[v2,0/4] crypto, keys: add ECDSA signature support to key retention service

Message

Ignat Korchagin Oct. 14, 2022, 10:07 a.m. UTC

Changes from v1:
  * fixed code format

Kernel Key Retention Service[1] is a useful building block to build secure
production key management systems. One of its interesting features is
support for asymmetric keys: we can allow a process to use a certain key
(decrypt or sign data) without actually allowing the process to read the
cryptographic key material. By doing so we protect our code from certain
type of attacks, where a process memory memory leak actually leaks a
potentially highly sensitive cryptographic material.

But unfortunately only RSA algorithm was supported until now, because
in-kernel ECDSA implementation supported signature verifications only.

This patchset implements in-kernel ECDSA signature generation and adds
support for ECDSA signing in the key retention service. The key retention
service support was taken out of a previous unmerged patchset from Lei He[2]

[1]: https://www.kernel.org/doc/html/latest/security/keys/core.html
[2]: https://patchwork.kernel.org/project/linux-crypto/list/?series=653034&state=*

Ignat Korchagin (2):
  crypto: add ECDSA signature generation support
  crypto: add ECDSA test vectors from RFC 6979

lei he (2):
  crypto: pkcs8 parser support ECDSA private keys
  crypto: remove unused field in pkcs8_parse_context

 crypto/Kconfig                        |   3 +-
 crypto/Makefile                       |   4 +-
 crypto/asymmetric_keys/pkcs8.asn1     |   2 +-
 crypto/asymmetric_keys/pkcs8_parser.c |  46 +++-
 crypto/ecc.c                          |   9 +-
 crypto/ecdsa.c                        | 373 +++++++++++++++++++++++++-
 crypto/ecprivkey.asn1                 |   6 +
 crypto/testmgr.c                      |  18 ++
 crypto/testmgr.h                      | 333 +++++++++++++++++++++++
 include/crypto/internal/ecc.h         |  10 +
 10 files changed, 787 insertions(+), 17 deletions(-)
 create mode 100644 crypto/ecprivkey.asn1