How to use GnuPG to generate sha512sum hash?

[Moses]

O...I see.
I've get the correct hash on Linux..., thank you all! :-)

The problem remains now is how to get the same hashing on Windows,
because echo on windows does not have -n flag:
     > echo -n AAA
     -n AAA
so, on windows "echo -n AAA | gpg --print-md sha1" is actually hashing
"-n AAA\n" but not "AAA"...   :-\

Is there a easy way to get rid of the newline on windows system?

Best regards.







On 8/31/07, David Shaw <dshaw at jabberwocky.com> wrote:
> On Fri, Aug 31, 2007 at 07:22:00PM +0800, Moses wrote:
> > Hi,
> >
> > (Sorry for last mail, FireGPG truncated my mail...so here it should be)
> >
> > Thank you for your reply, it works. But hash results that I got from
> > GPG is different from some web based hash calculator, such as,
> > http://www.johnmaguire.us/tools/hashcalc/ or
> > http://people.eku.edu/styere/Encrypt/JS-SHA1.html
> >
> > e.g. for "AAA",
> > web based SHA1 result is:
> > 606ec6e9bd8a8ff2ad14e5fade3f264471e82251
> > , and SHA512 result is:
> > 8d708d18b54df3962d696f069ad42dad7762b5d4d3c97ee5fa2dae0673ed46545164c078b8db3d59c4b96020e4316f17bb3d91bf1f6bc0896bbe75416eb8c385
> >
> > but GPG's result is:
> > > echo AAA | gpg --print-md SHA1
> > 1AE0 9EE3 43FA 9C61 8DE7  C5C1 770E F4E4 90B2 4ADA
> >
> > > echo AAA | gpg --print-md SHA512
> > 1CD99029 6017D85F 8B909505 21AE360D C8D907C3 A09B14AB 5B273F85
> > 7BC2F166 B90B3889 07DF7A7C A383D585 D555F383 92B1101E 0A2B1829
> > 0D966F54 25036FDB
> >
> > Due to I have try more than one web-based cryptographic hash
> > calculator. I don't think online results are wrong. All of them
> > generates the same results except GPG.
>
> You are making a mistake with "echo".  By default, echo adds a newline
> at the end of what it prints.  You are hashing "AAA" on the website,
> and "AAA\n" with GPG, so naturally they don't match.
>
> Add the "-n" flag to echo to tell it to not add a newline, and you
> will see the results match:
>
>   echo -n AAA | gpg --print-md sha512
>
> David
>
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