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add public key encoding conversion functions
1 parent 8e78302 commit 6eb982f

3 files changed

Lines changed: 173 additions & 105 deletions

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‎jose/backends/_asn1.py‎

Lines changed: 35 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -9,7 +9,7 @@
99
RSA_ENCRYPTION_ASN1_OID = "1.2.840.113549.1.1.1"
1010

1111

12-
class PKCS8RsaPrivateKeyAlgorithm(univ.Sequence):
12+
class RsaAlgorithmIdentifier(univ.Sequence):
1313
"""ASN1 structure for recording RSA PrivateKeyAlgorithm identifiers."""
1414
componentType = namedtype.NamedTypes(
1515
namedtype.NamedType("rsaEncryption", univ.ObjectIdentifier()),
@@ -21,11 +21,19 @@ class PKCS8PrivateKey(univ.Sequence):
2121
"""ASN1 structure for recording PKCS8 private keys."""
2222
componentType = namedtype.NamedTypes(
2323
namedtype.NamedType("version", univ.Integer()),
24-
namedtype.NamedType("privateKeyAlgorithm", PKCS8RsaPrivateKeyAlgorithm()),
24+
namedtype.NamedType("privateKeyAlgorithm", RsaAlgorithmIdentifier()),
2525
namedtype.NamedType("privateKey", univ.OctetString())
2626
)
2727

2828

29+
class PublicKeyInfo(univ.Sequence):
30+
"""ASN1 structure for recording PKCS8 public keys."""
31+
componentType = namedtype.NamedTypes(
32+
namedtype.NamedType("algorithm", RsaAlgorithmIdentifier()),
33+
namedtype.NamedType("publicKey", univ.BitString())
34+
)
35+
36+
2937
def rsa_private_key_pkcs8_to_pkcs1(pkcs8_key):
3038
"""Convert a PKCS8-encoded RSA private key to PKCS1."""
3139
decoded_values = decoder.decode(pkcs8_key, asn1Spec=PKCS8PrivateKey())
@@ -40,7 +48,7 @@ def rsa_private_key_pkcs8_to_pkcs1(pkcs8_key):
4048

4149
def rsa_private_key_pkcs1_to_pkcs8(pkcs1_key):
4250
"""Convert a PKCS1-encoded RSA private key to PKCS8."""
43-
algorithm = PKCS8RsaPrivateKeyAlgorithm()
51+
algorithm = RsaAlgorithmIdentifier()
4452
algorithm["rsaEncryption"] = RSA_ENCRYPTION_ASN1_OID
4553

4654
pkcs8_key = PKCS8PrivateKey()
@@ -49,3 +57,27 @@ def rsa_private_key_pkcs1_to_pkcs8(pkcs1_key):
4957
pkcs8_key["privateKey"] = pkcs1_key
5058

5159
return encoder.encode(pkcs8_key)
60+
61+
62+
def rsa_public_key_pkcs1_to_pkcs8(pkcs1_key):
63+
"""Convert a PKCS1-encoded RSA private key to PKCS8."""
64+
algorithm = RsaAlgorithmIdentifier()
65+
algorithm["rsaEncryption"] = RSA_ENCRYPTION_ASN1_OID
66+
67+
pkcs8_key = PublicKeyInfo()
68+
pkcs8_key["algorithm"] = algorithm
69+
pkcs8_key["publicKey"] = univ.BitString.fromOctetString(pkcs1_key)
70+
71+
return encoder.encode(pkcs8_key)
72+
73+
74+
def rsa_public_key_pkcs8_to_pkcs1(pkcs8_key):
75+
"""Convert a PKCS8-encoded RSA private key to PKCS1."""
76+
decoded_values = decoder.decode(pkcs8_key, asn1Spec=PublicKeyInfo())
77+
78+
try:
79+
decoded_key = decoded_values[0]
80+
except IndexError:
81+
raise ValueError("Invalid public key encoding.")
82+
83+
return decoded_key["publicKey"].asOctets()

