HMAC-SHA256/512 non 32 byte keys supporting #166

gdwrd · 2017-12-14T15:33:19Z

Hi,
Here is my PR with non 32 keys supporting.
HMAC RFC 2104: https://tools.ietf.org/html/rfc2104#section-3
Thanks!

gdwrd · 2017-12-14T15:34:25Z

gdwrd · 2017-12-19T10:45:44Z

Hi @tarcieri, what do you think about my PR?

tarcieri · 2017-12-19T16:53:35Z

I think if you're doing this much, you might as well expose the full IUF API... and ideally make it API-compatible with OpenSSL::HMAC

gdwrd · 2017-12-21T14:43:21Z

@tarcieri You mean, change hmac512256 libsodium calls to Init/Update/Final API? And what about OpenSSL::HMAC?

tarcieri · 2017-12-21T15:01:21Z

@nsheremet you've done most of the work here to expose the IUF API (i.e. initialize, update, finalize or as the OpenSSL::HMAC, or perhaps more generally the Ruby Digest API calls them #initialize, #update, and #digest), but it's not a particularly friendly or idiomatic API. I think if you're adding access to this API it probably should be, and would ideally implement something more akin to a Ruby Digest or OpenSSL::HMAC

gdwrd · 2017-12-21T15:17:31Z

@tarcieri hm. I will add IUF Api soon.

… hmacsha512256

gdwrd · 2018-01-11T16:05:50Z

@tarcieri Hi, I pushed some updates. Can you review, please?

tarcieri · 2018-01-12T07:00:18Z

I can review it soon

gdwrd · 2018-01-23T09:08:53Z

Hi @tarcieri, did you see the PR?

tarcieri · 2018-01-24T06:13:15Z

@nsheremet yes, sorry, I haven't had time to review it

tarcieri · 2018-02-12T00:14:43Z

lib/rbnacl/hmac/sha256.rb

+      # @params [#to_str] message message to construct an authenticator for
+      def update(message)
+        self.class.auth_hmacsha256_update(@state, message, message.bytesize)
+        self.class.auth_hmacsha256_final(@state.clone, @authenticator)


This should probably be moved to #digest below so as to allow #update to be called multiple times. I'm also curious how this handles #update being called after it's been finalized. That should probably raise an exception.

Hi @tarcieri. You can use this update multiple times.
But the point is, #update method without calling this line self.class.auth_hmacsha256_final(@state.clone, @authenticator) every time will be rewriting the @state. I can add spec test to compare with openssl multiple usage. But I know that it's work because I test it.

here is RbNaCl example:

pry(main)> key = ['07c0'].pack('H*') pry(main)> hmac = RbNaCl::HMAC::SHA256.new(key) pry(main)> hmac.update 'abcd' pry(main)> hmac.update '1' pry(main)> hmac.digest => "G\xCC[\xBDI\x1A\xA3\x95\xCD\xA2@\xC2\xB2L\xCD\xE9\x03kV\xDA\x7F\xAB@\xBE\xB5\xA7V\x1C\x11G\xBE\xD8"

OpenSSL example:

pry(main)> key = ['07c0'].pack('H*') pry(main)> hmac = OpenSSL::HMAC.new(key, d) pry(main)> hmac.update 'abcd' pry(main)> hmac.update '1' pry(main)> hmac.digest => "G\xCC[\xBDI\x1A\xA3\x95\xCD\xA2@\xC2\xB2L\xCD\xE9\x03kV\xDA\x7F\xAB@\xBE\xB5\xA7V\x1C\x11G\xBE\xD8"

tarcieri · 2018-02-12T00:15:53Z

lib/rbnacl/hmac/sha512.rb

+      # @params [#to_str] message message to construct an authenticator for
+      def update(message)
+        self.class.auth_hmacsha512_update(@state, message, message.bytesize)
+        self.class.auth_hmacsha512_final(@state.clone, @authenticator)


Ditto here re: https://github.com/crypto-rb/rbnacl/pull/166/files#r167456561

here is the answer #166 (comment)

tarcieri · 2018-02-12T00:16:14Z

lib/rbnacl/hmac/sha512256.rb

+      # @params [#to_str] message message to construct an authenticator for
+      def update(message)
+        self.class.auth_hmacsha512256_update(@state, message, message.bytesize)
+        self.class.auth_hmacsha512256_final(@state.clone, @authenticator)


And ditto here too.

