def parse(self):
from fontTools.misc import psLib
from fontTools.misc import psCharStrings
self.font = psLib.suckfont(self.data)
charStrings = self.font["CharStrings"]
lenIV = self.font["Private"].get("lenIV", 4)
assert lenIV >= 0
subrs = self.font["Private"]["Subrs"]
for glyphName, charString in charStrings.items():
charString, R = eexec.decrypt(charString, 4330)
charStrings[glyphName] = psCharStrings.T1CharString(charString[lenIV:],
subrs=subrs)
for i in range(len(subrs)):
charString, R = eexec.decrypt(subrs[i], 4330)
subrs[i] = psCharStrings.T1CharString(charString[lenIV:], subrs=subrs)
del self.data
def starteexec(self):
self.pos = self.pos + 1
#self.skipwhite()
self.dirtybuf = self.buf[self.pos:]
self.buf, R = eexec.decrypt(self.dirtybuf, 55665)
self.len = len(self.buf)
self.pos = 4
def starteexec(self): self.pos = self.pos + 1 #self.skipwhite() self.dirtybuf = self.buf[self.pos:] self.buf, R = eexec.decrypt(self.dirtybuf, 55665) self.len = len(self.buf) self.pos = 4
def parse(self):
from fontTools.misc import psLib
from fontTools.misc import psCharStrings
self.font = psLib.suckfont(self.data)
charStrings = self.font["CharStrings"]
lenIV = self.font["Private"].get("lenIV", 4)
assert lenIV >= 0
subrs = self.font["Private"]["Subrs"]
for glyphName, charString in charStrings.items():
charString, R = eexec.decrypt(charString, 4330)
charStrings[glyphName] = psCharStrings.T1CharString(charString[lenIV:],
subrs=subrs)
for i in range(len(subrs)):
charString, R = eexec.decrypt(subrs[i], 4330)
subrs[i] = psCharStrings.T1CharString(charString[lenIV:], subrs=subrs)
del self.data
def decryptType1(data):
chunks = findEncryptedChunks(data)
data = []
for isEncrypted, chunk in chunks:
if isEncrypted:
if isHex(chunk[:4]):
chunk = deHexString(chunk)
decrypted, R = eexec.decrypt(chunk, 55665)
decrypted = decrypted[4:]
if decrypted[-len(EEXECINTERNALEND)-1:-1] != EEXECINTERNALEND \
and decrypted[-len(EEXECINTERNALEND)-2:-2] != EEXECINTERNALEND:
raise T1Error("invalid end of eexec part")
decrypted = decrypted[:-len(EEXECINTERNALEND)-2] + b'\r'
data.append(EEXECBEGINMARKER + decrypted + EEXECENDMARKER)
else:
if chunk[-len(EEXECBEGIN)-1:-1] == EEXECBEGIN:
data.append(chunk[:-len(EEXECBEGIN)-1])
else:
data.append(chunk)
return bytesjoin(data)
def decryptType1(data):
chunks = findEncryptedChunks(data)
data = []
for isEncrypted, chunk in chunks:
if isEncrypted:
if isHex(chunk[:4]):
chunk = deHexString(chunk)
decrypted, R = eexec.decrypt(chunk, 55665)
decrypted = decrypted[4:]
if decrypted[-len(EEXECINTERNALEND)-1:-1] <> EEXECINTERNALEND \
and decrypted[-len(EEXECINTERNALEND)-2:-2] <> EEXECINTERNALEND:
raise T1Error, "invalid end of eexec part"
decrypted = decrypted[:-len(EEXECINTERNALEND) - 2] + '\r'
data.append(EEXECBEGINMARKER + decrypted + EEXECENDMARKER)
else:
if chunk[-len(EEXECBEGIN) - 1:-1] == EEXECBEGIN:
data.append(chunk[:-len(EEXECBEGIN) - 1])
else:
data.append(chunk)
return string.join(data, '')
def findEncryptedChunks(data):
chunks = []
while True:
eBegin = data.find(EEXECBEGIN)
if eBegin < 0:
break
eBegin = eBegin + len(EEXECBEGIN) + 1
eEnd = data.find(EEXECEND, eBegin)
if eEnd < 0:
raise T1Error("can't find end of eexec part")
cypherText = data[eBegin:eEnd + 2]
if isHex(cypherText[:4]):
cypherText = deHexString(cypherText)
plainText, R = eexec.decrypt(cypherText, 55665)
eEndLocal = plainText.find(EEXECINTERNALEND)
if eEndLocal < 0:
raise T1Error("can't find end of eexec part")
chunks.append((0, data[:eBegin]))
chunks.append((1, cypherText[:eEndLocal + len(EEXECINTERNALEND) + 1]))
data = data[eEnd:]
chunks.append((0, data))
return chunks
def findEncryptedChunks(data):
chunks = []
while 1:
eBegin = string.find(data, EEXECBEGIN)
if eBegin < 0:
break
eBegin = eBegin + len(EEXECBEGIN) + 1
eEnd = string.find(data, EEXECEND, eBegin)
if eEnd < 0:
raise T1Error, "can't find end of eexec part"
cypherText = data[eBegin:eEnd + 2]
if isHex(cypherText[:4]):
cypherText = deHexString(cypherText)
plainText, R = eexec.decrypt(cypherText, 55665)
eEndLocal = string.find(plainText, EEXECINTERNALEND)
if eEndLocal < 0:
raise T1Error, "can't find end of eexec part"
chunks.append((0, data[:eBegin]))
chunks.append((1, cypherText[:eEndLocal + len(EEXECINTERNALEND) + 1]))
data = data[eEnd:]
chunks.append((0, data))
return chunks
def findEncryptedChunks(data):
chunks = []
while True:
eBegin = data.find(EEXECBEGIN)
if eBegin < 0:
break
eBegin = eBegin + len(EEXECBEGIN) + 1
endMatch = EEXECEND.search(data, eBegin)
if endMatch is None:
raise T1Error("can't find end of eexec part")
eEnd = endMatch.start()
cypherText = data[eBegin:eEnd + 2]
if isHex(cypherText[:4]):
cypherText = deHexString(cypherText)
plainText, R = eexec.decrypt(cypherText, 55665)
eEndLocal = plainText.find(EEXECINTERNALEND)
if eEndLocal < 0:
raise T1Error("can't find end of eexec part")
chunks.append((0, data[:eBegin]))
chunks.append((1, cypherText[:eEndLocal + len(EEXECINTERNALEND) + 1]))
data = data[eEnd:]
chunks.append((0, data))
return chunks
def test_decrypt():
testStr = b"\0\0asdadads asds\265"
decryptedStr, R = decrypt(testStr, 12321)
assert decryptedStr == b'0d\nh\x15\xe8\xc4\xb2\x15\x1d\x108\x1a<6\xa1'
assert R == 36142