‎tests/algorithms/test_RSA.py‎

Lines changed: 0 additions & 100 deletions
Original file line numberDiff line numberDiff line change
@@ -168,106 +168,6 @@
168168
-----END PRIVATE KEY-----
169169
"""
170170

171-
PKCS8_PRIVATE_KEY = b"""MIIJRQIBADANBgkqhkiG9w0BAQEFAASCCS8wggkrAg
172-
EAAoICAQC1Ip9J4jR+6REhffwAeUoHVg+lfw9Rg3Yl298z5eM2Yt9TUzvg3RWZ3Mh
173-
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174-
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177-
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213-
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214-
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215-
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216-
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217-
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219-
aic19XMgZGZ1TEfCLW6WSykCf9+Zjt/SFmmyQPBwfJmZspm6T41T8UnwgBya+T3Lu
220-
bbmdJJzw=="""
221-
PKCS1_PRIVATE_KEY = b"""MIIJKwIBAAKCAgEAtSKfSeI0fukRIX38AHlKB1YPp
222-
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223-
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224-
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225-
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226-
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227-
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228-
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229-
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269-
pskDwcHyZmbKZuk+NU/FJ8IAcmvk9y7m25nSSc8="""
270-
271171

272172
def _legacy_invalid_private_key_pkcs8_der():
273173
legacy_key = LEGACY_INVALID_PRIVATE_KEY_PKCS8_PEM.strip()

‎tests/test_asn1.py‎

Lines changed: 138 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -8,14 +8,136 @@
88
except ImportError:
99
_asn1 = None
1010

11-
from .algorithms.test_RSA import PKCS1_PRIVATE_KEY, PKCS8_PRIVATE_KEY
12-
1311
pytestmark = [
1412
pytest.mark.pycrypto,
1513
pytest.mark.pycryptodome,
1614
pytest.mark.skipif(_asn1 is None, reason="ASN1 backend not available")
1715
]
1816

