"""
from argparse import ArgumentParser
+from base64 import standard_b64decode
from base64 import standard_b64encode
from datetime import datetime
from datetime import timedelta
from os import urandom
+from sys import stdout
from textwrap import fill
from pyderasn import Any
from pyderasn import UTCTime
from pygost.asn1schemas.oids import id_at_commonName
+from pygost.asn1schemas.oids import id_at_countryName
+from pygost.asn1schemas.oids import id_ce_authorityKeyIdentifier
from pygost.asn1schemas.oids import id_ce_basicConstraints
+from pygost.asn1schemas.oids import id_ce_keyUsage
from pygost.asn1schemas.oids import id_ce_subjectAltName
from pygost.asn1schemas.oids import id_ce_subjectKeyIdentifier
from pygost.asn1schemas.oids import id_tc26_gost3410_2012_256
from pygost.asn1schemas.x509 import AttributeType
from pygost.asn1schemas.x509 import AttributeTypeAndValue
from pygost.asn1schemas.x509 import AttributeValue
+from pygost.asn1schemas.x509 import AuthorityKeyIdentifier
from pygost.asn1schemas.x509 import BasicConstraints
from pygost.asn1schemas.x509 import Certificate
from pygost.asn1schemas.x509 import CertificateSerialNumber
from pygost.asn1schemas.x509 import Extensions
from pygost.asn1schemas.x509 import GeneralName
from pygost.asn1schemas.x509 import GostR34102012PublicKeyParameters
+from pygost.asn1schemas.x509 import KeyIdentifier
+from pygost.asn1schemas.x509 import KeyUsage
from pygost.asn1schemas.x509 import Name
from pygost.asn1schemas.x509 import RDNSequence
from pygost.asn1schemas.x509 import RelativeDistinguishedName
from pygost.gost3410 import sign
from pygost.gost34112012256 import GOST34112012256
from pygost.gost34112012512 import GOST34112012512
+from pygost.utils import bytes2long
parser = ArgumentParser(description="Self-signed X.509 certificate creator")
parser.add_argument(
required=True,
help="Subject's CommonName",
)
+parser.add_argument(
+ "--country",
+ help="Subject's Country",
+)
+parser.add_argument(
+ "--serial",
+ help="Serial number",
+)
parser.add_argument(
"--ai",
required=True,
help="Signing algorithm: {256[ABCD],512[ABC]}",
)
+parser.add_argument(
+ "--issue-with",
+ help="Path to PEM with CA to issue the child",
+)
+parser.add_argument(
+ "--out-key",
+ help="Path to PEM with the resulting key",
+)
+parser.add_argument(
+ "--out-cert",
+ help="Path to PEM with the resulting certificate",
+)
args = parser.parse_args()
-ai = {
+AIs = {
"256A": {
"publicKeyParamSet": id_tc26_gost3410_2012_256_paramSetA,
"key_algorithm": id_tc26_gost3410_2012_256,
"sign_algorithm": id_tc26_signwithdigest_gost3410_2012_512,
"hasher": GOST34112012512,
},
-}[args.ai]
+}
+ai = AIs[args.ai]
+
+ca_prv = None
+ca_cert = None
+ca_subj = None
+ca_ai = None
+if args.issue_with is not None:
+ with open(args.issue_with, "rb") as fd:
+ lines = fd.read().decode("ascii").split("-----")
+ idx = lines.index("BEGIN PRIVATE KEY")
+ if idx == -1:
+ raise ValueError("PEM has no PRIVATE KEY")
+ prv_raw = standard_b64decode(lines[idx + 1])
+ idx = lines.index("BEGIN CERTIFICATE")
+ if idx == -1:
+ raise ValueError("PEM has no CERTIFICATE")
+ cert_raw = standard_b64decode(lines[idx + 1])
+ pki = PrivateKeyInfo().decod(prv_raw)
+ ca_prv = prv_unmarshal(bytes(OctetString().decod(bytes(pki["privateKey"]))))
+ ca_cert = Certificate().decod(cert_raw)
+ tbs = ca_cert["tbsCertificate"]
+ ca_subj = tbs["subject"]
+ curve_oid = GostR34102012PublicKeyParameters().decod(bytes(
+ tbs["subjectPublicKeyInfo"]["algorithm"]["parameters"]
+ ))["publicKeyParamSet"]
+ ca_ai = next(iter([
+ params for params in AIs.values()
+ if params["publicKeyParamSet"] == curve_oid
+ ]))
def pem(obj):
))
prv_raw = urandom(ai["prv_len"])
-print("-----BEGIN PRIVATE KEY-----")
