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crcmod 1.7

Company: Ray Buvel
Date Added: September 22, 2013  |  Visits: 221

crcmod

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crcmod is a Python module for creating functions computing the Cyclic Redundancy Check (CRC). Any generating polynomial producing 8, 16, 24, 32, or 64 bit CRCs is allowed. Generated functions can be used in Python or C/C++ source code can be generated.<br /><br />Note: Includes version for Python 3.x<br /><br />Note: If you are simply looking for something to compute a strong checksum (typically referred to as a message digest) over some data, I strongly suggest you use the md5 module. As shown in the timing study included in this package, the MD5 algorithm has about the same performance as a 32-bit CRC generated with this module. In addition, MD5 is a cryptographically strong message digest. As discussed in RFC 1321, the probability of having the same digest for two data sets is 2^-64 which is the same as a 64-bit CRC. A CRC can be fooled into generating the same value by simply adding any multiple of the generator polynomial to the original message. This is very difficult to do with the MD5 algorithm.<br /><br />Here are some key features of "crcmod":<br /><br />?*A* Create Python functions for computing the CRC. If the optional extension module is installed, the calculations are preformed using fast C code.<br />?*A* Create instances of the Crc class that support the interface used by the md5 and sha modules in the Python standard library.<br />?*A* Generate C/C++ code that can be incorporated in another project.<br />?*A* Any generator polynomial producing 8, 16, 24, 32, or 64 bit CRCs is allowed.<br />?*A* Forward and bit-reverse algorithms are supported.<br /><br />#md5=2d5b92117d958dcead94f9e17f54cd32

Requirements: No special requirements
Platforms: *nix, Linux
Keyword: Calculations Cc2b2b Computing Crcmod Create Digest Extension Fooled Functions Generating Generator Installed Message Module Polynomial Preformed Producing Python Simply Strong
Users rating: 0/10

License: Freeware Size: 92.16 KB
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