17+
PKCS1_PRIVATE_KEY = b"""MIIJKwIBAAKCAgEAtSKfSeI0fukRIX38AHlKB1YPp
18+
X8PUYN2JdvfM+XjNmLfU1M74N0VmdzIX95sneQGO9kC2xMIE+AIlt52Yf/KgBZggA
19+
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20+
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21+
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23+
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40+
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41+
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m/Fg+8O9S8m64mQHwwv5BSQOecAnzkdJG2q9T/Z+Sqg1w2uAbtQ9QEkFFvA0ClhBf
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ZMwrxbF+G0G60Xi3mtaN6pnvYZAogTymWI4RJH5OO9CCnVYUKnkD+GRzDqqt97UP/
57+
Joq5MX08bLiwsBvhPG/zqVQzikdQfFjOYNJV+wY92LWpELLbLso/Q0/WDyExjA8Z4
58+
lH36vTCddTn/91Y2Ytu/FGmCzjICaMrzz+0cLlesgvjZsSoMY4dskQiEQN7G9I/Z8
59+
pAiVEKlBf52N4fYUPfs/oShMty/O5KPNG7L0nrUKlnfr9JrStC2l/9FK8P7pgEbiD
60+
6obY11FlhMMF8udECggEBAIKhvOFtipD1jqDOpjOoR9sK/lRR5bVVWQfamMDN1Awm
61+
jJbVHS8hhtYUM/4sh2p12P6RgoO8fODf1vEcWFh3xxNZE1pPCPaICD9i5U+NRvPz2
62+
vC900HcraLRrUFaRzwhqOOknYJSBrGzW+Cx3YSeaOCgnKyI8B5gw4C0G0iL1dSsz2
63+
bR1O4GNOVfT3R6joZEXATFo/Kc2L0YAvApBNUYvY0kbjJ/JfTO5060SsWftf4iw3j
64+
rhSn9RwTTYdq/kErGFWvDGJn2MiuhMe2onNfVzIGRmdUxHwi1ulkspAn/fmY7f0hZ
65+
pskDwcHyZmbKZuk+NU/FJ8IAcmvk9y7m25nSSc8="""
66+
PKCS8_PRIVATE_KEY = b"""MIIJRQIBADANBgkqhkiG9w0BAQEFAASCCS8wggkrAg
67+
EAAoICAQC1Ip9J4jR+6REhffwAeUoHVg+lfw9Rg3Yl298z5eM2Yt9TUzvg3RWZ3Mh
68+
f3myd5AY72QLbEwgT4AiW3nZh/8qAFmCACVL1jRXHwOxIvYe86OC4B1eKve9gu8DL
69+
IeKf+ZSKwk6pxwUoKEcqOeTS5fL/fz7WvXv9xhOnvpusqlTUjiQzbQz/91u8sFaN/
70+
PLD16G5+vvhpXCv7TEl+wFWvahpAXDD9ccbPr1DvIcroNvFg7jDirawh9wLilPxdM
71+
8ejglnYzvfcRrxrsfG1lLnrf+aGFFktTlrKdCnBpW/ZT74IvoS8a3xOU1k6R5G/zD
72+
P5G3wHvSPOhGlUrfqtH6kcqVeEwZPrX2/zYud5N2yoDblaLYt39zSeK66XbgDr5pq
73+
Pa71JZvED0uZW0We281tFodcTVIuks+giny6mkYXTY3Pa/eV3yAKdNNZ+r8FDzRDL
74+
x7RyhFEAEQJmuMgzMcSDoyWhEPLidrSlFC/rVWiCpEoNTavf9V7MU9ANvdyJixmNY
75+
Gvcek06RSNOu8uYXI4T1DlH+pAaZzoFi1+TmufuIh9eWQkBkdeEHL4SUG6IEz5hKQ
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77+
k7OJGaQfjEsts+RpJPYqzcgcfu1WW0zo2xGTeM11UwIDAQABAoICAQCvH7QleKAMe
78+
0VmvilgQ+PAyAIEnZ2vz4vw+m0H/iD4ugr0wqpHszhpM74+ggs9c/Ja9mr+Z54NqT
79+
Jkutx1zxp3UCsoXttoMGl4YRuRED0l9XkeM2r95riDK8MwIai7xk9JAKeRGavwsVB
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skOCczllrkBivAS/ZoSHrsitMerndbzesyKgi6YI2Ib7tNDt6AQaJixDvjkYusQIt
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mEopFOC39P6TVxKTUsslrCZ7leAlTD7cP0Z10kR6m9igv7Bn+Cc7YAPI+c91DuhzY
82+
09wUxemYhB/b37+DsV+Vq19CGQi/54LpsHnUOF0yLXPKnaE6HMqDqOfviLFVf4e2z
