1 """Create example self-signed X.509 certificate
4 from base64 import standard_b64encode
5 from datetime import datetime
6 from datetime import timedelta
9 from sys import exit as sys_exit
10 from textwrap import fill
12 from pyderasn import Any
13 from pyderasn import BitString
14 from pyderasn import Integer
15 from pyderasn import OctetString
16 from pyderasn import PrintableString
17 from pyderasn import UTCTime
19 from pygost.asn1schemas.oids import id_at_commonName
20 from pygost.asn1schemas.oids import id_ce_subjectKeyIdentifier
21 from pygost.asn1schemas.oids import id_tc26_gost3410_2012_512
22 from pygost.asn1schemas.oids import id_tc26_gost3410_2012_512_paramSetA
23 from pygost.asn1schemas.oids import id_tc26_signwithdigest_gost3410_2012_512
24 from pygost.asn1schemas.prvkey import PrivateKey
25 from pygost.asn1schemas.prvkey import PrivateKeyAlgorithmIdentifier
26 from pygost.asn1schemas.prvkey import PrivateKeyInfo
27 from pygost.asn1schemas.x509 import AlgorithmIdentifier
28 from pygost.asn1schemas.x509 import AttributeType
29 from pygost.asn1schemas.x509 import AttributeTypeAndValue
30 from pygost.asn1schemas.x509 import AttributeValue
31 from pygost.asn1schemas.x509 import Certificate
32 from pygost.asn1schemas.x509 import CertificateSerialNumber
33 from pygost.asn1schemas.x509 import Extension
34 from pygost.asn1schemas.x509 import Extensions
35 from pygost.asn1schemas.x509 import GostR34102012PublicKeyParameters
36 from pygost.asn1schemas.x509 import Name
37 from pygost.asn1schemas.x509 import RDNSequence
38 from pygost.asn1schemas.x509 import RelativeDistinguishedName
39 from pygost.asn1schemas.x509 import SubjectKeyIdentifier
40 from pygost.asn1schemas.x509 import SubjectPublicKeyInfo
41 from pygost.asn1schemas.x509 import TBSCertificate
42 from pygost.asn1schemas.x509 import Time
43 from pygost.asn1schemas.x509 import Validity
44 from pygost.asn1schemas.x509 import Version
45 from pygost.gost3410 import CURVES
46 from pygost.gost3410 import prv_unmarshal
47 from pygost.gost3410 import pub_marshal
48 from pygost.gost3410 import public_key
49 from pygost.gost3410 import sign
50 from pygost.gost34112012512 import GOST34112012512
53 sys_exit("Usage: cert-selfsigned-example.py COMMON-NAME")
57 return fill(standard_b64encode(obj.encode()).decode("ascii"), 64)
60 key_params = GostR34102012PublicKeyParameters((
61 ("publicKeyParamSet", id_tc26_gost3410_2012_512_paramSetA),
65 print("-----BEGIN PRIVATE KEY-----")
66 print(pem(PrivateKeyInfo((
67 ("version", Integer(0)),
68 ("privateKeyAlgorithm", PrivateKeyAlgorithmIdentifier((
69 ("algorithm", id_tc26_gost3410_2012_512),
70 ("parameters", Any(key_params)),
72 ("privateKey", PrivateKey(prv_raw)),
74 print("-----END PRIVATE KEY-----")
76 prv = prv_unmarshal(prv_raw)
77 curve = CURVES["id-tc26-gost-3410-12-512-paramSetA"]
78 pub_raw = pub_marshal(public_key(curve, prv))
79 subj = Name(("rdnSequence", RDNSequence([
80 RelativeDistinguishedName((
81 AttributeTypeAndValue((
82 ("type", AttributeType(id_at_commonName)),
83 ("value", AttributeValue(PrintableString(argv[1]))),
87 not_before = datetime.utcnow()
88 not_after = not_before + timedelta(days=365)
89 ai_sign = AlgorithmIdentifier((
90 ("algorithm", id_tc26_signwithdigest_gost3410_2012_512),
92 tbs = TBSCertificate((
93 ("version", Version("v3")),
94 ("serialNumber", CertificateSerialNumber(12345)),
95 ("signature", ai_sign),
97 ("validity", Validity((
98 ("notBefore", Time(("utcTime", UTCTime(not_before)))),
99 ("notAfter", Time(("utcTime", UTCTime(not_after)))),
102 ("subjectPublicKeyInfo", SubjectPublicKeyInfo((
103 ("algorithm", AlgorithmIdentifier((
104 ("algorithm", id_tc26_gost3410_2012_512),
105 ("parameters", Any(key_params)),
107 ("subjectPublicKey", BitString(OctetString(pub_raw).encode())),
109 ("extensions", Extensions((
111 ("extnID", id_ce_subjectKeyIdentifier),
112 ("extnValue", OctetString(
113 SubjectKeyIdentifier(GOST34112012512(pub_raw).digest()[:20]).encode()
119 ("tbsCertificate", tbs),
120 ("signatureAlgorithm", ai_sign),
121 ("signatureValue", BitString(sign(
124 GOST34112012512(tbs.encode()).digest()[::-1],
127 print("-----BEGIN CERTIFICATE-----")
129 print("-----END CERTIFICATE-----")