linux-kernel - [RFC PATCH 0/7] KEYS: Adjust public key signature handling

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Date:	Mon, 29 Feb 2016 18:21:36 +0000
From:	David Howells <dhowells@...hat.com>
To:	keyrings@...r.kernel.org
Cc:	dhowells@...hat.com, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/7] KEYS: Adjust public key signature handling


These patches do the following:

 (1) Retain a signature in an asymmetric-type key and associate with it the
     identifiers that will match a key that can be used to verify it.

 (2) Differentiate an X.509 cert that cannot be used versus one that cannot
     be verified due to unavailable crypto.  This is noted in the
     structures involved.

 (3) Determination of the self-signedness of an X.509 cert is improved to
     include checks on the subject/issuer names and the key
     algorithm/signature algorithm types.

 (4) Self-signed X.509 certificates are consistency checked early on if the
     appropriate crypto is available.

This set of patches is a prelude to a set that changes how trustworthiness
is determined.

David
---
David Howells (7):
      X.509: Whitespace cleanup
      KEYS: Allow authentication data to be stored in an asymmetric key
      KEYS: Add identifier pointers to public_key_signature struct
      X.509: Retain the key verification data
      PKCS#7: Make the signature a pointer rather than embedding it
      X.509: Extract signature digest and make self-signed cert checks earlier
      There's a bug in the code determining whether a certificate is self-signed


 crypto/asymmetric_keys/asymmetric_type.c  |    7 +
 crypto/asymmetric_keys/pkcs7_parser.c     |   38 ++++--
 crypto/asymmetric_keys/pkcs7_parser.h     |   10 +-
 crypto/asymmetric_keys/pkcs7_trust.c      |   12 +-
 crypto/asymmetric_keys/pkcs7_verify.c     |  107 +++++++----------
 crypto/asymmetric_keys/public_key.c       |   20 ++-
 crypto/asymmetric_keys/signature.c        |   18 +++
 crypto/asymmetric_keys/x509_cert_parser.c |   52 +++++---
 crypto/asymmetric_keys/x509_parser.h      |   11 +-
 crypto/asymmetric_keys/x509_public_key.c  |  182 +++++++++++++++++++----------
 include/crypto/public_key.h               |    6 +
 include/keys/asymmetric-subtype.h         |    2 
 include/keys/asymmetric-type.h            |    7 +
 13 files changed, 281 insertions(+), 191 deletions(-)