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b9wyIA+7Q1paZT2fyDseZdZzj65I79+ywaMjcMtgp3nGeGurhrdk7mgkt4w71TvX5
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iRy2Dbc9MfA0Aauw9h2MZwGckR21tdrfVqAjk8AbquAZRjeJKhaocuAFPGtfThNZW
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0lRs22Gzl2orJRKUwUwgH+8548UcusDqoN8CexAeBRv1YeFStiwfbRcqmpHY6OZZT
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89+
NcOgUzqsnEX7RQ/vS6i5gmrZ0j4MJIDpz8SyftYA6KtjXvtp0pwFXxuLAC2YoecWc
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Kz+TABmryUy9A+008n++rafjSQ7jyHx/Ft4ZybICoU9nhgpLGs8Dhx1sci4VK31bJ
91+
pRxUWbN1MUdWVE/vQRd2Zce3zhvJY0HgId6rzOas3E80CLrmcSRSSzuIFAy26/JXb
92+
5peMM5MEwJ3roiEiHaJmrU7uRdTCCHU4f2EJruiuIfIB2CQp0oJahyZs88Q04ROCO
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toD3BEhfA5hMNvVfmEy+LWYIejzGMyO7izMPTfElWLtauwKCAQEA1MRuUKTETKEmp
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oxkXdTd1/Ziv9m0eqytOviXAH8w4qTOa5KtE7GF4SQoizFuJX4DFO+09HUVCuWpuF
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MlHDL6nDgo8ns/h+rZH9gGq9dI0EJqZO3qXZd1eqcCTcD75w4RnaVT25t+B143YiH
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yuB2fUtZ45KMJZ8TGaShTrX9d7rEAx5cpBKUcpKdf2+jG4TbEg0d5TpkArLWQaasm
97+
0SJacjxvwLizx9PIO1cnUtqzKzSIc7ZPPaNSF/ggnBvzsuTsjN7Yysj6g/NUNeWaR
98+
uOQHi1jKiJFOPyuTynAFb8dW/TTamM4tNriTPWRDeWxn/cCzjN82LuZYSFp2YSwAh
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9iSQKCAQEA07f2v9iqPmRTKuZledXHIzYAernwQngjiFuFn+9FZtVPLhlF+ld6jjO
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A09Nde8LPJP8fJLne9RyMkXs9892ldfYfub8WD7w71LybriZAfDC/kFJA55wCfOR0
101+
kbar1P9n5KqDXDa4Bu1D1ASQUW8DQKWEF+lJ5MYrXAgKrdBUs6HlIZ/R9iHFHzCXb
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zi/iy9MVFpOkwBXc9yrYlI3jGAd0fVLaGQ5O3pFKduSUaD88UxbEDckwpXCI/LhqJ
103+
nwOE21BvVy0Wk9wmb0JE16MAjTogDIP+FVlnb6gunmyfKkcWNjlIOB2govsAw7K8c
104+
R0SSYA7fai3+hB584tO0Y7NRFVQKCAQEAtLHmJiLoe1PZKVTN4Epp5YFgOCLB/fUs
105+
YYrBYzCh6bmhfQZiavk3BA/bRutB6iFsqJkzCvFsX4bQbrReLea1o3qme9hkCiBPK
106+
ZYjhEkfk470IKdVhQqeQP4ZHMOqq33tQ/8mirkxfTxsuLCwG+E8b/OpVDOKR1B8WM
107+
5g0lX7Bj3YtakQstsuyj9DT9YPITGMDxniUffq9MJ11Of/3VjZi278UaYLOMgJoyv
108+
PP7RwuV6yC+NmxKgxjh2yRCIRA3sb0j9nykCJUQqUF/nY3h9hQ9+z+hKEy3L87ko8
109+
0bsvSetQqWd+v0mtK0LaX/0Urw/umARuIPqhtjXUWWEwwXy50QKCAQEAgqG84W2Kk
110+
PWOoM6mM6hH2wr+VFHltVVZB9qYwM3UDCaMltUdLyGG1hQz/iyHanXY/pGCg7x84N
111+
/W8RxYWHfHE1kTWk8I9ogIP2LlT41G8/Pa8L3TQdytotGtQVpHPCGo46SdglIGsbN
112+
b4LHdhJ5o4KCcrIjwHmDDgLQbSIvV1KzPZtHU7gY05V9PdHqOhkRcBMWj8pzYvRgC
113+
8CkE1Ri9jSRuMn8l9M7nTrRKxZ+1/iLDeOuFKf1HBNNh2r+QSsYVa8MYmfYyK6Ex7
114+
aic19XMgZGZ1TEfCLW6WSykCf9+Zjt/SFmmyQPBwfJmZspm6T41T8UnwgBya+T3Lu
115+
