Integrate local OpenSSL TSA for timestamping

Replaced HTTPTimeStamper with LocalOpensslTimestamp for TSA operations using a local OpenSSL CLI. Updated related configurations and dependencies to support this change, enhancing the timestamping process's reliability and security.

pythonProject/sign.py

@@ -7,11 +7,15 @@ from pyhanko.sign import signers, timestamps, fields
 from pyhanko_certvalidator import ValidationContext
 from typing_extensions import Buffer
 
+from pythonProject.timestamp import LocalOpensslTimestamp
+
 
 class SignOrchestrator:
     """Orchestrate the signature on document"""
 
-    def __init__(self, pkcs12_path: str, timestamp_url: str, pkcs12_password: Optional[bytes] = None):
+    def __init__(self, pkcs12_path: str,
+                 tsa_config_path: str, tsa_password: str, tsa_cert_chain: str,
+                 pkcs12_password: Optional[bytes] = None):
         # Load signer key material from PKCS#12 file
         # This assumes that any relevant intermediate certs are also included
         # in the PKCS#12 file.
@@ -20,9 +24,7 @@ class SignOrchestrator:
         )
 
         # Set up a timestamping client to fetch timestamps tokens
-        self.timestamper = timestamps.HTTPTimeStamper(
-            url=timestamp_url,
-        )
+        self.timestamper = LocalOpensslTimestamp(tsa_config_path, tsa_password, tsa_cert_chain)
 
         self.stamp_style = stamp.TextStampStyle(
             stamp_text="Signé par:\n%(signer_text)s\nLe %(ts)s",