+out = stdout if args.out_key is None else open(args.out_key, "w")
+print("-----BEGIN PRIVATE KEY-----", file=out)
print(pem(PrivateKeyInfo((
("version", Integer(0)),
("privateKeyAlgorithm", PrivateKeyAlgorithmIdentifier((
("parameters", Any(key_params)),
))),
("privateKey", PrivateKey(OctetString(prv_raw).encode())),
-))))
-print("-----END PRIVATE KEY-----")
+))), file=out)
+print("-----END PRIVATE KEY-----", file=out)
prv = prv_unmarshal(prv_raw)
curve = ai["curve"]
pub_raw = pub_marshal(public_key(curve, prv))
-subj = Name(("rdnSequence", RDNSequence([
- RelativeDistinguishedName((
+rdn = [RelativeDistinguishedName((
+ AttributeTypeAndValue((
+ ("type", AttributeType(id_at_commonName)),
+ ("value", AttributeValue(PrintableString(args.cn))),
+ )),
+))]
+if args.country:
+ rdn.append(RelativeDistinguishedName((
AttributeTypeAndValue((
- ("type", AttributeType(id_at_commonName)),
- ("value", AttributeValue(PrintableString(args.cn))),
+ ("type", AttributeType(id_at_countryName)),
+ ("value", AttributeValue(PrintableString(args.country))),
)),
- ))
-])))
+ )))
+subj = Name(("rdnSequence", RDNSequence(rdn)))
not_before = datetime.utcnow()
-not_after = not_before + timedelta(days=365)
+not_after = not_before + timedelta(days=365 * (10 if args.ca else 1))
ai_sign = AlgorithmIdentifier((
- ("algorithm", ai["sign_algorithm"],),
+ ("algorithm", (ai if ca_ai is None else ca_ai)["sign_algorithm"]),
))
exts = [
Extension((
)),
)),
Extension((
+ ("extnID", id_ce_keyUsage),
+ ("critical", Boolean(True)),
+ ("extnValue", OctetString(KeyUsage(
+ ("keyCertSign" if args.ca else "digitalSignature",),
+ ).encode())),
+ )),
+]
+if args.ca:
+ exts.append(Extension((
+ ("extnID", id_ce_basicConstraints),
+ ("critical", Boolean(True)),
+ ("extnValue", OctetString(BasicConstraints((
+ ("cA", Boolean(True)),
+ )).encode())),
+ )))
+else:
+ exts.append(Extension((
("extnID", id_ce_subjectAltName),
("extnValue", OctetString(
SubjectAltName((
GeneralName(("dNSName", IA5String(args.cn))),
)).encode()
)),
- )),
-]
-if args.ca:
+ )))
+if ca_ai is not None:
+ caKeyId = [
+ bytes(SubjectKeyIdentifier().decod(bytes(ext["extnValue"])))
+ for ext in ca_cert["tbsCertificate"]["extensions"]
+ if ext["extnID"] == id_ce_subjectKeyIdentifier
+ ][0]
exts.append(Extension((
- ("extnID", id_ce_basicConstraints),
- ("extnValue", OctetString(BasicConstraints((("cA", Boolean(True)),)).encode())),
+ ("extnID", id_ce_authorityKeyIdentifier),
+ ("extnValue", OctetString(AuthorityKeyIdentifier((
+ ("keyIdentifier", KeyIdentifier(caKeyId)),
+ )).encode())),
)))
+
+serial = (
+ bytes2long(GOST34112012256(urandom(16)).digest()[:20])
+ if args.serial is None else int(args.serial)
+)
tbs = TBSCertificate((
("version", Version("v3")),
- ("serialNumber", CertificateSerialNumber(12345)),
+ ("serialNumber", CertificateSerialNumber(serial)),
("signature", ai_sign),
- ("issuer", subj),
+ ("issuer", subj if ca_ai is None else ca_subj),
("validity", Validity((
("notBefore", Time(("utcTime", UTCTime(not_before)))),
("notAfter", Time(("utcTime", UTCTime(not_after)))),
cert = Certificate((
("tbsCertificate", tbs),
("signatureAlgorithm", ai_sign),
- ("signatureValue", BitString(sign(
- curve,
- prv,
- ai["hasher"](tbs.encode()).digest()[::-1],
- ))),
+ ("signatureValue", BitString(
+ sign(curve, prv, ai["hasher"](tbs.encode()).digest()[::-1])
+ if ca_ai is None else
+ sign(ca_ai["curve"], ca_prv, ca_ai["hasher"](tbs.encode()).digest()[::-1])
+ )),
))
-print("-----BEGIN CERTIFICATE-----")
-print(pem(cert))
-print("-----END CERTIFICATE-----")
+out = stdout if args.out_cert is None else open(args.out_cert, "w")
+print("-----BEGIN CERTIFICATE-----", file=out)
+print(pem(cert), file=out)
+print("-----END CERTIFICATE-----", file=out)