Revize bbcb7c89

Re #8472 - Implemented create_ca method in CertificateService and added test verifying this method's validity

src/services/certificate_service.py

@@ -1 @@
-from src.constants import ROOT_CA_ID
+from src.constants import ROOT_CA_ID, INTERMEDIATE_CA_ID
 from src.dao.certificate_repository import CertificateRepository
 from src.model.certificate import Certificate
 from src.model.private_key import PrivateKey
@@ -8 +8 @@
 import time
 
 DATE_FORMAT = "%d.%m.%Y %H:%M:%S"
+CA_EXTENSIONS = "basicConstraints=critical,CA:TRUE"
 
 
 class CertificateService:
@@ -16 +17 @@
         self.cryptography_service = cryptography_service
         self.certificate_repository = certificate_repository
 
+    # TODO usages present in method parameters but not in class diagram
     def create_root_ca(self, key: PrivateKey, subject: Subject, extensions: str = "", config: str = ""):
         # create a new self signed  certificate
         cert_pem = self.cryptography_service.create_sscrt(subject, key.private_key, key_pass=key.password,
@@ -40 +42 @@
 
         return certificate
 
+    # TODO config parameter present in class diagram but not here (unused)
+    def create_ca(self, subject_key: PrivateKey, subject: Subject, issuer_cert: Certificate, issuer_key: PrivateKey,
+                  extensions: str = "", days: int = 30):
+        extensions = extensions + "\n" + CA_EXTENSIONS
+        # TODO implement AIA URI via extensions
+        cert_pem = self.cryptography_service.create_crt(subject, subject_key.private_key, issuer_cert.pem_data,
+                                                        issuer_key.private_key,
+                                                        subject_key_pass=subject_key.password,
+                                                        issuer_key_pass=issuer_key.password, extensions=extensions,
+                                                        days=days)
+
+        # parse the generated pem for subject and notBefore/notAfter fields
+        subj, not_before, not_after = self.cryptography_service.parse_cert_pem(cert_pem)
+
+        # format the parsed date
+        not_before_formatted = time.strftime(DATE_FORMAT, not_before)
+        not_after_formatted = time.strftime(DATE_FORMAT, not_after)
+
+        # create a certificate wrapper
+        certificate = Certificate(-1, subject.common_name, not_before_formatted, not_after_formatted, cert_pem,
+                                  subject_key.private_key_id, INTERMEDIATE_CA_ID, 0, {})
+
+        # store the wrapper into the repository
+        created_id = self.certificate_repository.create(certificate)
+
+        # assign the generated ID to the inserted certificate
+        certificate.certificate_id = created_id
+
+        return certificate
+
     def get_certificate(self, unique_id: int) -> Certificate:
         return self.certificate_repository.read(unique_id)