1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
from unittest import TestCase
from joserfc.jwe import (
JWERegistry,
encrypt_compact,
decrypt_compact,
CompactEncryption,
)
from joserfc.jwa import JWE_ENC_MODELS
from joserfc.jwk import RSAKey, ECKey, OctKey, OKPKey, KeySet
from joserfc.errors import (
SecurityWarning,
InvalidKeyLengthError,
MissingAlgorithmError,
MissingEncryptionError,
DecodeError,
ExceededSizeError,
InvalidHeaderValueError,
)
from joserfc.util import json_b64encode, urlsafe_b64encode
from tests.base import load_key
class TestJWECompact(TestCase):
def run_case(self, alg: str, enc: str, private_key, public_key):
protected = {"alg": alg, "enc": enc}
payload = b"hello"
result = encrypt_compact(
protected,
payload,
public_key,
algorithms=[alg, enc],
)
self.assertEqual(result.count("."), 4)
obj = decrypt_compact(
result,
private_key,
algorithms=[alg, enc],
)
self.assertEqual(obj.plaintext, payload)
def run_cases(self, names, private_key, public_key):
for alg in names:
for enc in JWE_ENC_MODELS:
self.run_case(alg, enc.name, private_key, public_key)
def test_RSA_alg(self):
private_key: RSAKey = load_key("rsa-openssl-private.pem")
public_key: RSAKey = load_key("rsa-openssl-public.pem")
algs = ["RSA1_5", "RSA-OAEP", "RSA-OAEP-256"]
self.run_cases(algs, private_key, public_key)
protected = {"alg": "RSA-OAEP", "enc": "A128CBC-HS256"}
value = encrypt_compact(protected, "i", private_key)
key2 = RSAKey.generate_key()
self.assertRaises(DecodeError, decrypt_compact, value, key2)
def test_ECDH_ES_with_EC_key(self):
algs = ["ECDH-ES", "ECDH-ES+A128KW", "ECDH-ES+A192KW", "ECDH-ES+A256KW"]
for size in [256, 384, 512]:
private_key: ECKey = load_key(f"ec-p{size}-private.pem")
public_key: ECKey = load_key(f"ec-p{size}-public.pem")
self.run_cases(algs, private_key, public_key)
key1 = ECKey.generate_key("P-256")
key2 = ECKey.generate_key("P-256")
key3 = ECKey.generate_key("P-521")
for alg in ["ECDH-ES", "ECDH-ES+A128KW"]:
for enc in ["A128CBC-HS256", "A128GCM"]:
protected = {"alg": alg, "enc": enc}
value = encrypt_compact(protected, "i", key1)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key2,
)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key3,
)
def test_ECDH_ES_with_OKP_key(self):
key1 = OKPKey.generate_key("X25519")
key2 = OKPKey.generate_key("X448")
for alg in ["ECDH-ES", "ECDH-ES+A128KW"]:
for enc in ["A128CBC-HS256", "A128GCM"]:
protected = {"alg": alg, "enc": enc}
value = encrypt_compact(protected, "i", key1)
obj = decrypt_compact(value, key1)
self.assertEqual(obj.protected, protected)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key2,
)
value = encrypt_compact(protected, "i", key2)
obj = decrypt_compact(value, key2)
self.assertEqual(obj.protected, protected)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key1,
)
def test_dir_alg(self):
key = OctKey.import_key("secret")
self.assertRaises(InvalidKeyLengthError, encrypt_compact, {"alg": "dir", "enc": "A128GCM"}, b"j", key)
for enc in JWE_ENC_MODELS:
key = OctKey.generate_key(enc.cek_size)
self.run_case("dir", enc.name, key, key)
def test_AESGCM_alg(self):
for size in [128, 192, 256]:
key = OctKey.generate_key(size)
self.run_cases([f"A{size}GCMKW"], key, key)
