypt(5), '848a0eeb2b3543e7f543844d6ca79782') # reject rp >= 2*30 self.assertRaises(ValueError, run_scrypt, (1<<30), r=1) self.assertRaises(ValueError, run_scrypt, (1<<30) / 2, r=2) def test_keylen_param(self): """'keylen' parameter""" rng = self.getRandom() def run_scrypt(keylen): return hexstr(scrypt_mod.scrypt("secret", "salt", 2, 2, 2, keylen)) # must be > 0 self.assertRaises(ValueError, run_scrypt, -1) self.assertRaises(ValueError, run_scrypt, 0) self.assertEqual(run_scrypt(1), 'da') # pick random value ksize = rng.randint(0, 1 << 10) self.assertEqual(len(run_scrypt(ksize)), 2ksize) # 2 hex chars per output # one more than upper bound self.assertRaises(ValueError, run_scrypt, ((2*32) - 1) 32 + 1) #============================================================================= # eoc #============================================================================= # NOTE: builtin version runs VERY slow (except under PyPy, where it's only 11x slower), # so skipping under quick test mode. @skipUnless(PYPY or TEST_MODE(min="default"), "skipped under current test mode") class BuiltinScryptTest(_CommonScryptTest): backend = "builtin" def setUp(self): super(BuiltinScryptTest, self).setUp() warnings.filterwarnings("ignore", "(?i)using builtin scrypt backend", category=exc.PasslibSecurityWarning) def test_missing_backend(self): """backend management -- missing backend""" if _can_import_scrypt(): raise self.skipTest("'scrypt' backend is present") self.assertRaises(exc.MissingBackendError, scrypt_mod._set_backend, 'scrypt') def _can_import_scrypt(): """check if scrypt package is importable""" try: import scrypt except ImportError as err: if "scrypt" in str(err): return False raise return True @skipUnless(_can_import_scrypt(), "'scrypt' package not found") class ScryptPackageTest(_CommonScryptTest): backend = "scrypt" def test_default_backend(self): """backend management -- default backend""" scrypt_mod._set_backend("default") self.assertEqual(scrypt_mod.backend, "scrypt") #============================================================================= # eof #=============================================================================

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