How do I create a SHA1 hash in ruby?

Question

SHA-1 is has been shown to be insecure. Consider using safer alternatives, such as SHA-256, or SHA-3. https://shattered.io/ — Jonas Elfström, Mar 23 '17 at 12:54

score 397 · Accepted Answer · answered Aug 29 '08 at 15:56

397

require 'digest/sha1'
Digest::SHA1.hexdigest 'foo'

answered Aug 29 '08 at 15:56

devstopfix

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There's also `Digest::SHA1.base64digest 'foo'` – andrewrk Jan 14 '12 at 01:31
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FYI: `Digest` is part of the Ruby Standard Library (http://www.ruby-doc.org/stdlib-1.9.2/libdoc/digest/rdoc/index.html). It includes implementations for SHA1, SHA2, MD5 and others hash algorithms. – jwfearn Jun 11 '12 at 18:07
FYI, you should use `Digest::SHA2.hexdigest` now as it is more secure and has not (yet) been found to have any collisions. – Joshua Pinter Sep 18 '20 at 15:22

Thiago Ganzarolli · Answer 2 · 2011-05-11T20:42:30.413

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For a Base64 encoded hash, to validated an Oauth signature, I used

require 'base64'
require 'hmac-sha1'

Base64.encode64((HMAC::SHA1.new('key') << 'base').digest).strip

edited May 11 '11 at 20:42

answered May 11 '11 at 18:25

Thiago Ganzarolli

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FYI, the 'hmac-sha1' requirement is met from the gem 'ruby-hmac' – andrewrk Jan 14 '12 at 01:48

score 7 · Answer 3 · answered Nov 06 '13 at 17:51

7

I created a helper gem which is a simple wrapper around some sha1 code

require 'rickshaw'
> Rickshaw::SHA1.hash('LICENSE.txt')

 => "4659d94e7082a65ca39e7b6725094f08a413250a" 

> "hello world".to_sha1

 => "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed"

answered Nov 06 '13 at 17:51

Gregory Ostermayr

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score -24 · Answer 4 · edited Mar 26 '13 at 05:12

-24

Where 'serialize' is some user function defined elsewhere.

 def generateKey(data)
    return Digest::SHA1.hexdigest ("#{serialize(data)}")
 end

edited Mar 26 '13 at 05:12

Ashley Raiteri

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answered Mar 11 '11 at 04:55

r4ccoon

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Isn't this a duplicate of @devstopfix's answer? – Andrew Grimm May 11 '11 at 23:43
even if it is, it's some pretty ugly ruby code to be suggesting, and doesn't even mention that it needs `require \'digest/sha1\'' -1 – Rixius May 23 '11 at 18:20
16

Don't forget that stackoverflow has too many visitors, why you don't show us the right way to do it? Less critics more code examples – Davidslv Jun 22 '11 at 11:39
1

what's this 'serialize' function? that's not a part of ruby. Worse yet, the string being passed to hexdigest isn't dynamic at all! This method would return the same hash regardless what data you give it! – Blixxy Jul 07 '12 at 10:10
2

Need `require 'digest/sha1'` in order to use `SHA1` method. – Gus Shortz May 16 '13 at 19:22

How do I create a SHA1 hash in ruby?

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