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Support for decrypting the linktarget that is used for symlinks. #304

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Merged
rossengeorgiev merged 1 commit into from Feb 11, 2021
Merged

Support for decrypting the linktarget that is used for symlinks. #304

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24 changes: 24 additions & 0 deletions steam/core/manifest.py
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,22 @@ def filename(self):
:type: str
"""
return os.path.join(*self.filename_raw.split('\\'))

@property
def linktarget_raw(self):
"""Link target with null terminator and whitespaces removed

:type: str
"""
return self.file_mapping.linktarget.rstrip('\x00 \n\t')

@property
def linktarget(self):
"""Link target matching the OS

:type: str
"""
return os.path.join(*self.linktarget_raw.split('\\'))

@property
def size(self):
Expand Down Expand Up @@ -177,13 +193,21 @@ def decrypt_filenames(self, depot_key):
for mapping in self.payload.mappings:
filename = b64decode(mapping.filename)

if mapping.linktarget:
linktarget = b64decode(mapping.linktarget)

try:
filename = symmetric_decrypt(filename, depot_key)
if mapping.linktarget:
linktarget = symmetric_decrypt(linktarget, depot_key)
except Exception:
raise RuntimeError("Unable to decrypt filename for depot manifest")

mapping.filename = filename

if mapping.linktarget:
mapping.linktarget = linktarget

self.metadata.filenames_encrypted = False

def deserialize(self, data):
Expand Down