linux-kernel - [PATCH v2 00/14] Add support for NIST P521 to ecdsa and ecdh

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Date: Thu, 15 Feb 2024 18:13:59 -0500
From: Stefan Berger <stefanb@...ux.ibm.com>
To: keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        herbert@...dor.apana.org.au, davem@...emloft.net
Cc: linux-kernel@...r.kernel.org, saulo.alessandre@....jus.br,
        Stefan Berger <stefanb@...ux.ibm.com>
Subject: [PATCH v2 00/14]  Add support for NIST P521 to ecdsa and ecdh

This series of patches adds support for the NIST P521 curve to ecdsa and
ecdh. Test cases for NIST P521 are added to both modules.

An issue with the current code in ecdsa and ecdh is that it assumes that
input arrays providing key coordinates for example, are arrays of digits
(a 'digit' is a 'u64'). This works well for all currently supported
curves, such as NIST P192/256/384, but does not work for NIST P521 where
coordinates are 8 digits + 2 bytes long. So some of the changes deal with
converting byte arrays to digits and digits to byte arrays.


Regards,
   Stefan

v2:
 - Reformulated some patch descriptions
 - Fixed issue detected by krobot
 - Some other small changes to the code

Stefan Berger (14):
  crypto: ecdsa - Convert byte arrays with key coordinates to digits
  crypto: ecdsa - Adjust tests on length of key parameters
  crypto: ecdsa - Extend res.x mod n calculation for NIST P521
  crypto: ecc - Implement vli_mmod_fast_521 for NIST p521
  crypto: ecc - For NIST P521 use vli_num_bits to get number of bits
  crypto: ecc - Add NIST P521 curve parameters
  crypto: ecdsa - Register NIST P521 and extend test suite
  x509: Add OID for NIST P521 and extend parser for it
  crypto: ecdh - Use properly formatted digits to check for valid key
  crypto: ecc - Implement ecc_digits_to_bytes to convert digits to byte
    array
  crypto: Add nbits field to ecc_curve structure
  crypto: ecc - Implement and use ecc_curve_get_nbytes to get curve's
    nbytes
  crypto: ecdh - Use functions to copy digits from and to byte array
  crypto: ecdh - Add support for NIST P521 and add test case

 crypto/asymmetric_keys/x509_cert_parser.c |   3 +
 crypto/ecc.c                              |  71 +++++--
 crypto/ecc_curve_defs.h                   |  45 +++++
 crypto/ecdh.c                             |  59 +++++-
 crypto/ecdsa.c                            |  48 ++++-
 crypto/testmgr.c                          |  14 ++
 crypto/testmgr.h                          | 225 ++++++++++++++++++++++
 include/crypto/ecc_curve.h                |   3 +
 include/crypto/ecdh.h                     |   1 +
 include/crypto/internal/ecc.h             |  61 +++++-
 include/linux/oid_registry.h              |   1 +
 11 files changed, 495 insertions(+), 36 deletions(-)

-- 
2.43.0