def doFinal(self, inBuff, inOffset, inLength, outBuff, outOffset):
Cipher.doFinal(self, inBuff, inOffset, inLength, outBuff, outOffset)
data = [0 for i in xrange(inLength)]
Util.arrayCopy(inBuff, inOffset, data, 0, inLength)
if ((self.algorithm == self.ALG_RSA_PKCS1) and
(self.mode == self.MODE_ENCRYPT)):
data = self.EME_PKCS1_v1_5_enc(data)
if len(data) != (self._theKey.getSize() // 8):
raise CryptoException(CryptoException.ILLEGAL_VALUE)
if self.mode == self.MODE_ENCRYPT:
(res, ) = self._theKey._theKey.encrypt(_arrayTolong(data), None)
else:
res = self._theKey._theKey.decrypt(_arrayTolong(data))
buf = _longToArray(res)
# remove padding
if ((self.algorithm == self.ALG_RSA_PKCS1) and
(self.mode == self.MODE_DECRYPT)):
buf = self.EME_PKCS1_v1_5_dec(buf)
Util.arrayCopy(buf, 0, outBuff, outOffset, len(buf))
return len(buf)
def doFinal(self, inBuff, inOffset, inLength, outBuff, outOffset):
Cipher.doFinal(self, inBuff, inOffset, inLength, outBuff, outOffset)
data = [0 for i in xrange(inLength)]
Util.arrayCopy(inBuff, inOffset, data, 0, inLength)
data = _arrayTobinary(data)
if self.mode == Cipher.MODE_ENCRYPT:
result = self._cipher.encrypt(data)
else:
result = self._cipher.decrypt(data)
result = _binaryToarray(result)
Util.arrayCopy(result, 0, outBuff, outOffset, len(result))
return len(result)
def init(self, theKey, theMode, bArray = [0,0,0,0,0,0,0,0], bOff = 0, bLen = 8):
Cipher.init(self, theKey, theMode, bArray, bOff, bLen)
if not isinstance(theKey, pyDesDESKey):
raise CryptoException(CryptoException.ILLEGAL_VALUE)
if bLen != 8:
raise CryptoException(CryptoException.ILLEGAL_VALUE)
iv = [0 for i in xrange(8)]
Util.arrayCopy(bArray, bOff, iv, 0, bLen)
iv = _arrayTobinary(iv)
if 64 == theKey.getSize():
# DES
self._cipher = pyDes.des(theKey._key, self.desmode, iv,
padmode = self.padmode)
def toBytes(self, outBuf, bOff, numBytes, arrayFormat):
array = []
if arrayFormat == self.FORMAT_BCD:
value = self._value
while value > 0:
array.append(to_bcd(value % 100))
value = value // 100
elif arrayFormat == self.FORMAT_HEX:
value = self._value
while value > 0:
array.append(to_hex(value & 0xff))
value = value >> 8
else:
raise ArithmeticException
if numBytes < len(array):
raise ArithmeticException
array.extend([0 for i in range(numBytes - len(array))])
array.reverse()
Util.arrayCopy(array, 0, outBuf, bOff, numBytes)
def _toBytesBound(self, outBuf, bOff):
bLen = self._tag.toBytes(outBuf, bOff)
if self._length > 127:
length = self._length
chunks = []
while length > 127:
chunks.append(length & 0xff)
length = length >> 8
chunk.reverse()
lLen = len(chunk)
outBuf[bOff+bLen] = 0x80 | lLen
bLen += 1
Util.arrayCopy(chunk, 0, outBuf, bOff+bLen, lLen)
bLen += lLen
else:
outBuf[bOff+bLen] = self._length
bLen += 1
Util.arrayCopy(self._value, 0, outBuf, bOff+bLen, self._length)
return bLen + self._length
def getModulus(self, buffer, offset):
Util.arrayCopy(self.modulus, 0, buffer, offset, len(self.modulus))
return len(self.modulus)
def getExponent(self, buffer, offset):
Util.arrayCopy(self.exponent, 0, buffer, offset, len(self.exponent))
return len(self.exponent)
def replaceValue(self, vArray, vOff, vLen):
self._value = [0 for i in range(vLen)]
Util.arrayCopy(vArray, vOff, self._value, 0, vLen)
self._length = vLen
def getValue(self, tlvValue, tOff):
Util.arrayCopy(self._value, 0, tlvValue, tOff, self._length)
return self._length
def testArrayCopy(self):
a1 = [1,2,3,4,5]
a2 = [0,0,0,0,0,0,0,0,0]
Util.arrayCopy(a1, 2, a2, 0, 3)
self.assertEquals(a1[2:2+3], a2[0:0+3])