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script.service.ultimate/lib/streaming_providers/base/drm_operations.py
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# ============================================================================
# streaming_providers/base/drm_operations.py
"""
DRM-related operations with caching and optimized PSSH extraction.
Two-phase plugin processing: GENERIC plugins first, then system-specific.
Caching strategy:
- All DRM configs are cached uniformly regardless of DRM system type.
- Exception: if ClearKey configs have FULL key coverage, only the ClearKey
configs are cached and returned (no need to involve upstream license servers).
- If ClearKey coverage is PARTIAL, all configs (ClearKey + others) are cached
and returned so upstream can decide which system to use.
- Unencrypted streams (DRMSystem.NONE) are never cached.
"""
import time
from threading import Lock
from typing import Dict, List, Optional, Tuple
from .drm import DRMPluginManager
from .models import DRMSystem, DRMConfig
from .utils.logger import logger
class PSSHCache:
"""Thread-safe cache for PSSH data"""
def __init__(self, ttl_seconds: int = 3600):
self.cache: Dict[str, Tuple[List, float]] = {}
self.ttl = ttl_seconds
self.lock = Lock()
def get(self, key: str) -> Optional[List]:
"""Get cached PSSH data if not expired"""
with self.lock:
if key in self.cache:
pssh_list, timestamp = self.cache[key]
if time.time() - timestamp < self.ttl:
logger.debug(f"Cache HIT for {key}")
return pssh_list
else:
logger.debug(f"Cache EXPIRED for {key}")
del self.cache[key]
return None
def set(self, key: str, pssh_list: List):
"""Cache PSSH data"""
with self.lock:
self.cache[key] = (pssh_list, time.time())
logger.debug(f"Cache SET for {key}")
def clear(self):
"""Clear all cache entries"""
with self.lock:
self.cache.clear()
logger.debug("Cache CLEARED")
class DRMConfigCache:
"""
Thread-safe cache for DRM configurations.
Caches all DRM config types uniformly. The caller is responsible for
deciding what to store (full ClearKey-only set vs. mixed set).
Simple TTL expiry — no stale-while-revalidate complexity.
"""
def __init__(self, ttl_seconds: int = 3600):
self.cache: Dict[str, Tuple[List, float]] = {}
self.ttl = ttl_seconds
self.lock = Lock()
def get(self, key: str) -> Optional[List]:
"""
Get cached DRM configs if not expired.
Returns:
List of DRMConfig if found and within TTL, None otherwise.
"""
with self.lock:
if key in self.cache:
drm_configs, timestamp = self.cache[key]
if time.time() - timestamp < self.ttl:
logger.debug(f"DRM Config Cache HIT for {key}")
return drm_configs
else:
logger.debug(f"DRM Config Cache EXPIRED for {key}")
del self.cache[key]
return None
def set(self, key: str, drm_configs: List):
"""Cache DRM configs"""
with self.lock:
self.cache[key] = (drm_configs, time.time())
logger.debug(f"DRM Config Cache SET for {key}")
def clear(self):
"""Clear all cache entries"""
with self.lock:
self.cache.clear()
logger.debug("DRM Config Cache CLEARED")
class DRMOperations:
"""Handles all DRM-related operations."""
def __init__(self, registry, cache_ttl: int = 3600):
self.registry = registry
self.drm_plugin_manager = DRMPluginManager()
self.pssh_cache = PSSHCache(ttl_seconds=cache_ttl)
self.drm_config_cache = DRMConfigCache(ttl_seconds=cache_ttl)
logger.debug("DRMOperations: Initialized with two-phase plugin processing")
@staticmethod
def _is_manifest_encrypted(manifest_content: str) -> bool:
"""
Check if manifest contains any DRM/encryption markers.
Returns True if encrypted, False if unencrypted.
Uses the new DRM models for consistent detection.