key1 = OctKey.generate_key(128)
key2 = OctKey.generate_key(128)
protected = {"alg": "A128GCMKW", "enc": "A128CBC-HS256"}
algorithms = ["A128GCMKW", "A128CBC-HS256"]
value = encrypt_compact(protected, "i", key1, algorithms=algorithms)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key2,
algorithms=algorithms,
)
def test_PBES2HS_alg(self):
algs = {
"PBES2-HS256+A128KW": 128,
"PBES2-HS384+A192KW": 192,
"PBES2-HS512+A256KW": 256,
}
for alg in algs:
key = OctKey.generate_key(algs[alg])
self.run_cases([alg], key, key)
key1 = OctKey.generate_key(128)
key2 = OctKey.generate_key(128)
protected = {"alg": "PBES2-HS256+A128KW", "enc": "A128CBC-HS256"}
algorithms = ["PBES2-HS256+A128KW", "A128CBC-HS256"]
value = encrypt_compact(protected, "i", key1, algorithms=algorithms)
self.assertRaises(
DecodeError,
decrypt_compact,
value,
key2,
algorithms=algorithms,
)
def test_PBES2HS_with_header(self):
key = OctKey.generate_key(128)
protected = {
"alg": "PBES2-HS256+A128KW",
"enc": "A128CBC-HS256",
"p2s": "QoGrcBpns_cLWCQPEVuA-g",
"p2c": 1024,
}
registry = JWERegistry(algorithms=["PBES2-HS256+A128KW", "A128CBC-HS256"])
value1 = encrypt_compact(protected, b"i", key, registry=registry)
obj1 = decrypt_compact(value1, key, registry=registry)
self.assertIn("p2c", obj1.headers())
self.assertEqual(obj1.headers()["p2c"], 1024)
# invalid type
protected["p2c"] = "1024"
self.assertRaises(
InvalidHeaderValueError,
encrypt_compact,
protected,
b"i",
key,
registry=registry,
)
def test_PBES2HS_with_small_p2c(self):
key = OctKey.generate_key(128)
protected = {
"alg": "PBES2-HS256+A128KW",
"enc": "A128CBC-HS256",
"p2s": "QoGrcBpns_cLWCQPEVuA-g",
"p2c": 500,
}
registry = JWERegistry(algorithms=["PBES2-HS256+A128KW", "A128CBC-HS256"])
self.assertWarns(
SecurityWarning,
encrypt_compact,
protected,
b"i",
key,
registry=registry,
)
def test_PBES2HS_with_large_p2c(self):
key = OctKey.import_key({"k": "pyL42ncDFSYnenl-GiZjRw", "kty": "oct"})
protected = {
"alg": "PBES2-HS256+A128KW",
"enc": "A128CBC-HS256",
"p2s": "QoGrcBpns_cLWCQPEVuA-g",
"p2c": 500000,
}
registry = JWERegistry(algorithms=["PBES2-HS256+A128KW", "A128CBC-HS256"])
self.assertRaises(
InvalidHeaderValueError,
encrypt_compact,
protected,
b"i",
key,
registry=registry,
)
encrypted = "eyJhbGciOiJQQkVTMi1IUzI1NitBMTI4S1ciLCJlbmMiOiJBMTI4Q0JDLUhTMjU2IiwicDJzIjoiUW9HcmNCcG5zX2NMV0NRUEVWdUEtZyIsInAyYyI6NTAwMDAwfQ.qdtshVQlPM-fW57DRVUnmwMyvBVzUZCm58zn7j5W7IP9S2-cBVTh_w.mMUagTUTRi7fLQ3VUi6g4w.Hi0-8_MusxEwRtW6dkjXzw.Ktm1FmBA9rPe0Vv8w0kZ2g"
self.assertRaises(
InvalidHeaderValueError,
decrypt_compact,
encrypted,
key,
registry=registry,
)
def test_with_zip_header(self):
private_key: RSAKey = load_key("rsa-openssl-private.pem")
public_key: RSAKey = load_key("rsa-openssl-public.pem")
protected = {"alg": "RSA-OAEP", "enc": "A128CBC-HS256", "zip": "DEF"}
plaintext = b"hello"
result = encrypt_compact(protected, plaintext, public_key)
obj = decrypt_compact(result, private_key)
self.assertEqual(obj.plaintext, plaintext)
def test_decompress_zip_with_gzip_head(self):
key = OctKey.import_key({"k": "pyL42ncDFSYnenl-GiZjRw", "kty": "oct"})
s = (
"eyJhbGciOiJkaXIiLCJlbmMiOiJBMTI4R0NNIiwiemlwIjoiREVGIn0.."
