feat(cdm): Enhance key retrieval logic and improve cached keys handling

CHANGELOG.md

@@ -5,6 +5,43 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.4.4] - 2025-09-02
+
+### Added
+
+- **Enhanced DecryptLabs CDM Support**: Comprehensive remote CDM functionality
+  - Full support for Widevine, PlayReady, and ChromeCDM through DecryptLabsRemoteCDM
+  - Enhanced session management and caching support for remote WV/PR operations
+  - Support for cached keys and improved license handling
+  - New CDM configurations for Chrome and PlayReady devices with updated User-Agent and service certificate
+- **Advanced Configuration Options**: New device and language preferences
+  - Added configuration options for device certificate status list
+  - Enhanced language preference settings
+
+### Changed
+
+- **DRM Decryption Enhancements**: Streamlined decryption process
+  - Simplified decrypt method by removing unused parameter and streamlined logic
+  - Improved DecryptLabs CDM configurations with better device support
+
+### Fixed
+
+- **Matroska Tag Compliance**: Enhanced media container compatibility  
+  - Fixed Matroska tag compliance with official specification
+- **Application Branding**: Cleaned up version display
+  - Removed old devine version reference from banner to avoid developer confusion
+  - Updated branding while maintaining original GNU license compliance
+- **IP Information Handling**: Improved geolocation services
+  - Enhanced get_ip_info functionality with better failover handling
+  - Added support for 429 error handling and multiple API provider fallback
+  - Implemented cached IP info retrieval with fallback tester to avoid rate limiting
+- **Dependencies**: Streamlined package requirements
+  - Removed unnecessary data extra requirement from langcodes
+
+### Removed
+
+- Deprecated version references in application banner for clarity
+
 ## [1.4.3] - 2025-08-20
 
 ### Added

unshackle/core/cdm/decrypt_labs_remote_cdm.py

@@ -110,6 +110,7 @@ class DecryptLabsRemoteCDM:
         self.device_name = device_name
         self.service_name = service_name or ""
         self.vaults = vaults
+        self.uch = self.host != "https://keyxtractor.decryptlabs.com"
 
         self._device_type_str = device_type
         if device_type:
@@ -308,32 +309,9 @@ class DecryptLabsRemoteCDM:
                 if key and key.count("0") != len(key):
                     return True
 
-        if self.service_name:
+        session_keys = session.get("keys", [])
-            try:
+        if session_keys and len(session_keys) > 0:
-                key_ids = []
+            return True
-                if hasattr(pssh, "key_ids"):
-                    key_ids = [kid.hex for kid in pssh.key_ids]
-                elif hasattr(pssh, "kids"):
-                    key_ids = [kid.hex for kid in pssh.kids]
-
-                if key_ids:
-                    response = self._http_session.post(
-                        f"{self.host}/get-cached-keys",
-                        json={"service": self.service_name, "kid": key_ids},
-                        timeout=30,
-                    )
-
-                if response.status_code == 200:
-                    data = response.json()
-                    return (
-                        data.get("message") == "success"
-                        and "cached_keys" in data
-                        and isinstance(data["cached_keys"], list)
-                        and len(data["cached_keys"]) > 0
-                    )
-
-            except Exception:
-                pass
 
         return False
 
@@ -366,11 +344,7 @@ class DecryptLabsRemoteCDM:
         session["pssh"] = pssh_or_wrm
         init_data = self._get_init_data_from_pssh(pssh_or_wrm)
 
-        if self.has_cached_keys(session_id):
+        request_data = {"scheme": self.device_name, "init_data": init_data, "get_cached_keys_if_exists": True}
-            self._load_cached_keys(session_id)
-            return b""
-
-        request_data = {"scheme": self.device_name, "init_data": init_data}
 
         if self.device_name in ["L1", "L2", "SL2", "SL3"] and self.service_name:
             request_data["service"] = self.service_name
@@ -514,29 +488,6 @@ class DecryptLabsRemoteCDM:
                 if key and key.count("0") != len(key):
                     keys.append({"kid": kid.hex, "key": key, "type": "CONTENT"})
 
-        if not keys and self.service_name:
-            try:
-                key_ids = []
-                if hasattr(pssh, "key_ids"):
-                    key_ids = [kid.hex for kid in pssh.key_ids]
-                elif hasattr(pssh, "kids"):
-                    key_ids = [kid.hex for kid in pssh.kids]
-
-                if key_ids:
-                    response = self._http_session.post(
-                        f"{self.host}/get-cached-keys",
-                        json={"service": self.service_name, "kid": key_ids},
-                        timeout=30,
-                    )
-
-                    if response.status_code == 200:
-                        data = response.json()
-                        if data.get("message") == "success" and "cached_keys" in data:
-                            keys = self._parse_cached_keys(data["cached_keys"])
-
-            except Exception:
-                pass
-
         session["keys"] = keys
 
     def _parse_cached_keys(self, cached_keys_data: List[Dict[str, Any]]) -> List[Dict[str, Any]]:

unshackle/core/utils/tags.py

@@ -8,10 +8,10 @@ import tempfile
 from difflib import SequenceMatcher
 from pathlib import Path
 from typing import Optional, Tuple
+from xml.sax.saxutils import escape
 
 import requests
 from requests.adapters import HTTPAdapter, Retry
-from xml.sax.saxutils import escape
 
 from unshackle.core import binaries
 from unshackle.core.config import config