"""
import re
from ..base.models.drm import DRMSystem
# First, try to extract PSSH data using ManifestParser
from .utils.drm_extractor import DRMExtractor
pssh_list = DRMExtractor._extract_from_manifest_content(manifest_content)
if pssh_list:
# If we got PSSHData objects with valid DRM systems, it's encrypted!
for pssh in pssh_list:
if pssh.drm_system and pssh.drm_system != DRMSystem.NONE:
logger.debug(f"Detected DRM system: {pssh.drm_system.value} from PSSH data")
return True
# Fallback: Check for ContentProtection elements with known DRM UUIDs
cp_pattern = re.compile(
r'<ContentProtection[^>]*schemeIdUri="urn:uuid:([^"]+)"[^>]*>',
re.IGNORECASE
)
for match in cp_pattern.finditer(manifest_content):
uuid = match.group(1).lower()
drm_system = DRMSystem.from_uuid(uuid)
if drm_system:
logger.debug(f"Detected DRM system: {drm_system.value} (UUID: {uuid})")
return True
# Also check for cenc:default_KID (indicates encryption even without DRM system)
if re.search(r'(?:cenc:)?default_KID\s*=', manifest_content, re.IGNORECASE):
logger.debug("Detected cenc:default_KID attribute (encrypted)")
return True
# Check for PSSH boxes directly
if re.search(r'<(?:cenc:)?pssh[^>]*>', manifest_content, re.IGNORECASE):
logger.debug("Detected PSSH box (encrypted)")
return True
logger.debug("No DRM/encryption markers found (unencrypted)")
return False
@staticmethod
def _check_clearkey_coverage(
drm_configs: List[DRMConfig],
pssh_data_list: List
) -> Tuple[List[DRMConfig], bool]:
"""
Validate ClearKey configs against required KIDs from PSSH data and
determine coverage level.
Args:
drm_configs: List of DRM configs to check
pssh_data_list: PSSH data containing required KIDs
Returns:
Tuple of (validated_configs, has_full_coverage) where:
- validated_configs: configs with invalid ClearKey entries removed.
If ALL ClearKey configs are invalid, returns empty list.
- has_full_coverage: True if at least one ClearKey config covers
ALL required KIDs. False if coverage is partial or zero.
Notes:
- Non-ClearKey configs are always passed through unchanged.
- A ClearKey config is considered valid if it covers at least one
required KID (partial coverage is acceptable, but will not set
has_full_coverage=True).
- has_full_coverage=True means the caller may safely discard all
non-ClearKey configs and rely solely on ClearKey decryption.
"""
if not pssh_data_list:
logger.warning("No PSSH data available for ClearKey validation")
return drm_configs, False
# Extract all required key_ids from PSSH (normalized)
required_key_ids = set()
for pssh_data in pssh_data_list:
if pssh_data.key_ids:
required_key_ids.update(
kid.lower().replace("-", "") for kid in pssh_data.key_ids
)
if not required_key_ids:
logger.warning("No key_ids found in PSSH data")
return drm_configs, False
validated_configs = []
has_valid_clearkey = False
has_full_coverage = False
for config in drm_configs:
if config.system != DRMSystem.CLEARKEY:
validated_configs.append(config)
continue
# Validate ClearKey config
if not config.license or not config.license.keyids:
logger.warning("ClearKey config missing license.keyids — skipping")
continue
# Normalize provided KIDs
provided_kids = {
kid.lower().replace("-", "")
for kid in config.license.keyids.keys()
}
# Find intersection
valid_keys = required_key_ids & provided_kids
if valid_keys:
has_valid_clearkey = True
validated_configs.append(config)
if valid_keys == required_key_ids:
has_full_coverage = True
logger.info(
f"ClearKey config: full coverage — "
f"all {len(required_key_ids)} required KIDs present"
)
else:
logger.info(
f"ClearKey config: partial coverage — "
f"{len(valid_keys)}/{len(required_key_ids)} KIDs present "
f"(may limit available resolutions/tracks)"
)
else:
logger.error(
f"ClearKey config INVALID: none of the provided KIDs match "
f"the {len(required_key_ids)} required KIDs — discarding config"
)
# If all ClearKey configs were invalid, return empty list so the caller
# knows the stream is encrypted but we have no usable keys.
if any(c.system == DRMSystem.CLEARKEY for c in drm_configs) and not has_valid_clearkey:
logger.error(
"All ClearKey configs failed validation "
"(stream is encrypted but no valid keys available) — returning empty list"
)
return [], False
return validated_configs, has_full_coverage
@staticmethod
def _select_configs_for_cache_and_return(
configs: List[DRMConfig],
has_full_clearkey_coverage: bool
) -> List[DRMConfig]:
"""
Apply the caching/return selection rule:
- Full ClearKey coverage → return only ClearKey configs (discard others)
- Partial coverage or none → return all configs as-is
Args:
configs: Validated DRM configs
has_full_clearkey_coverage: Result of _check_clearkey_coverage
Returns:
The list that should be both cached and returned upstream.