"YbDfdYa6p-wAEFul.YK7j0MsH-Dko6ifsEg.wES6-QAOEbErZqXiS0JHRw"
)
result = decrypt_compact(s, key)
self.assertEqual(result.plaintext, b"hello")
self.assertEqual(result.headers().get("zip"), "DEF")
def test_decompress_zip_exceeds_size(self):
key = OctKey.import_key({"k": "pyL42ncDFSYnenl-GiZjRw", "kty": "oct"})
result = encrypt_compact({"alg": "dir", "enc": "A128GCM", "zip": "DEF"}, b"h" * 300000, key)
self.assertRaises(ExceededSizeError, decrypt_compact, result, key)
def test_header_exceeds_size(self):
header = json_b64encode({f"a{i}": "a" * i for i in range(1000)}).decode("utf-8")
s = header + "..YbDfdYa6p-wAEFul.YK7j0MsH-Dko6ifsEg.wES6-QAOEbErZqXiS0JHRw"
self.assertRaises(ExceededSizeError, decrypt_compact, s, OctKey.import_key("secret"))
def test_encrypted_key_exceeds_size(self):
header = json_b64encode({"alg": "dir", "enc": "A128GCM"}).decode("utf-8")
ek = urlsafe_b64encode(("a" * 1000).encode("utf-8")).decode("utf-8")
s = header + "." + ek + ".YbDfdYa6p-wAEFul.YK7j0MsH-Dko6ifsEg.wES6-QAOEbErZqXiS0JHRw"
key = OctKey.import_key({"k": "pyL42ncDFSYnenl-GiZjRw", "kty": "oct"})
self.assertRaises(ExceededSizeError, decrypt_compact, s, key)
def test_initialization_vector_size(self):
header = json_b64encode({"alg": "dir", "enc": "A128GCM"}).decode("utf-8")
iv = urlsafe_b64encode(("a" * 1000).encode("utf-8")).decode("utf-8")
s = header + ".." + iv + ".YK7j0MsH-Dko6ifsEg.wES6-QAOEbErZqXiS0JHRw"
key = OctKey.import_key({"k": "pyL42ncDFSYnenl-GiZjRw", "kty": "oct"})
self.assertRaises(ExceededSizeError, decrypt_compact, s, key)
def test_ciphertext_exceeds_size(self):
header = json_b64encode({"alg": "dir", "enc": "A128GCM"}).decode("utf-8")
ciphertext = urlsafe_b64encode(("a" * 70000).encode("utf-8")).decode("utf-8")
s = header + "..YbDfdYa6p-wAEFul." + ciphertext + ".wES6-QAOEbErZqXiS0JHRw"
self.assertRaises(ExceededSizeError, decrypt_compact, s, OctKey.import_key("secret"))
def test_auth_tag_exceeds_size(self):
header = json_b64encode({"alg": "dir", "enc": "A128GCM"}).decode("utf-8")
tag = urlsafe_b64encode(("a" * 80).encode("utf-8")).decode("utf-8")
s = header + "..YbDfdYa6p-wAEFul.YK7j0MsH-Dko6ifsEg." + tag
self.assertRaises(ExceededSizeError, decrypt_compact, s, OctKey.import_key("secret"))
def test_invalid_compact_data(self):
private_key: RSAKey = load_key("rsa-openssl-private.pem")
value = b"a.b.c.d.e.f.g"
self.assertRaises(ValueError, decrypt_compact, value, private_key)
value = b"a.b.c.d.e"
self.assertRaises(DecodeError, decrypt_compact, value, private_key)
value = json_b64encode({"enc": "A128CBC-HS256"}) + b".b.c.d.e"
self.assertRaises(MissingAlgorithmError, decrypt_compact, value, private_key)
value = json_b64encode({"alg": "RSA-OAEP"}) + b".b.c.d.e"
self.assertRaises(MissingEncryptionError, decrypt_compact, value, private_key)
def test_with_key_set(self):
keys = KeySet(
[
OctKey.generate_key(),
OctKey.generate_key(),
RSAKey.generate_key(),
]
)
protected = {"alg": "RSA-OAEP", "enc": "A128CBC-HS256"}
value = encrypt_compact(protected, b"foo", keys)
obj = decrypt_compact(value, keys)
self.assertEqual(obj.plaintext, b"foo")
def test_compact_encryption(self):
key: RSAKey = load_key("rsa-openssl-private.pem")
protected = {"alg": "RSA-OAEP", "enc": "A128CBC-HS256"}
obj = CompactEncryption(protected, b"")
self.assertEqual(obj.recipients, [])
obj.attach_recipient(key, {"kid": "foo"})
self.assertEqual(obj.protected["kid"], "foo")
|
