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From: Vitaly Chikunov <vt@altlinux.org>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	David Howells <dhowells@redhat.com>,
	linux-integrity@vger.kernel.org, keyrings@vger.kernel.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms
Date: Thu, 28 Feb 2019 08:37:07 +0300	[thread overview]
Message-ID: <20190228053707.xdod46ohnobtyt4g@altlinux.org> (raw)
In-Reply-To: <1551310117.10911.108.camel@linux.ibm.com>

On Wed, Feb 27, 2019 at 06:28:37PM -0500, Mimi Zohar wrote:
> 
> On Sun, 2019-02-24 at 09:08 +0300, Vitaly Chikunov wrote:
> > Previous akcipher .verify() just `decrypts' (using RSA encrypt which is
> > using public key) signature to uncover message hash, which was then
> > compared in upper level public_key_verify_signature() with the expected
> > hash value, which itself was never passed into verify().
> > 
> > This approach was incompatible with EC-DSA family of algorithms,
> > because, to verify a signature EC-DSA algorithm also needs a hash value
> > as input; then it's used (together with a signature divided into halves
> > `r||s') to produce a witness value, which is then compared with `r' to
> > determine if the signature is correct. Thus, for EC-DSA, nor
> > requirements of .verify() itself, nor its output expectations in
> > public_key_verify_signature() wasn't sufficient.
> > 
> > Make improved .verify() call which gets hash value as input and produce
> > complete signature check without any output besides status.
> > 
> > Now for the top level verification only crypto_akcipher_verify() needs
> > to be called.
> 
> All but this patch apply.  Which branch is this patch based against?

This patchest is over 920d7f7215d87005beb4aa2b90b9cb0b74b36947 in
cryptodev/master.

> 
> Mimi

  reply	other threads:[~2019-02-28  5:37 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-24  6:08 [PATCH v5 00/10] crypto: add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 01/10] KEYS: report to keyctl only actually supported key ops Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 02/10] crypto: akcipher - check the presence of callback before the call Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 03/10] crypto: rsa - unimplement sign/verify for raw RSA backends Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms Vitaly Chikunov
2019-02-27 23:28   ` Mimi Zohar
2019-02-28  5:37     ` Vitaly Chikunov [this message]
2019-02-24  6:08 ` [PATCH v5 05/10] X.509: parse public key parameters from x509 for akcipher Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 06/10] crypto: Kconfig - create Public-key cryptography section Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 07/10] crypto: ecc - make ecc into separate module Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 08/10] crypto: ecrdsa - add EC-RDSA (GOST 34.10) algorithm Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 09/10] crypto: ecrdsa - add EC-RDSA test vectors to testmgr Vitaly Chikunov
2019-02-24  6:08 ` [PATCH v5 10/10] integrity: support EC-RDSA signatures for asymmetric_verify Vitaly Chikunov
2019-02-25 21:20   ` Thiago Jung Bauermann
2019-02-26  4:25     ` Vitaly Chikunov
2019-02-26 12:07       ` Mimi Zohar
2019-02-28 18:18 ` [PATCH v5 04/10] crypto: akcipher - new verify API for public key algorithms David Howells
2019-02-28 18:39   ` Vitaly Chikunov
2019-02-28 19:02   ` David Howells
2019-02-28 19:07     ` Vitaly Chikunov
2019-03-01  2:34       ` Herbert Xu

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