"""
if has_full_clearkey_coverage:
clearkey_only = [c for c in configs if c.system == DRMSystem.CLEARKEY]
logger.info(
f"Full ClearKey coverage: returning {len(clearkey_only)} ClearKey config(s) only "
f"(discarding {len(configs) - len(clearkey_only)} other config(s))"
)
return clearkey_only
return configs
def get_channel_drm_configs(self, provider_name: str, channel_id: str, **kwargs) -> List:
"""
Get DRM configurations for a channel with two-phase plugin processing.
Phase 0: Fetch manifest, short-circuit if stream is unencrypted.
Phase 1: GENERIC plugins (pre-provider) — can generate configs from PSSH.
If Phase 1 produces configs:
- Full ClearKey coverage → cache ClearKey-only, return immediately.
- Partial ClearKey → fall through to Phase 2 for a better result.
- No ClearKey / invalid → fall through to Phase 2.
Phase 2: Provider DRM configs + system-specific plugin processing.
Apply coverage check, cache, and return.
Caching:
All resulting configs are cached uniformly with a simple TTL.
On cache hit the result is returned directly with no re-validation.
"""
cache_key = f"{provider_name}:{channel_id}"
manifest_content = None # stored to avoid redundant fetches
# ------------------------------------------------------------------
# Step 0: Resolve provider and inject proxy_config into kwargs
# ------------------------------------------------------------------
provider = self.registry.get_provider(provider_name)
if not provider:
raise ValueError(f"Provider '{provider_name}' not found or disabled")
if "proxy_config" not in kwargs:
http_mgr = getattr(provider, "http_manager", None)
if http_mgr is not None:
provider_proxy = getattr(getattr(http_mgr, "config", None), "proxy_config", None)
if provider_proxy is not None:
kwargs["proxy_config"] = provider_proxy
logger.debug(
f"DRMOperations: Injected proxy_config from provider "
f"'{provider_name}' into plugin kwargs "
f"({provider_proxy.host}:{provider_proxy.port})"
)
# ------------------------------------------------------------------
# Step 0a: Fetch manifest and short-circuit for unencrypted streams
# ------------------------------------------------------------------
manifest_url = provider.get_manifest(content_id=channel_id, **kwargs)
if manifest_url and manifest_url.startswith(('http://', 'https://')):
try:
from .network import HTTPManager
http = provider.http_manager if hasattr(provider, 'http_manager') else HTTPManager()
response = http.get(manifest_url, timeout=10, operation="api")
response.raise_for_status()
manifest_content = response.text
if not self._is_manifest_encrypted(manifest_content):
logger.info(f"Stream '{channel_id}' is unencrypted (no DRM in manifest)")
return [DRMConfig(system=DRMSystem.NONE, priority=0)]
logger.debug(f"Stream '{channel_id}' is encrypted, proceeding with DRM processing")
except Exception as e:
logger.warning(f"Failed to check manifest encryption for '{channel_id}': {e}")
manifest_content = None
# ------------------------------------------------------------------
# Step 1: DRM config cache — simple TTL, no stale revalidation
# ------------------------------------------------------------------
cached_configs = self.drm_config_cache.get(cache_key)
if cached_configs is not None:
logger.info(f"Using cached DRM configs for '{cache_key}'")
return cached_configs
# ------------------------------------------------------------------
# Step 2: PHASE 1 — Try GENERIC plugins first (if registered)
# ------------------------------------------------------------------
pssh_data_list = None # reused across phases to avoid re-fetching
if DRMSystem.GENERIC in self.drm_plugin_manager.plugins:
logger.debug(f"Phase 1: Attempting GENERIC plugin processing for '{channel_id}'")
generic_configs, pssh_data_list = self._try_generic_plugins(
provider_name, channel_id, cache_key, manifest_content, **kwargs
)
# Only proceed with generic configs if they contain real DRM systems
if generic_configs and any(c.system != DRMSystem.NONE for c in generic_configs):
logger.info(f"Phase 1: Generated {len(generic_configs)} configs via GENERIC plugin")
if pssh_data_list:
validated, has_full_coverage = self._check_clearkey_coverage(
generic_configs, pssh_data_list
)
else:
validated = generic_configs
has_full_coverage = False
if not validated:
# All ClearKey configs were invalid — fall through to Phase 2
logger.warning(
f"Phase 1: GENERIC plugins produced no valid ClearKey configs for "
f"'{channel_id}', falling back to provider DRM"
)
elif has_full_coverage:
# Best case: we have all the keys we need — no need for Phase 2
result = self._select_configs_for_cache_and_return(validated, has_full_coverage)
self.drm_config_cache.set(cache_key, result)
return result
else:
# Partial ClearKey coverage — fall through to Phase 2 to see if
# the provider can give us a better result. Keep validated and
# pssh_data_list in scope so Phase 2 can merge if needed.
logger.info(
f"Phase 1: Partial ClearKey coverage for '{channel_id}', "
f"continuing to Phase 2 for potentially better coverage"
)
else:
logger.debug(f"Phase 1: No actual DRM configs from GENERIC plugin, proceeding to provider")
generic_configs = None # ensure clean state for Phase 2
else:
generic_configs = None
# ------------------------------------------------------------------
# Step 3: PHASE 2 — Get provider's DRM configs
# ------------------------------------------------------------------
provider_drm_configs = provider.get_drm(content_id=channel_id, **kwargs)
# Secondary unencrypted check (in case manifest fetch failed earlier)
if not provider_drm_configs:
logger.info(f"Stream '{channel_id}' is unencrypted (no DRM configs from provider)")
return [DRMConfig(system=DRMSystem.NONE, priority=0)]
# ------------------------------------------------------------------
# Step 4: PHASE 2 — Extract PSSH if needed for system-specific plugins
# Reuse pssh_data_list from Phase 1 if already extracted.
# ------------------------------------------------------------------
if pssh_data_list is None and self.drm_plugin_manager.has_system_specific_plugins():
if self._needs_pssh_extraction(provider_drm_configs):
pssh_data_list = self.pssh_cache.get(cache_key)
if pssh_data_list is None:
if manifest_content:
logger.debug(f"Phase 2: Using cached manifest_content for PSSH extraction")
from .utils.drm_extractor import DRMExtractor
pssh_data_list = DRMExtractor._extract_from_manifest_content(manifest_content)
if pssh_data_list:
self.pssh_cache.set(cache_key, pssh_data_list)
if not pssh_data_list:
logger.debug(f"Phase 2: PSSH cache miss for {cache_key}, fetching manifest")
manifest_url = provider.get_manifest(content_id=channel_id, **kwargs)
if manifest_url:
pssh_data_list = self._extract_pssh_from_manifest(manifest_url, provider_name)
if pssh_data_list:
self.pssh_cache.set(cache_key, pssh_data_list)
else:
logger.debug(f"Phase 2: Using cached PSSH for {cache_key}")
# ------------------------------------------------------------------
# Step 5: PHASE 2 — Process through system-specific plugins.
# Snapshot provider_drm_configs first so we can reinstate any configs
# that a plugin replaced (e.g. PlayReady → ClearKey) if coverage turns
# out to be only partial.
# ------------------------------------------------------------------
provider_configs_snapshot = list(provider_drm_configs)
processed = self.drm_plugin_manager.process_system_specific_plugins(
provider_drm_configs, pssh_data_list if pssh_data_list else [], **kwargs
)
# ------------------------------------------------------------------
# Step 6: Merge Phase 1 partial ClearKey result (if any) with Phase 2
# output. Phase 1 configs whose DRM system is not already represented
# in Phase 2 are appended so upstream has the full picture.
# De-duplication is by DRM system to avoid two ClearKey entries.
# ------------------------------------------------------------------
if generic_configs:
phase2_systems = {c.system for c in processed}
extra = [c for c in generic_configs if c.system not in phase2_systems]
if extra:
logger.info(
f"Merging {len(extra)} Phase 1 config(s) into Phase 2 results"
)
