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I am searching for an open source hash calculator that I can download to verify my Tails .iso image, but I also want to be able to to calculate some password hashes with a sha512 hash (which is why I don't trust online hashing websites since they can steal the password and the corresponding hash in their database, I think).

I haven't been able to find one, so is there any that you would recommend?

closed as off-topic by Neil Smithline, Anders, wireghoul, WhiteWinterWolf, Rory Alsop Jun 29 '16 at 10:58

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    Software recommendations are off-topic here, but maybe checkout softwarerecs.stackexchange.com . Make sure you read their help center for how to ask a good question, it's not super clear what you are looking for. I also suspect most *nix software come with everything you need. – Alexander O'Mara Jun 28 '16 at 16:40
  • Oh yes... The competition among SHA-calculating software vendors is so fierce and the software evolves so fast that it's indeed a dreadful software recommendation request. And OP should instead specify the purpose. For example that it's for verifying a downloaded .iso image or hashing passwords locally. Oh, wait, OP did that... – techraf Jun 29 '16 at 0:35
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There are a couple of open source methods for creating sha512 hashes.

  • There is a mkpassword libary as mentioned in this article for Linux:

    mkpasswd  -m sha-512 -S saltsalt -s <<< YourPass
    
  • Using Python and the crypt library as stated in another post:

    python -c 'import crypt; print crypt.crypt("test", "$6$random_salt")
    

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