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fixed offset checking for empty files

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This commit is contained in:
Frank Morgner
2012-09-14 15:09:01 +02:00
parent c263b1f9dc
commit 8b3d802cab
1 changed files with 14 additions and 10 deletions
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24
virtualsmartcard/src/vpicc/virtualsmartcard/SmartcardFilesystem.py
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@@ -699,7 +699,7 @@ class MF(DF):
def dataUnitsDecodePlain(self, p1, p2, data):
"""
Decodes 'p1', 'p2' and 'data' from a data unit command (i. e.
read/write/update/search/erase binary) with *odd* instruction code.
read/write/update/search/erase binary) with *even* instruction code.
:returns: the specified TransparentStructureEF, a list of offsets and a
list of data strings.
@@ -725,7 +725,7 @@ class MF(DF):
def dataUnitsDecodeEncapsulated(self, p1, p2, data):
"""
Decodes 'p1', 'p2' and 'data' from a data unit command (i. e.
read/write/update/search/erase binary) with *even* instruction code.
read/write/update/search/erase binary) with *odd* instruction code.
:returns the specified TransparentStructureEF, a list of offsets and a
list of data strings.
@@ -1376,10 +1376,13 @@ class TransparentStructureEF(EF):
"""Returns the string of decrypted data beginning at 'offset'."""
data = self.data
if offset + 1 > len(data):
raise SwError(SW["ERR_OFFSETOUTOFFILE"])
if offset == 0:
return data
else:
if offset + 1 > len(data):
raise SwError(SW["ERR_OFFSETOUTOFFILE"])
return data[offset:]
return data[offset:]
def writebinary(self, offsets, datalist, datacoding=None):
"""
@@ -1587,13 +1590,14 @@ class RecordStructureEF(EF):
records = self.__getRecords(num_id, reference)
result = []
for r in records:
result.append(r.data[offset:])
if offset == 0:
pass
elif offset > 0 and offset > len(r.data):
offset -= len(r.data)
result.append(r.data)
else:
offset = 0
result.append(r.data[offset:])
if offset > 0 and offset > len(r.data):
offset -= len(r.data)
else:
offset = 0
return result