How to generate a Cryptographic key, in Python language.

How to generate a Cryptographic key, in Python language. 

from cryptography.hazmat.backends import default_backend

from cryptography.hazmat.primitives import serialization

from cryptography import x509

from cryptography.x509.oid import NameOID

from cryptography.hazmat.primitives import hashes

from cryptography.hazmat.primitives.serialization import load_pem_

private_key

encryptedpass = b"mypass"

key = load_pem_private_key(open('rsakey.pem', 'rb').read(),encryptedpass,

default_backend())

# Generate CSR

csr = x509.CertificateSigningRequestBuilder().subject_name(x509.Name([

x509.NameAttribute(NameOID.COUNTRY_NAME, u"US"),

x509.NameAttribute(NameOID.STATE_OR_PROVINCE_NAME, u"CA"),

x509.NameAttribute(NameOID.LOCALITY_NAME, u"San Francisco"),

x509.NameAttribute(NameOID.ORGANIZATION_NAME, u"Python Cryptography"),

x509.NameAttribute(NameOID.COMMON_NAME, u"8gwifi.org"),

])).add_extension(

x509.SubjectAlternativeName([

x509.DNSName(u"mysite.com"),]),

critical=False,

# Sign the CSR with our private key.

).sign(key, hashes.SHA256(), default_backend())

with open("csr.pem", "wb") as f:

 f.write(csr.public_bytes(serialization.Encoding.PEM))

 

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