processed = processed + extra
# ------------------------------------------------------------------
# Step 7: Validate ClearKey configs and determine coverage.
# If coverage is only partial, reinstate any original provider configs
# whose DRM system was replaced by a plugin but is no longer present
# in the processed list. This ensures upstream always has a complete
# fallback (e.g. PlayReady) alongside a partial ClearKey config.
# ------------------------------------------------------------------
if pssh_data_list and any(c.system == DRMSystem.CLEARKEY for c in processed):
processed, has_full_coverage = self._check_clearkey_coverage(processed, pssh_data_list)
else:
has_full_coverage = False
if not has_full_coverage:
# Find original provider systems that are no longer in processed
# (a plugin replaced them) and reinstate them.
processed_systems = {c.system for c in processed}
reinstated = [
c for c in provider_configs_snapshot
if c.system not in processed_systems
]
if reinstated:
logger.info(
f"Partial/no ClearKey coverage: reinstating "
f"{len(reinstated)} replaced provider config(s): "
f"{[c.system.name for c in reinstated]}"
)
processed = processed + reinstated
if not processed:
logger.error(
f"DRM processing failed for '{channel_id}': "
f"stream is encrypted but no valid DRM configs available"
)
return []
# ------------------------------------------------------------------
# Step 8: Apply selection rule, cache, and return
# ------------------------------------------------------------------
result = self._select_configs_for_cache_and_return(processed, has_full_coverage)
self.drm_config_cache.set(cache_key, result)
logger.info(
f"Processed DRM for '{channel_id}': returning {len(result)} config(s) "
f"({'full ClearKey' if has_full_coverage else 'mixed/partial'})"
)
return result
def _try_generic_plugins(
self,
provider_name: str,
channel_id: str,
cache_key: str,
manifest_content: Optional[str] = None,
**kwargs
) -> Tuple[Optional[List[DRMConfig]], Optional[List]]:
"""
Try to generate configs using GENERIC plugins.
Returns (configs, pssh_data_list) tuple. Both can be None.
IMPORTANT: Ensures PSSH data is complete (with KIDs) before calling plugins.
"""
# Get PSSH data (from cache or manifest)
pssh_data_list = self.pssh_cache.get(cache_key)
if pssh_data_list is None:
# Try to extract from provided manifest_content first
if manifest_content:
logger.debug(f"GENERIC plugin: Using cached manifest_content for '{channel_id}'")
from .utils.drm_extractor import DRMExtractor
pssh_data_list = DRMExtractor._extract_from_manifest_content(manifest_content)
if pssh_data_list:
self.pssh_cache.set(cache_key, pssh_data_list)
# If still no PSSH, fetch manifest
if not pssh_data_list:
logger.debug(f"GENERIC plugin: Fetching PSSH for '{provider_name}' / '{channel_id}'")
provider = self.registry.get_provider(provider_name)
if not provider:
logger.warning(f"Provider '{provider_name}' not found for GENERIC plugin")
return None, None
manifest_url = provider.get_manifest(content_id=channel_id, **kwargs)
if manifest_url:
pssh_data_list = self._extract_pssh_from_manifest(manifest_url, provider_name)
if pssh_data_list:
self.pssh_cache.set(cache_key, pssh_data_list)
if not pssh_data_list:
logger.debug(f"GENERIC plugin: No PSSH data available for '{channel_id}'")
return None, None
# CRITICAL: Check if PSSH is stub (no real data)
if self._has_stub_pssh(pssh_data_list):
logger.warning(
f"GENERIC plugin: PSSH data is incomplete (no KIDs) - extracting from init segment"
)
provider = self.registry.get_provider(provider_name)
if not provider:
logger.error(f"Cannot extract real PSSH: provider '{provider_name}' not found")
return None, pssh_data_list
manifest_url = provider.get_manifest(content_id=channel_id, **kwargs)
if manifest_url:
real_pssh = self._extract_pssh_from_manifest(manifest_url, provider_name)
if real_pssh and not self._has_stub_pssh(real_pssh):
logger.info(
f"GENERIC plugin: Successfully extracted complete PSSH with "
f"{sum(len(p.key_ids) for p in real_pssh)} KIDs from init segment"
)
pssh_data_list = real_pssh
self.pssh_cache.set(cache_key, pssh_data_list)
else:
logger.error(
f"GENERIC plugin: Failed to extract complete PSSH - "
f"Kid-Key plugin will not be called"
)
return None, pssh_data_list
else:
logger.error(f"GENERIC plugin: Cannot get manifest URL for init segment extraction")
return None, pssh_data_list
# Verify we now have complete PSSH
total_kids = sum(len(p.key_ids) for p in pssh_data_list)
if total_kids == 0:
logger.warning(
f"GENERIC plugin: PSSH has no KIDs even after extraction - "
f"Kid-Key plugin will not be called"
)
return None, pssh_data_list
logger.debug(f"GENERIC plugin: Processing with complete PSSH ({total_kids} KIDs)")
# Create a dummy config to pass to GENERIC plugin
dummy_configs = [DRMConfig(system=DRMSystem.NONE, priority=0)]
# Let GENERIC plugins try to generate configs
generic_configs = self.drm_plugin_manager.process_generic_plugins(
dummy_configs, pssh_data_list, **kwargs
)
return generic_configs if generic_configs else None, pssh_data_list
@staticmethod
def _has_stub_pssh(pssh_data_list: List) -> bool:
"""
Check if PSSH data is incomplete (stub).
