server

crt_and_key_gen.py

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+import datetime
+
+from cryptography import x509
+from cryptography.hazmat.backends import default_backend
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import rsa
+from cryptography.x509.oid import NameOID
+
+one_day = datetime.timedelta(days=1)
+ten_day = datetime.timedelta(days=3650)
+today = datetime.datetime.today()
+yesterday = today - one_day
+tomorrow = today + ten_day
+
+private_key = rsa.generate_private_key(
+    public_exponent=65537,
+    key_size=4096,
+    backend=default_backend()
+)
+public_key = private_key.public_key()
+builder = x509.CertificateBuilder()
+
+builder = builder.subject_name(x509.Name([
+    x509.NameAttribute(NameOID.COMMON_NAME, 'Novice'),
+]))
+builder = builder.issuer_name(x509.Name([
+    x509.NameAttribute(NameOID.COMMON_NAME, 'JetProfile CA'),
+]))
+builder = builder.not_valid_before(yesterday)
+builder = builder.not_valid_after(tomorrow)
+builder = builder.serial_number(x509.random_serial_number())
+builder = builder.public_key(public_key)
+
+certificate = builder.sign(
+    private_key=private_key, algorithm=hashes.SHA256(),
+    backend=default_backend()
+)
+
+private_bytes = private_key.private_bytes(
+    encoding=serialization.Encoding.PEM,
+    format=serialization.PrivateFormat.TraditionalOpenSSL,
+    encryption_algorithm=serialization.NoEncryption())
+public_bytes = certificate.public_bytes(
+    encoding=serialization.Encoding.PEM)
+with open("ca.key", "wb") as fout:
+    fout.write(private_bytes)
+with open("ca.crt", "wb") as fout:
+    fout.write(public_bytes)