Created
June 3, 2021 13:55
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ca.py
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| import boto3 | |
| from cryptography.hazmat.primitives.asymmetric import rsa | |
| from cryptography.hazmat.primitives import hashes, serialization | |
| from cryptography.hazmat import backends | |
| from cryptography import x509 | |
| from cryptography.x509.oid import NameOID | |
| import datetime | |
| import json | |
| import os | |
| def lambda_handler(event, context): | |
| now = datetime.datetime.now() | |
| expire_date = now + datetime.timedelta(days=3650) | |
| s3 = boto3.resource('s3') | |
| http = urllib3.PoolManager() | |
| files = ['nifi/certificates/nifi-cert.pem','nifi/certificates/nifi-key.key','nifi/certificates/admin/admin_cert.pem','nifi/certificates/admin/private_key.pem', ] | |
| s3_object = list(s3.Bucket(os.environ['BUCKET']).objects.filter(Prefix='nifi/certificates/nifi-key.key')) | |
| if len(s3_object) > 0 | |
| print('CA found, skipping.') | |
| else: | |
| print('CA not found, generating.') | |
| # Valid dates | |
| now = datetime.datetime.now() | |
| expire_date = now + datetime.timedelta(days=3650) | |
| print(expire_date) | |
| # CA | |
| ca_private_key = rsa.generate_private_key( | |
| public_exponent=65537, | |
| key_size=2048, | |
| backend=backends.default_backend() | |
| ) | |
| ca_public_key = ca_private_key.public_key() | |
| builder = x509.CertificateBuilder() | |
| builder = builder.subject_name(x509.Name([ | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"NIFICA"), | |
| ])) | |
| builder = builder.issuer_name(x509.Name([ | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"NIFICA"), | |
| ])) | |
| builder = builder.not_valid_before(now) | |
| builder = builder.not_valid_after(expire_date) | |
| builder = builder.serial_number(x509.random_serial_number()) | |
| builder = builder.public_key(ca_public_key) | |
| builder = builder.add_extension( | |
| x509.BasicConstraints(ca=True, path_length=None), | |
| critical=True) | |
| ca_certificate = builder.sign( | |
| private_key=ca_private_key, algorithm=hashes.SHA256(), backend=backends.default_backend() | |
| ) | |
| ca_private_bytes = ca_private_key.private_bytes( | |
| encoding=serialization.Encoding.PEM, | |
| format=serialization.PrivateFormat.TraditionalOpenSSL, | |
| encryption_algorithm=serialization.NoEncryption()) | |
| ca_public_bytes = ca_certificate.public_bytes( | |
| encoding=serialization.Encoding.PEM) | |
| # ADMIN | |
| admin_private_key = rsa.generate_private_key( | |
| public_exponent=65537, | |
| key_size=2048, | |
| backend=backends.default_backend() | |
| ) | |
| admin_public_key = admin_private_key.public_key() | |
| builder = x509.CertificateBuilder() | |
| builder = builder.subject_name(x509.Name([ | |
| x509.NameAttribute(NameOID.ORGANIZATIONAL_UNIT_NAME, u"NIFI"), | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"admin") | |
| ])) | |
| builder = builder.issuer_name(x509.Name([ | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"NIFICA"), | |
| ])) | |
| builder = builder.not_valid_before(now) | |
| builder = builder.not_valid_after(expire_date) | |
| builder = builder.serial_number(x509.random_serial_number()) | |
| builder = builder.public_key(admin_public_key) | |
| admin_certificate = builder.sign( | |
| private_key=ca_private_key, algorithm=hashes.SHA256(), backend=backends.default_backend() | |
| ) | |
| private_bytes = admin_private_key.private_bytes( | |
| encoding=serialization.Encoding.PEM, | |
| format=serialization.PrivateFormat.TraditionalOpenSSL, | |
| encryption_algorithm=serialization.NoEncryption()) | |
| public_bytes = admin_certificate.public_bytes( | |
| encoding=serialization.Encoding.PEM) | |
| # UPLOAD | |
| for prefixes in files: | |
| s3.meta.client.upload_fileobj( | |
| http.request('GET', urls[key], preload_content=False), | |
| os.environ['BUCKET'], | |
| key, | |
| ExtraArgs={'ServerSideEncryption':'aws:kms','SSEKMSKeyId':os.environ['KEY']}) | |
| print(key + ' put to s3.') | |
| return { | |
| 'statusCode': 200, | |
| 'body': json.dumps('Complete') | |
| } |
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