crc32

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I'm looking for an implementation of CRC32 in C or C++ that is explicitly licensed as being no cost or public domain. The implementation here seems nice, but the only thing it says about the license is "source code", which isn't good enough. I'd prefer non LGPL so I don't have to fool around with a DLL (my app

问题 I\'m looking for a way to reverse a CRC32 checksum. There are solutions around, but they are either badly written, extremely technical and/or in Assembly. Assembly is (currently) beyond my ken, so I\'m hoping someone can piece together an implementation in a higher level language. Ruby is ideal, but I can parse PHP, Python, C, Java, etc. Any takers? 回答1: A CRC32 is only reversible if the original string is 4 bytes or less. 回答2: Read the document called "Reversing CRC Theory and Practice".

问题 How do I calculate the CRC32 (Cyclic Redundancy Checksum) of a string in .NET? 回答1: This guy seems to have your answer. https://damieng.com/blog/2006/08/08/calculating_crc32_in_c_and_net And in case the blog ever goes away or breaks the url, here's the github link: https://github.com/damieng/DamienGKit/blob/master/CSharp/DamienG.Library/Security/Cryptography/Crc32.cs Usage of the Crc32 class from the blog post: Crc32 crc32 = new Crc32(); String hash = String.Empty; using (FileStream fs = File

问题 So I have a design which incorporates CRC32C checksums to ensure data hasn\'t been damaged. I decided to use CRC32C because I can have both a software version and a hardware-accelerated version if the computer the software runs on supports SSE 4.2 I\'m going by Intel\'s developer manual (vol 2A), which seems to provide the algorithm behind the crc32 instruction. However, I\'m having little luck. Intel\'s developer guide says the following: BIT_REFLECT32: DEST[31-0] = SRC[0-31] MOD2: Remainder