pad and unpad byte array，padunpad,Demonstrates

pad and unpad byte array，padunpad,Demonstrates

Demonstrates using the pad and unpad methods of CkByteArray.

import chilkatdata = chilkat.CkByteData()data.append(\'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\x09\',10)#  These are the padding options for the \"pad\" method:#  0 = Each padding byte is the pad count (16 extra added if size is already a multiple of 16)#  1 = Random bytes except the last is the pad count (16 extra added if size is already multiple of 16)#  2 = Pad with random data. (If already a multiple of 16, no padding is added).#  3 = Pad with NULLs. (If already a multiple of 16, no padding is added).#  4 = Pad with SPACE chars(0x20). (If already a multiple of 16, no padding is added).#  We\'ll pad to a block size of 16 bytes.blockSize = 16paddingScheme = 0#  Pad, display the padded byte data, unpad, then re-displaydata.pad(blockSize,paddingScheme)print data.getEncoded(\"hex\")data.unpad(16,paddingScheme)print data.getEncoded(\"hex\")print \"----\"paddingScheme = 1#  Pad, display the padded byte data, unpad, then re-displaydata.pad(blockSize,paddingScheme)print data.getEncoded(\"hex\")data.unpad(16,paddingScheme)print data.getEncoded(\"hex\")print \"----\"#  There is no unpadding with schemes 2,3, and 4data2 = chilkat.CkByteData()data2.append(\'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\x09\',10)paddingScheme = 2#  Pad and display the padded byte datadata2.pad(blockSize,paddingScheme)print data2.getEncoded(\"hex\")print \"----\"#  There is no unpadding with schemes 2,3, and 4data3 = chilkat.CkByteData()data3.append(\'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\x09\',10)paddingScheme = 3#  Pad and display the padded byte datadata3.pad(blockSize,paddingScheme)print data3.getEncoded(\"hex\")print \"----\"#  There is no unpadding with schemes 2,3, and 4data4 = chilkat.CkByteData()data4.append(\'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\x09\',10)paddingScheme = 4#  Pad and display the padded byte datadata4.pad(blockSize,paddingScheme)print data4.getEncoded(\"hex\")print \"----\"#该片段来自于http://byrx.net