linux-kernel - Re: Module signing broken after SYSTEM_DATA

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Message-ID: <5375.1440796162@turing-police.cc.vt.edu>
Date:	Fri, 28 Aug 2015 17:09:22 -0400
From:	Valdis.Kletnieks@...edu
To:	David Howells <dhowells@...hat.com>
Cc:	David Woodhouse <David.Woodhouse@...el.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Module signing broken after SYSTEM_DATA_VERIFICATION commit?

On Fri, 28 Aug 2015 11:23:54 +0100, David Howells said:
> Valdis Kletnieks <Valdis.Kletnieks@...edu> wrote:
>
> > [   31.829322] PKCS7: Unknown OID: [32] 2.16.840.1.101.3.4.2.3
> > [   31.829328] PKCS7: Unknown OID: [180] 2.16.840.1.101.3.4.2.3
>
> 	OID_sha1,			/* 1.3.14.3.2.26 */
> 	OID_sha256,			/* 2.16.840.1.101.3.4.2.1 */
>
> I suspect I'm missing something here in oid_registry.h.  Looking online, I
> see:
>
> 	id-sha256 OBJECT IDENTIFIER ::= { hashAlgs 1 }
> 	id-sha384 OBJECT IDENTIFIER ::= { hashAlgs 2 }
> 	id-sha512 OBJECT IDENTIFIER ::= { hashAlgs 3 }
> 	id-sha224 OBJECT IDENTIFIER ::= { hashAlgs 4 }
> 	id-sha512-224 OBJECT IDENTIFIER ::= { hashAlgs 5 }
> 	id-sha512-256 OBJECT IDENTIFIER ::= { hashAlgs 6 }
>
> Are you perchance using sha512 hashes in your signatures?

% grep MODULE_SIG /usr/src/linux-next/.config
CONFIG_MODULE_SIG=y
# CONFIG_MODULE_SIG_FORCE is not set
CONFIG_MODULE_SIG_ALL=y
# CONFIG_MODULE_SIG_SHA1 is not set
# CONFIG_MODULE_SIG_SHA224 is not set
# CONFIG_MODULE_SIG_SHA256 is not set
# CONFIG_MODULE_SIG_SHA384 is not set
CONFIG_MODULE_SIG_SHA512=y
CONFIG_MODULE_SIG_HASH="sha512"
CONFIG_MODULE_SIG_KEY="signing_key.pem"


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