bbmdJJzw=="""
116+
PKCS1_PUBLIC_KEY = b"""MIICCgKCAgEAtSKfSeI0fukRIX38AHlKB1YPpX8PUY
117+
N2JdvfM+XjNmLfU1M74N0VmdzIX95sneQGO9kC2xMIE+AIlt52Yf/KgBZggAlS9Y0
118+
Vx8DsSL2HvOjguAdXir3vYLvAyyHin/mUisJOqccFKChHKjnk0uXy/38+1r17/cYT
119+
p76brKpU1I4kM20M//dbvLBWjfzyw9ehufr74aVwr+0xJfsBVr2oaQFww/XHGz69Q
120+
7yHK6DbxYO4w4q2sIfcC4pT8XTPHo4JZ2M733Ea8a7HxtZS563/mhhRZLU5aynQpw
121+
aVv2U++CL6EvGt8TlNZOkeRv8wz+Rt8B70jzoRpVK36rR+pHKlXhMGT619v82LneT
122+
dsqA25Wi2Ld/c0niuul24A6+aaj2u9SWbxA9LmVtFntvNbRaHXE1SLpLPoIp8uppG
123+
F02Nz2v3ld8gCnTTWfq/BQ80Qy8e0coRRABECZrjIMzHEg6MloRDy4na0pRQv61Vo
124+
gqRKDU2r3/VezFPQDb3ciYsZjWBr3HpNOkUjTrvLmFyOE9Q5R/qQGmc6BYtfk5rn7
125+
iIfXlkJAZHXhBy+ElBuiBM+YSkFM7dH92sSIoZ05V4MP09Xcppx7kdwsJy72Sust9
126+
Hnd9B7V35YnVF6W791lVHnenhCJOziRmkH4xLLbPkaST2Ks3IHH7tVltM6NsRk3jN
127+
dVMCAwEAAQ=="""
128+
PKCS8_PUBLIC_KEY = b"""MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAg
129+
EAtSKfSeI0fukRIX38AHlKB1YPpX8PUYN2JdvfM+XjNmLfU1M74N0VmdzIX95sneQ
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GO9kC2xMIE+AIlt52Yf/KgBZggAlS9Y0Vx8DsSL2HvOjguAdXir3vYLvAyyHin/mU
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isJOqccFKChHKjnk0uXy/38+1r17/cYTp76brKpU1I4kM20M//dbvLBWjfzyw9ehu
132+
fr74aVwr+0xJfsBVr2oaQFww/XHGz69Q7yHK6DbxYO4w4q2sIfcC4pT8XTPHo4JZ2
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M733Ea8a7HxtZS563/mhhRZLU5aynQpwaVv2U++CL6EvGt8TlNZOkeRv8wz+Rt8B7
134+
0jzoRpVK36rR+pHKlXhMGT619v82LneTdsqA25Wi2Ld/c0niuul24A6+aaj2u9SWb
135+
xA9LmVtFntvNbRaHXE1SLpLPoIp8uppGF02Nz2v3ld8gCnTTWfq/BQ80Qy8e0coRR
136+
ABECZrjIMzHEg6MloRDy4na0pRQv61VogqRKDU2r3/VezFPQDb3ciYsZjWBr3HpNO
137+
kUjTrvLmFyOE9Q5R/qQGmc6BYtfk5rn7iIfXlkJAZHXhBy+ElBuiBM+YSkFM7dH92
138+
sSIoZ05V4MP09Xcppx7kdwsJy72Sust9Hnd9B7V35YnVF6W791lVHnenhCJOziRmk
139+
H4xLLbPkaST2Ks3IHH7tVltM6NsRk3jNdVMCAwEAAQ=="""
140+
19141

20142
def test_rsa_private_key_pkcs1_to_pkcs8():
21143
pkcs1 = base64.b64decode(PKCS1_PRIVATE_KEY)
@@ -29,3 +151,17 @@ def test_rsa_private_key_pkcs8_to_pkcs1():
29151
pkcs8 = base64.b64decode(PKCS8_PRIVATE_KEY)
30152

31153
assert _asn1.rsa_private_key_pkcs8_to_pkcs1(pkcs8) == pkcs1
154+
155+
156+
def test_rsa_public_key_pkcs1_to_pkcs8():
157+
pkcs1 = base64.b64decode(PKCS1_PUBLIC_KEY)
158+
pkcs8 = base64.b64decode(PKCS8_PUBLIC_KEY)
159+
160+
assert _asn1.rsa_public_key_pkcs1_to_pkcs8(pkcs1) == pkcs8
161+
162+
163+
def test_rsa_public_key_pkcs8_to_pkcs1():
164+
pkcs1 = base64.b64decode(PKCS1_PUBLIC_KEY)
165+
pkcs8 = base64.b64decode(PKCS8_PUBLIC_KEY)
166+
167+
assert _asn1.rsa_public_key_pkcs8_to_pkcs1(pkcs8) == pkcs1

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