inital commit - WIP code

parser/dpcdll/__init__.py

@@ -0,0 +1,3 @@
+from .dpcdll import parse
+
+__all__ = ['parse']

parser/dpcdll/dpcdll.py

@@ -0,0 +1,61 @@
+from struct import unpack
+
+
+def read_int(data, offset):
+    return unpack('<I', data[offset:offset + 4])[0]
+
+
+def parse(file_data):
+    lic_types = ['NULL', 'Volume', 'Retail', 'Evaluation', 'Tablet', 'OEM', 'Embedded']
+
+    dpc_data = {}
+
+    tmp = file_data
+    offset = tmp.find(b'\x00\x00\x00\xff\xff\xff\x7f\x80') - 21
+    del tmp
+
+    if offset == -22:
+        raise ValueError('Offset not found')
+
+    while file_data[offset:offset + 4] != b'\x00\x00\x00\x00':
+        offset -= 164
+
+    offset -= 4
+
+    while True:
+        if offset < 0 or offset + 32 >= len(file_data):
+            raise ValueError('Error in offset or not enough data')
+
+        ind = read_int(file_data, offset)
+        bink_id = hex(read_int(file_data, offset + 4)).zfill(4).upper()
+        min_pid = read_int(file_data, offset + 8)
+        max_pid = read_int(file_data, offset + 12)
+
+        if min_pid > 999 or max_pid > 999:
+            break
+
+        lic_type = read_int(file_data, offset + 16)
+
+        if lic_type > 6:
+            break
+
+        days_to_act = str(read_int(file_data, offset + 20))
+        eval_days = str(read_int(file_data, offset + 24))
+        sig_len = read_int(file_data, offset + 28)
+
+        if offset + 32 + sig_len >= len(file_data):
+            raise ValueError('Error in signature length or not enough data')
+
+        offset += 32 + sig_len
+
+        if bink_id not in dpc_data:
+            dpc_data[bink_id] = []
+
+        dpc_data[bink_id].append({
+            'Type': lic_types[lic_type],
+            'PIDRange': [min_pid, max_pid],
+            'EvaluationDays': eval_days,
+            'ActivationGraceDays': days_to_act
+        })
+
+    return dpc_data