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 _construct(self):
if pyCryptoRSA is None:
raise CryptoException(CryptoException.NO_SUCH_ALGORITHM)
self._theKey = pyCryptoRSA.construct([_arrayTolong(self.modulus),
_arrayTolong(self.exponent)])
