title: Is there a LINUX command line tool for CRC32C (Castagnoli)
body: <p>I need to verify data using CRC32C, the Castagnoli variant of CRC32 calculation. I cannot find a self-contained command line utility anywhere that will calculate this to verify the values in question. CRC32? MD5? SHA? Check. CRC32C? You lose.</p>
  
  <p>I need a program. Has to be self contained (no non-standard PERL or Python modules that require installation...standard ones are okay). Probably no Java, as I cannot guarantee a Java installation. Ruby is right out. </p>
  
  <p>Clever "gzip" or "tar" tricks are fine. Needs to run on OS-X, Linux, and maybe Android.</p>
  
  <p>I could indeed write one (the code is in the RFC), but c'mon...that's sort of like</p>
  
  <p><em>"hmmm, my car uses synthetic oil...time for an oil change, let me go to the local refinery and make a few quarts"</em> </p>
  
  <p>or</p>
  
  <p><em>"Uncle Bill wants a PB&amp;J sandwich, but has a gluten allergy...let me go get some rice flour and make gluten-free bread"</em>.</p>
  
  <p>I found some libraries to calculate CRC32Cs, but no programs. Grumble.</p>
  
  <p><a href="https://developers.google.com/storage/docs/composite-objects?hl=ja" rel="nofollow">https://developers.google.com/storage/docs/composite-objects?hl=ja</a></p>