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June 5, 2021 15:39
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nifi-lambda-certs.py
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| import boto3 | |
| from cryptography.hazmat.primitives.asymmetric import rsa | |
| from cryptography.hazmat.primitives.serialization import pkcs12 | |
| 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 io | |
| import json | |
| import os | |
| def lambda_handler(event, context): | |
| now = datetime.datetime.now() | |
| expire_date = now + datetime.timedelta(days=3650) | |
| # PARAMETER | |
| ssm = boto3.client('ssm', region_name=os.environ['REGION']) | |
| nifi_secret = ssm.get_parameter( | |
| Name=os.environ['PREFIX']+'-nifi-secret-'+os.environ['SUFFIX'], | |
| WithDecryption=True | |
| ) | |
| s3 = boto3.resource('s3') | |
| s3_object = list(s3.Bucket(os.environ['BUCKET']).objects.filter(Prefix='nifi/certificates/')) | |
| if len(s3_object) == 5: | |
| print('Certificates found, skipping.') | |
| else: | |
| print('Certificates not found, generating.') | |
| # Valid dates | |
| now = datetime.datetime.now() | |
| expire_date = now + datetime.timedelta(days=3650) | |
| # 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.BestAvailableEncryption(str.encode(nifi_secret['Parameter']['Value']))) | |
| 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() | |
| builder2 = x509.CertificateBuilder() | |
| builder2 = builder2.subject_name(x509.Name([ | |
| x509.NameAttribute(NameOID.ORGANIZATIONAL_UNIT_NAME, u"NIFI"), | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"admin") | |
| ])) | |
| builder2 = builder2.issuer_name(x509.Name([ | |
| x509.NameAttribute(NameOID.COMMON_NAME, u"NIFICA"), | |
| ])) | |
| builder2 = builder2.not_valid_before(now) | |
| builder2 = builder2.not_valid_after(expire_date) | |
| builder2 = builder2.serial_number(x509.random_serial_number()) | |
| builder2 = builder2.public_key(admin_public_key) | |
| builder2 = builder2.add_extension( | |
| x509.KeyUsage(digital_signature=True, content_commitment=False, key_encipherment=True, data_encipherment=True, key_agreement=True, key_cert_sign=True, crl_sign=False, encipher_only=False, decipher_only=False), | |
| critical=True) | |
| builder2 = builder2.add_extension( | |
| x509.ExtendedKeyUsage([x509.oid.ExtendedKeyUsageOID.CLIENT_AUTH]), | |
| critical=True) | |
| admin_certificate = builder2.sign( | |
| private_key=ca_private_key, algorithm=hashes.SHA256(), backend=backends.default_backend() | |
| ) | |
| admin_private_bytes = admin_private_key.private_bytes( | |
| encoding=serialization.Encoding.PEM, | |
| format=serialization.PrivateFormat.TraditionalOpenSSL, | |
| encryption_algorithm=serialization.BestAvailableEncryption(str.encode(nifi_secret['Parameter']['Value']))) | |
| admin_public_bytes = admin_certificate.public_bytes( | |
| encoding=serialization.Encoding.PEM) | |
| # ADMIN PKCS12 | |
| admin_p12 = pkcs12.serialize_key_and_certificates( | |
| b"admin", | |
| admin_private_key, | |
| admin_certificate, | |
| None, | |
| serialization.BestAvailableEncryption(str.encode(nifi_secret['Parameter']['Value'])) | |
| ) | |
| # UPLOAD | |
| files = { | |
| 'nifi/certificates/ca/ca.pem': io.BytesIO(ca_public_bytes), | |
| 'nifi/certificates/ca/ca.key': io.BytesIO(ca_private_bytes), | |
| 'nifi/certificates/admin/admin_cert.pem': io.BytesIO(admin_public_bytes), | |
| 'nifi/certificates/admin/private_key.key': io.BytesIO(admin_private_bytes), | |
| 'nifi/certificates/admin/keystore.p12': io.BytesIO(admin_p12) | |
| } | |
| for key in files: | |
| s3.meta.client.upload_fileobj( | |
| files[key], | |
| 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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