here is the answer #166 (comment)

tarcieri · 2018-02-12T00:17:55Z

This looks mostly good but I think all three primitives you're implementing here should both handle multiple invocations of #update and raise if updated after they've been finalized.

gdwrd · 2018-02-12T16:11:26Z

@tarcieri I also can make that after you call #update method, it will return hexdigest. The same functionality as in openssl #update method.

tarcieri · 2018-02-12T16:36:28Z

@nsheremet sorry I misunderstood how this works. I think the change you suggest (to match the OpenSSL::HMAC behavior) sounds good

gdwrd · 2018-02-12T18:51:47Z

@tarcieri I updated #update method. Done.

gdwrd · 2018-02-13T15:53:18Z

@tarcieri so, will you merge this PR?

tarcieri · 2018-02-14T00:28:54Z

lib/rbnacl/hmac/sha256.rb

      end
    end
+
+    # The crupto_auth_hmacsha256_state struct representation


tarcieri · 2018-02-14T00:30:24Z

spec/shared/hmac.rb

+# encoding: binary
+# frozen_string_literal: true
+
+RSpec.shared_examples "hmac" do


tiny nit but I'd personally prefer "HMAC" here

tarcieri · 2018-02-14T00:30:57Z

One typo and one nit, otherwise it looks good, thanks for your contribution!

gdwrd · 2018-02-14T10:27:34Z

@tarcieri I fixed typos.

gdwrd · 2018-02-15T10:21:19Z

@tarcieri I think that's all 😄

tarcieri · 2018-02-15T17:02:20Z

Thanks!

gdwrd · 2018-02-15T17:10:43Z

@tarcieri I am glad to help!

@tarcieri

## [6.0.0] (2018-11-08) [6.0.0]: RubyCrypto/rbnacl#182 * [#180](RubyCrypto/rbnacl#180) Deprecate rbnacl-libsodium. ([@tarcieri]) * [#176](RubyCrypto/rbnacl#176) Add support for XChaCha20-Poly1305. ([@AnIrishDuck]) * [#174](RubyCrypto/rbnacl#174) Fix buffer size type in `randombytes_buf` binding. ([@elijh]) * [#172](RubyCrypto/rbnacl#172) Add support for argon2id digest. ([@trofi]) * [#166](RubyCrypto/rbnacl#166) Support for non-32-byte HMAC-SHA256/512 keys. ([@nsheremet])

gdwrd force-pushed the hmac_keysize_fix branch from d7afd19 to 0742fd9 Compare December 14, 2017 15:36

non 32 byte keys supporting

c8ccf4f

gdwrd force-pushed the hmac_keysize_fix branch from 0742fd9 to c8ccf4f Compare December 14, 2017 15:51

gdwrd added 2 commits December 14, 2017 17:53

add ExcludedMethods to Metrics/BlockLength in rubocop config

0414fb3

Merge branch 'master' into hmac_keysize_fix

5e03238

gdwrd added 3 commits January 9, 2018 15:34

Merge branch 'master' into hmac_keysize_fix

9f961e8

added #update, #digest, #hexdigest methods to hmac instance, refactor…

74a5f97

… hmacsha512256

fixed rubocop offenses

d0c5edc

tarcieri reviewed Feb 12, 2018

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gdwrd force-pushed the hmac_keysize_fix branch from 18f5952 to 0b3a757 Compare February 12, 2018 18:31

hmac #update method returns a produced hexdigest

def63ed

gdwrd force-pushed the hmac_keysize_fix branch from 0b3a757 to def63ed Compare February 12, 2018 18:38

tarcieri reviewed Feb 14, 2018

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lib/rbnacl/hmac/sha256.rb Outdated

end

end

# The crupto_auth_hmacsha256_state struct representation

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Typo

tarcieri reviewed Feb 14, 2018

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fixed typos

c23f841

tarcieri merged commit 4cba02e into RubyCrypto:master Feb 15, 2018

gdwrd deleted the hmac_keysize_fix branch February 15, 2018 17:10

tarcieri mentioned this pull request Nov 8, 2018

v0.6.0 #182

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anakinj mentioned this pull request Oct 9, 2022

Separated rbnacl hmac implementations jwt/ruby-jwt#521

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HMAC-SHA256/512 non 32 byte keys supporting #166

HMAC-SHA256/512 non 32 byte keys supporting #166

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HMAC-SHA256/512 non 32 byte keys supporting #166

HMAC-SHA256/512 non 32 byte keys supporting #166

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