Stub PSSH occurs when manifest has ContentProtection tags but no actual PSSH boxes.
Returns True if any PSSH is missing pssh_box or has no key_ids.
"""
if not pssh_data_list:
return True
for pssh in pssh_data_list:
if not pssh.pssh_box or not pssh.key_ids:
return True
return False
def _needs_pssh_extraction(self, drm_configs) -> bool:
"""Check if PSSH extraction is needed for system-specific plugins."""
config_systems = {config.system for config in drm_configs}
# Exclude GENERIC from this check (it's handled separately)
plugin_systems = {
sys for sys in self.drm_plugin_manager.plugins.keys()
if sys != DRMSystem.GENERIC
}
return bool(config_systems & plugin_systems)
def _extract_pssh_from_manifest(self, manifest_url: str, provider_name: Optional[str] = None) -> List:
"""Extract PSSH data from manifest using the provider's HTTPManager."""
from .utils.drm_extractor import DRMExtractor
from .network import HTTPManager
# 1. Validate the URL before attempting the request
if not manifest_url or not manifest_url.startswith(('http://', 'https://')):
logger.error(f"Invalid manifest URL provided: '{manifest_url}'. Cannot extract PSSH.")
return []
try:
# 2. Resolve the correct HTTP manager
http = None
if provider_name:
provider = self.registry.get_provider(provider_name)
if provider:
http = provider.http_manager
logger.debug(f"Using configured HTTPManager for provider: {provider_name}")
if not http:
logger.debug("No provider manager found; using default HTTPManager")
http = HTTPManager()
# 3. Perform the request
response = http.get(manifest_url, timeout=10, operation="api")
response.raise_for_status()
manifest_content = response.text
# 4. Standard PSSH extraction logic
pssh_list = DRMExtractor._extract_from_manifest_content(manifest_content)
# Check if we need segment extraction
needs_segment_extraction = not pssh_list or any(
not p.pssh_box or not p.key_ids for p in pssh_list
)
if needs_segment_extraction:
logger.debug("PSSH incomplete in manifest, extracting from init segment")
from .utils import ManifestParser
init_segment_url = ManifestParser.extract_single_init_segment_url(
manifest_content, manifest_url
)
if init_segment_url:
segment_pssh = DRMExtractor._extract_from_single_segment(
init_segment_url,
[p.system_id for p in pssh_list] if pssh_list else []
)
if segment_pssh:
return DRMExtractor._merge_pssh_data(pssh_list, segment_pssh)
return pssh_list
except Exception as e:
logger.warning(f"Failed to extract PSSH: {e}")
return []
def list_drm_plugins(self) -> Dict:
"""List registered DRM plugins."""
return self.drm_plugin_manager.list_plugins()
def clear_drm_plugins(self):
"""Clear all DRM plugins."""
self.drm_plugin_manager.clear_plugins()
def clear_pssh_cache(self):
"""Clear PSSH cache."""
self.pssh_cache.clear()
def clear_drm_config_cache(self):
"""Clear DRM config cache."""
self.drm_config_cache.clear()
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