From: David Howells <dhowells@redhat.com>
To: Vitaly Chikunov <vt@altlinux.org>
Cc: dhowells@redhat.com, Stephan Mueller <smueller@chronox.de>,
Herbert Xu <herbert@gondor.apana.org.au>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
linux-integrity@vger.kernel.org, keyrings@vger.kernel.org,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 4/4] crypto: Add EC-RDSA algorithm
Date: Wed, 16 Jan 2019 16:15:20 +0000 [thread overview]
Message-ID: <21602.1547655320@warthog.procyon.org.uk> (raw)
In-Reply-To: <20190107090449.d364ii24zervlsfq@sole.flsd.net>
Vitaly Chikunov <vt@altlinux.org> wrote:
> > Regarding your comment (2), I am not sure I understand. Why do you say that
> > the DER format cannot be parsed by the kernel's ASN.1 parser? For example,
>
> It can, but DER is stricter than BER. For example, in DER 'OCTET STRING'
> length field should be encoded in just one byte if it's smaller than
> 128, in BER it could be encoded in multiple encodings. This does not
> seem like a big deal, though. With BER decoder an improperly DER-encoded
> certificate could be successfully parsed.
Whilst that is true, I don't think it's that big a deal. DER is a subset of
BER, so a BER decoder ought to be able to parse it. Note that X.509 is
supposed to be DER, but we use a BER decoder for that too.
David
next prev parent reply other threads:[~2019-01-16 16:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-06 13:36 [RFC PATCH 0/4] crypto: Add EC-RDSA algorithm Vitaly Chikunov
2019-01-06 13:36 ` [RFC PATCH 1/4] X.509: Parse public key parameters from x509 for akcipher Vitaly Chikunov
2019-02-09 21:42 ` Vitaly Chikunov
2019-02-10 18:46 ` Vitaly Chikunov
2019-02-19 4:37 ` Herbert Xu
2019-02-24 6:48 ` Vitaly Chikunov
2019-02-28 6:14 ` Herbert Xu
2019-02-28 7:04 ` Vitaly Chikunov
2019-02-28 7:11 ` Vitaly Chikunov
2019-02-28 7:51 ` Herbert Xu
2019-02-28 8:28 ` Vitaly Chikunov
2019-02-28 9:01 ` Herbert Xu
2019-02-28 10:33 ` Vitaly Chikunov
2019-02-28 10:37 ` Herbert Xu
2019-03-01 16:06 ` Vitaly Chikunov
2019-01-06 13:36 ` [RFC PATCH 2/4] akcipher: Introduce verify2 for public key algorithms Vitaly Chikunov
2019-01-06 13:36 ` [RFC PATCH 3/4] KEYS: set correct flags for keyctl if encrypt is not supported Vitaly Chikunov
2019-01-06 13:36 ` [RFC PATCH 4/4] crypto: Add EC-RDSA algorithm Vitaly Chikunov
2019-01-06 18:11 ` Stephan Müller
2019-01-07 8:07 ` Vitaly Chikunov
2019-01-07 8:31 ` Stephan Mueller
2019-01-07 9:04 ` Vitaly Chikunov
2019-01-16 16:15 ` David Howells [this message]
2019-01-16 16:19 ` [RFC PATCH 2/4] akcipher: Introduce verify2 for public key algorithms David Howells
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