[v2,00/19] Migrate to sig_alg and templatize ecdsa

The original impetus of this series is to introduce P1363 signature
decoding for ecdsa (patch [18/19]), which is needed by the upcoming
SPDM library (Security Protocol and Data Model) for PCI device
authentication.

To facilitate that, move X9.62 signature decoding out of ecdsa.c and
into a template (patch [15/19]).

New in v2:  Move the maximum signature size calculations for ecdsa
out of software_key_query() and into the X9.62 template so that
corresponding calculations can be added for P1363 without further
cluttering up software_key_query() (patch [16/19] - [17/19]).

New in v2:  Avoid inefficient copying from kernel buffers to sglists
in the new templates by introducing a sig_alg backend and migrating
all algorithms to it, per Herbert's advice (patch [02/19] - [12/19]).

Clean up various smaller issues that caught my eye in ecdsa
(patch [01/19] and [14/19]), ecrdsa (patch [19/19]) and
ASN.1 headers (patch [13/19]).

I've also accumulated various cleanups for crypto virtio on my
development branch but will leave them for another day as this
series is already nearing the "too big to review" threshold. ;)

I've run selftests on every single commit, but further testing
would be appreciated to raise the confidence.


Link to v1:

https://lore.kernel.org/all/cover.1722260176.git.lukas@wunner.de/

Changes v1 -> v2:

* [PATCH 13/19] ASN.1: Clean up include statements in public headers
  * Drop "#include <linux/bug.h>" from <linux/asn1_encoder.h> (Jonathan)

* [PATCH 14/19] crypto: ecdsa - Avoid signed integer overflow on signature
  decoding
  * Add code comment explaining why vlen may be larger than bufsize (Stefan)

* [PATCH 15/19] crypto: ecdsa - Move X9.62 signature decoding into template
  * Drop unnecessary "params", "param_len" and "algo" definitions from
    ecdsa_nist_p{192,256,384,521}_tv_template[].
  * Introduce and use struct ecdsa_raw_sig in <crypto/internal/ecc.h>.

* [PATCH 18/19] crypto: ecdsa - Support P1363 signature decoding
  * Drop unnecessary "params", "param_len" and "algo" definitions from
    p1363_ecdsa_nist_p256_tv_template[].


Lukas Wunner (19):
  crypto: ecdsa - Drop unused test vector elements
  crypto: sig - Introduce sig_alg backend
  crypto: ecdsa - Migrate to sig_alg backend
  crypto: ecrdsa - Migrate to sig_alg backend
  crypto: rsa-pkcs1pad - Deduplicate set_{pub,priv}_key callbacks
  crypto: rsassa-pkcs1 - Migrate to sig_alg backend
  crypto: rsassa-pkcs1 - Harden digest length verification
  crypto: rsassa-pkcs1 - Avoid copying hash prefix
  crypto: virtio - Drop sign/verify operations
  crypto: drivers - Drop sign/verify operations
  crypto: akcipher - Drop sign/verify operations
  crypto: sig - Move crypto_sig_*() API calls to include file
  ASN.1: Clean up include statements in public headers
  crypto: ecdsa - Avoid signed integer overflow on signature decoding
  crypto: ecdsa - Move X9.62 signature decoding into template
  crypto: sig - Rename crypto_sig_maxsize() to crypto_sig_keysize()
  crypto: ecdsa - Move X9.62 signature size calculation into template
  crypto: ecdsa - Support P1363 signature decoding
  crypto: ecrdsa - Fix signature size calculation

 Documentation/crypto/api-akcipher.rst         |   2 +-
 Documentation/crypto/api-sig.rst              |  15 +
 Documentation/crypto/api.rst                  |   1 +
 Documentation/crypto/architecture.rst         |   2 +
 crypto/Kconfig                                |   5 +-
 crypto/Makefile                               |   5 +-
 crypto/akcipher.c                             |  64 +-
 crypto/asymmetric_keys/public_key.c           |  58 +-
 crypto/ecdsa-p1363.c                          | 159 ++++
 crypto/ecdsa-x962.c                           | 237 +++++
 crypto/ecdsa.c                                | 209 ++---
 crypto/ecrdsa.c                               |  64 +-
 crypto/internal.h                             |  19 -
 crypto/rsa-pkcs1pad.c                         | 371 +-------
 crypto/rsa.c                                  |  17 +-
 crypto/rsassa-pkcs1.c                         | 442 +++++++++
 crypto/sig.c                                  | 143 +--
 crypto/testmgr.c                              | 320 +++++--
 crypto/testmgr.h                              | 884 +++++++++++++++---
 drivers/crypto/aspeed/aspeed-acry.c           |   2 -
 drivers/crypto/hisilicon/hpre/hpre_crypto.c   |   2 -
 drivers/crypto/starfive/jh7110-rsa.c          |   2 -
 .../virtio/virtio_crypto_akcipher_algs.c      |  65 +-
 include/crypto/akcipher.h                     |  69 +-
 include/crypto/internal/akcipher.h            |   4 +-
 include/crypto/internal/ecc.h                 |  14 +
 include/crypto/internal/rsa.h                 |  29 +
 include/crypto/internal/sig.h                 |  80 ++
 include/crypto/sig.h                          | 152 ++-
 include/linux/asn1_decoder.h                  |   1 +
 include/linux/asn1_encoder.h                  |   1 -
 include/linux/slab.h                          |   1 +
 include/uapi/linux/cryptouser.h               |   5 +
 include/uapi/linux/virtio_crypto.h            |   1 +
 security/integrity/ima/ima_main.c             |   6 +-
 35 files changed, 2398 insertions(+), 1053 deletions(-)
 create mode 100644 Documentation/crypto/api-sig.rst
 create mode 100644 crypto/ecdsa-p1363.c
 create mode 100644 crypto/ecdsa-x962.c
 create mode 100644 crypto/rsassa-pkcs1.c